Dancing Fountain: Arduino with MSGEQ7 Spectrum Analyzer

Using the Arduino to control 3 modes of Spectrum Analyzing Technique with the MSGEQ7.

Mar 17, 2020

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Components and supplies

LED (generic)

MSGEQ7 Spectrum Analyzer IC

Arduino Mega 2560

Perma-Proto Breadboard Half Size

3.5 Audio Jack

Tools and machines

Wire Stripper & Cutter, 18-10 AWG / 0.75-4mm² Capacity Wires

Apps and platforms

Arduino IDE

Project description

Code

Source Raw Code

c_cpp

This code is a raw code used to test the functionality of the MSGEQ7 IC

1#define msg7RESET 3
2#define msg7Strobe 2
3#define msg7DCout 0
4
5const  int LEDpins[7] = {4,5,6,7,8,9,10};
6
7void setup() {
8
9for (int x=0; x<7;  x++)
10{
11pinMode(LEDpins[x], OUTPUT);
12}
13pinMode(msg7RESET, OUTPUT);
14pinMode(msg7Strobe,  OUTPUT);
15}
16
17void loop()
18{
19digitalWrite(msg7RESET, HIGH);
20delay(5);
21digitalWrite(msg7RESET,  LOW);
22
23for (int x = 0; x < 7; x++)
24{
25digitalWrite(msg7Strobe, LOW);
26delayMicroseconds(35);
27int  spectrumRead = analogRead(msg7DCout);
28
29int PWMvalue = map(spectrumRead, 0,  1024, 0, 255);
30if (PWMvalue < 50)
31PWMvalue = PWMvalue / 2;
32analogWrite(LEDpins[x],  PWMvalue);
33digitalWrite(msg7Strobe, HIGH);
34}
35}
36

#define msg7RESET 3
#define msg7Strobe 2
#define msg7DCout 0

const  int LEDpins[7] = {4,5,6,7,8,9,10};

void setup() {

for (int x=0; x<7;  x++)
{
pinMode(LEDpins[x], OUTPUT);
}
pinMode(msg7RESET, OUTPUT);
pinMode(msg7Strobe,  OUTPUT);
}

void loop()
{
digitalWrite(msg7RESET, HIGH);
delay(5);
digitalWrite(msg7RESET,  LOW);

for (int x = 0; x < 7; x++)
{
digitalWrite(msg7Strobe, LOW);
delayMicroseconds(35);
int  spectrumRead = analogRead(msg7DCout);

int PWMvalue = map(spectrumRead, 0,  1024, 0, 255);
if (PWMvalue < 50)
PWMvalue = PWMvalue / 2;
analogWrite(LEDpins[x],  PWMvalue);
digitalWrite(msg7Strobe, HIGH);
}
}

Source Raw Code

c_cpp

This code is a raw code used to test the functionality of the MSGEQ7 IC

1#define msg7RESET 3
2#define msg7Strobe 2
3#define msg7DCout 0
4
5const
6  int LEDpins[7] = {4,5,6,7,8,9,10};
7
8void setup() {
9
10for (int x=0; x<7;
11  x++)
12{
13pinMode(LEDpins[x], OUTPUT);
14}
15pinMode(msg7RESET, OUTPUT);
16pinMode(msg7Strobe,
17  OUTPUT);
18}
19
20void loop()
21{
22digitalWrite(msg7RESET, HIGH);
23delay(5);
24digitalWrite(msg7RESET,
25  LOW);
26
27for (int x = 0; x < 7; x++)
28{
29digitalWrite(msg7Strobe, LOW);
30delayMicroseconds(35);
31int
32  spectrumRead = analogRead(msg7DCout);
33
34int PWMvalue = map(spectrumRead, 0,
35  1024, 0, 255);
36if (PWMvalue < 50)
37PWMvalue = PWMvalue / 2;
38analogWrite(LEDpins[x],
39  PWMvalue);
40digitalWrite(msg7Strobe, HIGH);
41}
42}
43

#define msg7RESET 3
#define msg7Strobe 2
#define msg7DCout 0

const
  int LEDpins[7] = {4,5,6,7,8,9,10};

void setup() {

for (int x=0; x<7;
  x++)
{
pinMode(LEDpins[x], OUTPUT);
}
pinMode(msg7RESET, OUTPUT);
pinMode(msg7Strobe,
  OUTPUT);
}

void loop()
{
digitalWrite(msg7RESET, HIGH);
delay(5);
digitalWrite(msg7RESET,
  LOW);

for (int x = 0; x < 7; x++)
{
digitalWrite(msg7Strobe, LOW);
delayMicroseconds(35);
int
  spectrumRead = analogRead(msg7DCout);

int PWMvalue = map(spectrumRead, 0,
  1024, 0, 255);
if (PWMvalue < 50)
PWMvalue = PWMvalue / 2;
analogWrite(LEDpins[x],
  PWMvalue);
digitalWrite(msg7Strobe, HIGH);
}
}

Downloadable files

LEDs as PWM outputs

In this connection, we can get the outputs as PWM digital signals. The LEDs fade and shine upon the strength of the input frequencies' power.

LEDs as PWM outputs

Pumps as digital outputs

In this connection, we can get the output as digital signals. The pumps runs and the LEDs flash upon the strength of the input frequencies' power.

Pumps as digital outputs

In this connection, we can get the output as digital signals. The pumps runs and the LEDs flash upon the strength of the input frequencies' power.

Pumps as digital outputs

LED as digital outputs

In this connection, we can get the outputs as digital signals. The LEDs flash upon the strength of the input frequencies' power.

LED as digital outputs

LEDs as PWM outputs

In this connection, we can get the outputs as PWM digital signals. The LEDs fade and shine upon the strength of the input frequencies' power.

LEDs as PWM outputs

Documentation

Schematic connection for the MSGEQ7

The main connection for the MSGEQ7 before connecting it to the Arduino.

Schematic connection for the MSGEQ7

The main connection for the MSGEQ7 before connecting it to the Arduino.

Schematic connection for the MSGEQ7

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