Here is an ultra simple Arduino Night Alarm project wired around a handful of inexpensive and easily available components. One advantage of using Arduino as a security system is the flexibility!

When the motion sensor detects movement, it buzzes the other Arduino. Combine that with a text messaging alarm system and you've got a pretty cheap and easy way to keep an eye on things at your house.

If you have an upcoming long distance move and you're concerned about thieves breaking into your moving truck you can rig up a motion alarm system that will send a text message as well as trigger ...

This shield includes connections to an alarm system, a GSM modem, temperature and humidity sensors, an Ethernet module, and IR movement sensors.

Residential-grade commercial alarm systems are good at a few things but terrible at others, like keeping pace with telephone technology. So what to do when a switch to VOIP renders your alarm ...

Complies with EN 14604, EN 50291, and Q mark. Related To: Ajax Systems Wireless fire detector with a built-in siren. The detector has a dust-proof smoke chamber, a dual-spectrum optical smoke ...