Post links and attach files for documentation here, also chat about these docs freely

User avatar
By nidayand
#61183 This is a fairly old thread but here are my 2 cents..

Using a potentiometer I monitored the ADC value and when I reached 1024 as output and on my particular device I reached 1.2v as input voltage. I.e. ADC input is 0-1.2v.
I also measured the ADC pin with digitalWrite(A0,1) (optionally analogWrite(A0,255) ) and I received 0.6v as output. I.e. half the max ADC input value.
I guess the max value might differ somewhat from device to device..
I'm converting from 3.3v to 1.2v using a resistive voltage divider with R2=100 ohm and R1=180 ohm =>1.179v ~1.2v.