Fridge Door Detector Alarm

Has it ever happened to you to go to the fridge and discover that its door is slightly opened ... and probably most your food went to the trash ... Ghhhrr that jammed door that needs an extra push to make it close properly ....... This instructables will show you how to make an alarm system that will beep a buzzer if you leave the fridge door opened for a long time to remind to you to close the door. All ne ...

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