I've been using the SD card breakout board supplied by cutedigi....http://www.cutedigi.com/product_info.php?products_id=4435
It's worked fine on a breadboard, but I'm now trying to make a mega shield with a SD card onboard. The breakout board comes with an SD card holder plus half a dozen extra components, from what I can make out these extra components are only there to provide 3.3 volts to the card. Does anyone know if this is correct? I think I only need to include the card holder on my shield, and there's no need for these extra components, I think can just use the 3.3v supply from the board, again does anyone know if this is correct?
If I am correct on all counts, then why does the breakout board use these extra components, is it designed for for prototyping non-arduino systems, or does it date from a time before arduinos had a 3.3v supply?