Infrared IR Obstacle Avoidance Sensor Board 3 Pin
The Infrared IR Obstacle Avoidance Sensor Board (3-Pin) is a compact and highly effective sensor module designed for detecting objects and avoiding obstacles in robotics and automation projects. Using infrared technology, this sensor emits IR light and measures the reflection from nearby surfaces, allowing it to determine the presence of an object without physical contact. It’s ideal for beginners, hobbyists, and students working on Arduino, Raspberry Pi, or other microcontroller-based systems.
This 3-pin version features a simple interface with VCC, GND, and OUT pins, making it easy to integrate into most electronic circuits. The onboard potentiometer allows you to adjust the sensitivity and detection range of the sensor, typically up to 30 cm depending on lighting conditions and the reflectivity of the object. With its fast response time and low power consumption, it is a reliable solution for real-time applications.
The sensor works by sending out infrared light through a transmitting LED. When an object is within the detection range, the light reflects back and is detected by the receiving photodiode. This change is processed internally, and the digital output pin changes its state accordingly—high when no object is detected, and low when an object is present.
Whether you’re building a line-following robot, an automatic lighting system, or a security device, this IR obstacle avoidance sensor provides dependable detection capabilities at a low cost.
Key Features
Uses infrared light to detect nearby objects
3-pin design: VCC, GND, and digital output
Adjustable detection distance via onboard potentiometer
Low power consumption and fast response time
Compatible with Arduino, Raspberry Pi, and other microcontrollers
Compact size ideal for robotics and embedded systems
Reliable in indoor environments with stable readings
Product Specifications Table
| Specification | Details |
|---|---|
| Operating Voltage | 3.3V to 5V |
| Interface | 3-pin (VCC, GND, OUT) |
| Detection Range | 2–30 cm (adjustable) – |
| Output Type | Digital (High/Low) |
| Adjustment | Sensitivity via potentiometer |
| IR Wavelength | ~940 nm |
| Dimensions | ~4.5 x 1.5 cm |
| Compatibility | Arduino, ESP32, Raspberry Pi |
Applications
Obstacle avoidance in mobile robots
Line-following robot sensors
Automatic doors and counters
DIY automation and electronics projects
Proximity detection in security systems
Smart home sensor modules
