Macintosh PCB Software FREE Re: [sdiy] Schematic to PCBproblems

[Theo]

From: harry <harrybissell at prodigy.net>

<snip>
>
> AND... I note that your autorouter example 'is' digital.
No it was not, I just suggested that one should better learn using a
Autorouter for digital stuff first.

>I did admit that
> the autorouters would do OK for that (at least at very low speeds).
>
> Might note that for very HIGH speed designs the advanced cad tools
> would be a necessity as well...
>
If you consider 32Mhz very HIGH speed then yes...
But the problems are the same doesn't matter if you route by hand or
automatic.
Some modern routers can take "advanced" things like trace lenkt into the
game.

> The autorouters ARE faster, and many board houses use them. I usually
> LOATHE their results. They are in the business to make money... I like to
> make ART !
>
Yep agreed, think of a autorouter as a sample loop CD.
Useful for quick results and inspiration, but its not thing like _playing_
music your self.

<snip>
> H^) harry
>
> ps you're not gonna tell them about the .jpgs on my HD are you ???  ;^P
>
Already got those from a.b.p.e.exwives... 8^)

Theo


> Theo wrote:
>
> > Ok Harry here you go ;^)
> >
> > Auto routing can save you lots a time and can make great dual sided
PCBs.
> > BUT the process is not as automatic as the name suggest.
> > Fist off you _have_ to do the power structure by hand.
> > After that the autorouter can help you with routing selected nets
between
> > selected components.
> >
> > Most obvious place to start using the autorouter is for data and address
> > busses.
> > Don't over do it, 2 or 3 ICs at the time is the way to go.
> > When you got the feel for it, you can start using it on strategic parts
of
> > analogue circuits.
> > Usually  I end up shoving the traces the autorouter did,
> > often you can reduce a via or 2 (make that 10) and make place for
> > "unroutable" traces.

<snip>