{"title":"Arduino Kits","description":"\u003cp\u003eThe world's most popular way to learn and build electronics. Arduino is the friendly, well-documented platform behind millions of projects — and this collection covers it end to end: starter kits, sensor kits, robotics, IoT, and full project builds for the \u003cstrong\u003eUno, Nano, and Mega\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eEvery kit includes the board, parts, and a guide, so whether it's your first blink sketch or a multi-sensor robot, you start building instead of sourcing.\u003c\/p\u003e\u003ch3\u003eWhich Arduino board?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUno\u003c\/strong\u003e — the classic first board, easiest to learn on.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNano\u003c\/strong\u003e — same power, breadboard-friendly and compact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMega\u003c\/strong\u003e — many more pins for bigger builds.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFast shipping across India, Cash on Delivery, GST invoice.\u003c\/p\u003e","products":[{"product_id":"ai-thinker-nodemcu-32s-esp32-dev-board-ipex-wi-fi-ble","title":"Ai-Thinker NodeMCU-32S ESP32 Dev Board (IPEX) – Wi-Fi BLE","description":"\u003ch1\u003eAi-Thinker NodeMCU-32S ESP32 Development Board (IPEX Version)\u003c\/h1\u003e\n\u003cp\u003eThe NodeMCU-32S by Ai-Thinker is an ESP32-based development board with an IPEX antenna connector for external antenna support, offering improved range and signal quality over PCB antenna variants. It integrates Wi-Fi 802.11 b\/g\/n and Bluetooth 4.2\/BLE on a breadboard-friendly module with USB-to-serial programming. Designed for IoT and wireless prototyping, this board delivers dual-core processing at up to 240 MHz, 4MB flash, and extensive GPIO for sensor and actuator projects.\u003c\/p\u003e\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-D0WDQ6 (dual-core Xtensa LX6)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003ctd\u003e520 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash\u003c\/td\u003e\n\u003ctd\u003e4 MB (external SPI)\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 (2.4 GHz), Bluetooth 4.2\/BLE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntenna\u003c\/td\u003e\n\u003ctd\u003eIPEX connector (external antenna); on-board ceramic antenna also available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V logic; 5V via micro USB or Vin pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eWi-Fi weather station uploading data to cloud services\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eBluetooth proximity beacon for indoor positioning\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-home-automation-mqtt-hub\"\u003eHome automation hub controlling relays via MQTT\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-sd-card-data-logger\"\u003ePortable data logger with SD card and sensor shield\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eFully compatible with Arduino IDE and MicroPython firmware. The board works with any 3.3V-level I2C, SPI, or UART peripherals. It pairs easily with common sensors like DHT22, BME280, or ultrasonic modules. The on-board USB-to-serial (CP2102) allows direct programming from any computer.\u003c\/p\u003e\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003ePower the board via micro-USB (5V) or apply 5–12V to the Vin pin (onboard regulator provides 3.3V). All GPIOs operate at 3.3V—do not exceed this level to avoid damage. The EN pin is pulled high; connect to GND to reset. For the IPEX connector, attach an appropriate 2.4 GHz external antenna for extended range.\u003c\/p\u003e\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino IDE?\u003c\/summary\u003e\u003cp\u003eYes, install the ESP32 board package via Boards Manager, then select \"NodeMCU-32S\" as the board. No extra configuration needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need an external antenna for this IPEX version?\u003c\/summary\u003e\u003cp\u003eAn external antenna is recommended for better range, but the board has a small on-board ceramic antenna that works without one for short-range prototyping.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I power it with a 9V battery?\u003c\/summary\u003e\u003cp\u003eYes, connect a 9V battery to the Vin pin (accepts 5–12V). The onboard regulator provides the necessary 3.3V for the ESP32.\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":53444944757101,"sku":"CDN-0009","price":960.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_b12a10f6-89e5-4c56-937d-09fcda8430ef.jpg?v=1781512079"},{"product_id":"8-channel-5v-relay-shield-for-esp32-30-pin-devkit-v1","title":"8 Channel 5V Relay Shield for ESP32 30 Pin DEVKIT V1","description":"\u003ch1\u003e8 Channel 5V Relay Shield for ESP32 30-Pin DEVKIT V1\u003c\/h1\u003e\n\n\u003cp\u003eThe 8 Channel 5V Relay Board is a plug-and-play shield designed specifically for the ESP32 30-pin DEVKIT V1 development board. It provides eight independent 5V relays, each capable of switching up to 10A at 250VAC or 30VDC, making it perfect for home automation, industrial control, and IoT projects. With onboard optocouplers and driver transistors, it ensures reliable isolation between the ESP32 and high-power circuits.\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\u003eRelay Type\u003c\/td\u003e\n\u003ctd\u003e5V SPDT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eNumber of Channels\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum Switching Load\u003c\/td\u003e\n\u003ctd\u003e10A @ 250VAC \/ 30VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eControl Interface\u003c\/td\u003e\n\u003ctd\u003eDirect stackable header for ESP32 30-pin DEVKIT V1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003ePer-channel optocoupler (PC817 or similar)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIndicator\u003c\/td\u003e\n\u003ctd\u003eRed LED per relay for status\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 automation: Control lights, fans, or appliances with your ESP32 via Wi-Fi.\u003c\/li\u003e\n  \u003cli\u003eIoT plant watering system: Switch water pumps and solenoid valves on schedule.\u003c\/li\u003e\n  \u003cli\u003eSmart garage door controller: Automate door open\/close with relay logic.\u003c\/li\u003e\n  \u003cli\u003eIndustrial machine control: Interface with contactors for motor control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis board is engineered to stack onto ESP32 30-pin DEVKIT V1 boards. It may also work with other ESP32 dev boards that share the same pinout—always verify pin mapping before use. For non-ESP32 setups, the relay inputs can be manually wired to any 5V microcontroller like Arduino Uno or Mega using jumper wires. The relay coils require 5V, so ensure your power source can deliver sufficient current when activating multiple relays.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eStack the shield onto the ESP32 DEVKIT V1, aligning the 30-pin headers. The relays are active LOW: they energize when the corresponding GPIO outputs LOW (0). Each channel has a jumper to assign a GPIO pin. To avoid voltage drops, power the ESP32 via its USB port or an external 5V supply capable of at least 500mA if all relays are driven simultaneously. Always use appropriately rated wires and secure connections at the screw terminals.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with ESP32 38-pin boards?\u003c\/summary\u003e\u003cp\u003eNo, this shield is specifically designed for the 30-pin DEVKIT V1. It will not directly fit 38-pin ESP32 boards due to different pin spacing and header layout.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow much current can each relay handle?\u003c\/summary\u003e\u003cp\u003eEach relay is rated for up to 10A at 250VAC or 30VDC. Do not exceed these ratings to prevent overheating and damage.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I power the relays from the ESP32 5V pin?\u003c\/summary\u003e\u003cp\u003eYes, but if driving all 8 relays simultaneously, the total current draw may exceed the ESP32's onboard 5V regulator capacity. We recommend using an external 5V supply for full load.\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":53444944953709,"sku":"CDN-0015","price":790.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_a9738294-8ef3-4f59-8a71-6f52ad436001.jpg?v=1781512087"},{"product_id":"industrial-ph-sensor-module-for-arduino-esp32-raspberry-pi","title":"Industrial pH Sensor Module for Arduino, ESP32, Raspberry Pi","description":"\u003ch1\u003eIndustrial Grade Liquid pH Sensor Module for Arduino, ESP32, Raspberry Pi\u003c\/h1\u003e\n\u003cp\u003eThis industrial liquid pH sensor module accurately measures pH from 0 to 14 with ±0.1 pH resolution. Designed for Arduino, ESP32, Raspberry Pi, and other microcontrollers with analog input, it outputs a voltage proportional to pH for real-time monitoring. Ideal for hydroponics, aquaponics, water quality testing, and lab experiments.\u003c\/p\u003e\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\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0-14 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1 pH (at 25°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e0-5V analog (calibrated for pH)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eElectrode Connector\u003c\/td\u003e\n\u003ctd\u003eBNC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0-60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHydroponic nutrient monitoring system\u003c\/li\u003e\n  \u003cli\u003eAquarium pH controller\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-drinking-water-quality-tester-kit-with-esp32-plus-lora\"\u003eDrinking water quality tester\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eIndustrial effluent pH logger\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eCompatible with any microcontroller having analog input pins: Arduino Uno\/Mega\/Nano, ESP32, ESP8266, Raspberry Pi (with external ADC), STM32, and others. Works at 5V logic level; for 3.3V boards, use a voltage divider or ensure ADC tolerance.\u003c\/p\u003e\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the BNC probe interface to the module, then wire VCC to 5V, GND to GND, and analog out (Po) to an ADC pin. For accurate readings, calibrate with buffer solutions (pH 4.01 and 6.86) before first use. The output voltage is typically mV per pH unit, requiring software conversion.\u003c\/p\u003e\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, connect the sensor's analog output to any analog pin (A0-A5) and power with 5V. Use the Arduino's ADC to read pH values after calibration.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often does the electrode need replacement?\u003c\/summary\u003e\u003cp\u003eThe glass electrode typically lasts 1-2 years with proper care. Store in storage solution (3M KCl) when not in use to extend life.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this for continuous water monitoring?\u003c\/summary\u003e\u003cp\u003eYes, it is designed for continuous immersion. Ensure the probe tip stays wet and avoid drying; intermittent cleaning with pH calibration solutions maintains accuracy.\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":53444945084781,"sku":"CDN-0018","price":790.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_57e38c76-34ed-4cb4-a6ce-baf2752bfdcf.jpg?v=1781512091"},{"product_id":"2x-18650-battery-shield-v8-module-for-arduino-and-esp32esp8266","title":"2x 18650 Battery Shield V8 Module for Arduino and ESP32\/ESP8266","description":"\u003ch1\u003e2x 18650 Battery Shield V8 Module – Dual Battery Power for Arduino and ESP Boards\u003c\/h1\u003e\u003cp\u003eThe 2x 18650 Battery Shield V8 Module is a compact power solution that holds two 18650 lithium-ion cells and converts their output to stable 5V and 3.3V rails. Designed for direct stacking on Arduino boards or wiring to ESP32\/ESP8266, it enables portable and wireless projects without tethering to a USB supply. Built-in protection circuits prevent over-discharge, over-current, and short circuits, ensuring safe operation for your microcontroller and peripherals.\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\u003eBattery Type\u003c\/td\u003e\n\u003ctd\u003e2 x 18650 Li-ion (3.7V nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC (boost) and 3.3V DC (LDO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Output Current\u003c\/td\u003e\n\u003ctd\u003e1A at 5V, 800mA at 3.3V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOver-discharge, over-current, short circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn\/Off Switch\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e53mm x 30mm x 20mm\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\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003ePortable weather station with ESP32 and BME280 sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-bluetooth-controlled-car\"\u003eBluetooth-controlled RC car using Arduino Nano and motor driver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/arduino-nano-33-iot-data-logging-project-kit\"\u003eIoT environmental monitor with ESP8266 and cloud data logging\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eMobile RFID access control system with Arduino Uno\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis shield connects directly to Arduino Uno, Mega, and Nano boards by stacking onto the power and ICSP headers. For ESP32 DevKit and ESP8266 NodeMCU, use jumper wires to connect 5V to Vin, 3.3V to 3.3V, and GND to GND. It operates with standard 18650 cells providing 3.7–4.2V each, and the onboard regulator handles efficient conversion for all common 5V and 3.3V logic.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eWhen stacking on an Arduino, align the headers carefully—the shield uses the ICSP port for additional power routing. For ESP boards, confirm polarity before connecting: red wire to positive 5V output, black to GND. Do not insert batteries while the switch is on, and always match the positive terminals to the marked + symbols on the holder.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with ESP32?\u003c\/summary\u003e\u003cp\u003eYes, the shield outputs 5V and 3.3V that match the Vin and 3.3V pins on ESP32 development boards. Just connect with jumper wires.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes this shield charge the batteries?\u003c\/summary\u003e\u003cp\u003eNo, it is a battery holder with voltage regulation only. You must charge 18650 cells with an external charger before inserting them.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat type of batteries should I use?\u003c\/summary\u003e\u003cp\u003eUse any standard 18650 lithium-ion cells with a nominal voltage of 3.7V. Unprotected flat-top cells fit best; button-top may be tight.\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":53444945281389,"sku":"CDN-0023","price":480.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_5af9cb24-9c47-4995-8c83-7b734bfb223a.jpg?v=1781512092"},{"product_id":"esp32-wroom-32-wifi-ble-bluetooth-mcu-module-compoden","title":"ESP32 WROOM-32 WiFi BLE Bluetooth MCU Module | Compoden","description":"\u003ch1\u003eESP32 WROOM-32 WiFi BLE Bluetooth MCU Module with 4MB Flash\u003c\/h1\u003e\n\n\u003cp\u003eThe ESP32 WROOM-32 is a low-power microcontroller module with integrated WiFi and Bluetooth\/BLE connectivity. It's ideal for IoT devices, smart home automation, and portable battery-powered projects. Its dual-core processor and rich peripheral set make it a versatile choice for both beginners and advanced developers.\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-D0WDQ6 (dual-core Xtensa LX6)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e240 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e4 MB (Quad SPI)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003ctd\u003e520 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWiFi\u003c\/td\u003e\n\u003ctd\u003e802.11 b\/g\/n (2.4 GHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003ev4.2 BR\/EDR and BLE\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGPIO Pins\u003c\/td\u003e\n\u003ctd\u003e34 (some shared with other functions)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e2.3V to 3.6V (typically 3.3V)\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\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eWi-Fi weather station that uploads data to the cloud\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-bluetooth-controlled-car\"\u003eBluetooth-controlled robot or car\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eHome automation hub to control lights, switches, and sensors\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-battery-powered-nano-mesh-node\"\u003eBattery-powered IoT sensor node for temperature, humidity, or motion\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works with the Arduino IDE via the ESP32 board package, as well as ESP-IDF and MicroPython. It's compatible with common prototyping boards and can be integrated into custom PCBs. Pair it with an external 3.3V regulator and USB-to-serial adapter for development.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eProvide a stable 3.3V supply capable of at least 500mA. The EN pin must be pulled high for normal operation. For initial programming, connect GPIO0 to ground while resetting to enter download mode. Keep antenna area clear of metal for best wireless performance.\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 3-5 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 ESP32 WROOM-32 cannot plug directly into an Arduino Uno shield, but it can be programmed using the Arduino IDE with the ESP32 board package installed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the typical Wi-Fi range?\u003c\/summary\u003e\u003cp\u003eIn open air with the onboard ceramic antenna, expect around 100 meters line‑of‑sight. Walls and interference will reduce this.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it come with headers soldered?\u003c\/summary\u003e\u003cp\u003eNo, this is a bare module. You will need to solder it to a breakout board or your own PCB.\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":53444945674605,"sku":"CDN-0029","price":280.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_a5d7616d-8712-40bf-8cf3-c918dce42997.jpg?v=1781512100"},{"product_id":"analog-tds-water-quality-meter-v10-sensor-for-arduino","title":"Analog TDS Water Quality Meter V1.0 Sensor for Arduino","description":"\u003ch1\u003eAnalog TDS Water Quality Meter V1.0 Sensor for Arduino\u003c\/h1\u003e\u003cp\u003eThe Analog TDS Water Quality Meter V1.0 is a sensor module designed to measure the total dissolved solids (TDS) in water. It outputs an analog voltage proportional to the TDS value, making it easy to interface with Arduino and other microcontrollers. Commonly used in hydroponics, aquariums, and water purification systems.\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\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V - 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e0 - 2.3V analog\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0 - 1000 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±10% F.S. at 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe Connector\u003c\/td\u003e\n\u003ctd\u003e2-pin JST\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoard Dimensions\u003c\/td\u003e\n\u003ctd\u003e42 x 32 mm\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\u003eHydroponic nutrient solution monitor\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/aquarium-water-quality-monitor-kit-with-arduino-tds-and-temp\"\u003eAquarium water quality checker\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eHome water purifier output verification\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/esp32-pool-water-quality-kit\"\u003ePool or spa water quality indicator\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis sensor works with any board that has an analog input, including Arduino Uno, Mega, Nano, and ESP32. It outputs 0–2.3V, compatible with 3.3V and 5V logic. For Raspberry Pi, an ADC is required.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to 5V, GND to GND, and the signal wire to an analog pin (e.g., A0). No pull-up resistor is needed. Keep the probe dry between uses for accuracy.\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 3-5 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, simply connect the sensor output to any analog pin on the Uno and read the voltage to calculate TDS.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it require calibration?\u003c\/summary\u003e\u003cp\u003eOut of the box, it provides a linear output, but calibration with a known TDS solution is recommended for precise readings.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow long does the probe last?\u003c\/summary\u003e\u003cp\u003eThe graphite probe heads have a typical lifespan of 1-2 years under normal use, depending on water hardness.\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":53444945772909,"sku":"CDN-0032","price":390.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/download_4e9960b9-49ed-4502-8740-8ec78d8e365c.jpg?v=1781523639"},{"product_id":"arduino-uno-q-4gb-sbc-abx00173","title":"Arduino UNO Q 4GB SBC - ABX00173","description":"\u003ch1\u003eArduino UNO Q 4GB Single Board Computer — Quad-Core, Wi-Fi, Bluetooth\u003c\/h1\u003e\n\n\u003cp\u003eThe Arduino UNO Q is a powerful single board computer designed for embedded Linux applications. With a quad-core processor and 4GB of DDR4 RAM, it handles multitasking and multimedia tasks effortlessly. Ideal for IoT gateways, home automation, and prototyping, it maintains the familiar Arduino ecosystem with added computational power.\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\u003eProcessor\u003c\/td\u003e\n\u003ctd\u003eQuad-core ARM Cortex-A72 1.5GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRAM\u003c\/td\u003e\n\u003ctd\u003e4GB DDR4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003e16GB eMMC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnectivity\u003c\/td\u003e\n\u003ctd\u003e2.4\/5GHz Wi-Fi, Bluetooth 5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003eHDMI 2.0, 2x USB 3.0, USB-C power\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGPIO\u003c\/td\u003e\n\u003ctd\u003e40-pin header compatible with UNO shields\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\u003e\u003ca href=\"\/products\/kit-home-automation-mqtt-hub\"\u003eIoT home automation hub with MQTT and Node-RED\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-pi-4-retro-gaming-console\"\u003eRetro gaming console using EmulationStation\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eNetwork-attached storage (NAS) with OpenMediaVault\u003c\/li\u003e\n  \u003cli\u003eAI-powered robot controller with OpenCV and TensorFlow Lite\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with Arduino IDE for programming the microcontroller unit. Compatible with Arduino shields via the 40-pin GPIO header, which follows the UNO layout. Runs Linux distributions like Arduino Linux or Debian, and can interface with sensors and actuators using standard libraries.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eUse a 5V 3A USB-C power supply. The GPIO operates at 3.3V logic — ensure external devices match this voltage level. For I2C communication, add pull-up resistors on SDA and SCL lines if not already present on the sensor module.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino shields?\u003c\/summary\u003e\u003cp\u003eYes, the 40-pin GPIO header follows the UNO layout, allowing most standard shields to work without modification.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I run Python on this board?\u003c\/summary\u003e\u003cp\u003eYes, it supports Python and other languages. You can install libraries like RPi.GPIO for GPIO control.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat OS comes pre-installed?\u003c\/summary\u003e\u003cp\u003eThe board ships with Arduino Linux preinstalled on the eMMC, ready to boot out of the box.\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":53444945936749,"sku":"CDN-0036","price":6550.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_c3e35f24-bf95-4039-bc00-461dd300809d.jpg?v=1781512109"},{"product_id":"adk-usb-host-shield-for-arduino-add-usb-device-support","title":"ADK USB Host Shield for Arduino – Add USB Device Support","description":"\u003ch1\u003eADK USB Host Shield – Add USB Host Capability to Arduino\u003c\/h1\u003e\u003cp\u003eThe ADK USB Host Shield allows your Arduino board to function as a USB host, enabling direct connection of USB devices like keyboards, mice, and game controllers. Based on the MAX3421E chip, it handles the USB protocol and communicates with the Arduino via SPI. Ideal for HID and Android ADK projects.\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\u003eUSB Host Controller\u003c\/td\u003e\n\u003ctd\u003eMAX3421E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Arduino Boards\u003c\/td\u003e\n\u003ctd\u003eUno, Mega 2560, Leonardo, Due (3.3V tolerant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB Port\u003c\/td\u003e\n\u003ctd\u003eUSB-A female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLogic Level\u003c\/td\u003e\n\u003ctd\u003e5V (3.3V regulator for MAX3421E)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eSPI (default pins: D10 SS, D11 MOSI, D12 MISO, D13 SCK)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Devices\u003c\/td\u003e\n\u003ctd\u003eHID (keyboards, mice), hubs, game controllers, ADK devices\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\u003e\u003ca href=\"\/products\/esp8266-d1-mini-data-logging-project-kit\"\u003eUSB keyboard input for data logging or interactive installations.\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eConnect a game controller to pilot a robot or play retro games.\u003c\/li\u003e\n\u003cli\u003eUse a USB flash drive for file storage with the USB mass storage library.\u003c\/li\u003e\n\u003cli\u003eCreate Android Open Accessory projects to interface with smartphones and tablets.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis shield is designed for Arduino Uno R3, Mega 2560, and Due. It uses the standard SPI pins, but on Leonardo or Micro, the SPI pins are located on the ICSP header rather than D11-D13, so wiring adjustments are needed. The MAX3421E operates at 3.3V with an onboard regulator, making it safe for 3.3V boards. It works with a wide range of low-speed and full-speed USB devices.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eStack the shield directly onto the Arduino headers. For the Due, nothing extra is needed as it's 3.3V tolerant. When using a USB hub, consider external power if the total current draw exceeds 500mA. Install the USB Host Shield Library for Arduino to get started quickly.\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 3-5 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, it is plug-and-play with the Uno R3. Just stack it on and use the USB Host Shield Library.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I connect multiple USB devices at once?\u003c\/summary\u003e\u003cp\u003eYes, by using a USB hub. However, ensure the hub is powered if the devices draw more than 100mA total.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it work with USB 3.0 flash drives?\u003c\/summary\u003e\u003cp\u003eUSB 3.0 devices are backward compatible in most cases, but they may require more power. A powered hub is recommended.\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":53444945969517,"sku":"CDN-0034","price":580.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_cedb1e24-8e9c-4f6c-900b-462d4a8a139a.jpg?v=1781512110"},{"product_id":"elecrow-crowtail-nfc-20-rfid-reader-module-arduino-iot","title":"Elecrow Crowtail NFC 2.0 RFID Reader Module - Arduino \u0026 IoT","description":"\u003ch1\u003eElecrow Crowtail NFC 2.0 RFID Reader Module - Read\/Write 13.56MHz NFC Tags\u003c\/h1\u003e\n\n\u003cp\u003eThe Elecrow Crowtail NFC 2.0 is an RFID reader module based on the PN532 chip, designed for easy integration with Arduino, ESP32, Raspberry Pi, and other IoT platforms. It supports reading and writing of 13.56MHz NFC tags including MIFARE, NTAG, and FeliCa. The Crowtail connector allows plug-and-play connection without soldering, making it ideal for prototyping access control systems, interactive installations, and contactless payment solutions.\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\u003eChipset\u003c\/td\u003e\n\u003ctd\u003eNXP PN532\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V (5V tolerant on data pins)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCommunication Interfaces\u003c\/td\u003e\n\u003ctd\u003eI2C, SPI, UART (selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Frequency\u003c\/td\u003e\n\u003ctd\u003e13.56 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRead\/Write Distance\u003c\/td\u003e\n\u003ctd\u003eUp to 5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupported Standards\u003c\/td\u003e\n\u003ctd\u003eISO\/IEC 14443 A\/B, FeliCa, NFCIP-1\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\u003e\u003ca href=\"\/products\/kit-servo-door-lock\"\u003eNFC door lock using an Arduino and solenoid\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eContactless attendance system for schools or offices\u003c\/li\u003e\n  \u003cli\u003eMobile payment terminal prototype with a screen\u003c\/li\u003e\n  \u003cli\u003eInteractive product display that reads NFC tags to show info\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module is compatible with any microcontroller that supports I2C, SPI, or UART communication. It works seamlessly with Arduino Uno, Mega, Nano, ESP8266, ESP32, and Raspberry Pi. When using 5V systems, the module’s logic-level conversion allows safe connection, but for 3.3V boards, no level shifting is needed.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eFor I2C connection (default), connect the module's VCC to 3.3V (or 5V if using a 5V board), GND to GND, SDA to SDA, and SCL to SCL. Ensure the I2C pull-up resistors are present (usually internal on Arduino boards). If using SPI, select the SS pin accordingly.\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 3-5 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, the Crowtail NFC 2.0 works with Arduino Uno out of the box. Connect via I2C using the provided Crowtail cable to the corresponding I2C pins (A4 for SDA, A5 for SCL).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it write data to NFC tags?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The PN532 chip supports read and write operations for most NFC tag types, including NTAG215 and MIFARE Classic, using libraries like Adafruit PN532.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum reading distance?\u003c\/summary\u003e\u003cp\u003eThe typical reading distance is 3–5 cm, depending on the tag size and antenna design. For optimal performance, ensure no metal objects are behind the tag.\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":53444946035053,"sku":"CDN-0038","price":1530.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_db4e9e30-f9c0-46f1-98d8-8944541fc4bd.jpg?v=1781512111"},{"product_id":"arduino-uno-r4-wifi-abx00162-single-board-computer-development-board","title":"Arduino UNO R4 WiFi ABX00162 Single Board Computer Development Board","description":"\u003ch1\u003eArduino UNO R4 WiFi Single Board Computer (ABX00162)\u003c\/h1\u003e\n\n\u003cp\u003eThe Arduino UNO R4 WiFi is a powerful single board computer that blends the classic UNO form factor with a modern Renesas RA4M1 microcontroller and an onboard ESP32-S3 module for WiFi and Bluetooth connectivity. Designed for IoT prototyping, it offers enhanced processing, expanded memory, and seamless wireless communication, making it a direct drop-in upgrade for existing UNO projects.\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\u003eRenesas RA4M1 (Arm Cortex-M4)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e48 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSRAM \/ Flash\u003c\/td\u003e\n\u003ctd\u003e256 KB \/ 1 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnectivity\u003c\/td\u003e\n\u003ctd\u003eESP32-S3 module (WiFi 802.11 b\/g\/n, Bluetooth 5.0)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUSB\u003c\/td\u003e\n\u003ctd\u003eUSB-C for programming and power\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 digital, 6 analog, 3.3-5V logic tolerant\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\u003e\u003ca href=\"\/products\/wifi-weather-station-with-esp8266-oled-display-kit\"\u003eWiFi-enabled weather station with cloud data logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-bluetooth-home-automation-kit-with-arduino-nano-plus-flex-sensors\"\u003eHome automation system with Bluetooth and smartphone control\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eWireless robot or drone using the ESP32-S3 for low-latency control\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-esp32-mqtt-home-sensor-network\"\u003eIoT sensor network bridging to MQTT or web dashboards\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eFully compatible with the Arduino UNO pinout and most existing shields. The RA4M1 operates at 5V, ensuring legacy shields work out of the box. Programming is done via USB-C using the Arduino IDE 2.0 or higher. Also compatible with ESP32-S3 firmware for standalone wireless applications.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eFor basic use, connect via USB-C to your computer for programming and power. External power (7-12V) can be supplied to the barrel jack. No additional wiring is required for WiFi\/Bluetooth—the ESP32-S3 is internally connected. When driving external loads, respect the per-pin current limit of 8mA and total board limit of ~200mA from the 5V rail.\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 3-5 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 Arduino UNO R4 WiFi is officially supported in Arduino IDE 2.0 and newer, with all necessary board files available via the Boards Manager.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use standard UNO shields with this board?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The UNO R4 maintains the same 5V logic level and pin headers as the classic Uno, so shields for servo control, LCD, and sensors work without modification.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the WiFi need an external antenna?\u003c\/summary\u003e\u003cp\u003eNo. The ESP32-S3 module includes an integrated PCB antenna that provides reliable wireless connectivity for typical indoor and short-range outdoor use.\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":53444946100589,"sku":"CDN-0041","price":4880.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_21ed90c4-21b5-4c17-87ff-b13db95575fa.jpg?v=1781512115"},{"product_id":"official-arduino-leonardo-r3-development-board-with-pre-soldered-headers","title":"Official Arduino Leonardo R3 Development Board with Pre-Soldered Headers","description":"\u003ch1\u003eOfficial Arduino Leonardo R3 Development Board with Pre-Soldered Headers\u003c\/h1\u003e\n\n\u003cp\u003eThe Arduino Leonardo R3 is a microcontroller board based on the ATmega32u4 chip, featuring built-in USB communication that allows it to emulate a keyboard, mouse, or serial device. Its 20 digital I\/O pins, 12 analog inputs, and 16 MHz clock speed make it ideal for interactive projects and rapid prototyping. The pre-soldered headers let you start building immediately without any soldering.\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\u003eATmega32u4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e20 (7 PWM, 12 analog)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e32 KB (4 KB used by bootloader)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003ctd\u003e2.5 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e16 MHz\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\u003eCustom USB game controller for retro gaming emulators\u003c\/li\u003e\n  \u003cli\u003eMIDI instrument interface for music production\u003c\/li\u003e\n  \u003cli\u003eAutomated keyboard shortcuts for productivity workflows\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-pi-zero-w-mqtt-home-sensor-hub\"\u003eSmart home sensor hub with serial-over-USB data logging\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe Leonardo works seamlessly with the Arduino IDE on Windows, macOS, and Linux. It is electrically compatible with most Arduino shields designed for 5V operation and supports the same library ecosystem as the Uno. Common pairings include motor drivers, relay modules, and sensor shields that use the standard Arduino pinout.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eAll male header pins are pre-soldered, so you can directly insert the board into a breadboard or connect jumper wires. There is no need for external pull-up resistors on the I2C lines; the board includes internal pull-ups that can be enabled in software. The Micro USB port provides both power and programming.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Windows 11?\u003c\/summary\u003e\u003cp\u003eYes, the Leonardo is fully compatible with Windows 11. Install the Arduino IDE and the necessary drivers will load automatically when you connect the board via USB.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does the Leonardo differ from the Arduino Uno?\u003c\/summary\u003e\u003cp\u003eThe Leonardo uses the ATmega32u4 chip, which has built-in USB communication, allowing it to emulate a keyboard or mouse. The Uno requires an external USB-to-serial chip and does not support native USB HID without extra software.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I power the board with a 9V battery?\u003c\/summary\u003e\u003cp\u003eYes, the Leonardo can be powered via the Vin pin with 7-12V. A 9V battery works, but ensure the connector polarity matches the board: positive to Vin, ground to GND.\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":53444946133357,"sku":"CDN-0044","price":1850.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_9b204906-71ee-4b1d-9d56-17d7cdf959d1.jpg?v=1781512116"},{"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 3-5 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":280.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_561f6754-7db5-44a7-bfb5-79e57171b826.jpg?v=1781512121"},{"product_id":"arduino-usb-a-to-b-cable-1m-for-uno-mega","title":"Arduino USB A to B Cable 1M for UNO MEGA","description":"\u003ch1\u003eUSB A to B Cable for Arduino UNO\/MEGA – 1 Meter\u003c\/h1\u003e\n\n\u003cp\u003eThis USB A to B cable connects your Arduino UNO or MEGA board to a computer for programming and data transfer. The 1-meter length offers flexibility while keeping a clean workspace. It supports reliable USB 2.0 speeds and is a direct replacement for the standard Arduino programming cable.\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\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eUSB-A male to USB-B male\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e1 meter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eData Transfer Rate\u003c\/td\u003e\n\u003ctd\u003eUSB 2.0, up to 480 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShielding\u003c\/td\u003e\n\u003ctd\u003eBraided and foil\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWire Gauge\u003c\/td\u003e\n\u003ctd\u003e28 AWG data, 24 AWG power\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eArduino UNO, MEGA, other USB-B devices\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\u003eUpload code to Arduino UNO or MEGA boards from your laptop\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp8266-d1-mini-data-logging-project-kit\"\u003eEstablish serial communication for debugging and data logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003ePower your Arduino board via USB for prototyping without external supply\u003c\/li\u003e\n  \u003cli\u003eReplace lost or damaged cables for CNC machines or 3D printers with USB-B ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis cable works with any device featuring a standard USB-B female port, including Arduino UNO, Arduino MEGA 2560, and many printers. It is not compatible with Arduino Nano (mini-USB) or Arduino Micro (micro-USB). It uses standard USB 2.0 protocol and is backward compatible with USB 1.1.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eSimply plug the USB-A end into your computer's USB port and the USB-B end into the Arduino board. Ensure the connector is fully inserted to avoid intermittent connections. No additional drivers are needed as it is a standard cable.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Nano?\u003c\/summary\u003e\u003cp\u003eNo, Arduino Nano uses a mini-USB connector, not USB-B. This cable is designed for boards with a full-size USB-B port like UNO and MEGA.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum data transfer speed?\u003c\/summary\u003e\u003cp\u003eThe cable supports USB 2.0 speeds of up to 480 Mbps, which is more than sufficient for programming and serial data with Arduino boards.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this cable for charging?\u003c\/summary\u003e\u003cp\u003eYes, it can carry power, but the current is limited by your USB port. It is fine for powering an Arduino board during prototyping.\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":53444946329965,"sku":"CDN-0050","price":75.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_7585c4b1-8cd1-43fb-b363-b1031fc4e029.jpg?v=1781512122"},{"product_id":"arduino-science-kit-rev3-akx00045-physics-lab-sensors","title":"Arduino Science Kit Rev3 AKX00045 - Physics Lab Sensors","description":"\u003ch1\u003eArduino Science Kit Rev3 (AKX00045) – Physics Lab with Nano 33 BLE Sense\u003c\/h1\u003e\u003cp\u003eThe Arduino Science Kit Rev3 is an all-in-one educational package built around the Arduino Nano 33 BLE Sense, designed for conducting physics and science experiments. It combines a powerful microcontroller with an array of onboard sensors and a dedicated carrier board, enabling students and makers to explore concepts like motion, light, sound, and temperature. No prior electronics experience is needed—just connect, experiment, and analyze data in real time via the Arduino Science Journal app.\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\u003eMicrocontroller\u003c\/td\u003e\n\u003ctd\u003enRF52840 (ARM Cortex-M4 at 64 MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOnboard Sensors\u003c\/td\u003e\n\u003ctd\u003e9-axis IMU (accel\/gyro\/mag), temperature, humidity, pressure, light, gesture, proximity, color, microphone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectivity\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.0 BLE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit Contents\u003c\/td\u003e\n\u003ctd\u003eNano 33 BLE Sense, Science carrier board, micro USB cable, 2x silicone pipes, silicone \u0026amp; plastic straws, pH paper, stand, hook-and-loop strap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e5V via USB or external battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible App\u003c\/td\u003e\n\u003ctd\u003eArduino Science Journal (iOS \u0026amp; Android)\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\u003eMeasure acceleration and gravity during a pendulum swing\u003c\/li\u003e\n\u003cli\u003eRecord temperature and humidity changes inside a terrarium\u003c\/li\u003e\n\u003cli\u003eAnalyze sound frequency and amplitude using the onboard microphone\u003c\/li\u003e\n\u003cli\u003eInvestigate light absorption and color mixing with the RGB sensor\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe kit includes the Arduino Nano 33 BLE Sense preloaded with firmware, so no additional board is required. It connects wirelessly to smartphones and tablets via Bluetooth for use with the Arduino Science Journal app (iOS\/Android). USB connection to a computer enables advanced programming through the Arduino IDE. Typical pairings include Windows, macOS, and Chromebook environments for data logging.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eThe carrier board provides plug-and-play access to all sensors through Grove connectors and pre-soldered headers—no soldering required. Simply attach the Nano 33 BLE Sense onto the carrier, connect the micro USB cable for power or programming, and you’re ready. External sensors or outputs can be added via the spare Grove ports if desired.\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 3-5 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\u003eNo, the Science Kit Rev3 relies on the Nano 33 BLE Sense and its specific sensors; it is not designed to work with an Uno.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDo I need to solder anything?\u003c\/summary\u003e\u003cp\u003eAll connections are solderless—the carrier board uses pre-soldered female headers and Grove connectors for easy assembly.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat age range is this kit suitable for?\u003c\/summary\u003e\u003cp\u003eRecommended for ages 11+ with adult supervision, ideal for middle school to university-level physics demonstrations.\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":53444946362733,"sku":"CDN-0052","price":23040.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_40e29c46-aec2-4208-a03a-42f1c1d60b02.jpg?v=1781512123"},{"product_id":"official-arduino-uno-r4-minima-made-in-india-compoden","title":"Official Arduino UNO R4 Minima - Made in India | Compoden","description":"\u003ch1\u003eOfficial Arduino UNO R4 Minima - Made in India\u003c\/h1\u003e\n\n\u003cp\u003eThe Arduino UNO R4 Minima is the latest evolution of the classic UNO form factor, now built around a 32-bit Renesas RA4M1 ARM Cortex-M4 microcontroller running at 48 MHz. It retains the familiar 5V operating voltage and pinout, making it a direct upgrade for most UNO R3 projects while offering more memory, faster processing, and modern connectivity. This official board is manufactured in India under Arduino’s license, ensuring genuine quality with local availability.\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\u003eRenesas RA4M1 (ARM Cortex-M4)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 (6 PWM)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e6 (14-bit ADC)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e256 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003ctd\u003e32 KB\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\u003e\u003ca href=\"\/products\/kit-pi-zero-w-mqtt-home-sensor-hub\"\u003eHome automation hub with relay control and sensor monitoring\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-line-following-robot\"\u003eLine-following or obstacle-avoidance robot\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-sd-card-data-logger\"\u003eEnvironmental data logger with SD card storage\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eLED matrix display driver using PWM on digital pins\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis board is pin-compatible with the original UNO R3 form factor, so most 5V Arduino shields and sensors work without modification. It integrates seamlessly with the Arduino IDE 2.x and can be programmed via the USB-C port. Common pairings include breadboards, motor drivers, and I2C\/SPI modules operating at 5V.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eAlways connect the board to a stable 5–12V power source via the barrel jack or USB-C. Digital I\/O pins can source up to 20 mA each; for higher loads, use transistors or relays. For I2C communication, pins A4 (SDA) and A5 (SCL) are default—no external pull-ups needed as the RA4M1 has internal ones.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno R3 shields?\u003c\/summary\u003e\u003cp\u003eYes, the R4 Minima maintains the same pinout and 5V logic as the Uno R3, so most shields operate correctly. However, note that the R4’s I2C pins are on a dedicated header (A4\/A5 still work), and the 3.3V regulator has a higher current limit.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use the Arduino IDE to program it?\u003c\/summary\u003e\u003cp\u003eAbsolutely. Install the latest Arduino IDE 2.x, add 'Arduino Uno R4 Minima' from the Boards Manager, and you can start coding immediately.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the board come with a USB cable?\u003c\/summary\u003e\u003cp\u003eThe board is typically sold without accessories. You will need a USB-C cable for programming and power—available separately on Compoden.\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":53444946395501,"sku":"CDN-0053","price":1000.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_e6f59142-5c7f-4167-a286-8cc97a4f88fa.jpg?v=1781512124"},{"product_id":"screw-shield-v2-terminal-expansion-for-arduino-uno-compoden","title":"Screw Shield V2 Terminal Expansion for Arduino Uno | Compoden","description":"\u003ch1\u003eScrew Shields V2 Terminal Expansion Board for Arduino Uno\u003c\/h1\u003e\u003cp\u003eThe Screw Shields V2 Terminal Expansion Board is a direct plug-on shield for the Arduino Uno that brings all I\/O pins to secure screw terminals. It eliminates the need for jumper wires on breadboards, making your projects more reliable and permanent. Perfect for prototyping and semi-permanent installations, it ensures connections stay firm even in high-vibration environments.\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\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eArduino Uno R3, Duemilanove, and clones with Uno pinout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eScrew terminals (3.5mm pitch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Terminals\u003c\/td\u003e\n\u003ctd\u003e14 digital (D0-D13), 6 analog (A0-A5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Terminals\u003c\/td\u003e\n\u003ctd\u003e5V, 3.3V, GND, Vin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Terminal Rating\u003c\/td\u003e\n\u003ctd\u003e30V DC, 2A per terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e68mm x 53mm x 20mm\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\u003eHome automation system using relays and sensors\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-sd-card-data-logger\"\u003eEnvironmental data logger with SD card and multiple sensors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eRobotics controller for motor drivers and servos\u003c\/li\u003e\n\u003cli\u003eEducational demonstration board for Arduino I\/O\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eDesigned for the Arduino Uno R3, this shield also fits the Duemilanove and most third-party boards with the standard Uno header layout. It will physically connect to an Arduino Mega 2560, but only the Uno-compatible pins (D0-D13, A0-A5) are broken out to terminals. The shield can be stacked with other shields if you use extended pin headers.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eSimply press the shield onto the Arduino Uno, ensuring all pins align. Insert wires into the screw terminals and tighten firmly. For power, use the Vin terminal if supplying voltage through the Arduino's barrel jack, or use the 5V\/GND terminals for logic-level peripherals. Do not exceed the current rating per terminal to avoid damage.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Mega?\u003c\/summary\u003e\u003cp\u003eIt will physically fit, but only the Uno-compatible pins (D0-D13, A0-A5) are available. Additional Mega pins are not connected.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use it for high-current devices?\u003c\/summary\u003e\u003cp\u003eThe screw terminals are rated for up to 2A each, suitable for sensors and small relays. For higher currents, use a dedicated high-current shield or external drivers.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it include a reset button?\u003c\/summary\u003e\u003cp\u003eYes, the V2 version has an onboard reset button for easy programming and restart.\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":53444946461037,"sku":"CDN-0055","price":190.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_eaf1cfc6-d2b9-413f-bb8b-be86aa1e3085.jpg?v=1781512126"},{"product_id":"4x5-matrix-20-key-membrane-keypad-for-arduino","title":"4x5 Matrix 20-Key Membrane Keypad for Arduino","description":"\u003ch1\u003e4x5 Matrix 20-Key Membrane Keypad for Arduino\u003c\/h1\u003e\u003cp\u003eThis is a 4x5 matrix membrane keypad with 20 keys, ideal for user input in Arduino and microcontroller projects. It uses a flexible membrane construction with conductive traces, providing a lightweight, water-resistant input solution. Commonly used in security panels, numeric entry, and menu navigation, it simplifies projects requiring multiple buttons without occupying many I\/O pins.\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\u003eKey Matrix\u003c\/td\u003e\n\u003ctd\u003e4 rows × 5 columns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Keys\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Count\u003c\/td\u003e\n\u003ctd\u003e9-pin male header (2.54mm pitch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e67mm × 76mm × 1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e80mm flexible ribbon\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\u003e\u003ca href=\"\/products\/kit-servo-door-lock\"\u003ePassword-protected door lock system\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eArduino calculator with LCD display\u003c\/li\u003e\n\u003cli\u003eMenu navigation for LCD-based projects\u003c\/li\u003e\n\u003cli\u003eSecurity alarm keypad (arming\/disarming)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eWorks with Arduino Uno, Nano, Mega, ESP32, ESP8266, and any board with 9 digital I\/O pins. 3.3V logic tolerant. Commonly paired with the Arduino Keypad library and character LCD displays for interactive projects.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect the 9-pin header to digital I\/O pins. For standard Keypad library usage, connect rows 0-3 to pins 5-2 and columns 0-4 to pins 9-5 (order flexible). Enable internal pull-ups on row pins; no external resistors needed. Avoid exceeding 5V on I\/O pins.\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 3-5 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, it works perfectly with Arduino Uno using the Keypad library. Connect any 9 digital pins and configure the library accordingly.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes this keypad have tactile feedback?\u003c\/summary\u003e\u003cp\u003eNo, it's a membrane keypad with a smooth, flat surface. Presses require light pressure but no click. It's quiet and durable.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow do I connect it to fewer pins?\u003c\/summary\u003e\u003cp\u003eUse a PCF8574 I2C backpack module to reduce pin count to 2 (SDA\/SCL). Libraries like Keypad_I2C support this.\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":53444946493805,"sku":"CDN-0057","price":75.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_37089503-b7d0-4250-b191-4761c162df3b.jpg?v=1781512128"},{"product_id":"4-20ma-to-5v-converter-for-arduino-industrial-sensors","title":"4-20mA to 5V Converter for Arduino Industrial Sensors","description":"\u003ch1\u003e4-20mA to 5V Converter Module for Arduino \u0026amp; Industrial Sensors\u003c\/h1\u003e\n\n\u003cp\u003eThis module converts standard 4-20mA current loop signals from industrial sensors into a clean 0-5V analog voltage that any microcontroller like Arduino can read directly. It is ideal for connecting pressure transmitters, temperature sensors, or PLC analog outputs to your prototyping setup, eliminating the need for complex external circuitry.\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\u003eInput Signal\u003c\/td\u003e\n\u003ctd\u003e4-20mA current loop\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e0-5V DC (linear mapping)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e7-24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5% full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e25mm x 15mm x 8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Ripple\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;10mV\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\u003eIndustrial pressure monitoring system with Arduino\u003c\/li\u003e\n  \u003cli\u003eWater level sensing using 4-20mA transmitters\u003c\/li\u003e\n  \u003cli\u003ePLC analog output testing and calibration\u003c\/li\u003e\n  \u003cli\u003eTemperature monitoring with RTD or thermocouple transmitters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eCompatible with any 5V microcontroller like Arduino Uno, Mega, or Nano. For 3.3V boards such as ESP32 or Raspberry Pi Pico, use a voltage divider or level shifter to scale the 5V output down. Pairs directly with 4-20mA sensors: pressure transducers, level sensors, and temperature transmitters.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the sensor's 4-20mA positive wire to I+ and negative to I- on the module. Supply the module with 7-24V DC to VCC and GND. The Vout pin provides 0-5V analog output proportional to the input current—connect it to any Arduino analog input pin. No pull-up resistors needed; the module uses an internal 250Ω sense resistor.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it outputs a 0-5V analog signal that connects directly to any Arduino analog input pin. No additional drivers required.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this with a 3.3V microcontroller?\u003c\/summary\u003e\u003cp\u003eYou'll need a voltage divider or level shifter to scale the 5V output down to 3.3V maximum for safe reading. A simple 10k\/20k resistor divider works well.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat sensors can I connect?\u003c\/summary\u003e\u003cp\u003eAny industrial sensor with a 4-20mA current output: pressure transmitters, flow meters, level probes, or temperature transmitters with built-in 4-20mA loops.\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":53444946526573,"sku":"CDN-0062","price":95.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_02bfbf36-7722-4b97-b040-906942789f5a.jpg?v=1781512129"},{"product_id":"rgb-led-module-with-4-pin-header-for-arduino-compoden","title":"RGB LED Module with 4-Pin Header for Arduino | Compoden","description":"\u003ch1\u003eRGB LED Module (4-Pin, Common Cathode) for Arduino\u003c\/h1\u003e\u003cp\u003eThe RGB LED Module is a compact breakout board featuring a common cathode RGB LED with integrated current-limiting resistors. Designed for easy connection to Arduino and compatible microcontroller boards, it allows you to add full-color visual feedback to your projects. Use it for status indicators, ambient lighting, or color-coded signals.\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\u003eLED Type\u003c\/td\u003e\n\u003ctd\u003eCommon Cathode RGB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForward Voltage (Red)\u003c\/td\u003e\n\u003ctd\u003e~2.0V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForward Voltage (Green\/Blue)\u003c\/td\u003e\n\u003ctd\u003e~3.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Current per Color\u003c\/td\u003e\n\u003ctd\u003e20mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Configuration\u003c\/td\u003e\n\u003ctd\u003eR, G, B, GND\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistors\u003c\/td\u003e\n\u003ctd\u003eIntegrated (220Ω each)\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\u003eMood lamp with smooth color transitions\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-battery-voltage-level-indicator\"\u003eStatus indicator for battery level or sensor readings\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eColor-coded alarm system (red for error, green for okay)\u003c\/li\u003e\n\u003cli\u003eInteractive light-up toy or game controller feedback\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis module works with any microcontroller board offering digital I\/O pins, including Arduino Uno, Nano, Mega, and ESP8266\/ESP32. It operates at 5V logic but can be used with 3.3V boards if the LED brightness is acceptable. Common pairings include the Arduino Uno for prototyping and the NodeMCU for IoT color notifications.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect the R, G, B pins to PWM-capable digital outputs on your microcontroller (e.g., pins 9,10,11 on Arduino Uno). The fourth pin is ground. No external resistors are needed. For common cathode modules, ensure the ground pin is connected to the microcontroller's GND.\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 3-5 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 module has a common cathode and built-in resistors, so you can connect R, G, B to any PWM pins on the Uno and the cathode to GND. It works with the standard Arduino IDE without additional libraries.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the pinout of this module?\u003c\/summary\u003e\u003cp\u003eThe module has a 4-pin header: V (common cathode, actually ground), R (red), G (green), B (blue). Some modules label the common as '-' or GND. Check your module's labeling: connect the common to GND, and the R, G, B to PWM pins.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use this with a 3.3V board like ESP32?\u003c\/summary\u003e\u003cp\u003eYes, but the LEDs may shine dimmer at 3.3V logic. The internal resistors are sized for 5V, so at 3.3V the current is lower. For full brightness, you might use a level shifter, but for most applications direct connection works fine.\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":53444946657645,"sku":"CDN-0065","price":25.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_e07dac13-4980-4748-950d-fa0c28d467da.jpg?v=1781512135"},{"product_id":"arduino-data-logger-shield-with-rtc-and-sd-card-slot","title":"Arduino Data Logger Shield with RTC and SD Card Slot","description":"\u003ch1\u003eArduino Data Logger Shield with DS1307 RTC and microSD Slot\u003c\/h1\u003e\n\n\u003cp\u003eThe Arduino Data Logger Shield enables precise time-stamped data logging to a microSD card. It integrates a DS1307 real-time clock (RTC) for accurate timekeeping and an SPI-based SD card interface. Simply stack it onto your Arduino Uno or Mega to start capturing sensor data, GPS coordinates, or event logs with minimal wiring.\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\u003eRTC Chip\u003c\/td\u003e\n\u003ctd\u003eDS1307\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSD Card Support\u003c\/td\u003e\n\u003ctd\u003emicroSD up to 32 GB, FAT16\/FAT32\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRTC Battery\u003c\/td\u003e\n\u003ctd\u003eCR1220 coin cell (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eI2C (RTC), SPI (SD card)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V (supplied by Arduino)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e68.6 x 53.4 mm (standard Arduino shield)\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\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eWeather station with temperature, humidity, and pressure logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp32-gps-tracker-kit-build-a-live-tracking-dashboard\"\u003eGPS tracker that records coordinates to SD card\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/pm2-5-air-quality-monitor-kit\"\u003eLong-term indoor air quality monitor\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eEvent counter with timestamped entries\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis shield is designed for 5V Arduino boards with standard header layout, including Uno, Mega 2560, and Leonardo. The RTC uses the I2C pins (A4\/SDA, A5\/SCL), and the SD card occupies the SPI bus (D10–D13). Ensure pin 10 is set as output in your code for SD functionality. The shield includes a pass-through stacking header for additional modules.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eStack the shield directly onto the Arduino. Insert a CR1220 battery in the holder to maintain RTC time when power is off. Use Arduino’s SD and RTClib libraries for quick integration. No external wiring is needed.\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 3-5 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, the shield is fully compatible with Arduino Uno R3 and later. It aligns with Uno’s pinout and uses I2C on A4\/A5 and SPI on D10–D13.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the shield include a battery for the RTC?\u003c\/summary\u003e\u003cp\u003eNo, the CR1220 coin cell battery is not included; you’ll need to purchase one separately for RTC backup.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum SD card capacity supported?\u003c\/summary\u003e\u003cp\u003eThe shield supports microSD cards up to 32 GB formatted as FAT16 or FAT32, which is sufficient for most data logging applications.\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":53444946821485,"sku":"CDN-0070","price":150.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_2d12e008-9967-48af-aa2d-14922db3ac29.jpg?v=1781512141"},{"product_id":"arduino-shield-breakout-board-pcb-screw-terminal-prototyping-shield","title":"Arduino Shield Breakout Board PCB – Screw Terminal Prototyping Shield","description":"\u003ch1\u003eArduino Shield Breakout Board PCB – Screw Terminal Prototyping Shield\u003c\/h1\u003e\n\n\u003cp\u003eThe Arduino Shield Breakout Board PCB is a prototyping shield that brings all Arduino Uno and Mega pins to screw terminals, enabling secure and solderless connections for your electronics projects. Ideal for prototyping, it simplifies wiring and reduces the risk of loose connections. This shield also includes a prototyping area for adding custom circuits.\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\u003eBoard Type\u003c\/td\u003e\n\u003ctd\u003eShield form factor for Arduino Uno\/Mega\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eScrew terminals, 5mm pitch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePin Count\u003c\/td\u003e\n\u003ctd\u003eBreaks out all digital, analog, power pins\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 68.6mm x 53.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eReset Button\u003c\/td\u003e\n\u003ctd\u003eYes, onboard\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePrototyping Area\u003c\/td\u003e\n\u003ctd\u003eYes, plated through‑hole pads\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 automation control box with wired sensors and actuators\u003c\/li\u003e\n  \u003cli\u003eIndustrial monitoring system with robust screw‑terminal connections\u003c\/li\u003e\n  \u003cli\u003eCustom Arduino‑based data logger with external modules\u003c\/li\u003e\n  \u003cli\u003eEducational projects requiring easy, reliable prototyping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eDesigned for Arduino Uno and Arduino Mega 2560 boards. It stacks directly onto the standard header layout, and works with any 5V logic microcontroller that matches the Uno pinout. For 3.3V boards, ensure logic level compatibility when using the breakout terminals.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003ePlug the shield firmly onto your Arduino, then connect your external wires to the screw terminals. Always disconnect power before wiring, and tighten terminals securely. Each screw terminal can handle up to 2A; avoid exceeding this limit.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Mega?\u003c\/summary\u003e\u003cp\u003eYes, the shield uses the standard header layout shared by Arduino Uno and Mega, so it fits both boards perfectly.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need to solder anything?\u003c\/summary\u003e\u003cp\u003eThe screw terminals provide solderless connections, but the prototyping area is unconnected; you may need to solder components there for custom circuits.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this with a 3.3V Arduino?\u003c\/summary\u003e\u003cp\u003eYes, the shield physically fits, but ensure your external components are compatible with 3.3V logic levels to avoid damage.\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":53444947018093,"sku":"CDN-0075","price":40.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_ce65c03d-c490-4de6-85f7-fcb788da0245.jpg?v=1781512149"},{"product_id":"uno-r3-ch340g-atmega328p-board-arduino-compatible","title":"Uno R3 CH340G ATmega328P Board - Arduino Compatible","description":"\u003ch1\u003eUno R3 CH340G ATmega328P Development Board – Compatible with Arduino\u003c\/h1\u003e\u003cp\u003eThe Uno R3 CH340G ATmega328P development board is an Arduino-compatible microcontroller board based on the ATmega328P chip. It features a CH340G USB-to-serial converter, providing reliable USB connectivity and easy programming via the Arduino IDE. Ideal for prototyping and embedded projects, this board includes 14 digital I\/O pins, 6 analog inputs, and a 16 MHz crystal oscillator.\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\u003eMicrocontroller\u003c\/td\u003e\n\u003ctd\u003eATmega328P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB-to-Serial\u003c\/td\u003e\n\u003ctd\u003eCH340G\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 (6 PWM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e16 MHz\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\u003e\u003ca href=\"\/products\/kit-animated-weather-station-display\"\u003eArduino-based weather station using DHT22 sensor and LCD display\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eMotor control shield for robotics with L298N driver\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-bluetooth-home-automation-kit-with-arduino-nano-plus-flex-sensors\"\u003eHome automation system with relay modules and Bluetooth\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eDIY game controller with joystick and buttons\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis board works seamlessly with the Arduino IDE (select “Arduino Uno” as the board). It is compatible with most Arduino Uno shields and operates at 5V logic, making it suitable for sensors like ultrasonic range finders, temperature sensors, and common modules. For 3.3V sensors, use the onboard 3.3V pin with level shifting if necessary.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect the board to your computer using a USB Type-A to Type-B cable (not included). For external power, use a 7–12V DC adapter via the barrel jack, ensuring proper polarity. Always share a common ground when interfacing with other circuits.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino IDE?\u003c\/summary\u003e\u003cp\u003eYes, it is fully compatible. After installing the CH340 driver, the board will appear as a COM port, and you can select “Arduino Uno” in the IDE.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes this board come with a USB cable?\u003c\/summary\u003e\u003cp\u003eNo, this product is sold without a USB cable. You will need a standard USB A-to-B cable (often used for printers) to connect it to your computer.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I power this board with a 9V battery?\u003c\/summary\u003e\u003cp\u003eYes, a 9V battery connected to the VIN pin or barrel jack will power the board, but ensure it is regulated if needed for stable operation.\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":53444947837293,"sku":"CDN-0086","price":230.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_c9360bf3-c550-4b39-9181-2952fc199cef.jpg?v=1781512156"},{"product_id":"nano-r3-ch340-development-board-arduino-compatible-no-cable","title":"Nano R3 CH340 Development Board – Arduino Compatible (No Cable)","description":"\u003ch1\u003eNano R3 CH340 Development Board – Arduino-Compatible ATmega328P Board (No Cable)\u003c\/h1\u003e\u003cp\u003eThe Nano R3 CH340 is a compact, breadboard‑friendly microcontroller board built around the ATmega328P. It is fully compatible with the Arduino Nano platform and uses the CH340G USB‑to‑serial chip for stable programming and serial communication. This board is perfect for prototyping, robotics, and IoT projects where space is limited and reliability matters.\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\u003eMicrocontroller\u003c\/td\u003e\n\u003ctd\u003eATmega328P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e16 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 (6 PWM capable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e32 KB (2 KB used by bootloader)\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\u003eA Bluetooth‑controlled robot using an HC‑05 module and motor driver\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-cold-chain-temperature-data-logger\"\u003eA temperature and humidity data logger with an OLED display\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-automatic-plant-watering-system\"\u003eAn automatic plant watering system with a soil moisture sensor and pump\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eA gesture‑controlled LED cube using accelerometer input\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe board works with all standard Arduino Nano shields and 5V sensors. It is programmed via the Arduino IDE after installing the CH340 driver (available for Windows, macOS, Linux). Common pairings include breadboards, jumper wires, ultrasonic sensors, and servo motors.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003ePower the board through the Mini‑B USB port or apply 7–12V to the VIN pin. All I\/O pins operate at 5V logic levels; use level shifters when connecting to 3.3V devices. The CH340 chip is auto‑recognized on most systems, but manual driver installation may be needed on older Windows versions. Current per I\/O pin is 40 mA max.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino IDE?\u003c\/summary\u003e\u003cp\u003eYes, it works seamlessly with the Arduino IDE. Simply select “Arduino Nano” under boards and install the CH340 driver if needed.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it require soldering?\u003c\/summary\u003e\u003cp\u003eNo, the board comes with pre‑soldered male pin headers, so you can plug it directly into a breadboard or use jumper wires.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the difference between CH340 and FTDI chips?\u003c\/summary\u003e\u003cp\u003eBoth are USB‑to‑serial converters. The CH340 performs the same function as FTDI chips but at a lower cost; it requires a driver installation to appear as a COM port.\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":53444947902829,"sku":"CDN-0083","price":230.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_31deff1a-052a-470a-8889-fdc98019a673.jpg?v=1781512158"},{"product_id":"voice-recognition-module-v3-with-microphone-for-arduino","title":"Voice Recognition Module V3 with Microphone for Arduino","description":"\u003ch1\u003eVoice Recognition Module V3 with Microphone - Arduino Compatible\u003c\/h1\u003e\u003cp\u003eThe Voice Recognition Module V3 is a compact, self-contained speech recognition board with an integrated microphone, designed for Arduino and other microcontrollers. It can be trained to recognize up to 80 voice commands with high accuracy, enabling hands-free control in your projects. Its UART interface and simple command set make it easy to integrate into home automation, robotics, and assistive technology.\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\u003eWorking Voltage\u003c\/td\u003e\n\u003ctd\u003e4.5V - 5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 40mA (active)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUART (TTL serial, 9600bps default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecognition Accuracy\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;99% under ideal conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoice Commands\u003c\/td\u003e\n\u003ctd\u003eUp to 80 trainable commands\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-board Microphone\u003c\/td\u003e\n\u003ctd\u003eYes, omnidirectional\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\u003e\u003ca href=\"\/products\/control-appliances-with-your-voice-arduino-and-hc-05-home-automation-kit\"\u003eVoice-controlled home automation system (lights, fans, appliances)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eVoice-activated robot or rover\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-servo-door-lock\"\u003eVoice password door lock for security\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eAssistive device for differently-abled individuals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis module works with any 5V microcontroller that has a UART, including Arduino Uno, Mega, Nano, and Leonardo. For 3.3V boards like ESP8266 or Raspberry Pi, use a logic level shifter. It's commonly paired with relay modules, motor drivers, or displays for interactive projects.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to 5V, GND to GND, RX to Arduino pin 3 (software serial), and TX to pin 2. If communication is unreliable, add a 10KΩ pull-up resistor on the RX line. The module draws under 40mA, so standard USB power is sufficient.\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 3-5 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, but you'll need a logic level shifter to convert the Raspi's 3.3V UART to 5V. Connect the module's RX\/TX through a bidirectional level converter.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow do I train custom voice commands?\u003c\/summary\u003e\u003cp\u003eYou can train commands using a USB-to-serial adapter and the manufacturer's PC software, or directly from Arduino code using the provided library and serial commands.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it work in noisy environments?\u003c\/summary\u003e\u003cp\u003eThe module includes noise reduction, but for best accuracy, use it in a quiet space within 1 meter of the speaker. Avoid background music or loud chatter.\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":53444947935597,"sku":"CDN-0087","price":2280.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_7d42dcbb-9c81-48c9-95b4-dec7e873ec4a.jpg?v=1781512161"},{"product_id":"arduino-uno-mega-usb-programming-cable-1m-type-a-to-type-b","title":"Arduino Uno MEGA USB Programming Cable - 1m Type-A to Type-B","description":"\u003ch1\u003eUSB A to B Programming Cable for Arduino Uno\/MEGA – 1 Meter, Durable Data Sync\u003c\/h1\u003e\u003cp\u003eThis is a standard USB 2.0 Type-A to Type-B cable, primarily used for programming and powering Arduino Uno and Arduino MEGA boards. It provides a reliable wired connection between your computer and microcontroller, ensuring stable firmware uploads and serial communication. The cable is 1 meter long, shielded to reduce interference, and built with durable connectors for frequent use.\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\u003eConnector 1\u003c\/td\u003e\n\u003ctd\u003eUSB Type-A (Male)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector 2\u003c\/td\u003e\n\u003ctd\u003eUSB Type-B (Male)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e1 meter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Gauge\u003c\/td\u003e\n\u003ctd\u003e28 AWG (data) \/ 24 AWG (power)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Rate\u003c\/td\u003e\n\u003ctd\u003eUSB 2.0 (up to 480 Mbps)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShielding\u003c\/td\u003e\n\u003ctd\u003eAluminum foil \/ braided shield\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\u003eUpload sketches to Arduino Uno or Mega from your PC or Mac\u003c\/li\u003e\n\u003cli\u003ePower and program an Arduino-based DIY robot or sensor station\u003c\/li\u003e\n\u003cli\u003eConnect a Raspberry Pi to a USB hub that only has Type-B inputs\u003c\/li\u003e\n\u003cli\u003eUse it as a general-purpose data cable for old printers or external drives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis cable works with any device that has a USB Type-B port. It is fully compatible with Arduino Uno R3, Arduino Mega 2560, Arduino Due, and many clones. It also works with older printers, scanners, and some audio interfaces that use the same connector. It supports both data transfer and 5V power delivery as per USB 2.0 standards.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eSimply plug the Type-A end into your computer or USB power supply, and the Type-B end into the Arduino board. The cable requires no additional drivers; the standard USB CDC driver used by Arduino IDE handles the connection automatically. Ensure a firm connection to avoid intermittent resets during upload.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno R3?\u003c\/summary\u003e\u003cp\u003eYes, it perfectly matches the USB Type-B port on the Uno R3 and all earlier versions with the same connector.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use this cable for just power, not data?\u003c\/summary\u003e\u003cp\u003eAbsolutely. It will supply 5V to the Arduino’s USB port, but note that some boards may skip the voltage regulator when powered via USB, so ensure your external circuitry is within safe limits.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it have a ferrite bead for noise suppression?\u003c\/summary\u003e\u003cp\u003eThis cable does not include a ferrite bead, but the shielding is sufficient for typical benchtop use. In high-noise environments, adding a snap-on ferrite core can further reduce EMI.\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":53444948164973,"sku":"CDN-0092","price":30.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_620bd99b-6df6-49b3-bc19-4c85ec00342c.jpg?v=1781512168"},{"product_id":"rp203-mini-thermal-printer-with-rs232-ttl-for-arduino","title":"RP203 Mini Thermal Printer with RS232 \u0026 TTL for Arduino","description":"\u003ch1\u003eRP203 Mini Thermal Printer with RS232 and TTL for Arduino and Raspberry Pi\u003c\/h1\u003e\u003cp\u003eThe RP203 is a compact, low-power thermal printer designed for embedded and portable applications. With both RS232 and TTL serial interfaces, it connects directly to Arduino, Raspberry Pi, and other microcontrollers without complex drivers. No ink or ribbons are needed, making it clean, quiet, and reliable for printing receipts, logs, or labels.\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\u003ePrint Speed\u003c\/td\u003e\n\u003ctd\u003e50 mm\/s max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e203 DPI (8 dots\/mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePaper Width\u003c\/td\u003e\n\u003ctd\u003e58 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterfaces\u003c\/td\u003e\n\u003ctd\u003eRS232, TTL serial (5V tolerant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e5–9V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e110 x 70 x 60 mm\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\u003eDIY point-of-sale receipt printer for a shop or pop-up store\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-soil-sensor-data-logger\"\u003ePortable data logger that outputs sensor readings on paper\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eTicket printing system for events or raffles\u003c\/li\u003e\n\u003cli\u003eInventory label printer for stock management with small barcodes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe TTL interface works directly with 5V Arduino boards like Uno and Mega. For 3.3V systems such as Raspberry Pi or ESP32, use a logic level shifter or ensure the RX pin is 5V tolerant. The RS232 port connects to standard DB9 serial ports on PCs or industrial equipment. It is not USB compatible without an adapter.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eFor TTL, connect the printer’s TX\/RX lines to your microcontroller’s serial pins and provide a stable DC supply. Always join ground from your controller to the printer’s ground. If using RS232, wire directly to a DE-9 connector with correct pinout; typically, pin 2 is RX, pin 3 is TX, and pin 5 is ground.\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 3-5 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, using the TTL interface. Connect the printer’s TX to Raspberry Pi’s RX (GPIO15) and RX to TX (GPIO14) via a level shifter, as the Pi’s pins are 3.3V not 5V tolerant. Then configure the serial port in your code.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat type of paper does it use?\u003c\/summary\u003e\u003cp\u003eStandard 58mm thermal paper rolls are required. These are widely available and inexpensive. No ink is ever needed—the heat-sensitive paper darkens when heated.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I print images or graphics?\u003c\/summary\u003e\u003cp\u003eYes, the printer supports bitmap printing through simple serial commands. You can convert images to monochrome bitmaps and send them line by line. Many libraries for Arduino and Python simplify this process.\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":53444948197741,"sku":"CDN-0093","price":2050.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_30341f18-6b92-41ff-98ac-c0f1468a8897.jpg?v=1781512169"},{"product_id":"2-wheel-smart-car-robot-chassis-kit-diy-for-arduino-raspberry-pi","title":"2 Wheel Smart Car Robot Chassis Kit DIY for Arduino Raspberry Pi","description":"\u003ch1\u003e2 Wheel Smart Car Robot Chassis Kit – DIY Platform for Arduino \u0026amp; Raspberry Pi\u003c\/h1\u003e\u003cp\u003eThe 2 Wheel Smart Car Robot Chassis Kit is a modern DIY platform for building mobile robots with Arduino or Raspberry Pi. It includes a precision-cut acrylic chassis, two geared DC motors with rubber wheels, and a 360-degree rotating ball caster for smooth omnidirectional movement. This kit is ideal for hobbyists, students, and makers who want to explore robotics, line following, or autonomous vehicle projects.\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\u003eChassis Material\u003c\/td\u003e\n\u003ctd\u003eAcrylic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e200mm x 150mm x 3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Diameter\u003c\/td\u003e\n\u003ctd\u003e65mm (rubber tires)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Type\u003c\/td\u003e\n\u003ctd\u003eDC gear motor, 3-6V, 120 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCaster\u003c\/td\u003e\n\u003ctd\u003e360° rotating ball caster\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePayload Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 500g\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 following robot using IR sensors\u003c\/li\u003e\n\u003cli\u003eObstacle avoidance robot with ultrasonic sensor\u003c\/li\u003e\n\u003cli\u003eBluetooth-controlled rover with Arduino\u003c\/li\u003e\n\u003cli\u003eRaspberry Pi camera streamer robot\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis chassis works with popular development boards like Arduino Uno, Mega, Nano, and Raspberry Pi 3\/4. To drive the motors, you need an external motor driver such as L298N or L293D. The motors operate at 3-6V, so a separate power supply (e.g., 2-3 AA batteries or a 7.4V LiPo with regulator) is recommended. Logic power can be drawn from the board's 5V or 3.3V pin while keeping the motor supply isolated.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect each motor's terminals to the output of an H-bridge driver. The driver’s input pins go to digital I\/O on your microcontroller. Use a shared ground between the motor power and logic circuits. Add a 100µF capacitor across the motor terminals to reduce electrical noise.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, you can use any Arduino board with a motor driver shield like L298N to control the motors.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes the kit include a motor driver?\u003c\/summary\u003e\u003cp\u003eNo, the motor driver is sold separately. We recommend the L298N or L293D driver module.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the maximum speed of the robot?\u003c\/summary\u003e\u003cp\u003eSpeed varies with voltage; at 6V, the robot travels approximately 0.5 metres per second.\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":53444948230509,"sku":"CDN-0090","price":610.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_6c6fcb85-31c4-41ff-bef8-e3b429227ec5.jpg?v=1781512171"},{"product_id":"atmega328p-pu-microcontroller-with-arduino-bootloader-compoden","title":"ATmega328P-PU Microcontroller with Arduino BootLoader | Compoden","description":"\u003ch1\u003eATmega328P-PU Microcontroller with Arduino BootLoader – 32KB Flash, 16MHz\u003c\/h1\u003e\n\n\u003cp\u003eThe ATmega328P-PU is a high-performance, low-power 8-bit AVR microcontroller preloaded with the Arduino bootloader. It serves as the brains of countless Arduino boards and allows you to run Arduino sketches directly on a standalone chip without an external programmer. Its wide operating voltage range and ample memory make it suitable for both simple and complex embedded projects.\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\u003eATmega328P-PU\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e32 KB (0.5 KB used by bootloader)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003ctd\u003e2 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003eUp to 20 MHz (typical 16 MHz for Arduino)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e1.8V to 5.5V (5V recommended for 16 MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003e28-pin DIP\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\u003eStandalone Arduino circuit on a breadboard\u003c\/li\u003e\n  \u003cli\u003eCustom Arduino Uno-compatible development board\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-sd-card-data-logger\"\u003eData logger with SD card and sensor modules\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eHome automation controller with relay and Wi-Fi\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis microcontroller is fully compatible with the Arduino IDE and libraries. It can directly replace the chip on an Arduino Uno board or be used in custom PCBs. Common pairings include 16 MHz crystal oscillators, 22pF capacitors, and USB-to-serial adapters like FTDI FT232 for programming.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eFor standalone operation, connect VCC (pin 7) and AVCC (pin 20) to 5V, GND (pins 8 and 22) to ground. Place a 16 MHz crystal between pins 9 and 10 with 22pF capacitors to ground. Add a 10K pull-up resistor on RESET (pin 1). Programming is done via TX (pin 3) and RX (pin 2) using a 5V USB-to-serial converter.\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 3-5 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, it is the identical microcontroller used on the Arduino Uno. You can use it to replace a damaged chip on an Uno or build your own Uno-compatible board.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it come preloaded with the Arduino bootloader?\u003c\/summary\u003e\u003cp\u003eAbsolutely, this ATmega328P-PU ships with the Arduino Uno bootloader already installed, so you can program it directly from the Arduino IDE via a serial connection without an external programmer.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat extra parts are needed for a standalone setup?\u003c\/summary\u003e\u003cp\u003eYou'll need a 16 MHz crystal, two 22pF ceramic capacitors, a 10K ohm resistor for the RESET pull-up, and a 5V power supply. A USB-to-serial converter (like FTDI) is required for uploading sketches.\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":53444948296045,"sku":"CDN-0091","price":360.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_10ad7181-f49f-45b2-a274-a7c60c6cafdb.jpg?v=1781512173"},{"product_id":"35-inch-tft-touch-screen-lcd-module-for-arduino-uno","title":"3.5 inch TFT Touch Screen LCD Module for Arduino UNO","description":"\u003ch1\u003e3.5 inch TFT Touch Screen LCD Module for Arduino UNO\u003c\/h1\u003e\n\n\u003cp\u003eThis 3.5-inch TFT touch screen module delivers a vivid 320x480 color display with resistive touch, designed for direct connection to Arduino UNO. Use it to build interactive menus, data dashboards, or portable game consoles. Its SPI interface only uses a few pins, leaving room for other sensors.\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\u003eDisplay Size\u003c\/td\u003e\n\u003ctd\u003e3.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e320 x 480 pixels\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTouch Type\u003c\/td\u003e\n\u003ctd\u003eResistive\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eSPI (4-wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDriver IC\u003c\/td\u003e\n\u003ctd\u003eILI9486\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V \/ 5V\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\u003eSmart home control panel\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003ePortable weather station with touch controls\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eArduino-based gaming device\u003c\/li\u003e\n  \u003cli\u003eDigital thermostat with graphical UI\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eDesigned as a shield for the Arduino UNO, this module also works with Arduino Mega and other 5V boards having the same pinout. It uses the SPI bus (pins 13, 12, 11, plus control pins), making it easy to integrate with other SPI devices.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003ePlug the module directly onto your Arduino UNO; no external wiring needed if used as a shield. For standalone use, connect VCC to 5V, GND to GND, and SPI pins (SCK, MISO, MOSI) plus CS, DC, and optional RST. Ensure the backlight pin is controlled via PWM if dimming is required.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Mega?\u003c\/summary\u003e\u003cp\u003eYes, it works if you connect the SPI to pins 50-53 and ensure library support for those pin mappings.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this module support capacitive touch?\u003c\/summary\u003e\u003cp\u003eNo, this model uses resistive touch which works with any stylus or fingertip, but does not support multi-touch.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat libraries should I use for graphics?\u003c\/summary\u003e\u003cp\u003eUse the popular GFX and ILI9486 libraries available in the Arduino Library Manager for easy graphics and touch handling.\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":53444948328813,"sku":"CDN-0094","price":1190.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_9b48af4f-d022-43e8-a671-ec29ee46c27d.jpg?v=1781512175"},{"product_id":"l293d-motor-driver-shield-for-arduino-drive-dc-stepper-motors","title":"L293D Motor Driver Shield for Arduino – Drive DC \u0026 Stepper Motors","description":"\u003ch1\u003eL293D Motor Driver Shield for Arduino – Drive Up to 4 DC Motors or 2 Stepper Motors\u003c\/h1\u003e\n\n\u003cp\u003eThe L293D Motor Driver Shield is a dedicated expansion board for Arduino Uno and Mega that simplifies driving DC motors, stepper motors, and even solenoids. Based on the popular L293D chip, it provides four half-H bridges with onboard protection diodes. Ideal for robotics, prototyping, and automation projects requiring multiple motor controls.\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\u003eMotor Channels\u003c\/td\u003e\n\u003ctd\u003e4 DC motors or 2 stepper motors\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage (Logic)\u003c\/td\u003e\n\u003ctd\u003e5V from Arduino\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMotor Supply Voltage\u003c\/td\u003e\n\u003ctd\u003e4.5V to 12V (external)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePeak Current per Channel\u003c\/td\u003e\n\u003ctd\u003e600mA (1.2A peak for 100µs)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eFlyback diodes onboard\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e69 x 53 mm\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\u003e\u003ca href=\"\/products\/kit-line-following-robot\"\u003eLine-following robot car with two DC motors\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-stepper-motor-controller\"\u003eArduino-powered stepper motor clock\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-stepper-motor-controller\"\u003eAutomatic curtain opener using a stepper motor\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eWiFi-controlled rover with obstacle avoidance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis shield is directly compatible with Arduino Uno, Uno R3, and Mega 2560 boards, stacking neatly onto standard pin headers. It operates on 5V logic, so it pairs seamlessly with any 5V microcontroller. For 3.3V systems, use a logic level converter.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect an external power supply (4.5V–12V) to the shield’s power terminal block, and ensure the power jumper is set correctly if powering the Arduino separately. Do not exceed 12V as the L293D may overheat; use a heat sink for sustained high-current loads.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno R3?\u003c\/summary\u003e\u003cp\u003eYes, this motor driver shield is designed to plug directly onto Arduino Uno R3 and uses the standard pinout, leaving no extra wiring needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it drive two stepper motors simultaneously?\u003c\/summary\u003e\u003cp\u003eYes, the shield can control two bipolar stepper motors independently using all four H-bridges, or one stepper and two DC motors.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it require external power for motors?\u003c\/summary\u003e\u003cp\u003eYes, motors must be powered through the external power terminal (4.5V–12V). The Arduino 5V regulator cannot supply enough current for 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":53444948427117,"sku":"CDN-0097","price":150.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_0ca6f011-d3c5-4a3d-9610-5a536a45f835.jpg?v=1781512179"},{"product_id":"raspberry-pi-5mp-camera-module-board-with-cable-5mp-1080p","title":"Raspberry Pi 5MP Camera Module Board with Cable – 5MP, 1080p","description":"\u003ch1\u003eRaspberry Pi 5MP Camera Module Board with Cable – 5 Megapixel, 1080p Video\u003c\/h1\u003e\n\n\u003cp\u003eThe Raspberry Pi 5MP Camera Module Board is a compact, high-quality camera designed specifically for the Raspberry Pi range of single-board computers. Equipped with a 5-megapixel OmniVision OV5647 sensor, it captures sharp still images and smooth 1080p video at 30 frames per second. This module connects directly to the Raspberry Pi’s CSI port via the included ribbon cable, making it ideal for projects in photography, surveillance, computer vision, and more.\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\u003c\/td\u003e\n\u003ctd\u003eOmniVision OV5647 5MP CMOS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Still)\u003c\/td\u003e\n\u003ctd\u003e2592 × 1944 pixels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVideo Modes\u003c\/td\u003e\n\u003ctd\u003e1080p @ 30fps, 720p @ 60fps, 480p @ 90fps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField of View\u003c\/td\u003e\n\u003ctd\u003e54° (horizontal) \/ 41° (vertical) – standard lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003e15-pin MIPI CSI ribbon cable (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e25mm × 23mm × 9mm\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\u003eA motion‑activated wildlife camera to capture photos of visiting animals\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/wifi-security-camera-with-pico-w-home-security-kit-v4\"\u003eA DIY home security camera with live streaming and recording\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eA time‑lapse rig to document plant growth or construction progress\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-pi-5-opencv-face-recognition-door\"\u003eA computer vision setup for object detection or face recognition with OpenCV\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis camera module is compatible with all Raspberry Pi models that expose a CSI‑2 connector, including Raspberry Pi 5, 4, 3B+, 3B, 2B, Zero 2 W, and Zero. It works with the official Raspberry Pi OS and third‑party Linux distributions after enabling the camera interface. For Raspberry Pi Zero and Zero W, a separate narrower ribbon cable may be required (adapter not included).\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the ribbon cable with the blue side facing the Ethernet port on standard Pi boards, ensuring the metal contacts face away from the latch. Gently lift the CSI connector’s plastic tab, insert the cable fully, and press the tab down. Avoid flexing the cable sharply; a 50mm bend radius is recommended to prevent signal degradation.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eNo, this camera uses the MIPI CSI interface, which Arduino boards do not have. It is designed exclusively for Raspberry Pi and other boards with a compatible CSI port.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I adjust focus?\u003c\/summary\u003e\u003cp\u003eThe lens is fixed‑focus out of the box. However, you can gently rotate the lens barrel after removing any adhesive to adjust focus manually.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum cable length?\u003c\/summary\u003e\u003cp\u003eThe included cable is 15 cm. Longer cables up to 1 meter are available for separate purchase, but signal quality may degrade beyond 50 cm without proper shielding.\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":53444951802221,"sku":"CDN-0177","price":310.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_35508ac8-33b8-4506-a7a0-367dbfee11ee.jpg?v=1781512262"},{"product_id":"liquid-ph-0-14-sensor-module-with-bnc-probe-for-arduino","title":"Liquid pH 0-14 Sensor Module with BNC Probe for Arduino","description":"\u003ch1\u003eLiquid pH 0-14 Value Detection Sensor Module with pH Electrode Probe (BNC)\u003c\/h1\u003e\n\n\u003cp\u003eThe liquid pH sensor module measures pH levels from 0 to 14 using a combination electrode probe with BNC connector. It outputs an analog voltage proportional to pH, suitable for use with Arduino, ESP32, and other microcontrollers. Ideal for monitoring water quality in aquaponics, hydroponics, pools, and educational science projects.\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\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0 to 14 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eAnalog voltage (0-5V, inversely proportional)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1 pH at 25°C (after calibration)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProbe Connector\u003c\/td\u003e\n\u003ctd\u003eBNC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModule Dimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 42mm × 32mm\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\u003eAquaponics pH monitoring system\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-automatic-plant-watering-system\"\u003eAutomatic plant watering based on soil pH\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-drinking-water-quality-tester-kit-with-esp32-plus-lora\"\u003eHome water quality tester with display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eDIY pH meter for science fair projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis pH sensor module is compatible with any microcontroller that has an analog input, such as Arduino Uno, Nano, Mega, ESP8266, ESP32, and Raspberry Pi (with external ADC). It operates at 5V and provides a linear output suitable for direct analog-to-digital conversion. For best results, pair with an Arduino and use the provided sample code or popular libraries like \"DFRobot_PH\".\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the module's VCC pin to 5V, GND to ground, and the analog output (often labeled Po or A) to an analog input pin (e.g., A0). To reduce noise, place a 0.1µF capacitor between VCC and GND close to the module. The BNC probe must remain dry on the connector end; only the glass bulb should be submerged.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it works with any Arduino board. Use an analog pin, and you can find open-source code for reading pH values.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I calibrate this sensor?\u003c\/summary\u003e\u003cp\u003eYou'll need standard buffer solutions of pH 4.0 and 9.18. Measure the analog readings for each solution, then use the values in your code to calculate pH accurately. Calibration should be done before first use and periodically.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this for continuous monitoring?\u003c\/summary\u003e\u003cp\u003eYes, but for long-term immersion, ensure the probe is designed for continuous use. Avoid leaving it in highly acidic or alkaline solutions for extended periods to extend electrode life.\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":53444952621421,"sku":"CDN-0200","price":1830.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_ec4a72d7-504c-478a-9085-d8d09287f64a.jpg?v=1781512286"},{"product_id":"elecrow-crowtail-ph-sensor-module-20-analog-ph-meter-for-arduino","title":"Elecrow Crowtail pH Sensor Module 2.0 | Analog pH Meter for Arduino","description":"\u003ch1\u003eElecrow Crowtail pH Sensor Module 2.0 | Analog 0-14 pH Meter\u003c\/h1\u003e\n\n\u003cp\u003eThe Elecrow Crowtail pH Sensor Module 2.0 is a precise analog sensor designed to measure the pH level of liquids in your Arduino, Raspberry Pi, or microcontroller projects. It works with any standard pH probe (BNC connector) and outputs a voltage proportional to the pH, allowing easy integration into water quality monitors, hydroponics systems, and laboratory experiments. The module features a Crowtail 4-pin interface for plug-and-play connection, eliminating the need for soldering.\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\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0 - 14 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1 pH (at 25°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eAnalog (0-5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eBNC for probe, Crowtail 4-pin interface\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModule Dimensions\u003c\/td\u003e\n\u003ctd\u003e42mm x 32mm x 20mm\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\u003eDIY pH meter for aquarium or hydroponic nutrient solution monitoring\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/arduino-water-quality-monitoring-kit-tds-ph-and-turbidity-sensor\"\u003eAutomated water quality monitoring system with data logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eScience fair project to test acidity of household liquids\u003c\/li\u003e\n  \u003cli\u003eSmart greenhouse controller with real-time soil pH measurement (using soil slurry)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis sensor works seamlessly with Arduino UNO, Mega, and Nano boards using an analog input pin. It also pairs with Raspberry Pi through an ADC (like the Crowtail ADC module) or an MCP3008 for analog-to-digital conversion. The Crowtail interface is mechanically and electrically compatible with Seeed Studio Grove connectors.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the module's VCC to 5V, GND to ground, and the analog output (SIG) to an analog pin on your microcontroller. The BNC connector attaches securely to the included pH probe; ensure the probe is stored in storage solution when not in use. For stable readings, allow a 60-second warmup after powering.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it outputs 0-5V analog signal directly readable by any Arduino board's analog input pins. No additional libraries are required; simply read the voltage and convert to pH using a linear formula or calibration.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I calibrate the pH sensor?\u003c\/summary\u003e\u003cp\u003eThe module requires a two-point calibration using standard buffer solutions (typically pH 4.0 and pH 7.0). Adjust the offset and slope by comparing raw ADC readings with known pH values, then apply the calibration in your code.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the module include the pH probe?\u003c\/summary\u003e\u003cp\u003eYes, the Elecrow Crowtail pH Sensor Module 2.0 kit includes a standard pH probe with a BNC connector, a protective storage cap, and the interface board. You'll need to purchase buffer solutions separately for calibration.\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":53444953538925,"sku":"CDN-0220","price":1620.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_ab7486bc-d9a1-4e0c-a4c0-ea4b78041634.jpg?v=1781512306"},{"product_id":"arduino-sensor-shield-v40-expansion-board-for-uno-easy-prototyping","title":"Arduino Sensor Shield V4.0 Expansion Board for Uno - Easy Prototyping","description":"\u003ch1\u003eArduino Sensor Shield V4.0 – Expand Your Uno with Easy Sensor Connections\u003c\/h1\u003e\n\n\u003cp\u003eThe Arduino Sensor Shield V4.0 is an expansion board designed to stack directly onto an Arduino Uno. It breaks out all I\/O pins into organized 3-pin headers, enabling quick and solderless connections for sensors, servos, and modules. Ideal for rapid prototyping, it simplifies wiring and reduces clutter in your projects.\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\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC (via Arduino Uno)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 (0-13) broken out to 3-pin headers\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e6 (A0-A5) broken out to 3-pin headers\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCommunication Interfaces\u003c\/td\u003e\n\u003ctd\u003eUART, I2C, SPI (via dedicated headers)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eServo Headers\u003c\/td\u003e\n\u003ctd\u003e2 dedicated 3-pin servo ports\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAdditional Features\u003c\/td\u003e\n\u003ctd\u003eBluetooth\/APC220 module interface, power LED, reset button\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e55mm x 53mm (approx.)\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\u003e\u003ca href=\"\/products\/kit-obstacle-avoiding-robot\"\u003eObstacle-avoiding robot with ultrasonic and IR sensors\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eWeather station measuring temperature, humidity, and pressure\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eHome automation system with relays and motion detectors\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-line-following-robot\"\u003eLine-following robot for beginner robotics competitions\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis shield is designed for the Arduino Uno R3 form factor. It can also work with Arduino Mega 2560 if aligned correctly, but check pin mapping for compatibility. All pins operate at 5V logic; use level shifters for 3.3V sensors if needed. Common pairings include HC-SR04 ultrasonic sensors, DHT11\/DHT22 temperature sensors, and servo motors.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eSimply align the male headers with your Arduino Uno and press firmly. All signal, power, and ground connections are pre-routed to the 3-pin headers; no additional wiring is needed for most sensors. If using high-current loads like multiple servos, power them through the shield’s separate power input header rather than the Arduino’s 5V pin.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this shield compatible with the Arduino Mega?\u003c\/summary\u003e\u003cp\u003eYes, it can physically stack on the Mega, but some pins (like I2C) are on different locations. You will need to adjust the wiring in your code accordingly.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this shield with a Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eNo, this shield is designed for 5V Arduino boards and does not match the Raspberry Pi’s GPIO header or 3.3V logic. You would need a separate adapter.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need to solder anything?\u003c\/summary\u003e\u003cp\u003eThe shield comes with pre-soldered headers for stacking onto the Arduino. The sensor pins are typically male headers, so you will connect sensors using jumper wires without soldering.\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":53444953932141,"sku":"CDN-0229","price":140.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_e49bbff6-dc20-4a75-b2cb-3517e3f03c9d.jpg?v=1781512325"},{"product_id":"hr202-humidity-detection-sensor-module-for-arduino-iot","title":"HR202 Humidity Detection Sensor Module for Arduino \u0026 IoT","description":"\u003ch1\u003eHR202 Humidity Detection Sensor Module for Arduino \u0026amp; IoT\u003c\/h1\u003e\n\n\u003cp\u003eThe HR202 is a resistive humidity sensor module that detects ambient moisture levels. It outputs an analog signal proportional to humidity, making it perfect for weather stations, greenhouse controls, and smart home automation. Its compact design integrates easily into microcontroller projects.\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\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e20% – 90% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±5% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;10 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog resistance signal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e32mm x 22mm\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\u003eIndoor digital hygrometer\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-greenhouse-climate-monitor-kit-with-arduino-uno-plus-sensors\"\u003eGreenhouse climate monitor\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSmart bathroom mirror with fog alert\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eRemote weather station node\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis sensor works with any microcontroller that has an analog-to-digital converter (ADC), such as Arduino Uno, ESP32, and ESP8266. It can also interface with Raspberry Pi using an external ADC module like MCP3008. Operating voltage of 3.3V–5V matches most development boards.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC and GND to the board's power, and the analog output to an ADC pin. No pull-up resistor is needed; the sensor acts as a variable resistor. Keep the sensor exposed to air for accurate readings and avoid physical contact with the sensing element.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, wire the analog output to any analog pin (A0–A5 on Uno) and read the voltage. Use a voltage divider if needed to scale the output.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I calibrate the HR202 for accurate readings?\u003c\/summary\u003e\u003cp\u003ePlace the sensor in a sealed container with saturated salt solutions of known humidity (e.g., NaCl for 75% RH) and map the output voltage to those reference points.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use it to measure soil moisture?\u003c\/summary\u003e\u003cp\u003eNo, the HR202 is designed for ambient atmospheric humidity. For soil moisture, use a dedicated soil moisture 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":53444954325357,"sku":"CDN-0247","price":65.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_4b29178b-95b0-4e6e-b442-294ecce0e76d.jpg?v=1781512343"},{"product_id":"laser-sensor-module-650nm-5v-red-dot-diode-for-arduino-diy","title":"Laser Sensor Module 650nm 5V Red Dot Diode for Arduino DIY","description":"\u003ch1\u003eLaser Sensor Module 650nm 5V – Red Dot Laser Diode for Electronics Projects\u003c\/h1\u003e\u003cp\u003eThis 650nm laser sensor module operates at 5V DC, emitting a bright red laser dot suitable for alignment, security tripwires, and DIY electronics. Ideal for makers and hobbyists using Arduino or similar microcontrollers. The compact module includes a built-in driver circuit for stable output.\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\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e650 nm (red)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Current\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;40 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Power\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;5 mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBeam Type\u003c\/td\u003e\n\u003ctd\u003eDot (focused)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e~20 x 10 mm\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\u003eLaser tripwire security system\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-tof-laser-distance-sensor-kit\"\u003eLaser-based distance sensor (with LDR\/photodiode)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eDIY laser light show or pattern generator\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-line-following-robot\"\u003eLine-following robot or alignment tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis module works with any 5V system, including Arduino Uno, Nano, ESP8266, and Raspberry Pi (with 5V pin). Simply connect VCC to 5V, GND to ground, and signal pin (if any) to a digital I\/O. No additional components required for basic operation.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect red wire to 5V, black to GND. For modules with a third wire (enable\/signal), connect to a digital pin and set HIGH to turn on the laser. Do not exceed 5V; a current-limiting resistor is built in. Avoid direct eye exposure.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it works directly with any Arduino board. Connect VCC to 5V, GND to GND, and the signal wire (if present) to any digital pin to control the laser.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use this for a laser-based communication system?\u003c\/summary\u003e\u003cp\u003eYes, by modulating the power pin rapidly, you can transmit data wirelessly over short distances, but ensure you use a proper driver circuit for high-speed modulation.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes this module include a receiver?\u003c\/summary\u003e\u003cp\u003eNo, this module is only a transmitter (laser diode). To detect the laser, you will need a separate light sensor like an LDR or photodiode.\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":53444955373933,"sku":"CDN-0269","price":40.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_ec05fe76-dca9-421d-975b-e3b3bf0ffc08.jpg?v=1781512369"},{"product_id":"sensor-shield-v5-expansion-board-for-arduino-uno-compoden-0276","title":"Sensor Shield V5 Expansion Board for Arduino Uno | Compoden","description":"\u003ch1\u003eSensor Shield V5 Expansion Board for Arduino Uno\u003c\/h1\u003e\n\u003cp\u003eThe Sensor Shield V5 is a plug-and-play expansion board designed for Arduino Uno. It breaks out all I\/O pins to standard 3-pin GVS (Ground-Voltage-Signal) headers, making sensor connections quick and solderless. Ideal for rapid prototyping, it eliminates messy breadboard wiring and provides stable power distribution.\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\u003eCompatible Board\u003c\/td\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeader Type\u003c\/td\u003e\n\u003ctd\u003eGVS (3-pin) for all I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 (D0-D13)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e6 (A0-A5)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePower Output\u003c\/td\u003e\n\u003ctd\u003e5V and 3.3V rails\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\u003eMulti-sensor robot with ultrasonic, IR, and line sensors\u003c\/li\u003e\n  \u003cli\u003eHome automation hub controlling relays and reading temperature\/humidity\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eWeather station with DHT11, rain sensor, and BMP180\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eInteractive art installation using multiple LEDs and gesture sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis shield is purpose-built for the Arduino Uno R3 and clones with identical pinout. It stacks directly onto the Uno headers, extending them upward for further stacking. It works with any 5V-logic sensor or module that uses a standard 3-pin connector. For 3.3V sensors, use the onboard 3.3V rail and ensure logic level compatibility.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eSimply align the shield's male headers with the Uno's female headers and press firmly. All pins are clearly labelled: S for signal, V for 5V, G for ground. The shield draws power from the Uno's 5V rail, so no external supply is needed. For high-current accessories, power the Uno via an external 7-12V adapter.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Mega?\u003c\/summary\u003e\u003cp\u003eNo, the Sensor Shield V5 is designed for the Arduino Uno pinout, which differs from the Mega. Using it with a Mega may misalign pins and cause damage. For Mega, consider a dedicated Mega Sensor Shield.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this shield include any sensors?\u003c\/summary\u003e\u003cp\u003eNo, this is an expansion board only; sensors are sold separately. It provides the interface to easily connect and disconnect sensors without soldering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I stack another shield on top?\u003c\/summary\u003e\u003cp\u003eYes, the Sensor Shield V5 passes through all Arduino pins, so you can stack additional shields that follow the standard header layout. Ensure no pin conflicts with connected sensors.\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":53444956717421,"sku":"CDN-0276","price":100.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_5e5f3162-3a7c-432b-b641-74406e37be9d.jpg?v=1781512387"},{"product_id":"ky-031-knock-tap-sensor-module-vibration-switch-for-arduino","title":"KY-031 Knock Tap Sensor Module – Vibration Switch for Arduino","description":"\u003ch1\u003eKY-031 Knock Tap Sensor Module – Digital Vibration Detector\u003c\/h1\u003e\n\u003cp\u003eThe KY-031 Knock Tap Sensor Module uses a spring-based vibration switch to detect knocks, taps, and shocks. It outputs a clean digital signal that interfaces directly with microcontrollers, making it ideal for interactive projects, security systems, and educational experiments. The module includes an onboard potentiometer to fine-tune sensitivity and two indicator LEDs for power and signal status.\u003c\/p\u003e\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\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V to 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eDigital (Active Low)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensitivity Adjustment\u003c\/td\u003e\n\u003ctd\u003eVia onboard potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIndicator LEDs\u003c\/td\u003e\n\u003ctd\u003ePower (red) and Signal (green)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePCB Dimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 30mm x 15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSignal Interface\u003c\/td\u003e\n\u003ctd\u003e3-pin header (VCC, GND, OUT)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-knock-pattern-door-lock\"\u003eKnock-activated door lock or security system\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eTap-sensitive rhythm game controller\u003c\/li\u003e\n  \u003cli\u003eVibration alarm for drawers or safes\u003c\/li\u003e\n  \u003cli\u003eInteractive musical instrument trigger\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works with any microcontroller that supports digital input, including Arduino Uno, Arduino Nano, ESP32, ESP8266, and Raspberry Pi (with appropriate level shifting for 3.3V logic). It operates at both 3.3V and 5V logic levels, ensuring broad compatibility without additional circuitry.\u003c\/p\u003e\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V (or 3.3V), GND to ground, and OUT to any digital pin. The output is active low: it goes LOW when a knock is detected and returns HIGH when idle. Enable the internal pull-up resistor on the input pin for stable readings, especially in noisy environments.\u003c\/p\u003e\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the KY-031 module operates at 5V logic and connects directly to any digital pin on the Arduino Uno. No level shifting is needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I adjust the sensitivity?\u003c\/summary\u003e\u003cp\u003eTurn the small blue potentiometer on the module clockwise to increase sensitivity (detect lighter taps) or counterclockwise to decrease it (require harder knocks).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the output signal when a knock is detected?\u003c\/summary\u003e\u003cp\u003eThe OUT pin goes LOW (0V) during a knock event. It stays LOW for a short duration determined by the sensor’s internal timing, then returns HIGH (VCC) automatically.\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":53444958716269,"sku":"CDN-0333","price":35.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_5cf53965-e872-471d-82d5-2cecbbcb43b3.jpg?v=1781512460"},{"product_id":"ky020-tilt-switch-sensor-module-for-arduino-raspberry-pi","title":"Ky020 Tilt Switch Sensor Module for Arduino, Raspberry Pi","description":"\u003ch1\u003eKy020 Tilt Switch Sensor Module — Digital Tilt Detection for Microcontrollers\u003c\/h1\u003e\n\n\u003cp\u003eThe Ky020 Tilt Switch Sensor Module is a digital orientation sensor that detects tilt or inclination using an internal conductive ball switch. It provides a simple high\/low output when tilted beyond a threshold, making it ideal for motion-triggered projects. Compact and easy to use, this module requires no analog conversion and works seamlessly with popular development 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\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eDigital (High\/Low)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTilt Angle Detection\u003c\/td\u003e\n\u003ctd\u003e≥15° from horizontal (omni-directional)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003e3-pin (VCC, GND, DO)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 25mm × 15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2g\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\u003e\u003ca href=\"\/products\/kit-window-security-alarm-kit-with-arduino-uno-plus-led\"\u003eTilt-activated door or window alarm for security systems\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eOrientation-based robot control (flip to stop or change direction)\u003c\/li\u003e\n  \u003cli\u003eInteractive game controller using motion gestures\u003c\/li\u003e\n  \u003cli\u003eSimple digital inclinometer for slope measurement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe Ky020 module works with any microcontroller that reads a digital input, including Arduino Uno, Nano, Mega; Raspberry Pi; ESP8266\/ESP32; and STM32. It operates at 3.3V and 5V logic, making it safe for all common boards without level shifting. Pair it with relay modules or buzzers for immediate physical feedback.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V or 5V, GND to ground, and DO to a digital I\/O pin. The onboard pull-up resistor keeps the output high when the sensor is upright; it goes low when tilted. No additional components are required. For Raspberry Pi, use a GPIO pin configured as input.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, the Ky020 works directly with Arduino boards. Connect VCC to 5V, GND to GND, and DO to any digital pin to read the tilt state in your code.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the tilt angle sensitivity?\u003c\/summary\u003e\u003cp\u003eThe switch activates when tilted more than approximately 15 degrees from horizontal in any direction. It is omnidirectional and does not distinguish tilt direction.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it be used as a vibration sensor?\u003c\/summary\u003e\u003cp\u003eIt can detect sudden vibrations that cause tilting, but it is not optimized for small, rapid vibrations. For dedicated vibration sensing, consider a piezo or spring-type vibration module.\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":53444959175021,"sku":"CDN-0335","price":40.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_59bb584c-7fb3-42ec-8201-8eb62b1ef1f0.jpg?v=1781512472"},{"product_id":"801s-vibration-shock-sensor-module-digital-output-for-microcontrollers","title":"801S Vibration Shock Sensor Module – Digital Output for Microcontrollers","description":"\u003ch1\u003e801S Vibration Shock Sensor Module – Digital Output with Adjustable Sensitivity\u003c\/h1\u003e\u003cp\u003eThe 801S Vibration Shock Sensor Module is a compact digital sensor that detects vibrations, shocks, and tilts. It uses an LM393 comparator and a spring-based vibration switch to provide a clean digital HIGH\/LOW signal when vibration exceeds the adjustable threshold. This module is ideal for alarm systems, impact detection, and interactive DIY projects with microcontrollers like Arduino.\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\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V to 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eDigital (HIGH when idle, LOW when vibration detected)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity Adjustment\u003c\/td\u003e\n\u003ctd\u003eOnboard potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComparator Chip\u003c\/td\u003e\n\u003ctd\u003eLM393\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicator LEDs\u003c\/td\u003e\n\u003ctd\u003ePower (red) and Signal (green)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eapprox. 3.2cm x 1.4cm\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\u003eTap-activated LED lighting\u003c\/li\u003e\n\u003cli\u003eEarthquake detector prototype\u003c\/li\u003e\n\u003cli\u003eAnti-theft alarm system\u003c\/li\u003e\n\u003cli\u003eVibration feedback game controller\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis sensor module works with any microcontroller supporting 3.3V or 5V logic, including Arduino Uno, Nano, Mega, ESP32, and Raspberry Pi Pico. It connects to a digital GPIO pin and requires no additional hardware for basic operation. The onboard potentiometer allows fine-tuning for different vibration levels.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to 3.3V or 5V, GND to ground, and DO to a digital input pin on your microcontroller. The module outputs a digital HIGH normally and pulls the signal line LOW when vibrations exceed the set threshold. No external pull-up resistors are required for stable operation.\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 3-5 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 801S module works directly with the Arduino Uno. Connect the DO pin to any digital input and use digitalRead() to detect vibrations.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow sensitive is this vibration sensor?\u003c\/summary\u003e\u003cp\u003eSensitivity is adjustable via the onboard potentiometer. Turn clockwise to increase sensitivity for faint vibrations or counterclockwise to require stronger shocks to trigger.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes this sensor detect continuous vibration or just shocks?\u003c\/summary\u003e\u003cp\u003eIt detects both shocks and continuous vibration. The spring-based switch closes upon movement, and the comparator holds the output LOW as long as vibration persists above the threshold.\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":53444959764845,"sku":"CDN-0353","price":260.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_e685212b-7303-4d6b-95f1-d15378592fa9.jpg?v=1781512493"},{"product_id":"lm393-motor-speed-sensor-module-for-arduino-rpm-measurement","title":"LM393 Motor Speed Sensor Module for Arduino RPM Measurement","description":"\u003ch1\u003eLM393 Motor Speed Measuring Sensor Module – Slot-Type Optocoupler with Comparator Output\u003c\/h1\u003e\n\n\u003cp\u003eThe LM393 Motor Speed Measuring Sensor Module combines a slot-type infrared optocoupler with an LM393 precision comparator to deliver clean digital pulses for rotational speed measurement. By detecting interruptions from an encoder wheel or slotted disk, it provides accurate RPM data to any microcontroller. This module is a reliable choice for robotics, motor feedback systems, and DIY tachometer projects.\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\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V to 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eComparator IC\u003c\/td\u003e\n\u003ctd\u003eLM393\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eDigital (TTL compatible, active low)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSlot Width\u003c\/td\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDetection Method\u003c\/td\u003e\n\u003ctd\u003eInfrared slot-type optocoupler\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e32 x 14 x 7 mm (approx.)\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\u003eMeasure RPM of DC motors for precise speed control in robotics\u003c\/li\u003e\n  \u003cli\u003eBuild a digital tachometer for a drill press or lathe\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/mini-conveyor-belt-speed-control-kit-with-arduino-and-stepper-motor\"\u003eImplement speed feedback for a conveyor belt system\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eCount revolutions for a custom odometer or usage tracker\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works with any 3.3V or 5V microcontroller, including Arduino Uno, Nano, Mega, ESP32, ESP8266, Raspberry Pi Pico, and STM32 boards. The digital output connects directly to a GPIO pin. Pair it with an encoder code wheel (not included) with slotted holes to generate pulses proportional to speed.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to your microcontroller's 3.3V or 5V pin, GND to ground, and OUT to any digital input pin. The signal goes low when the slot is blocked by an opaque section of the encoder disk. No external pull-up resistor is required, but adding a 10kΩ pull-up can improve noise immunity in harsh environments.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, connect VCC to 5V, GND to GND, and OUT to any digital pin. Use the pulseIn() function to measure pulse width or attach an interrupt to count pulses for RPM calculation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it work with 3.3V systems like ESP32?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The LM393 comparator operates reliably at 3.3V, and the output logic level matches the supply voltage, making it safe for 3.3V GPIOs.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it measure low RPM accurately?\u003c\/summary\u003e\u003cp\u003eYes, it can detect very slow rotations as long as the encoder disc passes through the slot. Measurement resolution depends on the number of slots in your encoder wheel.\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":53444959895917,"sku":"CDN-0360","price":40.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/download_5979e3c3-c853-4316-9727-27009669da44.jpg?v=1781527337"},{"product_id":"voltage-sensor-module-0-25v-analog-input-for-arduino","title":"Voltage Sensor Module 0-25V - Analog Input for Arduino","description":"\u003ch1\u003eVoltage Sensor Module (0-25V) – Analog Output for Arduino \u0026amp; Raspberry Pi\u003c\/h1\u003e\n\n\u003cp\u003eThe Voltage Sensor Module is designed to measure DC voltages from 0 to 25V using a resistive divider network. It outputs a scaled analog voltage (0-5V) proportional to the input, making it ideal for microcontroller-based monitoring systems. Perfect for battery level tracking, power supply monitoring, and DIY electronics projects.\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\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e0 - 25V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e0 - 5V DC (analog)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eVoltage Divider Ratio\u003c\/td\u003e\n\u003ctd\u003e5:1 (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum Input Current\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e25mm x 13mm (PCB)\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\u003eBuild a real-time battery voltage monitor with an Arduino Nano and OLED display\u003c\/li\u003e\n  \u003cli\u003eCreate a solar panel output logger using an ESP32 and cloud dashboard\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-variable-bench-power-supply\"\u003eDesign a variable bench power supply with voltage readout on a 16x2 LCD\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eIntegrate into an overvoltage protection circuit with relay cutoff at 24V\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis sensor works with any microcontroller that has an analog input, including Arduino Uno, Nano, Mega, ESP8266, ESP32, and Raspberry Pi (with external ADC). It accepts 0-25V input directly; no external components are needed for basic measurement. Common pairings include the INA219 for current sensing alongside voltage.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to ground, and S (signal) to an analog input pin like A0. No pull-up is needed; ensure the input voltage never exceeds 25V to avoid damage.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, connect the S pin to any analog input on Arduino boards (5V logic). The output voltage range is 0-5V, matching the ADC reference.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I measure AC voltage?\u003c\/summary\u003e\u003cp\u003eNo, this module is designed for DC voltage only. For AC measurements, consider a transformer or dedicated AC sensor module.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the accuracy?\u003c\/summary\u003e\u003cp\u003eThe module has an accuracy of ±0.2V typically, depending on ADC resolution and supply voltage stability. For precise readings, calibrate using a known reference.\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":53444960715117,"sku":"CDN-0390","price":25.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/download_831da984-3c31-4f52-8529-ef34b4c2a218.jpg?v=1781596637"},{"product_id":"proto-screw-shield-10-for-arduino-uno-screw-terminal-prototyping","title":"Proto Screw Shield 1.0 for Arduino Uno - Screw Terminal Prototyping","description":"\u003ch1\u003eProto Screw Shield 1.0 for Arduino Uno – Screw Terminal Prototyping\u003c\/h1\u003e\u003cp\u003eThe Proto Screw Shield 1.0 is a prototyping expansion board for Arduino Uno that replaces breadboards with secure screw terminals. It provides easy, solderless connections for wires, sensors, and actuators, making your projects more reliable and portable. With a built-in reset button, LED indicator, and dedicated prototyping area, it's perfect for both beginners and experienced makers.\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\u003eCompatible Board\u003c\/td\u003e\n\u003ctd\u003eArduino Uno R3 and compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eScrew terminals for all digital I\/O, analog, power pins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditional Features\u003c\/td\u003e\n\u003ctd\u003eReset button, LED on pin 13, power indicator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrototyping Area\u003c\/td\u003e\n\u003ctd\u003eStandard 0.1\" pitch through-hole matrix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e69 x 53 mm (standard Uno shield size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e~25g\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\u003ePermanent sensor station for temperature and humidity logging\u003c\/li\u003e\n\u003cli\u003eMotor control panel with easy wire changes for robotics\u003c\/li\u003e\n\u003cli\u003eHome automation relay board without messy wiring\u003c\/li\u003e\n\u003cli\u003eEducational trainer board for teaching electronics\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis shield is designed for Arduino Uno R3 and compatible boards like Genuino Uno, Funduino Uno, etc. It stacks directly onto the board headers, providing screw terminals for all pins. Works with 5V system voltage. Not directly compatible with Mega or Leonardo without adaptation.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eInsert wires into the screw terminals and tighten gently. Maximum terminal wire gauge: 18 AWG. For the prototyping area, solder components as needed, or use extended pin headers to avoid damaging the shield pads. The reset button is connected to the Arduino's reset line.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Nano?\u003c\/summary\u003e\u003cp\u003eNo, the Proto Screw Shield 1.0 is designed for Arduino Uno R3 footprint. For Arduino Nano, you would need a shield with a different pin layout.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use this to power external motors?\u003c\/summary\u003e\u003cp\u003eYes, you can connect motor driver modules via the screw terminals. Ensure you supply adequate power through appropriate pins and follow motor driver specifications.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDo I need to solder anything?\u003c\/summary\u003e\u003cp\u003eNo soldering is required for wire connections. However, the prototyping area may require soldering if you add through-hole components. The shield itself works plug-and-play.\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":53444961534317,"sku":"CDN-0407","price":240.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_e458a237-7bea-4ffa-86bf-72937ccdfb98.jpg?v=1781512542"},{"product_id":"uno-r3-wifi-atmega328pesp8266-4mb-ch340g-compatible","title":"UNO R3 WiFi ATmega328P+ESP8266 4MB, CH340G Compatible","description":"\u003ch1\u003eUNO R3 WiFi Board — ATmega328P and ESP8266 with 4MB Flash\u003c\/h1\u003e\u003cp\u003eThe UNO R3 WiFi integrates an ATmega328P microcontroller and an ESP8266 (ESP-12E) WiFi module on a single board in the classic Arduino Uno form factor. It provides 14 digital I\/O pins, 6 analog inputs, and a CH340G USB-to-serial converter for seamless programming. Perfect for IoT projects requiring both robust GPIO and reliable wireless connectivity, it supports easy integration with existing shields and sensors.\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\u003eMicrocontrollers\u003c\/td\u003e\n\u003ctd\u003eATmega328P + ESP8266 (ESP-12E)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V (ATmega328P), 3.3V (ESP8266)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 (6 PWM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e32KB (ATmega328P) + 4MB (ESP8266)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e16MHz (ATmega328P), up to 80MHz (ESP8266)\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\u003eWiFi-controlled robot with live camera streaming\u003c\/li\u003e\n\u003cli\u003eSmart home relay switch for lights and fans\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eIoT weather station uploading data to the cloud\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eWeb server for remote sensor monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis board is compatible with the Arduino IDE for programming both the ATmega328P and the ESP8266. It works seamlessly with standard Uno shields and 5V logic sensors. The ESP8266 module supports 802.11 b\/g\/n networks and can be configured using AT commands or custom firmware. Common pairings include ultrasonic sensors, DHT11\/22, and relay modules.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eThe ESP8266's TX\/RX lines are typically connected to the ATmega's RX\/TX pins (D0\/D1) via on-board switches or jumpers. To avoid conflicts when uploading code to the ATmega328P, set the switches to disconnect the ESP. For AT command communication, use SoftwareSerial on other pins (e.g., D2\/D3) and keep the USB connection stable under high current draw.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eHow do I program the ESP8266 on this board?\u003c\/summary\u003e\u003cp\u003eYou can program the ESP8266 directly via the Arduino IDE after installing the ESP8266 board package. Use the on-board USB port while ensuring the ATmega328P is not interfering (set switches to ESP mode if available).\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with standard Arduino Uno shields?\u003c\/summary\u003e\u003cp\u003eYes, the pinout matches the Uno R3, so shields for motor control, LCD, and sensors will fit and work as long as they respect the 5V\/3.3V logic differences.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use WiFi and GPIO simultaneously?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The ATmega328P handles GPIO and sensor tasks while the ESP8266 manages WiFi communication. They can exchange data via serial without blocking each other.\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":53444961567085,"sku":"CDN-0409","price":530.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_fbff3808-00c7-4426-a562-e95cd9f9dd72.jpg?v=1781512541"},{"product_id":"arduino-uno-wifi-rev2-board-abx00173-iot-development","title":"Arduino UNO WiFi Rev2 Board (ABX00173) | IoT Development","description":"\u003ch1\u003eArduino UNO WiFi Rev2 (ABX00173) — IoT-Ready Microcontroller Board\u003c\/h1\u003e\n\n\u003cp\u003eThe Arduino UNO WiFi Rev2 is a microcontroller board based on the ATmega4809, featuring an integrated ESP32-based WiFi and Bluetooth module (NINA-W102). It is ideal for IoT and connected projects, maintaining full compatibility with the Arduino Uno ecosystem. On-board wireless connectivity without sacrificing familiar Uno format.\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\u003eATmega4809 (16 MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWireless\u003c\/td\u003e\n\u003ctd\u003eWiFi 802.11 b\/g\/n, Bluetooth v4.2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 (6 PWM)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e48 KB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003ctd\u003e6,144 Bytes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V\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\u003eWiFi-controlled home automation hub\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-soil-sensor-data-logger\"\u003eBluetooth-enabled sensor data logger\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eSmart IoT weather station\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eRemote motor control via BLE\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with all Arduino Uno shields and most 5V sensors and actuators. Compatible with the Arduino IDE and Cloud Editor. Pairs well with standard 5V power supplies and USB cables.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eThe board operates at 5V logic level; do not exceed 5V on I\/O pins. The onboard WiFi module communicates over UART. For initial setup, connect via USB Type-B cable.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno shields?\u003c\/summary\u003e\u003cp\u003eYes, the board maintains the same pinout and form factor as the classic Uno, ensuring shield compatibility.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I program it wirelessly?\u003c\/summary\u003e\u003cp\u003eYes, using the Arduino IoT Cloud or via OTA updates through the Arduino IDE.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference from the Uno R3?\u003c\/summary\u003e\u003cp\u003eThe UNO WiFi Rev2 adds an ATmega4809 and integrated WiFi\/BLE, unlike the R3 which requires external modules.\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":53444961599853,"sku":"CDN-0412","price":6550.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_43dd04e7-cf58-4047-b8af-770bc6049524.jpg?v=1781512543"},{"product_id":"elecrow-can-bus-shield-v15-for-arduino-uno-mcp2515-mcp2551","title":"Elecrow CAN-Bus Shield V1.5 for Arduino Uno – MCP2515 \u0026 MCP2551","description":"\u003ch1\u003eElecrow CAN-Bus Shield V1.5 for Arduino Uno – MCP2515 \u0026amp; MCP2551\u003c\/h1\u003e\n\n\u003cp\u003eThe Elecrow CAN-Bus Shield V1.5 equips your Arduino Uno with full CAN bus communication capabilities. Built around the MCP2515 controller and MCP2551 transceiver, it supports CAN V2.0B at speeds up to 1 Mb\/s. An onboard microSD card slot allows data logging, while the screw terminal provides secure CAN bus connections.\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\u003eCAN Controller\u003c\/td\u003e\n\u003ctd\u003eMCP2515 (SPI interface)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCAN Transceiver\u003c\/td\u003e\n\u003ctd\u003eMCP2551\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProtocol Support\u003c\/td\u003e\n\u003ctd\u003eCAN V2.0B, 1 Mb\/s max\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicroSD Slot\u003c\/td\u003e\n\u003ctd\u003eYes (SPI shared with CAN)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e2-pin screw terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard Arduino shield size (68.6 x 53.4 mm)\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\u003eOBD-II automotive diagnostic tool to read ECU data\u003c\/li\u003e\n  \u003cli\u003eIndustrial sensor network over CAN bus\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-can-bus-vehicle-data-logger\"\u003eVehicle data logger with timestamps on microSD\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSmart home CAN node for lighting or HVAC control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eDesigned for direct stacking on Arduino Uno, using SPI pins D10–D13 and the ICSP header. It can also work with Arduino Mega by adjusting the CS pin in software, though physical stacking requires jumpers. Works with 5V logic boards only; not directly compatible with 3.3V systems.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eSimply stack the shield on your Arduino Uno and connect CAN_H and CAN_L to the screw terminal. If your CAN network requires termination, add a 120Ω resistor across the bus lines. The microSD slot uses SPI chip select D4 by default; ensure no conflicts in your sketch.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Mega?\u003c\/summary\u003e\u003cp\u003eThe shield is designed for Uno pin headers but can communicate with a Mega via jumper wires. Connect SPI pins (MISO, MOSI, SCK) to the Mega's dedicated SPI header, and assign digital 10 as the chip select in your code.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it include a microSD card?\u003c\/summary\u003e\u003cp\u003eNo, the microSD card is not included. You'll need to supply your own FAT16\/FAT32 formatted card, up to 32 GB in capacity.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat libraries are needed for programming?\u003c\/summary\u003e\u003cp\u003eUse the popular Arduino CAN-Bus Shield library by Seeed Studio or the MCP2515 library by coryjfowler, both available on GitHub. They provide simple APIs for sending and receiving CAN messages.\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":53444961698157,"sku":"CDN-0416","price":900.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_c5f84944-4fd3-40df-a317-3ef925eef6e0.jpg?v=1781512547"},{"product_id":"official-arduino-micro-a000053-atmega32u4-board-with-header","title":"Official Arduino Micro A000053 ATmega32U4 Board with Header","description":"\u003ch1\u003eOfficial Arduino Micro A000053 Development Board (ATmega32U4)\u003c\/h1\u003e\n\n\u003cp\u003eThe Arduino Micro is a compact microcontroller board based on the ATmega32U4, offering built-in USB communication in a small form factor. It provides 20 digital input\/output pins, 12 analog inputs, and native USB HID support, making it ideal for projects that require keyboard or mouse emulation. This official version includes pre-soldered headers for immediate prototyping.\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\u003eATmega32U4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e20 (7 PWM)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e12 (10-bit ADC)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e32 KB (4 KB bootloader)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e16 MHz\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\u003eA custom USB MIDI controller for music production software\u003c\/li\u003e\n  \u003cli\u003eA mini keyboard or mouse emulator for accessibility projects\u003c\/li\u003e\n  \u003cli\u003eA compact game controller with buttons and joystick inputs\u003c\/li\u003e\n  \u003cli\u003eA wearable sensor hub that sends data over USB to a PC\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis board is fully compatible with the Arduino IDE and works seamlessly on Windows, macOS, and Linux. It uses the ATmega32U4's native USB interface, so no external programmer is needed. For external circuits, pair it with 5V sensors and modules typical in Arduino ecosystems.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eHeader pins are pre-soldered, but exercise care when handling the compact board to avoid shorts. Power can be supplied via the micro USB port or the Vin pin (7–12V recommended). Always ensure I\/O pin voltages do not exceed 5V to prevent damage.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno shields?\u003c\/summary\u003e\u003cp\u003eThe Micro's pinout differs from the Uno, so standard shields are not directly compatible without an adapter or custom wiring.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this as a USB keyboard or mouse?\u003c\/summary\u003e\u003cp\u003eYes, the ATmega32U4 supports native USB HID, so you can easily program it to emulate keyboard strokes or mouse movements.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it include a built-in programmer?\u003c\/summary\u003e\u003cp\u003eThe Micro does not require an external programmer; it appears as a USB device and can be programmed directly from the Arduino IDE via its bootloader.\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":53444961730925,"sku":"CDN-0418","price":2150.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_80dfdf61-1b43-4588-acf6-8e1785a3ae6c.jpg?v=1781512547"},{"product_id":"official-arduino-uno-q-2gb-single-board-computer-compodenin","title":"Official Arduino UNO Q 2GB Single Board Computer | compoden.in","description":"\u003ch1\u003eOfficial Arduino UNO Q 2GB Single Board Computer (ABX00162)\u003c\/h1\u003e\n\n\u003cp\u003eThe Official Arduino UNO Q is a versatile single-board computer built around the ATmega328P microcontroller, integrating 2GB of onboard storage via an embedded SD card slot. It retains the classic Arduino UNO form factor, making it fully compatible with existing shields and the Arduino IDE. Ideal for data-intensive projects, prototyping, and IoT applications where additional memory is critical.\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\u003eATmega328P\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e16 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 (6 PWM)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOnboard Storage\u003c\/td\u003e\n\u003ctd\u003e2GB (integrated SD 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\u003e\u003ca href=\"\/products\/kit-soil-sensor-data-logger\"\u003eA data logger that stores sensor readings for weeks without external storage\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eAn offline web server hosting static pages or dashboards for IoT monitoring\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eA portable weather station with 2GB of archival capacity for temperature, humidity, and pressure trends\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eAn educational platform to teach embedded programming with ample storage for multiple sketches and libraries\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis board is compatible with all standard Arduino UNO shields and the Arduino IDE. It can interface with popular modules like the ESP8266 Wi-Fi module, HC-05 Bluetooth, and various sensor arrays. The 5V logic level ensures seamless integration with most Arduino-compatible peripherals.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the board via USB for programming and power, or supply 7-12V through the barrel jack. When using the onboard storage, the SD card communicates over the SPI bus (pins 11, 12, 13), so avoid conflicts with other SPI devices. Do not exceed 20mA per I\/O pin.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with all Arduino UNO shields?\u003c\/summary\u003e\u003cp\u003eYes, it maintains the exact physical layout and pinout of the standard Arduino UNO R3, so any shield designed for the UNO will fit and work electrically.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I access the 2GB onboard storage?\u003c\/summary\u003e\u003cp\u003eUse the Arduino SD library in your sketch; the storage appears as a standard SD card connected to the SPI pins (CS on pin 4 by default).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat comes in the box?\u003c\/summary\u003e\u003cp\u003eYou receive the Arduino UNO Q board in anti-static packaging. USB cable and accessories are not included, but any standard micro-USB cable will work for programming and power.\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":53444961763693,"sku":"CDN-0417","price":4880.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_b3ddcce5-6b95-4fc8-b48b-f37e3684b0ef.jpg?v=1781512549"},{"product_id":"arduino-nano-r4-abx00142-development-board-atmega328p-5v","title":"Arduino Nano R4 ABX00142 Development Board – ATmega328P, 5V","description":"\u003ch1\u003eArduino Nano R4 ABX00142 Development Board – ATmega328P, 5V, Breadboard-Friendly\u003c\/h1\u003e\u003cp\u003eThe Arduino Nano R4 ABX00142 is a compact, breadboard-compatible microcontroller board built around the ATmega328P. It delivers all the functionality of the Arduino Uno in a tiny form factor, making it ideal for space-constrained prototypes and embedded projects. With 14 digital I\/O pins, 8 analog inputs, and a 16 MHz clock speed, it handles everything from simple sensor reading to complex automation tasks.\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\u003eMicrocontroller\u003c\/td\u003e\n\u003ctd\u003eATmega328P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage (recommended)\u003c\/td\u003e\n\u003ctd\u003e7-12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e14 (6 PWM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e32 KB (2 KB bootloader)\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\u003eLED blinking projects and interactive light displays\u003c\/li\u003e\n\u003cli\u003eTemperature monitoring system with an LM35 sensor\u003c\/li\u003e\n\u003cli\u003eServo motor controller for basic robotics\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-hc-sr04-ultrasonic-distance-sensor-starter-kit\"\u003eUltrasonic distance measurement using an HC-SR04\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe Nano works seamlessly with the Arduino IDE on Windows, macOS, and Linux. It interfaces directly with 5V sensors, modules, and actuators through its pin headers. For larger projects, it can be paired with external power supplies or USB power banks using its Mini-B USB port.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eSolder headers onto the Nano and plug it into a breadboard for easy prototyping. Connect sensors directly to the corresponding I\/O pins; use pull-up resistors where required on digital inputs. The board can be powered via USB or through the VIN pin with a regulated 7-12V supply.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with the Arduino Uno?\u003c\/summary\u003e\u003cp\u003eThe Nano uses the same ATmega328P chip and pin functions as the Uno, so code written for Uno will run on the Nano without modification.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it include a USB cable?\u003c\/summary\u003e\u003cp\u003eNo, the board requires a Mini-B USB cable (not included). Use a standard Mini-B cable to connect to your computer.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I power it via the Vin pin?\u003c\/summary\u003e\u003cp\u003eYes, apply 7-12V DC to the Vin pin; the onboard regulator will provide the required 5V to the board.\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":53444961861997,"sku":"CDN-0419","price":1560.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_c87089a0-6cca-452b-adf0-fe98e082ba02.jpg?v=1781512552"},{"product_id":"cable-for-arduino-unomega-usb-a-to-b-1-meter-compoden","title":"Cable for Arduino UNO\/MEGA (USB A to B) - 1 Meter | Compoden","description":"\u003ch1\u003eCable for Arduino UNO\/MEGA (USB A to B) - 1 Meter\u003c\/h1\u003e\n\u003cp\u003eThis USB A to B cable is specifically designed for connecting Arduino UNO and MEGA boards to a computer or USB hub. It provides a reliable link for uploading code and delivering stable 5V power, making it an essential accessory for any Arduino developer. With a length of 1 meter, it offers flexibility for both desktop and embedded projects without unnecessary clutter.\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\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eUSB Type A Male to USB Type B Male\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e1 Meter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eData Transfer Speed\u003c\/td\u003e\n\u003ctd\u003eUp to 480 Mbps (USB 2.0)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eArduino UNO, MEGA, and other USB Type B devices\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCable Construction\u003c\/td\u003e\n\u003ctd\u003eShielded, high-purity copper conductors\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\u003eUpload and test new sketches on Arduino UNO or MEGA\u003c\/li\u003e\n  \u003cli\u003ePower Arduino projects directly from a USB port or power bank\u003c\/li\u003e\n  \u003cli\u003eSet up real-time serial data monitoring for sensor logs\u003c\/li\u003e\n  \u003cli\u003eUse as a communication bridge between Arduino and Raspberry Pi\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis cable works with any board that features a USB Type B port, including Arduino UNO R3, Arduino MEGA 2560, Arduino Duemilanove, and older Diecimila models. It also functions with many printers, USB hubs, and audio interfaces that use the same connector. The standard 5V output meets the power requirements of Arduino microcontrollers.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eSimply connect the Type A plug to your computer or power source and the Type B plug to the Arduino. Ensure the connections are secure for stable data transmission. Avoid sharp bends near the connectors to maintain cable integrity over time.\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 3-5 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, this cable is specifically designed for Arduino UNO, which uses a USB Type B connector for programming and power.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this to power my Arduino?\u003c\/summary\u003e\u003cp\u003eWhen connected to a USB port, the cable provides 5V power, sufficient for running most Arduino projects without an external adapter.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this a data transfer cable or charge-only?\u003c\/summary\u003e\u003cp\u003eIt supports full USB 2.0 data transfer, allowing you to upload code and communicate with your Arduino while powering it.\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":53444961993069,"sku":"CDN-0426","price":75.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_819a0996-df77-440e-8aaf-b01714ca8559.jpg?v=1781512557"}],"url":"https:\/\/compoden.com\/collections\/arduino-kits.oembed?page=8","provider":"Compoden","version":"1.0","type":"link"}