August 11, 2014 Add as a preferred source on Google Add as a preferred source on Google Deba168's system uses two Arduinos, an RF transmitter, a motion sensor, and a few other parts to piece it all ...

There’s a huge market for 433 MHz alarm system hardware out there, from PIR motion detectors to door and window sensors. If you want to put them to work, all you need is a receiver, a network-enabled ...

June 7, 2015 Add as a preferred source on Google Add as a preferred source on Google Alarm clocks are cheap and abundant, but they’re pretty boring. If you want to make your own, Instructables user ...

Here is a simple general-purpose security alarm circuit built on the Arduino platform. It brings up an obtrusive alert signal when an intrusion/theft attempt is observed by its front-end sensor. In ...

Instructables user [willnue] wanted to build a DIY Tweeting alarm system from the ground up, but reconsidered after taking a close look at the scope of such a project. He settled on using an off the ...

Over at DSS Circuits, Wayne Truchsess has posted a great article about a "Honeypot" he built inside an empty PS3 case. The device includes a GPS for tracking its position, an accelerometer for motion ...