Basically this program solves Laplace's equation on a grid.  It calculates the potential of two parallel plates at every point on the grid and displays that potential in many different ways.  It lets the user change the voltage and placement of the charges  and it plots the E-Field at any point in the process.

Tips on running this applet:

           Reset: This button resets the applet to two plates:

                   The green plate on  the left  is +100 Volts and the purple plate on the right is -100V.

           Run: This button tells the applet to start calculating the voltages around the capacitor.

             Step: This button steps the calculations one time step at a time.

           TwoD: Shows the electric potentials in a two-dimensional plot

            ThreeD: Shows the electric potentials in a three-dimensional plot

           Contour: Shows the electric potentials in a contour plot

           Grid: Shows the electric potentials in a grid like plot

            E-Field: On the two-D plot the action is stopped and the electric field lines are shown at non-zero

                 potential points.  I suggest waiting until all of the voltages are calculated so that one can see the

                 electric field lines at every single point

            Clear: This button clears the field of all charges, including the two parallel plates so that the user can place

                    their own charges.

            Input Voltage:  The user can change the voltage of their charges by entering a Voltage in the text field

                    and pressing this button

To see documentation on this program click on the following link: Documentation

Homeward Bound. .