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; Wed, 3 Feb 2021 18:48:47 -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 1142d0lS021919; Wed, 3 Feb 2021 21:39:46 -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 1142cxIK021916 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Wed, 3 Feb 2021 21:38:59 -0500 Received: from oc11exedge2.exchange.mit.edu (OC11EXEDGE2.EXCHANGE.MIT.EDU [18.9.3.18]) by outgoing-exchange-1.mit.edu (8.14.7/8.12.4) with ESMTP id 1142cwnC005637 for ; Wed, 3 Feb 2021 21:38:59 -0500 Received: from w92expo25.exchange.mit.edu (18.7.74.31) by oc11exedge2.exchange.mit.edu (18.9.3.18) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Wed, 3 Feb 2021 21:38:39 -0500 Received: from oc11exhyb1.exchange.mit.edu (18.9.1.60) by w92expo25.exchange.mit.edu (18.7.74.31) with Microsoft SMTP Server (TLS) id 15.0.1365.1; Wed, 3 Feb 2021 21:38:58 -0500 Received: from NAM04-DM6-obe.outbound.protection.outlook.com (104.47.73.40) by oc11exhyb1.exchange.mit.edu (18.9.1.60) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Wed, 3 Feb 2021 21:38:58 -0500 Received: from DM6PR08CA0052.namprd08.prod.outlook.com (2603:10b6:5:1e0::26) by CY4PR01MB2296.prod.exchangelabs.com (2603:10b6:903:25::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3784.11; Thu, 4 Feb 2021 02:38:54 +0000 Received: from DM6NAM11FT029.eop-nam11.prod.protection.outlook.com (2603:10b6:5:1e0:cafe::17) by DM6PR08CA0052.outlook.office365.com (2603:10b6:5:1e0::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3825.19 via Frontend Transport; Thu, 4 Feb 2021 02:38:54 +0000 Received: from sonic313-13.consmr.mail.ne1.yahoo.com (66.163.185.36) by DM6NAM11FT029.mail.protection.outlook.com (10.13.173.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3784.12 via Frontend Transport; Thu, 4 Feb 2021 02:38:54 +0000 Received: from sonic.gate.mail.ne1.yahoo.com by sonic313.consmr.mail.ne1.yahoo.com with HTTP; Thu, 4 Feb 2021 02:38:53 +0000 From: Dmitriy Kiryashov To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Wed, 3 Feb 2021 18:38:53 -0800 Subject: Re: [EE] Measuring PCB copper weight? Thread-Topic: [EE] Measuring PCB copper weight? Thread-Index: Adb6oENatX+ehDL9RTiqEg90zw5kFQ== Message-ID: <1811845610.2321454.1612406333236@mail.yahoo.com> 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: None (protection.outlook.com: sbcglobal.net does not designate permitted sender hosts) dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sbcglobal.net; s=s2048; t=1612406333; bh=vPZuaXVPFnJN3h3fEeHjbR8Zt+r/QusN6MEeBU0cu4g=; h=Date:From:To:In-Reply-To:References:Subject:From:Subject:Reply-To; b=H8Mod5MreQa401dZ/TU9TaDbzaPUu9CxO2kSTFp7bU/0kAOKXR2+/3bRquQ2c1UKZGXR2SJG3SEoUped1VD8xsj0MLgrOdavA2FS2Txhtft/2SD49VhdTWBynMqgnYQjT9l0SkuqsALKaTuBiK1OFYFjydSTIXVdKfTEpE9UwsK6LlgXqmbwgRZaZS+2tA1/gmhcKujWLT1GFBr8JJsWSR/jsuDVTWJG0Zn2SH5yhsoN6z5QxRviBSGi0t60R1cFJbwU39lTrgY8rE9np1Defcu8Ozvp2Z5LRvisccZlsXAf+HH1sL/YsjNrFfPBCYpU6tD0YL0LO2gLYuKodztJog== authentication-results: spf=none (sender IP is 66.163.185.36) smtp.mailfrom=sbcglobal.net; mit.edu; dkim=pass (signature was verified) header.d=sbcglobal.net;mit.edu; dmarc=bestguesspass action=none header.from=sbcglobal.net; 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-topics: [EE] x-content-filtered-by: Mailman/MimeDel 2.1.6 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 IDJuZCBvbiB0aGlzIGFwcHJvYWNoIGFzIG1vc3QgcHJhY3RpY2FsIGFuZCBsZWFzdCBtZXNzeS4K ClVzaW5nIDR4IHdpcmVzIERNTSB3aXRoIHVuZGVyIDIgbU9obSAicmVzaWR1YWwiIHJlc2lzdGFu Y2UgbGVmdCBhbmQga25vd2luZyB0cmFjZSB3aWR0aCB3aWxsIGFsbG93IHRvIHJldmVyc2UgY2Fs Y3VsYXRlIGNvcHBlciB0aGlja25lc3MgcXVpY2tseS4KCllvdSB3aWxsIG9ubHkgbmVlZCB0byBj YXJlZnVsbHkgcmVtb3ZlIC8gc2NyYXRjaCBvZmYgaW5zdWxhdGlvbiBmcm9tIGNvdXBsZSBvZiBz cG90IGFib3ZlIHRoYXQgY29wcGVyIHRyYWNlIGluIHF1ZXN0aW9uIGF0IHNvbWUgZGlzdGFuY2Ug ZnJvbSBlYWNoIG90aGVyCiggc28geW91IHRvdGFsIG1lYXN1cmVkIHRyYWNlIHJlc2lzdGFuY2Ug d2lsbCBiZSBhYm92ZSAyMCBtT2htIGF0IGxlYXN0ICkKCiAgICAgT24gV2VkbmVzZGF5LCBGZWJy dWFyeSAzLCAyMDIxLCAwOToxNDoxNiBBTSBQU1QsIFNwZWhybyBQZWZoYW55IDxzcGVmZkBpbnRl cmxvZy5jb20+IHdyb3RlOiAgCiAKIE1lYXN1cmUgdGhlIHJlc2lzdGFuY2Ugb2YgYSBrbm93biB3 aWR0aC9sZW5ndGggdHJhY2U/IAoKSWYgeW91IGRvbuKAmXQgaGF2ZSBhIDQtd2lyZSBvaG1tZXRl ciwgcHV0IGEga25vd24gZmFpcmx5IGxhcmdlIChidXQgbm90IGxhcmdlIGVub3VnaCB0byBjYXVz ZSB0b28gbXVjaCBoZWF0aW5nIHRvbyBxdWlja2x5KSBjdXJyZW50IHRocm91Z2ggdGhlIHRyYWNl IGFuZCBtZWFzdXJlIHRoZSBtViBkcm9wIGlud2FyZHMgb2Ygd2hlcmUgdGhlIGN1cnJlbnQgaXMg aW5qZWN0ZWQuIAoKQmVzdCByZWdhcmRzLCBTUAoKPiBPbiBGZWIgMywgMjAyMSwgYXQgMTI6MDAg UE0sIENsaW50IEpheSA8Y2pheXNoYXJwQGdtYWlsLmNvbT4gd3JvdGU6Cj4gCj4g77u/TWljcm9t ZXRlcj8gVGhlIHRoaWNrbmVzcyBvZiB0aGUgY29wcGVyIHNob3VsZCBiZSBhIGdpdmVhd2F5Cj4g Cj4+IE9uIFdlZCwgMyBGZWIgMjAyMSwgMTY6MDEgTmVpbCwgPHBpY2R1ZGUzQG5hcndhbmkub3Jn PiB3cm90ZToKPj4gCj4+IElzIHRoZXJlIGEgc2ltcGxpc2ggd2F5IHRvIGZpZ3VyZSBvdXQgb3Ig bWVhc3VyZSB0aGUgY29wcGVyIHdlaWdodCBvbiBhbgo+PiBleGlzdGluZyBQQ0I/Cj4+IAo+PiBJ J20gYXNraW5nIGJlY2F1c2UgSSdtIHJlZG9pbmcgYSBsYXlvdXQgZm9yIHNvbWVvbmUgYW5kIEkg ZGlkIG5vdCBkbyB0aGUKPj4gb3JpZ2luYWwgY2lyY3VpdCBkZXNpZ24sIHNvIHdhcyBwbGFubmlu ZyB0byB1c2UgdGhlIHNhbWUgdHJhY2Ugd2lkdGhzIGFzCj4+IG9uIHRoZSBvcmlnaW5hbCBib2Fy ZCwgYnV0IEknbGwgbmVlZCB0byBrbm93IHRoZSBjb3BwZXIgd2VpZ2h0IHRvIG9yZGVyCj4+IGEg cHJvdG90eXBlIGJvYXJkLgo+PiBJZiBJIGhhdmUgdG8gcmVkbyB0aGUgbWF0aCBvbiBjdXJyZW50 IGV0YywgdGhhdCBvcGVucyB1cCBhbm90aGVyIGNhbiBvZgo+PiB3b3JtcyBhcyBJIGRvbid0IGhh dmUgYWxsIG9mIHRoZSBzcGVjcyBvdGhlcndpc2UuCj4+IEFuZCB0aGUgY29wcGVyIGRvZXMgZmVl bCB0aGlja2VyIHRoYW4gdXN1YWwuCj4+IAo+PiBUaGFua3MuCj4+IAo+PiAKPj4gCj4+IAo+PiAt LQo+PiBodHRwOi8vd3d3LnBpY2xpc3QuY29tL3RlY2hyZWYvcGljbGlzdCBQSUMvU1ggRkFRICYg bGlzdCBhcmNoaXZlCj4+IFZpZXcvY2hhbmdlIHlvdXIgbWVtYmVyc2hpcCBvcHRpb25zIGF0Cj4+ IGh0dHA6Ly9tYWlsbWFuLm1pdC5lZHUvbWFpbG1hbi9saXN0aW5mby9waWNsaXN0Cj4+IAo+IC0t IAo+IGh0dHA6Ly93d3cucGljbGlzdC5jb20vdGVjaHJlZi9waWNsaXN0IFBJQy9TWCBGQVEgJiBs aXN0IGFyY2hpdmUKPiBWaWV3L2NoYW5nZSB5b3VyIG1lbWJlcnNoaXAgb3B0aW9ucyBhdAo+IGh0 dHA6Ly9tYWlsbWFuLm1pdC5lZHUvbWFpbG1hbi9saXN0aW5mby9waWNsaXN0CgoKLS0gCmh0dHA6 Ly93d3cucGljbGlzdC5jb20vdGVjaHJlZi9waWNsaXN0IFBJQy9TWCBGQVEgJiBsaXN0IGFyY2hp dmUKVmlldy9jaGFuZ2UgeW91ciBtZW1iZXJzaGlwIG9wdGlvbnMgYXQKaHR0cDovL21haWxtYW4u bWl0LmVkdS9tYWlsbWFuL2xpc3RpbmZvL3BpY2xpc3QKICAKLS0gCmh0dHA6Ly93d3cucGljbGlz dC5jb20vdGVjaHJlZi9waWNsaXN0IFBJQy9TWCBGQVEgJiBsaXN0IGFyY2hpdmUKVmlldy9jaGFu Z2UgeW91ciBtZW1iZXJzaGlwIG9wdGlvbnMgYXQKaHR0cDovL21haWxtYW4ubWl0LmVkdS9tYWls bWFuL2xpc3RpbmZvL3BpY2xpc3QK .