Infrared Encoder Speed Counter Sensor Module


This is a sensor you can use with Arduino to measure the speed of motor coupled with encoder disk by rate of interruption of optical light, act as a contactless tachometer.


Out of stock

Add to Wishlist
Add to Wishlist


MH Sensor Series

This is an easy to use sensor module you can use to sense the rotation speed of a rotary disk (used in geared DC motor), by looking at the rate of interruption of IR optical light between the photointerrupter sensor, in term of pulse frequency. You can equip this sensor under mobile robot that has rotary encoder disk to measure the speed of individual motor as a tachometer, so that you can improve the balance of speed between left and right motors. You can also use this sensor to sense thin sheet material such as papers, boards, etc.

Note : this sensor can works with both analog and digital mode. You can connect the analog output (AO) pin to Arduino to read the intensity of optical light, or digital output (DO) to sense the interruption rate. Adjust the potentiometer (a.k.a. trimmer) to set the digital output (DO) sensitivity.

Specific Features

  • Comes with photointerrupter that consists of a pair of infrared emitter and receiver facing each other
  • Interrupting the infrared optical light in between the photointerrupter results the change of output.
  • You may use simple digital reading to sense presence of sheet material, or pulse reading to read speed of encoder disk.
  • You can use analog reading to sense the opaqueness of sheet material.
  • Model code : FC-03


Common Features

  • Logical IC : LM393
  • Operating voltage : 3.3 – 5V
  • Output current : ≤15 mA
  • Adjustable sensitivity via potentiometer
  • Comes with LED indicators for POWER and OUTPUT
  • Fixed bolt holes for easy installation



VCCPower sourceConnect to 3.3V or 5V of system
GNDGroundConnect to GND of system
DODigital OutputConnect to any digital IO pin
AOAnalog OutputConnect to analog input pin (Optional)


Files & Documentation

Additional information

Weight5 g
Dimensions32 × 14 × 10 mm


There are no reviews yet.

Be the first to review “Infrared Encoder Speed Counter Sensor Module”

Your email address will not be published. Required fields are marked *