20 x 4 LCD with 4Bit Library

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi Everyone,

I got my 20x4 LCD working with the Arduino using the 4bit library. I can get text to display on all 4 lines, but noticed that the display gets fuzzy if I load it up with characters.

As an example if I print "Line X Test" to all 4 lines it looks perfect. If I try printing "01234567890123456789" to all 4 lines the text gets blurry or faded. If I then adjust the contrast a bit I can see the text clearer, but it is still fuzzy and sometimes has lines through it.

Any help or direction on where I should look would be appreciated. Everything seems to work just has trouble when I send more data.

thanks,

Joe

2

That almost sounds like a bad LCD. I don't suppose you have another one to test?

Is you send lines that have 10 spaces at the front and 10 characters at the end are they still fuzzy?

(* jcl *)

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