I decided to be properly cyberpunk, my bar for Neotropolis needs exhaust fans on the outside. To be cinematic, the fan should turn pointlessly slow.

I bought a fan with a speed controller. It seem to use 5V PWM. Sending my own PWM, ~8% is the lowest speed. Below that it shuts off. But I want slower still.

I'm surprised this isn't a brushed DC motor or universal motor - it uses a BLDC motor.

I suspect the easiest route will be replacing with a #SimpleFOC board, but I don't have one handy.