What's the sketch needed to make this work?
Is the following sufficient to upload to the Arduino Uno R3?:
Chagrin, thank you very much for clarifying that it needs 9v, as I was only powering by USB. The MOSFET is the L7805VC full info here --> http://www.makershed.com/v/vspfiles/assets/images/l7805.pdf
A 7805 is a voltage regulator, not a mosfet. Completely different things -- you've got the wrong part.