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Oli Glaser wrote:
> I think Eagle is pretty good for libraries from what I can
> see, although someone with more experience with it (like Olin) would
> know more.

Eagle comes with lots of pre-defined parts.  However, I never use them.  I'=
m
picky about what my symbols look like, conventions for SMD pad sizing, what
the silkscreen looks like, etc.  The standard parts seem to be hastily made
without consistent conventions.  Many ICs have the schematic symbol in in
number order, for example.  Yucc!

Of course nobody else's libraries are going to adhere to my conventions for
additional information so that a BOM can be automatically generated.  I hav=
e
given this some thought and use a set of user-defined attributes for this
purpose.  A Eagle ULP (executable code that can be run in Eagle that has
access to the internal data structures) and some external code uses these
attributes to largely populate a BOM.

If anyone is using Eagle and is thinking about how to automate BOM
generation, please look at what I have available before creating yet anothe=
r
incompatible convention.  All my stuff is available for free with source
code, so it's no locking you into anything.  I have attached the EAGLE_ATTR
documentation file so you can get a feeling for how the system works.  More
details and all the code is available in the Eagle Tools release at
http://www.embedinc.com/pic/dload.htm.

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