Re: gEDA-user: gEDA on windows

["Mark Rages" <markrages@xxxxxxxxx>]

On Mon, Jan 12, 2009 at 3:00 PM, Joerg <joergsch@xxxxxxxxxxxxxxxxxxxxx> wrote:
> Mark Rages wrote:
>> On Mon, Jan 12, 2009 at 1:36 PM, Joerg <joergsch@xxxxxxxxxxxxxxxxxxxxx> wrote:
>>> John Doty wrote:
>>>
>>> Ok, I'll try, it's been a long time since I tested it:
>>>
>>> Take the LM324 as an example. It is a chip with four opamps in there:
>>> http://www.national.com/ds/LM/LM124.pdf
>>>
>>> When you place the first instantation it'll be pins 1,2,3, the next one
>>> 5,6,7 and so on. But all are supplied via the common supply pins 4 and
>>> 11. In gschem you only have two choices. Either you create a library
>>> model that repeats those pins 4 and 11 visibly for all four
>>> instantations or you create the library part with the power pins
>>> detached where none of the instantations show power pins. This can be
>>> practical for auto-connecting digital stuff to a VCC rail but it doesn't
>>> work well in the analog world. Now you could also have pins 11 and 4 as
>>> a separate "fifth" device. Anyhow, neither method looks professional,
>>> neither is industry practice, and all make schematics more difficult to
>>> understand for others. Especially for non-analog guys.
>>>
>>
>> You can always use two symbols, one with power pins and one without.
>> That's what I do.
>>
>
> But if you do that, can you call the first one U12A and have power pins,
> then next one U12B, then U12C and U12D without but so it sticks during
> renumbering and also correctly netlists? When I tried that the refdeses
> were messed up at the next renumbering.
>

It netlists OK if the refdes's are the same.  I leave the identifiers
as "U1a U1b" etc, then strip the suffixes with a script during
netlisting.

I don't use automatic renumbering.

Regards,
Mark
markrages@gmail
-- 
Mark Rages, Engineer
Midwest Telecine LLC
markrages@xxxxxxxxxxxxxxxxxxx


_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user