Mail Archives: geda-user/2013/10/13/10:27:49
X-Authentication-Warning: | delorie.com: mail set sender to geda-user-bounces using -f
|
X-Recipient: | geda-user AT delorie DOT com
|
DKIM-Signature: | v=1; a=rsa-sha1; c=relaxed; d=penguindevelopment.org; h=
|
| message-id:date:from:mime-version:to:subject:content-type
|
| :content-transfer-encoding; s=penguindevelopment.org; bh=UOHcWiu
|
| ngqnx2yTObbYerqn73Ug=; b=kZUxEyQMUz0SHBRF3xC77ML/auBlQ6JFrCxI9zV
|
| tHweHmThYsz/frgh/m8TfLnLXkni+kldma60cQNOBdjCwXmohLwTZSq1JMRuf1av
|
| 0MSUUQf3VCUW3MIjM8MvMG8UhHRMhvU9kU2Z77deTNzoRxS6TD0osYXarc8QM+rU
|
| yYow=
|
Message-ID: | <525AADB0.8030508@penguindevelopment.org>
|
Date: | Sun, 13 Oct 2013 16:26:56 +0200
|
From: | Peter <link AT penguindevelopment DOT org>
|
Organization: | Penguin Development
|
User-Agent: | Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130927 Thunderbird/17.0.9
|
MIME-Version: | 1.0
|
To: | geda-user AT delorie DOT com
|
Subject: | [geda-user] Dealing with internal connections
|
X-MIME-Autoconverted: | from quoted-printable to 8bit by delorie.com id r9DEQvX9030949
|
Reply-To: | geda-user AT delorie DOT com
|
Some components (e.g. standard 4-pin tactile switches) have internal
connections between pins, which is a feature I sometimes want to exploit
to make routing easier.
To deal with that, I've so far just given the internally connected pins
the same name; when you connect just one of the pins, PCB will complain
that the other one isn't connected, which can be worked around by
connecting them with a trace on a "fake connection" layer.
Now, however, I want to do the same with a surface mount component. The
"fake connection" trick doesn't work there, because all connections need
to be on the same side as the pads, so I'm wondering if there's a better
way to do it that doesn't involve heavy editing of the schematic, and
that will still stop PCB from telling me I need to connect the pads.
So basically, suppose I have, for example, a surface-mounted tactile
switch as follows:
1a |__| 2a
|##|
|##|
1b |¯¯| 2b
Pads 1a and 1b are internally connected and are both called "1" in the
footprint. In the schematic, I just have a 2-pin switch. I'd like for
PCB to recognise a connection to either pad 1a or 1b as a connection to
*both* pads, without having to edit my schematic to make all of the
switches have 4 pins. (That problem with that would be that I'd have to
edit the schematic a lot during the PCB design process, which I want to
avoid.) Is there any current way to do this in PCB? If not, should I
just ignore the remaining rat lines?
Thanks in advance,
Peter
--
http://www.penguindevelopment.org/ -- Free and open source software and
hardware
- Raw text -