Fridge's Door Alarm : 5 Steps - Instructables

Fridge's Door Alarm: I have an old fridge and sometimes the doors stay open wasting energy. So i created this simple Fridge's door alarm which will buzz when the door is open for x seconds.
Fridge's Door Alarm: I have an old fridge and sometimes the doors stay open wasting energy. So i created this simple Fridge's door alarm which will buzz when the door is open for x seconds.

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Fridge's Door Alarm : 5 Steps - Instructables