How to make a Tripwire Alarm System using a transistor (With 6 Pictures)

Tripwire Alarm System

Tripwire Alarm System with step by step instructions. Hi, my dear friends! Today I am going to show you how to make a simple Tripwire Alarm System for door using a transistor. It’s very easy to make so you can easily make this tripwire alarm system in your home. It can be used the alarm … Read moreHow to make a Tripwire Alarm System using a transistor (With 6 Pictures)