ABSTRACT
Th is is possibly the most boring chapter in the book. Skip over it if you wish, but don’t tear it out, because it may prove useful later.
Switches are useful for turning power on and off to a circuit to save battery life, for turning on and off specifi c sounds or functions, and for resetting a circuit if it freezes up. Th ey are oft en described in catalogs, on Web sites or in packaging by arcane abbreviations. Here are the main distinguishing features.
