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Wed, 22 Jul 2015 03:24:18 -0700 (PDT) | |
Subject: | Re: [geda-user] [OT] I need help with selecting components |
To: | geda-user AT delorie DOT com |
References: | <1507220238 DOT AA03807 AT ivan DOT Harhan DOT ORG> |
<201507220247 DOT t6M2leS2006081 AT envy DOT delorie DOT com> | |
From: | "Sabin Iacob (iacobs AT m0n5t3r DOT info) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> |
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Date: | Wed, 22 Jul 2015 13:24:16 +0300 |
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --VQkLAATvUXoCfppgW0iv9V2UVepKSvObw Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 07/22/2015 05:47 AM, DJ Delorie wrote: >> But what about the polarity? > I think I use a hacked 0603 footprint for mine, which has a polarity > indicator, but I usually end up looking at the schematics to determine > which way to put LEDs on. Even then, it's hard to figure out which > pin is which on the LED itself. However, that's the type of LED eval > boards use. SOD323 is about the same size as 0603 and has polarity; in my footprint collection I have 2 variants, one with smaller pads (downloaded from somewhere, possibly John Luciani's site)[1] and the one in pcblib-newlib with larger pads and a slightly larger outline, but the distance between pads is exactly the same as for 0603 The one with smaller pads makes it easier to route a trace between them, and might help getting a compact board when designing for automated assembly, thile the other one should be easier to hand solder. [1] http://luciani.org/geda/pcb/footprints-gif/Diode-gif.html --VQkLAATvUXoCfppgW0iv9V2UVepKSvObw Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBAgAGBQJVr29QAAoJEIIekQf3ltoLstEP/ihRVwlQ7uI8pBnO4/PwO7wm fXiRAAT5Y9wNCmSPtbu9xfafk28zWBiVVJh/SyebHr4coSEt0H1ttsV1axIA7iz7 benOxeK2KYCBHbOdzcN76Uj2P9nNW3xa8audqZPBFafaQMj4jqtXrOsi/4d18whf 4lS07EIlaDhY+Vf3p4yHzflZMcT2e3UaimmQjSvBJvOurA6zVWO/RLAjsn5iIpxh TFGoJgC33uqgdf/22ldYQ470QCmMEN4p/WqhmaQQfO/hwgi1M9kJ0qTm7sGdO6X3 RyutwAvX+UPBDGjGeSELRJMp/ZZ6JiV/oBAyr8xpZKruyP/X0yMWSyreel02GkHO hW/o4RmMsv6sqXztRdDtUlGemUYwTriUCB8CLpdbf/NTN1v6PPMWnLnomj0BhnRP +wtbYwWt53KXrBWjJPRjLZ27Sigz8rS9l+d7JqwCx9UtiGFzMJ9syMlIhVzJfla2 BZHNxPA6ZBWBRtMpeYaetRU08KwGiDxYiGp58ku0QwYLJO2FWfnj2xZFvgEuW/uW TAEGr6u1iVMH49MjQNcXKJshouEd+I93+UiGlEF9aeMTOLvslXtT8q+yJ/vUYuPB szuGr+/LGweOEurh4LWTyed1KcjKPbRsTG69bFLltNRPjiWLakKh//3TBeAyi71v dvltJC7G0ls3Okpppk8m =FYWp -----END PGP SIGNATURE----- --VQkLAATvUXoCfppgW0iv9V2UVepKSvObw--
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