this post was submitted on 23 Sep 2026
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My fridge just beeps at me if the door has been open more than a minute or two.
It's not a 'smart' fridge, either. You don't need anything complex to accomplish that. I guess that the interior fridge light is wired in parallel with a simple timer circuit, and if that timer circuit is energized long enough for its pre-set timer to run out, it energizes the beeping circuit.
You could do a similar thing with your fridge. No need for network connectivity and computers to be involved. Just find the circuit that goes to the light bulb and wire in a simple electronic timer in parallel.