It is likely that many of us will at some time have experimented with motion detectors. Our Arduinos, Raspberry Pis, Beaglebones or whatever will have been hooked up to ultrasonic or PIR boards which ...

Let me introduce another simple microcontroller-based do-it-yourself circuit that detects motion and excites a light source in a flash. The “snooper” here is an ordinary passive infrared (PIR) motion ...

We’re still not sure exactly how [connornishijima]’s motion detector works, though many readers offered plausible explanations in the comments the last time we covered it. It works well enough, though ...

If you want to keep an eye on your home—whether you're worried about burglars or just worried about the dog getting into places it shouldn't—this super simple DIY alarm will send you an SMS message ...

Don't we all love it when clever people take stuff that's right off the shelf, or better still, in hand, and show us how to use it in innovative ways? Simple Help outines a cheap and easy way to set ...

Perhaps killing two birds with one stone isn't the best euphemism for the Scarecrow motion-activated sprinkler, since it will probably most appeal to animal lovers who abhor the whole electric ...