I have the RC522 RFID read/write module and would like to use it with arduino? I'm puzzled at the moment which one to choose in order not to deal with voltage supply for RC522, because RFID module requires 3.3V. And to be frankly, I wouldn't like to take extra voltage converters (5V to 3.3V or vs) while connecting RFID module to above aforementioned options. What can you advice? Thanks beforehand!

P.S. The form factor plays the significant role in my project, so that I prefer little arduino board to other versions like UNO, MEGA and etc.