16 x 2 LCD Problem?
Posted: Fri Aug 31, 2012 5:20 pm
Hi guys, the question is not flowcode related, but i know you are all pretty awesome in helping, so here is the problem. I have a Canakit UK1133 board with a PIC 16F616 MCU on it. It is used to control motor with PWM. I have modified the board to remove the frequency potentiometer and put a hall effect input at this place so i can closed loop control the motor with rpm feedback. Everything works flawlessly exeot for the lcd part. There is a pin header port for an external LCD, normally they use a 8 x 2 LCD they are selling, but i want to use a 16 x 2 i have here. I have recreated the complete (exact) schematic to a breadboard with a lcd conected directly to the breadboard and everything is working, the LCD initialize and show what i have programmed, but as soon as i connect it to the pin header port to a flat cable connector to the LCD, i got the power but the LCD never get initialized. I have verified everything 100x time pinout is perfect it have traced pin per pin to make shure all connection are OK and they are. So now the question is, does a 1 meter flat cable run is too long for the LCD display ? This is the only thing i can think of right now ? Or maybe any other suggestion will be really appreciated. thanx a lot!