IR Obstacle Avoidance Sensor Module — Digital Infrared Proximity Sensor for Arduino, Robotics & Embedded Projects

This compact IR Obstacle Avoidance Sensor Module  is a low-cost, high-value proximity detector used widely in robotics, line-followers, and embedded systems. It combines an infrared emitter and IR photodiode/phototransistor with an on-board comparator and an adjustable potentiometer so you get a stable digital output (HIGH/LOW) when an object is detected within the adjustable detection range.

Designed for easy integration with Arduino, ESP8266/ESP32, Raspberry Pi and microcontrollers, the module runs from 3.3–5V and exposes three pins: VCC, GND, OUT. The sensitivity (range) is tuned with the blue trimmer potentiometer — making it ideal for tasks such as obstacle avoidance, edge detection, object counting, and simple presence sensing in robotics and automation projects.

Perfect for students, makers, and engineers building:

• Line-following and obstacle-avoiding robots

• Mini autonomous vehicles and rovers

• Conveyor/assembly presence detectors (low-cost)

• DIY robotics kits, STEM labs, and prototyping

🔧 Key Features & Benefits

• Interface: 3-pin (VCC, GND, Digital OUT) — easy to wire to microcontroller digital input.

• Operating Voltage: 3.3V – 5V (works with Arduino/ESP32/RPi GPIO)

• Adjustable detection range: ~1 cm to ~30 cm (range varies by target reflectivity and ambient light)

• Output Type: Digital comparator output (LOW/HIGH) — no ADC required

• On-board potentiometer for sensitivity calibration

• Compact PCB with mounting hole for easy placement in robot chassis

• Low power — suitable for battery-powered systems

• Quick prototyping — plug-and-play for educational kits and coursework