The board can now say messages sent to it via a serial device - step 12 covers the changes I made!
This is part build-log, part how to. I hope I give you enough info to inspire you to make something similar.
Here is a video of the completed board with the lid off:
And here is a video of the completed box I had ready for Halloween 2007:
This new clip shows the serial communications link working:
Step 1: Stuff you will need
Some wood to suit your design. I messed up when I built mine, and used some poorly finished pine and my not so great woodworking lead to nasty corner joints, which left me needing to veneer the wood with a thin plywood... so keep this in mind, and perhaps use some nice ply to start with, and skip needing to do the annoying veneer finish. Alternatively, you could use the oldest and most worn timber, for that 'ye olde' antique look. Heck, be creative and make it your project!
Something to drive the stepper motor (I'll provide a sample circuit and the microcontroller code) but if you already have something else, or know what you are doing, then knock yourself out, you'll figure it out from the steps I have outlined....
A microswitch for the home position sensor (I got mine out of an old printer)
A power supply (12v 400ma plugpack or 12v worth of batteries if you want it cordless)
Some hookup wire
5 minute epoxy
Items I used but you can substitute with something similar: piano wire, brass tubing, a strong magnet from a broken HDD, brass shim, copper shim, brass split pins, brass box corners, rubber o-rings, scrap aluminium angle stock, screws, small piece of self adhesive felt, hotglue.
Basic tools: Pliers, cutters, soldering iron