Arduino burglar alarm system DIY
This Arduino based burglar alarm system is not just an alarm system, it is a part of home automation project. Not only it will keep your home secure, but it can be used to monitor home temperature or even control window shutters.
It is based on Arduino Mega 2560 and contains GSM modem, temperature and humidity sensors, Ethernet module and PIR sensors. As if that was not enough, there are also RFID and NFC readers embedded so that system can be activated/deactivated by cards or key fobs. The system can also be accessed remotely via smartphone as it can be connected to your home network or even the Internet.
[ Source: IngGaro ]