Embedded Sensor – Passive Infrared Sensor (PIR)


  • PIR – Passive InfraRed Sensor
  • PIR consists of a Pyroelectric sensor which generates energy when exposed to heat.
  • The module covered with Fresnel Lense Cover.
  • BISS0001 micro Power PIR Motion Detector IC.




  • Passive Infrared Detector for Anti Theft security alarm system.
  • Passive Infrared Detector based Light On/OFF.
  • Automatic Light  ON/OFF.
  • Many other motion Detection Application.


Different PIR Modules

The HC-SR501 PIR Sensor Module

  • Working voltage : 5v to 20V DC
  • Range : 3 to 7 meters
  • Induction Lens size : 23mm.
  • PCB Size : 32mm x24mm.
  • Pins Details
    • Ground pin
    • VCC pin
    • Output pin (high logic level if an object is detected)
  • Two potentiometers.
    • One for adjusting the sensitivity of the sensor
    • Another for adjusting the time (0.3 Seconds up to 5 minutes) the output signal stays high when object is detected.
  • Jumper Settings (Selecting the trigger modes)
    • non-repeatable trigger – when the sensor output is high and the delay time is over, the output will automatically change from high to low level.
    • Repeatable trigger –  will keep the output high all the time until the detected object is present in sensor’s range

Arduino Example code :






Watch Video Tutorial (ArunEworld ‘s  Playlist Embedded Sensor -PIR)


Reference :

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