3 ms·
Why do you need a signal? You don't care about the temperature until you open your fridge to either consume to toss food, do you? Buy a digital thermometer for
by RogerL 7y ago
Why do you need a signal? You don't care about the temperature until you open your fridge to either consume to toss food, do you? Buy a digital thermometer for ten bucks, one that keeps a record of max/min, toss it in there, look at the max reading when you return from out of town.
If your power goes out you'll need aux power for whatever is reading the signal, otherwise it also won't work. You are making a huge project with all kinds of failure modes when this problem has been solved for ages. Kind of like the house with no mechanical light switches that you are responding to!
- roland35 7y agoI mentioned it up earlier but I did try out a simple battery digital min/max thermometer, but every time you opened the door the air temperature would rise above 40F (highest recommended temp to store dairy), which made it hard to use for the intended purpose! If the thermometer had more thermal mass attached to it (or simply had a low pass filter on the readout), it would have worked great. I also had an analog thermometer at one point, but obviously the problem here is if the power goes out, then comes back on and returns to the proper temperature. It should be a simple thing I agree!
- perl4ever 7y ago"If the thermometer had more thermal mass" Put it in some water?