When running two servos, receiver, APM, from an additional 5.0V (adjustable voltage) UBEC, I can correctly power everything connected to APM. However, when I switch to 4 servos, APM, and rc receiver, I loose the ability to transmit any radio information. It seems to me that the power requirements are being pushed to the limit in this situation. Is there an easy chart for understanding the voltage requirements of the ammenities I wish to power? I am scared that I will fry APM if I increase the voltage too high.
Eventually, I'd like to power GPS, Airspeed Sensor, 4 servos, APM, the radio receiver, and Xbee. Any help would be appreciated!