Return-Path: X-Spam-DCC: paranoid 1290; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00 autolearn=ham version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id s8U9i8Zh010902 for ; Tue, 30 Sep 2014 11:44:08 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1XYtsa-0003I1-3V for rs_out_1@blacksheep.org; Tue, 30 Sep 2014 10:37:56 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1XYtsZ-0003Hr-OI for rsgb_lf_group@blacksheep.org; Tue, 30 Sep 2014 10:37:55 +0100 Received: from st11p06mm-asmtp001.mac.com ([17.172.124.249]) by relay1.thorcom.net with esmtps (TLSv1:RC4-MD5:128) (Exim 4.82) (envelope-from ) id 1XYtsX-0000Wp-RA for rsgb_lf_group@blacksheep.org; Tue, 30 Sep 2014 10:37:54 +0100 Received: from [10.251.38.127] (unknown [145.78.24.4]) by st11p06mm-asmtp001.mac.com (Oracle Communications Messaging Server 7u4-27.10(7.0.4.27.9) 64bit (built Jun 6 2014)) with ESMTPSA id <0NCP004XPK30S500@st11p06mm-asmtp001.mac.com> for rsgb_lf_group@blacksheep.org; Tue, 30 Sep 2014 09:37:50 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.12.52,1.0.28,0.0.0000 definitions=2014-09-30_05:2014-09-29,2014-09-30,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1402240000 definitions=main-1409300103 References: <4B47B680CCBD46B69C3FB841C5A3081F@AGB> <53FE3567.8020208@gmail.com> <009701cfc23e$b4bdc410$1e394c30$@simnet.is> <53FE51E1.3060303@gmail.com> <53FF23E8.10907@gmail.com> <5400127E.3000808@abelian.org> <540049C6.9050006@gmail.com> <143F048B24A040058ED88A15AE211979@MichaelSappPC> <5402465F.1050101@gmail.com> <5410AC37.6050506@gmail.com> <873BC5A1589F4B79B2142360B52A648F@White> <5414A1CD.6060608@gmail.com> <5425EDF3.9090806@gmail.com> From: Spring Global X-Mailer: iPad Mail (11D257) In-reply-to: <5425EDF3.9090806@gmail.com> Message-id: <56C07B38-5EEE-40E5-9C6E-F401AD12914D@me.com> Date: Tue, 30 Sep 2014 11:37:47 +0200 To: "rsgb_lf_group@blacksheep.org" MIME-version: 1.0 (1.0) X-Scan-Signature: 7001055fa59a9c23b9831ea6d317a074 Subject: Re: LF: OT, Remote site, garden progress, Solar battery charger Content-type: text/plain; charset=us-ascii 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by paranoid.lipkowski.org id s8U9i8Zh010902 Status: O X-Status: X-Keywords: X-UID: 549 Interesting, will need to build something like this shortly, need to get parts first PE3ES > On 27 sep. 2014, at 00:51, DK7FC <73dk7fc@googlemail.com> wrote: > > Hi all, > > Since today, my solar powered battery in the garden is charged by this solar battery charger, https://dl.dropboxusercontent.com/u/19882028/20140927_004153.jpg > It took some time until i found the circuit that suits my requirements. The losses are very low! The supply current of the circuit is just 40 uA!. The circuit is a comparator design which generates no QRM during ON and OFF times. The switching transients are relatively slow (not like in usual switch mode supplies). The hysteresis causes a switch-off voltage of 13.9V and a switch-on voltage of 13.3V. The high current diode which is a very low forward voltage drop is taken from an old SMPS... > > Just in case someone want to play with similar stuff and likes to have some ideas... > > 73, Stefan/DK7FC > > PS: Yes yes yes, of course the may be similar circuits in the web and someone has done it before. But it wasn't the goal to do something the first time, as usual :-) > >