[sdiy] harmonic generator

[jorgen.bergfors at idg.se]

>My understanding is that a full-wave rectified (absolute value) sine wave
>contains an infinite even harmonic series.

Yes, but it desn't have much higher harmonics.
You will get a nice spectrum with only even harmonics, if you mix a sine
wave with a sawtooth of twice the frequency. The sine should have 1.273
times the amplitude of the sawtooth.

You can check the overtones of different waveform at this excellent site:
http://www.falstad.com/fourier/

/Jorgen

P.S. Thanks to Magnus Danielsson and Mattias Rickardsson for help with this
information.