The Mega has 16 analog inputs, each of which provide 10 bits of resolution (i.e. 1024 different values). By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the AREF pin and analogReference() function.
Happy New Years to everyone,
I have a question about the ADC in the Arduino Mega but I assume this also would apply to the other versions as well. According to the quoted text, the Mega has a 10 bits resolution meaning: at a reference voltage, that would yield .0049 voltage per unit. So if I change the reference voltage, does this also change the precision? Example: AREF = 3 volts, would the divisions or precision now be .0029.