We designed this 5V and 3.3V regulated DC power supply for rapid prototyping. This board accepts a norminal 9V 2.1mm Barrel connector, and outputs regulated 5V and 3.3V with a combined 200mA.  The 5V and 3.3V output headers are standard 2.54mm spacing so you can insert directly onto breadboard.

Download:

•  Schematics