How Passive Infrared motion detectors work
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PIR motion detector - HOW IT WORKS (easy to understand)
https://www.youtube.com/watch?v=AZqNGl5vbjk
For 40 YEARS I've been working with PIRs. Ever wondered what they can actually see?Explained so that ANYONE can understand it, it's another QUALITY video fr...
an excellent demonstration of how the humble motion sensors work.