I'm working on a project where I need 7 analog pins. I read the datasheet of Ardnuino Uno : 6 analog pins available. So I decided to use an arduino mega with 16 analog pin available. Then I saw the arduino nano had 8 analog pins. But when I read the datasheet, both arduino uno and nano use Atmega328 In my final project, I will not use the board but only the pdip chip (analog pins are from pin number 23 to 28). Is it possible to "convert" another pin of the pdip to be an analog pin ?