{"title":"Budget Picks","description":"\u003cp\u003eBig learning, small budget. Every kit here costs under \u003cstrong\u003e₹1,000\u003c\/strong\u003e — complete, pre-tested builds that prove you don't need to spend a lot to start making real electronics.\u003c\/p\u003e\u003cp\u003ePerfect for students, first-timers, gifts, and anyone testing an idea cheaply. You still get every part and a guide; you just pay less. Fast shipping across India with Cash on Delivery and a GST invoice.\u003c\/p\u003e","products":[{"product_id":"arduino-5-in-1-sensor-kit-ultrasonic-pir-ir-proximity-dht11-soil","title":"Arduino 5-in-1 Sensor Kit: Ultrasonic, PIR, IR Proximity, DHT11, Soil","description":"\u003ch1\u003eArduino 5-in-1 Sensor Kit: Ultrasonic, PIR, IR Proximity, DHT11, Soil\u003c\/h1\u003e\u003cp\u003eThis 5-in-1 sensor kit provides essential modules for your Arduino projects. It includes an HC-SR04 ultrasonic distance sensor, a PIR motion detector, an IR proximity sensor, a DHT11 temperature and humidity sensor, and a capacitive soil moisture sensor. Ideal for robotics, home automation, and environmental monitoring.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensors Included\u003c\/td\u003e\n\u003ctd\u003eHC-SR04, PIR (HC-SR501), IR Obstacle Avoidance, DHT11, Soil Moisture (Capacitive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V–5V DC (all sensors)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltrasonic Range\u003c\/td\u003e\n\u003ctd\u003e2 cm – 400 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDHT11 Accuracy\u003c\/td\u003e\n\u003ctd\u003e±2°C (temperature), ±5% RH (humidity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePIR Detection Range\u003c\/td\u003e\n\u003ctd\u003eUp to 7 meters, 120° cone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoil Sensor Output\u003c\/td\u003e\n\u003ctd\u003eAnalog voltage (0–3V) proportional to moisture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSmart home security system with PIR motion alerts and ultrasonic intruder detection\u003c\/li\u003e\n\u003cli\u003eAutomatic plant watering system using soil moisture sensor and relay\u003c\/li\u003e\n\u003cli\u003eWeather station logging temperature, humidity, and rain detection\u003c\/li\u003e\n\u003cli\u003eObstacle-avoiding robot with IR and ultrasonic sensors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eAll sensors work with Arduino Uno, Mega, Nano, and ESP8266\/ESP32 boards. They operate on 5V logic, with some also supporting 3.3V. The DHT11 and PIR require one digital pin each; the ultrasonic uses two pins (trigger, echo); the IR and soil sensors use one digital\/analog pin. Common libraries: DHT.h, NewPing.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to 5V and GND to common ground. For the ultrasonic sensor, trigger to pin 9, echo to pin 10. PIR sensor output to pin 2, with a 10-second delay on startup. DHT11 data pin to pin 4 with a 10k pull-up resistor to VCC. Soil sensor analog out to A0.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, with 3.3V logic level converters for the ultrasonic and PIR sensors. The DHT11 and soil sensor work directly with 3.3V.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it include sample code and datasheets?\u003c\/summary\u003e\u003cp\u003eAll components come with link to online datasheets. Sample Arduino sketches are available on our support page.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use this kit for a school project?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The sensors are pre-soldered and ready to use, with standard pin headers for easy breadboarding.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444946264429,"sku":"CDN-0046","price":120.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/arduino-5-in-1-sensor-kit-ultrasonic-pir-ir-proximity-dht11-soil-9636325.jpg?v=1790780347"},{"product_id":"esp8266-iot-starter-kit-with-dht11-temperature-sensor","title":"ESP8266 IoT Starter Kit with DHT11 Temperature Sensor","description":"\u003ch1\u003eESP8266 IoT Starter Kit with DHT11 Temperature Sensor\u003c\/h1\u003e\n\n\u003cp\u003eThis IoT starter kit includes an ESP8266 NodeMCU development board and a DHT11 temperature and humidity sensor, along with essential electronic components for building connected prototypes. Suitable for beginners, it provides a hands-on introduction to Wi-Fi-controlled projects using the Arduino IDE. Quickly set up a weather station, home automation system, or remote sensor network.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicrocontroller\u003c\/td\u003e\n\u003ctd\u003eESP8266 (NodeMCU v3)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWireless\u003c\/td\u003e\n\u003ctd\u003eWi-Fi 802.11 b\/g\/n\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor\u003c\/td\u003e\n\u003ctd\u003eDHT11 (temp. 0–50°C, humidity 20–90% RH)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e4.5–9V DC (Micro USB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eKit Contents\u003c\/td\u003e\n\u003ctd\u003e1x ESP8266 board, 1x DHT11 sensor, 1x breadboard 400 points, 10x jumper wires M\/M, 5x LEDs (red\/green\/blue), 5x 220Ω resistors, 1x USB cable\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProgramming\u003c\/td\u003e\n\u003ctd\u003eArduino IDE, Lua, MicroPython\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWi-Fi weather station logging temperature and humidity to the cloud\u003c\/li\u003e\n  \u003cli\u003eSmart home sensor that sends alerts when threshold values are exceeded\u003c\/li\u003e\n  \u003cli\u003eIoT-controlled LED strip or relay for home automation\u003c\/li\u003e\n  \u003cli\u003eRemote plant watering system with soil moisture sensor (add external module)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe NodeMCU ESP8266 board works with standard 3.3V logic. It is compatible with common sensors and actuators that operate within the GPIO voltage level. Use the Arduino IDE with the ESP8266 board package for easy programming. Works seamlessly with the DHT11 sensor included, as well as other I2C and SPI devices.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the DHT11 data pin to GPIO2 (D4) on the NodeMCU; a 10kΩ pull-up resistor (not included) is recommended between VCC and data. The board draws up to 400 mA peak current, so power via USB or a stable 5V supply. Always double-check pin mapping to avoid GPIO conflicts with boot modes.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eThe ESP8266 board is a standalone microcontroller and does not require an Arduino Uno. It can be programmed directly via USB using the Arduino IDE.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need to solder anything?\u003c\/summary\u003e\u003cp\u003eNo soldering is required. The kit includes a solderless breadboard and jumper wires for quick prototyping.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the DHT11 accurate enough for serious projects?\u003c\/summary\u003e\u003cp\u003eThe DHT11 provides ±2°C temperature accuracy and ±5% humidity accuracy, suitable for learning and non-critical applications. For higher precision, upgrade to a DHT22 sensor.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444952457581,"sku":"CDN-0192","price":292.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/esp8266-iot-starter-kit-with-dht11-temperature-sensor-5515848.jpg?v=1790780228"},{"product_id":"2wd-robot-chassis-kit-with-motors-and-wheels-for-diy-robotics","title":"2WD Robot Chassis Kit with Motors and Wheels for DIY Robotics","description":"\u003ch1\u003e2WD Robot Chassis Kit with DC Motors and 65mm Wheels\u003c\/h1\u003e\u003cp\u003eThis 2WD chassis provides a sturdy base for building mobile robots. It includes two DC motors, wheels, and a laser-cut acrylic frame with mounting holes for sensors, microcontrollers, and battery packs. Ideal for beginners and makers exploring autonomous navigation, remote control, or sensor integration.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Type\u003c\/td\u003e\n\u003ctd\u003eDC geared, 6-12V operating range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Speed\u003c\/td\u003e\n\u003ctd\u003e150 RPM at 6V (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Diameter\u003c\/td\u003e\n\u003ctd\u003e65 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChassis Material\u003c\/td\u003e\n\u003ctd\u003eAcrylic (3 mm thick)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePayload Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 1 kg (depending on surface)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Holes\u003c\/td\u003e\n\u003ctd\u003eStandard pattern for Arduino Uno, sensor boards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLine follower robot using IR sensor array\u003c\/li\u003e\n\u003cli\u003eObstacle-avoiding car with ultrasonic sensor\u003c\/li\u003e\n\u003cli\u003eBluetooth-controlled rover via HC-05 module\u003c\/li\u003e\n\u003cli\u003eWiFi surveillance bot with ESP32-CAM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eWorks directly with Arduino Uno, Nano, Mega, and Raspberry Pi (using motor driver like L298N or L293D). The motor voltage range (6-12V) allows use with common 2S or 3S Li-ion packs. The chassis plate includes cutouts for standard sensor mounting brackets.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect each motor to a motor driver board; the typical wiring uses two channels for left and right motors. For encoder-less models, ensure sufficient PWM frequency to avoid low-speed jitter. Always add a flyback diode if your driver does not include protection.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the chassis has mounting holes that fit an Arduino Uno board. You'll need an external motor driver (like L298N) to control the motors from the Arduino.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat battery should I use?\u003c\/summary\u003e\u003cp\u003eA 7.4V or 11.1V Li-ion battery pack works best, providing sufficient voltage for the motors. Ensure the battery can supply at least 1A peak current.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre the motors encoder-equipped?\u003c\/summary\u003e\u003cp\u003eNo, these are basic DC motors without encoders. For precise odometry, you can add external encoders or upgrade to a chassis with encoder motors.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445057053037,"sku":"CDN-0878","price":280.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/2wd-robot-chassis-kit-with-motors-and-wheels-for-diy-robotics-3419197.jpg?v=1790779748"},{"product_id":"esp32-smart-iot-learning-kit-with-oled-display","title":"ESP32 Smart IoT Learning Kit with OLED Display","description":"\u003ch1\u003eESP32 Smart IoT Learning Kit with OLED Display\u003c\/h1\u003e\n\u003cp\u003eThe ESP32 Smart IoT Learning Kit is a complete starter pack for building Internet of Things projects with visual feedback. It centres on an ESP32 development board and a 0.96-inch OLED display, letting you create sensor dashboards, data loggers, and wireless control panels right out of the box. Beginners get a ready-to-use platform that combines powerful Wi‑Fi and Bluetooth with a crisp monochrome screen, making it easy to see sensor readings and network status while learning.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicrocontroller\u003c\/td\u003e\n\u003ctd\u003eESP32-WROOM-32 dual-core 240 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWireless\u003c\/td\u003e\n\u003ctd\u003eWi-Fi 802.11 b\/g\/n, Bluetooth 4.2 and BLE\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003e0.96\" OLED 128×64 px, I2C (SSD1306)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V (USB) with 3.3V I\/O logic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlash Memory \/ RAM\u003c\/td\u003e\n\u003ctd\u003e4 MB Flash, 520 KB SRAM\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eIoT weather station showing live temperature and humidity on the OLED\u003c\/li\u003e\n  \u003cli\u003eWireless notification display that pulls tweets or emails from the web\u003c\/li\u003e\n  \u003cli\u003eBluetooth proximity tag that shows signal strength and device name\u003c\/li\u003e\n  \u003cli\u003eHome automation dashboard that toggles lights and reads sensor status\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis kit works with the Arduino IDE, MicroPython, and Espressif IDF. All I\/O is 3.3 V logic, so 5 V sensors like the HC-SR04 ultrasonic module need a simple level shifter. The OLED and included jumper wires connect directly to standard ESP32 development boards with 2.54 mm pin headers.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the OLED SDA pin to GPIO21 and SCL to GPIO22 on most ESP32 boards. Power the display from the 3.3 V rail – avoid the 5 V pin to prevent damage. Always unplug USB before wiring, and keep current draw per pin below 12 mA.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with the Arduino IDE?\u003c\/summary\u003e\u003cp\u003eYes, the ESP32 can be programmed using the Arduino IDE. Install the ESP32 board package via Boards Manager and select the ESP32 Dev Module.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the kit include a battery pack?\u003c\/summary\u003e\u003cp\u003eNo battery is included. The board is powered through the micro USB cable supplied in the kit. For portable use, you can connect a single-cell Li‑ion battery to the appropriate pins.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat other components can I connect to the OLED?\u003c\/summary\u003e\u003cp\u003eThe OLED uses the I2C bus, so many sensors like the BME280, MPU6050, or an RTC can share the same SDA and SCL lines as long as each has a unique address.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445083758957,"sku":"CDN-0008","price":810.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/esp32-smart-iot-learning-kit-with-oled-display-4450043.jpg?v=1790779628"},{"product_id":"uno-r3-starter-kit-breadboard-leds-resistors-wires-power","title":"UNO R3 Starter Kit: Breadboard, LEDs, Resistors, Wires \u0026 Power","description":"\u003ch1\u003eStarter Kit with UNO R3, Breadboard, LED, Resistor, Jumper Wires and Power\u003c\/h1\u003e\n\u003cp\u003eThis complete starter kit includes everything you need to begin with microcontroller programming and electronics prototyping. The included UNO R3 board is compatible with Arduino IDE and widely used in educational and hobby projects. Ideal for learning basic circuits, coding, and building interactive devices.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUNO R3 Board\u003c\/td\u003e\n\u003ctd\u003e1 unit, ATmega328P, 5V logic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBreadboard\u003c\/td\u003e\n\u003ctd\u003e830 tie-points, self-adhesive backing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLEDs\u003c\/td\u003e\n\u003ctd\u003e5 each: Red, Green, Yellow (5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResistors\u003c\/td\u003e\n\u003ctd\u003e20 pieces: 220Ω, 1kΩ, 10kΩ (1\/4W)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eJumper Wires\u003c\/td\u003e\n\u003ctd\u003e30 pieces, male-to-male, 20cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e9V battery snap with DC barrel jack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eBlink an LED and control multiple lights\u003c\/li\u003e\n  \u003cli\u003eCreate a traffic light simulator with delays\u003c\/li\u003e\n  \u003cli\u003eBuild a simple temperature sensor using analog input\u003c\/li\u003e\n  \u003cli\u003eMake a push-button controlled countdown timer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eFully compatible with Arduino IDE and all standard Arduino libraries. Works with Windows, macOS, and Linux. The UNO R3 board can interface with most 5V sensors, servo motors, and shields. Power it via USB or the included 9V battery connector.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003ePlace the UNO board on the breadboard or use jumper wires to bridge connections. LEDs require a 220Ω resistor in series to prevent burnout. Ensure correct polarity: longer leg is anode. Use red wire for 5V, black for GND.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino IDE?\u003c\/summary\u003e\u003cp\u003eYes, the UNO R3 board works seamlessly with the official Arduino IDE. Just select “Arduino Uno” from the board manager and upload your code.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need to solder anything?\u003c\/summary\u003e\u003cp\u003eNo soldering required. All connections are made using the breadboard and jumper wires. Plug and play.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat projects can a complete beginner build?\u003c\/summary\u003e\u003cp\u003eYou can start with blinking an LED, then move to button-controlled LEDs, a digital dice, or a small alarm system. Each project teaches basic coding and circuit design.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445086609773,"sku":"CDN-0088","price":425.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/uno-r3-starter-kit-breadboard-leds-resistors-wires-power-9684184.jpg?v=1790779567"},{"product_id":"37-in-1-sensor-kit-for-arduino-37-modules-sensors-pack","title":"37 in 1 Sensor Kit for Arduino – 37 Modules \u0026 Sensors Pack","description":"\u003ch1\u003e37 in 1 Sensor Kit for Arduino – 37 Sensors and Modules\u003c\/h1\u003e\n\u003cp\u003eThe 37 in 1 Sensor Kit bundles 37 commonly used sensors and modules for Arduino and compatible microcontroller boards. It covers a wide range of inputs—light, sound, motion, temperature, humidity, and distance—giving you everything to start prototyping without hunting for individual parts. The kit eliminates guesswork and speeds up project development.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eNumber of Sensors\/Modules\u003c\/td\u003e\n\u003ctd\u003e37\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface Types\u003c\/td\u003e\n\u003ctd\u003eDigital, Analog, I2C, Serial\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatible Boards\u003c\/td\u003e\n\u003ctd\u003eArduino Uno, Mega, Nano, ESP32, Raspberry Pi\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackage Includes\u003c\/td\u003e\n\u003ctd\u003eJumper wires, PCB, sensors list card\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eObstacle-avoiding robot using ultrasonic and IR sensors\u003c\/li\u003e\n  \u003cli\u003eIndoor weather station logging temperature and humidity\u003c\/li\u003e\n  \u003cli\u003eMotion-activated alarm with PIR sensor and buzzer\u003c\/li\u003e\n  \u003cli\u003eSmart plant watering system using soil moisture sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe kit works with any 5V or 3.3V microcontroller board. All sensors use standard 3-pin or 4-pin headers, making them plug-and-play on Arduino Uno, Mega, Nano, and ESP32 boards. Raspberry Pi users can interface via GPIO with logic level converters for 5V-tolerant sensors.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eEach module includes a dedicated VCC, GND, and signal pin. Always match the module’s operating voltage to your board (most are 5V tolerant). Analog sensors require analog pins (A0–A5 on Uno), while digital modules connect to any digital I\/O. Keep jumper wires short to avoid noise on high-speed signals like ultrasonic echo.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno R4?\u003c\/summary\u003e\u003cp\u003eYes, all 37 modules work directly with Arduino Uno R4 using the same 5V logic and pin headers.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the kit include tutorials or sample code?\u003c\/summary\u003e\u003cp\u003eThe kit includes a sensor list card; downloadable code libraries and example sketches are available from the Arduino community and Compoden’s support page.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I power multiple sensors from Arduino’s 5V pin?\u003c\/summary\u003e\u003cp\u003eMany modules draw under 20 mA each, so running 4–5 sensors simultaneously is safe. For larger setups, use an external 5V supply to avoid overloading the board’s regulator.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445086871917,"sku":"CDN-0096","price":940.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/37-in-1-sensor-kit-for-arduino-37-modules-sensors-pack-1949386.jpg?v=1790779567"},{"product_id":"professional-arduino-starter-kit-with-sensors-modules-compoden","title":"Professional Arduino Starter Kit with Sensors \u0026 Modules | Compoden","description":"\u003ch1\u003eProfessional Starter Kit with Uno, Sensors and Modules\u003c\/h1\u003e\n\u003cp\u003eThis comprehensive starter kit equips you with an Arduino Uno R3 compatible board (CH340), a curated set of sensors, and essential modules to dive into electronics prototyping. Each component is accompanied by verified code examples and wiring schematics, allowing you to move from concept to working circuit immediately without guesswork.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicrocontroller board\u003c\/td\u003e\n\u003ctd\u003eArduino Uno R3 compatible board\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensors included\u003c\/td\u003e\n\u003ctd\u003eUltrasonic HC-SR04, DHT11 temperature \u0026amp; humidity, PIR motion, IR obstacle avoidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModules included\u003c\/td\u003e\n\u003ctd\u003e5V relay, active buzzer, 16x2 LCD with I2C interface, pushbutton set\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAdditional components\u003c\/td\u003e\n\u003ctd\u003eFull-size breadboard, jumper wire kit (65 pcs), LEDs (5mm red\/green\/blue), resistors (220Ω, 1kΩ, 10kΩ), photoresistor, potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePower and connectivity\u003c\/td\u003e\n\u003ctd\u003eUSB A to B cable, 9V battery snap connector, DC barrel jack adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDocumentation\u003c\/td\u003e\n\u003ctd\u003eDetailed PDF with code sketches, wiring diagrams, and component datasheets\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMotion-activated alarm system combining the PIR sensor and buzzer module\u003c\/li\u003e\n  \u003cli\u003eDistance meter that displays readings from the ultrasonic sensor on the LCD screen\u003c\/li\u003e\n  \u003cli\u003eRoom temperature and humidity monitor with data logging via the DHT11 and LCD\u003c\/li\u003e\n  \u003cli\u003eLight-sensitive night lamp using photoresistor, relay, and an LED lamp\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe included Uno board uses the ATmega328P microcontroller and is fully compatible with the Arduino IDE on Windows, macOS, and Linux. All sensors and modules operate at 5V logic, matching the Uno’s I\/O voltage. You can also repurpose these components with ESP8266 or ESP32 boards using a logic level shifter if 3.3V tolerance is required. The relay module can switch loads up to 10A at 250VAC, but always check current ratings for safe operation.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eEach sensor module has clearly labeled VCC (5V), GND, and signal pins—connect them directly to the breadboard and Uno pins as shown in the included schematics. The buzzer and relay draw more current than single I\/O pins can safely source; use the breadboard’s power rails and a transistor driver where noted in the code comments. Never exceed 20mA per pin without an external driver circuit.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with original Arduino boards?\u003c\/summary\u003e\u003cp\u003eYes, the included Uno R3 clone uses the same chip and pinout—all code and schematics work identically with genuine Arduino boards.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the kit include a printed book or manual?\u003c\/summary\u003e\u003cp\u003eThe documentation is a comprehensive digital PDF (downloadable) with code, schematics, and links to additional learning resources. A printed quick-start sheet is included in the box.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use the sensors with a 3.3V board like ESP32?\u003c\/summary\u003e\u003cp\u003eThe sensors are 5V, but many operate within 3.3-5V range. For strictly 5V sensors, use a logic level shifter or power them from the USB 5V rail while connecting data pins through a voltage divider, as explained in the schematics.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445086937453,"sku":"CDN-0098","price":781.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/professional-arduino-starter-kit-with-sensors-modules-compoden-8518075.jpg?v=1790779567"},{"product_id":"9-in-1-arduino-sensor-kit-ultrasonic-pir-dht11-mq2-ldr-compoden","title":"9 in 1 Arduino Sensor Kit | Ultrasonic, PIR, DHT11, MQ2, LDR - Compoden","description":"\u003ch1\u003e9 in 1 Arduino Sensor Kit - Ultrasonic, PIR, IR, DHT11, MQ2, LDR, Sound, Rain\u003c\/h1\u003e\n\u003cp\u003eThis 9-in-1 sensor kit bundles the most commonly used environmental and motion sensors for Arduino prototyping. It includes ultrasonic distance, passive infrared motion, infrared obstacle avoidance, temperature and humidity (DHT11), flammable gas (MQ2), light-dependent resistor, sound detection, and rain detection modules. Perfect for building home automation, security, and environmental monitoring projects on a single set of boards.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Types\u003c\/td\u003e\n\u003ctd\u003eHC-SR04 Ultrasonic, HC-SR501 PIR, IR Obstacle, DHT11 Temp\/Humidity, MQ2 Gas, LDR, Sound, Rain, IR Receiver\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC (module-dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eDigital (GPIO), Analog (ADC), 1-Wire (DHT11)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePCB Size (per module)\u003c\/td\u003e\n\u003ctd\u003eVaries: approx. 32mm x 14mm to 45mm x 20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackage Contents\u003c\/td\u003e\n\u003ctd\u003e9 sensor modules, no jumper wires\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHome security alarm with PIR motion and ultrasonic entry detection\u003c\/li\u003e\n  \u003cli\u003eIndoor weather station using DHT11 temperature\/humidity and LDR light level\u003c\/li\u003e\n  \u003cli\u003eGas leak alert system combining MQ2 sensor with a buzzer and relay\u003c\/li\u003e\n  \u003cli\u003eSmart irrigation controller using rain sensor and soil moisture substitute\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eAll modules operate at 5V logic and connect directly to Arduino Uno, Mega, Nano, or similar 5V boards. For 3.3V platforms like Raspberry Pi, use a level shifter on the signal lines to avoid damage. The DHT11 requires a 10k pull-up resistor on its data line, which is not included. Most modules draw under 20mA each, keeping total current well within USB power limits.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eEach sensor has VCC (5V), GND, and one or more signal pins. Connect VCC to the 5V rail on your board, GND to common ground, and signal to a digital or analog input. For the HC-SR04 ultrasonic sensor, trigger and echo pins go to separate digital I\/O. PIR output is 3.3V but safely read by 5V Arduino pins. IR obstacle and sound sensors output digital HIGH\/LOW; LDR and MQ2 give analog voltages.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, all sensors run at 5V and can be directly wired to the Uno’s GPIO pins without extra components, except the DHT11 which needs a 10k pull-up resistor on its data line.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo the sensors come with connecting wires?\u003c\/summary\u003e\u003cp\u003eNo, this kit includes only the 9 sensor modules. You will need separate male-to-female jumper wires to interface them with a breadboard or microcontroller.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this kit with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, but you must use a 5V to 3.3V logic level converter for any digital sensor signals. The Pi’s GPIO pins are not 5V-tolerant and can be damaged if connected directly.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445096636781,"sku":"CDN-0195","price":550.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/9-in-1-arduino-sensor-kit-ultrasonic-pir-dht11-mq2-ldr-compoden-9792530.jpg?v=1790779566"},{"product_id":"5-in-1-arduino-sensor-kit-ultrasonic-pir-ir-dht11-soil-moisture-0201","title":"5-in-1 Arduino Sensor Kit | Ultrasonic, PIR, IR, DHT11, Soil Moisture","description":"\u003ch1\u003e5 in 1 Arduino Sensor Kit - Ultrasonic, PIR, IR Proximity, DHT11, and Soil\u003c\/h1\u003e\n\u003cp\u003eThe 5-in-1 Arduino sensor kit bundles five essential sensing modules on a single board, covering distance, motion, temperature\/humidity, IR proximity, and soil moisture. Ideal for prototyping, school projects, and hobbyist experiments without sourcing and wiring individual sensors separately.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Modules\u003c\/td\u003e\n\u003ctd\u003eHC-SR04 Ultrasonic, PIR Motion, IR Avoidance, DHT11 Temp\/Humidity, Soil Moisture\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC (all sensors)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUltrasonic Range\u003c\/td\u003e\n\u003ctd\u003e2 cm to 400 cm (approx. 0.02 m to 4 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePIR Detection Angle\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 120° conical (typical up to 7 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDHT11 Accuracy\u003c\/td\u003e\n\u003ctd\u003eTemperature ±2°C, Humidity ±5% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSoil Moisture Output\u003c\/td\u003e\n\u003ctd\u003eAnalog voltage, 0–5 V proportional to moisture level\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomatic plant watering system using soil moisture and DHT11\u003c\/li\u003e\n  \u003cli\u003eObstacle‑avoiding robot with ultrasonic and IR sensors\u003c\/li\u003e\n  \u003cli\u003eSmart home security alarm with PIR motion detection\u003c\/li\u003e\n  \u003cli\u003eEnvironment monitoring station logging temperature, humidity, and soil data\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks directly with Arduino Uno, Mega, Nano, and most 5V microcontrollers. Also compatible with 3.3V boards (ESP8266, ESP32, Raspberry Pi Pico) when using external 5V supply and level shifting on logic pins. Each sensor communicates via standard digital or analog I\/O—pair with LCD displays, relays, or motor drivers for complete projects.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eAll modules connect with male‑to‑female jumper wires. HC‑SR04 uses Trig (output) and Echo (input) digital pins. PIR and IR obstacle sensors output a HIGH digital signal on detection. DHT11 uses a single digital pin with a pull‑up resistor already on‑board. Soil moisture sensor connects to any analog input. Avoid powering all five sensors from the Arduino 5V pin in battery‑powered applications; use an external 5V supply for reliable operation.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, all five sensors can be directly connected to an Arduino Uno. Each module works at 5V logic and provides standard digital or analog signals that Uno pins can read without additional components.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the kit include jumper wires?\u003c\/summary\u003e\u003cp\u003eThe kit contains only the sensor modules on the breakout board. You will need a set of male‑to‑female Dupont wires to connect the pins to your Arduino.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this kit with a Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eIt is possible, but the sensors output 5V signals while the Raspberry Pi GPIO operates at 3.3V. Direct connection may damage the Pi. Use a logic level converter for safe interfacing and supply the sensors from an external 5V source.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445097259373,"sku":"CDN-0201","price":130.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/5-in-1-arduino-sensor-kit-ultrasonic-pir-ir-dht11-soil-moisture-4417964.jpg?v=1790779566"},{"product_id":"kit-servo-waving-hand","title":"Waving Hand Kit with Arduino Uno + 5 Servos","description":"\u003cp\u003eWaving Hand Kit with Arduino Uno + 5 Servos — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eWaving Hand Kit with Arduino Uno + 5 Servos — Build a Button-Activated Robotic Hand in 1-2 Hours\u003c\/h1\u003e\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Servo motor control \u0026amp; Arduino input handling\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003eImagine a simple mechanism that waves hello each time you press a button. This kit guides you in wiring a tactile button to an Arduino Uno, programming it to read the input, and driving an SG90 servo to swing back and forth like a hand waving. It’s a charming first project that demystifies microcontrollers and physical motion. Whether you’re a curious child, a parent nurturing STEM skills, or a teacher running a tinkering lab, this build turns code into a visible, friendly response in just an hour or two.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble a breadboard circuit with a pushbutton and a servo motor, then load a pre-written sketch that makes the servo arm sweep when the button is pressed. The result is a waving hand that responds instantly to touch, perfect for desk-top amusement or demonstrating input\/output concepts. The entire project stays on the breadboard, so there’s no soldering required, and all connections are clearly documented.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow to read a digital button press and debounce it in code\u003c\/li\u003e\n  \u003cli\u003eControlling an SG90 servo’s angular position using Arduino’s Servo library\u003c\/li\u003e\n  \u003cli\u003eWiring a pull-down resistor to stabilise input signals\u003c\/li\u003e\n  \u003cli\u003eTranslating real-world interactions into programmed motor responses\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSG90 Servo\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTactile Button\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003ePerfect for young makers (age 5+) exploring robotics for the first time, this kit aligns with CBSE Class 6-10 science curriculum and ATL Tinkering Lab activities. B.Tech ECE first-year students can use it as a foundational microcontroller project. Even parents looking for hands-on STEM gifts will find it an ideal introduction to Arduino and servo control.\u003c\/p\u003e\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code or message our WhatsApp support to access the AI companion. It provides step-by-step audio and visual instructions, and our team can help troubleshoot in real time.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan a 5-year-old assemble this kit independently?\u003c\/summary\u003e\u003cp\u003eAdult supervision is recommended for younger builders, but the colour-coded wires and large breadboard make it easy to follow the visual guide. The AI companion uses simple language and pictures to walk them through each connection.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat if the servo doesn’t move when I press the button?\u003c\/summary\u003e\u003cp\u003eDouble-check the pull-down resistor connection on the button and ensure the servo’s signal wire is on pin 9. Our AI companion includes a diagnostic mode that will highlight wiring mistakes specific to this circuit.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I modify the code to make the hand wave continuously without pressing the button?\u003c\/summary\u003e\u003cp\u003eYes, you can edit the Arduino sketch to loop the sweep motion automatically. The AI companion even includes a variant code snippet that does exactly that, teaching you about loop structures and delays.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eSingle SG90 servo sweeps back and forth to wave like a hand when button pressed.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/sg90-servo-motor-9g-micro-servo-for-robotics-arduino\"\u003eSG90 Servo\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/tactile-button-pack-10x-6mm-switches-with-colored-caps-compoden\"\u003eTactile Button\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Waving Hand Kit with Arduino Uno + 5 Servos across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Waving Hand Kit with Arduino Uno + 5 Servos?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Waving Hand Kit with Arduino Uno + 5 Servos?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Waving Hand Kit with Arduino Uno + 5 Servos includes all components needed: Arduino Uno R3, SG90 Servo, Tactile Button, 10kΩ Resistors, 400-pt Breadboard and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Waving Hand Kit with Arduino Uno + 5 Servos?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Single SG90 servo sweeps back and forth to wave like a hand when button pressed. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Waving Hand Kit with Arduino Uno + 5 Servos online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Waving Hand Kit with Arduino Uno + 5 Servos is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455240102253,"sku":"CDN-KIT-0041-CL","price":790.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455240135021,"sku":"CDN-KIT-0041-R3","price":2410.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455240167789,"sku":"CDN-KIT-0041-R4","price":2710.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/waving-hand-kit-with-arduino-uno-5-servos-5553701.png?v=1790779267"},{"product_id":"kit-servo-door-lock","title":"Door Lock Kit with Arduino Uno + Servo","description":"\u003cp\u003eDoor Lock Kit with Arduino Uno + Servo — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eDoor Lock Kit with Arduino Uno + Servo\u003c\/h1\u003e\u003cp\u003eButton press rotates servo 90 degrees to lock and unlock a simple cardboard door model.\u003c\/p\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eButton press rotates servo 90 degrees to lock and unlock a simple cardboard door model.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/sg90-servo-motor-9g-micro-servo-for-robotics-arduino\"\u003eSG90 Servo\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/tactile-button-pack-10x-6mm-switches-with-colored-caps-compoden\"\u003eTactile Button\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Door Lock Kit with Arduino Uno + Servo across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Door Lock Kit with Arduino Uno + Servo?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Door Lock Kit with Arduino Uno + Servo?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Door Lock Kit with Arduino Uno + Servo includes all components needed: Arduino Uno R3, SG90 Servo, Tactile Button, 10kΩ Resistors, 400-pt Breadboard and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Door Lock Kit with Arduino Uno + Servo?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Button press rotates servo 90 degrees to lock and unlock a simple cardboard door model. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Door Lock Kit with Arduino Uno + Servo online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Door Lock Kit with Arduino Uno + Servo is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455240200557,"sku":"CDN-KIT-0042-CL","price":850.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455240233325,"sku":"CDN-KIT-0042-R3","price":2470.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455240266093,"sku":"CDN-KIT-0042-R4","price":2770.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/door-lock-kit-with-arduino-uno-servo-1245704.png?v=1790779267"},{"product_id":"kit-stepper-motor-clock-sweep","title":"Clock Sweep Kit with Arduino Uno + Stepper Motor","description":"\u003cp\u003eClock Sweep Kit with Arduino Uno + Stepper Motor — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eClock Sweep Kit: Build a Smooth-Sweep Analog Clock with Arduino Uno and Stepper Motor\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 8+\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Precision motor timing with real‑time clock\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eMost DIY clocks tick loudly from a cheap quartz module. This kit flips that idea. You’ll program a stepper motor to sweep a clock hand like a luxury wall clock — silent, smooth, and accurate to the second because it reads time from a DS3231 RTC chip. By the time you power it on, you’ll have wired I2C communication, calibrated the 28BYJ-48 stepper’s 2048 steps per revolution, and turned a microcontroller into a true timekeeping device. Perfect for school science models, ATL Tinkering Lab displays, or a desk clock that actually teaches how time is measured digitally.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble a circuit where the Arduino reads the exact hour, minute, and second from the DS3231 over I2C, then calculates how many stepper motor steps are needed to point the clock hand to that position. The 28BYJ-48 moves the hand in tiny 5.625° increments, so instead of jumpy ticking, you get a fluid sweep — exactly 60 discreet micro-movements per minute, creating the illusion of continuous motion. The final model can mount on a cardboard dial or acrylic face, and you’ll set the time once; the RTC’s battery backup keeps it running even after you unplug the Arduino.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eI2C protocol — talking to the DS3231 RTC and reading real‑time registers\u003c\/li\u003e\n  \u003cli\u003eStepper motor control — driving the 28BYJ-48 with a ULN2003 driver, half‑stepping for smooth motion\u003c\/li\u003e\n  \u003cli\u003eMapping time to angles — converting hours, minutes, seconds into motor step counts\u003c\/li\u003e\n  \u003cli\u003eArduino programming — writing a loop that updates hand position every second without drift\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e28BYJ-48 Stepper\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eULN2003 Driver\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDS3231 RTC\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e4.7kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eThis is a beginner-friendly project that fits CBSE Class 11–12 physics and computer science students exploring sensor integration, as well as B.Tech ECE\/EEE first‑years learning embedded interfacing. It’s also a strong contender for ATL Tinkering Lab challenges — demonstrate a working clock that isn’t just a module but a finely controlled motor system. Hobbyists preparing for Smart India Hackathon health‑monitoring prototypes will appreciate the DS3231’s precise time‑stamping skills gained here.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code on the box to chat with the AI companion that knows every wire connection and code line for this clock sweep project. If something still feels off, message us on WhatsApp and a human builder will jump in within hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need to buy a clock hand and dial separately?\u003c\/summary\u003e\u003cp\u003eThe kit includes all electronics, but you’ll need a lightweight hand and a dial face of your choice — cardboard, foam board, or a 3D‑printed disc work perfectly. The stepper motor shaft fits a standard 5mm hub, so any craft hand you attach will sweep smoothly.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the clock keep time after I power off?\u003c\/summary\u003e\u003cp\u003eYes. The DS3231 module has a tiny coin cell backup that maintains time for years. When you reconnect the 9V battery to the Arduino, the clock instantly knows the correct time — no resetting needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this kit be used for a school science exhibition?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The smooth sweep movement is visually striking and clearly demonstrates how digital electronics can replace mechanical clocks. Pair it with a large printed dial and a clear explanation of I2C and stepper motor driver logic for an A‑grade exhibit.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003e28BYJ-48 stepper rotates a clock hand in 60 steps per minute driven by DS3231 RTC timing.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e28BYJ-48 Stepper\u003c\/li\u003e\n    \u003cli\u003eULN2003 Driver\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/ds3231-real-time-clock-module-i2c-rtc-with-battery-backup\"\u003eDS3231 RTC\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e4.7kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Clock Sweep Kit with Arduino Uno + Stepper Motor across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Clock Sweep Kit with Arduino Uno + Stepper Motor?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Clock Sweep Kit with Arduino Uno + Stepper Motor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Clock Sweep Kit with Arduino Uno + Stepper Motor includes all components needed: Arduino Uno R3, 28BYJ-48 Stepper, ULN2003 Driver, DS3231 RTC, 4.7kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Clock Sweep Kit with Arduino Uno + Stepper Motor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. 28BYJ-48 stepper rotates a clock hand in 60 steps per minute driven by DS3231 RTC timing. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Clock Sweep Kit with Arduino Uno + Stepper Motor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Clock Sweep Kit with Arduino Uno + Stepper Motor is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455240298861,"sku":"CDN-KIT-0043-CL","price":980.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455240331629,"sku":"CDN-KIT-0043-R3","price":2600.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455240364397,"sku":"CDN-KIT-0043-R4","price":2900.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/clock-sweep-kit-with-arduino-uno-stepper-motor-3149678.png?v=1790779267"},{"product_id":"kit-dc-motor-speed-controller","title":"Motor Speed Controller Kit with Arduino Uno + PWM","description":"\u003cp\u003eMotor Speed Controller Kit with Arduino Uno + PWM — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eMaster Motor Speed Control with Arduino Uno: Build a PWM Controller with Potentiometer and LED Bar\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5–15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e PWM and Motor Control\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine turning a knob and watching a motor instantly respond—spin faster, slow down, or stop—while a row of LEDs lights up to match the speed. This kit puts you in direct control of motion. You’ll build a complete variable-speed motor controller using real components found in robots and automation, with Arduino Uno as the brain and an L298N driver handling the power. It’s precise, visual, and deeply satisfying to see your code come alive in rotating wheels and glowing LEDs.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble a breadboard circuit where the potentiometer acts as a throttle. The Arduino reads its position, generates a PWM signal, and commands the L298N to spin the TT gear motor at exactly the speed you set. Five LEDs form a bar graph that scales from off to fully lit as you turn the knob from minimum to maximum speed—an intuitive dashboard for your first motion-control project.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eGenerate and fine-tune PWM signals using Arduino Uno’s analogWrite function\u003c\/li\u003e\n  \u003cli\u003eRead analog values from a potentiometer and map them to motor speed ranges\u003c\/li\u003e\n  \u003cli\u003eDrive a DC motor safely with an L298N H-bridge, including flyback diode protection\u003c\/li\u003e\n  \u003cli\u003eCreate a real-time LED speed indicator by scaling output pins with digital logic\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eL298N Driver\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTT Gear Motor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Potentiometer\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm LED\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1N4007 Diode\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eThis kit fits naturally into CBSE Class 11–12 physics and computer science practicals, B.Tech ECE\/EEE introductory labs, ATL Tinkering Labs, and hobbyist workbenches across India. Students from Grade 5 onward can follow the visual LED feedback and gain immediate confidence in controlling real hardware. It’s also a strong foundation for Smart India Hackathon prototypes that need motor control and sensor integration.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to chat with the AI companion trained specifically for this kit. It troubleshoots wiring, code, and component behaviour instantly. You can also message us on WhatsApp for human backup during Indian hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need prior programming or electronics experience?\u003c\/summary\u003e\u003cp\u003eNone. The AI guide explains every line of code and circuit connection in plain language. The Arduino comes with a pre-written sketch, and you simply assemble, upload (instructions provided), and start turning the knob.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this kit without a computer, just with a mobile phone?\u003c\/summary\u003e\u003cp\u003eTo upload the code initially, you’ll need a computer once. After that, the Arduino runs independently from a 9V battery. The AI companion and all instructions can be accessed from any smartphone.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat if I want to add more motors or sensors later?\u003c\/summary\u003e\u003cp\u003eThe L298N can drive two motors, and the breadboard has plenty of room. The AI companion will suggest extensions—like adding an ultrasonic sensor to create a speed-reactive obstacle-avoiding robot—all using the same kit parts as a base.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003ePotentiometer controls motor speed via PWM through L298N. LED bar shows speed level.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/l298n-motor-driver-module-specs-pinout-projects-compoden\"\u003eL298N Driver\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/tt-gear-motor-high-torque-dc-motor-for-arduino-robotics\"\u003eTT Gear Motor\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e10kΩ Potentiometer\u003c\/li\u003e\n    \u003cli\u003e\n5mm LED x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/diode-variety-pack-1n4007-1n4148-1n5819-zener-assortment\"\u003e1N4007 Diode\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Motor Speed Controller Kit with Arduino Uno + PWM across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 3-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Motor Speed Controller Kit with Arduino Uno + PWM?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Motor Speed Controller Kit with Arduino Uno + PWM?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Motor Speed Controller Kit with Arduino Uno + PWM includes all components needed: Arduino Uno R3, L298N Driver, TT Gear Motor, 10kΩ Potentiometer, 5mm LED and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Motor Speed Controller Kit with Arduino Uno + PWM?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Potentiometer controls motor speed via PWM through L298N. LED bar shows speed level. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Motor Speed Controller Kit with Arduino Uno + PWM online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Motor Speed Controller Kit with Arduino Uno + PWM is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 3-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455240397165,"sku":"CDN-KIT-0044-CL","price":630.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455240429933,"sku":"CDN-KIT-0044-R3","price":2250.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455240462701,"sku":"CDN-KIT-0044-R4","price":2550.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/motor-speed-controller-kit-with-arduino-uno-pwm-2332246.png?v=1790779267"},{"product_id":"kit-servo-tail-wagger","title":"Tail Wagger Kit with Arduino Uno + Servo","description":"\u003cp\u003eTail Wagger Kit with Arduino Uno + Servo — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eTail Wagger Kit — Build a Wagging Tail Robot with Arduino Uno \u0026amp; Servo\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Servo Motion Control\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003ePress the button and watch a tail wag back and forth — you've just built your first motion robot. This kit introduces the SG90 servo motor, the Arduino Uno R3, and the simple logic of button-triggered movement. Perfect for young makers taking their first step into robotics.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA servo-powered tail that swings left and right on command. The tail arm attaches to the SG90 servo horn, and the Arduino code makes it sweep smoothly when you press the tactile button. You'll have a working mechanical movement project in under two hours.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eControlling a servo motor with Arduino PWM signals\u003c\/li\u003e\n  \u003cli\u003eReading digital input from a tactile button and debouncing it\u003c\/li\u003e\n  \u003cli\u003eWiring a breadboard circuit with 5V and GND rails correctly\u003c\/li\u003e\n  \u003cli\u003eUploading and modifying Arduino sketches to change movement speed or angle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSG90 Servo\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTactile Button\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eThis kit is designed for young learners aged 5-15 exploring electronics for the first time, including ATL Tinkering Lab students, CBSE Class 5-10 science project enthusiasts, and weekend hobby clubs. It's a perfect first Arduino project for parents and educators introducing robotics in schools across India.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eThe QR code on the box connects you to our AI companion with step-by-step guidance for this exact kit; you can also message us on WhatsApp for a quick reply.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this kit safe for young children?\u003c\/summary\u003e\u003cp\u003eYes, all components operate at low voltage (5V from Arduino, 9V battery) and there is no soldering required. Adult supervision recommended for the battery snap connection.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat tools will I need?\u003c\/summary\u003e\u003cp\u003eOnly a computer with a USB port to upload code to the Arduino. No soldering or extra tools needed; everything else is in the box.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I modify the code to do something else?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The AI companion will show you how to change the sweep angle and speed, or you can experiment with making the tail wag only while the button is held.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eSG90 servo sweeps a tail arm back and forth when button held. Fun beginner servo project.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/sg90-servo-motor-9g-micro-servo-for-robotics-arduino\"\u003eSG90 Servo\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/tactile-button-pack-10x-6mm-switches-with-colored-caps-compoden\"\u003eTactile Button\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Tail Wagger Kit with Arduino Uno + Servo across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Tail Wagger Kit with Arduino Uno + Servo?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Tail Wagger Kit with Arduino Uno + Servo?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Tail Wagger Kit with Arduino Uno + Servo includes all components needed: Arduino Uno R3, SG90 Servo, Tactile Button, 10kΩ Resistors, 400-pt Breadboard and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Tail Wagger Kit with Arduino Uno + Servo?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. SG90 servo sweeps a tail arm back and forth when button held. Fun beginner servo project. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Tail Wagger Kit with Arduino Uno + Servo online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Tail Wagger Kit with Arduino Uno + Servo is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455242133869,"sku":"CDN-KIT-0067-CL","price":790.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455242166637,"sku":"CDN-KIT-0067-R3","price":2410.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455242199405,"sku":"CDN-KIT-0067-R4","price":2710.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/tail-wagger-kit-with-arduino-uno-servo-6399326.png?v=1790779208"},{"product_id":"auto-pencil-sharpener-with-arduino-uno-timed-motor-control-kit","title":"Auto Pencil Sharpener with Arduino Uno - Timed Motor Control Kit","description":"\u003cp\u003eAuto Pencil Sharpener with Arduino Uno - Timed Motor Control Kit — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eSharpener Kit: Build a Timed Automatic Pencil Sharpener with Arduino Uno and DC Motor\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Motor control with timed activation\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eWatch a simple button press transform into a precise 3-second burst - exactly what you need to drive a gear-reduced sharpening drum. This kit turns that idea into a real circuit, introducing you to motor drivers, timing logic, and push-button inputs without any prior experience. Whether it's a classroom demo, a tinkering lab project, or just the thrill of making something useful, you'll build a smart sharpener that never overspins.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou'll construct a push-button controlled automatic sharpener. Press the tactile button and the DC motor spins for a fixed 3-second window, turning a sharpening drum (you can repurpose a manual sharpener or attach a simple drum - the electronics are the core). Once you've laid out the breadboard and uploaded the code, you'll see how a real-world timing task works in robotics and automation.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInterface a DC motor with the L298N driver and Arduino Uno\u003c\/li\u003e\n  \u003cli\u003eWrite Arduino code to trigger a timed output on a button press\u003c\/li\u003e\n  \u003cli\u003eUse a 9V battery to power a motor circuit safely\u003c\/li\u003e\n  \u003cli\u003eRead and debounce a tactile button to prevent false triggers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDC Motor 5V\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eL298N Driver\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTactile Button\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1N4007 Diode\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003ePerfect for CBSE Class 6-10 students exploring automation through the ATL Tinkering Lab initiative, young hobbyists aged 5-15 tackling their first motor project, and even B.Tech ECE\/EEE freshers who want a quick hands-on intro to motor drivers. If you're preparing for a Smart India Hackathon prototype or a school science exhibition demo, this kit gives you a reliable timed-action module you can later modify for conveyors, feeders, or custom dispensers.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code on the box to access the AI companion that walks you through every wiring step and the Arduino sketch. You can also ping us on WhatsApp - a real human will jump in within hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the kit include the sharpening drum?\u003c\/summary\u003e\u003cp\u003eThe electronics are ready to drive any small 5V DC motor with a gear-reduced drum. A common manual pencil sharpener can be attached to the motor shaft, or you can 3D-print a drum. The kit gives you the timed control; the mechanical part is a fun customization activity.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I change the 3-second timing?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The Arduino code is open and commented. You can adjust the delay value in milliseconds to set any duration you need - 1 second, 10 seconds, or even make it run until a second button stops it.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs any soldering or special tool needed?\u003c\/summary\u003e\u003cp\u003eNone. Everything plugs into the breadboard with jumper wires. A small Phillips screwdriver to connect the motor to the L298N is the only tool you might need, and it's not soldering.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eButton activates DC motor driving a gear-reduced sharpening drum for timed 3 seconds.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eDC Motor 5V\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/l298n-motor-driver-module-specs-pinout-projects-compoden\"\u003eL298N Driver\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/tactile-button-pack-10x-6mm-switches-with-colored-caps-compoden\"\u003eTactile Button\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/diode-variety-pack-1n4007-1n4148-1n5819-zener-assortment\"\u003e1N4007 Diode\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Auto Pencil Sharpener with Arduino Uno - Timed Motor Control Kit across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Auto Pencil Sharpener with Arduino Uno - Timed Motor Control Kit?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Sharpener Kit with Arduino Uno + Motor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Sharpener Kit with Arduino Uno + Motor includes all components needed: Arduino Uno R3, DC Motor 5V, L298N Driver, Tactile Button, 1N4007 Diode and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Sharpener Kit with Arduino Uno + Motor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Button activates DC motor driving a gear-reduced sharpening drum for timed 3 seconds. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Sharpener Kit with Arduino Uno + Motor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Sharpener Kit with Arduino Uno + Motor is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455251636589,"sku":"CDN-KIT-0077-CL","price":650.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455251669357,"sku":"CDN-KIT-0077-R3","price":2270.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455251702125,"sku":"CDN-KIT-0077-R4","price":2570.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/auto-pencil-sharpener-with-arduino-uno-timed-motor-control-kit-5790256.png?v=1790779207"},{"product_id":"kit-musical-crank-organ-box","title":"Organ Box Kit with Arduino Uno + Servo","description":"\u003cp\u003eOrgan Box Kit with Arduino Uno + Servo — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eOrgan Box Kit with Arduino Uno – Build Your Own Hand-Crank Music Machine\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Counting and music synthesis with Arduino\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eTurn a simple crank and watch your room fill with a custom melody. This Organ Box Kit uses a magnet on the hand crank and an A3144 Hall effect sensor to count rotations; the Arduino Uno then fires a passive buzzer at just the right moment to play musical notes. It’s a delightful way for young makers to blend motion, magnetism, and code into a real working music box.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA portable, battery-powered music box that plays a tune every time you turn the crank — faster cranking speeds up the melody, exactly like a street organ. You’ll mount the crank and magnet, wire the sensor and buzzer, and load the Arduino with a tune you can change anytime. Once complete, the whole project can sit on a shelf, ready to charm anyone who walks by.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow a Hall Effect sensor detects a magnetic field and converts motion into electrical pulses\u003c\/li\u003e\n  \u003cli\u003eProgramming Arduino to count pulses from a sensor using digital interrupts\u003c\/li\u003e\n  \u003cli\u003eGenerating precise musical notes with the tone() function and a passive buzzer\u003c\/li\u003e\n  \u003cli\u003eBuilding a real-world electronics project on a breadboard without soldering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eA3144 Hall Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePassive Buzzer\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e100nF Caps\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eKids aged 5-15 and their parents or mentors — especially inside India’s ATL Tinkering Labs, CBSE Class 6–10 STEM classrooms, and home hobbyist setups. No prior coding or electronics experience is needed; the circuit snaps together on a breadboard, and the Arduino code is pre-written and easy to tweak. It’s a perfect project for first-time makers who love music and want to see how technology can turn motion into melody.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code on the box to launch the AI companion, which walks you through every step — from wiring the Hall sensor to uploading the code. If you prefer a human touch, our WhatsApp support is also active within business hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I change the tune that the organ box plays?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The Arduino sketch is fully editable; you can adjust the note sequence and tempo to create your own melodies, or even swap in holiday songs and popular tunes from the included code library.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need any extra tools or a computer?\u003c\/summary\u003e\u003cp\u003eYes, you’ll need a computer (Windows, Mac, or Linux) to upload the code via USB, but no special tools are required. The Arduino Uno connects with a standard USB cable (not included), and everything else is in the kit.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does the Hall sensor know the crank is turning?\u003c\/summary\u003e\u003cp\u003eA small magnet attached to the crank sweeps past the A3144 sensor with each rotation. The sensor detects the magnetic field change and sends a digital pulse to the Arduino, which counts those pulses to trigger the next note.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eHall sensor on a hand crank counts rotations and plays notes via passive buzzer at musical intervals.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eA3144 Hall Sensor\u003c\/li\u003e\n    \u003cli\u003ePassive Buzzer\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/100nf-ceramic-capacitor-pack-50-pieces-for-arduino-diy\"\u003e100nF Caps\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Organ Box Kit with Arduino Uno + Servo across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Organ Box Kit with Arduino Uno + Servo?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Organ Box Kit with Arduino Uno + Servo?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Organ Box Kit with Arduino Uno + Servo includes all components needed: Arduino Uno R3, A3144 Hall Sensor, Passive Buzzer, 10kΩ Resistors, 100nF Caps and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Organ Box Kit with Arduino Uno + Servo?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Hall sensor on a hand crank counts rotations and plays notes via passive buzzer at musical intervals. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Organ Box Kit with Arduino Uno + Servo online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Organ Box Kit with Arduino Uno + Servo is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455252980077,"sku":"CDN-KIT-0078-CL","price":410.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455253012845,"sku":"CDN-KIT-0078-R3","price":2030.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455253045613,"sku":"CDN-KIT-0078-R4","price":2330.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/organ-box-kit-with-arduino-uno-servo-9370036.png?v=1790779207"},{"product_id":"kit-motorised-pencil-sharpener-v9","title":"Motorised Pencil Sharpener Kit with Arduino Uno + L298N Driver","description":"\u003cp\u003eMotorised Pencil Sharpener Kit with Arduino Uno + L298N Driver — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild a Motorised Pencil Sharpener with Arduino \u0026amp; a 3-Second Timer\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Motor control using Arduino \u0026amp; L298N driver\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003ePress a tactile button and a DC motor spins for exactly 3 seconds — then stops cleanly. That’s the core of every electric pencil sharpener, and this kit lets young makers build that exact timing circuit with an Arduino Uno, an L298N motor driver, and basic components. No manual cranking, no guesswork: just one button press for a perfectly timed sharpening burst. It’s a gentle introduction to robotics, motor control, and real-world programming logic.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble a complete motorised sharpener timer on a breadboard: connect the Arduino, driver, motor, and button, then upload code that reads the button press and runs the motor for a preset 3-second window. The motor shaft acts as the drive hub for a sharpening drum — you can attach a small wheel or a foam cylinder to visualise how the mechanism would work. When you press the button, the motor engages, holds steady for three seconds, and disengages, ready for the next pencil.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInterface a DC motor with Arduino using an L298N motor driver and understand H‑bridge logic\u003c\/li\u003e\n  \u003cli\u003eRead a tactile button input and implement software debouncing for stable triggering\u003c\/li\u003e\n  \u003cli\u003eWrite a timer function that runs the motor for exactly 3 seconds and then stops it immediately\u003c\/li\u003e\n  \u003cli\u003eUse diodes and resistors correctly for circuit protection and pull‑up\/pull‑down configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDC Motor 5V\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eL298N Driver\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTactile Button\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1N4007 Diode\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for CBSE Class 11–12 students exploring microcontroller projects in physics or computer science, B.Tech ECE\/EEE first‑year learners tackling their first embedded motor control assignment, ATL Tinkering Lab innovators, and kids aged 5–15 building under adult guidance. It also fits perfectly into Smart India Hackathon junior themes and introductory workshops at IIT, NIT, VIT, or BITS campuses.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code inside the box to launch the AI companion instantly. It walks you through wiring, code, and troubleshooting. You can also send a photo via WhatsApp and our team will guide you back on track.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I change the 3‑second timer to a different duration?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The Arduino sketch is open and commented, so you can modify the delay value in the code to any length you need – for testing, demonstrations, or even a longer sharpening cycle.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this kit include a real pencil sharpener blade?\u003c\/summary\u003e\u003cp\u003eNo. The kit focuses on the motor control electronics. You can attach a small wheel or foam disc to the motor shaft to simulate the sharpening drum. No cutting parts are included, keeping the project safe for young builders.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs soldering required?\u003c\/summary\u003e\u003cp\u003eNot at all. All connections are made on the included 400‑point breadboard using male‑to‑male jumper wires. The entire circuit can be assembled and modified without any soldering.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eButton activates DC motor driving a gear-reduced sharpening drum for timed 3 seconds.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/l293d-motor-driver-shield-for-arduino-drive-dc-stepper-motors\"\u003eDC Motor 5V\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/l298n-motor-driver-module-specs-pinout-projects-compoden\"\u003eL298N Driver\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/tactile-button-pack-10x-6mm-switches-with-colored-caps-compoden\"\u003eTactile Button\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/diode-variety-pack-1n4007-1n4148-1n5819-zener-assortment\"\u003e1N4007 Diode\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Motorised Pencil Sharpener Kit with Arduino Uno + L298N Driver?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Motorised Pencil Sharpener Kit with Arduino Uno + L298N Driver includes all components needed: Arduino Uno R3, DC Motor 5V, L298N Driver, Tactile Button, 1N4007 Diode and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Motorised Pencil Sharpener Kit with Arduino Uno + L298N Driver?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Button activates DC motor driving a gear-reduced sharpening drum for timed 3 seconds. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Motorised Pencil Sharpener Kit with Arduino Uno + L298N Driver online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Motorised Pencil Sharpener Kit with Arduino Uno + L298N Driver is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53455268151661,"sku":"CDN-KIT-0093","price":930.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/motorised-pencil-sharpener-variant-9-9622768.png?v=1790779147"},{"product_id":"kit-musical-crank-organ-box-v10","title":"Hand-Cranked Music Box Kit with Arduino Uno + A3144 Hall Sensor","description":"\u003ch1\u003eBuild Your Own Hand-Cranked Music Box with Arduino – Musical Crank Organ Kit for Kids\u003c\/h1\u003e\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor Interfacing \u0026amp; Musical Programming\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003eSpin a hand crank and hear musical notes flow — each rotation of the crank is sensed by a Hall sensor, counted by an Arduino, and transformed into a tone from a passive buzzer. This kit turns a simple motion into a working musical instrument, teaching the core concepts of sensor input, signal processing, and real-time sound generation. Perfect for curious kids and beginner makers who want to see, hear, and play with electronics right away.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble a compact organ box where every turn of the crank produces a musical note. As you spin faster or slower, the Arduino maps rotation speed to note frequency, letting you improvise melodies at your own pace. The final project is a tactile music maker — part mechanical crank, part digital instrument — that lights up a child’s eyes and demystifies how sensors and code create interactive gadgets.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow Hall effect sensors detect magnetic fields and count rotations without physical contact\u003c\/li\u003e\n  \u003cli\u003eProgramming an Arduino Uno to read digital pulses and generate PWM audio signals for a passive buzzer\u003c\/li\u003e\n  \u003cli\u003eTranslating rotation speed into musical intervals and mapping them to specific notes in code\u003c\/li\u003e\n  \u003cli\u003eBuilding a stable, reusable circuit on a breadboard using resistors and capacitors for debouncing and noise filtering\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eA3144 Hall Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePassive Buzzer\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e100nF Caps\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eThis kit is built for CBSE Class 5-10 students exploring sensor-based projects, ATL Tinkering Lab mentors running introductory Arduino workshops, and parents seeking a hands-on, screen-balanced activity. B.Tech ECE\/EEE freshers at NITs or VIT find it a gentle sandbox to experiment with signal mapping before tackling heavier instruments. The crank-organ interplay also fits perfectly into school science exhibitions and hobbyist maker weekends.\u003c\/p\u003e\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to access the AI companion trained on this exact Musical Crank Organ Kit. It offers real-time guidance, and you can message us on WhatsApp for personal help if needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this kit require soldering?\u003c\/summary\u003e\u003cp\u003eNo soldering at all. Everything plugs into the breadboard with jumper wires, making the build completely solder-free, reusable, and safe for young children.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I create different tunes by changing the crank speed?\u003c\/summary\u003e\u003cp\u003eYes, the code maps rotation speed to note frequency. Once the basic organ works, you can modify the mapping to play scales, simple songs, or even experimental sound effects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the kit suitable for a 5-year-old with no prior electronics experience?\u003c\/summary\u003e\u003cp\u003eThe design targets ages 5+ with adult supervision. The step-by-step AI companion and clear breadboard layout make it friendly for absolute beginners, turning assembly into a guided play session.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eHall sensor on a hand crank counts rotations and plays notes via passive buzzer at musical intervals.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/a3144-hall-effect-sensor-unipolar-switch-for-magnetic-sensing\"\u003eA3144 Hall Sensor\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/passive-buzzer-module-for-arduino-raspberry-pi-3-5v-piezo-buzzer\"\u003ePassive Buzzer\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/capacitor-variety-pack-6-values-100nf-to-470uf-30-pieces\"\u003e100nF Caps\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Hand-Cranked Music Box Kit with Arduino Uno + A3144 Hall Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Hand-Cranked Music Box Kit with Arduino Uno + A3144 Hall Sensor includes all components needed: Arduino Uno R3, A3144 Hall Sensor, Passive Buzzer, 10kΩ Resistors, 100nF Caps and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Hand-Cranked Music Box Kit with Arduino Uno + A3144 Hall Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Hall sensor on a hand crank counts rotations and plays notes via passive buzzer at musical intervals. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Hand-Cranked Music Box Kit with Arduino Uno + A3144 Hall Sensor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Hand-Cranked Music Box Kit with Arduino Uno + A3144 Hall Sensor is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53455269331309,"sku":"CDN-KIT-0094","price":440.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/musical-crank-organ-box-variant-10-9881554.png?v=1790779147"},{"product_id":"kit-digital-thermometer-with-led-alert","title":"Thermometer Alert Kit with Arduino Uno + LED","description":"\u003cp\u003eThermometer Alert Kit with Arduino Uno + LED — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild Your First Digital Thermometer With Arduino Uno and Instant Visual Alerts\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor-based embedded logic\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eFrom a sweltering summer day to a science fair challenge, understanding temperature is a perfect first sensor project. This kit equips you to read real-time ambient heat with an LM35, display it on a crisp LCD, and trigger a red LED the moment a chosen threshold is crossed — exactly the kind of functional system that sparks deeper curiosity in weather monitoring and environmental sensing.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou assemble a fully working thermometer that shows current temperature in Celsius on a 16x2 LCD. With onboard tactile buttons, you define a heat limit. Once the temperature rises past that point, the red LED glows unmistakably while the green LED stays lit under normal conditions — a practical alert system ready for classrooms, server rooms, or a simple home science setup.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow to read analog voltage from an LM35 and convert it into meaningful temperature values\u003c\/li\u003e\n  \u003cli\u003eHow to connect and program a 16x2 LCD through an I2C backpack, reducing wiring complexity\u003c\/li\u003e\n  \u003cli\u003eUsing conditional statements in Arduino C to compare sensor data and drive outputs like LEDs\u003c\/li\u003e\n  \u003cli\u003eImplementing user input via tactile buttons to adjust settings on the go\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM35 Temp Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16x2 LCD HD44780\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI2C LCD Backpack\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Red LED\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Green LED\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTactile Button\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eYoung makers aged 8–15 diving into their first real sensor project, including CBSE Class 7–10 students and ATL Tinkering Lab participants. It’s also a ready-to-go STEM activity for teachers conducting weather-awareness workshops or parents looking for a structured, no-guesswork introduction to Arduino and environmental monitoring.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to open the AI companion that walks you through wiring and code; you can also send a photo on WhatsApp for quick human guidance if needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this kit be used outdoors to track weather?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The LM35 works reliably in ambient air. Just shield it from direct rain and extreme humidity, and you’ll have a solid weather-logging base.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat threshold temperature can I set?\u003c\/summary\u003e\u003cp\u003eThe two buttons let you increase or decrease the setpoint in 1°C steps, displayed instantly on the LCD. You can define any threshold from room temperature to local summer highs.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this suitable for a school science exhibition?\u003c\/summary\u003e\u003cp\u003eYes, it demonstrates sensor integration, visual output, and real-time decision logic — a complete, impressive project that fits CBSE topics on heat and measurement.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eLM35 reads temperature and shows it on LCD. Red LED fires above set threshold. First sensor build.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eLM35 Temp Sensor\u003c\/li\u003e\n    \u003cli\u003e16x2 LCD HD44780\u003c\/li\u003e\n    \u003cli\u003eI2C LCD Backpack\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/led-assorted-pack-5mm-red-green-blue-yellow-white-compoden\"\u003e5mm Red LED\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n5mm Green LED x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/tactile-button-pack-10x-6mm-switches-with-colored-caps-compoden\"\u003eTactile Button\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Thermometer Alert Kit with Arduino Uno + LED across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Thermometer Alert Kit with Arduino Uno + LED?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Thermometer Alert Kit with Arduino Uno + LED?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Thermometer Alert Kit with Arduino Uno + LED includes all components needed: Arduino Uno R3, LM35 Temp Sensor, 16, I2C LCD Backpack, 5mm Red LED and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Thermometer Alert Kit with Arduino Uno + LED?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. LM35 reads temperature and shows it on LCD. Red LED fires above set threshold. First sensor build. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Thermometer Alert Kit with Arduino Uno + LED online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Thermometer Alert Kit with Arduino Uno + LED is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455275426157,"sku":"CDN-KIT-0101-CL","price":750.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455275458925,"sku":"CDN-KIT-0101-R3","price":2370.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455275491693,"sku":"CDN-KIT-0101-R4","price":2670.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/thermometer-alert-kit-with-arduino-uno-led-3813017.png?v=1790779147"},{"product_id":"kit-rain-alert-system","title":"Rain Alert Kit with Arduino Uno + Sensor","description":"\u003cp\u003eRain Alert Kit with Arduino Uno + Sensor — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eRain Alert Kit with Arduino Uno + Sensor – Your Own Rain Detection Alarm\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Analog threshold reading\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eHave you ever wanted to know the instant rain starts without looking outside? This kit lets you build a practical rain detection circuit that triggers a buzzer alert the moment moisture lands on the sensor probe. Read the analog value from the rain sensor, set a threshold, and watch your Arduino Uno respond with sound and light — a perfect first step into weather monitoring.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou'll assemble a complete circuit on a breadboard where the rain sensor’s moisture-sensitive plate sends an analog signal to the Arduino. When water drops touch the probe, the value drops below a set threshold, and the system activates an active buzzer and two blue LEDs to give a clear visual and audio rain alert. It’s a working alarm you can place near a window or balcony.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eRead analog input from a moisture sensor and display it in the serial monitor\u003c\/li\u003e\n  \u003cli\u003eSet an if-else condition to compare sensor readings against a threshold\u003c\/li\u003e\n  \u003cli\u003eControl an active buzzer to produce an audible alert\u003c\/li\u003e\n  \u003cli\u003eBuild a stable breadboard circuit with LEDs and current-limiting resistors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRain Sensor Module\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eActive Buzzer\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Blue LED\u003c\/td\u003e\n\u003ctd\u003ex2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003ex5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003ex5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003ex20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eThis beginner-friendly weather project kit fits perfectly into CBSE Class 11-12 sensor‑based practicals, B.Tech ECE\/EEE first‑year lab exercises, and ATL Tinkering Labs running environmental monitoring workshops. It’s also simple enough for a curious 10‑year‑old to build with a parent — making it a popular choice at Smart India Hackathon pre‑event bootcamps and VIT\/NIT club activities.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code on the box to chat with your AI companion, which has step-by-step guidance for exactly this rain alert project. You can also WhatsApp our support team for a quick response.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan the sensor detect light drizzle or only heavy rain?\u003c\/summary\u003e\u003cp\u003eThe rain sensor probe reacts to any moisture. A light drizzle is enough to trigger the alarm; you can adjust the threshold in the Arduino code to set the desired sensitivity.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need a separate USB cable for programming?\u003c\/summary\u003e\u003cp\u003eThe kit does not include the Arduino USB A-B cable. You can use any standard USB A-B cable (commonly used with printers) to upload code from your computer.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I keep the rain sensor outdoors permanently?\u003c\/summary\u003e\u003cp\u003eThe sensor module is not fully waterproof for continuous outdoor use. We recommend placing it under a covered balcony or bringing it indoors after your experiment to avoid corrosion over time.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eRain sensor detects moisture on its probe plate and triggers a buzzer. Teaches analog threshold reading.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eRain Sensor Module\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/piezo-buzzer-module-for-arduino-diy-projects-5v-active-buzzer\"\u003eActive Buzzer\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n5mm Blue LED x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Rain Alert Kit with Arduino Uno + Sensor across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Rain Alert Kit with Arduino Uno + Sensor?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Rain Alert Kit with Arduino Uno + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Rain Alert Kit with Arduino Uno + Sensor includes all components needed: Arduino Uno R3, Rain Sensor Module, Active Buzzer, 5mm Blue LED, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Rain Alert Kit with Arduino Uno + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Rain sensor detects moisture on its probe plate and triggers a buzzer. Teaches analog threshold reading. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Rain Alert Kit with Arduino Uno + Sensor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Rain Alert Kit with Arduino Uno + Sensor is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455276867949,"sku":"CDN-KIT-0102-CL","price":460.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455276900717,"sku":"CDN-KIT-0102-R3","price":2080.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455276933485,"sku":"CDN-KIT-0102-R4","price":2380.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/rain-alert-kit-with-arduino-uno-sensor-2983417.png?v=1790779147"},{"product_id":"kit-wind-direction-indicator","title":"Wind Direction Kit with Arduino Uno + Servo","description":"\u003cp\u003eWind Direction Kit with Arduino Uno + Servo — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild a Wind Direction Compass with Arduino Uno — Detects N, S, E, W Using Reed Switches and LEDs\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 3-4 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor interfacing\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eTurn any wind vane into a digital compass rose. A small magnet on the vane triggers one of eight reed switches arranged in a circle, lighting up the LED for North, South, East, or West. This kit gives you the complete detection and display circuit — just add a homemade vane and you have a working weather station sensor ideal for school science projects, environmental monitoring, and CBSE physics practicals.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA tabletop or pole-mounted wind direction indicator that reads the orientation of a magnet-equipped vane. Using the included Arduino Uno and pre-wired reed switches, you’ll assemble a compass rose circuit where each cardinal direction lights a distinct LED. When the wind shifts, the active LED changes instantly — a tangible way to see wind patterns without a screen.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow reed switches detect magnetic fields and act as non-contact position sensors\u003c\/li\u003e\n  \u003cli\u003eWiring eight digital inputs to Arduino and debouncing real-world sensor signals\u003c\/li\u003e\n  \u003cli\u003eCoding logic to map switch states to four cardinal directions with LED output\u003c\/li\u003e\n  \u003cli\u003ePrototyping a weather instrument on a breadboard and planning an outdoor enclosure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eReed Switch\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm LED Assorted\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for CBSE Class 11–12 students preparing physics investigatory projects on wind measurement, ATL Tinkering Lab mentors running sensor workshops, and young makers exploring environmental electronics. B.Tech ECE\/EEE first-year students can use it as a quick prototyping exercise to understand digital input handling and practical reed switch behavior. It also fits Smart India Hackathon ideas around agriculture or disaster monitoring where local wind data matters.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eOur AI companion walks you through each connection and the Arduino code; you can also reach us on WhatsApp for a quick troubleshooting tip.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need a wind vane with this kit?\u003c\/summary\u003e\u003cp\u003eThe kit provides the detection and display electronics. You can build a simple vane from cardboard or a 3D-printed arm with a small magnet attached to the pivot; the reed switches will sense its orientation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this be used outdoors permanently?\u003c\/summary\u003e\u003cp\u003eThe breadboard circuit is not weatherproof. For long-term outdoor use, enclose the assembled circuitry in a sealed box with a transparent window for the LEDs, and mount the vane above it.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the Arduino code included?\u003c\/summary\u003e\u003cp\u003eYes. The AI build companion supplies the full sketch, explains the logic behind reading eight switches and driving four LEDs, and can help you modify the timing or add serial output.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eReed switches in a compass rose detect magnet on a wind vane to show N\/S\/E\/W direction on LEDs.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\nReed Switch x8\u003c\/li\u003e\n    \u003cli\u003e\n5mm LED Assorted x8\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x10\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x10\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x25\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Wind Direction Kit with Arduino Uno + Servo across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Wind Direction Kit with Arduino Uno + Servo?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Wind Direction Kit with Arduino Uno + Servo?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Wind Direction Kit with Arduino Uno + Servo includes all components needed: Arduino Uno R3, Reed Switch, 5mm LED Assorted, 220Ω Resistors, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Wind Direction Kit with Arduino Uno + Servo?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Reed switches in a compass rose detect magnet on a wind vane to show N\/S\/E\/W direction on LEDs. Estimated build time is 3-4 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Wind Direction Kit with Arduino Uno + Servo online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Wind Direction Kit with Arduino Uno + Servo is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455278309741,"sku":"CDN-KIT-0103-CL","price":490.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455278342509,"sku":"CDN-KIT-0103-R3","price":2110.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455278375277,"sku":"CDN-KIT-0103-R4","price":2410.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/wind-direction-kit-with-arduino-uno-servo-3317655.png?v=1790779146"},{"product_id":"frost-warning-kit-with-arduino-uno-and-buzzer","title":"Frost Warning Kit with Arduino Uno \u0026 Buzzer","description":"\u003cp\u003eFrost Warning Kit with Arduino Uno \u0026amp; Buzzer — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild a Frost Warning Alarm with Arduino Uno - Complete Beginner Kit\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Temperature sensing \u0026amp; alarm circuits\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eEvery winter, sudden frost can destroy tender plants and damage crops overnight. With this kit, you'll build a reliable outdoor temperature alarm that sounds a loud buzzer when the temperature drops below 4°C-the critical frost threshold. Using a waterproof DS18B20 probe and an Arduino Uno, you create a system that gives early warning, helping protect a garden or small farm from cold damage.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA real-time temperature monitoring station with an outdoor probe that displays readings on a bright 16x2 LCD indoors. When the probe senses temperatures falling toward freezing, an active buzzer instantly alerts you. The entire circuit runs on a 9V battery, so you can place the sensor exactly where you need it-outside a window, in a greenhouse, or on a terrace-without worrying about power sockets.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eConnecting and reading data from a DS18B20 one-wire digital temperature sensor\u003c\/li\u003e\n  \u003cli\u003eProgramming an Arduino Uno to monitor temperature and trigger a buzzer alarm\u003c\/li\u003e\n  \u003cli\u003eDisplaying sensor readings on an LCD using an I2C backpack for simpler wiring\u003c\/li\u003e\n  \u003cli\u003eBuilding a practical embedded system that solves a real-world environmental challenge\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDS18B20 Waterproof Probe\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eActive Buzzer\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16x2 LCD\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI2C Backpack\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e4.7kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003ex5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003ex5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003ex20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003ePerfect for school students working on STEM projects, CBSE Class 5-12 science fairs, ATL Tinkering Labs focusing on weather and agriculture, and young makers who want a first Arduino build that solves a real farming problem. B.Tech ECE\/EEE students can use it as a quick, hands-on sensor integration demo.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code on the box to launch the AI companion that walks you through every connection and line of code. You can also send us a WhatsApp message for direct help within minutes.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this kit detect frost for a small farm or garden?\u003c\/summary\u003e\u003cp\u003eYes. The waterproof probe can be placed outdoors and its cable extended up to several metres. When the Arduino reads a temperature below 4°C, the buzzer sounds loud enough to be heard from inside a home or greenhouse.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the buzzer stay on continuously in cold weather?\u003c\/summary\u003e\u003cp\u003eOut of the box, the active buzzer beeps continuously while temperature is below the threshold. If you prefer a periodic beep to save battery, the code can be easily modified by following the AI companion's guidance.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the DS18B20 really safe for rain and outdoor use?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The sensor is encased in a stainless steel tube with epoxy sealing, and the cable is waterproof. Just keep the Arduino and breadboard indoors or in a weatherproof box.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eDS18B20 waterproof probe measures outdoor temperature and triggers a buzzer below 4°C frost threshold.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eDS18B20 Waterproof Probe\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/piezo-buzzer-module-for-arduino-diy-projects-5v-active-buzzer\"\u003eActive Buzzer\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/16x2-lcd-display-module-16x2-character-blue-backlight\"\u003e16x2 LCD\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/i2c-backpack-pcf8574-i2c-adapter-for-lcd-displays\"\u003eI2C Backpack\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e4.7kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Frost Warning Kit with Arduino Uno \u0026amp; Buzzer across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Frost Warning Kit with Arduino Uno \u0026amp; Buzzer?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Frost Warning Kit with Arduino Uno + Buzzer?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Frost Warning Kit with Arduino Uno + Buzzer includes all components needed: Arduino Uno R3, DS18B20 Waterproof Probe, Active Buzzer, 16, I2C Backpack and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Frost Warning Kit with Arduino Uno + Buzzer?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. DS18B20 waterproof probe measures outdoor temperature and triggers a buzzer below 4°C frost threshold. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Frost Warning Kit with Arduino Uno + Buzzer online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Frost Warning Kit with Arduino Uno + Buzzer is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455281226093,"sku":"CDN-KIT-0105-CL","price":590.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455281258861,"sku":"CDN-KIT-0105-R3","price":2210.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455281291629,"sku":"CDN-KIT-0105-R4","price":2510.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/frost-warning-kit-with-arduino-uno-buzzer-2854760.png?v=1790779146"},{"product_id":"kit-humidity-comfort-display","title":"Humidity Display Kit with Arduino Uno + DHT22","description":"\u003cp\u003eHumidity Display Kit with Arduino Uno + DHT22 — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eArduino Uno DHT11 Humidity Display Kit: Build a Comfort Index Bar Graph on LCD\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor Data Visualization \u0026amp; Custom LCD Characters\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eNumbers on a screen tell only half the story. This kit lets you create a window into your room’s health — a compact device that reads temperature and humidity through a DHT11 sensor and translates them into a comfort index bar graph on a classic 16x2 LCD. The bar fills up like a battery, giving an instant, at-a-glance feel for whether the air is too dry, too humid, or just right. Perfect for a study desk, a nursery, or a first Arduino project that solves a real problem you can see and feel.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble a standalone environmental monitor that measures humidity and temperature every second, calculates a comfort score based on standard human comfort zones, and displays it as a growing bar made of custom LCD characters. The current temperature and humidity readings sit above the bar, all powered by a 9V battery so you can place it anywhere. When the room becomes uncomfortable, the bar visually alerts you — an early lesson in turning raw data into meaningful action.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWiring and reading accurate humidity and temperature data from a DHT11 digital sensor\u003c\/li\u003e\n  \u003cli\u003eControlling a 16x2 character LCD via an I2C backpack to save Arduino pins\u003c\/li\u003e\n  \u003cli\u003eDesigning and storing custom characters in the LCD’s memory to create bar graph segments\u003c\/li\u003e\n  \u003cli\u003eConverting analog comfort values into a dynamic visual scale with conditional logic\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDHT11 Temperature \u0026amp; Humidity Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16x2 Character LCD\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI2C Backpack Module\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistor\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-point Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMale-to-Male Jumper Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap Connector\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for CBSE Class 11-12 learners bringing physics concepts to life, B.Tech ECE first-years tackling their first sensor integration lab, and ATL Tinkering Lab students prototyping environmental awareness tools. Smart India Hackathon participants will find it a quick way to demonstrate climate data visualization. Even a 10-year-old maker can follow the AI companion’s voice to build confidence with electronics.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code on the box and the AI companion will guide you step by step. For extra help, reach us on WhatsApp — real engineers answer, not bots.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the DHT11 sensor accurate enough for a school science project?\u003c\/summary\u003e\u003cp\u003eYes, the DHT11 gives reliable readings within ±5% humidity and ±2°C, which is perfect for demonstrating environmental monitoring concepts in CBSE or B.Tech coursework.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I customize the comfort index thresholds?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The code is open and clearly commented. You can tweak the humidity and temperature boundaries to define your own comfort zones — from Mumbai to Manali.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need any soldering for this kit?\u003c\/summary\u003e\u003cp\u003eNo soldering required. All connections are made on the breadboard using the included jumper wires, making it safe and reusable for young builders.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eDHT11 shows temperature and humidity on LCD with a comfort index bar graph using custom characters.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9-in-1-arduino-sensor-kit-with-ultrasonic-pir-dht11-mq2-more\"\u003eDHT11 Sensor\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/16x2-lcd-display-module-16x2-character-blue-backlight\"\u003e16x2 LCD\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/i2c-backpack-pcf8574-i2c-adapter-for-lcd-displays\"\u003eI2C Backpack\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n10kΩ Resistors x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Humidity Display Kit with Arduino Uno + DHT22 across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Humidity Display Kit with Arduino Uno + DHT22?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Humidity Display Kit with Arduino Uno + DHT22?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Humidity Display Kit with Arduino Uno + DHT22 includes all components needed: Arduino Uno R3, DHT11 Sensor, 16, I2C Backpack, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Humidity Display Kit with Arduino Uno + DHT22?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. DHT11 shows temperature and humidity on LCD with a comfort index bar graph using custom characters. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Humidity Display Kit with Arduino Uno + DHT22 online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Humidity Display Kit with Arduino Uno + DHT22 is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455282602349,"sku":"CDN-KIT-0106-CL","price":490.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455282635117,"sku":"CDN-KIT-0106-R3","price":2110.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455282667885,"sku":"CDN-KIT-0106-R4","price":2410.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/humidity-display-kit-with-arduino-uno-dht22-1622921.png?v=1790779146"},{"product_id":"kit-air-quality-traffic-light","title":"AQ Light Kit with Arduino Nano + MQ135","description":"\u003cp\u003eAQ Light Kit with Arduino Nano + MQ135 — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eArduino Uno MQ135 Air Quality Kit: Build a Colour-Coded Gas Alert Light\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Air quality monitoring with Arduino\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eTransform a handful of components into a real-time gas detection tool that glows green, amber, or red based on what it senses. This kit puts a visual twist on environmental monitoring—perfect for school science projects, home experiments, or simply seeing the invisible particles around you. The MQ-135 sensor reads gas concentrations, the Arduino Uno processes the data, and the LEDs turn data into a clear, instant alert.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou'll wire the MQ-135 to an Arduino Uno, place three coloured LEDs on a breadboard, and upload a program that reads analog values. In fresh air, the green LED shines. As indoor pollutants like ammonia or benzene increase, the yellow LED takes over, and when levels cross a safety threshold, the red LED warns you. The result is a compact air quality beacon that reacts in real time—no complicated display needed.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eConnecting and calibrating the MQ-135 gas sensor\u003c\/li\u003e\n  \u003cli\u003eReading analog sensor values with Arduino Uno\u003c\/li\u003e\n  \u003cli\u003eUsing conditional logic (if-else) to drive colour-coded LEDs\u003c\/li\u003e\n  \u003cli\u003eUnderstanding air quality thresholds and environmental sensing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMQ-135 Gas Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Red LED\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Yellow LED\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Green LED\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIf you're a CBSE Class 9 or 10 student exploring sensor-based projects, an ATL tinkering lab facilitator looking for ready-made environmental kits, or a parent introducing your child to coding and air science, this kit is built for you. It aligns with CBSE practical syllabi, Inspire Award demonstrations, and informal maker learning. Even a curious 10-year-old can assemble it with the AI companion's guidance—no prior electronics experience needed.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to open the AI companion trained on this exact project. Ask a question—it explains wiring, code, and troubleshooting. You can also message us on WhatsApp or email for human support.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this kit without prior coding experience?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The kit includes a fully commented example sketch. The AI companion explains every line in simple language, so you learn coding as you build. No previous experience required.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I calibrate the MQ-135 sensor?\u003c\/summary\u003e\u003cp\u003eAfter a 24-hour preheat, you set threshold values in the code based on analog readings. The AI companion walks you through taking a fresh-air baseline and choosing levels for green, yellow, and red LEDs.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat gases does the MQ-135 detect?\u003c\/summary\u003e\u003cp\u003eThe MQ-135 is sensitive to ammonia, benzene, smoke, CO₂, and other volatile compounds. It's ideal for indoor air quality experiments and understanding pollution sources around you.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eMQ-135 air quality sensor lights a green, amber or red LED based on gas concentration. Simple and visual.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eMQ-135 Gas Sensor\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/led-assorted-pack-5mm-red-green-blue-yellow-white-compoden\"\u003e5mm Red LED\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n5mm Yellow LED x2\u003c\/li\u003e\n    \u003cli\u003e\n5mm Green LED x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x10\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship AQ Light Kit with Arduino Nano + MQ135 across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for AQ Light Kit with Arduino Nano + MQ135?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the AQ Light Kit with Arduino Nano + MQ135?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The AQ Light Kit with Arduino Nano + MQ135 includes all components needed: Arduino Uno R3, MQ-135 Gas Sensor, 5mm Red LED, 5mm Yellow LED, 5mm Green LED and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the AQ Light Kit with Arduino Nano + MQ135?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. MQ-135 air quality sensor lights a green, amber or red LED based on gas concentration. Simple and visual. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the AQ Light Kit with Arduino Nano + MQ135 online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the AQ Light Kit with Arduino Nano + MQ135 is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455284044141,"sku":"CDN-KIT-0107-CL","price":540.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455284076909,"sku":"CDN-KIT-0107-R3","price":1530.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455284109677,"sku":"CDN-KIT-0107-R4","price":1250.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/aq-light-kit-with-arduino-nano-mq135-9147345.png?v=1790779146"},{"product_id":"kit-soil-temperature-monitor","title":"Soil Temp Kit with Arduino Nano + DS18B20","description":"\u003cp\u003eSoil Temp Kit with Arduino Nano + DS18B20 — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eMonitor Soil Temperature for Healthier Plants with the Soil Temp Kit – Arduino Nano \u0026amp; DS18B20\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e 1-wire sensor communication\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eHave you ever wondered if your plants are too cold or too warm underground? With this kit, young gardeners and curious makers build a digital thermometer probe that reads soil temperature in real time, displayed on a bright OLED screen. Perfect for science projects, terrace gardens, or understanding the hidden world beneath the soil, this build teaches the 1-wire protocol used in professional weather stations.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou'll assemble a functional soil temperature monitoring system that plugs a waterproof DS18B20 probe into the ground and shows live readings on an OLED display. The code is simple enough for beginners to modify, turning the kit into a plant-care assistant that warns when soil gets too cold for sensitive crops. By the end, you’ll have a battery-powered gadget ready for any school science fair or garden experiment.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eConnect and read data from a digital temperature sensor using the 1-wire protocol.\u003c\/li\u003e\n  \u003cli\u003eDisplay real-time values on an OLED screen using I2C communication.\u003c\/li\u003e\n  \u003cli\u003eProgram an Arduino Nano to act as a data logger and alert system.\u003c\/li\u003e\n  \u003cli\u003eTroubleshoot basic electronics circuits on a breadboard – no soldering required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDS18B20 Probe\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e0.96in OLED SSD1306\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e4.7kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eYoung explorers (age 8-15) participating in ATL Tinkering Labs or CBSE science exhibitions will find this an exciting introduction to environmental sensing. It’s also ideal for B.Tech ECE students preparing for Smart India Hackathon who want a simple weather station sub-system. Parents homeschooling in India love the guided, all-in-one approach that keeps kids engaged for hours without needing a soldering iron.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eOur AI companion, accessible via QR code, guides you step-by-step, with human backup on WhatsApp if needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this kit outdoors?\u003c\/summary\u003e\u003cp\u003eThe DS18B20 probe is waterproof and can be left in soil, but the breadboard and Arduino should be protected from rain.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it work without a computer?\u003c\/summary\u003e\u003cp\u003eOnce programmed, the Arduino runs off a 9V battery (not included) for portable field use.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat plants can I monitor?\u003c\/summary\u003e\u003cp\u003eThe soil temperature range of the DS18B20 (-55°C to +125°C) covers all gardening scenarios; ideal for checking if soil is warm enough for seed germination.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eDS18B20 probe in soil shows temperature for plant care on an OLED. Teaches 1-wire protocol.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/ds18b20-waterproof-temperature-sensor-probe-55c-to-125c\"\u003eDS18B20 Probe\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e0.96in OLED SSD1306\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e4.7kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Soil Temp Kit with Arduino Nano + DS18B20 across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Soil Temp Kit with Arduino Nano + DS18B20?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Soil Temp Kit with Arduino Nano + DS18B20?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Soil Temp Kit with Arduino Nano + DS18B20 includes all components needed: Arduino Uno R3, DS18B20 Probe, 0.96in OLED SSD1306, 4.7kΩ Resistors, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Soil Temp Kit with Arduino Nano + DS18B20?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. DS18B20 probe in soil shows temperature for plant care on an OLED. Teaches 1-wire protocol. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Soil Temp Kit with Arduino Nano + DS18B20 online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Soil Temp Kit with Arduino Nano + DS18B20 is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455285617005,"sku":"CDN-KIT-0108-CL","price":560.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455285649773,"sku":"CDN-KIT-0108-R3","price":1540.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455285682541,"sku":"CDN-KIT-0108-R4","price":1260.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/soil-temp-kit-with-arduino-nano-ds18b20-9115945.png?v=1790779146"},{"product_id":"kit-heat-index-calculator","title":"Heat Index Kit with Arduino Uno + DHT22","description":"\u003cp\u003eHeat Index Kit with Arduino Uno + DHT22 — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild Your Own Heat Index Monitor with Arduino Uno \u0026amp; DHT22 Sensor\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hours\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Understanding derived calculations\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eThe heat index—often called the \"feels-like\" temperature—combines air temperature and relative humidity to estimate how hot the human body perceives the weather. This kit lets young makers build a desktop weather station that reads live data from a DHT22 sensor and calculates the heat index in real time, displaying it clearly on an LCD screen. No prior coding experience is required; the guided build turns complex environmental sensing into a fun, hands-on learning activity.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA compact, battery-powered device that instantly shows temperature, humidity, and the computed heat index. You can move it from room to room, place it near a window, or take it outside (in dry weather) to observe how the heat index changes with the environment. The bright 16x2 LCD makes readings easy to see, and the whole setup fits on a breadboard—perfect for school exhibitions or home weather monitoring.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWiring a DHT22 digital temperature-humidity sensor to Arduino Uno\u003c\/li\u003e\n  \u003cli\u003eDisplaying live sensor readings using an I2C LCD with a backpack module\u003c\/li\u003e\n  \u003cli\u003eProgramming derived calculations—the heat index formula—from raw sensor data\u003c\/li\u003e\n  \u003cli\u003eThe real-world relationship between temperature, humidity, and human comfort\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDHT22 Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16x2 LCD\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI2C Backpack\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for students in ATL Tinkering Labs exploring weather monitoring projects, CBSE Class 9–12 learners needing a hands-on physics or computer science demonstration, and first-year B.Tech ECE\/EEE students getting started with sensor interfacing. Also a perfect parent-child weekend STEM activity that introduces real-world data analysis.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to chat with the AI companion, which knows every wire and line of code for this kit. If you still need help, message us on WhatsApp—a real person will guide you within hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I place the sensor outdoors to measure real weather conditions?\u003c\/summary\u003e\u003cp\u003eThe DHT22 is designed for indoor or sheltered outdoor use. Direct rain or extreme sunlight can damage it. For permanent outside installation, enclose the sensor in a Stevenson screen or a small weatherproof box.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the heat index formula, and will I learn it?\u003c\/summary\u003e\u003cp\u003eYes, the provided Arduino sketch includes a simplified version of the standard heat index equation. The AI companion explains how temperature and humidity combine, and shows you how to adjust constants to match different climate models.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need previous coding experience?\u003c\/summary\u003e\u003cp\u003eNone at all. The kit comes with pre-written code that you can upload directly. The instructions walk you through every step, and the AI companion can explain each line so you understand how the logic works.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eDHT22 measures temperature and humidity to calculate and display heat index on LCD. Intro to derived calculations.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eDHT22 Sensor\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/16x2-lcd-display-module-16x2-character-blue-backlight\"\u003e16x2 LCD\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/i2c-backpack-pcf8574-i2c-adapter-for-lcd-displays\"\u003eI2C Backpack\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Heat Index Kit with Arduino Uno + DHT22 across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Heat Index Kit with Arduino Uno + DHT22?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Heat Index Kit with Arduino Uno + DHT22?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Heat Index Kit with Arduino Uno + DHT22 includes all components needed: Arduino Uno R3, DHT22 Sensor, 16, I2C Backpack, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Heat Index Kit with Arduino Uno + DHT22?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. DHT22 measures temperature and humidity to calculate and display heat index on LCD. Intro to derived calculations. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Heat Index Kit with Arduino Uno + DHT22 online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Heat Index Kit with Arduino Uno + DHT22 is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455286927725,"sku":"CDN-KIT-0109-CL","price":520.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455286960493,"sku":"CDN-KIT-0109-R3","price":2140.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455286993261,"sku":"CDN-KIT-0109-R4","price":2440.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/heat-index-kit-with-arduino-uno-dht22-6302975.png?v=1790779146"},{"product_id":"lightning-counter-kit-arduino-uno-buzzer-storm-tracker","title":"Lightning Counter Kit - Arduino Uno Buzzer Storm Tracker","description":"\u003cp\u003eLightning Counter Kit - Arduino Uno Buzzer Storm Tracker — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild Your Own Lightning Counter \u0026amp; Buzzer Alert System with Arduino Uno\u003c\/h1\u003e\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\u003cdiv class=\"specs-strip\"\u003e\n\u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n\u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 3-4 hours\u003c\/span\u003e\n\u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n\u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Lightning detection \u0026amp; sensor interfacing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003eTracking thunderstorms becomes a hands-on science experiment with this kit. You’ll assemble a working lightning counter that displays distance categories on an OLED screen and sounds a buzzer for every strike—perfect for monsoon curiosity or a school weather project.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA standalone device that counts lightning events, classifies them as “storm overhead,” “nearby,” or “far away,” and shows alerts on a crisp OLED display. An on-board buzzer beeps with each detection, so you can hear the storm activity even when not watching the screen. All powered by a 9V battery for portable weather tracking.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInterfacing the AS3935 lightning sensor via I2C with Arduino Uno\u003c\/li\u003e\n\u003cli\u003eProgramming interrupt-driven buzzer alerts for real-time events\u003c\/li\u003e\n\u003cli\u003eReading and displaying distance data on a 0.96 inch OLED screen\u003c\/li\u003e\n\u003cli\u003eUnderstanding how lightning distance and energy are classified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAS3935 Lightning Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.96in OLED\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4.7kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100nF Capacitors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM-F Wires\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiezo Buzzer\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for ATL Tinkering Lab students, CBSE Class 5 to 8 science projects, and young weather enthusiasts across India. The beginner-friendly build requires no soldering and brings meteorology alive — perfect for a family weekend or a school exhibition under Smart India Hackathon Junior themes.\u003c\/p\u003e\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code inside the box to access the AI build companion; it knows every step of this kit. You can also reach us on WhatsApp for human help.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this kit detect lightning indoors?\u003c\/summary\u003e\u003cp\u003eYes, the AS3935 sensor can sense strikes up to 40 km away even indoors. For best results, place it near a window.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill the buzzer sound for every lightning strike?\u003c\/summary\u003e\u003cp\u003eThe code is set to trigger the buzzer for each valid strike detected. You can adjust the alert threshold easily using the AI companion’s code walk-through.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this kit suitable for a science fair project?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The lightning counter demonstrates real-world sensor data, distance classification, and auditory feedback — all strong STEM project elements for competitions like CBSe science fair or ATL marathon.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eAS3935 lightning detector counts and classifies lightning distance events shown on an OLED display.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eAS3935 Lightning Sensor\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/096in-oled-display-128x64-i2cspi-for-arduino-raspberry-pi\"\u003e0.96in OLED\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e4.7kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/capacitor-variety-pack-6-values-100nf-to-470uf-30-pieces\"\u003e100nF Caps\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003eM-F Wires x10\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Lightning Counter Kit - Arduino Uno Buzzer Storm Tracker across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Lightning Counter Kit - Arduino Uno Buzzer Storm Tracker?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Lightning Counter Kit with Arduino Uno + Buzzer?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Lightning Counter Kit with Arduino Uno + Buzzer includes all components needed: Arduino Uno R3, AS3935 Lightning Sensor, 0.96in OLED, 4.7kΩ Resistors, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Lightning Counter Kit with Arduino Uno + Buzzer?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. AS3935 lightning detector counts and classifies lightning distance events shown on an OLED display. Estimated build time is 3-4 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Lightning Counter Kit with Arduino Uno + Buzzer online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Lightning Counter Kit with Arduino Uno + Buzzer is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455289057645,"sku":"CDN-KIT-0110-CL","price":560.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455289090413,"sku":"CDN-KIT-0110-R3","price":2180.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455289123181,"sku":"CDN-KIT-0110-R4","price":2480.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/lightning-counter-kit-arduino-uno-buzzer-storm-tracker-5075084.png?v=1790779146"},{"product_id":"kit-anemometer-wind-speed-meter","title":"Anemometer Kit with Arduino Nano + Hall Effect","description":"\u003cp\u003eAnemometer Kit with Arduino Nano + Hall Effect — an intermediate-level kit for teens.\u003c\/p\u003e\u003ch1\u003eMeasure Wind Speed with Arduino Uno: DIY Anemometer Kit\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Intermediate\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 4-5 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 15-18\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Arduino Sensor Interfacing\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eTransform a handful of electronics into a real-time wind speed instrument. Whether you are tracking breeze patterns for a school weather station or prototyping a smart agriculture sensor node, this anemometer translates spinning cups into precise km\/h readings on a crisp LCD display. No guesswork—just data you can log, graph, and act on.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA working cup anemometer that counts rotations with a Hall effect sensor, processes the signals with an Arduino Uno, and displays instantaneous wind speed in kilometers per hour. It is a complete, portable weather tool you can mount outdoors or integrate into larger data-logging projects. The I2C LCD keeps wiring simple, and the breadboard layout gives you full insight into every connection.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInterface a Hall effect sensor to detect magnetic field changes without physical contact.\u003c\/li\u003e\n  \u003cli\u003eWrite Arduino code to convert sensor pulses into wind speed using rotational physics.\u003c\/li\u003e\n  \u003cli\u003eDisplay real-time data on a 16x2 LCD via I2C, simplifying wiring and code.\u003c\/li\u003e\n  \u003cli\u003eTroubleshoot sensor noise with pull-up resistors and bypass capacitors for stable readings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eA3144 Hall Effect Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16x2 LCD\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI2C Backpack\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e100nF Caps\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3D-print or DIY Cup Anemometer\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for CBSE Class 11–12 students working on physics investigatory projects, B.Tech ECE and EEE undergraduates experimenting with sensor-based systems, and ATL Tinkering Lab mentors guiding Smart India Hackathon prototypes. If you need a reliable wind speed measurement module for an IoT weather station, this kit gives you a solid foundation without the frustration of parts sourcing.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat is the minimum wind speed this anemometer can detect?\u003c\/summary\u003e\u003cp\u003eThe Hall effect sensor with a small magnet on the cup axle can detect rotations from very light breezes (around 0.5 m\/s). Calibration depends on cup size and arm length; the sample code includes tunable factors.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I power it outdoors for long-term monitoring?\u003c\/summary\u003e\u003cp\u003eYes, you can replace the 9V battery with a 5V solar-charged power bank connected to the Arduino’s USB port. Mount the electronics in a rainproof enclosure for permanent outdoor use.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs soldering required?\u003c\/summary\u003e\u003cp\u003eNo soldering. The kit uses a breadboard and jumper wires, so you can prototype and modify connections quickly. The I2C backpack simplifies LCD wiring to just four pins.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I get help if my LCD shows garbled text?\u003c\/summary\u003e\u003cp\u003eScan the QR code on the box to chat with our AI companion; it is trained on this exact build. You can also reach us on WhatsApp for personalized guidance within 24 hours.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eHall effect sensor on a cup anemometer counts rotations to calculate and display wind speed in km\/h.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eA3144 Hall Effect Sensor\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/16x2-lcd-display-module-16x2-character-blue-backlight\"\u003e16x2 LCD\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/i2c-backpack-pcf8574-i2c-adapter-for-lcd-displays\"\u003eI2C Backpack\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/100nf-ceramic-capacitor-pack-50-pieces-for-arduino-diy\"\u003e100nF Caps\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e3D-print or DIY Cup Anemometer\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Anemometer Kit with Arduino Nano + Hall Effect across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Anemometer Kit with Arduino Nano + Hall Effect?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Anemometer Kit with Arduino Nano + Hall Effect?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Anemometer Kit with Arduino Nano + Hall Effect includes all components needed: Arduino Uno R3, A3144 Hall Effect Sensor, 16, I2C Backpack, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Anemometer Kit with Arduino Nano + Hall Effect?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Intermediate level makers, suitable for ages 15-18. Hall effect sensor on a cup anemometer counts rotations to calculate and display wind speed in km\/h. Estimated build time is 4-5 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Anemometer Kit with Arduino Nano + Hall Effect online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Anemometer Kit with Arduino Nano + Hall Effect is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455293153645,"sku":"CDN-KIT-0112-CL","price":690.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455293186413,"sku":"CDN-KIT-0112-R3","price":1970.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455293219181,"sku":"CDN-KIT-0112-R4","price":1610.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/anemometer-kit-with-arduino-nano-hall-effect-1333887.png?v=1790779146"},{"product_id":"kit-tipping-bucket-rain-gauge","title":"Rain Gauge Kit with Arduino Uno + Switch","description":"\u003cp\u003eRain Gauge Kit with Arduino Uno + Switch — an intermediate-level kit for teens.\u003c\/p\u003e\u003ch1\u003ePrecision Tipping Bucket Rain Gauge with Arduino Uno — Track Every 0.2mm Tip \u0026amp; Calculate Hourly Rate\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Intermediate\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 4-5 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 15-18\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Rainfall data logging and real-time display\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eMonsoon season turns CBSE Class 12 physics projects and B.Tech ECE mini-projects into a scramble for a reliable environmental sensor. This kit eliminates the guesswork. A calibrated tipping bucket mechanism paired with a reed switch generates a precise pulse every 0.2 mm of rain. The Arduino Uno captures those pulses, debounces them, and displays accumulated rainfall and real-time hourly rate on a 16x2 I2C LCD. You get a lab-grade weather station that fits on a breadboard — and a project that stands out at any hackathon or school exhibition.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA standalone rain gauge that counts every bucket tip, updates total rainfall in millimetres on the LCD, and computes the hourly precipitation rate using a DS3231 real-time clock. The reed switch feeds clean signals to the Arduino, which processes them into meaningful data for immediate reading. The system never misses a tip, even during heavy Indian downpours, and the I2C backpack keeps wiring simple.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCalibrate a tipping bucket mechanism for accurate 0.2 mm resolution\u003c\/li\u003e\n  \u003cli\u003eInterface a reed switch with Arduino and implement debounce logic in code\u003c\/li\u003e\n  \u003cli\u003eDrive a 16x2 LCD via I2C backpack to display live sensor data\u003c\/li\u003e\n  \u003cli\u003eUse DS3231 RTC to timestamp events and calculate hourly rainfall rate\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eReed Switch\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16x2 LCD\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI2C Backpack\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDS3231 RTC\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e100nF Caps\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTipping Bucket Mechanism\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eCBSE Class 11–12 students tackling physics investigatory projects will find a perfect blend of mechanics, electromagnetism, and data analysis. B.Tech ECE\/EEE students can use it as a Smart India Hackathon prototype or a mini-project for weather monitoring. ATL Tinkering Labs and science clubs across India trust this kit to demonstrate real-world sensing, while climate studies students at IIT\/NIT\/VIT\/BITS gain hands-on data logging experience.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code for the AI companion that guides you connection by connection and line of code. If you still need a human touch, WhatsApp us — our engineers respond within minutes, ready to debug with you.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the reed switch handle Indian monsoon rain rates?\u003c\/summary\u003e\u003cp\u003eYes, the tipping bucket and reed switch are rated for up to 5 tips per second, easily handling torrential Mumbai or Cherrapunji rainfall. The Arduino debounce algorithm ensures zero missed counts.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I log data to an SD card for long-term study?\u003c\/summary\u003e\u003cp\u003eThe kit focuses on real-time display and hourly rate. However, the AI companion includes optional wiring diagrams and code snippets to connect an SD card module (not included) if you want multi‑day logging.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this kit prepare me for a CBSE physics viva?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The build covers reed switch magnetism, bucket mechanics, RTC‑based timing, and display interfacing. The companion even highlights common viva questions and model answers to boost your confidence.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eReed switch detects each 0.2mm bucket tip. Accumulates rainfall total on LCD with hourly rate calculation.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eReed Switch\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/16x2-lcd-display-module-16x2-character-blue-backlight\"\u003e16x2 LCD\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/i2c-backpack-pcf8574-i2c-adapter-for-lcd-displays\"\u003eI2C Backpack\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/ds3231-real-time-clock-module-i2c-rtc-with-battery-backup\"\u003eDS3231 RTC\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/100nf-ceramic-capacitor-pack-50-pieces-for-arduino-diy\"\u003e100nF Caps\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003eTipping Bucket Mechanism\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Rain Gauge Kit with Arduino Uno + Switch across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Rain Gauge Kit with Arduino Uno + Switch?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Rain Gauge Kit with Arduino Uno + Switch?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Rain Gauge Kit with Arduino Uno + Switch includes all components needed: Arduino Uno R3, Reed Switch, 16, I2C Backpack, DS3231 RTC and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Rain Gauge Kit with Arduino Uno + Switch?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Intermediate level makers, suitable for ages 15-18. Reed switch detects each 0.2mm bucket tip. Accumulates rainfall total on LCD with hourly rate calculation. Estimated build time is 4-5 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Rain Gauge Kit with Arduino Uno + Switch online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Rain Gauge Kit with Arduino Uno + Switch is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455295185261,"sku":"CDN-KIT-0113-CL","price":830.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455295218029,"sku":"CDN-KIT-0113-R3","price":2450.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455295250797,"sku":"CDN-KIT-0113-R4","price":2750.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/rain-gauge-kit-with-arduino-uno-switch-4352153.png?v=1790779146"},{"product_id":"arduino-noise-meter-kit","title":"Arduino Noise Meter Kit","description":"\u003cp\u003eArduino Noise Meter Kit — an intermediate-level kit for teens.\u003c\/p\u003e\u003ch1\u003eBuild a Noise Pollution Monitor with Arduino - Real-Time dB Meter with LCD \u0026amp; Over-Threshold LED Alert\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Intermediate\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 3-4 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 15-18\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sound Level Measurement \u0026amp; Data Visualisation\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eTransform a basic Arduino board into a portable environmental noise meter. This kit equips you with a sensitive MAX4466 microphone module to sample ambient sound, process the signals into decibel-like readings, and display averaged results on a clear LCD. When noise climbs above a preset threshold, a red LED lights up - instantly turning the device into a noise pollution alert system for science exhibitions, school labs, or smart city prototypes.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou'll assemble a fully functional sound level meter on a 400-point breadboard. The MAX4466 captures live audio, the Arduino Nano reads peak amplitudes and computes an approximation of sound pressure level (dB). These values are refreshed on a 16x2 I2C LCD, providing real-time ambient noise readouts. Two red LEDs signal when the noise exceeds a configurable limit, making the meter usable for monitoring classroom chatter, traffic noise, or lab equipment.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInterface analog microphones (MAX4466) with Arduino to capture sound signals\u003c\/li\u003e\n  \u003cli\u003eImplement averaging algorithms to stabilise noisy analog readings\u003c\/li\u003e\n  \u003cli\u003eConvert raw ADC values into approximate decibel levels through calibration\u003c\/li\u003e\n  \u003cli\u003eUse I2C protocol to drive an LCD with only two data pins\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMAX4466 Mic Amplifier\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16x2 LCD\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI2C Backpack\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Red LED\u003c\/td\u003e\n\u003ctd\u003ex2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003ex5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003ex5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e100nF Capacitors\u003c\/td\u003e\n\u003ctd\u003ex5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Jumper Wires\u003c\/td\u003e\n\u003ctd\u003ex20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eStudents in CBSE Class 11-12 testing environmental science experiments, B.Tech ECE\/EEE candidates building mini-projects on sound pollution monitoring, and participants of Smart India Hackathon creating IoT noise sensors will find this kit a ready-to-go prototyping platform. ATL tinkering labs can deploy it to teach analog signal processing, while college clubs at IIT, NIT, VIT, or BITS Pilani use it for campus noise mapping.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code included on the box to chat with our AI companion, trained on this exact project. You can also reach our build support team via WhatsApp for real-time help.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this meter display accurate decibel values?\u003c\/summary\u003e\u003cp\u003eThe MAX4466 provides raw audio amplitude, which the Arduino converts to approximate decibel levels using a reference calibration. It's accurate enough for relative noise comparisons and educational demonstrations. For absolute SPL measurements, a calibrated sound level meter is recommended, but this kit teaches the fundamentals of sound sensing.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I adjust the noise threshold for the LED alert?\u003c\/summary\u003e\u003cp\u003eThe threshold is set in the Arduino sketch; we include sample code with adjustable parameters. Our AI companion can guide you through changing the value and re-uploading the program.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eI want to use an Arduino Nano instead of the supplied Uno. Is that possible?\u003c\/summary\u003e\u003cp\u003eThe kit ships with an Arduino Uno R3 for robust USB programming and ample workspace. The circuit and code are fully compatible with Arduino Nano; you can swap it in without any changes. Our AI companion can help you with the physical pin mapping if you switch boards.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eMAX4466 microphone amplifier samples ambient sound level in dB. Averaged readings shown on LCD with over-threshold LED.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eMAX4466 Mic Amplifier\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/16x2-lcd-display-module-16x2-character-blue-backlight\"\u003e16x2 LCD\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/i2c-backpack-pcf8574-i2c-adapter-for-lcd-displays\"\u003eI2C Backpack\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/led-assorted-pack-5mm-red-green-blue-yellow-white-compoden\"\u003e5mm Red LED\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/capacitor-variety-pack-6-values-100nf-to-470uf-30-pieces\"\u003e100nF Caps\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Arduino Noise Meter Kit across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Arduino Noise Meter Kit?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Noise Meter Kit with Arduino Nano + Mic?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Noise Meter Kit with Arduino Nano + Mic includes all components needed: Arduino Uno R3, MAX4466 Mic Amplifier, 16, I2C Backpack, 5mm Red LED and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Noise Meter Kit with Arduino Nano + Mic?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Intermediate level makers, suitable for ages 15-18. MAX4466 microphone amplifier samples ambient sound level in dB. Averaged readings shown on LCD with over-threshold LED. Estimated build time is 3-4 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Noise Meter Kit with Arduino Nano + Mic online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Noise Meter Kit with Arduino Nano + Mic is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455303573869,"sku":"CDN-KIT-0117-CL","price":930.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455303606637,"sku":"CDN-KIT-0117-R3","price":2210.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455303639405,"sku":"CDN-KIT-0117-R4","price":1850.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/arduino-noise-meter-kit-7077788.png?v=1790779146"},{"product_id":"dew-point-kit-arduino-uno-dht22-oled-display-compoden","title":"Dew Point Kit: Arduino Uno + DHT22, OLED Display - Compoden","description":"\u003cp\u003eDew Point Kit: Arduino Uno + DHT22, OLED Display - Compoden — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eDew Point Kit: Turn Your Room Into a Science Lab with Arduino Uno and DHT22\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hours\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Environmental sensing and coding logic\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eEver noticed water droplets forming on a cold glass on a humid day? That is dew point in action - the temperature where air becomes saturated and moisture condenses. This kit lets young builders measure that exact invisible threshold in real time, using a calibrated DHT22 sensor, an Arduino Uno, and the Magnus formula to compute the point where water vapour turns to liquid. The result appears instantly on a crisp OLED display, turning a subtle weather concept into a live, room-level experiment.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou will assemble a standalone dew point meter that reads ambient temperature and humidity, processes the data through the Magnus equation inside Arduino code, and outputs the dew point temperature onto a bright 0.96-inch OLED screen. The finished gadget sits on your desk, showing exactly when condensation would begin to form - a hands-on tool for understanding moisture, comfort, and weather physics right in your own room.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInterface digital sensors (DHT22) with an Arduino and read temperature\/humidity values\u003c\/li\u003e\n  \u003cli\u003eCode the Magnus formula in Arduino IDE to compute dew point from raw sensor data\u003c\/li\u003e\n  \u003cli\u003eDrive a 0.96-inch OLED display using I2C communication for real-time output\u003c\/li\u003e\n  \u003cli\u003eAssemble a complete electronic circuit on a breadboard, including pull-up resistors and power management\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDHT22\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e0.96in OLED\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eDesigned for students from age 10 upwards who are encountering electronics for the first time, this kit fits seamlessly into CBSE Class 11-12 physics practicals, ATL Tinkering Lab sessions, and B.Tech ECE introductory workshops. It also makes a brilliant first Arduino build for curious kids at home who want to see sensors and code collide to explain everyday weather.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code inside the box to open the AI companion trained on this kit; it can guide you step-by-step through code and wiring. You can also message us on WhatsApp and we'll help within hours.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this kit suitable for a school project submission?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The dew point calculation using the Magnus formula is a textbook topic for CBSE and ICSE physics and provides a complete, self-contained experiment with clear output.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo I need to know coding before starting?\u003c\/summary\u003e\u003cp\u003eNo prior coding knowledge is required. The provided code is fully commented, and the AI companion explains each line, making it perfect for beginners.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdetails\u003e\u003csummary\u003eCan I power the device without a USB cable?\u003c\/summary\u003e\u003cp\u003eYes, the included 9V battery snap lets you run the dew point meter portably - ideal for classroom demonstrations or moving it to different rooms to compare readings.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eDHT22 computes dew point from temperature and humidity using Magnus formula. Displays on OLED.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/dht22-temperature-humidity-sensor-module-accurate-readings\"\u003eDHT22\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/096in-oled-display-128x64-i2cspi-for-arduino-raspberry-pi\"\u003e0.96in OLED\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Dew Point Kit: Arduino Uno + DHT22, OLED Display - Compoden across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Dew Point Kit: Arduino Uno + DHT22, OLED Display - Compoden?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Dew Point Kit with Arduino Uno + DHT22?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Dew Point Kit with Arduino Uno + DHT22 includes all components needed: Arduino Uno R3, DHT22, 0.96in OLED, 10kΩ Resistors, 400-pt Breadboard and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Dew Point Kit with Arduino Uno + DHT22?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. DHT22 computes dew point from temperature and humidity using Magnus formula. Displays on OLED. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Dew Point Kit with Arduino Uno + DHT22 online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Dew Point Kit with Arduino Uno + DHT22 is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455327297901,"sku":"CDN-KIT-0141-CL","price":940.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455327330669,"sku":"CDN-KIT-0141-R3","price":2560.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455327363437,"sku":"CDN-KIT-0141-R4","price":2860.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/dew-point-kit-arduino-uno-dht22-oled-display-compoden-3417336.png?v=1790779086"},{"product_id":"feels-like-kit-arduino-uno-wind-chill-heat-index-lcd-display-project","title":"Feels Like Kit Arduino Uno Wind Chill Heat Index LCD Display Project","description":"\u003cp\u003eFeels Like Kit Arduino Uno Wind Chill Heat Index LCD Display Project — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild a Feels Like Temperature Display with Arduino Uno, DHT22 and Anemometer Input\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Environmental Sensing \u0026amp; Display\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eUnderstand what the weather actually feels like by combining temperature, humidity and wind speed into a single displayed number. This kit walks you through connecting a DHT22 sensor to read air conditions, accepting pulses from a standard anemometer (not included) to calculate wind chill, then combining that with heat index to show a true apparent temperature on the 16x2 LCD. Perfect for a science fair weather station, a home monitoring console, or an introductory embedded systems project.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA compact display unit that calculates \"feels like\" temperature using NOAA formulas. The Arduino Uno reads the DHT22 every second, computes heat index for hot conditions and wind chill for cold windy conditions based on wind speed pulses from your external anemometer, and continuously updates the LCD. The I2C backpack simplifies wiring so you spend time understanding the algorithm, not debugging 16 wires.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInterfacing the DHT22 digital temperature and humidity sensor with Arduino using a one-wire library\u003c\/li\u003e\n  \u003cli\u003eDriving a 16x2 character LCD through an I2C backpack to display multiple data fields\u003c\/li\u003e\n  \u003cli\u003eImplementing wind chill and heat index formulas in C++ with floating-point calculations\u003c\/li\u003e\n  \u003cli\u003eHandling pulse input from a cup anemometer to measure wind speed and trigger apparent temperature updates\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDHT22\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16x2 LCD\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI2C Backpack\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eCBSE Class 11-12 students building physics or computer science investigatory projects on environmental monitoring, ATL Tinkering Lab participants exploring sensor-based data displays, and B.Tech first-year ECE\/EEE learners who want a hands-on introduction to sensor interfacing and real-time calculation in embedded C. The clear 1-2 hour build path also suits hobbyists who want a quick weather dashboard for their desk.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to talk to the AI companion trained on this Feels Like Kit; it can guide you through wiring, code, or formula tweaks, and you can reach us on WhatsApp for a human backup.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the anemometer included in the kit?\u003c\/summary\u003e\u003cp\u003eNo, the kit provides everything to read a standard pulse-output cup anemometer (like the common wind speed sensor). You can connect your own anemometer to the digital input pin to measure wind speed and enable wind chill calculation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use the kit without an external anemometer?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The build works as a temperature and humidity display out of the box. You can simulate wind speed using a push button on the breadboard, or just calculate heat index in still air - still a complete learning experience.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eAre the wind chill and heat index formulas accurate?\u003c\/summary\u003e\u003cp\u003eYes, the included Arduino code uses internationally accepted formulas from NOAA and the US National Weather Service, giving scientifically valid apparent temperature values you can trust for a school project or personal reference.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eCombines wind chill and heat index to show apparent temperature from DHT22 and anemometer input.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/dht22-temperature-humidity-sensor-module-accurate-readings\"\u003eDHT22\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/16x2-lcd-display-module-16x2-character-blue-backlight\"\u003e16x2 LCD\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/i2c-backpack-pcf8574-i2c-adapter-for-lcd-displays\"\u003eI2C Backpack\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Feels Like Kit Arduino Uno Wind Chill Heat Index LCD Display Project across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Feels Like Kit Arduino Uno Wind Chill Heat Index LCD Display Project?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Feels Like Kit Arduino Uno Wind Chill Heat Index LCD Display Project?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Feels Like Kit Arduino Uno Wind Chill Heat Index LCD Display Project includes all components needed: Arduino Uno R3, DHT22, 16, I2C Backpack, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Feels Like Kit Arduino Uno Wind Chill Heat Index LCD Display Project?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Combines wind chill and heat index to show apparent temperature from DHT22 and anemometer input. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Feels Like Kit Arduino Uno Wind Chill Heat Index LCD Display Project online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Feels Like Kit Arduino Uno Wind Chill Heat Index LCD Display Project is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455327756653,"sku":"CDN-KIT-0142-CL","price":930.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455327789421,"sku":"CDN-KIT-0142-R3","price":2550.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455327822189,"sku":"CDN-KIT-0142-R4","price":2850.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/feels-like-kit-arduino-uno-wind-chill-heat-index-lcd-display-project-3699170.png?v=1790779086"},{"product_id":"co-alert-kit-with-arduino-nano-sensor-build-a-carbon-monoxide-detector","title":"CO Alert Kit with Arduino Nano + Sensor - Build a Carbon Monoxide Detector","description":"\u003cp\u003eCO Alert Kit with Arduino Nano + Sensor - Build a Carbon Monoxide Detector — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eCO Alert Kit with Arduino Nano + Sensor - Build Your Own Carbon Monoxide Detector for Home Safety\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Gas sensor monitoring and alarm circuit design\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eCarbon monoxide is a silent, odourless gas that can be lethal in enclosed spaces. With this kit, you'll assemble a real working detector that flashes bright red LEDs and sounds a loud buzzer the moment CO levels cross a safe threshold, giving your home an early warning system you built yourself.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou'll create a complete CO alarm on a breadboard. The MQ-7 sensor continuously samples air quality and sends readings to the Arduino Uno. When the concentration exceeds you-calibrated limit, three red LEDs light up and the active buzzer screams an alert-just like a commercial safety device.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow MQ-7 electrochemical sensors detect carbon monoxide\u003c\/li\u003e\n  \u003cli\u003eReading analog signals and converting them to digital thresholds\u003c\/li\u003e\n  \u003cli\u003eBuilding circuits on a breadboard without soldering\u003c\/li\u003e\n  \u003cli\u003eProgramming conditional logic to control LED and buzzer outputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMQ-7 CO Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eActive Buzzer\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Red LED\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for CBSE\/ICSE students working on science exhibitions, ATL Tinkering Lab innovators, and young makers curious about environmental sensors. With a build time of 2-3 hours and zero soldering, it's accessible for beginners as young as 10, guided by an adult, and makes a powerful project for school competitions.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to launch the AI companion for instant step-by-step help, or reach out on WhatsApp-our team responds within hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I test if the alarm works?\u003c\/summary\u003e\u003cp\u003eBriefly expose the MQ-7 sensor to the smoke from a blown-out match (at a safe distance). The Arduino will detect the gas and trigger the buzzer and LEDs.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I install this as a permanent home CO detector?\u003c\/summary\u003e\u003cp\u003eThis kit is a learning project and not certified for continuous life-safety use. However, the circuit and code can be a foundation for a more robust solution with a proper enclosure and battery backup.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the sensor detect other gases?\u003c\/summary\u003e\u003cp\u003eThe MQ-7 is sensitive to carbon monoxide and, to a lesser extent, hydrogen and LPG. The code can be adjusted to set thresholds only for CO.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eMQ-7 CO sensor triggers alarm if carbon monoxide exceeds safe threshold. LED and buzzer warning.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eMQ-7 CO Sensor\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/piezo-buzzer-module-for-arduino-diy-projects-5v-active-buzzer\"\u003eActive Buzzer\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/led-assorted-pack-5mm-red-green-blue-yellow-white-compoden\"\u003e5mm Red LED\u003c\/a\u003e x3\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship CO Alert Kit with Arduino Nano + Sensor - Build a Carbon Monoxide Detector across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for CO Alert Kit with Arduino Nano + Sensor - Build a Carbon Monoxide Detector?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the CO Alert Kit with Arduino Nano + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The CO Alert Kit with Arduino Nano + Sensor includes all components needed: Arduino Uno R3, MQ-7 CO Sensor, Active Buzzer, 5mm Red LED, 220Ω Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the CO Alert Kit with Arduino Nano + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. MQ-7 CO sensor triggers alarm if carbon monoxide exceeds safe threshold. LED and buzzer warning. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the CO Alert Kit with Arduino Nano + Sensor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the CO Alert Kit with Arduino Nano + Sensor is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455328182637,"sku":"CDN-KIT-0143-CL","price":510.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455328215405,"sku":"CDN-KIT-0143-R3","price":1490.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455328248173,"sku":"CDN-KIT-0143-R4","price":1210.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/co-alert-kit-with-arduino-nano-sensor-build-a-carbon-monoxide-detector-4213587.png?v=1790779086"},{"product_id":"kit-soil-temperature-alarm","title":"Soil Temp Alarm Kit with Arduino Uno + DS18B20","description":"\u003cp\u003eSoil Temp Alarm Kit with Arduino Uno + DS18B20 — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild a Frost-Warning Soil Temperature Alarm with Arduino Uno \u0026amp; DS18B20\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor-based environmental monitoring and alerting\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eProtect your terrace garden or urban farm from surprise frost with a build-it-yourself alarm that senses soil temperature at the root level. On those chilly January mornings when Bengaluru, Pune, or even Delhi temperatures dip near zero, this kit gives you a loud warning before your plants are damaged. You'll wire a waterproof DS18B20 probe, program a threshold on the Arduino, and walk away with a practical gadget that works on a single 9V battery.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA compact monitoring station that you bury the sensor directly into the soil. The Arduino continuously reads temperature data; when the soil drops below your chosen threshold (e.g., 2°C), a buzzer screams and two red LEDs flash. There's no screen needed—just loud, visible alert that gives you time to cover sensitive plants or move pots indoors. The whole circuit lives on a breadboard, so you can modify it later to send SMS alerts or log data.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWiring a DS18B20 one-wire sensor and reading precise temperature values\u003c\/li\u003e\n  \u003cli\u003eProgramming if-else logic in Arduino to compare real-time temperature against a threshold\u003c\/li\u003e\n  \u003cli\u003eUsing a breadboard to prototype a battery-powered monitoring circuit\u003c\/li\u003e\n  \u003cli\u003eCalibrating readings and setting realistic frost alert levels suited for Indian climate zones\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDS18B20 Waterproof\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eActive Buzzer\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Red LED\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e4.7kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for school students (CBSE Class 5–10) and ATL Tinkering Labs looking for a real-world sensor project. Young makers who love gardening will see immediate use—protecting their plants becomes the motivation to learn electronics. Also a great first kit for B.Tech first-year students exploring Arduino, or urban gardeners who want a custom, budget-conscious frost alarm without buying a readymade device.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eOpen the AI companion through the QR code on the box, or message us on WhatsApp. The system recognizes exactly which step you’re on and offers code snippets, wiring corrections, and even a video walkthrough of the soil temperature alarm build.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I change the temperature threshold?\u003c\/summary\u003e\u003cp\u003eYes, the Arduino code is fully editable. The AI guide will show you the exact line where the threshold is set, and you can modify it for heat alerts, defrost warnings, or any custom trigger point.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this work outdoors?\u003c\/summary\u003e\u003cp\u003eThe DS18B20 probe is waterproof and rated for direct burial in soil. The breadboard and Arduino need a simple weatherproof enclosure (not included) to stay safe from dew and rain. The AI companion suggests easy enclosure ideas using household items.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I power it in the garden?\u003c\/summary\u003e\u003cp\u003eUse the included 9V battery snap with a standard 9V battery. It easily runs overnight for frost watch. For longer monitoring, you can replace with a power bank or solar charger through the Arduino’s USB port.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eDS18B20 buried probe warns gardener when soil temperature drops below frost risk level.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eDS18B20 Waterproof\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/piezo-buzzer-module-for-arduino-diy-projects-5v-active-buzzer\"\u003eActive Buzzer\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/led-assorted-pack-5mm-red-green-blue-yellow-white-compoden\"\u003e5mm Red LED\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e4.7kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Soil Temp Alarm Kit with Arduino Uno + DS18B20 across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Soil Temp Alarm Kit with Arduino Uno + DS18B20?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Soil Temp Alarm Kit with Arduino Uno + DS18B20?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Soil Temp Alarm Kit with Arduino Uno + DS18B20 includes all components needed: Arduino Uno R3, DS18B20 Waterproof, Active Buzzer, 5mm Red LED, 4.7kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Soil Temp Alarm Kit with Arduino Uno + DS18B20?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. DS18B20 buried probe warns gardener when soil temperature drops below frost risk level. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Soil Temp Alarm Kit with Arduino Uno + DS18B20 online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Soil Temp Alarm Kit with Arduino Uno + DS18B20 is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455328444781,"sku":"CDN-KIT-0144-CL","price":430.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455328477549,"sku":"CDN-KIT-0144-R3","price":2050.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455328510317,"sku":"CDN-KIT-0144-R4","price":2350.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/soil-temp-alarm-kit-with-arduino-uno-ds18b20-4458505.png?v=1790779086"},{"product_id":"weather-trend-kit-with-arduino-uno-and-bmp280-predict-rain-or-fair","title":"Weather Trend Kit with Arduino Uno \u0026 BMP280 - Predict Rain or Fair","description":"\u003cp\u003eWeather Trend Kit with Arduino Uno \u0026amp; BMP280 - Predict Rain or Fair — an intermediate-level kit for teens.\u003c\/p\u003e\u003ch1\u003eWeather Trend Kit with Arduino Uno \u0026amp; BMP280 - Predict Rain or Fair Weather with Pressure Trends\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Intermediate\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 4-5 hours\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 15-18\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Pressure Trend Prediction\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eWhat if your Arduino could look at pressure trends and tell you whether to carry an umbrella - before the weather apps update? With this kit, you'll build a standalone device that takes a reading from the BMP280 sensor every 10 minutes, compares it to recent history, and shows a sun or rain icon on the OLED screen. No internet, no subscription, just physics.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou'll assemble a weather indicator that uses the BMP280 to sample atmospheric pressure, the DS3231 RTC to keep precise 10-minute intervals, and the 0.96-inch OLED to show a clear sun (rising pressure, fair weather) or rain cloud (falling pressure, rain likely). The trend logic runs entirely on the Arduino Uno, making this a self-contained predictor you can mount on a wall or carry to school.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInterface I2C sensors (BMP280 and OLED) using the Wire library\u003c\/li\u003e\n  \u003cli\u003eImplement a trend-detection algorithm by comparing rolling pressure averages\u003c\/li\u003e\n  \u003cli\u003eUse a DS3231 RTC module to trigger periodic sensor reads without delay loops\u003c\/li\u003e\n  \u003cli\u003eTroubleshoot noisy signals with decoupling capacitors on a breadboard\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBMP280\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDS3231 RTC\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e0.96in OLED\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e4.7kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e100nF Capacitors\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMale-Male Jumper Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIf you're a CBSE Class 11-12 student looking for a unique physics-in-action project, or a B.Tech ECE\/EEE first-year building a mini-project, this kit delivers a complete experience. It is also ideal for ATL Tinkering Labs and Smart India Hackathon participants who need a rapid prototype for weather-based IoT ideas. The build fits neatly into a 4-hour lab session and teaches engineering thinking through real sensor data.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to open the AI companion; it knows every wire and line of code for this kit. If you prefer, send a photo on WhatsApp - a real human from our Bengaluru lab will reply within a few hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does the kit predict weather from pressure alone?\u003c\/summary\u003e\u003cp\u003eThe BMP280 samples pressure every 10 minutes. The Arduino stores a rolling average and compares the current reading against the average from 60 minutes ago. A rising trend lights up a sun icon, a falling trend a rain icon, following the same principle used in professional barometers.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I log the pressure data for analysis?\u003c\/summary\u003e\u003cp\u003eYes. The kit can be extended with a microSD card module (not included) or you can send values to the serial monitor and capture them in a spreadsheet. The RTC timestamps every reading, so you can plot trends over hours or days.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this work with an Arduino Mega or Nano?\u003c\/summary\u003e\u003cp\u003eThe circuit and code are designed for the Uno R3's I2C and 5V logic. It will work on a Mega with the same wiring, and on a Nano if you adapt the pin headers. The AI companion provides notes for both boards if you want to experiment.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eBMP280 samples pressure every 10 min. Rising pressure predicts fair, falling predicts rain. Shows icon on OLED.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/bmp280-barometric-pressure-temperature-sensor-module-compodenin\"\u003eBMP280\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/ds3231-real-time-clock-module-i2c-rtc-with-battery-backup\"\u003eDS3231 RTC\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/096in-oled-display-128x64-i2cspi-for-arduino-raspberry-pi\"\u003e0.96in OLED\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e4.7kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/capacitor-variety-pack-6-values-100nf-to-470uf-30-pieces\"\u003e100nF Caps\u003c\/a\u003e x10\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Weather Trend Kit with Arduino Uno \u0026amp; BMP280 - Predict Rain or Fair across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Weather Trend Kit with Arduino Uno \u0026amp; BMP280 - Predict Rain or Fair?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Weather Trend Kit with Arduino Mega + BMP280?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Weather Trend Kit with Arduino Mega + BMP280 includes all components needed: Arduino Uno R3, BMP280, DS3231 RTC, 0.96in OLED, 4.7kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Weather Trend Kit with Arduino Mega + BMP280?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Intermediate level makers, suitable for ages 15-18. BMP280 samples pressure every 10 min. Rising pressure predicts fair, falling predicts rain. Shows icon on OLED. Estimated build time is 4-5 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Weather Trend Kit with Arduino Mega + BMP280 online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Weather Trend Kit with Arduino Mega + BMP280 is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455328674157,"sku":"CDN-KIT-0145-CL","price":840.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455328706925,"sku":"CDN-KIT-0145-R3","price":2460.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455328739693,"sku":"CDN-KIT-0145-R4","price":2760.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/weather-trend-kit-with-arduino-uno-bmp280-predict-rain-or-fair-7241962.png?v=1790779086"},{"product_id":"em-field-meter-kit","title":"EM Field Meter Kit","description":"\u003cp\u003eEM Field Meter Kit — an intermediate-level kit for teens.\u003c\/p\u003e\u003ch1\u003eEM Field Meter Kit: Detect AC Magnetic Fields with Arduino Uno \u0026amp; Hall Effect Sensor\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Intermediate\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 3-4 hours\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 15-18\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Measuring AC magnetic fields \u0026amp; interpreting EMI data\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003ePower lines, transformers, and even household appliances radiate invisible AC magnetic fields that most people never measure. This kit turns an Arduino Uno, a precise Hall effect sensor, and an ACS712 current sensor into a handheld meter that instantly displays magnetic flux density in millitesla on a sharp OLED screen. Take it near an electrical panel or under high-tension cables and watch the numbers spike - a tangible way to understand electromagnetic interference that's usually confined to textbooks.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA battery-operated field strength meter that maps AC electromagnetic fields in real time. You'll calibrate the sensor using the included ACS712, then walk through any environment to log baseline and peak mT readings on the crisp 0.96-inch OLED. Ideal for CBSE physics experiments, EMF awareness campaigns, or Smart India Hackathon prototypes that need environmental sensing.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInterfacing the A3144 Hall effect sensor and ACS712 current sensor with Arduino Uno to capture analog field data\u003c\/li\u003e\n  \u003cli\u003eConverting raw ADC readings into magnetic flux density (millitesla) using calibrated transfer functions\u003c\/li\u003e\n  \u003cli\u003eDriving a 0.96-inch I2C OLED display to show live measurements and min\/max values\u003c\/li\u003e\n  \u003cli\u003ePractical EMC awareness - identifying common sources of AC magnetic interference around homes and campuses\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eA3144 Hall Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eACS712 5A\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e0.96in OLED\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e100nF Caps\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eTailored for CBSE Class 11-12 learners tackling electromagnetism and sensor-based practicals, B.Tech ECE\/EEE students delving into EMI\/EMC design, Smart India Hackathon participants building environmental monitoring solutions, and ATL Tinkering Lab innovators ready to move beyond simple LED circuits. If you're at IIT, NIT, VIT, or BITS Pilani, this kit bridges lab theory with a field-ready prototype you can demonstrate in a project review.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to open the AI companion that walks through every connection and code block. If you need a human touch, WhatsApp us - we respond within 2 hours on working days.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this meter detect DC magnetic fields from permanent magnets?\u003c\/summary\u003e\u003cp\u003eOut of the box, it's calibrated for 50\/60 Hz AC fields, but the A3144 Hall sensor responds to static fields. With a minor code tweak (removing the AC-coupled filter), you can measure DC flux density as well.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow accurate is the millitesla reading?\u003c\/summary\u003e\u003cp\u003eAfter the included calibration routine, accuracy stays within ±10% for typical household EMF levels (0.01-2 mT). It's excellent for comparative studies and awareness projects, not a certified lab instrument.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need to solder anything?\u003c\/summary\u003e\u003cp\u003eNo soldering at all. Every connection uses the breadboard and male-to-male jumper wires - you can assemble and disassemble the meter in minutes.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eHall effect sensor and coil detect AC magnetic field strength. OLED shows mT level. Useful near power lines.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eA3144 Hall Sensor\u003c\/li\u003e\n    \u003cli\u003eACS712 5A\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/096in-oled-display-128x64-i2cspi-for-arduino-raspberry-pi\"\u003e0.96in OLED\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/100nf-ceramic-capacitor-pack-50-pieces-for-arduino-diy\"\u003e100nF Caps\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship EM Field Meter Kit across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for EM Field Meter Kit?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the EM Field Meter Kit with Arduino Nano + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The EM Field Meter Kit with Arduino Nano + Sensor includes all components needed: Arduino Uno R3, A3144 Hall Sensor, ACS712 5A, 0.96in OLED, 100nF Caps and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the EM Field Meter Kit with Arduino Nano + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Intermediate level makers, suitable for ages 15-18. Hall effect sensor and coil detect AC magnetic field strength. OLED shows mT level. Useful near power lines. Estimated build time is 3-4 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the EM Field Meter Kit with Arduino Nano + Sensor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the EM Field Meter Kit with Arduino Nano + Sensor is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455328936301,"sku":"CDN-KIT-0147-CL","price":760.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455328969069,"sku":"CDN-KIT-0147-R3","price":2040.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455329001837,"sku":"CDN-KIT-0147-R4","price":1680.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/em-field-meter-kit-3094694.png?v=1790779086"},{"product_id":"stay-ahead-of-lightning-arduino-uno-storm-distance-alert-kit-with-as3935","title":"Stay Ahead of Lightning: Arduino Uno Storm Distance Alert Kit with AS3935","description":"\u003cp\u003eStay Ahead of Lightning: Arduino Uno Storm Distance Alert Kit with AS3935 — an intermediate-level kit for teens.\u003c\/p\u003e\u003ch1\u003eStay Ahead of Lightning: Arduino Uno Storm Distance Alert Kit with AS3935\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Intermediate\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 3-4 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 15-18\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Embedded sensor interfacing\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eWhen storm clouds gather, knowing how far away the lightning is can be a life‑saving advantage. This kit puts you in control: you’ll build a compact monitor that reads data from a dedicated AS3935 thunderstorm sensor, instantly classifying a strike’s distance up to 40 km and sounding an alert on the OLED display. Whether you’re tracking the monsoon for a school weather station or prototyping a personal safety device, every part you need arrives in one box, ready to solder-free on a breadboard.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You’ll Build\u003c\/h2\u003e\n\u003cp\u003eYour finished project will detect real lightning strokes and display the distance in kilometres, the estimated storm category (from “disturbance” to “severe”), and a cumulative strike counter. The DS3231 real‑time clock logs each event with a timestamp, so you can review storm activity later. An OLED screen shows live data, and the system can be expanded to trigger an external buzzer or LED warning when a storm creeps inside the 40 km danger zone.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You’ll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eConfigure and calibrate an AS3935 lightning sensor over SPI to recognise genuine strikes while rejecting man‑made noise\u003c\/li\u003e\n  \u003cli\u003eIntegrate a DS3231 RTC to log events with precise day‑hour‑minute timestamps, even without an internet connection\u003c\/li\u003e\n  \u003cli\u003eDisplay real‑time sensor readings and strike history on a 0.96‑inch OLED using the Arduino U8g2 library\u003c\/li\u003e\n  \u003cli\u003eDesign a portable, battery‑operated monitoring circuit that consumes minimal power for outdoor use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAS3935 Lightning Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDS3231 RTC\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e0.96in OLED\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e4.7kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e100nF Caps\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-F Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eThis intermediate-level kit is ideal for CBSE Class 11–12 students working on physics or computer science investigatory projects that require environmental data logging. B.Tech ECE\/EEE undergraduates can use it to demonstrate embedded sensor interfacing in their mini‑projects or as a proof‑of‑concept for the Smart India Hackathon. ATL tinkering labs and weather hobby clubs will also find it a compelling introduction to storm tracking without needing any soldering.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eOpen the AI companion on your phone by scanning the QR code on the box; it can walk you through any step. You can also send a WhatsApp message to our support team for human help within hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this kit detect lightning when I’m indoors?\u003c\/summary\u003e\u003cp\u003eYes, the AS3935 sensor is designed to sense electromagnetic disturbances from lightning strikes even through walls, though a window placement is ideal. The kit differentiates real strikes from man‑made noise.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it need an internet connection for distance calculation?\u003c\/summary\u003e\u003cp\u003eNo. All processing happens on the Arduino Uno using the AS3935’s internal algorithm. The DS3231 RTC keeps accurate time without Wi‑Fi, so the device works completely offline, making it perfect for outdoor or remote use.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I log the strike data to an SD card or send it to a cloud?\u003c\/summary\u003e\u003cp\u003eThe kit logs to the OLED and via the Arduino’s serial monitor. To save data, you can easily add an SD card module (sold separately) or use Bluetooth\/Wi‑Fi shields to stream logs to a phone app — the AI companion includes hints for these expansions.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eAS3935 lightning sensor classifies storm distance and logs strike count. Alerts when storm within 40km.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eAS3935 Lightning Sensor\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/ds3231-real-time-clock-module-i2c-rtc-with-battery-backup\"\u003eDS3231 RTC\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/096in-oled-display-128x64-i2cspi-for-arduino-raspberry-pi\"\u003e0.96in OLED\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e4.7kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/100nf-ceramic-capacitor-pack-50-pieces-for-arduino-diy\"\u003e100nF Caps\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003eM-F Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Stay Ahead of Lightning: Arduino Uno Storm Distance Alert Kit with AS3935 across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Stay Ahead of Lightning: Arduino Uno Storm Distance Alert Kit with AS3935?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Stay Ahead of Lightning: Arduino Uno Storm Distance Alert Kit with AS3935?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Stay Ahead of Lightning: Arduino Uno Storm Distance Alert Kit with AS3935 includes all components needed: Arduino Uno R3, AS3935 Lightning Sensor, DS3231 RTC, 0.96in OLED, 4.7kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Stay Ahead of Lightning: Arduino Uno Storm Distance Alert Kit with AS3935?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Intermediate level makers, suitable for ages 15-18. AS3935 lightning sensor classifies storm distance and logs strike count. Alerts when storm within 40km. Estimated build time is 3-4 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Stay Ahead of Lightning: Arduino Uno Storm Distance Alert Kit with AS3935 online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Stay Ahead of Lightning: Arduino Uno Storm Distance Alert Kit with AS3935 is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455329198445,"sku":"CDN-KIT-0149-CL","price":820.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455329231213,"sku":"CDN-KIT-0149-R3","price":2440.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455329263981,"sku":"CDN-KIT-0149-R4","price":2740.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/stay-ahead-of-lightning-arduino-uno-storm-distance-alert-kit-with-as3935-1198522.png?v=1790779086"},{"product_id":"kit-garden-microclimate-recorder","title":"Garden Microclimate Recorder","description":"\u003cp\u003eGarden Microclimate Recorder — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild Your Own Garden Microclimate Recorder with Arduino — Log Temperature, Humidity \u0026amp; Light Every 15 Minutes\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor interfacing and data logging\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eYour garden tells a story through temperature swings, humidity shifts, and changing light levels — and this kit lets you capture it all. Whether you’re monitoring a terrace patch of coriander, a school’s botanical corner, or a small farm plot, you’ll assemble a standalone recorder that logs readings every 15 minutes onto onboard EEPROM. Later, just plug into a computer via USB and download the data as a clean CSV file for analysis, no external storage or cloud needed.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll wire up a DHT22 sensor, an LDR light sensor, and a real-time clock to an Arduino Uno, then upload code that timestamps and stores climate data directly in the microcontroller’s memory. The finished gadget runs on a 9V battery and sits quietly in your garden shed or against a window, building a detailed log you can retrieve anytime. It’s a self-contained microclimate station that turns raw sensor signals into a genuine scientific record.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInterface digital (DHT22) and analog (LDR) sensors with Arduino\u003c\/li\u003e\n  \u003cli\u003eUse the DS3231 RTC module to add accurate timestamps\u003c\/li\u003e\n  \u003cli\u003eWrite data to EEPROM and manage memory constraints\u003c\/li\u003e\n  \u003cli\u003eDownload logged data over serial and convert to CSV\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDHT22\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLDR\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDS3231 RTC\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eYoung makers and students will feel right at home. CBSE Class 8–12 learners tackling environmental monitoring assignments, ATL Tinkering Lab explorers, and even B.Tech ECE first‑years tinkering with data logging will find this project engaging. With a little adult help, even a 10‑year‑old can build a real scientific instrument, turning a simple garden into a living lab.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code inside the box to start a chat with the AI companion that knows every wire and line of code for this kit. If something still doesn’t click, reply on WhatsApp for human help.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I change how often it logs data?\u003c\/summary\u003e\u003cp\u003eYes, the Arduino sketch is fully open. A single line in the code sets the log interval — change it from 15 minutes to any value that fits your project, then re-upload.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I get the recorded data onto my computer?\u003c\/summary\u003e\u003cp\u003ePlug the Arduino into a USB port, open the Serial Monitor in the Arduino IDE, and send a command. The kit outputs all stored readings as comma‑separated values you can copy into Excel or any spreadsheet.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan the recorder run outdoors on battery alone?\u003c\/summary\u003e\u003cp\u003eAfter you upload the code, disconnect the USB and snap on a 9V battery. The logger will run entirely on battery, stamping data with the real‑time clock, until you retrieve it later for download.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eDHT22 + LDR log temperature, humidity and light every 15 min to EEPROM. Download via serial.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/dht22-temperature-humidity-sensor-module-accurate-readings\"\u003eDHT22\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/ldr-sensor-5mm-light-dependent-resistor-for-arduino-compoden\"\u003eLDR\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/ds3231-real-time-clock-module-i2c-rtc-with-battery-backup\"\u003eDS3231 RTC\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x10\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Garden Microclimate Recorder?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Garden Microclimate Recorder includes all components needed: Arduino Uno R3, DHT22, LDR, DS3231 RTC, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Garden Microclimate Recorder?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. DHT22 + LDR log temperature, humidity and light every 15 min to EEPROM. Download via serial. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Garden Microclimate Recorder online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Garden Microclimate Recorder is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53455330083181,"sku":"CDN-KIT-0167","price":710.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/garden-microclimate-recorder-1761993.png?v=1790779027"},{"product_id":"kit-raindrop-sensor-led-display","title":"Raindrop Sensor LED Display","description":"\u003cp\u003eRaindrop Sensor LED Display — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eRaindrop Sensor LED Display Kit — See Rainfall Intensity Light Up with Arduino\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Analog Sensor Interfacing \u0026amp; LED PWM Control\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine a desk gadget that reacts to the sky. As the first drops hit your window, one LED glows dimly. When a downpour begins, all five shine bright in a cascading display. This kit turns a simple rain sensor into a real-time rainfall intensity meter—perfect for young weather enthusiasts, a school science model, or a quick afternoon maker project with the family.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll build a stand-alone visual rainfall display. The rain sensor detects moisture on its surface, and the Arduino reads that changing signal. Five LEDs light up progressively: a gentle drizzle activates only the first LED, steady rain moves to the third, and heavy rain makes all five blaze. It’s a tangible, immediate way to see data without a screen, sparking curiosity about analog signals and environmental sensing.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow a resistive rain sensor works and generates an analog voltage\u003c\/li\u003e\n  \u003cli\u003eReading analog inputs with Arduino and mapping values to LED brightness\u003c\/li\u003e\n  \u003cli\u003eControlling multiple LEDs using PWM to create smooth dimming effects\u003c\/li\u003e\n  \u003cli\u003eBuilding a simple weather station circuit on a breadboard without soldering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRain Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm LED Assorted\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for CBSE Class 5–9 students exploring sensor-based models, ATL Tinkering Lab beginners, or any curious 5–15-year-old wanting a monsoon science project. It’s also a reliable plug-and-prototype tool for B.Tech ECE first-years and hobbyists who need a quick rain indicator for smart home or agriculture demos.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code inside the box to ask the AI companion for instant troubleshooting, or message us on WhatsApp. We reply within a few hours to get you back on track.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this kit without any coding experience?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The AI guide provides the exact code with simple line-by-line explanations. You’ll learn as you build, no prior coding needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill the rain sensor work outdoors?\u003c\/summary\u003e\u003cp\u003eThe sensor is designed for indoor experimentation and light moisture. For outdoor use, protect the Arduino and battery in a waterproof enclosure (not included).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I power it after the code is uploaded?\u003c\/summary\u003e\u003cp\u003eUse the 9V battery snap to power the Arduino Uno directly—no computer needed. Perfect for a standalone display on your desk or near a window.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eRain sensor drives 5 LEDs brightening progressively with increasing rainfall intensity.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/bf350-high-precision-strain-gauge-pressure-sensor-module\"\u003eRain Sensor\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/inductive-proximity-sensor-5mm-npn-no-ceyone-compoden\"\u003e5mm LED Assorted\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Raindrop Sensor LED Display?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Raindrop Sensor LED Display includes all components needed: Arduino Uno R3, Rain Sensor, 5mm LED Assorted, 220Ω Resistors, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Raindrop Sensor LED Display?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Rain sensor drives 5 LEDs brightening progressively with increasing rainfall intensity. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Raindrop Sensor LED Display online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Raindrop Sensor LED Display is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53455330115949,"sku":"CDN-KIT-0168","price":430.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/raindrop-sensor-led-display-6925221.png?v=1790779026"},{"product_id":"kit-wind-chill-temperature-calculator","title":"Wind Chill Temperature Calculator","description":"\u003cp\u003eWind Chill Temperature Calculator — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild a Wind Chill Temperature Calculator with Arduino — Real Weather Science for Young Makers\u003c\/h1\u003e\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor data reading and weather computation\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003eEver noticed how a breeze makes a hot day feel cooler? That's wind chill—the cooling effect of wind on skin. With this kit, you'll build a handheld Arduino device that measures the actual air temperature using a DHT22 sensor, lets you dial in a simulated wind speed with a rotary encoder, and instantly calculates and displays the wind chill temperature on a crisp OLED screen. It's a practical, hands-on introduction to meteorology, electronics, and data processing that fits into a CBSE science project or after-school STEM activity.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou'll assemble a compact instrument that reads real temperature from the DHT22, captures wind speed input from the rotary encoder (simulating an anemometer), runs a standard wind chill formula inside the Arduino, and shows both the measured temperature and the computed wind chill value on the 0.96-inch OLED display. The finished gadget helps you understand how wind transforms the perceived temperature, making it ideal for science fairs, classroom demonstrations, or just satisfying your curiosity about weather.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWiring and reading a digital temperature\/humidity sensor (DHT22) with Arduino\u003c\/li\u003e\n  \u003cli\u003eInterfacing a rotary encoder to simulate variable wind speed input\u003c\/li\u003e\n  \u003cli\u003eImplementing the mathematical wind chill formula in Arduino code\u003c\/li\u003e\n  \u003cli\u003eDisplaying dynamic sensor data on an I2C OLED screen\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDHT22\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRotary Encoder\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e0.96in OLED\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003ex5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003ex15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eYoung learners aged 5–15 exploring electronics for the first time, CBSE Class 5–8 students building science exhibition models, ATL Tinkering Lab facilitators who need ready-to-use STEM kits, and parents introducing hands-on weather science at home. Even B.Tech ECE\/EEE freshers can use it to quickly prototype sensor integration.\u003c\/p\u003e\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eOpen the AI companion via the QR code for real-time troubleshooting, or message us on WhatsApp — you’ll have a human guide within minutes.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is wind chill and how does this kit calculate it?\u003c\/summary\u003e\u003cp\u003eWind chill is the cooling sensation caused by wind on exposed skin. The kit reads air temperature from the DHT22, uses the rotary encoder to set a wind speed value, and applies the standard wind chill formula to compute the “feels like” temperature displayed on the OLED.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need any soldering?\u003c\/summary\u003e\u003cp\u003eNo soldering required. All connections are made on a breadboard using the included M-M jumper wires, making the kit safe, reusable, and easy for small hands.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I extend this to measure real wind speed?\u003c\/summary\u003e\u003cp\u003eAbsolutely. Once you master the simulation, you can swop the rotary encoder for an actual anemometer sensor (like a wind speed module) by attaching it to the breadboard and tweaking the Arduino code.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eRotary encoder inputs wind speed. DHT22 measures air temperature. OLED shows wind chill value.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/dht22-temperature-humidity-sensor-module-accurate-readings\"\u003eDHT22\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/cjmcu-103-rotary-angle-sensor-module-300-analog-output\"\u003eRotary Encoder\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/096in-oled-display-128x64-i2cspi-for-arduino-raspberry-pi\"\u003e0.96in OLED\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Wind Chill Temperature Calculator?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Wind Chill Temperature Calculator includes all components needed: Arduino Uno R3, DHT22, Rotary Encoder, 0.96in OLED, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Wind Chill Temperature Calculator?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Rotary encoder inputs wind speed. DHT22 measures air temperature. OLED shows wind chill value. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Wind Chill Temperature Calculator online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Wind Chill Temperature Calculator is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53455330443629,"sku":"CDN-KIT-0178","price":880.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/wind-chill-temperature-calculator-7629030.png?v=1790779027"},{"product_id":"kit-air-freshener-smoke-detector","title":"Air Freshener Smoke Detector","description":"\u003cp\u003eAir Freshener Smoke Detector — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild an Automatic Air Freshener Smoke Detector with Arduino — A Smart Spray System Kit\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor-based automation\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine walking into a room that always smells fresh, and a gentle spray of fragrance activates the moment it detects cigarette smoke or cooking fumes. With this kit, you’ll build exactly that: a smoke-triggered air freshener powered by the MQ-2 gas sensor and Arduino Uno. It’s a fun, practical project that teaches you to combine environmental sensing with real-world action, while adding a useful gadget to your home.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eBy the end of this project, you’ll have a working prototype that uses an MQ-2 sensor to monitor air quality and activates a relay to switch on an air freshener spray pump (or any small DC pump) when smoke levels cross a user-set threshold. The two red LEDs indicate the system status and alert when it’s spraying. You can customise the sensitivity to respond only to heavy smoke or even light cooking vapours.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow to interface the MQ-2 gas sensor and calibrate its smoke detection threshold\u003c\/li\u003e\n  \u003cli\u003eUsing a 5V relay module to control a high-power device like a spray pump\u003c\/li\u003e\n  \u003cli\u003eWriting Arduino code to read analog sensor values and trigger outputs\u003c\/li\u003e\n  \u003cli\u003eBuilding a practical home automation gadget from scratch on a breadboard\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMQ-2 Gas Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5V Relay Module\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Red LED\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1N4007 Diode\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eYoung makers aged 8+ who want to build a useful home gadget. Perfect for CBSE Class 5–8 science projects, ATL Tinkering Lab sessions, or weekend tinkering at home. The step-by-step guide assumes no prior electronics experience, making it accessible for complete beginners who are curious about sensors and automation.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code on the box to access the AI build companion trained on this exact project. It provides step-by-step troubleshooting, and you can also reach us via WhatsApp for human support.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I connect a real air freshener spray pump to this circuit?\u003c\/summary\u003e\u003cp\u003eYes, the relay is rated for 10A at 250VAC or 30VDC, so you can safely connect a small DC pump or even an AC plug-in air freshener. The kit includes diodes to protect the circuit from inductive kickback.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat kind of smoke will the MQ-2 detect?\u003c\/summary\u003e\u003cp\u003eIt detects LPG, butane, methane, alcohol, and smoke from cigarettes or cooking. You can adjust the sensitivity potentiometer on the sensor to set your desired threshold.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need to solder anything?\u003c\/summary\u003e\u003cp\u003eNo soldering required. Everything plugs into the breadboard using the included male-to-male jumper wires.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eMQ-2 smoke sensor triggers relay air freshener spray pump when smoke detected above threshold.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/mq-2-smoke-gas-sensor-module-lpg-propane-methane-detection\"\u003eMQ-2 Gas Sensor\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/4-channel-relay-board-for-esp32-30-pin-5v-control\"\u003e5V Relay Module\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/led-variety-pack-50-pcs-3mm-5mm-mixed-colours\"\u003e5mm Red LED\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/diode-variety-pack-1n4007-1n4148-1n5819-zener-assortment\"\u003e1N4007 Diode\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Air Freshener Smoke Detector?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Air Freshener Smoke Detector includes all components needed: Arduino Uno R3, MQ-2 Gas Sensor, 5V Relay Module, 5mm Red LED, 1N4007 Diode and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Air Freshener Smoke Detector?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. MQ-2 smoke sensor triggers relay air freshener spray pump when smoke detected above threshold. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Air Freshener Smoke Detector online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Air Freshener Smoke Detector is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53455330476397,"sku":"CDN-KIT-0179","price":560.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/air-freshener-smoke-detector-5741599.png?v=1790779027"},{"product_id":"kit-wind-chill-temperature-calculator-v10","title":"Wind Chill Calculator Kit with Arduino Uno + DHT22","description":"\u003cp\u003eWind Chill Calculator Kit with Arduino Uno + DHT22 — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eArduino Wind Chill Calculator Kit: Turn a Dial to Know How Cold It Really Feels\u003c\/h1\u003e\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Interfacing environmental sensors with Arduino\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003eOn a chilly morning, the temperature on your phone says one thing, but the wind makes it bite much harder. That difference is wind chill, and with this kit, you build the calculator that reveals it. Take a real temperature reading from the DHT22 sensor, dial in the wind speed with the rotary encoder, and instantly see the “feels like” temperature on the OLED—just like a professional weather station but in your hands.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble a self-contained wind chill calculator powered by Arduino Uno. The DHT22 captures the ambient air temperature, and you set the wind speed by turning the knob of the rotary encoder. The OLED display updates live, showing both the measured temperature and the computed wind chill value. It’s a compact, battery-run gadget you can carry outdoors and use to compare real wind conditions with the classic formula.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWire a DHT22 temperature \u0026amp; humidity sensor and read its data with Arduino code\u003c\/li\u003e\n  \u003cli\u003eInterface a rotary encoder so that each step of the dial corresponds to a wind speed input\u003c\/li\u003e\n  \u003cli\u003eImplement the standard wind chill equation in Arduino to process real-time sensor values\u003c\/li\u003e\n  \u003cli\u003eDisplay dynamic numerical results on a 0.96-inch OLED screen using I2C communication\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDHT22 Temperature \u0026amp; Humidity Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRotary Encoder\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e0.96-inch OLED Display\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistor\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-point Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMale-to-Male Jumper Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eYoung science enthusiasts aged 5–15 who want to understand how wind chill works by building a real calculator. Perfect for CBSE Class 5–10 science projects, ATL Tinkering Lab demonstrations, and parents looking for a meaningful screen-time break activity. It’s an ideal first Arduino project that brings weather physics to life.\u003c\/p\u003e\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eOpen the AI companion from the QR code or message us on WhatsApp. It can walk you through each connection and line of code until your calculator works.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this kit without any prior electronics experience?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The step-by-step AI companion explains every connection and includes pre-written code—no prior experience needed, just curiosity.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the rotary encoder measure real wind speed?\u003c\/summary\u003e\u003cp\u003eIn this version, the encoder is a manual dial that you turn to simulate wind speeds. It’s a great way to understand how wind chill responds to different wind strengths.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat if my child finds the coding part intimidating?\u003c\/summary\u003e\u003cp\u003eThe AI companion provides fully commented, ready-to-upload code. Your child can just copy and paste it into the Arduino software, click upload, and watch it run.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eRotary encoder inputs wind speed. DHT22 measures air temperature. OLED shows wind chill value.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/dht22-temperature-humidity-sensor-module-accurate-readings\"\u003eDHT22\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/cjmcu-103-rotary-angle-sensor-module-300-analog-output\"\u003eRotary Encoder\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/096in-oled-display-128x64-i2cspi-for-arduino-raspberry-pi\"\u003e0.96in OLED\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Wind Chill Calculator Kit with Arduino Uno + DHT22?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Wind Chill Calculator Kit with Arduino Uno + DHT22 includes all components needed: Arduino Uno R3, DHT22, Rotary Encoder, 0.96in OLED, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Wind Chill Calculator Kit with Arduino Uno + DHT22?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Rotary encoder inputs wind speed. DHT22 measures air temperature. OLED shows wind chill value. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Wind Chill Calculator Kit with Arduino Uno + DHT22 online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Wind Chill Calculator Kit with Arduino Uno + DHT22 is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53455330967917,"sku":"CDN-KIT-0194","price":880.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/wind-chill-temperature-calculator-variant-10-3095663.png?v=1790778968"},{"product_id":"kit-air-freshener-smoke-detector-v11","title":"Smoke-Triggered Air Freshener Kit with Arduino Uno + MQ-2 Gas Sensor","description":"\u003cp\u003eSmoke-Triggered Air Freshener Kit with Arduino Uno + MQ-2 Gas Sensor — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eSmoke-Triggered Air Freshener Kit with Arduino Uno – Beginner Project\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 1-2 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor-actuator automation\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine an air freshener that only sprays when it detects smoke or foul odours, keeping your space fresh automatically and alerting you to potential hazards. This kit uses a real MQ-2 gas sensor and Arduino Uno to build that intelligent device. In just a couple of hours, you’ll have a working prototype that senses smoke, triggers a relay, and could control a small spray pump—an ideal introduction to environment sensing and practical automation.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll wire the MQ-2 sensor to read smoke concentration, program an Arduino threshold, and use a relay to switch an external spray pump (not included). The circuit includes indicator LEDs that glow red when smoke is detected, and a diode-protected relay circuit ensures safe switching. By the end, you’ll have a breadboard prototype that responds to real-world smoke just like a commercial air quality system.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWiring an MQ-2 gas sensor and calibrating its analogue output for smoke detection\u003c\/li\u003e\n  \u003cli\u003eProgramming an Arduino Uno to read sensor values and control a relay\u003c\/li\u003e\n  \u003cli\u003eUsing a relay module to switch higher-power devices safely while isolating the microcontroller\u003c\/li\u003e\n  \u003cli\u003eIntegrating a 1N4007 diode for flyback protection in relay circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMQ-2 Gas Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5V Relay Module\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Red LED\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1N4007 Diode\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003ePerfect for CBSE Class 11–12 students exploring sensor-based automation, B.Tech ECE\/EEE first-years prototyping mini projects, and ATL Tinkering Lab innovators. Smart India Hackathon participants will find it a quick way to demonstrate air quality solutions. Suitable for ages 5–15 with minimal adult supervision, it’s a confidence-builder for any young maker interested in environment technology.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to access the AI companion that knows every step of this project. You can also reach us on WhatsApp for direct help.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this kit include the air freshener spray pump?\u003c\/summary\u003e\u003cp\u003eNo, the relay output is a dry contact. You can connect any 5V\/12V spray pump or solenoid valve you wish. We recommend a small DC air freshener pump available at most local electronics shops.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I detect other gases with the MQ-2 sensor?\u003c\/summary\u003e\u003cp\u003eYes. The MQ-2 responds to smoke, LPG, propane, hydrogen, and other combustible gases. You can adjust the threshold and code to target a different gas for custom applications.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need any extra tools to complete the project?\u003c\/summary\u003e\u003cp\u003eAll electronic components and wires are included. You only need a USB cable to upload code to the Arduino and a small spray pump of your choice to actuate.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eMQ-2 smoke sensor triggers relay air freshener spray pump when smoke detected above threshold.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/mq-2-smoke-gas-sensor-module-lpg-propane-methane-detection\"\u003eMQ-2 Gas Sensor\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/4-channel-relay-board-for-esp32-30-pin-5v-control\"\u003e5V Relay Module\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/led-variety-pack-50-pcs-3mm-5mm-mixed-colours\"\u003e5mm Red LED\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/diode-variety-pack-1n4007-1n4148-1n5819-zener-assortment\"\u003e1N4007 Diode\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x15\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Smoke-Triggered Air Freshener Kit with Arduino Uno + MQ-2 Gas Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Smoke-Triggered Air Freshener Kit with Arduino Uno + MQ-2 Gas Sensor includes all components needed: Arduino Uno R3, MQ-2 Gas Sensor, 5V Relay Module, 5mm Red LED, 1N4007 Diode and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Smoke-Triggered Air Freshener Kit with Arduino Uno + MQ-2 Gas Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. MQ-2 smoke sensor triggers relay air freshener spray pump when smoke detected above threshold. Estimated build time is 1-2 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Smoke-Triggered Air Freshener Kit with Arduino Uno + MQ-2 Gas Sensor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Smoke-Triggered Air Freshener Kit with Arduino Uno + MQ-2 Gas Sensor is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53455331000685,"sku":"CDN-KIT-0195","price":560.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/air-freshener-smoke-detector-variant-11-5979015.png?v=1790778967"},{"product_id":"kit-automatic-night-lamp","title":"Automatic Night Lamp Kit with Arduino Uno + LDR","description":"\u003cp\u003eAutomatic Night Lamp Kit with Arduino Uno + LDR — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild an Automatic Night Lamp: Arduino Uno \u0026amp; LDR Beginner Home Automation Kit\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Light sensing and switching\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine a lamp that knows when it's dark and lights up automatically, no switch needed. This kit lets you build exactly that — a real home automation gadget you can place on your desk or bedside. You'll learn how an LDR (light-dependent resistor) senses ambient light, how the Arduino Uno reads its signal, and how a transistor acts as a smart switch to turn five bright white LEDs on or off.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou'll build a breadboard circuit where the LDR constantly monitors room brightness. When it gets dark, the Arduino triggers the BC547 transistor, which lights up the five LEDs just like a night lamp. The entire project runs on a 9V battery, so it's portable and safe. You can adjust the darkness threshold in code, customizing when the lamp turns on.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow to read an analog sensor (LDR) with Arduino's analog input\u003c\/li\u003e\n  \u003cli\u003eHow to use a transistor as a switch to control higher-current LEDs\u003c\/li\u003e\n  \u003cli\u003eBasic breadboard wiring and component identification\u003c\/li\u003e\n  \u003cli\u003eArduino programming: analogRead, digitalWrite, and threshold logic\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLDR\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm White LED\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBC547 Transistor\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for CBSE class 11-12 students, ATL Tinkering Lab participants, and first-year B.Tech ECE\/EEE students. Also great for hobbyists and parents introducing coding to kids aged 10+.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code included in the kit to chat with our AI companion, which knows every step of this project. You can also WhatsApp us for human support — average response time is under 30 minutes during business hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I run the lamp continuously on a 9V battery?\u003c\/summary\u003e\u003cp\u003eA standard 9V alkaline battery powers the kit for several hours of continuous use. For longer runtimes, you can plug the Arduino Uno into a USB power bank instead.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need to know coding beforehand?\u003c\/summary\u003e\u003cp\u003eNot at all. We provide the complete, commented Arduino code, along with a walkthrough that explains each line. You'll learn programming while building.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I add more LEDs or a relay for a bigger lamp?\u003c\/summary\u003e\u003cp\u003eAbsolutely. Once you understand the transistor switching principle, you can drive a relay or MOSFET to control a mains-powered bulb. This kit is your foundation for advanced home automation.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eLDR detects darkness and switches LEDs on via transistor. First real-world switching circuit.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\nLDR x2\u003c\/li\u003e\n    \u003cli\u003e\n5mm White LED x5\u003c\/li\u003e\n    \u003cli\u003e\nBC547 Transistor x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e1kΩ Resistors x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Automatic Night Lamp Kit with Arduino Uno + LDR across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Automatic Night Lamp Kit with Arduino Uno + LDR?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Automatic Night Lamp Kit with Arduino Uno + LDR?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Automatic Night Lamp Kit with Arduino Uno + LDR includes all components needed: Arduino Uno R3, LDR, 5mm White LED, BC547 Transistor, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Automatic Night Lamp Kit with Arduino Uno + LDR?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. LDR detects darkness and switches LEDs on via transistor. First real-world switching circuit. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Automatic Night Lamp Kit with Arduino Uno + LDR online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Automatic Night Lamp Kit with Arduino Uno + LDR is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455336341869,"sku":"CDN-KIT-0201-CL","price":670.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455336374637,"sku":"CDN-KIT-0201-R3","price":2290.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455336407405,"sku":"CDN-KIT-0201-R4","price":2590.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/automatic-night-lamp-kit-with-arduino-uno-ldr-7032043.png?v=1790778966"},{"product_id":"kit-touch-lamp-dimmer","title":"Touch Lamp Dimmer Kit with Arduino Uno + Sensor","description":"\u003cp\u003eTouch Lamp Dimmer Kit with Arduino Uno + Sensor — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild a Touch-Sensitive LED Dimmer with the Arduino Uno \u0026amp; TTP223 Sensor Kit\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e PWM dimming with analogWrite\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine a lamp that responds to a light touch — no switch, no clunky knob. This kit puts a capacitive touch dimmer into your hands, letting you cycle through LED brightness levels with each tap on the TTP223 sensor. It’s a real-world prototype for bedside lamps, study lights, or any home automation idea you want to explore.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble a fully working LED dimmer circuit on a 400-point breadboard. The five white LEDs connect to Arduino’s PWM pins, and with every tap on the TTP223 sensor pad, the brightness steps up or loops back. You’ll see how code translates a touch into smooth, controllable light — a compact model ready to mount in a project enclosure or present at a science exhibition.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWrite PWM (analogWrite) code to smoothly dim LEDs through multiple levels\u003c\/li\u003e\n  \u003cli\u003eInterface a capacitive touch sensor (TTP223) with Arduino Uno and read its digital output\u003c\/li\u003e\n  \u003cli\u003eMap sensor states to logic — use conditionals to cycle through brightness steps\u003c\/li\u003e\n  \u003cli\u003eBuild a reliable breadboard circuit with current-limiting resistors and proper wiring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTTP223 Touch Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm White LED\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003ePerfect for young makers (ages 8–15) working on CBSE school projects or ATL tinkering lab assignments. B.Tech ECE and EEE beginners will find it a hands-on way to understand PWM and sensor integration, while parents can confidently introduce their child to coding and electronics with a safe, pre-tested bundle. It’s also an engaging demo for Smart India Hackathon ideas or science fair prototypes.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eThe AI companion walks you through each connection, code line by line, and offers troubleshooting. You can also message us on WhatsApp for quick human help.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this kit suitable for a science exhibition project?\u003c\/summary\u003e\u003cp\u003eYes. The touch-controlled dimmer is a crowd‑friendly demonstration of capacitive sensing and PWM. It runs on a 9V battery and fits neatly on a display board.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use more LEDs or different colours?\u003c\/summary\u003e\u003cp\u003eYou can add up to 10 LEDs in parallel using the same 220Ω resistors, or swap for any colour. The code is easy to modify for custom brightness patterns.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need soldering?\u003c\/summary\u003e\u003cp\u003eNo soldering is required. All parts plug straight into the included breadboard, so the kit is reusable and beginner‑safe.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eTTP223 capacitive touch sensor cycles through LED brightness levels with each tap. Teaches PWM dimming.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eTTP223 Touch Sensor\u003c\/li\u003e\n    \u003cli\u003e\n5mm White LED x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Touch Lamp Dimmer Kit with Arduino Uno + Sensor across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Touch Lamp Dimmer Kit with Arduino Uno + Sensor?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Touch Lamp Dimmer Kit with Arduino Uno + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Touch Lamp Dimmer Kit with Arduino Uno + Sensor includes all components needed: Arduino Uno R3, TTP223 Touch Sensor, 5mm White LED, 220Ω Resistors, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Touch Lamp Dimmer Kit with Arduino Uno + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. TTP223 capacitive touch sensor cycles through LED brightness levels with each tap. Teaches PWM dimming. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Touch Lamp Dimmer Kit with Arduino Uno + Sensor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Touch Lamp Dimmer Kit with Arduino Uno + Sensor is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455336604013,"sku":"CDN-KIT-0202-CL","price":790.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455336636781,"sku":"CDN-KIT-0202-R3","price":2040.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455336669549,"sku":"CDN-KIT-0202-R4","price":2340.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/touch-lamp-dimmer-kit-with-arduino-uno-sensor-4753811.png?v=1790778967"},{"product_id":"clap-switch-kit-with-arduino-uno-learn-pattern-detection-and-debounce","title":"Clap Switch Kit with Arduino Uno - Learn Pattern Detection \u0026 Debounce","description":"\u003cp\u003eClap Switch Kit with Arduino Uno - Learn Pattern Detection \u0026amp; Debounce — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eClap Switch Kit with Arduino Uno - Build a Sound-Activated Home Automation Switch\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hours\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Pattern Detection \u0026amp; Debounce\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine walking into a dark room and just clapping twice to turn on the light. This Clap Switch Kit turns that idea into a real, working circuit. You'll build a smart home automation module that listens for a specific double-clap pattern and toggles a lamp or LED - all while learning how to filter out noise and false triggers.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA fully functional clap-activated switch. You'll wire the KY-038 sound sensor to detect sound pulses, program the Arduino Uno to recognize a double-clap pattern using debounce logic, and control a 5V relay to switch an actual lamp. By the end, you'll have a prototype ready for your bedside, study table, or a school science exhibition.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow to use a KY-038 sound sensor to convert claps into digital signals\u003c\/li\u003e\n  \u003cli\u003eImplementing debounce algorithms to ignore accidental sounds and multiple triggers\u003c\/li\u003e\n  \u003cli\u003eProgramming pattern recognition in Arduino to identify a double-clap sequence\u003c\/li\u003e\n  \u003cli\u003eSafely controlling a 5V relay module to switch high-voltage devices like a lamp\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eKY-038 Sound Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5V Relay Module\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm LED\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1N4007 Diode\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eThis kit is perfect for CBSE Class 5-10 students working on home automation science projects, ATL Tinkering Lab young innovators prototyping voice-free controls, and curious kids aged 8-15 who want to build a real gadget they can use every day. It's also an excellent parent-child weekend project to introduce coding and circuit building together.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eOpen the AI companion via the QR code on the box. It's trained specifically on this clap switch circuit and can guide you step by step; you can also reach us on WhatsApp for human help.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I connect a real lamp to the relay output?\u003c\/summary\u003e\u003cp\u003eYes, the 5V relay can safely switch AC loads, but if you are under 15, ask an adult to help with the mains wiring. We recommend starting with the included LEDs for testing.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill the clap switch detect accidental sounds like door knocks?\u003c\/summary\u003e\u003cp\u003eThe debounce and pattern-detection code you'll write minimises false triggers by requiring a specific double-clap rhythm. Random loud noises won't easily match the pattern.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need a computer to program the Arduino?\u003c\/summary\u003e\u003cp\u003eYou'll need any laptop or desktop (Windows, Mac, or Linux) with a USB port and the free Arduino IDE. The kit includes all connection wires; no soldering is required.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eSound sensor detects double clap pattern and toggles relay to switch a lamp. Teaches debounce and pattern detection.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eKY-038 Sound Sensor\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/4-channel-relay-board-for-esp32-30-pin-5v-control\"\u003e5V Relay Module\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n5mm LED x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/diode-variety-pack-1n4007-1n4148-1n5819-zener-assortment\"\u003e1N4007 Diode\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Clap Switch Kit with Arduino Uno - Learn Pattern Detection \u0026amp; Debounce across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Clap Switch Kit with Arduino Uno - Learn Pattern Detection \u0026amp; Debounce?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Clap Switch Kit with Arduino Uno + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Clap Switch Kit with Arduino Uno + Sensor includes all components needed: Arduino Uno R3, KY-038 Sound Sensor, 5V Relay Module, 5mm LED, 1N4007 Diode and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Clap Switch Kit with Arduino Uno + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Sound sensor detects double clap pattern and toggles relay to switch a lamp. Teaches debounce and pattern detection. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Clap Switch Kit with Arduino Uno + Sensor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Clap Switch Kit with Arduino Uno + Sensor is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455340962157,"sku":"CDN-KIT-0203-CL","price":550.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455340994925,"sku":"CDN-KIT-0203-R3","price":2170.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455341027693,"sku":"CDN-KIT-0203-R4","price":2470.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/clap-switch-kit-with-arduino-uno-learn-pattern-detection-debounce-6968134.png?v=1790778966"},{"product_id":"kit-automatic-hand-sanitiser-dispenser","title":"Automatic Hand Sanitiser Dispenser Kit with Arduino Uno + Sensor","description":"\u003cp\u003eAutomatic Hand Sanitiser Dispenser Kit with Arduino Uno + Sensor — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eAutomatic Hand Sanitiser Dispenser Kit – Touch-Free Hygiene with Arduino Uno\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 3-4 hours\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor-actuator control\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine a hands-free sanitiser dispenser that springs to life the moment you place your hand beneath it—no taps, no pumps, no cross-contamination. With this Arduino Uno-based kit, you'll build exactly that: a smart home automation device that uses an infrared proximity sensor to detect a hand and a miniature servo to press down on any standard pump bottle. It’s a perfect entry-level project for young makers, school science exhibitions, or anyone wanting to promote hygiene at home or in a classroom.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble and program a complete automatic hand sanitiser station. When your hand moves within a few centimetres under the sensor, a green LED lights up and the servo arm smoothly presses the dispenser nozzle, releasing a measured amount of liquid. Remove your hand, and the servo resets, ready for the next user. Mount it next to a doorway or on a study desk, and you’ve built a practical, contactless hygiene tool that works every time.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow infrared proximity sensors detect objects and output signals\u003c\/li\u003e\n  \u003cli\u003eControlling a servo motor with Arduino’s PWM pins\u003c\/li\u003e\n  \u003cli\u003eReading sensor data and triggering actions in Arduino IDE\u003c\/li\u003e\n  \u003cli\u003eBreadboarding a circuit and managing power with a 9V battery\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIR Proximity Sensor\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSG90 Servo\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm Green LED\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eYoung makers aged 5-15 dipping into electronics, CBSE students exploring home automation concepts for school projects, and ATL Tinkering Lab participants looking for a quick, rewarding build. It's also a fun parent-child weekend activity or a science fair entry. Beginners with no soldering experience can jump right in—everything plugs into the breadboard.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and\n\n\u003c\/p\u003e\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eIR proximity sensor triggers a mini servo to press a pump dispenser when hand is detected beneath it.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eIR Proximity Sensor\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/sg90-servo-motor-9g-micro-servo-for-robotics-arduino\"\u003eSG90 Servo\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n5mm Green LED x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Automatic Hand Sanitiser Dispenser Kit with Arduino Uno + Sensor across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Automatic Hand Sanitiser Dispenser Kit with Arduino Uno + Sensor?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Automatic Hand Sanitiser Dispenser Kit with Arduino Uno + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Automatic Hand Sanitiser Dispenser Kit with Arduino Uno + Sensor includes all components needed: Arduino Uno R3, IR Pro, SG90 Servo, 5mm Green LED, 220Ω Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Automatic Hand Sanitiser Dispenser Kit with Arduino Uno + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. IR proximity sensor triggers a mini servo to press a pump dispenser when hand is detected beneath it. Estimated build time is 3-4 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Automatic Hand Sanitiser Dispenser Kit with Arduino Uno + Sensor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Automatic Hand Sanitiser Dispenser Kit with Arduino Uno + Sensor is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455341093229,"sku":"CDN-KIT-0204-CL","price":490.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455341125997,"sku":"CDN-KIT-0204-R3","price":2110.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455341158765,"sku":"CDN-KIT-0204-R4","price":2410.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/automatic-hand-sanitiser-dispenser-kit-with-arduino-uno-sensor-2182421.png?v=1790778966"},{"product_id":"kit-smart-dustbin-lid","title":"Smart Dustbin Lid Kit with Arduino Uno + Ultrasonic","description":"\u003cp\u003eSmart Dustbin Lid Kit with Arduino Uno + Ultrasonic — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eSmart Dustbin Lid Kit with Arduino Uno \u0026amp; HC-SR04 – Build a Touchless Bin for Hands-Free Waste Disposal\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Sensor-actuator automation\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine walking to your dustbin with messy hands and the lid opens by itself – this kit brings that smart home experience to life. Using the HC-SR04 ultrasonic sensor and an SG90 servo, you’ll build a lid that detects your hand and swings open within seconds, then closes automatically. Perfect for school exhibits, home hacks, or a first explore Arduino-based home automation.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble a fully functional automatic dustbin lid that lifts when an object (like a waving hand) comes within 15 cm. The circuit sits on a breadboard, the servo shaft attaches to a small lid flap, and the ultrasonic sensor continuously scans for a trigger. Once you load the code, the lid responds smoothly and predictably. You can mount the prototype on any existing bin or a cardboard model.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInterface an HC-SR04 ultrasonic sensor with Arduino Uno to read distances\u003c\/li\u003e\n  \u003cli\u003eControl an SG90 servo motor based on a threshold distance\u003c\/li\u003e\n  \u003cli\u003eUnderstand sensor calibration and trigger logic for real-world use\u003c\/li\u003e\n  \u003cli\u003eDebug sensor-actuator systems on a solderless breadboard\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHC-SR04\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSG90 Servo\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003ex5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003ex5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003ex20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eDesigned for students in CBSE Class 6–10, ATL Tinkering Lab participants, and young hobbyists curious about home automation. It’s also an ideal parent-child weekend project, introducing sensor logic and servo control without any soldering. Whether you’re preparing for a school science exhibition or just want a hands-free dustbin on your desk, this kit gives you a real, usable outcome.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code to open our AI companion; it can guide you through every connection and debugging step. You can also message us on WhatsApp for direct help from a human instructor.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need prior programming experience?\u003c\/summary\u003e\u003cp\u003eNo. The Arduino sketch is provided, and our companion explains how to upload it and tweak the opening distance if you want to customize.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I mount this on any dustbin?\u003c\/summary\u003e\u003cp\u003eYes, the servo and sensor can be attached to a cardboard template or a real bin lid with minimal adhesive. The circuit is compact enough to sit beside the bin.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat happens if the sensor stops detecting correctly?\u003c\/summary\u003e\u003cp\u003eCheck the wiring against the included diagram and ensure no loose jumper wires on the breadboard. The AI companion will help you run a quick serial monitor test to verify sensor readings.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eHC-SR04 ultrasonic detects hand approach and servo opens the dustbin lid automatically.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/hc-sr04-ultrasonic-sensor-module-5v-distance-2cm-400cm\"\u003eHC-SR04\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/sg90-servo-motor-9g-micro-servo-for-robotics-arduino\"\u003eSG90 Servo\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship Smart Dustbin Lid Kit with Arduino Uno + Ultrasonic across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for Smart Dustbin Lid Kit with Arduino Uno + Ultrasonic?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Smart Dustbin Lid Kit with Arduino Uno + Ultrasonic?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Smart Dustbin Lid Kit with Arduino Uno + Ultrasonic includes all components needed: Arduino Uno R3, HC-SR04, SG90 Servo, 220Ω Resistors, 10kΩ Resistors and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Smart Dustbin Lid Kit with Arduino Uno + Ultrasonic?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. HC-SR04 ultrasonic detects hand approach and servo opens the dustbin lid automatically. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Smart Dustbin Lid Kit with Arduino Uno + Ultrasonic online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Smart Dustbin Lid Kit with Arduino Uno + Ultrasonic is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455342338413,"sku":"CDN-KIT-0205-CL","price":870.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455342371181,"sku":"CDN-KIT-0205-R3","price":2490.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455342403949,"sku":"CDN-KIT-0205-R4","price":2790.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/smart-dustbin-lid-kit-with-arduino-uno-ultrasonic-2822309.png?v=1790778967"},{"product_id":"kit-pir-staircase-light","title":"PIR Staircase Light Kit with Arduino Uno + Relay","description":"\u003cp\u003ePIR Staircase Light Kit with Arduino Uno + Relay — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eAutomate Your Staircase Lights with PIR Sensor \u0026amp; Arduino Uno Kit\u003c\/h1\u003e\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Timed relay output\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003eStep onto the stairs and a gentle glow lights your way—automatically, no hands needed. This beginner-friendly kit lets you build a real PIR motion sensor staircase light that stays on for exactly 30 seconds, perfect for late-night trips or energy-saving home automation. You’ll assemble a circuit that reacts to movement and controls an LED strip with a relay, just like a professional home automation system.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou'll create a working motion‑triggered light using a PIR sensor, Arduino Uno, and a 5V relay. When someone walks near the sensor, five white LEDs illuminate for 30 seconds. Mount the breadboard near a staircase, and every time motion is detected, the steps light up—no switches, no timing hassles. It’s a real‑world automation project you can use at home.\u003c\/p\u003e\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHow a PIR sensor detects motion and sends a digital signal to Arduino\u003c\/li\u003e\n  \u003cli\u003eControlling a relay module with Arduino to switch higher‑current loads\u003c\/li\u003e\n  \u003cli\u003eWriting timing functions in Arduino code to hold an output for a set duration\u003c\/li\u003e\n  \u003cli\u003eUsing diodes and resistors to protect circuits and limit LED current\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHC-SR501 PIR\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5V Relay Module\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5mm White LED\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1N4007 Diode\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eThis kit is perfect for students in ATL Tinkering Labs, CBSE school science projects, and B.Tech EEE\/ECE freshers at IIT, NIT, or VIT who want a ready‑made home automation demo. It’s also an ideal parent‑child build for kids aged 5–15 exploring motion‑sensing concepts, bringing Smart India Hackathon ideas to life at a junior level.\u003c\/p\u003e\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code on your kit box to access the AI companion trained on this project; you can also reach us on WhatsApp for personalized guidance.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this circuit to light up my entire staircase?\u003c\/summary\u003e\u003cp\u003eThe 5V relay handles loads up to 250V AC\/30V DC at 10A. You can connect a longer LED strip or even a small AC light, but always follow electrical safety norms and consult an adult if you’re under 15.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need any prior programming experience?\u003c\/summary\u003e\u003cp\u003eNo. The Arduino code is pre‑written and explained step‑by‑step. You’ll learn how timing functions work without needing any coding skills beforehand.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat age is this kit actually suitable for?\u003c\/summary\u003e\u003cp\u003eWe recommend ages 5–15 with adult supervision for younger children. The breadboard and jumper wires are safe, and the project is simple enough for a 10‑year‑old to complete independently.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003ePIR sensor lights LED strip for 30 seconds when motion detected on stairs. Teaches timed relay output.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/hc-sr501-pir-motion-sensor-module-for-arduino-raspberry-pi\"\u003eHC-SR501 PIR\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/4-channel-relay-board-for-esp32-30-pin-5v-control\"\u003e5V Relay Module\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n5mm White LED x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/diode-variety-pack-1n4007-1n4148-1n5819-zener-assortment\"\u003e1N4007 Diode\u003c\/a\u003e x2\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/small-breadboard-400-points-mini-solderless-board-for-electronics-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDo you deliver across India?\u003c\/summary\u003e\u003cp\u003eYes. We ship PIR Staircase Light Kit with Arduino Uno + Relay across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat payment options are available for PIR Staircase Light Kit with Arduino Uno + Relay?\u003c\/summary\u003e\u003cp\u003eWe accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eBuilt and shipped from Compoden, with COD and UPI available across India.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the PIR Staircase Light Kit with Arduino Uno + Relay?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The PIR Staircase Light Kit with Arduino Uno + Relay includes all components needed: Arduino Uno R3, HC-SR501 PIR, 5V Relay Module, 5mm White LED, 1N4007 Diode and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the PIR Staircase Light Kit with Arduino Uno + Relay?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. PIR sensor lights LED strip for 30 seconds when motion detected on stairs. Teaches timed relay output. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the PIR Staircase Light Kit with Arduino Uno + Relay online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the PIR Staircase Light Kit with Arduino Uno + Relay is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Clone","offer_id":53455344763245,"sku":"CDN-KIT-0206-CL","price":520.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original","offer_id":53455344796013,"sku":"CDN-KIT-0206-R3","price":2140.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi","offer_id":53455344828781,"sku":"CDN-KIT-0206-R4","price":2440.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/pir-staircase-light-kit-with-arduino-uno-relay-3391112.png?v=1790778966"},{"product_id":"kit-digital-doorbell-with-name-display","title":"Digital Doorbell with Name Display","description":"\u003cp\u003eDigital Doorbell with Name Display — a beginner-level kit for kids.\u003c\/p\u003e\u003ch1\u003eBuild a Smart Doorbell with Custom Name Display — Beginner Arduino Project\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Beginner\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 2-3 hrs\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 5-15\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Basic Electronics \u0026amp; Arduino Coding\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine a doorbell that announces visitors by name on a crisp LCD screen and sounds a cheerful buzzer. This kit transforms a simple button press into a personalized home automation project — perfect for kids, students, and first-time makers who want to see electronics come alive in their own home.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eA working digital doorbell system where each of three buttons triggers a unique message on a 16x2 LCD and activates an active buzzer. You can label buttons with family member names or funny greetings. The display stays on until the next press, making it practical for real home use or school demonstrations.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWiring a breadboard with Arduino Uno, buttons, buzzer, and I2C LCD backpack\u003c\/li\u003e\n  \u003cli\u003eUsing the LiquidCrystal_I2C library to control text display\u003c\/li\u003e\n  \u003cli\u003eReading digital inputs from tactile switches with pull-down resistors\u003c\/li\u003e\n  \u003cli\u003eWriting Arduino code to match button presses to custom strings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTactile Button\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eActive Buzzer\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16x2 LCD\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI2C Backpack\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e220Ω Resistors\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e400-pt Breadboard\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-M Wires\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9V Battery Snap\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eStudents in CBSE classes 6-10 working on electronics projects, ATL lab facilitators looking for ready-to-run STEM activities, and parents introducing their children 5+ to coding and circuits. B.Tech first-year students at NIT\/VIT will find it a gentle entry point for Arduino programming and embedded systems demonstrations.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eThe AI companion (scan the QR code on the box) will walk you through every connection and code line. If you still need a human, WhatsApp support is just a message away.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I customize the messages on the LCD?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The sample code is structured to let you assign any text — like \"Amit is here\" or \"Pizza delivery!\" — to each of the three buttons. Just edit the strings in the Arduino sketch.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this kit suitable for a school science exhibition?\u003c\/summary\u003e\u003cp\u003eYes, it's ideal for CBSE science fairs, ATL tinkering events, and Smart India Hackathon junior tracks. The clear display and audible alert make the project engaging for judges and visitors.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I add more buttons or sensors later?\u003c\/summary\u003e\u003cp\u003eThe breadboard and Arduino have spare digital pins. You can expand with additional buttons or even a PIR motion sensor. The AI companion can suggest advanced modifications.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003ePush button rings buzzer and displays visitor greeting on LCD. Custom message per button press.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/uno-r3-ch340g-atmega328p-board-arduino-compatible\"\u003eArduino Uno R3\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/tactile-button-pack-10x-6mm-switches-with-colored-caps-compoden\"\u003eTactile Button\u003c\/a\u003e x3\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/active-buzzer-dc-3-5v-85db-sounder-module-for-arduino-raspberry-pi\"\u003eActive Buzzer\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/16x2-lcd-display-module-16x2-character-blue-backlight\"\u003e16x2 LCD\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/i2c-backpack-pcf8574-i2c-adapter-for-lcd-displays\"\u003eI2C Backpack\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e10kΩ Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/resistor-variety-pack-100-pcs-10-values-14w-carbon-film\"\u003e220Ω Resistors\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/breadboard-standard-bundle-830400-tie-points-for-prototyping\"\u003e400-pt Breadboard\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-M Wires x20\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/9v-battery-snap-connector-with-15cm-wires-compoden\"\u003e9V Battery Snap\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Digital Doorbell with Name Display?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Digital Doorbell with Name Display includes all components needed: Arduino Uno R3, Tactile Button, Active Buzzer, 16, I2C Backpack and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Digital Doorbell with Name Display?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Beginner level makers, suitable for ages 5-15. Push button rings buzzer and displays visitor greeting on LCD. Custom message per button press. Estimated build time is 2-3 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Digital Doorbell with Name Display online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Digital Doorbell with Name Display is available online at Compoden (compoden.com), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 days.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53455345713517,"sku":"CDN-KIT-0207","price":820.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/digital-doorbell-with-name-display-7745341.png?v=1790778966"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/collections\/budget-picks-5218013.png?v=1785258995","url":"https:\/\/compoden.com\/collections\/budget-picks.oembed?page=17","provider":"Compoden","version":"1.0","type":"link"}