Arduino Blind Stick

1/*
2 * make a smart stick that helps the Blind
3 */
4 #define trigPin  9
5 #define echoPin 8
6
7 #define Buzzer1 5//active
8 #define Buzzer2 7//passive
9  #define Led1 6//Vibration
10
11 
12int sound = 250;
13
14
15void setup() {
16  Serial.begin (9600);
17 pinMode(trigPin, OUTPUT);
18 pinMode(echoPin, INPUT);
19  pinMode(Buzzer1, OUTPUT);
20 pinMode(Buzzer2, OUTPUT);
21 pinMode(Led1, OUTPUT);
22}
23
24void  loop() {
25  Serial.begin(9600);
26
27  long duration, distance;
28  digitalWrite(trigPin,  LOW);
29  delay(2);
30  digitalWrite(trigPin, HIGH);
31  delay(10);
32  digitalWrite(trigPin,  LOW);
33  duration = pulseIn(echoPin, HIGH);
34  distance = (duration/2) / 29.1;
35  digitalWrite(Buzzer1, LOW);
36  digitalWrite(Buzzer2, LOW);
37  digitalWrite(Led1,  LOW);
38  
39  if (distance<40) {
40    digitalWrite(Led1, HIGH);
41    delay(2000);
42  }
43  if (distance<20) {
44    digitalWrite(Led1, HIGH);
45    delay(2000);
46    digitalWrite(Buzzer1, HIGH);
47    delay(2000);
48  }
49  if (distance<10)  {
50    digitalWrite(Led1, HIGH);
51    delay(2000);
52    digitalWrite(Buzzer1,  HIGH);
53    delay(2000);
54    digitalWrite(Buzzer2, HIGH);
55    delay(2000);
56  }
57  }
58
59