MH Infrared Obstacle Sensor Module


This is a sensor you can use with Arduino to sense the proximity of any object (as long as it is not transparent), suitable for many projects.

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SKU: MDU-SEN-MH-IRSENSE Category: Tags: , , , , ,


MH Sensor Series

This is an easy to use sensor module you can use to sense the presence of all type of object, including living things, as long as the object being sense is not completely transparent. This is the famous sensor that you can use in many school projects for counting, alarming, triggering and actuator activation purposes. You can use this sensor for sensing black and white lines, suitable for making optical pattern projects and line following robots. Also, you can use this sensor to sense frequency of object.

Note : this sensor only works in DIGITAL mode. You can connect the digital output (DO) to sense. Adjust the potentiometer (a.k.a. trimmer) to set the digital output (DO) sensitivity.

Specific Features

  • Comes with a pair of 5mm infrared LED (emitter) and photodiode (receiver) work as reflect optical sensor
  • Wavelength : 940 nm
  • Output type : Digital
  • Model code : FC-51


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



Label Meaning Connection
VCC Power source Connect to 3.3V or 5V of system
GND Ground Connect to GND of system
DO Digital Output Connect to any digital IO pin



Additional information

Weight 5 g
Dimensions 32 × 14 × 10 mm


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