sudomod

Hi, I'm trying to connect a 4.3 inch monitor to my pi 0, but when I did it was flickering so much it was unreadable. The screen normally runs on 12 volts. I checked the wiki and also this thread on othermod and I found some boards that looked similar but not exactly the same.
https://othermod.com/community/hardware ... er-boards/

Does anyone know how/if I can convert this to run on 5v? Thanks.