21 Bands Spectrum Analyzer

This project is a frequency spectrum analyzer. The frequency channels are 21, from 36 hertz to 15,650 hertz. The number of pixels in a channel is 21. WS 2812 or WS 2813 can be used.

Modules used in the project:

1. Due R3 Core For Arduino Compatible SAM3X8E 32bit ARM Cortex M3 Module UC-2102 512K Flash 96K RAM 12bit ADC 12bit DAC 84MHz

https://www.aliexpress.com/item/32681732855.html?spm=a2g0s.9042311.0.0.27424c4dnKEb2c

2. Graphic Equalizer Display Filter - MSGEQ7

https://www.sparkfun.com/products/10468

3. Transistor MOSFET DC Switch, 5V logic, DC 24V/30A with optocouplers

https://www.aliexpress.com/item/32671829582.html?spm=a2g0s.9042311.0.0.27424c4dmP3v8e

4. AMS1117 3.3V  power supply module AMS1117-5.0V power module AMS1117-3.3V

https://www.aliexpress.com/item/33000074988.html?spm=a2g0s.9042311.0.0.27424c4dmP3v8e

5. DC 3V-5V CJMCU-5351 Si5351A Si5351 I2C Clock Generator Breakout Board Module Signal Generator Clock 8KHz-160MHz For Arduino

https://www.aliexpress.com/item/4000078061856.html?spm=a2g0s.9042311.0.0.27424c4ddnmerU

6. Infrared IR Wireless Remote Control Module Kits DIY Kit HX1838 For Raspberry Pi arduino

https://www.aliexpress.com/item/32874724041.html?spm=a2g0s.9042311.0.0.27424c4dKbDFse

The other elements are described in the wiring diagram.
Potentiometer and LED control boards are also publicly available.

Everyone is free to work on this project.

Firmware is not distributed freely. Only completed project is offered.
For contact:

trayko67@gmail.com

I am announcing the next project I am working on:

21 Bands Spectrum Analyzer 3.5 inch LCD Touch screen control