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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).

minto
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3 Answers3

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Arduino Pro Mini comes in 3.3v and 5v versions.

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You can use different possibilities:

  1. Use Arduinos which are already 3.3V by default (like Pro Mini, Due if I recall right)

  2. (removed after valid comment of minto below)

  3. Use 5->3.3V adapters, most general devices have adapters which can be bought separately (for under 1$) to convert 5 to 3.3V (including logic level converters)

Michel Keijzers
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What about just getting the bare chip so you can run it at whatever rail you want? Seems like the simplest and easiest solution.

dannyf
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