I'm looking for an electrical explanation of the statement here:
Warning: Do not connect power (red + & black -) from the RC10 (A10) & RC11 (A11) connectors to the servos, just use the signal lines. Power the servos via the PWM Outputs connectors. These solutions will avoid the scenario that can possibly happen when the Pan/Tilt servo draw too much current and cause the APM to brownout (reset)
I examined the APM2.5 board drawing and schematic here and the grounding is a little unclear. On the schematic, they all just go to GND, but on the board drawing some of the ground pins appear unconnected to traces. I checked for continuity, and there is no continuity between the PWM grounds and the A10/A11 ground pins. By the way, my power setup is that I have J1 enabled and I am using an ESC to power the board.
Can anyone figure out, electrically, what is between these two sets of ground pins?
Ground pins appear unconnected to the traces:
PWM ground just connected to GND:
analog output ground also connected to GND: