Arduino Beginner Series: Project 11: High Voltage Indicator using an Active Buzzer

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Check out the breadboard intro right HERE

In this project we’ll build a high voltage indicating system, in which the buzzer goes off when the voltage is above 4V (Arduino supplies from 0-5V).

Demo:

Things Required:

1. Arduino UNO
2. Breadboard
3. Jumper Wires
4. Active Buzzer Module
5. 10k Potentiometer
6. Arduino IDE on computer

Functions used:

1. digitalWrite()
2. Serial.println()
3. analogRead()
4. pinMode()

Reference Material:

1. So there are basically two Types of buzzers : Active Buzzers and Passive Buzzers. Here I’ve used an Active Buzzer. The basic difference is that an active buzzer as an internal oscillator which generates the tone and it requires a dc voltage. The passive buzzer however, requires an AC input.
   
2. I’ve used this (LINK) video as a reference.

Code:

View on/ Download from Github: (LINK)

int potpin=A2;
int potval;
float volt;
int buzzpin=12;

void setup() {
  // put your setup code here, to run once:
  pinMode(buzzpin, OUTPUT);
  pinMode(potpin, INPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:

  potval=analogRead(potpin);
  volt=(5.0/1023.0)*potval;
  Serial.println(volt);

  if(volt>4){
    digitalWrite(buzzpin, HIGH);
  } else {
    digitalWrite(buzzpin, LOW);
  }

}

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Happy Learning!!