Okay let me run this by you. What I was thinking is read a 12v batt. I know i can only but 5v in the the mega so was going to try to come up with a divider network. If i can get say 13.5v to output 4.5v from the divider network. Then feed that into the mega that would give me 4.5v on the read out. Do you thank i could make the readout say 13.5v when it is really getting 4.5V?
I would not care at that point if it did not read from 4.66 to 5v. I have tried just doing a + (some #) after the analogRead but that seems to go up by 10's. Just an idea.