4 ms·
> The battery powers nothing, but the microcontroller senses it’s voltage and when it is too low, it changes the behaviour of the thermostat to randomise the te
by jefftk 2y ago
> The battery powers nothing, but the microcontroller senses it’s voltage and when it is too low, it changes the behaviour of the thermostat to randomise the temperature cut in/out points by about 10 degrees Fahrenheit
This is really neat, if true, but I have to say I'm skeptical. This is just too good a story!
- K0balt 2y agoPick one up and see for yourself. I think they still make them. It’s the basic round dial type thermostat from Honeywell. It uses an at328p MCU and it even has a programming header. The debug was open on the ones I played with, so I downloaded the code, but I never got around to (or had the tools to) disassemble it. I was going to just write an arduino sketch to replace the factory code, but we figured out the “cut out the battery and jumper to 3v “ solution so I never did. Saved about $4000 in thermostats replacements though.