Pololu QTR-8RC Reflectance Sensor Array

Overview: The QTR-8RC reflectance sensor array is a versatile sensor module equipped with 8 IR LED/phototransistor pairs, arranged on a 0.375″ pitch. This module is ideal for applications like line-following robots. The pairs of LEDs are arranged in series to minimize current consumption, and an integrated MOSFET allows the LEDs to be switched off for power-saving or additional sensing capabilities. Each sensor outputs a digital I/O-compatible signal, making it easy to integrate with most microcontrollers.

Key Features:

• Multi-Sensor Array: 8 IR emitter and receiver pairs for precise line sensing or general-purpose reflectance detection.
• Efficient Power Management: LEDs can be turned off using a MOSFET, reducing power consumption when not in use.
• Digital I/O Compatibility: Outputs can be read as timed high pulses, eliminating the need for analog-to-digital conversion.
• Breakable Design: Module can be split into two smaller, independent sensor arrays for more flexible integration.

Specifications:

• Dimensions: 2.95″ x 0.5″ x 0.125″ (without header pins)
• Operating Voltage: 3.3-5.0 V
• Supply Current: 100 mA
• Output Format: 8 digital I/O-compatible signals
• Optimal Sensing Distance: 0.125″ (3 mm)
• Maximum Sensing Distance: 0.375″ (9.5 mm)
• Weight: 0.11 oz (3.09 g)

Applications:

• Line-following robots
• General-purpose proximity detection
• Reflectance measurement in robotics and automation projects

Additional Information:

• Compatible with the Pololu AVR library and Arduino library for easy integration.
• Module can be broken into two smaller arrays if space is limited or fewer sensors are needed.

This QTR-8RC module offers a reliable and efficient solution for line sensing and proximity detection, making it an excellent choice for robotics enthusiasts and developers.