// defines pins numbers
const int trigPin = 9;
const int echoPin = 10;
const int buzzer = 11;
const int ledPin = 13;
// defines variables
long duration;
int distance;
int safetyDistance;
void setup() {
pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
pinMode(buzzer, OUTPUT);
pinMode(ledPin, OUTPUT);
Serial.begin(9600); // Starts the serial communication
}
#define buzzer 11 //change to any output pin (not analog inputs)
//run this code once()
void loop(){ //loop forever...
for(int i=0; i<255; i++) { //do this 255 times
analogWrite(buzzer, i); //raise the voltage sent out of the pin by 1
delay(0); //wait 10 milliseconds to repeat
}
for(int i=255; i>0; i--) { // do this 255 times
analogWrite(buzzer, i); //lower the voltage sent out of the pin by 1
delay(0); //wait 10 milliseconds to repeat
}
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(200);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(100);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);
// Calculating the distance
distance= duration*0.058/2;
safetyDistance = distance;
if (safetyDistance <= 20){
digitalWrite(buzzer, HIGH);
digitalWrite(ledPin, HIGH);
}
else{
digitalWrite(buzzer, LOW);
digitalWrite(ledPin, LOW);
}
// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);
}
This is the code im using. im using a ultrasonic sensor and an active buzzer to make noise for an art project. with this code I need help figuring out how to change the sound so it makes a different noise.