On Mon, 2 Nov 2009 08:35:48 +0000, Ian Jackson
wrote:

Somewhere out there on the internet, there's a site where you can build
(or, more accurately, 'synthesise') your own waveform from its
individual components. It's great fun and very instructive.
Unfortunately, I can't find it at the moment (but I'm looking).

Perhaps?
http://www.fourier-series.com/fourierseries2/fourier_series_tutorial.html

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558