I'm trying to build my first drone and I have a PXFMini for a flight controller. I see there are multiple ways to power the PXFMini and as I'm still acquiring parts I have been powering it so far through USB input on my pi0 (powered from a wall outlet with a 5.0V, 2.0A adapter).
My multimeter only reads 2.34V coming off the PPM-Sum input rail. Is this expected? Should I only be getting partial power to any components when using USB power?
(The problem I've been trying to solve: I've been trying to bind my FrSky X9D+ transmitter with an X8R receiver, but I cannot seem to get power to the receiver. Between the two sits a PPM encoder, which seems to be powered, but the LED on it flickers.)