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Article #4116Re: 24 hour analog Clock Wanted
From: Jordin Kare
Date: Thu, 27 Jul 1995 00:00
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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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fc055,6721a80d0626a88f X-Google-Attributes: gidfc055,public X-Google-Thread: 10bfc8,6721a80d0626a88f X-Google-Attributes: gid10bfc8,public X-Google-Thread: 1046a1,6721a80d0626a88f X-Google-Attributes: gid1046a1,public X-Google-Thread: fe08e,6721a80d0626a88f X-Google-Attributes: gidfe08e,public From: Jordin Kare <jtk@s1.gov> Subject: Re: 24 hour analog Clock Wanted Date: 1995/07/27 Message-ID: <3v98c1$6l8@lll-winken.llnl.gov> X-Deja-AN: 106982337 distribution: world x-nntp-posting-host: lightrider.s1.gov approved: sci-space-tech@isu.isunet.edu references: <faludi-2407951945190001@f.faludi.com> to: sci-space-tech@uunet.uu.net delivery-date: Thu, 27 Jul 1995 17:23:43 -0700 x-xxmessage-id: <AC3D673DFB011F81@lightrider.s1.gov> organization: LLNL return-path: usenet@lll-winken.llnl.gov newsgroups: rec.collecting,sci.space.tech,alt.wanted,ba.wanted