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Tutorial: How to use the PIR Sensor with Arduino

DFRobot Aug 27 2012 367

This tutorial, we will show how to use the PIR sensor  with your Arduino board. The Passive InfraRed is a device that detects infrared radiation, like heat. That sensor can activate an alarm when it detects a change in the infrared image. So, when a person moves in front of it, he/she can be detected.  

Source  Garagelab