Mobile Alarm

This simple yet effective circuit is ideal for motion or tampering detection. It can be used to monitor drawers, cupboards, suitcases, or any portable object that should remain stationary.

A thin wire can serve as the motion sensor — when the wire is moved, cut, or disturbed, the alarm is triggered. Thanks to its low power consumption, the circuit is suitable for long-term battery operation, making it perfect for portable security applications or educational demonstrations.