Deba168's system uses two Arduinos, an RF transmitter, a motion sensor, and a few other parts to piece it all together. When the motion sensor detects movement, it buzzes the other Arduino.

arduino gsm security alarm. Working of the system is very simple and self-explanatory. When input power is applied to the system, the system goes into standby mode. However, when the terminals of ...

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 ...