Description
Description
The Pololu QTR-8RC Reflectance Sensor Array is an infrared sensing module designed for line detection, edge sensing, and short-range proximity measurement in robotics and automation systems. It integrates eight IR LED and phototransistor pairs that provide independent digital outputs compatible with standard microcontroller I/O. Operating from 3.35 V, the array offers reliable reflectance detection with optimal performance at around 3 mm distance. Its compact breakable PCB design allows flexible placement and easy integration into line-following robots and embedded control systems.
Features
- 8 infrared LED and phototransistor sensing channels
- Independent digital outputs for each sensor channel
- Compatible with standard microcontroller digital inputs
- Operating voltage range 3.35 V
- MOSFET control for switching LED emitters on or off
- Series LED configuration reduces power consumption
- Breakable PCB design for flexible sensor spacing
- Compact form factor suitable for robotics platforms
Specifications
- Operating Voltage: 3.35 V
- Total Current Consumption: ~100 mA
- Output Type: Digital I/O Compatible
- Number of Sensor Channels: 8
- LED Current: 2025 mA per LED pair
- Optimal Sensing Distance: 3 mm
- Maximum Recommended Distance: 6 mm
- Sensor Type: Infrared LED with Phototransistor
- Board Dimensions: 75 12.7 3.2 mm
- Weight: 3.09 g (without header pins)
- PCB Design: Breakable into smaller modules
- Power Control: MOSFET switch for LED enable
Links
- QTR-8A and QTR-8RC Reflectance Sensor Array Users Guide by pololu.com
- 3D model from grabcad.com
Tutorials
- Building Line Following and Line Maze Courses at pololu.com
Reviews
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