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Simple Light Organ

I want the turn on some LED in the rhythm of music. So I need am amplified microphone like this, five colored LEDs and five resitors 220 Ohm to reduce the Arduino 5V pinout voltage on each LED.

The analog signal from microphone (sound waves) will be captured on an analog input pin of arduino let say “analog 0”. The sound will be tranformed in the frequencies space with Fast Fourier Transform (FFT). Than we average the FFT in five frequency bands. We test an activation level for each LED and we turn on the corresponding digital pins.

The arduino code can be donwloaded here.

A simple demonstration of the light organ can be seen here:

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