Ultrasonic Motion Detection Alarm Using Arduino ~ The Young Engineerzz

Step 1: Components

Step 2: Uploading the code

CODE :

#define trigPin 12

#define echoPin 13

int Buzzer = 8;

void setup() {

Serial.begin (9600);

pinMode(trigPin, OUTPUT);

pinMode(echoPin, INPUT);

pinMode(Buzzer, OUTPUT);

}

void loop() {

int duration, distance;

digitalWrite(trigPin, HIGH);

delayMicroseconds(1000);

digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);

distance = (duration/2) / 29.1;

if (distance >= 80 || distance Serial.println("no object detected");

digitalWrite(Buzzer, LOW);

}

else {

Serial.println("object detected");

tone(Buzzer, 400); // play 400 Hz tone for 500 ms

delay(500);

tone(Buzzer, 800); // play 800Hz tone for 500ms

delay(500);

tone(Buzzer, 400); // play 400 Hz tone for 500 ms

delay(500);

tone(Buzzer, 800); // play 800Hz tone for 500ms

delay(500);

tone(Buzzer, 400); // play 400 Hz tone for 500 ms

delay(500);

tone(Buzzer, 800); // play 800Hz tone for 500ms

delay(500);

noTone(Buzzer);

}

delay(300);

}