Door Knob Touch Alarm


Posted on Feb 7, 2014

This is door knob touch alarm for your home security purpose. The alarm will be activated when someone touch the metal door knod. This circuit wont work on full metal door. Download the schematic drawing This is door knob touch alarm for your home security purpose. The alarm will be activated when someone touch the metal door knod. This ci


Door Knob Touch Alarm
Click here to download the full size of the above Circuit.

rcuit won`t work on full metal door.




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