Hi. I have Pixhawk 2.4.8 board (well, actually it’s Pixhack, but there should not be much difference) powered from Li-Pol 3S 6000 mAh battery via this power module - www.aliexpress.com/item/32545395023.html. There’re several peripheral devices connected: compass/gps, sbus radio, beeper, telemetry (see below). All motors and servos are unplugged.
The telemetry cable is connected to Orange PI Lite board which goal is to send the telemetry over a vpn link. The PI requires 5V to work properly.
When the battery is fully charged (>12V), everything works just great. But when the battery voltage goes below 12V (for example, 11.8V; measuring at the far end of the power module), the PI board is not starting up. It’s b/c the voltage in the telemetry port is ~4.6V instead of 5V.
Do you have any ideas why the voltage is lower than 5V and what needs to be done to make it 5V?
Your help is kindly appreciated.