This is my first attempt at a computer controlled light show for our Christmas lights. Everything was DIY including the software which I wrote in Processing (processing.org). Simple wiring using parallel port output to switch some 120v relays. Only 8 channels, 1500w per channel max. Next year I'll be trying for many more, dimmable, LED's and DMX control of our RGY lasers! My website is JackKern.com (less info)