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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!ohstpy!garland
- From: garland@ohstpy.mps.ohio-state.edu
- Newsgroups: sci.electronics
- Subject: PADS pc-layout software: Basic Information
- Message-ID: <15394.2b4e9964@ohstpy.mps.ohio-state.edu>
- Date: 9 Jan 93 09:22:44 EST
- Organization: The Ohio State University, Department of Physics
- Lines: 64
-
- A number of requests have come up lately requesting information about PADS
- Software for drawing schematics and laying out printed circuit boards. Having
- just researched this subject in the past couple of weeks, I offer the following
- comments:
-
- (1) What is PADS?
- Pads Software is a Massachussets-based company that sells a variety of CAD-type
- pc-layout software packages. A complete schematic-capture and layout package
- starts at about $1500 (for DOS machines) and ranges to $10K+. Universities get
- a fifty percent discount. A Shareware version of the DOS software is available,
- however, which has many of the features of the $1500 package.
-
- (2) Where do I get the shareware version of PADS?
- You can call the company's 800 number and request it. They're very nice about
- mailing it out, but remember that the company isn't running a charity and hopes
- to sell their full-fledged version. Alternately, you can download it from one
- of the archive networks using ftp. I have obtained it successfully from
- wsmr-simtel20.army.mil, where it can be found in the directory pd1:<msdos.cad>.
- Don't forget to use a binary transfer, and when you unzip the file specify the
- -d switch on PKUNZIP to preserve the zipped directory structure.
-
- (3) What files do I need?
- PADS comes in three files: PADSLOG (contains the schematic capture program),
- PADSPCB (which contains the pc-layout program), and PADSLIB, which contains the
- component libaries. Once the files are unzipped, you'll also find a program
- PINSTALL.EXE which you can use to install the programs. Also read the README
- files. You'll need three floppies.
-
-
- (4) What about documentation?
- There are documentation files on both PADSLOG and PADSPCB, which you should
- print out. They give you a rough introduction to the capability of the software
- but are no substitute for a full-fledged manual. Unfortunately, Pads Software
- is reluctant to sell the manual (actually, you can buy one for $500), because
- they've had problems with pirate copying). The latest shareware documentation
- from the company contains some helpful information that is not yet in the
- archives, incidentally. However, the archives do have the latest release of
- the shareware itself.
-
- (5) How hard is PADS to learn?
- I have found the learning curve to be rather steep -- about like learning
- Autocad, though much of my frustration is associated with not having a
- full-fledged manual and having therefore to experiment quite a bit. The
- software is very powerful, however, and if you have a need for this sort of
- thing probably worth the 20 or so hours it will take to learn to use it.
-
- (6) What are the limitations of the shareware version of PADS?
- The shareware version restricts you to projects of roughly 35 ICs -- which
- should be large enough for most hobbiests. Actually, the shareware limits
- include many aspects of the design. It limits you, for instance, to 75 text
- strings, 750 text characters, 1000 corners, 50 arcs, 25 part types, 50 gates,
- 100 tie dots, etc. One caution: Don't try to learn the software by designing an
- important project, since every time you add and then delete a component (and,
- believe me, you'll be doing this constantly as you learn, say, which of the
- two dozen capacitor decals you want to use) the software counts the component
- toward the limit but doesn't uncount it when the component is deleted.
-
- (7) Is it worth the effort?
- If you have need for some well-designed professional-grade software of this
- type, then yes: PADS shareware is an incredible gift from the company. On the
- other hand, I can guarantee you hours of struggle before you're comfortable
- using it. If you'd like to read more about it, one of the upscale Pads products
- was reviewed in the Oct. 15, 1992 issue of EDN. The shareware version has most
- of the same features, although the menu layout is a bit different.
-