Modernised Safe Car

1#include <LiquidCrystal.h> //Load Liquid Crystal Library
2LiquidCrystal  LCD(10, 9, 5, 4, 3, 2);  //Create Liquid Crystal Object called LCD
3
4
5int  trigPin = 13;
6int echoPin = 11;
7float soundSpeed = 1230.20;
8float distance;
9float  pingTime;
10int buzpin=6;
11
12void setup() {
13 
14  LCD.begin(16,2); //Tell  Arduino to start your 16 column 2 row LCD
15  LCD.setCursor(0,0);  //Set LCD cursor  to upper left corner, column 0, row 0
16  Serial.begin(9600);
17  pinMode(trigPin,  OUTPUT);
18  pinMode(echoPin, INPUT);
19  pinMode(buzpin, OUTPUT);
20
21
22
23}
24
25void  loop() {
26  LCD.setCursor(0,0);
27  LCD.print("Distance is:");
28  digitalWrite(trigPin,  LOW);
29  delayMicroseconds(2000);
30  digitalWrite(trigPin, HIGH);
31  delayMicroseconds(15);
32  digitalWrite(trigPin, LOW);
33  delayMicroseconds(10);
34
35  pingTime = pulseIn(echoPin,  HIGH);
36
37  pingTime = pingTime/1000000.;
38  pingTime = pingTime/3600.;
39  distance = pingTime*soundSpeed;
40  distance=distance/2;
41  distance=distance*100000;
42  delay(100);
43  LCD.print(distance);
44  if(distance<=10){
45    analogWrite(buzpin,  400);
46  }
47  if(distance<=5){
48    analogWrite(buzpin, 1000);
49  }
50  if(distance>10){
51    analogWrite(buzpin, 0);
52  }
53  
54
55}
56
57