X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
X-Virus-Scanned: amavisd-new at neurotica.com
X-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=neurotica.com;
	s=default; t=1531260409;
	bh=nzCmqyxSWS32peiJO/cQePrXN3+Bwr4Pi4kGR4xKJ0M=;
	h=Subject:To:References:From:Date:In-Reply-To;
	b=GbEz8icTugh8+K7s6cCErd0I6CaNaNmdQYeCYaeo0jEBbruf8DlEg2wR2OwVAt9LT
	 9W2ATYTZObvKf1X7YcPBqjBcp4GKRtAyUeZV4LqNutBCARCAZdl0ZSsiEw47Nxx4qA
	 6COMQPoPxwJ4Q2FV6REo3gq2tjQqiNQNu+t2omC0=
Subject: Re: [geda-user] How to define for an exposed pad to connect to 3
 pins/pads
To: geda-user AT delorie DOT com
References: <xnmuuy6a7j DOT fsf AT envy DOT delorie DOT com>
From: "Dave McGuire (mcguire AT neurotica DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Openpgp: preference=signencrypt
Autocrypt: addr=mcguire AT neurotica DOT com; prefer-encrypt=mutual; keydata=
 xsBNBE90TjYBCACrtN5OyxdOGHWrUcxe4e6fFLaXpA7GIjN9pkTmbb2ozKNxgDKl6Gfk7ywx
 19E+jUbO4KQ4/nhDvXXtWIH2J1a0eiRiDdaENzBtGxoiDIf6vJshMY0vKUn2OQfVn6kaQ5PY
 so5oPrNaJCphJDT/G8S6UzpvjB5UXrUb8625cD08H2Sx1Id79p8JYxs8tFZ1b9qViq8HisDB
 nmziw6oQoqpdMt3D1TX6XdeybfVCigyR26pQ60C/kzOVqT6BzR5ZxP3eTQQQnXc/MQxF3gkP
 49g0/HdLjtDd9HyoDGydK83oDVgECxSXaAy/IO4rWgYJlQCaTScZLyJSn7uXPbSCHXTfABEB
 AAHNJERhdmUgTWNHdWlyZSA8bWNndWlyZUBuZXVyb3RpY2EuY29tPsLAfgQTAQIAKAIbIwYL
 CQgHAwIGFQgCCQoLBBYCAwECHgECF4AFAlr2Br0FCQ9EH10ACgkQTm0vsniSDMRRlQgAjNlC
 jNJpfcMz8YIELVzpTkPyKHAjHAsuuWzORCRpCP5i67FaOnP2jpdTEP50gxHiB4SqfVPshN4+
 DEjsXiCLjqMIrR/5vgXRGa/F0Q4x5TbylzECmikv2zkRUnTnjt3g3o0ByCRSmGvZtIOaNTX5
 Zc/EKrDPlRLKNYNHxmRWH54nrflDBvpxHMx38ZH5wXIL34RFozdafqb+C1uJkxx0/X1DS/Ct
 iIfsOX+FgqMRrS4855p1rYyWnxrsyPU09TNx1cYbL4lIQtlDJpibLnbCo/y0u6IcfrEA8t4p
 nj7QD3TLI01+FrK5Q9vkZ4vyM+XXs6ANoe/p47z+3l9AxtOj8c7ATQRPdE42AQgAuBxBsLxu
 AyyexLICB3NJ4Fu85/Wx0bESlBDPia3+jCfR8sjZ5PWlklJUlpBOc3CXmxwk4QPVTKDHM6kB
 GBq2etfMq9tGMrIhG68kY4KxcRw8mMTVMNeZaJQTa0+6X2MTNvesnutmYqiTEtnsv2R7WfU+
 VAV5Fp9Opmb7bkkQ0uEKazDsLzYnaeg54hALx286inLN/T26eF6UwfrIRQpnYyEE3ip7BNlV
 YvrypzAFu+xlt+4o+yue67YZDrDX8qx/TQeSuGYUAfpdLro2t3w9Bg5qjMdwi4kA20BUgCiZ
 2dS0ApgJwuKnY79YgKq92tD557Ky8m1MM84UNNfnO2ln+QARAQABwsBlBBgBAgAPAhsMBQJa
 9gbYBQkPRB+fAAoJEE5tL7J4kgzEFToH/A5iL95Lou/0eDN1fBNUYj+00PlT5K+3h4QobhOx
 UWUPwJck2/SoIJPOkjk25FnMEsFvPBlkENdf6LmENWskOv5pvZqnc8IKLr5U3RIdkzw/OwGZ
 /imF+XdYhtGSlhAoxbJ8aTSJ2rkviBVLXH8m1zdKZveEnTJg620LBMbfKuZLwcTJ37oUdOYn
 eEbH5tb/eOKxGLId3Z59CGfsDXzwkk8PZn2U+vU0W5NPpOmg20q3iX0STsaFTIlCrOgTmFmh
 woJYFp7FNsv1Qmxbbvk8kvUe+VCsHiZa+UeYlk1GlJwKmLqJyM4IHi3e+TfsIYLjxsacu4eu
 M9oEb/I2cu6GcfA=
Message-ID: <910e5ecd-24a2-fdb6-432a-0fa913cf3559@neurotica.com>
Date: Tue, 10 Jul 2018 18:06:48 -0400
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.8.0
MIME-Version: 1.0
In-Reply-To: <xnmuuy6a7j.fsf@envy.delorie.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
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
Precedence: bulk

On 07/10/2018 05:40 PM, DJ Delorie wrote:
> Typically you'd treat the exposed pad like any other pin/pad, give it a
> pinnumber (make one up) and expose it in the schematic symbol.
> 
> Then you'd connect all four grounds (AGND, DGND, PGND, EP) in the
> schematic, then in the layout.

  Ok.  That's an easy case, and that's what I've done for many things
like this.  But others, like components that use an existing footprint,
will require something different.

  For example, the specific thing that hit me this morning was a power
resistor in a DPAK package, whose pad is electrically isolated, but I
want to solder it down and connect it to the plane thermally.  In the
schematic, I use a standard resistor, which has two pins, 1 and 2.  The
DPAK PCB footprint has pin 3, which is what gave me trouble.

  There have been a few other replies to this which I've not yet gone
over, but I will tonight.

               -Dave

-- 
Dave McGuire, AK4HZ
New Kensington, PA