digimike
Re: Operating atmega328 at 3.3volts, rather than 5v ?
Reply #6 - Yesterday at 22:36:35 | You do know the Duemilanove offers a 3.3V power line. So sending power to an SD card wouldn't be an issue. The board doesn't run off of the 3.3V but the voltage regulator on the board was made to off 3.3V to support ad-dons that needed 3.3V rather then 5V.
True, but 5v outputs from the arduino to an SD card need to be reduced as well. (arduino pins 10, 11, and 13).
I guess a voltage divider isn't such a problem, such as the one shown in this thread: u[/u]
I also realized (just) that an arduino operating at 3.3v, would also need a programmer for that voltage. :-?
PO'T