October 2012
Beginner
294 pages
12h 41m
English
A transformer requires an input of alternating current (AC). It transforms the input voltage to one or more output voltages that can be higher or lower.
Transformers range in size from tiny impedance-matching units in audio equipment such as microphones, to multi-ton behemoths that supply high voltage through the national power grids. Almost all electronic equipment that is designed to be powered by municipal AC in homes or businesses requires the inclusion of a transformer.
Two small power transformers are shown in Figure 15-1. The one at the ...