Search wiring.org.co:

This example is for Wiring version 0024+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.

LD33V 3.3 Volts power regulator by BARRAGAN
Demonstrates how to connect a LD33V power regulator to get 3.3V regulated power with and without decoupling capacitors Decoupling reduced noise from the power supply.