Science Buddies: "Ask an Expert"

Hello! I'm working on a project involving the use of driven pendulums, and I need to know how to build one for myself, as well as how to calculate all necessary equations, and also how Poincare Sections are graphed. Thank you!

This isn't my area of specialty, but this website seems to provide a bunch of equations and some java-based online tools for calculating driven pendulums and graphing Poincare Sections: http://www.phy.davidson.edu/StuHome/chg ... _frame.htm