X-Authentication-Warning:	delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient:	geda-user AT delorie DOT com
Date:	Tue, 28 Jul 2015 15:56:29 +0200 (CEST)
X-X-Sender:	igor2 AT igor2priv
To:	"Matt Rhys-Roberts (matt DOT rhys-roberts AT envinsci DOT co DOT uk) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
X-Debug:	to=geda-user AT delorie DOT com from="gedau AT igor2 DOT repo DOT hu"
From:	gedau AT igor2 DOT repo DOT hu
Subject:	Re: [geda-user] gschem: assigning multiple pcb pad numbers to one
	schematic pin?
In-Reply-To:	<55B7849E.6070401@envinsci.co.uk>
Message-ID:	<alpine.DEB.2.00.1507281551290.6924@igor2priv>
References:	<55B7849E DOT 6070401 AT envinsci DOT co DOT uk>
User-Agent:	Alpine 2.00 (DEB 1167 2008-08-23)
MIME-Version:	1.0
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

On Tue, 28 Jul 2015, Matt Rhys-Roberts (matt DOT rhys-roberts AT envinsci DOT co DOT uk) [via geda-user AT delorie DOT com] wrote:

> The default SOT223 footprint (3 legs and a large pad) has pads numbered 1~4, 
> but the device I want to use it with only has 3 different pins effectively. I 
> don't want to get into editing the FP it if I don't have to.
>
> My device has pins numbered 1,2,3 and the pad is connected to pin 2.
>
> Can I modify the schematic symbol so that pin 2 can be connected to pads 2 and 
> 4 somehow? I would hope that setting the attribute pinnumber=2,4 *should* 
> work, but I've not got time to experiment, and I can't find anything in the 
> docs about this.

With vanilla pcb you have three choices, as far as I know:

1. decide which one pin you use, in each instance, and have that connected 
on the schematics (requires 4 pin symbol on the schematics)

2. make a footprint where both pins have the same number - so there are 
pin 1, 2 and 3 and what used to be pin 4 is pin 2 now; whichever pin 2 you 
connect to in PCB is up to you (requires 3 pin symbol in schematics but a 
modified footprint in pcb)

3. keep pins 1, 2, 3 and 4 in PCB and connect pin 2 and 4 toghether on the 
schematics too (requires 4 pin symbol on schematics)

Regards,

Igor2

- Raw text -