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Xinyuan-LilyGO / LilyGo-EPD47

GNU General Public License v3.0
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Function of the trimmer (potentiometer)? #92

Closed dreamy1 closed 1 year ago

dreamy1 commented 1 year ago

Hello,

just wondering about the trimmer/potentiometer on the back of the pcb. What function has this part? I can't find it in the schematic.

Thanks, Stefan

valahna commented 1 year ago

Hi Stefan,

I found your potentiometer in the schematic, in Block A1 - I believe it to be a means to control the input offset voltage of the op-amp (LM358DR2G ) - at least that is my best guess :)

-Val

dreamy1 commented 1 year ago

Thanks Val,

yes, i found it. It is for adjusting the -15V supply voltage for the e-paper.

Regards, Stefan