I’m sure this tip will be useful for some of you out there who use Airbot’s fantastic flight controllers like the OMNIBUS F3 AIO Pro or OMNIBUS F4 AIO and have some trouble with flickering or disappearing OSD.
To get clean video without noise you actually have three options (to power the camera).
- Get clean power from a PDB with some kind of filtering.
- Get clean power from OMNIBUS FC.
- Get clean power from your VTX (video transmitter).
My choice was to get the 5V for the camera from my VTX because it delivered very clean power and the video was perfectly clear on my previous builds with Foxeer TM25 (40CH 5.8G 25/200/600mW Switchable VTX). However I had the problem that my OSD from OMNIBUS F3 Pro was flickering when applying throttle. It turned out that the ground circuit is not closed properly. After fixing that I had extremely clean video and no OSD issues at all (see wiring picture).
Please note that this is not a workaround for something that is broken on the FC. It’s just a fix for something I messed up.