what is the limit of the Aref and analogue pins (voltage wise).
Since I want to know if I can connect a 9v supply to them?
From a data sheet:
"Voltage on any Pin except RESET
with respect to Ground ................................-0.5V to VCC+0.5V"
So -.5v to +5.5v is the safe range. No way +9vdc can be applied directly to a pin (except reset for high voltage programming mode).
Lefty