Mail Archives: geda-user/2017/01/28/13:58:25
Hello Peter,
Peter Clifton (petercjclifton AT googlemail DOT com) [via
geda-user AT delorie DOT com] schreef op za 28-01-2017 om 16:58 [+0000]:
> I'm not at my computer to check, but does it treat it as shorted if
> you overlap three pads?
>
> [ 1 [ ] [ ] 2 ] (middle pad not named)
>
> I don't recall whether the connection checking code considers the
> possibility of connections between pads with different names, but I do
> (vaguely) recall there being a work around for the kind of thing your
> trying to do. As you learnt though, it isn't something we support in
> any easy or elegant way.
Unfortunately, this is not the case. Overlapping pads are (correctly)
recognized as shorted, regardless of pad name or pin number attributes.
The loop antenna example I made has 7 pads in all: 2 'true' numbered
pads for the netlist, and 5 pads in a rectangular C shape making up the
antenna. No matter what name and/or number attributes I give those 5
pads, PCB signals them as a short between pads 1 and 2, and thus as an
error.
I also tried approaching the issue from the other side, defining a loop
antenna symbol in gschem with pins 1 and 2 already connected through a
net (pre-shorted, so to speak). However, PCB doesn't fall for this trick
and bluntly keeps flagging this construct as a short, for reasons
unknown.
Anyway, as said it's not a big deal, mostly because designs usually
don't have lots of antennas or other special elements made out of copper
traces (e.g. inductors or heating areas). Still it would be nice if the
functionality for this could be implemented some day.
Thanks for all the replies so far,
Best regards,
Richard Rasker
Linetec
--
Linetec Translation and Technology Services
Vleerkottelanden 14
7542 MJ Enschede
The Netherlands
+31-53-4350834
http://www.linetec.nl/
e-mail: rasker AT linetec DOT nl
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