I know this has so been done, many times, but I felt like doing it myself from scratch. I only have the first five numbers, but I'm getting somewhere. Eventually I hope to have a huge map full of redstone contraptions. I'll put up the download for the world later (and MCEdit Schematic if I can find out how).

If you can actually see the wiring, and have any suggestions for a smaller setup, please tell me.

MCEdit schematic is now covered up completely. I realize some people might want the exposed version for MCEdit and I'll do that next contraption. I also found that people don't spawn near the contraption with the world download, so the coordinates for the control panel are about: X: -555 Z: -175 Y: 4.