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Why I wrote this program?
Well... I wanted to make a distortion pedal for my guitar, and a
guitar tuner, and an active crossover circuit for my power ampli-
fiers.
I was using gEDA and pcb for a long time, because my policy is to
use GPLed softwares all around. At work, everyone laugh at me,
why I'm using such crap stuff. Of course, I don't agree with this
statement.
In the other hand, I can see real problems with gEDA/pcb. One is
(or I hope it was!) the refdes renumbering business.
When I was starting to design my first project, the guitar tuner,
I was using a dual opamp. It was okay, I said, every time I make
some change to the layout, I had to modify the schematic too, be-
cause both two slot got a different designator by running the
refdes_renum script. I said "okay, this is for free...". In the
meantime, I was developing software for CERN, and I've found out
that the computer is for us, and it is existed to help us. At my
second project which is still ongoing, I had real pain to manual-
ly annotating everything. I've just could not live with the fact
that we have a relatively well written schematic capture, which
can't number parts.
In my head, there was already thoughts about the crossover. I use
Linkwitz-Relay filters, which consist of four opa. The final de-
sign will consist of 20-30 dual operational amplifiers. One just
can't keep track with all the slot information in a head. At that
point, I've decided to do something about it.
I was examining the source of the refdes_renum script. No, I
can't speak perl. I took my editor, and I spent two days front of
my computer, and I did the grenum program, which likely helps
solving this problem. This is written in C.
I hope You will find it useful, and I hope one day this code will
be integrated into gschem. It would be another step to full for-
ward/backward annotation of gschem and pcb.
Levente Kovacs, the author.
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