PSPICE LAYOUT PROBLEMS

They are so simple. Why do you need the library? Just two or three pads or holes.

Yes, but people do things differently. I generate them in a C program.

How can it tell whether you use SMT or not?

Don't know any 2n222. You can use SOT-23 (SMT) or TO-92 (TH) for

They should be somewhere, but not tieing to the components.

Although, I'm not real familiar with Capture, I enter the footprints in manually when stuck having to use Capture. You can also use a stuff file if you want to save some time. Perhaps CIS is helpful.

What do you consider a basic part. For me, my standard resistor is a

What kind of resistors are you using? Thru-hole or surface mount? What wattage? What PCB specification do you need to adhere to (MIL spec, commercial, high vibration, ...)? If surface mount, what sort of assembly process (wave solder or reflow)? These all make a difference on what sort of footprint you will choose.

You can find common surface mount resistor and capacitor footprints in sm.llb. Through hole in tm_*.llb.

You will find that the Orcad supplied footprints need lots of help. For a production board or a complex board, I wouldn't use the Orcad footprints directly. Generally, one will either create their own footprint or modify an Orcad supplied footprint and store it in their own library. If you plan on using Layout, learn to make your own footprints as there are many parts not covered in the Orcad libraries. Every time I do a new PCB project, I always end up making a new parts.

This group may have been a better choice for CAD related ? sci.electronics.cad

No layout package I know of can do this.Some may have a default footprint in the parts properties but dont assume its correct.

For a thru hole 2n2222a for example I would use a TO/92/100 footprint, this gives you more room to resize the pads (easier if your fabbing your PCB yourself). Just be sure the pins are properly matched to the footprint. Thru- hole resistor footprints are located in TM axial library. Most of the components you listed if not all will be in one of the TM libraries you just have to select the proper size. If you don't have a footprint just browse through similar packages and resize one.

Just so you know OrCAD layout is being discontinued, so if you are just starting out you may want to try and learn an alternative layout package.