Power Supply and LEDs Answered

There are some good ibles on power supply conversion to into a benchtop power supply:

here

and here

I have about 8 old computer Power supplies at home; some I have converted to "multiple range P/S's" and one I used for a test supply. Since there is a variety of outputs, there is a lot you can do with them. LED's can be used for any low light, lighting project from ornaments, to indicators to switches (using one of many optical sensors one can "turn something on/off when the LED lights, etc.). Lots and lots can be done.