{"product_id":"9-in-1-arduino-sensor-kit-ultrasonic-pir-dht11-mq2-ldr-compoden","title":"9 in 1 Arduino Sensor Kit | Ultrasonic, PIR, DHT11, MQ2, LDR - Compoden","description":"\u003ch1\u003e9 in 1 Arduino Sensor Kit - Ultrasonic, PIR, IR, DHT11, MQ2, LDR, Sound, Rain\u003c\/h1\u003e\n\u003cp\u003eThis 9-in-1 sensor kit bundles the most commonly used environmental and motion sensors for Arduino prototyping. It includes ultrasonic distance, passive infrared motion, infrared obstacle avoidance, temperature and humidity (DHT11), flammable gas (MQ2), light-dependent resistor, sound detection, and rain detection modules. Perfect for building home automation, security, and environmental monitoring projects on a single set of boards.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Types\u003c\/td\u003e\n\u003ctd\u003eHC-SR04 Ultrasonic, HC-SR501 PIR, IR Obstacle, DHT11 Temp\/Humidity, MQ2 Gas, LDR, Sound, Rain, IR Receiver\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC (module-dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eDigital (GPIO), Analog (ADC), 1-Wire (DHT11)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePCB Size (per module)\u003c\/td\u003e\n\u003ctd\u003eVaries: approx. 32mm x 14mm to 45mm x 20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackage Contents\u003c\/td\u003e\n\u003ctd\u003e9 sensor modules, no jumper wires\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHome security alarm with PIR motion and ultrasonic entry detection\u003c\/li\u003e\n  \u003cli\u003eIndoor weather station using DHT11 temperature\/humidity and LDR light level\u003c\/li\u003e\n  \u003cli\u003eGas leak alert system combining MQ2 sensor with a buzzer and relay\u003c\/li\u003e\n  \u003cli\u003eSmart irrigation controller using rain sensor and soil moisture substitute\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eAll modules operate at 5V logic and connect directly to Arduino Uno, Mega, Nano, or similar 5V boards. For 3.3V platforms like Raspberry Pi, use a level shifter on the signal lines to avoid damage. The DHT11 requires a 10k pull-up resistor on its data line, which is not included. Most modules draw under 20mA each, keeping total current well within USB power limits.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eEach sensor has VCC (5V), GND, and one or more signal pins. Connect VCC to the 5V rail on your board, GND to common ground, and signal to a digital or analog input. For the HC-SR04 ultrasonic sensor, trigger and echo pins go to separate digital I\/O. PIR output is 3.3V but safely read by 5V Arduino pins. IR obstacle and sound sensors output digital HIGH\/LOW; LDR and MQ2 give analog voltages.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 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, all sensors run at 5V and can be directly wired to the Uno’s GPIO pins without extra components, except the DHT11 which needs a 10k pull-up resistor on its data line.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo the sensors come with connecting wires?\u003c\/summary\u003e\u003cp\u003eNo, this kit includes only the 9 sensor modules. You will need separate male-to-female jumper wires to interface them with a breadboard or microcontroller.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this kit with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, but you must use a 5V to 3.3V logic level converter for any digital sensor signals. The Pi’s GPIO pins are not 5V-tolerant and can be damaged if connected directly.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445096636781,"sku":"CDN-0195","price":550.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_862c789e-16a0-4bd4-97f0-12dd2c512f73.jpg?v=1781513282","url":"https:\/\/compoden.com\/products\/9-in-1-arduino-sensor-kit-ultrasonic-pir-dht11-mq2-ldr-compoden","provider":"Compoden","version":"1.0","type":"link"}