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[49.179.142.238]) by smtp.gmail.com with ESMTPSA id b17sm5641766pfi.61.2020.11.26.13.14.01 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Thu, 26 Nov 2020 13:14:01 -0800 (PST) Received: from james by esk with local (Exim 4.90_1) (envelope-from ) id 1kiOaT-0006VZ-48; Fri, 27 Nov 2020 08:13:57 +1100 From: James Cameron To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Thu, 26 Nov 2020 13:13:57 -0800 Subject: Re: [OT] Hyperikon Retrofit LED Tubes Without Ballast and fluorescent lamps and TV! Thread-Topic: [OT] Hyperikon Retrofit LED Tubes Without Ballast and fluorescent lamps and TV! Thread-Index: AdbEOoBBGoI1hkIITGqTowwgANZX3w== Message-ID: <20201126211357.GA22007@laptop.org> References: <20201125221458.06a56fd6300ec2bfca6379d4e10ab8d2.7f57746529.wbe@email27.godaddy.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 209.85.210.172 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.210.172; helo=mail-pf1-f172.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=/IFmuipDY+k2GIMesYM4GI0NDX8YleOp2zAY0yVA0ac=; b=x818t4AiuNr7Z85RaLjlrTk/sqdd/u1/ubGChcS9l/+WnsSMTJG+qX/X1Qcm50u9XU uGJQU8YSR/rbmaIvWKfJ4T2ktdSRpw8PFPhO4Cn/jaq6obJju9+KmddqXCWnG7DUA7Uu WatpI+ZcE04BNpvK8Bkxq/KSMw/neu/GBjkiEAE5hWDXhEE3enbsvvTAVP+GwQ6luTNv OBceA7WoNZ+DfyNI+PHQm3v8wSim+mvY+f4Zg/cE50JOvrqlSVpFfa91zmOjS3StdjvY riO5xfLM3zfrHRtKYUhOv0wtgASzosqXmWWuw7sakomKy4tTZgRIYXRUfDLfwSKZcIL1 8Arg== authentication-results: spf=pass (sender IP is 209.85.210.172) 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:a62:6586:0:b029:164:1cb9:8aff with SMTP id z128-20020a6265860000b02901641cb98affmr4207347pfb.64.1606425242377; Thu, 26 Nov 2020 13:14:02 -0800 (PST) x-topics: [OT] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 On Thu, Nov 26, 2020 at 12:27:10PM -0600, Martin McCormick wrote: > If one lowers the voltage below 100 volts on the tube, > the current starts to rise so no dimmers. You might try a leading- or trailing-edge dimmer rather than testing with variac. Variac will be giving you a sine wave with low amplitude. Leading- or trailing-edge dimmers give you a cut in an otherwise full amplitude sine wave. Some retail packaged LED lamps render this more properly. --=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 .