Buzzer volume visualizer using 5 LEDs and potentiometer as an adjuster

 In this Project, I used a potentiometer as an adjuster for volume while the buzzer outputs the sound. The 5 LEDs visualizes how loud the sound that the buzzer produces is.

How I Made it:

The components that I used are:

• Arduino
• Breadboard
• 5 LEDs
• Active Buzzer
• 5 330 Resistor
• Jumper Wires
• Potentiometer

the Pins are used are listed below:

5V of Arduino  > positive rail

GND of Arduino > negative rail

Potentiometer + > positive rail

Potentiometer - > negative rail

Potentiometer data > A0

Buzzer + > pin 9

Buzzer  - > negative rail

pin 3 > 330 Resistor > LED 1+

negative rail  > LED 1-

pin 2 > 330 Resistor > LED 2+

negative rail  > LED 2-

pin 4 > 330 Resistor > LED 3+

negative rail  > LED 4-

pin 5 > 330 Resistor > LED 4+

negative rail  > LED 5-

pin 6 > 330 Resistor > LED 5+

negative rail  > LED 5-

Code:

//Potentiometer
int Ppin = A0;

//LEDs
int l1 = 3;
int l2 = 2;
int l3 = 4;
int l4 = 5;
int l5 = 6;

//buzzer
int Bpin = 9; 

//values

//potentiometer
int potval;

void setup() {
  // put your setup code here, to run once:

pinMode(Ppin,INPUT);

pinMode(l1,OUTPUT);
pinMode(l2,OUTPUT);
pinMode(l3,OUTPUT);
pinMode(l4,OUTPUT);
pinMode(l5,OUTPUT);

pinMode(Bpin,OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  potval = analogRead(Ppin);
  Serial.println(potval);

  analogWrite(Bpin, (255./1023.)*potval);

  if (potval <= 204.6){
  analogWrite(l1,(255./204.6)*potval);
  }
  else if (potval >= 204.6){
    digitalWrite(l1,HIGH);
    }

    
  if (potval >= 409.2){
    digitalWrite(l2,HIGH);
    }
    else{
    digitalWrite(l2,LOW);}
    
  if (potval >= 613.8){
    digitalWrite(l3,HIGH);
    }
    else{
    digitalWrite(l3,LOW);}
    
  if (potval >= 818.4){
    digitalWrite(l4,HIGH);
    }
    else{
    digitalWrite(l4,LOW);}
    
  if (potval >= 1020){
    digitalWrite(l5,HIGH);
    }
    else{
    digitalWrite(l5,LOW);}    
}