DIY Laser Tripwire Alarm – Home Made Security System!!
DIY Laser Tripwire Alarm A tripwire is a passive triggering mechanism. Typically, a wire or cord is attached to some device for detecting or reacting to physical movement. In this case, we have a DIY laser tripwire that can set off a loud alarm if anyone tries to cross it! DIY Laser Tripwire Alarm – Home Made Security System!! No security
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