learning orcad

sudip · Mar 16, 2004

dear pals,
i've learnt orcade 'capture' and now i'm quite comfortable with
it...but while learning "layout plus" i got confused as to how to
proceed. i've made a schematic in 'capture' and i want to make its
pcb..but my schematic contains custom made parts which do not have
there footprints in orcad database...i'm unable to follow as to how to
make footprints and link them to parts...also i'm unable to understand
the logic behind netlist and pcb routing..plz guide me.
Sudip Chatterjee.

Ken Smith · Mar 16, 2004

In article <fc9ac386.0403150929.35cdfc9b@posting.google.com>,
sudip <hailsudip@yahoo.co.in> wrote:

dear pals,
[....]
it...but while learning "layout plus" i got confused as to how to
Gag

the logic behind netlist and pcb routing..plz guide me.

A net list contains three types of information:

What sort of package each part is in. EG: U101 is a SO-8

What pins a part has. EG: D101 has an ANODE and a CATHODE

What hooks to what. EG: The net we call N0001 connects D101.ANODE to
Q715.BASE.

When you load the netlist, the first thing the program must do is go find
the packages you called out. Some people call these modules. In the
ORCAD programs the patterns of copper and the pin names for the module are
bundled together.

Next the program looks to see that the pins of U101 are the same as in the
module. If not it throws a fit an reformats your hard-drive.

The last thing it does is combine the above information with the the
information about what hooks to what. At this point it is basically ready
to display a rate-nest of all of the routes.

When you start a manual route, it remembers the name of the net that you
starts on. From then on, it constantly checks to make sure that you don't
get too close to some other net and where is the nearest unconnected
section of this net. If you try to connect two nets together, it won't
allow you to do it and erases the "Program files" directory just in case.

--
--
kensmith@rahul.net forging knowledge

Spehro Pefhany · Mar 16, 2004

On Tue, 16 Mar 2004 00:26:48 +0000 (UTC), the renowned
kensmith@violet.rahul.net (Ken Smith) wrote:

In article <fc9ac386.0403150929.35cdfc9b@posting.google.com>,
sudip <hailsudip@yahoo.co.in> wrote:
dear pals,
[....]
it...but while learning "layout plus" i got confused as to how to
Gag

the logic behind netlist and pcb routing..plz guide me.

A net list contains three types of information:

What sort of package each part is in. EG: U101 is a SO-8

What pins a part has. EG: D101 has an ANODE and a CATHODE

What hooks to what. EG: The net we call N0001 connects D101.ANODE to
Q715.BASE.

When you load the netlist, the first thing the program must do is go find
the packages you called out. Some people call these modules. In the
ORCAD programs the patterns of copper and the pin names for the module are
bundled together.

Next the program looks to see that the pins of U101 are the same as in the
module. If not it throws a fit an reformats your hard-drive.

The last thing it does is combine the above information with the the
information about what hooks to what. At this point it is basically ready
to display a rate-nest of all of the routes.

When you start a manual route, it remembers the name of the net that you
starts on. From then on, it constantly checks to make sure that you don't
get too close to some other net and where is the nearest unconnected
section of this net. If you try to connect two nets together, it won't
allow you to do it and erases the "Program files" directory just in case.

<ROTFL>

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

Jim Thompson · Mar 16, 2004

On Tue, 16 Mar 2004 01:01:08 GMT, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

On Tue, 16 Mar 2004 00:26:48 +0000 (UTC), the renowned
kensmith@violet.rahul.net (Ken Smith) wrote:
[snip]

Next the program looks to see that the pins of U101 are the same as in the
module. If not it throws a fit an reformats your hard-drive.

[snip]

When you start a manual route, it remembers the name of the net that you
starts on. From then on, it constantly checks to make sure that you don't
get too close to some other net and where is the nearest unconnected
section of this net. If you try to connect two nets together, it won't
allow you to do it and erases the "Program files" directory just in case.

ROTFL

Best regards,
Spehro Pefhany

480)460-2350 | |
| E-mail Address at Website Fax

qrk · Mar 16, 2004

On Mon, 15 Mar 2004 18:10:51 -0700, Jim Thompson
<thegreatone@example.com> wrote:

On Tue, 16 Mar 2004 01:01:08 GMT, Spehro Pefhany
speffSNIP@interlogDOTyou.knowwhat> wrote:

On Tue, 16 Mar 2004 00:26:48 +0000 (UTC), the renowned
kensmith@violet.rahul.net (Ken Smith) wrote:
[snip]

Next the program looks to see that the pins of U101 are the same as in the
module. If not it throws a fit an reformats your hard-drive.

[snip]

When you start a manual route, it remembers the name of the net that you
starts on. From then on, it constantly checks to make sure that you don't
get too close to some other net and where is the nearest unconnected
section of this net. If you try to connect two nets together, it won't
allow you to do it and erases the "Program files" directory just in case.

ROTFL

Best regards,
Spehro Pefhany

Why are you laughing, Spehro? That's what OrCAD really does ;-)

...Jim Thompson

Come on! Ken is exaggerating. The worst Orcad Layout does is bugger
the file your working on, at least once per day.

Mark

Spehro Pefhany · Mar 16, 2004

On Mon, 15 Mar 2004 19:54:53 -0800, the renowned qrk
<mark@reson.DELETE.ME.com> wrote:

On Mon, 15 Mar 2004 18:10:51 -0700, Jim Thompson
thegreatone@example.com> wrote:

On Tue, 16 Mar 2004 01:01:08 GMT, Spehro Pefhany
speffSNIP@interlogDOTyou.knowwhat> wrote:

On Tue, 16 Mar 2004 00:26:48 +0000 (UTC), the renowned
kensmith@violet.rahul.net (Ken Smith) wrote:
[snip]

Next the program looks to see that the pins of U101 are the same as in the
module. If not it throws a fit an reformats your hard-drive.

[snip]

When you start a manual route, it remembers the name of the net that you
starts on. From then on, it constantly checks to make sure that you don't
get too close to some other net and where is the nearest unconnected
section of this net. If you try to connect two nets together, it won't
allow you to do it and erases the "Program files" directory just in case.

ROTFL

Best regards,
Spehro Pefhany

Why are you laughing, Spehro? That's what OrCAD really does ;-)

...Jim Thompson

Come on! Ken is exaggerating. The worst Orcad Layout does is bugger
the file your working on, at least once per day.

Mark

And it's still better than Protel...

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

Teddy · Mar 16, 2004

In Layout, open a .max file. You will then have access to the library
manager. Open that from the file menu. Orcad recommends creating a
new library for your custom parts. That way if you upgrade, the
existing libraries will be overwritten but your custom library will
not. You create new parts from the library manager.

Before creating and importing your netlist, make sure that the
footprint names in Capture match the footprint names in Layout.
That is all you need to do to link the footprints.

Tom

On 15 Mar 2004 09:29:44 -0800, hailsudip@yahoo.co.in (sudip) wrote:

dear pals,
i've learnt orcade 'capture' and now i'm quite comfortable with
it...but while learning "layout plus" i got confused as to how to
proceed. i've made a schematic in 'capture' and i want to make its
pcb..but my schematic contains custom made parts which do not have
there footprints in orcad database...i'm unable to follow as to how to
make footprints and link them to parts...also i'm unable to understand
the logic behind netlist and pcb routing..plz guide me.
Sudip Chatterjee.

Ken Smith · Mar 17, 2004

In article <58uc50hjai9n5fqhdd1kepibao84rh2m4b@4ax.com>,
qrk <mark@reson.DELETE.ME.com> wrote:
[...]

Come on! Ken is exaggerating. The worst Orcad Layout does is bugger
the file your working on, at least once per day.

You're thinking of Capture, not the layout program.

The DOS schematic program from Orcad was the best thing they ever made.

Capture would mung the drawing hooking every pin to every other pin.

The extended DOS PCB program would delete traces in one part of the board
while you were adding them in another. Someone at Orcad found a work
around for this so they fired him.

Since the experience with Orcad PCB, we have used PADS-2K.

--
--
kensmith@rahul.net forging knowledge

Spehro Pefhany · Mar 17, 2004

On Wed, 17 Mar 2004 00:35:42 +0000 (UTC), the renowned
kensmith@violet.rahul.net (Ken Smith) wrote:

In article <58uc50hjai9n5fqhdd1kepibao84rh2m4b@4ax.com>,
qrk <mark@reson.DELETE.ME.com> wrote:
[...]
Come on! Ken is exaggerating. The worst Orcad Layout does is bugger
the file your working on, at least once per day.

You're thinking of Capture, not the layout program.

The DOS schematic program from Orcad was the best thing they ever made.

Capture would mung the drawing hooking every pin to every other pin.

Well, generally only if you go moving stuff..

The extended DOS PCB program would delete traces in one part of the board
while you were adding them in another. Someone at Orcad found a work
around for this so they fired him.

Fascinating. I returned the DOS PCB program and (after months of
wrangling) got our thousands of dollars back. It locked up and nobody
could find a way to salvage the file. The board had about 20-20 parts
on it, a real toughy, that could have been taped up in a few hours.

Since the experience with Orcad PCB, we have used PADS-2K.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

Boris Mohar · Mar 17, 2004

On Wed, 17 Mar 2004 00:35:42 +0000 (UTC), kensmith@violet.rahul.net (Ken
Smith) wrote:

In article <58uc50hjai9n5fqhdd1kepibao84rh2m4b@4ax.com>,
qrk <mark@reson.DELETE.ME.com> wrote:
[...]
Come on! Ken is exaggerating. The worst Orcad Layout does is bugger
the file your working on, at least once per day.

You're thinking of Capture, not the layout program.

The DOS schematic program from Orcad was the best thing they ever made.

Capture would mung the drawing hooking every pin to every other pin.

The extended DOS PCB program would delete traces in one part of the board
while you were adding them in another. Someone at Orcad found a work
around for this so they fired him.

Since the experience with Orcad PCB, we have used PADS-2K.

You must be talking about Orcad PCB ll which was most horrible peace of
crap in this current universe. I had to learn how to use that. When Orcad
finally scrapped it they released PCB386 in its place. Alas it was not fully
debugged and users were pissed. Bad first impressions for a program that
showed a lot of potential.. I was one of beta testers and saw it go through
number of revisions to the latest ver. 2.22 which is very good. I use it to
this day to layout some very complex multilayer boards with huge BGA chips on
both sides. Under Windows 98 I can have more than one instance open. Orcad
Capture produces EDIF netlist for it. No problems there although someone
who is responsible for Capture should be punched in the nose but that is
another matter.

Layout? I don't want to talk about it.

Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs http://www3.sympatico.ca/borism/

void _-void-_ in the obvious place

qrk · Mar 17, 2004

On Wed, 17 Mar 2004 00:35:42 +0000 (UTC), kensmith@violet.rahul.net
(Ken Smith) wrote:

In article <58uc50hjai9n5fqhdd1kepibao84rh2m4b@4ax.com>,
qrk <mark@reson.DELETE.ME.com> wrote:
[...]
Come on! Ken is exaggerating. The worst Orcad Layout does is bugger
the file your working on, at least once per day.

You're thinking of Capture, not the layout program.

The DOS schematic program from Orcad was the best thing they ever made.

That's why I still use it.

Capture would mung the drawing hooking every pin to every other pin.

The extended DOS PCB program would delete traces in one part of the board
while you were adding them in another. Someone at Orcad found a work
around for this so they fired him.

Since the experience with Orcad PCB, we have used PADS-2K.

I'm thinking of Layout when it comes to buggering your max file. Just
had it happen yesterday. I don't use Capture, can't deal with
crash-ware while designing. Still using SDT 386+ with a slightly
modified library composer (allows one to stack pins on each other -
handy for power and ground pins). You should see the latest errata
sheet on Layout 10. About 100 issues corrected in SP1.

Mark

Ken Smith · Mar 17, 2004

In article <kmcf501l9g566q0lnu0v34bo8n7pbjamug@4ax.com>,
Boris Mohar <borism_-void-_@sympatico.ca> wrote:
[... my Orcad horror story ....]

You must be talking about Orcad PCB ll which was most horrible peace of
crap in this current universe.

IMHO: PCB386 was the most horrible peace of crap in the universe. PCB-II
was merely bad.

--
--
kensmith@rahul.net forging knowledge

Active8 · Mar 19, 2004

On Tue, 16 Mar 2004 07:14:40 -0600, Teddy wrote:

In Layout, open a .max file. You will then have access to the library
manager. Open that from the file menu. Orcad recommends creating a
new library for your custom parts. That way if you upgrade, the
existing libraries will be overwritten but your custom library will
not. You create new parts from the library manager.

You can also open the library mgr from the session frame.

Before creating and importing your netlist, make sure that the
footprint names in Capture match the footprint names in Layout.
That is all you need to do to link the footprints.

sometimes, perhaps I've managed to tell layout about my custom
library, when you ECO to layout, Layout reports that it can't find
the footprint and give you the option to point to it.

Speaking of ECO... In capture, after you've assigned your footprints
to the parts, you go to tools | create netlist or whatever and go to
the layout tab and set all that crap. Select Auto ECO to Layout.
Layout will ask for the tech file and board file and all that's
another story if you already have a board fab drawing started and
the manuals suck about as bad as I'm starting to suck explaining all
this twisted, convoluted proceedure.

Getting back to the footprints, what you want to do in library
manager is pick a part similar to what you want and click "save as".
Type in the name you want and look for the "new library" or whatever
thing down there by the library list box, IIRC.

Then just to be careful, close library manager and reopen it. Select
your new library and the part you just saved and modify the thing.
Alternately, you can create a new part from scratch.

Tom

On 15 Mar 2004 09:29:44 -0800, hailsudip@yahoo.co.in (sudip) wrote:

dear pals,
i've learnt orcade 'capture' and now i'm quite comfortable with
it...but while learning "layout plus" i got confused as to how to
proceed. i've made a schematic in 'capture' and i want to make its
pcb..but my schematic contains custom made parts which do not have
there footprints in orcad database...i'm unable to follow as to how to
make footprints and link them to parts...also i'm unable to understand
the logic behind netlist and pcb routing..plz guide me.
Sudip Chatterjee.

--
Best Regards,
Mike

learning orcad

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