Omnibus F4 Pro V3 power issue

Hardware Multirotors
#1

Hi, I have a Omnibus F4 Pro V3 flight controller.
I have welded the wires from the battery to the flight controller for the voltage and current measurement (positive and negative), but when I connect the battery the flight controller doesn’t turn on.
When I connect the micro usb cable instead the flight controller turns on and works properly.

It should have a built-in bec or must I use an external bec?

#2

Arlitra,

Can you post a photo of your setup?

#3

The connection from the battery should go to the large pad labelled “BAT+” and the large pad on the opposite side of the board labelled “GND”.

#4

I did what @cbf123 said.

On the top:

top
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I connected the positive of the battery to the pad labelled BAT+ and the positive of the power distribution board to the pad labelled MOTO_VCC

On the bottom:

bottom
bottom1010×676 138 KB

I connected the negative of the battery in parallel to the pad labelled GND and to the negative of the power distribution board.

#5

Any suggestions to solve this problem?

#6

That looks like it should work, though I’ve never used that particular board.