Supply derives 5 and 3.3V from USB port This circuit derived its power from a USB port and produces 5 and 3.3V supply rails for portable devices, such as digital cameras, MP3 players, and PDAs. (17-Sep-2005)---553
Transformerless Power Supply A power supply project without using a power supply. This can save the expense of buying a transformer (16-Sep-2005)---488
Universal PSU A Universal Power supply based on the L200 regulator, which includes an outboard pass transistor to boost output currents up to 4 amps.
(16-Sep-2005)---499
