Flickr user Lmajilon posted this really fun project recently. The Electrographic Enlarging Sketchifier is a
robot that will read a drawing and enlarge it onto another piece of paper. This was meant to be a fun experiment, so the construction from foam board and popsicle sticks makes perfect sense. The results seem to be pretty good too. You can find several pictures of the results on the flickr page as well as a breakdown of the circuit. In case you’re still unclear as to what this is, I’ll let the maker’s words speak for the project.
A whimsical yet practical experimental drawing/sketching device. It incorporates an opto-electronic pickup, a pantographic linkage, and an electrically activated pen holder.
I vaguely recall a commercial for something like this, but purely manual, when I was a kid. Anyone remember what that thing was called?
update: Lmajilon informed me that the machine doesn’t do the drawing, you manually move it over the original and the machine controls the marker’s application to the paper. Also, that thing I vaguely recall seeing advertised was the “Sketch-o-Graph”