PROXIMITY_ALARM

1#define trigPin 13
2#define echoPin 12
3int buzz=8;
4int b;
5int  led=7;
6int a=2;
7int count =15;
8//int j;
9//#define led 11
10//#define  led2 10
11
12void setup() {
13  Serial.begin (9600);
14  
15  pinMode(led,OUTPUT);
16  pinMode(trigPin, OUTPUT);
17  pinMode(echoPin, INPUT);
18  //pinMode(led, OUTPUT);
19  // pinMode(led2, OUTPUT);
20}
21
22void loop() {
23
24  for(int i=0;i<2;i++)
25  { while(count>0)
26     {tone(buzz,500*count,300);
27      // j=(rand()%10);
28       delay(count*10);
29       count--;
30     }
31  }
32  long duration,  distance;
33  digitalWrite(trigPin, LOW);  // Added this line
34  delayMicroseconds(2);  // Added this line
35  digitalWrite(trigPin, HIGH);
36//  delayMicroseconds(1000);  - Removed this line
37  delayMicroseconds(10); // Added this line
38  digitalWrite(trigPin,  LOW);
39  duration = pulseIn(echoPin, HIGH);
40  distance = (duration/2) / 29.1;
41  // if (distance < 4) {  // This is where the LED On/Off happens
42 //   digitalWrite(led,HIGH);  // When the Red condition is met, the Green LED should turn off
43//  digitalWrite(led2,LOW);
44//}
45  // else {
46   // digitalWrite(led,LOW);
47    //digitalWrite(led2,HIGH);
48  // }
49  if (distance >= 300 || distance <= 0){
50   // Serial.println("Out of  range");
51 }
52  else {
53    //Serial.write(distance);
54    //Serial.println("  cm");
55    b=distance/10;
56 tone(buzz,10000,50);
57 digitalWrite(led, HIGH);
58  digitalWrite(led, LOW);
59
60 delay(b*70);
61  }
62 // delay(500);
63}
64
65
66
67