  Makezine_COTM_Transformers-BadgeNovember is Transformer month,
and we’ll be featuring blog posts about those handy components
used for transforming voltage. The following is an excerpt from
Charles Platt’s definitive Encyclopedia of Electronic
Components, Vol. 1:  What It Does  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.  trans1 Component of the Month: Transformer  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.  The one at the rear of the image above is rated to
provide 36VAC at 0.8A when connected with a source of 125VAC. At
front, the miniature transformer is a Radio Shack product
designed to provide approximately 12VAC at