X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
Message-ID: <1394575892.2127.25.camel@AMD64X2.fritz.box>
Subject: Re: [geda-user] Declare a pin as GND in symbol
From: Stefan Salewski <mail AT ssalewski DOT de>
To: geda-user AT delorie DOT com
Date: Tue, 11 Mar 2014 23:11:32 +0100
In-Reply-To: <CALSZ9gpUxtTiN16u6SypxwCZWQZGOGeE77peF0YnKs7FrOkpBw@mail.gmail.com>
References: 
	<CALSZ9gpUxtTiN16u6SypxwCZWQZGOGeE77peF0YnKs7FrOkpBw AT mail DOT gmail DOT com>
Content-Type: text/plain; charset="UTF-8"
X-Mailer: Evolution 3.10.4 
Mime-Version: 1.0
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 Tue, 2014-03-11 at 17:48 -0400, Rob Butts wrote:
> I couldn't find the answer in the symbol guide.
> 
> I made a symbol for an 8-pin soic component that has a thermal pad under
> the chip that is recommended to connect to ground.  I don't want to show
> the pin on the symbol but want to declare that hidden pin as a GND:1 net
> connection.
> 
> I've seen it in symbols but can't find how to do it.

You may see

http://wiki.geda-project.org/geda:na_howto

Older logic symbols often have attributes like

less /usr/share/gEDA/sym/74/7400-1.sym
T 500 2850 5 10 0 0 0 0 1
net=Vcc:14
T 500 3050 5 10 0 0 0 0 1
net=GND:7

Not all people love hidden pins -- and of course you will need a
footprint with central pin with matching name/number.