Date: Mon, 22 Aug 2022 06:39:26 -0400
From: "Stephen C. Menasian (menasian AT ptd DOT net) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] gEDA Symbols needed
Message-ID: <20220822063926.6637b133@queeg.menasians.com>
In-Reply-To: <1a40893a-0c74-c726-8974-a67972538486@fastmail.com>
References: <1a40893a-0c74-c726-8974-a67972538486 AT fastmail DOT com>
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On Sun, 21 Aug 2022 15:09:09 -0700
"Girvin Herr (gherrl2 AT fastmail DOT com) [via geda-user AT delorie DOT com]"
<geda-user AT delorie DOT com> wrote:

> Greetings.
> 
> I am doing a documentation job and before I "roll my own", I am 
> wondering if anyone has a couple of gEDA gschem symbols (not 
> footprints!) that do not seem to be on the gedasymbols page:
> 
> AMD Am25LS2521 bus comparator
> 
> https://www.datasheetarchive.com/25ls2521-datasheet.html
> 
> National DM8136 bus comparator
> 
> https://www.digikey.com/en/products/detail/rochester-electronics-llc/DM8136N/12605592?utm_source=FindChips&utm_medium=buyNow
> 
> If anyone has these symbols and/or knows where I can find them, please 
> let me know.
> 
> Thanks.
> 
> Girvin
> 
> 
> 
Whenever I need a new symbol, I start with a similar part, either from
the geda distribution library or my private library and open that symbol
in gschem. Then, I make the desired changes (moving pins, adding pins,
deleting pins, renumbering and/or relabeling pins, device attribute,
graphical changes, etc.).  When I am happy with the result, I open the
.sym file in a text editor and clean up any straggling bits (slotdefs,
etc). If I "reload recent" the file in gschem, I ignore the "file has
changed" warning and load it anyway. The entire process takes as little
as 5 minutes for simple changes - up to 1/2 hour for a complete rework. I
always save the result to my private library - not the system libraries.

gsymcheck can help catch errors.

Stephen