Get close enough to this raven and you’ll set off the PIR sensor, which triggers lighting and sound effects, including some spooky glowing and blinking red eyes, general cawing, and of course ...

If you're also looking to illuminate pathways, entryways, or doorways, the right motion sensor lights can make all the difference. Today's best options use a combination of powerful brightness ...

Yet, they keep anyone from getting in without your knowledge. But, without an understanding of how they work you might miss some crucial maintenance steps every door sensor needs to stay functional.