Looking on the internet I was not able to find answer to this...
I have followed this tutorial to have a standalone arduino on breadboard: http://arduino.cc/en/Main/Standalone
Currently I use, as power supply, my Arduino UNO connecting directly the 5V and GND to the breadboard + and - (ignoring the 5V regulator on the tutorial).
I'm wondering if I can power supply the breadboard using 3.3V instead. Are there any side effects, or it is going to work?
I think that doing this also the serial connection and outputs will work at 3.3V, is it correct? Can I than connect it to another device with 3.3V serial interface?