The passive infrared sensor (PIR) is a sensory unit that detects infrared (heat) energy and can be configured to trigger events based upon it being active or inactive. We will be using the Elegoo micro-controller to manipulate its output, as well as learning some hardware information.
Required Materials:
Passive Infrared Sensor (PIR) Male-Male Jumper Wires (x9) Elegoo Micro Controller
The PIR sensor is a cheap and easy to use unit that requires minimal effort on behalf of the user; with a few wires and taps of the keyboard you’ll be well on your way to implementing more complicated heat/ intrusion detection systems down the road.
Let’s first look at the PIR’s hardware and detail each of their functions:
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