You can use the internal voltage reference, that is 1.1V so it spreads the 4096 levels over a smaller voltage and you have a step that is about five times smaller. Look up how to do this in the reference documentation built into the IDE.
You can use the internal voltage reference, that is 1.1V so it spreads the 4096 levels over a smaller voltage and you have a step that is about five times smaller. Look up how to do this in the reference documentation built into the IDE.