While PIR sensors can be used with Arduino and other microcontroller boards, those best-suited for hobby use are smart enough to perform simple tasks without any programming.

Make a motion-controlled wildlife camera with an old smartphone and find out what birds, bees, butterflies and badgers are visiting your garden ...

How do you wire a motion sensor to an existing outdoor light? Specific instructions for wiring up a motion sensor will vary by brand. Be sure to check the manufacturer’s instructions on specifics.