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QTR-L-1A Reflectance Sensor (2-Pack)
The QTR-L-1A reflectance sensor incorporates a right-angle infrared LED and a right-angle phototransistor in an inexpensive, tiny 0.35″ × 0.3″ module that can be mounted almost anywhere and is great for edge detection and line following. The reflectance measurement is output as an analog voltage. This sensor is sold in packs of two units.
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Documentation and other information
Pololu QTR Reflectance Sensor Application Note (Printable PDF)
Information about using the Pololu QTR reflectance sensors, including differences between A-type and RC-type sensors and sample oscilloscope screen captures of sensor outputs.
Pololu AVR C/C++ Library User’s Guide (Printable PDF)
Information about installing and using the C/C++ libraries provided for use with Pololu products.
Pololu AVR Library Command Reference (Printable PDF)
A reference to commands provided in the Pololu C/C++ and Arduino libraries for the AVR.
Building Line Following and Line Maze Courses (Printable PDF)
Step-by-step instructions for building your own line-following courses.
Drill guide for QTR-L-1A and QTR-L-1RC Reflectance Sensor (13k dxf)
This DXF drawing shows the locations of all of the board’s holes.
Dimension diagram of the QTR-L-1x Reflectance Sensor (119k pdf)
3D model of the QTR-L-1A Reflectance Sensor (2MB step)
Guide utilisateur du senseur QTR (suiveur de ligne) (1MB pdf)
Un guide utiliser et exploiter un senseur QTR (détecteur de ligne) (version 0.1). Note: This French translation of our QTR sensor documentation was made by our distributor MCHobby.
mbed library for QTR sensors
Matthew Phillipps ported our Arduino Library for the Pololu QTR Reflectance Sensors to the mbed platform. The Arduino library is designed to work with Pololu QTR reflectance sensors, so the mbed library should too, but Matthew points out he only tested it with the analog sensors. This library was not written and is not maintained by Pololu.
Arduino library for the Pololu QTR Reflectance Sensors
This library for Arduino makes it easy to interface with Pololu QTR Reflectance Sensors.