i am encountering a very strange problem and dont know if anyone else found it before!
when i am taking power from only the 3 cell li po battery of 3300 mah and attempting to arm the red light turns to blue and red as usual but the motor doesnt start to rotate but if i connect a data cable from a laptop to the micro usb port it arms and behave normally and all the motor starts.
what is the reason? is it for low voltage or current or my apm 2.5's failure??
what should i do now to drive it without using the micro usb port??
my motors are 1400kva and esc 40 A
a schematic circuit diagram is attached here. i'll be grateful if you have a few minutes to see the circuit and help me out.
thanks in advance :)