Re: gEDA-user: boards: three more usb-gpio pods

[Rob Butts <r.butts2@xxxxxxxxx>]

   Hey DJ,
   I was just looking at your four layer boards and see that you said you
   used 13.5 mil vias.  Do you mean you did plated thru holes?
   I just did a two layer board and thought the pins from each component
   would carry the solder from the trace on one side of the board to the
   trace on the other side.  I was dearly mistaken.  I re-layed out the
   board where I had vias away from any component just to carry the
   signal from one side of the board to the other.  After drilling out
   the vias we simply put a piece of wire in the hole and soldered it on
   both sides of the board.
   How did you do the vias on your homemade board?  They look so
   professional.  My compliments!
   Thanks,
   Rob


   On Tue, Apr 21, 2009 at 4:22 PM, Wojciech Kazubski <wk0@xxxxx> wrote:

   > On Sun, 19 Apr 2009 22:30:07 -0500, Bill Gatliff wrote:
   > > Nice!  The global pulls and teardrops make for a very
   > > distinctive-looking layout.
   >
   > The look is reminiscent of my "museum" :-)
   > I pulled some pcbs from an obsolete Heinzinger high voltage supply.
   > According to the notes in copper, they were designed in the 1972.
   Must
   > have been a computer-less work flow...
   >
   > ---<(kaimartin)>---

     I remember drawing artwork in 2:1 scale with ink. The best material
     to work on
     was coated paper, usually the backside of old wall calendars (they
     were in
     price that time, but only those printed on one side!). The artwork
     was then
     copied to natural size negative by a huge camera. The minimum line
     width that
     time was about 0,5-0,6mm (20-24mils).
     Wojciech Kazubski

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