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QTR-8A Reflectance Sensor Array
 
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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 analog voltage output.
Compare all products in Pololu QTR Reflectance Sensors.
| Description | Specifications (0) | Pictures (12) | Resources (8) | FAQs (0) |
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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.
Recommended links
- Robot Zero: a fast line follower for beginners
- A guide to building a fast (> 2 m/s) line-following robot from scratch. By C.I.r.E., February 2011.
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