From owner-freebsd-questions@FreeBSD.ORG Tue May 15 04:17:59 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id DCD7C16A40A for ; Tue, 15 May 2007 04:17:59 +0000 (UTC) (envelope-from wizlayer@gmail.com) Received: from wr-out-0506.google.com (wr-out-0506.google.com [64.233.184.235]) by mx1.freebsd.org (Postfix) with ESMTP id 91F9613C4BA for ; Tue, 15 May 2007 04:17:59 +0000 (UTC) (envelope-from wizlayer@gmail.com) Received: by wr-out-0506.google.com with SMTP id 70so1876550wra for ; Mon, 14 May 2007 21:17:59 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:from:reply-to:to:subject:date:user-agent:references:in-reply-to:cc:x-copyright-notice:x-copyright-info:mime-version:content-type:content-transfer-encoding:message-id; b=Wkjsnn4ge4Zkam3Tmwl/zR3/JspU74LsP6QN1fRt2H4D259yTnWZ2a2tnGbJbiTQteFQs1gwSST4+6uR8pSOMTnC37UUsTP6M+qxeOXtLGi+vK6A3XAwNr02emhh1qP9qa/mIzXkNEP+s1lIogwb6l/XDt0YT3XMajENxCU/QoE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:from:reply-to:to:subject:date:user-agent:references:in-reply-to:cc:x-copyright-notice:x-copyright-info:mime-version:content-type:content-transfer-encoding:message-id; b=q77iqJt6vKOWlphlMv2gPkdhiPN9ZVAVkml3u1+0aDYMdRZ7+auS9Bdd11pa5mRKs1SSp4Ju9De3wEupHf2YUj3l/hWYZSBlaenkqAwTzF6JXtN5QUHgN0umEzNAFz8kj3IyeRxifx+DDwoOKp648R2J5HxQAEbf9xj2Nn7ofGk= Received: by 10.90.95.11 with SMTP id s11mr5686419agb.1179202678841; Mon, 14 May 2007 21:17:58 -0700 (PDT) Received: from ?10.2.252.239? ( [65.208.79.2]) by mx.google.com with ESMTP id 1sm15980491agb.2007.05.14.21.17.56; Mon, 14 May 2007 21:17:58 -0700 (PDT) From: WizLayer To: jekillen Date: Tue, 15 May 2007 00:16:34 -0500 User-Agent: KMail/1.9.6 References: <23042ea705a53aea5d36bb86a06d3b4c@prodigy.net> <200705132113.15443.wizlayer@gmail.com> In-Reply-To: X-Copyright-Notice: 2007 Michael C. Hauber X-Copyright-Info: This transmission is copyrighted and may not be stored, printed, forwarded, or distributed by any means without the author's written consent. MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart3652408.oyKeYqPATp"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200705150017.14949.wizlayer@gmail.com> Cc: "FreeBSD, Questions" Subject: Re: Auto shutdown/restart software for FreeBSD? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: wizlayer@gmail.com List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 May 2007 04:17:59 -0000 --nextPart3652408.oyKeYqPATp Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Monday 14 May 2007 08:27:48 pm you wrote: > On May 13, 2007, at 7:13 PM, WizLayer wrote: > > On Sunday 13 May 2007 07:17:14 pm Aftab Jahan Subedar wrote: > >> Would it recharge the battery fully after discharge? I dont think so. > >> So you got to recharge the external battery EXTERNALLY after power > >> failure. > > > > What's wrong with that? Trickle-charge the battery and ride the > > computers > > from the battery at the same time... That's an uninterrupted power > > supply. > > A voltage regulator, converter, and a few filters will give you a > > clean, > > constant supply. It will last longer, and it's a lot cheaper in > > comparison. > > > > Actually, this is a project of mine that's been on the back burner for > > years > > now. I'd like to add a network interface for remote controls, some > > health > > checking, and test modes, but would have to incorporate an embedded > > processor > > (serial port and/or USB interfaces are just as possible). > > > > Being that I've never messed with such, any suggestions as far as a > > good > > processor to start with? It doesn't necessarily have to be a > > processor that > > will do the whole kit-n-kaboodle. Right now, I'm just looking for > > something > > I can learn the basics with. > > > > I know it's not a BSD-related question, but I figured I'd ask anyway. > > > > Thanks > > > > WizLayer > > This is another approach that seems like it would be practical: > Use deep cycle car batteries, trickle charge with solar panels. > If a desktop computer can run on square wave generated by > dc/ac converter, use that as a power backup system, It would > have to have some kind of switching system to detect main > power drop and switch to the backup system. > Perhaps someone would be willing to, with engineering expertise > put together servers that would work on laptop batteries, like a > laptop. I do have one machine that has Yellow Dog linux (Mac > Powerbook 3400c) that runs 24/7 as my backup DNS server. > JK Why settle for a square wave? It's not hard to clean that up, and besides.= =2E. =20 Wouldn't that bring mayhem and havoc on a scanner (ie, I'm pretty sure that= =20 you your screen would do very unhappy things)? LCD screen? don't know. (o= r=20 a system's power supply over long term? hmmm) As far as the type of batteries, deep cycle marine batteries, whatever. It= =20 doesn't really matter except to say that some types can be fully discharged= =20 and some would be ruined on a full discharge. The health and monitoring=20 portion of the UPS would have to be designed with those limits in mind (and= ,=20 hey... That could be part of the embedded mprocessors job, too... more=20 options). Switching power from one source to another is something that I've not had a= =20 lot of luck with, esp with sensitive stuff like a computer's power supply= =20 (touchy). On the other hand clean, dc power in a parallel circuit is as=20 simple as it gets. Edison had a good idea after all. =20 Look at the battery as your constant source, and work away from that. Your= =20 secondary source merely compliments the battery. So long as you use=20 regulators for your "other sources", it will stay "Clean by default." :) As far as switching power sources from regular charger to something like so= lar=20 panels, same concept... Don't switch from-to anything. Keep it constantly= =20 hooked up in parallel with the battery. =20 Some simple logics could perform circuits acts for the solar panels ("if su= n=20 is good and elec_co's bad , then close..." however you want to hack it.) = =20 Same for dis/associating the charger.=20 I just need someone to point me in the right direction as far as embedded=20 mprocessors. I've googled it, and found a few hobby kits, but I'd rather=20 hear it from someone who deals with stuff like this and can suggest a "star= t=20 here." I hate jumping into something only to have to unlearn in order to=20 learn it right.=20 WizLayer PS When I finally get this finished, I'm going to find some way of modifyi= ng=20 the BSD license to apply it and release the whole thing to the public. One= =20 would only have to buy the parts, program, and assemble the thing... Why? = =20 Because UPS prices are a rip-off and some jerk told me I couldn't. :) =2D-=20 Life is better with a BSD. =46or more info, www.bsd.org. --nextPart3652408.oyKeYqPATp Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQBGSUIz2y0gbVRgU1ERAgAFAKDHDWmUA42FWJsUctN+0tlqyqgiDACgtHag yFqlIEuqz1WCSPgpL43Tl/0= =ASiq -----END PGP SIGNATURE----- --nextPart3652408.oyKeYqPATp--