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Simple Multiplexing Hand-Held Control UnitMultiplexer consists of series of resistors, each shunted by single-pole, single-throw switch. User operates switches by pressing buttons or squeezing triggers. Prototype includes three switches operated successfully in over 200 hours of system operations. Number of switches accommodated determined by signal-to-noise ratio of current source, noise induced in control unit and cable, and number of bits in output of analog-to-digital converter. Because many computer-contolled robots have extra analog-to-digital channels, such multiplexer added at little extra cost.
Document ID
19890000429
Document Type
Other - NASA Tech Brief
Authors
Hannaford, Blake (Caltech)
Date Acquired
August 14, 2013
Publication Date
September 1, 1989
Publication Information
Publication: NASA Tech Briefs
Volume: 13
Issue: 9
ISSN: 0145-319X
Subject Category
ELECTRONIC COMPONENTS AND CIRCUITS
Report/Patent Number
NPO-17308
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.