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Re: gEDA-user: Some footprints I tried to create
Just two thoughts for you, not about footprints, but rather about
incorporating them into the gEDA projects:
1. Although it's not (yet) mandatory, we usually suggest that
footprints use .fp as a file suffix.
2. You may be interested in looking around our website for
contributed footprints, symbols, and other materials:
http://www.gedasymbols.org/
Some other points:
> 1. Some portions of the PCB library have values associated with
> footprints, e.g. "1M" resistors and "100K" resistors, etc. I thought
> this was unnecessary. Or maybe I'm missing some vital point...
> you can tell me about it.
Nope. It is unnecessary. The footprint libraries are a grab-bag of
different footprints drawn by different people over many
years. Different people have different objectives/requirements in mind
when they draw their footprints. Also, different people have
different levels of experience. Therefore, you will see all kinds of
different practices used in the footprint libraries.
> 2. Eagle footprints are drawn using 6mil lines. I thought this was
> too thin, so I drew them using 8mil lines. (My PCB fab chap seems
> to generate really ultra-thin lines on the silkscreen with 6mil.
> YMMV.) Existing footprints with PCB seem to be drawn with all
> sorts of line thicknesses, including 10mil and 20mil, which I
> found too thick in some cases.
Yup, drawn by different people at different times. The width of
silkscreen lines is usually something *you* need to sort out with your
PCB fab house; it depends upon their manufacturing capabilities &
tolerances.
A couple of other footprint links for you, in case you haven't
found them yet:
http://geda.seul.org/wiki/geda:pcb_tips
http://www.luciani.org/geda/pcb/pcb-footprint-list.html
Stuart
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