Originally Posted By: mlord
Just use 5V through the USB connector. It is simpler for probably everyone, since most cars have more 5V sources than 12V sources these days, and those that don't can be updated with a simple plug-in dual 5V thingie.

This method is also the safest way to go, as it guarantees one can never have two power sources fighting (burning) each other at the same time. smile