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From: geda AT psjt DOT org (Stephan =?utf-8?Q?B=C3=B6ttcher?=)
To: "Dave McGuire \(mcguire\@neurotica.com\) \[via geda-user\@delorie.com\]" <geda-user AT delorie DOT com>
Subject: Re: [geda-user] How to define for an exposed pad to connect to 3 pins/pads
References: <xnmuuy6a7j DOT fsf AT envy DOT delorie DOT com>
	<910e5ecd-24a2-fdb6-432a-0fa913cf3559 AT neurotica DOT com>
Date: Wed, 11 Jul 2018 00:33:47 +0200
In-Reply-To: <910e5ecd-24a2-fdb6-432a-0fa913cf3559@neurotica.com> (Dave
	McGuire's message of "Tue, 10 Jul 2018 18:06:48 -0400")
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"Dave McGuire (mcguire AT neurotica DOT com) [via geda-user AT delorie DOT com]"
<geda-user AT delorie DOT com> writes:

>   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.

The footprint has three pins, the schematic symbol only two.  Add a net=
attribute to the symbol instance to tell where the third pin shall
connect to

  net=GND:3

I've done exacly that with a voltage regulator in SOT223 package,

  net=out:4

to connect pins 2 and 4 (the pad).

Gruß,
-- 
Stephan