MultiWii

And I forgot to add that I do have a Li Po battery plugged in.

Thanks for your reply. I really appreciate it. I'm using Emax Simon Series 20 Amp ESC for Multi-Copters. They have built-in 5V, 2 amp BECs. I tested and am getting 5V from the 3 ESCs into FC D9, D10 and D11 (and only a small voltage to D3 which is connected to a servo). So the FC is getting 5V but s...

As a father and son project we built our own tricopter, not from a kit. We're learning a lot but have a lot to learn. I'm guessing this is a simple, newbie question for any of you who know what you're doing: When the FC is plugged into usb, everything seems to work perfectly, even before turning on ...