i am working on a project which implies the control of a BLDC motor in 3 phases.
For this type of motor the switching of the phases must be sync with monitoring the "back-emf" signal from the unpowerd phase.
My question would be, what is the common practice to measure a zero falling edge signal at 30 degreese after the sinewave is passing down trough 0. A ADC triggerd by a fixed timer value?
I dont have very much experience with ADC's in tandem with timers