Beeps if you leave open the door over 20 seconds 3V battery operation, simple circuitry This circuit, enclosed into a small box, i..
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Fridge door Alarm
Published on 2011-02-17 09:42:34
Beeps if you leave open the door over 20 seconds 3V battery operation, simple circuitry This circuit, enclosed into a small box, is placed in the fridge near the lamp (if any) or the opening. With the door closed the interior of the fridge is in the
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