October 2012
Beginner
294 pages
12h 41m
English
An AC-DC power supply converts alternating current (AC) into the direct current (DC) that most electronic devices require, usually at a lower voltage. Thus, despite its name, a power supply actually requires an external supply of power to operate.
Larger products, such as computers or stereo equipment, generally have a power supply contained within the device, enabling it to plug ...