Freezer Alarm Relay : 5 Steps - Instructables

Freezer Alarm Relay: Our freezer is in a utility room which is isolated from our living space. Occasionally the freezer door doesn’t shut properly and the alarm goes off. The problem is that we can’t hear it if we are in our living space. How do we get a message that th…

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Step-by-Step Tutorial: Build a Freezer Alarm System

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Step-by-Step Tutorial: Build a Freezer Alarm System