QTR-8RC Reflectance Line Follower Sensor Array

🌟 Product Description

This 3-pin IR obstacle avoidance sensor uses an infrared LED and photodiode to detect nearby objects without physical contact. It outputs a digital signal that can be read directly by microcontrollers, making it a staple in robotics, CNC safety systems and automated electronics for simple, low-cost proximity detection.

🔑 Key Features

• Sensor Type – Active infrared emitter + receiver pair for short-range obstacle detection.

• Output – Digital (High/Low); adjustable detection distance with onboard potentiometer.

• Operating Voltage – 3.3 V – 5 V DC (compatible with Arduino, Raspberry Pi, ESP boards).

• Detection Range – Typically 2–30 cm depending on object color and ambient light.

• Pins – 3 pins (VCC, GND, OUT) with standard 2.54 mm header.

• Indicator LED – Shows power and detection status for quick debugging.

• Dimensions – ~4.8 × 1.4 cm PCB (varies by manufacturer).

Applications – Line-following and collision-avoidance robots, edge detection for CNC platforms, object counting and proximity triggers in embedded projects.