I've done this too. (Score 1)

I recently (may 2004) graduated from the University of Colorado with a BS in Electrical and Computer Engineering. One of my three big projects was a computer-controlled etch-a-sketch. The class was focused on real-time embedded projects using VxWorks. We used a video capture card and an x86 based VxWorks system to do line following on a captured drawing. (With the goal real time capture and drawing no time to tweak). When we started we thought we were original, oh well. It sure was a sight to see it trace out the drawing (last official act for my undergraduate degree). My professor took digital video of it working, and I hoped it was online but alas no. Why am I making the post? Just to throw in my experience and say this kind of activity is not easy but ultimately is fun.