A bench power supply is a must for any hardware tinkerer, this DIY Digital Bench Power Supply by Microsyl is a bit high end and much more than you need but in the end you will have a great system to enhance your bench. If you would like to make one from parts you probably have laying around you can make a cheap bench power supply from a spare ATX computer power supply.

Via: Hack a Day

“ Features

• Output Voltage adjustable from 0 to 25v
• Output Current adjustable from 0 to 5amp
• Digital reading of set points for current & voltage and output current & voltage.
• No need of multi tap transformer or center tap transformer
• Short circuit protected
• Very low cost”