/*
*make a smart stick that helps the Blind
*/
#define trigPin 9
#define echoPin 8
#define Buzzer1 5 //active
#define Buzzer2 7 //passive
#define Led1 6 //Vibration
int sound=250;
void setup(){
  Serial.begin(9600);
  pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
pinMode(Buzzer1, OUTPUT);
pinMode(Buzzer2, OUTPUT);
pinMode(Led1, OUTPUT);
}

void loop(){
  Serial.begin(9600);
  long duration, distance;
  digitalWrite(trigPin, LOW);
  delay(2);
  digitalWrite(trigPin, HIGH);
  delay(10);
  digitalWrite(tridPin, LOW);
  duration=pulseIn(echoPin,HIGH);
  distance=(duration/2)/29.1;
  digitalWrite(Buzzer1, LOW);
  digitalWrite(Buzzer2, LOW);
  digitalWrite(Led1, LOW);
  if(distance<40){
    digitalWrite(Led1, HIGH);
    delay(2000);
    if(distance<10)
    digitalWrite(Led1, HIGH);
    delay(2000);
    digitalWrite(Buzzer1, HIGH);
    delay(2000);
    digitalWrite(Buzzer2, HIGH);
  }
}