Please compare the pinout on the GLCD and our adapter, both must be same, otherwise, need to re-route the pinout
Need to use the pot on the GLCD to adjust the contrast, not the pot on our adapter
Also, don't forget to short the "P" jumper on the GLCD
tannenba
Total Posts:
6
Since:
2019-Feb-26
From:
United States
RE:128x64 GLCD (ST7920 V2 and Universal Serial Adapter
Posted at:2019-06-27 02:31:47
Pinout printed on GLCD matches your ST7920 chart. Tried different setttings of the contrast on the GLCD. I soldered female pins to the serial adapter and male to the GLCD
so cannot get at the GLCD's trimpot when the serial adapter is connected. I still only get a blank screen with a bright backlight. This GLCD did test out ok using the
U8GLIB graphics test.
Service
Total Posts:
398
Since:
2013-Dec-22
From:
Canada
RE:128x64 GLCD (ST7920 V2 and Universal Serial Adapter
Connect Pin# 15 to VCC(That what "P" jumper does, Important: Don't short "P" and "S" jumpers at same time), if still not work, please show a picture of the back assemblered GLCD with our adapter
tannenba
Total Posts:
6
Since:
2019-Feb-26
From:
United States
RE:128x64 GLCD (ST7920 V2 and Universal Serial Adapter