How To Ultrasonics Sensor With LCD

                    
1. /*

2. Ultrasonic Sensor with LCD

3. This example shows how to use Ultrasonic Sensor with LCD

4. The circuit:

5. -Ultrasonic sensor

6. echo pin connected to digital pin 13 of Arduino

7. trig pin connected to digital pin 12 of Arduino

8. Vcc pin connected to Vcc pin of Arduino

9. Gnd pin connected to Gnd pin of Arduino

10. -LCD

11. SDA connected to analog pin A4.

12. SCL connected to analog pin A5.

13.

14. http://hackerspacekarachi.org/

15. */

16. //Library version:1.1

17. #include <Wire.h>

18. #include <LiquidCrystal_I2C.h>

19.

20. #define echoPin 13 // define output pin

21. #define trigPin 12 //define input pin

22.

23. long duration; //store time taken for wave to trvel

24. int distance; // store distance travel by wave

25. LiquidCrystal_I2C lcd(0x27, 20, 4); // set the LCD address to 0x27 for a 16 chars and 2

line display

26.

27. void setup() {

28.

29. pinMode(trigPin, OUTPUT); //read and store output

30. pinMode(echoPin, INPUT); //read and store input

31. lcd.init(); // initialize the lcd

32. lcd.init();

33. lcd.backlight();

34. }

35.

36. void loop() {

37.

38. digitalWrite(trigPin, LOW); //trigger object with delay of 2micsec

39. delayMicroseconds(2);

40. digitalWrite(trigPin, HIGH);

41. delayMicroseconds(10);

42. digitalWrite(trigPin, LOW);

43.

44. duration = pulseIn(echoPin, HIGH); //time taken for the wave to travel

45. distance = (duration * 0.034 / 2); //distance divided by 2 for incoming

46. // outgoing waves

47. lcd.setCursor(0, 1);

48. lcd.print(“Distance : “); //Display results

49. lcd.setCursor(11, 1);

50. lcd.print(distance);

51. lcd.setCursor(13, 1);

52. lcd.print(” cm “);

53. delay(1000);

54. lcd.clear();

55. }