I have been working with the arduino and have been having troubles with interfacing it with an LCD 5v from sparkfun.
my problem is set up the lcd with 4 and then 8 bit using the LCD header file and cpp files in the hardware libraries.
LCD pin1 GND LCD pin2 5v LCD pin3 10k pot from pin2 LCD pin4-pin6 RS-RW-E LCD Pin7-14 Datalines LCD pin15-16 LED Back light
my problems start by just pluging the thing in. the Contrast only works correct if I plug the thing to ground. I don't this this is right. The pot should be on the voltage side?
The only thing that I have been able to get out of the thing is it sets and then boots and then it displays two four blocks
XXXX - full blocks XXXX
Does anyone have an idea as to what is going on?