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; Sat, 15 Feb 2020 05:09:52 -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 01FCsvcA030153; Sat, 15 Feb 2020 08:00:19 -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 01FCsueF030148 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Sat, 15 Feb 2020 07:54:56 -0500 Received: from w92exedge4.exchange.mit.edu (W92EXEDGE4.EXCHANGE.MIT.EDU [18.7.73.16]) by outgoing-exchange-7.mit.edu (8.14.7/8.12.4) with ESMTP id 01FCsimx002026 for ; Sat, 15 Feb 2020 07:54:44 -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; Sat, 15 Feb 2020 07:52:42 -0500 Received: from oc11exhyb8.exchange.mit.edu (18.9.1.113) by w92expo10.exchange.mit.edu (18.7.74.64) with Microsoft SMTP Server (TLS) id 15.0.1365.1; Sat, 15 Feb 2020 07:54:55 -0500 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (104.47.58.108) by oc11exhyb8.exchange.mit.edu (18.9.1.113) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Sat, 15 Feb 2020 07:54:55 -0500 Received: from SN2PR01CA0038.prod.exchangelabs.com (2603:10b6:804:2::48) by SN6PR01MB5294.prod.exchangelabs.com (2603:10b6:805:db::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2729.25; Sat, 15 Feb 2020 12:54:54 +0000 Received: from DM3NAM03FT065.eop-NAM03.prod.protection.outlook.com (2a01:111:f400:7e49::206) by SN2PR01CA0038.outlook.office365.com (2603:10b6:804:2::48) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2729.22 via Frontend Transport; Sat, 15 Feb 2020 12:54:54 +0000 Received: from omta013.useast.a.cloudfilter.net (34.195.253.204) by DM3NAM03FT065.mail.protection.outlook.com (10.152.82.254) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2729.22 via Frontend Transport; Sat, 15 Feb 2020 12:54:53 +0000 Received: from cxr.smtp.a.cloudfilter.net ([10.0.17.211]) by cmsmtp with ESMTP id 2wHbj9rfQF49R2wyDjz1gH; Sat, 15 Feb 2020 12:54:53 +0000 Received: from [192.168.1.100] ([70.161.213.14]) by cmsmtp with ESMTPSA id 2wyAjveDzBb622wyCjUXCq; Sat, 15 Feb 2020 12:54:53 +0000 From: Richard To: "piclist@mit.edu" Sender: "piclist-bounces@mit.edu" Date: Sat, 15 Feb 2020 04:54:49 -0800 Subject: Re: [EE]:: RADAR light bulbs Thread-Topic: [EE]:: RADAR light bulbs Thread-Index: AdXkATZvJ0jJDW+sTnaZYIjJTJolRA== Message-ID: References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US Content-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 cox.net designates 34.195.253.204 as permitted sender) receiver=protection.outlook.com; client-ip=34.195.253.204; helo=omta013.useast.a.cloudfilter.net; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mitprod.onmicrosoft.com; s=selector2-mitprod-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Pl5uMXVjSxC2ikvwzdZx+GfYil4kagAdDKhXjh/EB+4=; b=LADLBhdiSxYHcWidLsBI5BBLqNeHhdf6wjLiVnQKcA+o8rNW02cblHvqvVDqVomaLb8PRRHcLcUbylO4jYP5OK/2K0qQHzt163XXOFeQXYGOlFMyxWsTWb9ymCxS/ggQ2UYMEQ7ry8JsNCztWQqrDSvOt6uZU5itbGoVyL35+dI= authentication-results: spf=pass (sender IP is 34.195.253.204) smtp.mailfrom=cox.net; mit.edu; dkim=none (message not signed) header.d=none;mit.edu; dmarc=pass action=none header.from=cox.net;compauth=pass reason=100 user-agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 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-authority-analysis: v=2.3 cv=LvnsNUVc c=1 sm=1 tr=0 a=EsYogB0/4v/JJ3ZEZ5qKEA==:117 a=EsYogB0/4v/JJ3ZEZ5qKEA==:17 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=IkcTkHD0fZMA:10 a=w333UbiOAAAA:8 a=1XWaLZrsAAAA:8 a=xonSqBoCh_aXfITap8EA:9 a=QEXdDO2ut3YA:10 a=vvtygCJLwSALrxZfnqrF:22 x-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 On 2/14/2020 6:45 AM, RussellMc wrote: > 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 Russell, Thank you for sharing this information and idea trove, but codrey.com is=20 yet another site in which I will get lost for some=20 as-yet-to-be-determined period of time. --=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 .