It beeps if the fridge door is left open for too long or hasn’t closed properly, to stop food from spoiling. There are lots of other uses as well. A refrigerator or freezer door that is left open or ...
Not properly closing a refrigerator door will no doubt invite huge electricity bills. This gadget is an alert device that beeps if you leave the refrigerator door open for more than 20 seconds. When ...
A previous Idea for Design, “Alarm Sounds When Refrigerator Door Remains Open Too Long,” draws power for its operation by modifying the refrigerator bulb wiring. This may not be acceptable, ...
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