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Mail Archives: geda-user/2016/02/28/16:00:25

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Subject: Re: [geda-user] pcb import --> Symbol heavifier
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From: John Doty <jpd AT noqsi DOT com>
In-Reply-To: <20160228211220.2042e36fa5dcca51062a40ea@gmail.com>
Date: Sun, 28 Feb 2016 14:00:06 -0700
Message-Id: <D1E8415E-11EF-434B-B857-E2C1A47CB99D@noqsi.com>
References: <20160215215221 DOT fd472794e7b9446a243bfc40 AT gmail DOT com> <20160216081722 DOT 1065cbed6653d3da4ffc7498 AT gmail DOT com> <201602160724 DOT u1G7Ox26001785 AT envy DOT delorie DOT com> <20160216085628 DOT b70143c330cd4da98a4603d3 AT gmail DOT com> <201602160805 DOT u1G85d8c003148 AT envy DOT delorie DOT com> <20160216092912 DOT 7f7439f703b49175a21dbb1b AT gmail DOT com> <CAJXU7q_w5NunkojiCr36RHRTq0hJ+PZP1e0GumTRMoGXcvgRXQ AT mail DOT gmail DOT com> <201602161715 DOT u1GHFMBB028078 AT envy DOT delorie DOT com> <CAC4O8c9jr_b376SpuUk5HrJApP1c75oxsEBemn-i_xtC-rt-Zw AT mail DOT gmail DOT com> <201602162032 DOT u1GKWL7Y005291 AT envy DOT delorie DOT com> <CAC4O8c-ig=0UVAqagNXH_DBmC9uVQDu3Y1Gx7LBGmRCo0-_kVQ AT mail DOT gmail DOT com> <E75ECBB6-14E7-437A-B374-E0CF86BDFF1A AT noqsi DOT com> <CAC4O8c8z4JiJr=mgA+co4pX-yxu_pVsXpeKRYqneuxZNnYqh8g AT mail DOT gmail DOT com> <CAC4O8c8ejSN3GrmB1Zw=Dx9Pm-3Y0jwjNs=yjmwgsqcoVW5ACw AT mail DOT gmail DOT com> <59CE9019-7A56-49D6-BC2B-680A7253B055 AT noqsi DOT com> <nauuv2$m6r$1 AT ger DOT gmane DOT org> <20160228153707 DOT 6ca09160d8b85ac77357302b AT gmail DOT com> <87h9gsycrl DOT fsf AT rover DOT gag DOT com> <20160228211220.2042e36fa5!
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On Feb 28, 2016, at 1:12 PM, Nicklas Karlsson =
(nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com] =
<geda-user AT delorie DOT com> wrote:

>>> A BOM generator which automatically heavify symbols with ordering
>>> information is what I ultimately want to write. Of course there have
>>> to be a database with values to pick from.
>>=20
>> Keith and I recently put something like this together for Altus =
Metrum.
>>=20
>> We now, by default, only set three attributes on a part: 'device',
>> 'footprint', and 'value'.  We have a "preferred parts" database =
that's
>> just a tab-separated-values flat file, and a couple awk scripts that
>> take the attributes for each part in a csv file, use the triplet =
above
>> to index into the database, and fill in any missing attributes.
>>=20
>> This means that for almost all parts, we only have one place to =
update
>> when we change manufacturer part data or vendor info for our =
'preferred
>> parts', yet we can override any attribute we need to on a per-design
>> basis. ...
>=20
> In particular there will be no need to update schematic then there are =
no changes to schematic.
>=20
> This is particularly useful if there is a need for distributor part =
number.
>=20
>=20
> Nicklas Karlsson
>=20

What I do is to make a key from four attributes: device, value, spec, =
and footprint. Spec is something like =9350WVDC X7R=94 or =931% 1/10W=94. =
Together, these form a sufficiently unique key to identify a part.

But it gets tricky then, because there are generally separate =
organizations involved with their own approaches. The folks who order =
parts will have a =93database=94 (really a spreadsheet) of approved =
parts. The board assembly house will have their own form they want. So, =
I have to customize the scripts frequently. One project has used three =
different layout shops and four different assembly shops for different =
phases.

John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd AT noqsi DOT com



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