Arduino Spectrum Analyzer
In this video we use the Fix_FFT library to apply a Forier Transform(A fast Fourier transform (FFT) algorithm computes the discrete Fourier transform (DFT) of a sequence, or its inverse. Fourier analysis converts a signal from its original domain (often time or space) to a representation in the frequency domain and vice versa.) to an audio signal.
The signal is aquired through a microphone and is viewed in the frequency domain on an OLED screen.
Microphone with adjustable gain: [ Ссылка ]
OLED with I2C Interface: [ Ссылка ]
All of my sketches are available here: [ Ссылка ]
Yes I know I spelled analyzer wrong in the code and title, it's a joke.
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Please watch: "Diodes: The basic building block of all digital circuits"
[ Ссылка ]
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![](https://i.ytimg.com/vi/5RmQJtE61zE/mqdefault.jpg)