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Path: utzoo!linus!decvax!harpo!eagle!mhuxi!houxm!ihnp4!inuxc!pur-ee!uiucdcs!uiuccsb!leimkuhl
From: leimkuhl@uiuccsb.UUCP
Newsgroups: net.followup
Subject: Re: Orphaned Response - (nf)
Message-ID: <3416@uiucdcs.UUCP>
Date: Mon, 24-Oct-83 23:52:02 EDT
Article-I.D.: uiucdcs.3416
Posted: Mon Oct 24 23:52:02 1983
Date-Received: Wed, 26-Oct-83 02:41:10 EDT
Lines: 27

#R:vortex:-16200:uiuccsb:3200016:000:980
uiuccsb!leimkuhl    Oct 24 11:39:00 1983



	If you have some hardware expertise, it shouldn't be too hard
	to construct a simple circuit to recognize the WWV time signal.
	The WWV signal consists of one tone per second with a high pitched
	beep at the minute.

	I remember seeing an article in an old '73 magazine on just such a
	reciever ("Build a Digital Time Standard using the WWV Signal" or 
	something like it).

	You could use an El Cheapo shortwave reciever (Panasonic RF085, etc.)
	and leave it set to 5, 10, or 15 Mhz; hook a small linear amp to the
	earphone jack and use an SCR to trigger on the WWV signal.  The
	only problem might be the fact that there is a speaking voice for
	part of the broadcast, so maybe you'll need a simple filter, too.

	Once your computer can recognize the incoming signal, it's really
	simple to right a piece of code to monitor this input and update
	a clock.  This approach would allow great flexibility in how the 
	clock is used.

	Ben Leimkuhler
	(uiucdcs!uiuccsb!leimkuhl)