Uploaded December 2020 | Updated September 2026, 2 weeks ago

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Arduino Nano is programmed to display a spectrum analyzer on an OLED screen. Square wave and speech signals are used to test the analyzer.

Link to code:
akuzechie.blogspot.com/2020/12/arduino-based-spectrum-analyzer.html

Link to FFT library:
arduino.cc/reference/en/libraries/fix_fft

Contents:
0:00 Introduction
0:19 Spectrum Analyzer Basics
0:59 Block Diagram of the Implemented System
1:42 Demonstration 1: Square Wave Analysis
2:16 Demonstration 2: Speech Input
2:35 C++ Sketch
4:16 Future Project: Spectrum Analyzer using ST7920 LCD