How To Construct A Pressure Pad Alarm System

Hukimaster
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Published 20 Nov 2007
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I'll show you by an easy way, how to construct an alarm system, that's based on the principle of pressure p...
I'll show you by an easy way, how to construct an alarm system, that's based on the principle of pressure pads, which work by touch. It's very useful to catch unpleasant visitors red-handed ;)
Categories: How To, Science & Tech
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