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Mail Archives: geda-user/2012/12/17/04:20:07

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Date: Mon, 17 Dec 2012 10:18:55 +0100
Message-ID: <CACwWb3BvZj-sr_63yFiD8gO0NwXD47rtibqBEaAD2LMvf6de1w@mail.gmail.com>
Subject: Re: [geda-user] Find rat lines
From: Levente <leventelist AT gmail DOT com>
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On Mon, Dec 17, 2012 at 4:37 AM, Peter Stuge <peter AT stuge DOT se> wrote:

> John Doty wrote:
> > Short circuits involve engineering intention
>
> What? The short circuit discussed here is about separate nets in the
> netlist being connected together by copper in a design.
>
>
>
Take the situation when you have A_GND and D_GND net for analogue and
digital ground. You WANT to short it in one point. I usually do it with a 0
Ohm resistor, or I short the nets in PCB.



> > > The only bad thing with PCB's method is the highlighting of shorts
> >
> > I don't think that a program can reliably deduce the intention of
> > the designer here
>
> I don't think anyone is working toward such a goal. Why do you think
> that?
>
> The goal is to visualize violations of intent - nets connected
> together in spite of being separate in the netlist - in the most
> useful way possible, to save the board designer's time searching
> for the violating connection.
>
>
> //Peter
>

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<br><br><div class=3D"gmail_quote">On Mon, Dec 17, 2012 at 4:37 AM, Peter S=
tuge <span dir=3D"ltr">&lt;<a href=3D"mailto:peter AT stuge DOT se" target=3D"_bla=
nk">peter AT stuge DOT se</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quot=
e" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
John Doty wrote:<br>
&gt; Short circuits involve engineering intention<br>
<br>
What? The short circuit discussed here is about separate nets in the<br>
netlist being connected together by copper in a design.<br>
<div class=3D"im"><br>
<br></div></blockquote><div><br>Take the situation when you have A_GND and =
D_GND net for analogue and digital ground. You WANT to short it in one poin=
t. I usually do it with a 0 Ohm resistor, or I short the nets in PCB.<br>
<br>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;b=
order-left:1px #ccc solid;padding-left:1ex"><div class=3D"im">
&gt; &gt; The only bad thing with PCB&#39;s method is the highlighting of s=
horts<br>
&gt;<br>
</div><div class=3D"im">&gt; I don&#39;t think that a program can reliably =
deduce the intention of<br>
&gt; the designer here<br>
<br>
</div>I don&#39;t think anyone is working toward such a goal. Why do you th=
ink<br>
that?<br>
<br>
The goal is to visualize violations of intent - nets connected<br>
together in spite of being separate in the netlist - in the most<br>
useful way possible, to save the board designer&#39;s time searching<br>
for the violating connection.<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
<br>
//Peter<br>
</font></span></blockquote></div><br>

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