I had arduino duemilanove for my project. Im new for arduino. I get to know the arduino because i heard its easy. May any 1 guide me how to do adc programming? Or can i get the coding for 5V adc? Im doing for my project. Thanks!
I think your question is lacking some context.
The ATmega has a ADC on it. Functions like analogRead() allow you to read its current value.
The arduino software comes with a MASSIVE set of example code. Use it!
Moderator edit: moved, thanks. @op, hint: analogRead()