While PIR sensors can be used with Arduino and other microcontroller boards, those best-suited for hobby use are smart enough to perform simple tasks without any programming.

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 e-Health Sensor Platform was designed by Cooking Hacks to help researchers and developers measure biometric sensor data for experimentation, fun and test purposes.