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Re: gEDA-user: Creating bill of materials?
On 8/23/2011 12:16 PM, John Doty wrote:
What if the components are in 38 separate schematic files, as in one
recent project of mine? The project-specific component approach makes
managing this pretty easy. You can even switch project component
libraries to change components from prototype to production without
changing schematics. All properties the same is not a reliable
indicator that the components have similar roles. Sometimes I have
strong pressures to keep the parts list short, so I'll choose
general-purpose components and use them in multiple roles. Other
times, I'm optimizing more. With project evolution and design reuse,
these scenarios can become very entangled. John Doty Noqsi Aerospace,
Ltd. http://www.noqsi.com/ jpd@xxxxxxxxx
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gattrib_csv will operate on multiple files at the same time. The
project which required the development of gattrib_csv spans 23 sheets.
I reference them collectively using sheet*.sch. As for grouping of the
components, gattrib_csv has a --filter option which then specifies which
attributes to include in the export. By selectivly restricting which
attributes are exported, I have used gattrib_csv very effectively to
group and manage project's components. Such as when I adding
footprints, I include manf_p/n and footprint. In this way I am using
manf_p/n as a key and footprint as a data value almost as if it were a
database query. The key value concept of grouping spans symbol types as
it groups all chips of a given type even if they are used with different
symbols (slotted or blocked) while at the same time respecting the
differences between different chips made out of the same symbol
(resistor pack of 8).
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