I am trying to power an APM 2.5 in a 6S system so I am using an Attopilot voltage/current sensor but it doesn't power the board. Can I power it by plugging in one (or multiple?) of the connectors from the ESC's to the output rail with JP1 connected? This is the ESC: http://hobbyking.com/hobbyking/store/__25366__Turnigy_Multistar_45_....
It has a 5.5v 6A BEC. Is this too much voltage?
It's in a hexacopter by the way so no servos to power.
Thanks for the info. I am running it from one UBEC for now but I'm ordering a 5v BEC.