QTR-8RC Reflectance Sensor Array

Pololu item #: 961
Brand: Pololu supply outlook
Status: Active and Preferred 
RoHS 3 compliant

Price break Unit price (US$)
1 9.95
5 9.15

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.

 Description Specs (1) Pictures (13) Resources (12) FAQs (0) On the blog (8) 

QTR-8RC reflectance sensor array.

Schematic diagram of the QTR-8RC reflectance sensor array.

QTR-8A reflectance sensor array with included 25-pin 0.1" header strip and 100 Ohm through-hole resistor.

The QTR-8A reflectance sensor can separate into two smaller, functional arrays of length 2 and 6.

The bottom of the QTR-8A reflectance sensor array PCB, showing silkscreen labeling.

Solder the included resistor to the 2-sensor array piece as shown to make the separated piece functional.

QTR-8A and QTR-8RC reflectance sensor array dimensions.

QTR-8x reflectance sensor array with 8×2 connection pins labeled.

QTR-8x reflectance sensor array with 11×1 connection pins labeled.

QTR-8A reflectance sensor array on a 3/4" line with a quarter for size reference.

QTR-1RC output (yellow) when 1/8" above a white surface and microcontroller timing of that output (blue).

QTR-1RC output (yellow) when 1/8" above a black line and microcontroller timing of that output (blue).

QTR sensor size comparison. Top row: QTRX-HD-07, QTR-HD-07; middle row: QTR-3, QTR-1, QTR-L-1; bottom row: QTR-8.

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