I think you could just hook up an old pen plotter to your whiteboard. https://www.youtube.com/watch?v=6_pwzqPk6Gg https://www.youtube.com/watch?v=6_pwzqPk6Gg

I think you could just hook up an old pen plotter to your whiteboard. https://www.youtube.com/watch?v=6_pwzqPk6Gg https://www.youtube.com/watch?v=6_pwzqPk6Gg [EDIT] whatever it has been done before: https://www.youtube.com/results?search_query=pen+plotter+whiteboard https://www.youtube.com/results?search_query=pen+plotter+whi... But this of mechanic is certainly unique and adds a lot of clumsy robot charm. Wonder how easily you could store human inputs with a kind of (reverse) Pantograph type device for reproduction. http://en.wikipedia.org/wiki/Pantograph http://en.wikipedia.org/wiki/Pantograph