Hello everybody, I replaced the LCD on my 3D printer and tried using the old one with my Arduino Uno. The LCD is a 20x4 character one with 16 pins. It is on a shield with 5 more buttons and the necessary resistors. I followed the PCB traces and wired it to the Arduino like this . After uploading a …

Weird Bugs using 20x4 LCD with Arduino Uno

anon65714639 May 24, 2018, 6:51pm 5

This is the wiring:

Here are the PCB traces: