October 2012
Beginner
294 pages
12h 41m
English
A rotary switch makes an electrical connection between a rotor, mounted on a shaft that is turned by a knob, and one of two or more stationary contacts. Traditionally, it was the component of choice to select wavebands on a radio receiver, broadcast channels on a television or inputs on a stereo preamplifier. Since the 1990s, it has been substantially superceded by the rotational encoder. However it still has applications in military equipment, field equipment, industrial control systems, and other applications ...