This may not be an amazingly complicated project, but it is a very stylish and fairly low-cost way of building a UV oven for exposing PCBs. [aris] started with an IKEA FIRA cabinet. He essentially left the framework as an empty shell and made a make shift top hinged door to enclose it. Mounted in the top is an range of 35 UV LEDs powered by an HP printer transformer. He did not have a timer circuit, instead he just viewed the clock and unplugged it at the best time. You can see from his pictures that his results were quite good.
If you don’t want that piece of furniture taking up room, and don’t mind using a little much more elbow grease, you could follow our directions on how to make your own single sided PCB. If money isn’t an issue either, you can always just get your PCBs laser etched.