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Arduino Color Organ Fourier Transform Power Spectrum

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Uploaded by on Jul 20, 2010

Details

No assembly language! The standard Arduino library calls are used for analog input.

16 point, floating point FFT with no optimizations. The whole FFT happens in about 8 ms.

The power spectrum is grouped into three bins and the LEDs are driven with PWM.

An electret mic is connected to the analog input via a cap, and a voltage divider biases the analog input at mid range.

Some aliasing is apparent because I don't low-pass the microphone input.

Reference: Numerical Recipes in C.

More details: scottrharris.blogspot.com

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  • i too would like if you could post some of the code you used for this project.

  • BORING

    

  • Where did you find the code? I am very interested in this project and this could save me a lot of time.

  • Can you please send me the schematic and the source code/

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