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; Wed, 29 Apr 2020 08:50:08 -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 03TFd2Pg019412; Wed, 29 Apr 2020 11:39:21 -0400 Received: from outgoing-exchange-5.mit.edu (OUTGOING-EXCHANGE-5.MIT.EDU [18.9.28.59]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 03TFd1BM019407 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Wed, 29 Apr 2020 11:39:02 -0400 Received: from oc11exedge1.exchange.mit.edu (OC11EXEDGE1.EXCHANGE.MIT.EDU [18.9.3.17]) by outgoing-exchange-5.mit.edu (8.14.7/8.12.4) with ESMTP id 03TFcCZp021181 for ; Wed, 29 Apr 2020 11:39:07 -0400 Received: from w92expo6.exchange.mit.edu (18.7.74.60) by oc11exedge1.exchange.mit.edu (18.9.3.17) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Wed, 29 Apr 2020 11:38:10 -0400 Received: from oc11exhyb1.exchange.mit.edu (18.9.1.60) by w92expo6.exchange.mit.edu (18.7.74.60) with Microsoft SMTP Server (TLS) id 15.0.1365.1; Wed, 29 Apr 2020 11:38:37 -0400 Received: from NAM02-SN1-obe.outbound.protection.outlook.com (104.47.36.56) by oc11exhyb1.exchange.mit.edu (18.9.1.60) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Wed, 29 Apr 2020 11:38:36 -0400 Received: from MWHPR14CA0025.namprd14.prod.outlook.com (2603:10b6:300:12b::11) by BYAPR01MB3942.prod.exchangelabs.com (2603:10b6:a02:8c::25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2937.22; Wed, 29 Apr 2020 15:38:33 +0000 Received: from CO1NAM03FT011.eop-NAM03.prod.protection.outlook.com (2603:10b6:300:12b:cafe::d) by MWHPR14CA0025.outlook.office365.com (2603:10b6:300:12b::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2958.20 via Frontend Transport; Wed, 29 Apr 2020 15:38:33 +0000 Received: from smtp.int.clayton.edu (168.28.240.17) by CO1NAM03FT011.mail.protection.outlook.com (10.152.80.87) with Microsoft SMTP Server id 15.20.2921.25 via Frontend Transport; Wed, 29 Apr 2020 15:38:32 +0000 Received: from kahuna.clayton.edu (kahuna.clayton.edu [168.28.245.116]) by smtp.int.clayton.edu (Postfix) with ESMTP id 92BA3C0079 for ; Wed, 29 Apr 2020 11:38:29 -0400 (EDT) Received: by kahuna.clayton.edu (Postfix, from userid 1606) id 8008D11800B4; Wed, 29 Apr 2020 11:38:29 -0400 (EDT) From: Byron Jeff To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Wed, 29 Apr 2020 08:38:29 -0700 Subject: Re: [EE] Voltage regulator with high input voltage Thread-Topic: [EE] Voltage regulator with high input voltage Thread-Index: AdYePdwuz3WBU6LJQ2qskz9QkGNCgg== Message-ID: <20200429153829.GA26669@clayton.edu> References: <20200428194448.GA6891@clayton.edu> 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 clayton.edu designates 168.28.240.17 as permitted sender) receiver=protection.outlook.com; client-ip=168.28.240.17; helo=smtp.int.clayton.edu; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=clayton.edu; s=csuk; t=1588174709; bh=LsCZNs6dseyHhz6qyJrkrOBM9uhPV49ChNe5SO64Fak=; h=Date:From:To:Subject:References:In-Reply-To:From; b=g6bvLbFbmNzby6iAgzmABW4wwkHgunZUoVlMV8PXmFidYBmk+FVREesNwcrpmLPnA ZaIIebpr0Yqe6iGM9cFqOZs0U2bZBf9MY904IFZ7g+P91+mPcJ5tBre9sOKRxN5g/F e4b2dJLeexv2ayb3fblTrki881GAKlRqMxotauq4= authentication-results: spf=pass (sender IP is 168.28.240.17) smtp.mailfrom=clayton.edu; mit.edu; dkim=pass (signature was verified) header.d=clayton.edu;mit.edu; dmarc=pass action=none header.from=clayton.edu;compauth=pass reason=100 user-agent: Mutt/1.5.24 (2015-08-30) 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-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 No idea. That E-mail is buried now. My E-mail system has your message at the top. So that's what I replied to. BAJ On Wed, Apr 29, 2020 at 03:49:18PM +0100, David C Brown wrote: > How is that superior to the solution that Denny proposed in the first rep= ly? >=20 > __________________________________________ > David C Brown > 43 Bings Road > Whaley Bridge > High Peak Phone: 01663 733236 > Derbyshire eMail: dcb.home@gmail.com > SK23 7ND web: www.bings-knowle.co.uk/dcb > >=20 >=20 >=20 > *Sent from my etch-a-sketch* >=20 >=20 > On Tue, 28 Apr 2020 at 20:47, Byron Jeff wrote: >=20 > > Personally I wouldn't spend any effort on this. Just buy something like= a > > uxcell golf cart power converter. It's overkill. But it solves the prob= lem > > in 5 seconds flat. It's waterproof too. > > > > BAJ > > > > On Mon, Apr 27, 2020 at 06:24:16PM +0100, David C Brown wrote: > > > I am designing a current monitor for my e-bike. Using an INA169 hi s= ide > > > current senor into a mid range PIC with a two digit LED display. > > > > > > Problem is getting the 5 volts for the PIC from the e bike battery wh= ich > > is > > > nominally 36v but can rise to over 40 volts when fully charged. Most > > small > > > linear regulators seem to be rated at 36v.. > > > > > > Current would be a couple of milliamps with the display off (most of = the > > > time). Nearer 100 with the display on.. > > > > > > Any suggestions > > > > > > > > > __________________________________________ > > > David C Brown > > > 43 Bings Road > > > Whaley Bridge > > > High Peak Phone: 01663 733236 > > > Derbyshire eMail: dcb.home@gmail.com > > > SK23 7ND web: www.bings-knowle.co.uk/dcb > > > > > > > > > > > > > > > *Sent from my etch-a-sketch* > > > -- > > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > > View/change your membership options at > > > http://mailman.mit.edu/mailman/listinfo/piclist > > > > -- > > Byron A. Jeff > > Associate Professor: Department of Computer Science and Information > > Technology > > College of Information and Mathematical Sciences > > Clayton State University > > http://faculty.clayton.edu/bjeff > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > > --=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 --=20 Byron A. Jeff Associate Professor: Department of Computer Science and Information Technol= ogy College of Information and Mathematical Sciences Clayton State University http://faculty.clayton.edu/bjeff --=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 .