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Date: Thu, 12 May 2016 05:42:18 +0200 (CEST)
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To: "Stephen Ecob (stephen DOT ecob AT sioi DOT com DOT au) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Subject: Re: [geda-user] Differential pair support
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On Thu, 12 May 2016, Stephen Ecob (stephen DOT ecob AT sioi DOT com DOT au) [via geda-user AT delorie DOT com] wrote:

> My current PCB project needs differential pairs.  I'm thinking of
> writing a script to replace selected traces of (say) thickness 19 mil
> with a pair of 7 mil traces with spacing 5 mil.  Before I start work,
> has anyone already implemented something like this ?

According to the pcb-rnd feature poll, this is one of the features I 
likely to implement in the near future in pcb-rnd. I have plans to do it 
the same way as you described: lie to all parts of the code that we are 
drawing a single wide trace, then replace it with 2 (or more) traces at 
the end (the moment the user clicks).

If you finish your script before I get to do this feature, please share 
your experience about using this trick!

Regards,

Igor2