Piezo Buzzer

Forum 2005-2010 (read only) General Frequently-Asked Questions
3

Sure..

int tresPin = 3;
int dosPin = 2;
int unoPin = 5;
int buzzPin = 7;
//int msPin = 5;

void setup()               
{
  // begin the serial communication
  Serial.begin(9600);
  
  pinMode(tresPin, OUTPUT);     
  pinMode(dosPin, OUTPUT); 
  pinMode(unoPin, OUTPUT); 
  pinMode(buzzPin, OUTPUT); 
  //pinMode(msPin, INPUT);
}

void loop() // continuous loop
{
  Serial.println("3");
  digitalWrite(tresPin, HIGH);  
  delay(1500); 
  digitalWrite(tresPin, LOW);
  
  Serial.println("2");
  digitalWrite(dosPin, HIGH);  
  delay(1500); 
  digitalWrite(dosPin, LOW);
  
  Serial.println("1");
  digitalWrite(unoPin, HIGH);  
  delay(1500); 
  digitalWrite(unoPin, LOW);
  
  Serial.println("Go!"); 
  digitalWrite(tresPin, HIGH);  
  digitalWrite(dosPin, HIGH);  
  digitalWrite(unoPin, HIGH);  
  digitalWrite(buzzPin, HIGH);
  delay(3000); 
  
  digitalWrite(tresPin, LOW);
  digitalWrite(dosPin, LOW);
  digitalWrite(unoPin, LOW);
  digitalWrite(buzzPin, LOW);

}

The power to run the buzzer comes from 12v wall plug, but I am using a transistor as a switch so that's what triggers the buzzer with buzzPin.