You have to place the components on the board, then run the autorouter. It will not place components for you, thus it can not autoroute till you do so. It will put all the components that you use in your schematic, on the board page, but they will all be off to the side grouped together, yet connected by the air wires you specified in the schematic. .
I find it very useful to name all related components and name the nets in the schematic so it's easier to tell which resistor goes with which cap when you start laying out the board.
I never use "buses" in the software, I just use airwires, that get called nets. IMO a trace is a trace whether it be a bus or a net.
http://www.soundclick.com/jtsound ----- Original Message -----
From: teilhardo
To: Homebrew_PCBs@yahoogroups.com
Sent: Sunday, May 16, 2004 11:03 PM
Subject: [Homebrew_PCBs] Re: New to group and first attempt at PCB
So, if I put nets together with my components, and then switch to
layout editor, isn't the program supposed to logically come up with a
layout?
In my schematic, I connected the components together using these
"buses" and then some pop up error came up and said that they need to
be connected using nets. So I put the nets on top of the busses, is
this right? Or do I only need nets OR busses?
Thanks,
Tei
--- In Homebrew_PCBs@yahoogroups.com, "Phil" <phil1960us@y...> wrote:
> a net in eagle is a number of pins that are electically connected
> together - kind of the way you would logically think of it. It has a
> name. You dont have to actually draw them as connected. Any nets
> you name Gnd, for example, will be connected together. This is
> great for doing a schematic with out making a wiring mess in the
> drawing. I use it all the time.
>
> A bus is a set of parallel nets with a common name, say "Bus", and
> each net has a sub name - Bus1, Bus2, Bus3... Its used mainly for,
> shock!, creating busses and keeping them tidy on the schematic.
>
> --- In Homebrew_PCBs@yahoogroups.com, "Leon Heller"
> <leon_heller@h...> wrote:
> > ----- Original Message -----
> > From: "teilhardo" <teilhardo@y...>
> > To: <Homebrew_PCBs@yahoogroups.com>
> > Sent: Sunday, May 16, 2004 9:38 PM
> > Subject: [Homebrew_PCBs] Re: New to group and first attempt at PCB
> >
> >
> > > Eagle has some nice ULP's but it is sort of awkward. Does anyone
> know
> > > the difference between a "bus" and a "net"?
> >
> > With the Pulsonix software I use, a bus contains several nets.
> >
> > Leon
> > --
> > Leon Heller, G1HSM
> > http://www.geocities.com/leon_heller
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