Can you add a motion detector to an existing light? Yes, there are add-on motion sensors that you can attach to existing lights. The easiest way to install a new motion sensor to an existing ...

The motion sensor switch circuit can automatically turn on a water sprinkler but you can easily use it as a motion sensor light switch or motion activated alarm too.

Motion detectors aren't just for home security - you can also use them to regulate the temperature in your home, automate ...