Photo Interrupter Sensor

WaveshareSKU: WAV-12225
Sale price £3.25
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A photo-interrupter sensor detects when something blocks the light between the infrared emitter and receiver elements. They're great for robot projects, item dispensing, object detection and more - use them however you like!

This sensor features an indicator LED to show you when the beam has detected an object - great for debugging.

The sensor also comes with a 20-slot encoder disk and a 3-pin XH2.54 cable.


  • Infrared detection, eliminating the interferences of external stray light
  • Schmitt trigger - stable waveform and signals
  • Signal output indicator (while breaking the beam the sensor outputs a low level and the indicator LED lights up)

Package Contents

  • 1x Photo Interrupter Sensor
  • 1x 20-slot encoder disk
  • 1x XH2.54 3-pin wire


    • Power: 3.3V ~ 5V
    • Dimension: 26.8mm × 15mm × 18.7mm
    • Mounting holes size: 3mm
    • Gap width: 6mm


    • Motor speed detection
    • Pulse counter

    How to Use

    In the case of working with a microcontroller:

    • VCC ↔ 3.3V ~ 5V
    • GND ↔ GND
    • DOUT ↔ MCU.IO (digital output)


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