Distancemeasurement

@@ -0,0 +1,61 @@
+/*
+ A (neat) cheat way of getting the HC-SR04 distance sensor working on an Arduino Uno
+ put it in the end, with the GND aligned with the GND pin next to pin 13 and AREF
+ This example code is in the public domain.
+ */
+ 
+ 
+ 
+// Pin 13 has an LED connected on most Arduino boards.
+// give it a name:
+//int led = 13;
+int echopin = 13;
+int trigpin = 12;
+int vcc = 11;
+
+
+// the setup routine runs once when you press reset:
+void setup() {                
+    pinMode(echopin, INPUT);     
+    pinMode(trigpin, OUTPUT);     
+    pinMode(vcc, OUTPUT);    
+    digitalWrite(vcc, HIGH); 
+    Serial.begin(9600);
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+
+  long duration, distance;
+
+  digitalWrite(trigpin, LOW);  // Added this line
+
+  delayMicroseconds(4); // Added this line
+
+  digitalWrite(trigpin, HIGH);
+
+  delayMicroseconds(20); // Added this line
+
+  digitalWrite(trigpin, LOW);
+
+  duration = pulseIn(echopin, HIGH);
+
+  distance = (duration/2) / 29.1;
+
+  if (distance >= 200 || distance <= 0){
+
+    Serial.println("Out of range");
+
+  }
+
+  else {
+
+    Serial.print(distance);
+
+    Serial.println(" cm");
+
+  }
+
+  delay(500);
+
+}