Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bionet!agate!ucbvax!decwrl!vixie!pacbell!att!ihlpl!knudsen
From: knudsen@ihlpl.ATT.COM (Knudsen)
Newsgroups: sci.electronics
Subject: Re: Stepper Motor
Summary: Ball & Disk alive & well on desktop
Message-ID: <11065@ihlpl.ATT.COM>
Date: 5 Jul 89 22:32:51 GMT
References: <7137@cbnews.ATT.COM> <1137@cbnewsc.ATT.COM> <19588@cup.portal.com> <3262@kitty.UUCP>
Distribution: usa
Organization: AT&T Bell Laboratories - Naperville, Illinois
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Ball and disk integrators are beautiful and the SMithsonian has a
gorgeous Henrici Harmonic ANalyzer (19th centruy FFT box) on
display with several of them working in parallel.

But you probably have a B&D integrator on your desktop right now.
The second most valuable "mouse" to come out of California.
Open it up; you'll see two disks bearing on the ball, driving
opto-encoders most likely.  Same good old principle.

[BTW, California's 1st most valuable mouse was created by Walt D.].
-- 
Mike Knudsen  Bell Labs(AT&T)   att!ihlpl!knudsen  knudsen@ihlpl.att.com
  Round and round the while() loop goes;
  "Whether it stops," Turing says, "no one knows!"
Shotguns -- just say PULL!