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, 4 Aug 2020 22:29:29 -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 0755DUfM004714; Wed, 5 Aug 2020 01:13:46 -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 0755DTjc004711 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Wed, 5 Aug 2020 01:13:29 -0400 Received: from w92exedge3.exchange.mit.edu (W92EXEDGE3.EXCHANGE.MIT.EDU [18.7.73.15]) by outgoing-exchange-5.mit.edu (8.14.7/8.12.4) with ESMTP id 0755DDCZ015354 for ; Wed, 5 Aug 2020 01:13:13 -0400 Received: from oc11exhyb6.exchange.mit.edu (18.9.1.111) by w92exedge3.exchange.mit.edu (18.7.73.15) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Wed, 5 Aug 2020 01:12:54 -0400 Received: from oc11exhyb2.exchange.mit.edu (18.9.1.98) by oc11exhyb6.exchange.mit.edu (18.9.1.111) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 5 Aug 2020 01:13:28 -0400 Received: from NAM12-MW2-obe.outbound.protection.outlook.com (104.47.66.43) by oc11exhyb2.exchange.mit.edu (18.9.1.98) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Wed, 5 Aug 2020 01:13:27 -0400 Received: from DM5PR07CA0134.namprd07.prod.outlook.com (2603:10b6:3:13e::24) by MWHPR01MB2574.prod.exchangelabs.com (2603:10b6:300:3f::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3239.20; Wed, 5 Aug 2020 05:13:25 +0000 Received: from DM3NAM03FT043.eop-NAM03.prod.protection.outlook.com (2603:10b6:3:13e:cafe::eb) by DM5PR07CA0134.outlook.office365.com (2603:10b6:3:13e::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3261.15 via Frontend Transport; Wed, 5 Aug 2020 05:13:24 +0000 Received: from mail-ed1-f53.google.com (209.85.208.53) by DM3NAM03FT043.mail.protection.outlook.com (10.152.83.227) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3239.20 via Frontend Transport; Wed, 5 Aug 2020 05:13:24 +0000 Received: by mail-ed1-f53.google.com with SMTP id i6so5907075edy.5 for ; Tue, 04 Aug 2020 22:13:24 -0700 (PDT) From: Sean Breheny To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Tue, 4 Aug 2020 22:13:11 -0700 Subject: Re: [EE] Wireless power transmission Thread-Topic: [EE] Wireless power transmission Thread-Index: AdZq6WSdCVZHxJnSRuWyxjlM6ybJNQ== Message-ID: 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 gmail.com designates 209.85.208.53 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.208.53; helo=mail-ed1-f53.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cornell.edu; s=g.20171207; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=BBQfa6FSb0lHxUNPxJ0vbgtIV6mOG0v2ZuSBwHgmE7o=; b=ajpNPsbZIBLQU5xG70QLRrb6eIcUZGoChc8BPfzzfMs8iMStk/cTTaQyDoCVHtWdie SwDuWxqD0LdhCNegwn60SprMAQlXY0N3lhCzHyzO1dQtRa9OZt4Le0ayDrIRERcoaWFF 8jzycbaZo7MT16rbvnYSedLvu3CLKN8KDDSye5eIK5pwXRKolqe/Wa38ipXCpdOxzfQ8 4oVgrAJlZH54wmbcqUEHy1wh8fH5uu8keMavZSyCSa86+bcTn95lHEoCl/hY1QxW1mZj 89N4btw5sliBHZoAQYAqL1uVu7jKL84xpl2edxkpPVD+F+AbwiZvPJt5Sm22/jirhLjb 48ug== authentication-results: spf=pass (sender IP is 209.85.208.53) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=cornell.edu; mit.edu; dmarc=pass action=none header.from=cornell.edu; 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:a50:9e4c:: with SMTP id z70mr1159957ede.384.1596604403485; Tue, 04 Aug 2020 22:13:23 -0700 (PDT) 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 My best guess is that this will end up as vaporware as all the others have. However, they do say that they are transmitting in an ISM band, using a narrow beam, and using metamaterials (maybe for lensing or to help the beam to go around obstacles). They also say that they have a laser-based safety detection barrier around the beam which shuts it down if anything enters the beam. I'm not sure how that will work with birds or rain/snow. Their name seems an odd choice. Emrod is an archaic English word for a hemorrhoid. On Wed, Aug 5, 2020, 12:20 AM Harold Hallikainen Details would be interesting to see. For low power "wireless charging," > I've read about inductive, RF, infrared, and ultrasonic. I don't think an= y > of these can transmit significant power for a significant distance withou= t > safety concerns. > > Harold > > > > > > https://emrod.energy/press-release-nz-start-up-launches-world-first-long-= range-wireless-power-transmission/ > > > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > > > > -- > FCC Rules Updated Daily at http://www.hallikainen.com > Not sent from an iPhone. > -- > 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 .