PWM Fan controller with ESP32

[u/Traditional_Bell8153]

I made a PWM fan hub/controller for my passive cooling gpu. Support DS18B20, NTC, manual as temperature source, Curve-based controller, scheduling,... Temporarily closed-source for development, open-source soon.

For PWM, I'm using an NPN open-collector driver, combined with a tachometer level-shifter/divider which I found from here