PIR sensors are used to detect motion from pets/humanoids from about 20 feet away (possibly works on zombies, not guaranteed). Usually this sensor comes with a straight 3-pin header soldered on. This makes it annoying to use because its is not easy to plug into a breadboard and you can’t solder wires in. So we requested to leave it off and include a 3-pin right-angle header instead which you can solder in for breadboard use or skip and use wires. Runs on 3.3-6V. Digital signal output is high/low. In the shop now, $10 !
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