Zero detect and sync to AC with P1?
Is there any chance this would have a value for fan speed control: Zero crossing detect opto triac driver ie MOC3041 and triac BTA40_600 and some other device to detect zero crossing. Have the Prop turn on a pattern of cycles for a pseudo PWM. 50% duty = 1 on then next off. 1 2 on then 3 off. 3 on 1 off. 3 on 2 off. etc. The point being to reduce noise by not turning on the triac at random places. If so what would a nice device be to look at the AC and fire a logic level output for the prop to lock to cycle by cycle.