"@Shad, I agree, I can't imagine that the step-up converter requires that much current.. I have an email into 3DRobitcs asking if the NCP1402-5V Step-Up board is right for this application. I've asked if they could recommend another Sparkfun board if…"

"Thanks Hugues! I already have the 5V BEC from my electronic speed controller connected to the output rail via the THROT channel. Also, the AUX signal pins of the Pixhawk are 3.3v and I don't believe sourced by the rail when configured as a digital…"

"Thanks Marco, since I already have the SparkFun step-up converter I would like to get it working if I can."

"Has anyone had luck implementing the Pixhawk camera trigger with the Sparkfun Step-up Converter NCP1402 https://www.sparkfun.com/products/10968 ? It's not working for me. I believe I have the Pixhawks settings correct:BRD_PWM_COUNT: 4RELAY_PIN:…"