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	Fri, 11 Mar 2016 11:50:22 -0800 (PST)
From:	"James Battat (jbattat AT wellesley DOT edu) [via geda-help AT delorie DOT com]" <geda-help AT delorie DOT com>
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Subject:	Re: [geda-help] Copper connection in pcb between different nets in gschem
Date:	Fri, 11 Mar 2016 14:50:19 -0500
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I=92m also hesitant to use the =93do this at the last minute=94 scheme.

A through hole jumper is certainly an option, but I was hoping for a =
solution that didn=92t require a physical component (e.g. a =93virtual=94 =
component in gschem + pcb that allows you to legally connect the AGND =
and DGND nets.

Open to suggestions from other folks as well (I imagine this is a very =
common need =97 single-point ground in a mixed signal board).

Thanks,
James

On Mar 11, 2016, at 2:34 PM, Mike Bushroe (mbushroe AT gmail DOT com) [via =
geda-help AT delorie DOT com] <geda-help AT delorie DOT com> wrote:

> What about using a through hole jumper to perform the same function as =
the zero ohm SMD when the planes are on the surface? Assuming you have =
some freedom to place the cross connect anywhere along their boarder you =
should be able to find two spots for the through holes. I don't know if =
that would change the cost of manufacturing an otherwise all SMD board =
with only layer to layer vias, but I would think the process for making =
a top to bottom via would also make plated through holes.
>=20
>   I just know that setting up something I just HAVE to do on the very =
last run before submitting is a surefire recipe for disaster for me. I =
would rather put up with seeing the short every time I rand DRC than =
risk sending the files off to hastily.
>=20
>=20
> Mike
>=20
> On Fri, Mar 11, 2016 at 12:20 PM, Peter Clifton =
(petercjclifton AT googlemail DOT com) [via geda-help AT delorie DOT com] =
<geda-help AT delorie DOT com> wrote:
> (And be CAREFUL)... I've missed nets because of this. Be sure to make =
the short at the last possible moment.
>=20
> Peter
>=20
> On 10 March 2016 at 22:16, DJ Delorie <dj AT delorie DOT com> wrote:
>=20
> There's no change since forever for this, it's been the same all along
> - you have to manually short the two grounds as the last step in
> layout, and ignore the DRC errors for those grounds after that.
>=20
>=20
>=20
>=20
> --=20
> "Creativity is intelligence having fun." =97 Albert Einstein


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	charset=windows-1252

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">I=92m =
also hesitant to use the =93do this at the last minute=94 =
scheme.<div><br></div><div>A through hole jumper is certainly an option, =
but I was hoping for a solution that didn=92t require a physical =
component (e.g. a =93virtual=94 component in gschem + pcb that allows =
you to legally connect the AGND and DGND nets.<br><div><br><div =
apple-content-edited=3D"true">
<div style=3D"color: rgb(0, 0, 0); letter-spacing: normal; orphans: =
auto; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Open =
to suggestions from other folks as well (I imagine this is a very common =
need =97 single-point ground in a mixed signal board).</div><div =
style=3D"color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><br></div><div style=3D"color: rgb(0, 0, 0); =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;">Thanks,</div><div style=3D"color: rgb(0, 0, 0); =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;">James</div><div style=3D"color: rgb(0, 0, 0); =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><br></div></div><div><div>On Mar 11, 2016, at 2:34 =
PM, Mike Bushroe (<a =
href=3D"mailto:mbushroe AT gmail DOT com">mbushroe AT gmail DOT com</a>) [via <a =
href=3D"mailto:geda-help AT delorie DOT com">geda-help AT delorie DOT com</a>] &lt;<a =
href=3D"mailto:geda-help AT delorie DOT com">geda-help AT delorie DOT com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div dir=3D"ltr">What about using a through hole jumper to =
perform the same function as the zero ohm SMD when the planes are on the =
surface? Assuming you have some freedom to place the cross connect =
anywhere along their boarder you should be able to find two spots for =
the through holes. I don't know if that would change the cost of =
manufacturing an otherwise all SMD board with only layer to layer vias, =
but I would think the process for making a top to bottom via would also =
make plated through holes.<div><br></div><div>&nbsp; I just know that =
setting up something I just HAVE to do on the very last run before =
submitting is a surefire recipe for disaster for me. I would rather put =
up with seeing the short every time I rand DRC than risk sending the =
files off to =
hastily.</div><div><br></div><div><br></div><div>Mike</div></div><div =
class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Fri, Mar 11, =
2016 at 12:20 PM, Peter Clifton (<a =
href=3D"mailto:petercjclifton AT googlemail DOT com">petercjclifton AT googlemail DOT co=
m</a>) [via <a =
href=3D"mailto:geda-help AT delorie DOT com">geda-help AT delorie DOT com</a>] <span =
dir=3D"ltr">&lt;<a href=3D"mailto:geda-help AT delorie DOT com" =
target=3D"_blank">geda-help AT delorie DOT com</a>&gt;</span> =
wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
dir=3D"ltr"><div>(And be CAREFUL)... I've missed nets because of this. =
Be sure to make the short at the last possible =
moment.<br><br></div>Peter<br></div><div class=3D"gmail_extra"><br><div =
class=3D"gmail_quote">On 10 March 2016 at 22:16, DJ Delorie <span =
dir=3D"ltr">&lt;<a href=3D"mailto:dj AT delorie DOT com" =
target=3D"_blank">dj AT delorie DOT com</a>&gt;</span> wrote:<br><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex"><br>
There's no change since forever for this, it's been the same all =
along<br>
- you have to manually short the two grounds as the last step in<br>
layout, and ignore the DRC errors for those grounds after that.<br>
</blockquote></div><br></div>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div =
class=3D"gmail_signature"><div dir=3D"ltr"><span =
style=3D"font-family:arial,sans-serif;font-size:11pt">"Creativity is =
intelligence having fun." =97 Albert Einstein</span></div></div>
</div>
</blockquote></div><br></div></div></body></html>=

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