Hello friends, In this Intractable I am going to show how to make a program in Processing that analyzes sound on your speaker and sends data to an Arduino that controls an LED matrix to show the spectrum analysis with out any wire connection.

Code and diagram :https://roboman.in/uqAa

Components:
1) Arduino Nano: https://roboman.in/59h4
2) Arduino Nano Type C : https://roboman.in/xkfu
3) TP4056 Module : https://roboman.in/oa0m
4) DCDC Boost Converter LM2587 or XL6019 : https://roboman.in/kkuj
5) MAX7219 Dot Matrix 4 in 1 Display Module: https://roboman.in/jekd
6) Sound Sensor : Sound Sensor :https://roboman.in/vs1e
7) 18650 Lithium Battery 2500mah 3C :https://roboman.in/utwc
7) 18650 Lithium Battery 2600mah 3C :https://roboman.in/mmab
7) 18650 Lithium Battery 2200mah 1C :https://roboman.in/70b5
7) 18650 Lithium Battery 2000mah 1C :https://roboman.in/7em9
7) 18650 Lithium Battery 1800mah 1C :https://roboman.in/ywss

Code and diagram :https://roboman.in/uqAa

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AudioSpectrumAnalyzer
VUMeter
EasyTech

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