QTR-8RC Reflectance Sensor Array

QTR-8RC Reflectance Sensor Array
Pololu item #: 961 306 in stock

Price break Unit price (US$)
1 9.95
5 8.95
25 7.95
100 6.95


backorders allowed

This sensor module has 8 IR LED/phototransistor pairs mounted on a 0.375" pitch, making it a great detector for a line-following robot. Pairs of LEDs are arranged in series to halve current consumption, and a MOSFET allows the LEDs to be turned off for additional sensing or power-savings options. Each sensor provides a separate digital I/O-measurable output.

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Documentation and other information

QTR-8A and QTR-8RC Reflectance Sensor Array User’s Guide (Printable PDF: QTR-8x.pdf)

User’s guide for the QTR-8A reflectance sensor array.

Pololu QTR Reflectance Sensor Application Note (Printable PDF: QTR_application_note.pdf)

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 (Printable PDF: pololu_avr_library.pdf)

Information about installing and using the C/C++ libraries provided for use with Pololu products.

Arduino Library for the Pololu QTR Reflectance Sensors (Printable PDF: QTR_arduino_library.pdf)

This guide explains how to use the QTRSensors library to read Pololu QTR sensors and QTR sensor arrays with the Arduino.

Pololu AVR Library Command Reference (Printable PDF: avr_library_commands.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: building_line_courses.pdf)

Step-by-step instructions for building your own line-following courses.


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.