From owner-freebsd-questions@FreeBSD.ORG Tue Apr 22 19:45:06 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5CE3137B401 for ; Tue, 22 Apr 2003 19:45:06 -0700 (PDT) Received: from grumpy.dyndns.org (user-24-214-34-52.knology.net [24.214.34.52]) by mx1.FreeBSD.org (Postfix) with ESMTP id 62F3943FAF for ; Tue, 22 Apr 2003 19:45:03 -0700 (PDT) (envelope-from dkelly@grumpy.dyndns.org) Received: from grumpy.dyndns.org (localhost [127.0.0.1]) by grumpy.dyndns.org (8.12.9/8.12.9) with ESMTP id h3N2g314016044; Tue, 22 Apr 2003 21:42:03 -0500 (CDT) (envelope-from dkelly@grumpy.dyndns.org) Received: by grumpy.dyndns.org (8.12.9/8.12.9/Submit) id h3N2g3wp016043; Tue, 22 Apr 2003 21:42:03 -0500 (CDT) From: David Kelly To: jfm@blueyonder.co.uk Date: Tue, 22 Apr 2003 21:42:00 -0500 User-Agent: KMail/1.5.1 References: <20030422184554.GA13432@grumpy.dyndns.org> <20030422193250.GA13774@grumpy.dyndns.org> <0cbbav01uff7p1r4cp0ipsrgqk59tdu592@4ax.com> In-Reply-To: <0cbbav01uff7p1r4cp0ipsrgqk59tdu592@4ax.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200304222142.00916.dkelly@HiWAAY.net> cc: questions@FreeBSD.ORG Subject: Re: Accurate time without a network connection? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Apr 2003 02:45:06 -0000 On Tuesday 22 April 2003 04:19 pm, John Murphy wrote: > David Kelly wrote: > >Surfing http://www.ntp.org/ has turned up a lot of information but > >little hardware. Of most interest was use of sound card connected to > >radio receiver for decoding the time signals. But that's a touch > > exotic for this application. Else I'd use the $20 LCD "atomic > > clock" I have on my wall, a $25 USB "web-cam", and some sort of > > OCR. > > I nearly fell off my chair laughing after reading that 'solution'! Its something I'm afraid I'm going to have to do it one day just for the silliness. "Take that Linux! See how superior FreeBSD is with such cool stuff!" The irony is how much less such a solution would cost than purpose built-for-computer radio clocks. Other variations would read the time off analog clock faces, and sundials. > There's a self build method at the following URL with notes for USA > users: http://www.buzzard.org.uk/jonathan/radioclock.html > I'm determined to make one (or two) myself soon. That's a really interesting URL. Had already turned up bits and pieces of what was mentioned there. Had fumbled around in the German-language-only http://www.hkw-elektronik.de/ site where many of the parts come from but lacked a North American distributor or any mention of prices. > I think Charles Swiger gave the answer which will suit you best. Its a solution we've already tried. A calibrated ntp.drift file helps a bunch but isn't good for weeks, months or years. This is Unix where simplicity and low maintenance designs are expected. It is not Windows where careers are made by keeping everyone dependent on the high priests. -- David Kelly N4HHE, dkelly@hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system.