Here you can find some information, schematic and modification of HobbbyKing’s cheap E-OSD.
Everything on that page i did almost year ago, but I think it deserves for some immortality and maybe it will be useful to someone 🙂
How it looks like?
Just as it arrived:
After removing shrinkwrap:
Yes, I did also this schematic laying around on Rcgroups from some time 🙂
This is updated version with capacitors values added (I found them on my schematic annotated by Constantine Safronov (dollop on Rcgoups)):
I have added connector for RX and TX pins to connect gps module to it. I hadn’t taken pictures during this mod, but if you are curious how to physicaly add connector, you can read about similar mods of G-OSD here and here.
This is how it looks like after modification:
Why such mod? Stock E-OSD doesn’t support gps but alternative software exists and works: CL-OSD