Hello, ive got 240by128 20 pin lcd with cob light from medical machine and got problem connecting it to arduino nano
I cant figure out how to conect it
Its model is cgm240128-6h2(2) by creation
i figured out that pinout looks like SLG240128C but i have -5volts on 18 pin and 20 volts on 20 pin
so i dont know how to add contrast
According to Surenoo 240128 Graphic LCD Module pin 18 is font select. It should be logic level not something negative.
Probably this is not the correct pin-out for your display.
I would assume that the outer pins from a 10K pot go to VEE and VDD. The wiper goes to V0.
i couldnot find exact pinout for my display
also i tried connecting v0 straight to pin 20 and some pixels blinked, then my esp died
I think there is a chance that you fried everything...
maybe, before i connected it my esp was working fine