Somewhat similar to the early work on televisions: http://en.wikipedia.org/wiki/Mechanical_television http://en.wikipedia.org/wiki/Mechanical_television One o

Somewhat similar to the early work on televisions: http://en.wikipedia.org/wiki/Mechanical_television http://en.wikipedia.org/wiki/Mechanical_television One of our undergrad elec courses had a lab where you built one of these. It's kind of a trip.