Post #2298959
2026-04-14 12:19 UTC
That's where the FETs come in. They pre-charge the input caps slowly and only then the contactor will be engaged.
The MCU is there to oversee that process. I.e. not engaging the contactor when it still senses a voltage difference that's too great, etc.
Replies (1)
-
@thunfisch@chaos.social 2026-04-14 12:34
@LeoDJ@chaos.social Aaaah. I see. So your circuit is connected in parallel to the contactor, and the PCB just cleverly sits on top of the contacts for the contactor. Now it all makes much more sense to me. Seems like a clever design to me to put it on there, and check conditions for safely actuating the contactor.