Arduino mobile robot

I redesigned http://www.thingiverse.com/thing:524211 to make it more simple, and added a 9V battery container.

Update : The original thing is no longer available, so I added original source code and schematics in ZIP file. It's not from me, don't ask me questions about it, I just put here what I downloaded on the original thing. If you are the author and don't agree with that just tell me and I will remove it.