after having learnt that with a simple voltage divider, the Arduino Uno can have 3.3V output where I want, I am interested whether this works easier with simply connecting IOREF to 3V3.
As far as I know, supplying voltage to the IOREF pin changes the input/output reference which is normally 5V.
Then I connect, for example, D7 to the pin of some module that works with 3.3V.
Will that work, do I understand it in the right way?