AVR-Chat

Autoroute is not magic !
You will always be able to do a better fit manually.

I don't think ANY autorouter can do better than an
experienced person routing manually.

Autoroute only, should really only be used on non-critical
boards.

/Jesper

----- Original Message ----- 
From: "Phil" <phil1960us@yahoo.com>
To: <AVR-Chat@yahoogroups.com>
Sent: Tuesday, July 06, 2004 7:17 PM
Subject: [AVR-Chat] Re: OT: Eagle 4.11 layout editor


> I find the eagle autorouter to be pretty dumb.  While you can control 
> it via a fairly complex set of options, it still makes some pretty 
> stupid decisions and will run some very circuitous traces. Also, it 
> only routes 100% for the simplest boards.  
> 
> I use autorouting to see if my placement is reasonable and then ripup 
> the routing and do it manually.   I am able to get much tighter 
> layouts and shorter average traces with manual routing.  Also, you 
> can see how to make changes in the schematic or layout to get a 
> simpler board.  Pin swap is particularly useful to simplify routing.  
> I've gotten single-sided boards where the autorouter gives up at like 
> 70%.
> 
> --- In AVR-Chat@yahoogroups.com, "Dave Miller" <dave@c...> wrote:
> > Hello,
> > 
> >  
> > 
> > The Autorouter option is only available if you have a netlist.  A 
> netlist
> > can either be imported or created when you draw the schematics.  I 
> have
> > always used Eagle to draw my schematics then create a PCB from my
> > schematics.  This will create the necessary netlist file that will 
> allow
> > autorouting.
> > 
> >  
> > 
> > Thanks,
> > 
> > Dave Miller
> > 
> > Cipherlab
> > 
> > 888.825.7713
> > 
> >  
> > 
> >  
> > 
> >   _____  
> > 
> > From: jay marante [mailto:jaythesis@y...] 
> > Sent: Tuesday, July 06, 2004 7:30 AM
> > To: AVR-chat@yahoogroups.com
> > Subject: [AVR-Chat] OT: Eagle 4.11 layout editor
> > 
> >  
> > 
> > sorry for the OT. i just don't know where to ask these questions.
> > 
> > i know a little about the eagle lay-out editor. i do manual tracing 
> of PCB.
> > but i know there is this "auto-routing" thing where the PC routes 
> the tracks
> > for you, like the protel design systems'. 
> > i don't know if i understand what i've read correctly, but, am i 
> right that
> > you can write a program (text) in eagle for all the connections or 
> the
> > components to be connected like in VHDL instead of dragging 
> components and
> > connect them yourself? if ever, how do i do that?
> > also, how do i auto-route?
> > and, how can i make a "gerber" (right spelling???) file for me to 
> download
> > it into a milling machine?
> > or maybe, can someone lead me to a tutorial site?
> > 
> > thanks for the help...
> > 
> > -jay
> > 
> >  
> > 
> > 
> >  
> > <http://us.adserver.yahoo.com/l?
> M=295196.4901138.6071305.3001176/D=groups/S=
> > :HM/A=2128215/rand=359347531>
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
>