Homebrew PCBs

Hi all.
  Does anyone know how to make Eagle make bigger vias? Someone 
pointed out a ULP script within Eacgle that allows you to chang the 
diameter of the insides of vias, but I need to change the outside 
diameters.  (probably right in front of me).
  Also, I have an RF project that I'm building, and I need the bottom 
side of the board to be all copper ground plane, except where traces 
run.  Does anyone know how to get Eagle to do this?

Thanks

Josh

draw your polygon with the poly tool, name it gnd (or what ever name 
you are using for ground) then route. You will see traces run though 
the poly. I've never liked how the resulting traces looked in the gnd 
poly so I've not made a board that way.

you can increase the size of a via by changing the drill size but 
that leaves the narrow pad.  Its not immediately obvious how to get a 
big "pad" and small drill for via.

--- In Homebrew_PCBs@yahoogroups.com, "joshdewinter" 
<joshdewinter@y...> wrote:
> Hi all.
>   Does anyone know how to make Eagle make bigger vias? Someone 
> pointed out a ULP script within Eacgle that allows you to chang the 
> diameter of the insides of vias, but I need to change the outside 
> diameters.  (probably right in front of me).
>   Also, I have an RF project that I'm building, and I need the 
bottom 
> side of the board to be all copper ground plane, except where 
traces 

> run.  Does anyone know how to get Eagle to do this?
> 
> Thanks
> 
> Josh

For new vias use the via command. You get a toolbar that allows you
select the drill size and pad diameter. If the size you want is not
there you can type it into the list box.
If the via already exists you can change it with the change drill and
change diameter commands. Again  you can specify the size you want as
a command parameter. Click on the via to change.
--- In Homebrew_PCBs@yahoogroups.com, "joshdewinter"
<joshdewinter@y...> wrote:
> Hi all.
>   Does anyone know how to make Eagle make bigger vias? Someone 
> pointed out a ULP script within Eacgle that allows you to chang the 
> diameter of the insides of vias, but I need to change the outside 
> diameters.  (probably right in front of me).
>   Also, I have an RF project that I'm building, and I need the
bottom 
> side of the board to be all copper ground plane, except where
traces 

> run.  Does anyone know how to get Eagle to do this?
> 
> Thanks
> 
> Josh

--- In Homebrew_PCBs@yahoogroups.com, "Phil" <phil1960us@y...> wrote:

Using the display function, deselect all layers except vias, leaving 
the via layer as the only layer showing.  Use the group function and 
drag the entire set of vias. Now select the drill size and right-
click the group area.  All vias will have the newly selected drill 
size.  Now select diameter and select the diameter you want.  Right-
click again and the vias now have the annular ring AND drill size you 
want.  Note that if you leave diameter at "auto", you will get the 
annular ring that Eagle defaults to.  You may have to try several 
diameter changes to get the size you want, but this is easy (one 
click) to try.

Hope this helps,

Rusty


> draw your polygon with the poly tool, name it gnd (or what ever 
name 
> you are using for ground) then route. You will see traces run 
though 
> the poly. I've never liked how the resulting traces looked in the 
gnd 
> poly so I've not made a board that way.
> 
> you can increase the size of a via by changing the drill size but 
> that leaves the narrow pad.  Its not immediately obvious how to get 
a 
> big "pad" and small drill for via.
> 
> --- In Homebrew_PCBs@yahoogroups.com, "joshdewinter" 
> <joshdewinter@y...> wrote:
> > Hi all.
> >   Does anyone know how to make Eagle make bigger vias? Someone 
> > pointed out a ULP script within Eacgle that allows you to chang 
the 

> > diameter of the insides of vias, but I need to change the outside 
> > diameters.  (probably right in front of me).
> >   Also, I have an RF project that I'm building, and I need the 
> bottom 
> > side of the board to be all copper ground plane, except where 
> traces 
> > run.  Does anyone know how to get Eagle to do this?
> > 
> > Thanks
> > 
> > Josh