hi

My_Alarm_Sensor

+const int trigPin = 9;
+const int echoPin = 10;
+const int buzzer = 11;
+const int ledPin = 13;
+
+long duration;
+int distance;
+int safetyDistance;
+
+
+void setup() {
+  pinMode(trigPin, OUTPUT);
+  pinMode(echoPin, INPUT);
+  pinMode(buzzer, OUTPUT);
+  pinMode(ledPin, OUTPUT);
+  Serial.begin(9600);
+}
+
+
+
+void loop() {
+
+  digitalWrite(trigPin, LOW);
+  delayMicroseconds(2);
+
+
+  digitalWrite(trigPin, HIGH);
+  delayMicroseconds(10);
+  digitalWrite(trigPin, LOW);
+
+
+
+  duration = pulseIn(echoPin, HIGH);
+
+
+  distance= duration*0.034/2;
+
+  safetyDistance = distance;
+  if (safetyDistance <= 5) {
+    digitalWrite(buzzer, HIGH);
+    digitalWrite(ledPin, HIGH);
+  }
+    else{
+      digitalWrite(buzzer, LOW);
+      digitalWrite(ledPin, LOW);
+
+
+      Serial.print("Distance: ");
+      Serial.println(distance);
+      
+    }
+  }
+
+