I want to test a program i wrote by providing a square wave signal from my arduino uno and read it in the arduino due on an I/O pin. Problem is the uno outputs 5V and the due needs 3.3V. If I make a voltage divider with 560ohm and 1120ohm I get 3.3264V. Is that already too much for the due or would that work?
Also the uno has a 3.3V pin. Is that only able to provide DC or also AC Signals?