A harmonograph is a mechanical device that employs pendulums to create a picture called a harmonogram. I've replaced the mechanical device with a computer application so you can create them without having to build one. (read more...)
There are two versions of Virtual Harmonograph. The HTML5 version runs in your browser. The Windows version requires a download and install.
If you would like to learn how to create harmonographs read my article: Intro to Harmonographs.
You can use the virtual harmonograph right in your browser! This is an HTML5 web application-- requires no download or installation. You can export PNG images and save graphs to your browser's local storage.
Requires a browser that supports HTML5. Including IE 10+, Firefox 3.5+, Chrome 4+ and Safari 4+. Chrome is recommended.
The Windows version has a tabbed interface so you can draw multiple graphs at the same time. You can save graphs in many different image formats. NOTE: The Windows version isn't being actively developed anymore. I suggest using the online version.
Requires Microsoft .Net Framework 3.5 or later.