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; Fri, 14 Feb 2020 04:00:52 -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 01EBkcAb012229; Fri, 14 Feb 2020 06:51:34 -0500 Received: from outgoing-exchange-7.mit.edu (OUTGOING-EXCHANGE-7.MIT.EDU [18.9.28.58]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 01EBkaZu012196 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 14 Feb 2020 06:46:37 -0500 Received: from w92exedge3.exchange.mit.edu (W92EXEDGE3.EXCHANGE.MIT.EDU [18.7.73.15]) by outgoing-exchange-7.mit.edu (8.14.7/8.12.4) with ESMTP id 01EBkPEI024697 for ; Fri, 14 Feb 2020 06:46:25 -0500 Received: from oc11expo6.exchange.mit.edu (18.9.4.11) by w92exedge3.exchange.mit.edu (18.7.73.15) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Fri, 14 Feb 2020 06:46:32 -0500 Received: from oc11exhyb7.exchange.mit.edu (18.9.1.112) by oc11expo6.exchange.mit.edu (18.9.4.11) with Microsoft SMTP Server (TLS) id 15.0.1365.1; Fri, 14 Feb 2020 06:46:35 -0500 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (104.47.58.109) by oc11exhyb7.exchange.mit.edu (18.9.1.112) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Fri, 14 Feb 2020 06:46:35 -0500 Received: from BYAPR01CA0043.prod.exchangelabs.com (2603:10b6:a03:94::20) by BYAPR01MB4135.prod.exchangelabs.com (2603:10b6:a03:12::30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2707.28; Fri, 14 Feb 2020 11:46:34 +0000 Received: from CO1NAM03FT012.eop-NAM03.prod.protection.outlook.com (2a01:111:f400:7e48::206) by BYAPR01CA0043.outlook.office365.com (2603:10b6:a03:94::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2729.22 via Frontend Transport; Fri, 14 Feb 2020 11:46:34 +0000 Received: from mail-ed1-f53.google.com (209.85.208.53) by CO1NAM03FT012.mail.protection.outlook.com (10.152.80.99) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2729.22 via Frontend Transport; Fri, 14 Feb 2020 11:46:34 +0000 Received: by mail-ed1-f53.google.com with SMTP id r21so10888677edq.0 for ; Fri, 14 Feb 2020 03:46:34 -0800 (PST) From: RussellMc To: Microcontroller discussion list - Public. CC: Dennis Sanner , ApptechNZ , "hanimamiruthm@gmail.com" , "ken@elecsyn.com" Sender: "piclist-bounces@mit.edu" Date: Fri, 14 Feb 2020 03:45:55 -0800 Subject: [EE]:: RADAR light bulbs Thread-Topic: [EE]:: RADAR light bulbs Thread-Index: AdXjLmg/9OJtlAwPR125i2z6LHC1iw== Message-ID: List-Help: List-Subscribe: , List-Unsubscribe: , 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: TempError 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=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to:cc; bh=OhFv6FVA07VGXpzx/JwucGgihkMjl8yZpLAXbQsfzWA=; b=Jpzg/9bBkjlfu0vaz/YTX8oU5yq4cyY7jxkBkKbY1yId8DH6g4lfuTMLrt5AyKCWHD Is4Ip6CGgCmpMTGR4dhvG7rv3mPXIP2awX1LgA7q4SMeFQcJxgR1zplJEsm7kJ359XJN gS9IuvZ3fwi+b5d/69DcL9zqdQ9scnftRCEGRfWP1TIfGuNFLUWNVdwOd0RoDdxpg8Gn 5sWfWit4U2BmcnR+6rp7LmEjmeFiZ/wDfZuyxn8BPyKADkAvK2zl38uX9GVHBkuQvi3U ac5e8ZJXM9BJGTuGleKdjnvL3eybXmEcRrliGkLBkvwPNCz6tnEY3cs8wSGeytBUZkjj OKHQ== authentication-results: spf=pass (sender IP is 209.85.208.53) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=gmail.com;mit.edu; dmarc=pass action=none header.from=gmail.com;compauth=pass reason=100 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:aa7:d844:: with SMTP id f4mr2289430eds.206.1581680792339; Fri, 14 Feb 2020 03:46:32 -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 Mentions PIR in passing then gives a good cross section intro to DIY and off the shelf RADAR triggered bulbs. https://www.codrey.com/electronic-circuits/radar-light-bulbs-random-views/ Doppler RADAR units from eg Aliexpress cost a few $. The excessively keen could make them for well under a dollar. How one version (may) work. https://patents.google.com/patent/EP3091605A1/en --=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 .