This is a demonstration project to show connecting a web site to a real-world device. Since my ISP Verizon seems to be blocking all in-bound connections it is no longer on line.

I first added stepper motors to this Etch-A-Sketch a couple of 7(!) years ago. The stepper motors are from 5 1/4" disk drives. These can be had at hamfests for a dollar or less and usually contain a nice 12 volt stepper motor. The belt and pulleys are from Small Parts They are called timing pulleys and timing belts, they cost less than $20 total. I made the brackets from sheet metal and used sheet metal screws to attach them to the Etch-A-Sketch plastic frame.

This is a picture of the web server and Etch-A-Sketch controller. You can see the ethernet cable plugged into the RCM 2200
on a piece of perf board, I have added two ULN 2003s to provide the high current drive for the stepper motors, and a voltage regulator but that is all there is to the hardware; the Rabbit 2000's outputs are connected directly to the ULN 2003s which are connected to the stepper motors by the ribbon cable that can be seen in the top right. The ribbon cable on the top left carries the signals from the Rabbit to the ULN 2003. The ULN 2003 has a built in freewheeling diode to quench the inductive kick when switching an inductive load.

The Ethernet Etch-A-Sketch is able to draw circles and diagonal lines by coordinating the movement of the two stepper motors using all integer calculations by using Bresenham's algorithm.

Here are some screenshots I took before shaking the screen