O.k. so, since I'm still a novice with all this and only have a mild knowledge of electronics... now that I'm aquiring diodes, housings, laserbugs, optics and other various and sundry bits... I guess I need to think about a power supply for setting things up and testing them. I know it's important to be able to adjust both voltage and mA. Any suggestions from people on a brand or model that's relatively inexpensive to get started with?