arduino with internal oscillator on 1Mhz

Forum 2005-2010 (read only) Hardware Development
18

we were discussing changing the clock frequency in software.

you can't change the voltage in this way.

here are a couple of options:

  1. buy an arduino that will run on 3.3V (e.g. arduino pro mini)

  2. build a circuit like the Adafruit minty boost that takes 2 x AA and gives you 5V. This is useful if you also have other parts needing 5V anyway. I did it myself very recently.