The animation is divided into two parts. In the first part, it shows first three harmonics as circles and how they are mapped to sinusoids. In the second part, it combines each harmonics and circles to obtain the synthesis of the square wave.
The whole animation can be watched at http://youtu.be/LznjC4Lo7lE
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That is the best illustration.
Great! Thanks a lot!
Excellent! Very efficient way of simulating the underlying basics of the Fourier Theory. Thank you!
Link to animation added
Inspired: Decomposition of a signal in time domain
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