PIR sensors are used to detect motion from pets/humanoids from about 20 feet away (possibly works on zombies, not guaranteed). This one has an adjustable delay before firing (approx 2-4 seconds), adjustable sensitivity and we include a 1 foot (30 cm) cable with a socket so you can easily reposition the sensor or mount it using the two drills on either side

Runs on 5V-16V power (if you need to run it off of 3V you can do that by bypassing the regulator, but that means doing a bit of soldering). Digital signal output is 3.3V high/low. Sensing range is about 7 meters (120 degree cone)

For a full tutorial with wiring diagrams, code examples and project ideas, PIR sensor tutorial page!

Technical Details

  • Length: 24.03mm/0.94in
  • Width: 32.34mm/1.27in
  • Screw hole distance: 28mm
  • Screw hole diameter: 2mm
  • Height (with lens): 24.66mm/0.97in
  • Weight: 5.87g/0.2oz


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PIR Motion Sensor [189]

  • Brand: Adafruit
  • Product Code: ADA-189
  • Reward Points: 12
  • Availability: 9
  • £13.04

  • Ex Tax: £10.87
  • Price in reward points: 200

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Electronic brick PIR motion sensor

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PIR (Passive Infrared Detection) is used to detect motion of human movement.

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