Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md04.r1000.mx.aol.com (Internet Inbound) with ESMTP id C7EA3380000E5; Fri, 23 Dec 2011 12:33:23 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Re8FP-0003xk-B3 for rs_out_1@blacksheep.org; Fri, 23 Dec 2011 16:45:31 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Re8FO-0003xb-Vs for rsgb_lf_group@blacksheep.org; Fri, 23 Dec 2011 16:45:30 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Re8FN-00027v-ES for rsgb_lf_group@blacksheep.org; Fri, 23 Dec 2011 16:45:30 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id pBNGjSK9031068 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 23 Dec 2011 17:45:28 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id pBNGjSHj019301 for ; Fri, 23 Dec 2011 17:45:28 +0100 Message-ID: <4EF4AFB8.1010501@iup.uni-heidelberg.de> Date: Fri, 23 Dec 2011 17:43:36 +0100 From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4EF3689B.1030902@iup.uni-heidelberg.de> <805AC05E834C4F7DA019C36A04013479@JimPC> <4EF49A75.7040405@iup.uni-heidelberg.de> In-Reply-To: <4EF49A75.7040405@iup.uni-heidelberg.de> X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id pBNGjSK9031068 X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Re: Automatic Variometer adjustment at DK7FC Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: quoted-printable X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:429906112:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60584ef4bb630576 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Am 23.12.2011 16:12, schrieb Stefan Sch=E4fer: > [...]But what i want to do is to make the resistor smaller and reduce=20 > the output voltage a bit, making the behaviour of the source come=20 > closer to an ideal voltage source instead of a current source. I will=20 > simply add a 7808 or 7806 and a 1000uF cap in front of the 7667.[...] A series configuration of anti-parallel switched diodes (e.g. 1N4007) in=20 series to the engine may help as well :-) 73, Stefan