Adding LC Filter for FPV cam and vtx

Adding LC Filter for FPV cam and vtx… by David HK July 2016

Recently I learned something called “LC Filter”, which is able to reduce the noise of your DC power given to the FPV cam and vtx.  Ie those white lines you see in your FPV goggle from time to time, this is inherent from the fact that a single power source (ie the quad battery) is being shared across multiple components, in particular with the motors, will generate a lot of noises and causing the white lines to appear in FPV cam. This is where the LC Filter comes in.  You can refer to Oscar Liang’s page for more details on LC Filter (https://oscarliang.com/lc-filter-fpv/)

Instead of building your own LC Filter, you can buy it from Banggood for a few dollars, like this one. 

And the wiring is very simple, +&- power in from your PDB or battery source, then +&- power out to your FPV cam and vtx.  Note that the NH280 Pro original FPV cam and vtx both operate in 12V, so I connect the 12V output from the PDB, pass through this LC Filter, then to the NH280 original power input wire for the FPV cam and vtx, like this…

Test result: I have no chance of testing it in the field yet, but from my sitting room, I walked with my fpv goggle to my bedroom, it certainly has less white lines…

It works! No more while lines in fpv screen if there is no obstacle in-between the quad and your vRx, so everyone should add an LC filter to their FPV!