Hello,
I tried use my old lcd which only accepts 3 wire(STR, CLK, DATA) 5V logic (source code, schematic)
I tested 5V arduino mcu, works well but the problem is that I want to use 3.3V mcu. so I have to use logic level shifter
signal oscillate sometimes like below. what should I check?
Yellow => strobe
blue => data
pink => clock
here is wiring diagram
(color legend is same as scope)
thank you for reading my post
I tried use my old lcd which only accepts 3 wire(STR, CLK, DATA) 5V logic (source code, schematic)
I tested 5V arduino mcu, works well but the problem is that I want to use 3.3V mcu. so I have to use logic level shifter
signal oscillate sometimes like below. what should I check?
Yellow => strobe
blue => data
pink => clock
here is wiring diagram
(color legend is same as scope)
thank you for reading my post