I'm getting emails left right & center from people telling me about their problems with this thing. It's not a simple project - in my opinion, it requires the constructor to have some sort of formal background with electronics. If you build it, you've gotta be prepared to fault find your mistakes, because you will make them, there's a lot of wires & parts and a whole range of silly little errors that could occur.

By the way, I noticed on your photograph of the board that all the 0.1uf decoupling caps are banked up together ??? They actually need to be placed as close as possible to the power connections of each chip. (That's why there's so many of them, one for each chip) Knowing this sort of thing is relatively basic electronics and if you aren't aware of simple things like this then I highly discourage you from building it. Sorry - the truth hurts.