PIR module usually requires an initial warm-up period for the sensing elements to come up to the operating mode. This usually takes not less than 30 seconds. So a 30 seconds delay is intentionally ...

TK has combined a PIR with an Arduino to create a smart safety light for the house or workshop. Follow along as this gets built out into a more extensive project.

Extra abilities with Arduino, Raspberry Pi, and more With a PIR sensor, a power supply and a voltmeter, you’re well on your way to some cool tech. Jeremy S. Cook ...