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A MAKE reader sent in this handy doorknob alarm project - "A excellent analysis of a DIY circuit that buzzes when someone touches your doorknob. A lot better than a sock and it could be extended to ring your doorbell or worked into a home automation system." - Link.
HOW TO - Make a doorknob touch alarm
Posted by Phillip Torrone |
May 12, 2006 07:30 PM
DIY Projects, Electronics |
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Ok, you lost me. Better than a sock.?.
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It's more clear in the actual post, but he's talking about the "busy signal" roommates have.
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