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]" 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: References: <55B7849E DOT 6070401 AT envinsci DOT co DOT uk> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed 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 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