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[49.179.142.238]) by smtp.gmail.com with ESMTPSA id o18sm12041713pfp.88.2020.11.29.00.35.08 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Sun, 29 Nov 2020 00:35:08 -0800 (PST) Received: from james by esk with local (Exim 4.90_1) (envelope-from ) id 1kjIAh-0004Wm-E2; Sun, 29 Nov 2020 19:35:03 +1100 From: James Cameron To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Sun, 29 Nov 2020 00:35:03 -0800 Subject: Re: [OT] Cheap microscopes Thread-Topic: [OT] Cheap microscopes Thread-Index: AdbGK+GtMaeycSdLSiq/FeTL1WKkTg== Message-ID: <20201129083503.GA17070@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 209.85.210.180 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.210.180; helo=mail-pf1-f180.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=S3DdlK+8tUZVFS6eAgm5VrPaqQbCR3JOH1LyQVxFJF4=; b=MPnzH9LFu8qYE40rhxDojZAkP5GVVxn4i9AfvMwT3zGrTOmgmspklGP3Bfd0sBkCDF iicjCu/tV8aUvf2qz0RPm55I7IgHJ7Cj+ZEilCymbR4nJcekxX6wcSZpG+Y90YwJBbnT EQ8x1H6+YJAtsKqW4TXlzjlzvWl5of1t2kdpp6PqpW9Gp3Tcn89S9Fpl8TF/PUEM2J+G +GBC5TmcfTxWZJzp+dXa0Swo0ZenpDEJZ5dGEhYi3jPEbKCtAYZ6gBguA41dnh/fRVOI 0VFlgAQvEhIUSsfCmVwXTrPfPbHFuLzsXSUzPty2PfTV2IQql0LGsvfqOv/fWMuyqmu/ QA0w== authentication-results: spf=pass (sender IP is 209.85.210.180) 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:a63:3e0f:: with SMTP id l15mr13222686pga.208.1606638909455; Sun, 29 Nov 2020 00:35:09 -0800 (PST) x-topics: [OT] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 On Sat, Nov 28, 2020 at 01:43:08PM -0500, Josh Koffman wrote: > I find the ring light can do an excellent job of washing out any > markings on an IC, but if you hit it with light from the side it > appears just fine. I've also found choosing the colour of the light from the side can make a big difference. I keep a few red, green and blue LEDs handy with a CR2032 for this purpose. --=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 .