Published September 30, 2018 © GPL3+

Super Basic MSGEQ7 7 Band Spectrum Analyzer Module Project!

Super basic coding sourced from the web.

BeginnerFull instructions provided15,744

Super Basic MSGEQ7 7 Band Spectrum Analyzer Module Project!

Things used in this project

Hardware components

Arduino UNO

DFRobot MSGEQ7 Audio Analyzer Module

Breadboard (generic)

Male/Female Jumper Wires

Depends on how many you would need.

Male/Male Jumper Wires

Depends on how many you would need.

LED (generic)

I used 5mm blues and whites.

Resistor 100 ohm

3.5mm Audio Jack

3.5mm Audio Splitter

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)

Soldering Lead

Flush Wire Cutter

Story

Add an imageDelete this imageThis project is about the magnificent IC / module called "MSGEQ7".

It's really fun to use albeit a little bit confusing when it comes to the coding part.

I made it to test what I can do with it and to know whether if I can use it on my future projects.

This is a 7 Band Audio Analyzer Module from DFRobot.

"This Audio Analyzer module features the MSGEQ7 graphic equalizer display filter.It will give your arduino ears. Sound is broken down into seven frequency bands and the peak level for each band can be read. The seven frequencies measured are as follows: 63Hz, 160Hz, 400Hz, 1kHz, 2.5kHz, 6.25kHz and 16kHz.

This Audio Analyzer module can be used to create sound visualizers, detect patterns in music or add sound activation to your microcontroller." - DFRobot Website. (https://www.dfrobot.com/product-514.html)

It collects/reads sound frequency like a Sound Sensor Module. But it does it digitally when connected to a headphone jack.

Whenever a certain peak or threshold has been reached, it activates the LED/s and turns it on. Sound frequency data can also be seen by using the Serial Plotter on the Arduino IDE Software.

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Social Media Links To Follow (I mean, if you want to):

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This is what the module looks like.

Here is the full tutorial.

https://youtube.com/@HeathenHacks

Code

My edited code.

#include <AudioAnalyzer.h>

#define msgRST 12
#define msgStrobe 13
#define msgAnalog 0
Analyzer Audio = Analyzer(10, 11, 0); //Strobe pin ->10  RST pin ->11 Analog Pin ->0


int LEDpins[7] = {2, 3, 4, 5, 6, 7, 8};
int FreqVal[7] = {63, 160, 400, 1000, 2500, 6250, 16000};

void setup()
{
  Serial.begin(57600);	//Init the baudrate
  Audio.Init();         //Init module

  for (int x = 0; x < 7; x++) {
    pinMode(LEDpins[x], OUTPUT);
  }
  pinMode(msgRST, OUTPUT);
  pinMode(msgStrobe, OUTPUT);
}


void loop()
{
  Audio.ReadFreq(FreqVal);      //return 7 value of 7 bands pass filter
  //Frequency(Hz):63  160  400  1K  2.5K  6.25K  16K
  //FreqVal[7]:      0    1    2    3    4    5    6
  digitalWrite(msgRST, HIGH);
  delay(20);
  digitalWrite(msgRST, LOW);

  for (int x = 0; x < 7; x++)
  {
    digitalWrite(msgStrobe, LOW);
    delayMicroseconds(20);
    int spectrumRead = analogRead(0);
    int PWMvalue = map(spectrumRead, 0, 1024, 0, 255);
    if (PWMvalue < 75)
      PWMvalue = PWMvalue / 100;
    analogWrite(LEDpins[x], PWMvalue);
    digitalWrite(msgStrobe, HIGH);

    
    Serial.print(max((FreqVal[x] - 100), 0));     //Transmit the DC value of the seven bands
    if (x < 6)  Serial.print(",");
    else Serial.println();
  }



}

Credits

HeathenHacks

24 projects • 57 followers

I don't know what I'm doing here.

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Super Basic MSGEQ7 7 Band Spectrum Analyzer Module Project!

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

Wiring Diagram

Code

My edited code.

Credits

HeathenHacks

Comments

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Super Basic MSGEQ7 7 Band Spectrum Analyzer Module Project!

Super Basic MSGEQ7 7 Band Spectrum Analyzer Module Project!

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

Wiring Diagram

Code

My edited code.

Credits

HeathenHacks

Comments

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