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The Whiffletree A mechanical digital-to-analog converter

Early calculating devices and computers used mechanical digital to analogue converters. This video describes one based on an arrangement of metal bars called a "whiffletree" - also sometimes called a "whippletree." It shows, briefly, the whiffletree used in IBM's revolutionary selectric typewriter and then illustrates the principles of a whiffletre
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engineerguy
Uploaded 11/09/2010
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