Homebrew PCBs

Been laying out circuits for 40 years.  As a general statement, autorouting
doesn't take on much meaning to me until circuit complexity and/or component
positions are dominant. ( Retired now, doing mostly analog, data acquisition
just for fun) Even then, recognize that autorouting is only a tool toward a
solution, it is not the solution itself.  Before autorouting, a number of
tricks or procedures were utilized to expidite board layout. (increase
number of layers, run horiz on 1 layer vert on another, power bus bars,
etc)  With traces being used for more than just signal delivery these days
(delay lines, etc) autorouting becomes a study all by itself.

On Sat, Oct 10, 2009 at 10:20 AM, sailingto <sailingtoo@...> wrote:

>
>
> I'm sure glad to hear that I'm not the only person who doesn't like
> auto-routing. It just doesn't go where I want, and when I try to clean up
> the rat's nest of traces it seems to take longer than manually routing from
> the start.
>
> 73 de Ken H>
>
> --- In Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>,
> Barry Demers <sdad@...> wrote:
> >
> > Not very long ago I was in same situation as you. I needed single sided
> > boards. Beyond that, sometimes you need specific traces on specific side
> of
> > board. So how is that done? Read and experiment with layers and lines.
> > All objects, including traces have properties and layer is one of those
> > properties. In general, you can change properties at will, and you can
> move
> > traces around at will. For my single side boards I started with the rat's
> > nest and kept moving things around I had as few lines as possible
> crossing
> > each other. Using that positioning as a guide I then started introducing
> > traces until I was satisfied. Really is fun! A lot like a labyrinth
> > puzzle.
> > Autorouting created a mess, especially when you start to edit the
> autorouted
> > traces, because you now have to start paying attention to signal id
> > number's, etc being altered
> >
> > On Sat, Oct 10, 2009 at 2:33 AM, Stefan Trethan <stefan_trethan@
> ...>wrote:
> >
> > >
> > >
> > > You are trying to run before you can walk, learn to manually route!
> > >
> > > Autorouters won't give decent results anyway.
> > >
> > > ST
> > >
> > > On Fri, Oct 9, 2009 at 9:39 PM, AD5VJ Bob <rtnmi@...<rtnmi%
> 40sbcglobal.net>>
> > > wrote:
> > > > I downloaded and am trying to use Eagle CAD program for my first
> board. I
> > > went to
> > > > http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=109and
> > > did the little tutorial they have there for a serial to USB
> > > > adapter since it looked pretty simple and the free Eagle will handle
> > > small stuff.
> > > >
> > > > The problem I am having is in the board layout. I am wanting to do
> this
> > > board as a single sided board and eagle keeps auto routing
> > > > as a double sided board.
> > > >
> > > > I have looked into the help file and can not find out how to tell
> eagle I
> > > want a single sided board layout. It doesn't seem to be to
> > > > intuitive so I am thinking there is a setting somewhere to do this,
> but
> > > where?
> > > >
> > > > Does anyone use Eagle who can help me out with this?
> > > >
> > > > Bob AD5VJ
> > > >
> > > >
> > >
> > >
> >
> >
> >
> > --
> > Thank you,
> >
> > Barry
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>  
>



-- 
Thank you,

Barry


[Non-text portions of this message have been removed]