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Arduino noise levels

 

Arduino noise levels with LEDs and Processing code

Arduino Sound Leds

 

Parts Required:

–  Arduino NANO v3.0
–  Microphone Sensor
–  LED  (6)
–  Resistor 220 ohm (6)
–  Wires  to connect it all together

Arduino analog microphone
The Arduino Sketch:

Connect the components and wires as shown in the two pictures.

Arduino Code:
uper   

 

// Example by Hisham Marzouk
// Officialhrm.com
const int sampleWindow = 50; // Sample window width in mS (50 mS = 20Hz)
int sample;
int led1= 2;
int led2= 3;
int led3= 4;
int led4= 5;
int led5= 6;
int led6= 7;
void setup()
{
Serial.begin(9600);
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(led4, OUTPUT);
pinMode(led5, OUTPUT);
pinMode(led6, OUTPUT);
}

void loop()
{
unsigned long startMillis= millis();  // Start of sample window
unsigned int peakToPeak = 0;   // peak-to-peak level

unsigned int signalMax = 0;
unsigned int signalMin = 1024;

// collect data for 50 mS
while (millis() startMillis < sampleWindow)
{
sample = analogRead(0);
if (sample < 1024)  // toss out spurious readings
{
if (sample > signalMax)
{
signalMax = sample;  // save just the max levels
}
else if (sample < signalMin)
{
signalMin = sample;  // save just the min levels
}
}
}
peakToPeak = signalMax signalMin;  // max – min = peak-peak amplitude
double volts = (peakToPeak * 5.0) / 1024;  // convert to volts

Serial.println(volts);

if (volts < 0.03)       {
digitalWrite (led1,LOW);
}
else{
digitalWrite (led1,HIGH);
     }
if (volts < 0.06)       {
digitalWrite (led2,LOW);
}
else{
digitalWrite (led2,HIGH);
     }
if (volts < 0.9)       {
digitalWrite (led3,LOW);
}
else{
digitalWrite (led3,HIGH);
     }
if (volts < 0.12)       {
digitalWrite (led4,LOW);
}
else{
digitalWrite (led4,HIGH);
     }
if (volts < 0.15)       {
digitalWrite (led5,LOW);
}
else{
digitalWrite (led5,HIGH);
     }

if (volts < 0.18)       {
digitalWrite (led6,LOW);
}
else{
digitalWrite (led6,HIGH);
     }
}

 

Down

 

 

Processing Code :

 

// Example by Hisham Marzouk
//Officialhrm.com

import processing.serial.*;
PImage bg;
Serial myPort;  // The serial port

void setup() {
size(100,330);
bg = loadImage(“breadboard2.jpg”);
// List all the available serial ports:
printArray(Serial.list());
// Open the port you are using at the rate you want:
myPort = new Serial(this, Serial.list()[0], 9600);
fill(215, 215, 215);
ellipse(50, 290, 42, 42);
fill(215, 215, 215);
ellipse(50, 240, 42, 42);
fill(215, 215, 215);
ellipse(50, 190, 42, 42);
fill(215, 215, 215);
ellipse(50, 140, 42, 42);
fill(215, 215, 215);
ellipse(50, 90, 42, 42);
fill(215, 215, 215);
ellipse(50, 40, 42, 42);
background(bg);
}
void draw() {
while (myPort.available() > 0) {
String inBuffer = myPort.readString();
if (inBuffer != null) {
println(inBuffer);
}
if(float(inBuffer) > 0.02){
fill(255, 0, 0);
ellipse(50, 290, 42, 42);
}
else {
fill(215, 215, 215);
ellipse(50, 290, 42, 42);
}
if(float(inBuffer) >= 0.04){
fill(0, 255, 0);
ellipse(50, 240, 42, 42);
}
else {
fill(215, 215, 215);
ellipse(50, 240, 42, 42);
}

if(float(inBuffer) >= 0.06){
fill(0, 0, 255);
ellipse(50, 190, 42, 42);

}
else {
fill(215, 215, 215);
ellipse(50, 190, 42, 42);
}

if(float(inBuffer) >= 0.08){
fill(0, 0, 255);
ellipse(50, 140, 42, 42);

}
else {
fill(215, 215, 215);
ellipse(50, 140, 42, 42);
}

if(float(inBuffer) >= 0.10){
fill(255, 255, 255);
ellipse(50, 90, 42, 42);

}
else {
fill(215, 215, 215);
ellipse(50, 90, 42, 42);
}

if(float(inBuffer) >= 0.12){
fill(255, 255, 255);
ellipse(50, 40, 42, 42);

}
else {
fill(215, 215, 215);
ellipse(50, 40, 42, 42);
}

}
}

 



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Posted in Arduino

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