[sdiy] ASM1-VCO Problem

[Don Tillman]

   > Date: Fri, 22 Aug 2003 01:22:45 +0200 (CEST)
   > From: Magnus Danielson <cfmd at swipnet.se>
   > 
   > Interestingly, I have yeat to see a schematic CAD that works as
   > well on layouting symbols as well as the stuff I cooked up in
   > Postscript some 5-6 years ago. Actually that is more of a
   > disapointment than a lame attempt to boost my morale 

Gee Magnus, I thought you'd like my QuadTrap schematics?

   http://www.till.com/articles/QuadTrapVCO/vcocore.html

:-)

(For folks who don't know, Magnus and I have very similar opinions on
the tools we use.)

I haven't mentioned it before, but part of my QuadTrap article is an
experiment in DIY schematic drawing.  The schematics there are
*exactly* the way I want them -- the part symbols, the fonts, the
wires, the drawing rules, the sizes, the spacings, the notations, the
anti-aliasing... all that is hand-tweaked.

I used to to do schematics in raw PostScript, but it got too messy for
complex drawings and I didn't like the anti-aliasing that PhotoShop's
PostScript implementation provides.

So for the above schematics I used a collection of drawing routines I
wrote in Java with the Java2D package.  The Java2D package is
basically PostScript implemented in Java, except that it's more
powerful than PostScript and Java is a more powerful language than
PostScript.

So it turns out that the main QuadTrap schematic is about 10 pages of
Java code, and my schematic drawing package is about 13 pages of Java
code.  It's not huge.

  -- Don

-- 
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com