Fourier Series

The Multifunction plotter App shows a square wave approximated by a series of sine waves (Fourier Series).

Lightning wand

Lightning from a wand using the glow effect in Excel 2010 charts, see Expecto Petronam!

Butterfly plot

The Butterfly Curve, plotted using the Parametric Function Plotter.

Image processing with Excel

Image processing with Excel


Simulation of a Binary Coded Decimal decoder circuit.


A Psychedelic Image of a Mandelbrot Set: See Psychedelic Mandelbrot

Digital Rain

"Matrix" Movie Style Digital Rain

Image Processing with Excel

An advanced version of the Image Processing App, contributed by Bert van Zandbergen from Beekbergen, The Netherlands.