[Courtesy of Joedy Drulia (joedydrulia "at" hotmail.com), November 1998]
NOTE: Power from a wall socket can harm or kill you. Please do not attempt construction of this unit unless you know what you are doing and understand how to work safely with electrical construction projects!
Here are the parts and their corresponding part numbers from Radio Shack used to assemble the power supply. Print this page out and take it with you to Radio Shack for easy reference. Credits go to Jim Reith of RA Cores for this information.
A dimmer switch is also needed. These are standard home light dimmers. Get one that also serves as an on/off switch (either push on and off or rotate on and off.)
Make a wooden or metal box to house all of these devices. Some nice features you can add are: use jacks on the outside of your box to allow for the pulling wires to be connected and disconnected and use a meter wired in-line on the output side of your transformer for accurate electricity measurements.
Here is a picture of how to put it all together.