QTR-8RC Reflectance Line Follower Sensor Array

The QTR-8RC is an 8-channel reflectance sensor array designed for line-following robots and surface detection applications. It uses infrared (IR) LEDs and phototransistors to detect the reflectivity of surfaces, making it ideal for robotics projects that require precise line tracking. The sensor array is easy to interface with microcontrollers and offers high-speed response for smooth and accurate movement. Its compact form factor allows seamless integration into small robotic platforms.

Features:

• 8 independent reflectance sensors

• Uses IR LEDs and phototransistors for surface detection

• High-speed response for accurate line tracking

• Easy to interface with microcontrollers (Arduino, ESP32, etc.)

• Compact design suitable for small robotic platforms

• Adjustable sensitivity using resistor networks

• Compatible with reflective and non-reflective surfaces

Specifications:

• Number of Sensors: 8

• Sensor Type: Reflective IR (LED + Phototransistor)

• Sensor Pitch: 0.315 inches (8 mm approx.)

• Output Type: RC time measurement (capacitor charge time)

• Supply Voltage: 3.3–5 V

• Current Consumption: 8 mA per IR LED (typical)

• Dimensions: 50 × 10 mm (approximate)

• Connector: 5-pin header (VCC, GND, 8 outputs)

Applications:

• Line-following robots

• Surface detection and edge detection

• Obstacle avoidance in mobile robots

• DIY robotics and educational projects

• Autonomous navigation for small vehicles