Building A Thermostat Using Arduino

This gives an excellent description of the technique. I’ve still yet to determine the switching current, which I’d like to before I build a potentially hazardous item. End goal of this project? Constructing a ‘Nest’-like learning thermostat. Mostly just to predict when I’ll come stomping in from the cold, and adjust the temperature appropriately an hour or two ahead of schedule.

Keeps it toasty.

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