Ultrasonic Sensor code

Ultrasonic Motion Sensor code -
https://goo.gl/PCL9Qo

/*Ultrasonic sensor Pins:

       VCC: +5VDC

       Trig : Trigger (INPUT) - Pin11

       Echo: Echo (OUTPUT) - Pin 13

       GND: GND

*/

WE'LL TRY THIS FIRST

#define trigPin 13 #define echoPin 12 #define led 7 void setup() { Serial.begin (9600); pinMode(trigPin, OUTPUT); pinMode(echoPin, INPUT); pinMode(led, OUTPUT); } void loop() { long duration, distance; digitalWrite(trigPin, LOW); delayMicroseconds(2); digitalWrite(trigPin, HIGH); delayMicroseconds(10); digitalWrite(trigPin, LOW); duration = pulseIn(echoPin, HIGH); distance = (duration/2) / 29.1; if (distance < 10) { digitalWrite(led,HIGH); } else { digitalWrite(led,LOW); }
Serial.print(distance); Serial.println(" cm"); delay(500); }

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ALTERNATIVE

//  Copy the following and paste into your Arduino software and delete the template provided (the void setup and void loop).

int trigPin = 11;    //Trig - white Jumper

int echoPin = 13;    //Echo - yellow Jumper

long duration, cm, inches;

void setup() {

 //Serial Port begin

 Serial.begin (9600);

 //Define inputs and outputs

 pinMode(trigPin, OUTPUT);

 pinMode(echoPin, INPUT);

}

void loop()

{

 // The sensor is triggered by a HIGH pulse of 10 or more microseconds.

 // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:

 digitalWrite(trigPin, LOW);

 delayMicroseconds(5);

 digitalWrite(trigPin, HIGH);

 delayMicroseconds(10);

 digitalWrite(trigPin, LOW);

 // Read the signal from the sensor: a HIGH pulse whose

 // duration is the time (in microseconds) from the sending

 // of the ping to the reception of its echo off of an object.

 pinMode(echoPin, INPUT);

 duration = pulseIn(echoPin, HIGH);

 // convert the time into a distance

 cm = (duration/2) / 29.1;

 inches = (duration/2) / 74;

   Serial.print(inches);

 Serial.print("in, ");

 Serial.print(cm);

 Serial.print("cm");

 Serial.println();

   delay(250);

}