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I have to buy a new thermostat for our house heat, or make a diy thermostat as a small project.

I’m having a hard time thinking of a more minimalist design than the Honeywell round thermostat. It doesn’t need a battery, or a processor, or anything other than a spring some fluid and a dial. The dial tells you both the current temp and your setting. I have to justify adding technology to improve it in some way but it just appears to add more problems.



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