It is all very simple and uses only 6 PINS TO INTERFACE WITH!
Note: the image is not mine and comes from http://www.micro-examples.com/public/microex-navig/doc/078-lcdscope.html
Step 1: Parts needed
1x '''Arduino (any kind will do)'''
1x '''HD44780 character LCD'''
'''lots of non-stranded wire'''
One 10k Potientiometer