3THE REGULATED POWER SUPPLY
Whether you use a standard bench power supply or run your Arduino off the USB port of your computer, sooner or later you’re going to need a stand-alone, regulated power supply capable of providing a variable voltage. This project shows you how to make exactly that, using only a handful of inexpensive parts. A variable power supply is one of the most frequently used tools in many workshops. This one is easy and fun to build, and you will find that you end up using it over and over again.
When set for 5V or 3.3V, the Regulated Power Supply can power most Arduino projects with ease. You can also use it to power some ancillary ...
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