delorie.com/archives/browse.cgi   search  
Mail Archives: geda-user/2015/07/22/06:25:08

X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
X-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=m0n5t3r.info; s=m0n5t3r;
h=subject:to:references:from:message-id:date:user-agent:mime-version
:in-reply-to:content-type;
bh=0UjKWcZx9/KRITB+ErhvoZMvd2FvBRIB+OCY8tZzo2Q=;
b=lB2mWgQ6jhJxfVK6H4RAq/O7htMnYSLLtybuTBBhExpYNqpG0SvOhygVUKVmGfBNRc
p4M7kZjIRqISHfkmzy5ZIgFxkc9UHQuiUrgoqDgvAEvjU6rD6WaXgUvtTVdRZbHn/Yu0
YUDjgBxjc4iPVcIEzVUEFeOIN0dKbx6q/B4Co=
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20130820;
h=x-gm-message-state:subject:to:references:from:message-id:date
:user-agent:mime-version:in-reply-to:content-type;
bh=0UjKWcZx9/KRITB+ErhvoZMvd2FvBRIB+OCY8tZzo2Q=;
b=gb/Q+PEO4N+/oR25vK8bS8ToI0NTP5RrHP52bXTjvtXumFZJ6KvUeW5CCLVzy7kyQV
jWklPNiefWWyvKhgiNWecxQLCAYb+4goZohAcIM1FhrXi1uj9Bd+1BqY42NnvBjQDlaf
cY2CkgUGMmYy7MfWOTM1zzTttJENa08swvVba8I8aD7w9oO0pjicNwcGoodUqJl5cwMr
/jzsBVmLPUaaEPjvqhtGo4geJPPa7xFsPcBm8wpgRdsBbsQcayAzmH2oFjmYb/8DsWbr
hNhRRA+dsW1IJw+ZvHPbA8BMeB/rFDBn3+u1gl+9VUciz9Anodr1hn1HX/IdbsCwLoOk
q2jA==
X-Gm-Message-State: ALoCoQlR1bYxAsDbKktbe1Svyi/2gZF1+qBcGUo17tWWS02wVjFkBBVQmSK8n0ajbWZoNZRujOKJ
X-Received: by 10.180.76.193 with SMTP id m1mr39961750wiw.11.1437560658602;
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>
X-Enigmail-Draft-Status: N1110
Message-ID: <55AF6F50.90801@m0n5t3r.info>
Date: Wed, 22 Jul 2015 13:24:16 +0300
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101
Thunderbird/38.0
MIME-Version: 1.0
In-Reply-To: <201507220247.t6M2leS2006081@envy.delorie.com>
Reply-To: geda-user AT delorie DOT com
Errors-To: nobody AT delorie DOT com
X-Mailing-List: geda-user AT delorie DOT com
X-Unsubscribes-To: listserv AT delorie DOT com

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
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=FYWp
-----END PGP SIGNATURE-----

--VQkLAATvUXoCfppgW0iv9V2UVepKSvObw--

- Raw text -


  webmaster     delorie software   privacy  
  Copyright © 2019   by DJ Delorie     Updated Jul 2019