user36925: I am fairly new to Arduino. As far I know all official Arduinos run on 5 volts. Or there is Arduino versions that run from 3.3V? I need use Arduino with devices which chipsets all use 3.3V logic level. Do I need modify Arduino to make it  3.3V powered, like described in this Tips, or there is another way? I plan get Arduino UNO R3 ATmega328P board (comes with bootloader for Arduino UNO ZT).

user-1: Arduino Pro Mini comes in 3.3v and 5v versions.

36925: <p>I am fairly new to Arduino. As far I know all official Arduinos run on 5 volts. Or there is Arduino versions that run from 3.3V? I need use Arduino with devices which chipsets all use 3.3V logic level. Do I need modify Arduino to make it  3.3V powered, like described in this <a href="https://learn.adafruit.com/arduino-tips-tricks-and-techniques/3-3v-conversion" rel="nofollow noreferrer">Tips</a>, or there is another way? I plan get Arduino UNO R3 ATmega328P board (comes with bootloader for Arduino UNO ZT).</p>
 -1: <p>Arduino Pro Mini comes in 3.3v and 5v versions.</p>
