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 ...

Use this refrigerator alarm circuit to prevent leaving the fridge door open by sending out an alarm signal every time the door is left open for some time. The sensor of the alarm is an LDR. After a ...

For anyone who gets a late-night craving for anything out of the refrigerator and needs some help in the willpower department, [Claudio] may have the project for you. He has just finished work on a ...

One of the most power-hungry devices in our homes, besides the air conditioner or heater, is our refrigerator and freezer. It’s especially so if the door doesn’t close all the way or the magnetic seal ...

When it comes right down to it, gadgets are supposed to make your life better . Enhance them, in some way. Often times, though, they seem to bring as many problems as they fix. That’s why I appreciate ...

Not properly closing a refrigerator door will no doubt invite huge electricity bills. This gadget, based on a 4060B CMOS binary counter IC, is an alert device that beeps if you leave the refrigerator ...

Your old appliances can now learn new tricks. Looking to gain a foothold in the fast-expanding smart-home market -- and potentially save a bunch of old and unloved coffeemakers and refrigerators from ...