Arduino-Based Spectrum Analyzer

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/2020/1...
Link to FFT library:
www.arduino.cc/reference/en/l...
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

[@thevideogallery8577]

Hello, I really like this project of yours. I have two questions. Can you give me the schematics of the second demo where you used the microphone as an input?
Secondly, I am thinking of using this spectrum analyzer to create music reactive LED. Will it be a good idea?

[@ACID2BREAKS]

Great video - thanks! I used the same HW and sketch, but thespikes are very low, do you know why?

[@VDC48]

Thanks for sharing...👍

[@AnasKuzechie]

You’re welcome

[@gioiamariasolegaliazzo505]

Quick question: what if I want to zoom in because it's too small?

[@tarek_hosni8348]

Can we use GC9A01 round display here?

[@SA-oj3bo]

Amazing.. what would be the range with the faster ESP32?

[@AnasKuzechie]

That’s a good idea. I’ll look into it. Thanks for your feedback.

[@qzorn4440]

very interesting DIY spectrum analyzer video. 😎 The bigger display sounds intriguing and what about using one of the esp32 modules? 🤔 thanks and I cannot wait for the next video.

[@AnasKuzechie]

Thanks

[@bibliopelicomic]

Frecuency range?

[@rizkylevy8154]

Where the library?

[@AnasKuzechie]

A link is now available in the description