Kenbo,
AutoCAD can be used to generate Schematics, but there are other applications more "User Friendly".
MS Visio may be used for this task - and is much more cost friendly than a CAD Package.
For really trick Schematic work, a Circuit Simulation (PSPICE) Application is the hot setup!
I used an Application called "Circuit Maker (versions 3, 4 and 5)", which is a Windows-Based PSPICE Analog + Digital Simulation Application.
Full version (version 5, back in 1998) was $300.00 USD.
Very useful App'!
Visio is another useful + cost friendly Application, for compiling Schematics.
Although it does not offer the PSPICE Simulation (unless there is a version of Visio for Electrical Schematics which has some tweeks), it does allow for nice quality Schematic work.
There are many Electronic / Electrical Schematic Applications available - some as CAD Packages (Autodesk has a few), others in "Non-CAD Flavors" (like breadboarding app's, etc.).
Try a Google search for "Electrical Schematics Applications" or "Electronic Schematics Applications" (or whatever relavent terms would work best).
You are likely to find 1,000's of leads!
Scott35