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!

The goal of this module is to teach students about the properties of sound and computing distance with an ultrasonic sensor. The program can also be used to measure the relative distance. This module ...

A new alarm system is now being developed to provide early detection of possible fire occurrences in the forest. Built with a smoke sensor and a 3G network connection, prototype units of the ...