O'Reilly logo

Practical Electronics for Inventors, 4th Edition by Simon Monk, Paul Scherz

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

CHAPTER 11

Voltage Regulators and Power Supplies

Circuits usually require a dc power supply that can maintain a fixed voltage while supplying enough current to drive a load. Batteries make good dc supplies, but their relatively small current capacities make them impractical for driving high-current, frequently used circuits. An alternative solution is to take a 120-V ac, 60-Hz line voltage and convert it into a usable dc voltage.

There are two approaches to this. The more traditional approach is to use a step-down transformer. The other approach is to use a “switch-mode” power supply. This latter method has all but taken over from step-down transformers in recent years, and is the reason your “wall-wart” black plastic power adapters have become ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required