EXP 3. Create simple security alarm system using Arduino

 

Program

#define trigPin 7 

#define echoPin 6 

#define LEDlampRed 10

#define LEDlampYellow 11

 

#define LEDlampGreen 12

 #define soundbuzzer 4

 

void setup() 

{ 

Serial.begin (9600);

pinMode(trigPin, OUTPUT);

 pinMode(echoPin, INPUT); 

pinMode(LEDlampRed, OUTPUT); 

pinMode(LEDlampYellow, OUTPUT);

 pinMode(LEDlampGreen, OUTPUT); 

pinMode(soundbuzzer, OUTPUT);

}

void loop() {

digitalWrite(trigPin, LOW);

 delayMicroseconds(2);

 digitalWrite(trigPin, HIGH);

 delayMicroseconds(10); 

digitalWrite(trigPin, LOW);

 durationindigit=pulseIn(echoPin, HIGH);

 distanceincm= (durationindigit/5) /29.1;

digitalWrite(LEDlampGreen, HIGH); 

digitalWrite(LEDlampRed, LOW);

 digitalWrite(LEDlampYellow, LOW); 

noTone(soundbuzzer);

}

else {

digitalWrite(LEDlampGreen, LOW);

 

}

digitalWrite(LEDlampYellow, HIGH); 

digitalWrite(LEDlampGreen, LOW); 

digitalWrite(LEDlampRed, LOW);

}

else { digitalWrite(LEDlampYellow,LOW);

}

digitalWrite(LEDlampRed, HIGH); 

digitalWrite(LEDlampGreen, LOW); 

digitalWrite(LEDlampYellow, LOW); 

sound=1000; tone(soundbuzzer,sound);

}

}