Just setting up my Pixhawk. I can’t find a definitive answer to powering the servo rail. Mine seems to work OK with out power there but I don’t want to risk a brownout. Should a run a 5v supply there through a BEC?
Pixhawk requires a power supply to the servo rail. Either from your ESC’s or a BEC. If it’s working right now you may be getting power to it with your ESC(s).