Ladder Diagrams

[BigBadTex]

I was wondering where I might find ladder logic diagrams.  Any application(s) will be sufficient.  I have a cheap-o cuttler hammer PLC that I want to use with my rube goldberg project.  I'm not sure as to the application at the moment.  I was hoping to find a ladder diagram that would strike my fancy.  If anyone is in the sharing mood or could direct me to a place on the web it would be greatly appreciated.  Thanks in advance.

[FernanDoylet]

Paper Presentation:
"Applying the Control Programming Standard IEC 61131-3 to Software Engineering"

Posted at: http://www.doylet.org/docs/simula.doc

Abstract:
Preparing periodic batches to run updates or get reports from mainframes, requires a good understanding of the requirements of each component, to avoid the cancellation of any batch process and its resulting lost of time and resources.  To improve that understanding, an industrial Programmable Logic Controller (PLC) was set to simulate a batch process; the industrial components included in the existing tutorial, were used based on their functionality, as equivalent software components.

Note:
If you publish this article elsewhere, or use it as a reference, please send me the details to FernanDoylet@yahoo.com or reply to this post.