Some notes on the UV photo etch method...

I had poor results using the photo etch method, which involves a specially coated printed circuit board (PCB) which reacts with UV light. The idea is that you expose the circuit board to a UV lamp (in a dark room), with your circuit layout printed on a transparency - this is sandwiched in between a sheet of glass. The black areas of your PCB tracks on the transparency, block out the UV light so you only expose the areas that you want etched away.

After a set amount of time (15 mins or so) you take the exposed PCB and put it in a special developing solution for a few minutes. You should then be able to faintly see where the tracks are on the board. Now your circuit board is ready to be etched in Ferric Chloride solution.

I had very limited results using this method, and it involves A LOT of stuffing around and is very easy to stuff up if you don't do it exactly right.