Hi bobc :
Now I am trying to make the lcd worked on RAMPS-FD , I have make some PCB which you design in your github , I have soiled ,I change 74HC07 to 74LS07 .is it OK to do that ? NOW MY LCD (smart controller,2004 ver and 12864 ver both) no working ....I am sure the LCD and 74LS07 is OK ,cause the RAMSP-FD and LCD working good with arduino MEGA2560 ,and I have checke the IO D16 D17 D23 which 12864LCD spi IO ,IO is OK ...I am thing whether
74LS07 is a good choice for 3.3V logic signal ? I have brought a logic analyzer ,waiting shipping .....longlong time ..... POOR....
DO you have try LCD ?
Now I am trying to make the lcd worked on RAMPS-FD , I have make some PCB which you design in your github , I have soiled ,I change 74HC07 to 74LS07 .is it OK to do that ? NOW MY LCD (smart controller,2004 ver and 12864 ver both) no working ....I am sure the LCD and 74LS07 is OK ,cause the RAMSP-FD and LCD working good with arduino MEGA2560 ,and I have checke the IO D16 D17 D23 which 12864LCD spi IO ,IO is OK ...I am thing whether
74LS07 is a good choice for 3.3V logic signal ? I have brought a logic analyzer ,waiting shipping .....longlong time ..... POOR....
DO you have try LCD ?