Electronics » Sensors »
QTR-1A Reflectance Sensor
 
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The QTR-1A reflectance sensor carries a single infrared LED and phototransistor pair in an inexpensive, tiny 0.5" x 0.3" module that can be mounted almost anywhere and is great for edge detection and line following applications. The reflectance measurement is output as an analog voltage.
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Documentation and other information
Pololu QTR Reflectance Sensor Application Note
Information about using the Pololu QTR-xA and QTR-xRC reflectance sensors, including sample oscilloscope screen captures of sensor outputs.
Pololu AVR C/C++ Library User’s Guide
Information about installing and using the C/C++ libraries provided for use with Pololu products.
Arduino Library for the Pololu QTR Reflectance Sensors
A guide to using the Pololu QTRSensors library with Arduinos and Arduino-compatible devices like the Pololu Orangutan robot controllers.
Pololu AVR Library Command Reference
A reference to commands provided in the Pololu C/C++ and Arduino libraries for the AVR.
File downloads
- Datasheet for Fairchild’s QRE1113GR reflective object sensor (202k pdf)
- This is the sensor that we initially used in the Pololu QTR reflectance sensors, but we have since switched to a similar generic unit that has slightly longer range.
