Article View: sci.electronics
Article #9005Re: Sidereal Time Clock
From: Michael A. Covington
Date: Mon, 17 Dec 1990 01:16
Date: Mon, 17 Dec 1990 01:16
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Simple solution: Get yourself an automotive clock that already has a crystal in it. (You'll need one that uses a chip that has a 24-hour mode; might be tricky). Or get any set of chips that makes a 60-Hz line-operated clock. Use an MM5369N, which is a special chip that takes a 3.58-MHz color TV crystal and divides it down to 60 Hz. Get a crystal that's a wee bit faster, and you're done. JAN Crystals advertises in all the electronics magazines and a custom crystal costs less than $10.
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Path: arc1-ca.pugleaf.net!utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!usc!wuarchive!emory!athena.cs.uga.edu!mcovingt From: mcovingt@athena.cs.uga.edu ( Michael A. Covington) Newsgroups: sci.electronics Subject: Re: Sidereal Time Clock Message-ID: <1990Dec17.011623.15243@athena.cs.uga.edu> Date: 17 Dec 90 01:16:23 GMT References: <1990Dec12.214854.19076@swbatl.sbc.com> <10633@uhccux.uhcc.Hawaii.Edu> <1869@umriscc.isc.umr.edu> Distribution: sci.electronics Organization: University of Georgia, Athens Lines: 11