Review on HC-SR501 PIR Motion Sensor Modules for Arduino - Geekstory Pack of 5pcs, Pyroelectric Infrared Body Sensor by William Mathis
A fun way to tell when people are approaching
I love this product. I put it in a project to recognize people. He climbs the stairs to my workshop and when another person comes by he warns me. Loud cars and woodworking equipment amaze me, but nothing more. The illustration shows an Arduino Nano communicating with this PIR sensor.
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