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; Thu, 26 Nov 2020 13:42:37 -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 0AQLYUZf013525; Thu, 26 Nov 2020 16:34:41 -0500 Received: from outgoing-exchange-1.mit.edu (OUTGOING-EXCHANGE-1.MIT.EDU [18.9.28.15]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 0AQLYTT1013500 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Thu, 26 Nov 2020 16:34:29 -0500 Received: from w92exedge4.exchange.mit.edu (W92EXEDGE4.EXCHANGE.MIT.EDU [18.7.73.16]) by outgoing-exchange-1.mit.edu (8.14.7/8.12.4) with ESMTP id 0AQLYQPC026452 for ; Thu, 26 Nov 2020 16:34:29 -0500 Received: from w92expo10.exchange.mit.edu (18.7.74.64) by w92exedge4.exchange.mit.edu (18.7.73.16) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Thu, 26 Nov 2020 16:33:56 -0500 Received: from oc11exhyb1.exchange.mit.edu (18.9.1.60) by w92expo10.exchange.mit.edu (18.7.74.64) with Microsoft SMTP Server (TLS) id 15.0.1365.1; Thu, 26 Nov 2020 16:34:26 -0500 Received: from NAM02-BL2-obe.outbound.protection.outlook.com (104.47.38.54) by oc11exhyb1.exchange.mit.edu (18.9.1.60) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Thu, 26 Nov 2020 16:34:26 -0500 Received: from DM5PR07CA0034.namprd07.prod.outlook.com (2603:10b6:3:16::20) by DM5PR01MB3276.prod.exchangelabs.com (2603:10b6:3:fd::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3589.25; Thu, 26 Nov 2020 21:34:24 +0000 Received: from DM6NAM11FT015.eop-nam11.prod.protection.outlook.com (2603:10b6:3:16:cafe::e8) by DM5PR07CA0034.outlook.office365.com (2603:10b6:3:16::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3611.20 via Frontend Transport; Thu, 26 Nov 2020 21:34:24 +0000 Received: from mail-pg1-f181.google.com (209.85.215.181) by DM6NAM11FT015.mail.protection.outlook.com (10.13.172.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3611.25 via Frontend Transport; Thu, 26 Nov 2020 21:34:24 +0000 Received: by mail-pg1-f181.google.com with SMTP id 62so2592626pgg.12 for ; Thu, 26 Nov 2020 13:34:24 -0800 (PST) Received: from esk (pa49-179-142-238.pa.nsw.optusnet.com.au. [49.179.142.238]) by smtp.gmail.com with ESMTPSA id w18sm2623498pgf.30.2020.11.26.13.34.22 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Thu, 26 Nov 2020 13:34:22 -0800 (PST) Received: from james by esk with local (Exim 4.90_1) (envelope-from ) id 1kiOu9-0006jF-UC; Fri, 27 Nov 2020 08:34:17 +1100 From: James Cameron To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Thu, 26 Nov 2020 13:34:17 -0800 Subject: Re: [EE] Current Sense Project Thread-Topic: [EE] Current Sense Project Thread-Index: AdbEPQ8kOL1u0mgnTUW1cj91it8cjA== Message-ID: <20201126213417.GB22007@laptop.org> References: 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 209.85.215.181 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.215.181; helo=mail-pg1-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=Ja3sn331OTKxSTBu2VdQsk97Vt5LE9cZ8G5paZfRRU0=; b=eqM2nSiZ16QvdDxLMNL0YQCe5S/2O7hYJ8Emgrwu4RsWqG9511C4c+kG1FRwnf/KjJ ZUm2k6vdeCATkTHGGu0uVRRjRKRyQxzC1wdW7KleE6WQyhprrrp/I/AV78iWuU7rZ+Bm vrRMwJAKFuKJg93B2qi8Pj4Uw7WIz+SetripsQS1s6UE01Gmy54/IYoWbdLyAsX9vbwK bTeuJreUfzEBjMW6jjj7D0FGWZ58tBP7hRmuHK0YZx1237z6dSlA4sEuXoxFCaj663Zm 6bH+PBmp6eEQMdW/g9Z2X2eBEqV9Yymf/Lfx4/J9uFGUkHLSSU2oVsNF3xoNxefBiYqO ZUxw== authentication-results: spf=pass (sender IP is 209.85.215.181) 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:a05:6a00:16c9:b029:18a:e20e:4bfd with SMTP id l9-20020a056a0016c9b029018ae20e4bfdmr4087487pfc.49.1606426463415; Thu, 26 Nov 2020 13:34:23 -0800 (PST) x-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sounds good. For one-offs, my habit is to optimise my time rather than components. I'd steal power from the heater supply, wired to a 5V SMPS if stolen at AC line voltage, or some other converter if stolen from a low voltage, and run an esp8266 or esp32 module with an optional ds18b20. On my main server I'd script something that would ping the node at 8pm and report if it was missing. Or it could be an esp8266 at bedside. Another way is to store the block heater power supply next to your bed. Repeated inconvenience of forgetting gradually reinforces remembering. -- Amazing the problems you wintering folks have to put up with! Our first for the season extreme heatwave forecast this weekend, http://www.bom.gov.au/australia/heatwave/ .... where "extreme" means failure of infrastructure; liquid roads, flat tyres, engines overheating, transmission line protection trips, babies kept indoors, dead pets, rains of dead birds, .... it is time to put the candles and medications in the fridge, not leave the butter out, and watch the kangaroos shelter under trees. .... still pondering best way to put aluminium foil on windows. --=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 .