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Article #4116

Re: 24 hour analog Clock Wanted

#4116
From: Jordin Kare
Date: Thu, 27 Jul 1995 00:00
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In article <faludi-2407951945190001@f.faludi.com> Robert Faludi,
faludi@faludi.com writes:
>I'm looking for a source where I can buy a 24 hour analog clock (one
where
>the hour hand makes one full rotation every 24 hours instead of the usual
>two). 

Ah, "Analog clock", such a wonderful retronym.  Like "Acoustic guitar"
or "propellor airplane".  

I did once see a true analog electronic clock, though.  A fellow down the
hall at MIT who built instrumentation systems built one 
just for the hell of it.  It was a very large, very low 
leakage polystyrene capacitor, a glass-cased resistor (100,000 Megohm, as
I
recall) and a very high quality instrumentation amplifier, connected
as a standard op-amp integrator.  The amplifier output drove a large
panel meter, with markings from 0 to 24 hours, plus a precision comparator
that reset the integrator whenever the output reached 24 hours....

He also had a Minuteman I guidance computer hooked up to an ASR-33 as
his personal computer....

	Jordin (Tick! Tick! Ve haff vays of making you TOCK!) Kare
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From: Jordin Kare <jtk@s1.gov>
Subject: Re: 24 hour analog Clock Wanted
Date: 1995/07/27
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