This was featured on HackaDay a while back. Some cool documentaries in the comments: http://hackaday.com/2013/10/29/retrotechtacular-automata/ http://hackaday.

This was featured on HackaDay a while back. Some cool documentaries in the comments: http://hackaday.com/2013/10/29/retrotechtacular-automata/ http://hackaday.com/2013/10/29/retrotechtacular-automata/