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; Tue, 9 Nov 2021 03:38:07 -0800 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 1A9BSA00018773; Tue, 9 Nov 2021 06:28:52 -0500 Received: from outgoing-exchange-3.mit.edu (OUTGOING-EXCHANGE-3.MIT.EDU [18.9.28.13]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 1A9BS8PA018770 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Tue, 9 Nov 2021 06:28:08 -0500 Received: from oc11exedge2.exchange.mit.edu (OC11EXEDGE2.EXCHANGE.MIT.EDU [18.9.3.18]) by outgoing-exchange-3.mit.edu (8.14.7/8.12.4) with ESMTP id 1A9BS4kP019377 for ; Tue, 9 Nov 2021 06:28:07 -0500 Received: from oc11exhyb8.exchange.mit.edu (18.9.1.113) by oc11exedge2.exchange.mit.edu (18.9.3.18) with Microsoft SMTP Server (TLS) id 15.0.1497.24; Tue, 9 Nov 2021 06:27:33 -0500 Received: from w92exhyb8.exchange.mit.edu (18.7.71.113) by oc11exhyb8.exchange.mit.edu (18.9.1.113) with Microsoft SMTP Server (TLS) id 15.0.1497.24; Tue, 9 Nov 2021 06:28:05 -0500 Received: from NAM11-DM6-obe.outbound.protection.outlook.com (104.47.57.169) by w92exhyb8.exchange.mit.edu (18.7.71.113) with Microsoft SMTP Server (TLS) id 15.0.1497.24 via Frontend Transport; Tue, 9 Nov 2021 06:28:05 -0500 Received: from CO2PR04CA0154.namprd04.prod.outlook.com (2603:10b6:104::32) by DM5PR01MB2762.prod.exchangelabs.com (2603:10b6:3:f4::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4690.15; Tue, 9 Nov 2021 11:28:03 +0000 Received: from CO1NAM11FT037.eop-nam11.prod.protection.outlook.com (2603:10b6:104:0:cafe::e4) by CO2PR04CA0154.outlook.office365.com (2603:10b6:104::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4669.15 via Frontend Transport; Tue, 9 Nov 2021 11:28:03 +0000 Received: from mail-wr1-f51.google.com (209.85.221.51) by CO1NAM11FT037.mail.protection.outlook.com (10.13.174.91) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4669.10 via Frontend Transport; Tue, 9 Nov 2021 11:28:03 +0000 Received: by mail-wr1-f51.google.com with SMTP id u1so32367352wru.13 for ; Tue, 09 Nov 2021 03:28:03 -0800 (PST) From: RussellMc To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Tue, 9 Nov 2021 03:27:23 -0800 Subject: Re: [EE]: Sony LED TV repair update KD-60X6700E. 50 backlight LEDs in series. Thread-Topic: [EE]: Sony LED TV repair update KD-60X6700E. 50 backlight LEDs in series. Thread-Index: AdfVXkSEkLw67bpIQl+TFutifFogDw== Message-ID: References: <71580300-6182-f64c-f6fc-fb86d625bc03@audiovisualdevices.com.au> 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 gmail.com designates 209.85.221.51 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.221.51; helo=mail-wr1-f51.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=WESiHvoJkeI3Srdcj70R1NyJBHkQy2U3rj2cSOmSiQE=; b=OiLRP8vzvtRVThhB7W5WsDvp4wnR4Evgom/g1KnQzzNFFffJTBF10KHbY597AsfSL6 TdmiIAW6yXQe4qI0WY1hY5EpPTlfkhtSoXnk1aMYuxIKM0lCSktJtu+3fyyts59v1VXF j8YWREDP8wxn7PjK41Il12ODUGf6lh3EMP1mgOt2Td3f1TczJOtU7rMZJApiACJN8HQL tBmLvAxTJEEu0mn0lXMr1DIkUy+EmUciqeXiS5yZ3REYQkZYT+LZ/1V0RGVOKUtb64jD TVbf9Y3IdZ5VlPAVkjffxVqaumVJGVql9Pxz06FXqO/WYymKKc+lcFOcfBUuFpnJPcG6 0fQg== authentication-results: spf=pass (sender IP is 209.85.221.51) smtp.mailfrom=gmail.com; dkim=pass (signature was verified) header.d=gmail.com;dmarc=pass action=none header.from=gmail.com; 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:a05:6000:1141:: with SMTP id d1mr8304811wrx.342.1636457281370; Tue, 09 Nov 2021 03:28:01 -0800 (PST) x-topics: [EE] x-content-filtered-by: Mailman/MimeDel 2.1.6 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 On Tue, 9 Nov 2021 at 23:50, David Robertson wrote: > Tangentially related, I recently came across the NUD4700 from onsemi: > > The NUD4700 is an electronic shunt which provides a current bypass in the > case of a single LED going into open circuit. > A suitable wattage 3Vx zener would do most of that. Russell --=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 .