Chris: Why not test-drive the packages? Orcad is available in a demo or student version. I use it with my students in a transmission line course, and the student version is more than adequate there. For circuits, there is a limit of about 60 nodes, but you should be able to get a feel for it. Full manuals are included on the CD. I don't know about Proteus, but you'd think they would also have something. Some companies allow you to try the full software for a 30 day trial. It takes me more than 30 days just to learn how to use new software effectively. I've used MathCAD since Version One point something. It has gotten bloated and expensive, but very useful. I suggest looking for an earlier version on the used SW market, or getting an Academic Version (about $130 USD) at a college or University or online at any of many academic software sellers. You'll need a faculty or student ID to do this. A cheap way to get an ID is to sign up for one course, get your ID, buy your software, and then drop the course when you can still get some tuition refund. Or better, actually take the course. Your imagination can think of other ways, I am sure. Regards, Jacob Z. Schanker, P.E. j.schan...@ieee.org
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