Hi I’m using a skid with a telemetry and lidar.
Telemetry did not has enought power from cube2.1 and finally I attached a Ubec that powers out 5V 10A.
The A2 lidar has the motor rotation & power connected to a Ubec. Telemetry too.
In order to work properly I attache GND to GND telemetry2 and Lidar Works
Telemetry has to be powered before start pixhaw2 if I want the board works. If I power later the telemetry did not work
Any idea how to power all the systems? the is any device to power all the systems? I saw this board: https://www.mauch-electronic.com/power-cube-v2 but I did not trust a lot 
Thank’s for your help
Eduard