Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Sun, 6 Sep 2020 14:50:03 -0700 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 086Lex04010677; Sun, 6 Sep 2020 17:41:05 -0400 Received: from outgoing-exchange-7.mit.edu (OUTGOING-EXCHANGE-7.MIT.EDU [18.9.28.58]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 086Lev4W010669 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Sun, 6 Sep 2020 17:40:57 -0400 Received: from w92exedge3.exchange.mit.edu (W92EXEDGE3.EXCHANGE.MIT.EDU [18.7.73.15]) by outgoing-exchange-7.mit.edu (8.14.7/8.12.4) with ESMTP id 086Leuml027435 for ; Sun, 6 Sep 2020 17:40:56 -0400 Received: from oc11expo20.exchange.mit.edu (18.9.4.51) by w92exedge3.exchange.mit.edu (18.7.73.15) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Sun, 6 Sep 2020 17:40:25 -0400 Received: from oc11exhyb7.exchange.mit.edu (18.9.1.112) by oc11expo20.exchange.mit.edu (18.9.4.51) with Microsoft SMTP Server (TLS) id 15.0.1365.1; Sun, 6 Sep 2020 17:40:55 -0400 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (104.47.58.105) by oc11exhyb7.exchange.mit.edu (18.9.1.112) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Sun, 6 Sep 2020 17:40:55 -0400 Received: from DM5PR07CA0153.namprd07.prod.outlook.com (2603:10b6:3:ee::19) by BN8PR01MB5410.prod.exchangelabs.com (2603:10b6:408:b1::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3348.15; Sun, 6 Sep 2020 21:40:53 +0000 Received: from DM3NAM03FT040.eop-NAM03.prod.protection.outlook.com (2603:10b6:3:ee:cafe::8f) by DM5PR07CA0153.outlook.office365.com (2603:10b6:3:ee::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3348.15 via Frontend Transport; Sun, 6 Sep 2020 21:40:53 +0000 Received: from mail-pf1-f181.google.com (209.85.210.181) by DM3NAM03FT040.mail.protection.outlook.com (10.152.83.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3348.16 via Frontend Transport; Sun, 6 Sep 2020 21:40:53 +0000 Received: by mail-pf1-f181.google.com with SMTP id o20so7560628pfp.11 for ; Sun, 06 Sep 2020 14:40:53 -0700 (PDT) Received: from esk ([1.129.137.196]) by smtp.gmail.com with ESMTPSA id gb19sm10408310pjb.38.2020.09.06.14.40.50 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Sun, 06 Sep 2020 14:40:51 -0700 (PDT) Received: from james by esk with local (Exim 4.90_1) (envelope-from ) id 1kF2P0-00078A-75; Mon, 07 Sep 2020 07:40:46 +1000 From: James Cameron To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Sun, 6 Sep 2020 14:40:46 -0700 Subject: Re: [OT] Simple LiPo charging circuit Thread-Topic: [OT] Simple LiPo charging circuit Thread-Index: AdaEl61TMRGks9A6TwySNpMcu+7/vg== Message-ID: <20200906214046.GA25057@laptop.org> References: <20200904030306.GA30954@laptop.org> <7d0c7aa5-e974-9e82-015e-2e3501768c5d@gmail.com> <20200904060223.GC30954@laptop.org> <6e6855d8-1672-c321-c397-0459849c1da3@gmail.com> List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of laptop.org designates 209.85.210.181 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.210.181; helo=mail-pf1-f181.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=laptop-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=Kng7ZZklgtsJj6CShmB1yKBGfud4dpyTob3DlSrttG0=; b=0liqlNpQqoqyAzK0eidcz6QnnATTJ1Devj+WwAwYh1vj2b29HdYDyprFfAYCVEkZKb D2Ojn4n/GdWeTs84aROHHFgfbRNAxo7YQ+Z4ejP0ueQuVjS5eXIcOa3IH9PHYJrWxEWI PXKHxOIw+MdTgFYG6PFZvlQ7hZgrUdH/V5ZK82IeORHHRn8P0p8gOZrQmp9dUs1t/7jC mWNcoC5c78QN2jtnVNYLbc5iVfIdSAPrpDRUvlZEfCZh+nOu9YBvcJAcJFYvliUZh8N7 mcvAcP6+eu1bze3hFD7UJV6Ksnn03ONjtDVTJ5S+Bkyw+7NDQo0XdoD6NwEtFTHj7b9d Gvvg== authentication-results: spf=pass (sender IP is 209.85.210.181) smtp.mailfrom=laptop.org; mit.edu; dkim=pass (signature was verified) header.d=laptop-org.20150623.gappssmtp.com; mit.edu; dmarc=bestguesspass action=none header.from=laptop.org; user-agent: Mutt/1.9.4 (2018-02-28) errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:a62:1743:: with SMTP id 64mr18051984pfx.133.1599428451931; Sun, 06 Sep 2020 14:40:51 -0700 (PDT) x-topics: [OT] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Not on this particular product, but I've been able to reduce fast charge to slow charge by lowering the voltage. Simplest by adding a USB extension cable in series. --=20 James Cameron http://quozl.netrek.org/ --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .