Hi all again!
Now i'm having a strange issue with a character LCD display. Everything works fine most of the time, but sometimes, when both the AVR and LCD are idle, the LCD shows garbage in the display. The AVR is connected to the LCD, and it's a few cm's from it.
The AVR keeps working, but the LCD remains showing garbarge (which changes when the AVR writes to it, but it's still garbage).
I can only imagine PowerLine noise, even thou there is a LM7805 just for the LCD, with filter caps and all that stuff. Maybe LCD is more sensitive to noise? Maybe RF noise?
I'm thinking of "plugging" a pull-up to the R/W line, as near as the LCD's controller as possible, to prevent unwanted writes.. but don't know.
Thanks a lot!