On Thu, Feb 12, 2009 at 8:43 PM, Dan McMahill wrote:
> What do you have in mind? What should the calculations provide? How
> would you want to access them?
I have a range of things on my wish list. I originally thought it
would be best to include at least the first few of these in PCB
(ctrl-R
Jeffrey Gregory wrote:
> Are there any plans to add trace impedance calculations to PCB? If
> not, is there an argument against it or just that no one has time and
> interest? What alternatives do people use?
>
> Best Regards,
> Jeff
depends a little on what you want. If you want to know what
On Thu, Feb 12, 2009 at 9:17 PM, Yamazaki R2 wrote:
>
> Hi all,
> Over the past few weeks Ive been slowly working on a hierarchical
> netlister wrapper program that uses gnetlist to make a true
> hierarchical spice netlist.
This is a great news.
> It has a lot of missing features that
On Thu, 2009-02-12 at 13:17 -0800, Yamazaki R2 wrote:
> Hi all,
>Over the past few weeks Ive been slowly working on a hierarchical
>netlister wrapper program that uses gnetlist to make a true
>hierarchical spice netlist. It has a lot of missing features that I
>want to have soon and
Hi all,
Over the past few weeks Ive been slowly working on a hierarchical
netlister wrapper program that uses gnetlist to make a true
hierarchical spice netlist. It has a lot of missing features that I
want to have soon and requires some things from the gschem schematics
to prope
On Thu, 2009-02-12 at 11:10 -0800, Ben Jackson wrote:
> What I really want to do is implement my "tetris" plugin idea which feeds
> you the elements in a "natural" order for you to place.
Oohhh ;-)
Bdale
___
geda-user mailing list
geda
with the PCB, as stackup information
On Feb 12, 2009, at 11:48 AM, KURT PETERS wrote:
>
> It would be nice to have some defaults already in place like the
> permittivity for FR4 and standard layer thicknesses built-in for the
> user. Metal thicknesses and materials are also pretty standar
It would be nice to have some defaults already in place like the
permittivity for FR4 and standard layer thicknesses built-in for the
user. Metal thicknesses and materials are also pretty standard. A
more sophisticated user might have to enter in his own parameters.
Additionally,
On Thu, Feb 12, 2009 at 02:35:51AM -0500, gene wrote:
> I have a large board, around 3000 components. It's hierarchical so the
> refdes's are long and sometimes obscures the little parts.
First off, if you are placing that many components you'll want to make
sure your elements have the refdes's
On Thu, Feb 12, 2009 at 1:41 PM, Gabriel Paubert wrote:
>> As Joe pointed out too, PCB doesn't not know about the metal layer
>> separation distance, nor does it know the dielectric constant of your
>> insulating material. Therefore, it cannot do impedance calcs.
Obviously this would have to be
On Thu, Feb 12, 2009 at 01:27:37PM -0500, Stuart Brorson wrote:
> > Are there any plans to add trace impedance calculations to PCB? If
> > not, is there an argument against it or just that no one has time and
> > interest? What alternatives do people use?
>
> As Joe pointed out too, PCB doesn't
On Feb 12, 2009, at 10:27 AM, Stuart Brorson wrote:
>> Are there any plans to add trace impedance calculations to PCB? If
>> not, is there an argument against it or just that no one has time and
>> interest? What alternatives do people use?
>
> As Joe pointed out too, PCB doesn't not know about
> As Joe pointed out too, PCB doesn't not know about the metal layer
> separation distance
Ugh. Stupid typo.
s/doesn't not know/doesn't know/
Stuart
___
geda-user mailing list
geda-user@moria.seul.org
http://www.seul.org/cgi-bin/mailman/listinfo
> Are there any plans to add trace impedance calculations to PCB? If
> not, is there an argument against it or just that no one has time and
> interest? What alternatives do people use?
As Joe pointed out too, PCB doesn't not know about the metal layer
separation distance, nor does it know the d
On Thursday 12 February 2009, Edward Hennessy wrote:
> Is there a field solver that could be used?
I know about Fastcap and Fasthenry .. from MIT I think.
There's also "atlc".
http://atlc.sourceforge.net/
There are simple formulas that work for some cases. If you
don't want to model coupling,
On Feb 12, 2009, at 9:06 AM, al davis wrote:
>
> That is one of the reasons we need a translator system that
> (among others) will translate a PCB to a netlist format. When
> that happens, Gnucap is ready to do a full SI simulation,
> including IBIS. ... and of course trace impedance.
Is there
> I can't find a setting for 'zoom selected', which would be really
> good for zeroing on the selected part.
Adding that wouldn't be too hard, but you'd have to do it inside the
GUI hids.
*Scrolling* to the selected part would be easier, and could be done as
a plugin. Compare with my findrat pl
I generally do this kind of analysis separate from my layout tool (PCB
or whatever) because many of the other parameters needed for the
calculation are not usually tracked or updated by the layout tool
(dielectric constant, dielectric thickness, stackup, copper thickness,
distance from external con
Take a look at:
http://sourceforge.net/project/screenshots.php?group_id=201957
I think it would be cool to be able to select a couple of traces from
pcb and insert their info into an application like the above. perhaps
have some code that would follow the traces and every time one of the
traces,
On Thursday 12 February 2009, Jeffrey Gregory wrote:
> Are there any plans to add trace impedance calculations to
> PCB? If not, is there an argument against it or just that no
> one has time and interest? What alternatives do people use?
Nobody who knows how has stepped up to do it.
That is on
Jeffrey Gregory wrote:
> Are there any plans to add trace impedance calculations to PCB?
Not concrete ones yet that I've heard.
If not, is there an argument against it or just that no one has time
Time, the avenger.
What alternatives do people use?
Some pcb action commands can get you a per
gene wrote:
> Peter Clifton wrote:
>> PCB has a (IMO mis-)feature, where if you click on a net / pin in the
>> netlist window, it will jump your mouse pointer to the pin location.
.
.
.
So, what if I:
> 1) Go find all Element lines containing the substring "S6/S307"
> 2) Edit the location attribute
Are there any plans to add trace impedance calculations to PCB? If
not, is there an argument against it or just that no one has time and
interest? What alternatives do people use?
Best Regards,
Jeff
___
geda-user mailing list
geda-user@moria.seul.org
On Wed, 2009-02-11 at 19:31 -0500, DJ Delorie wrote:
>
> One option is to run pcb under gdb. When it hangs, hit Ctrl-C in the
> gdb window and type "where" to see where it's hung.
I started trying to use 'gdb' when I found that other applications where
having similar hang problems when doing file
Peter Clifton wrote:
> PCB has a (IMO mis-)feature, where if you click on a net / pin in the
> netlist window, it will jump your mouse pointer to the pin location.
>
> Perhaps (if you know what net your desired component is on), you could
> find it in the netlist window and jump to it that way.
>
On Thu, 2009-02-12 at 02:35 -0500, gene wrote:
> I have a large board, around 3000 components. It's hierarchical so the
> refdes's are long and sometimes obscures the little parts. Some of the
> devices are 0603, so they are pretty small in a large sea of dispersed
> parts. I can't easily fin
Welcome ... they are all good ones, but I like the one Steve
suggested the best.
On Wednesday 11 February 2009, Aanjhan R wrote:
> 1. Usability improvements for ngspice/Gnucap - Under gaf
There is certainly lots of room for improvement, but I must warn
you that there have been lots of failed
Peter Clifton wrote:
> Did you use the "master" branch of my repository, rather then the
> "before_pours" one?
>
D'oh. It's the instruction reading blind spot again.
Gareth
Worlds worst alpha tester.
___
geda-user mailing list
geda-user@moria.seul.o
28 matches
Mail list logo
