Windows only: Motion Detection is a free application that turns your webcam into a motion-sensing security camera in just a few clicks. Assuming you've got a webcam hooked up to your computer, all you ...
[John] sent us this nice little project. He shows us how to create a motion activated alarm that plays the Mario Brothers theme and flashes some lights. He’s using an ATTiny13a for the brains, and a ...
Your garden variety motion detector uses IR, but these days, there are fancier technologies for achieving similar goals. If so desired, you can source yourself a microwave-based presence sensor ...
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