Wearable Gadget For the Blind

By

J.Sumitra

E.Amitej Goud

N.S.S.Koushik

Code:

const int pingTrigPin = 12; //Trigger connected to PIN 7

const int pingEchoPin = 10; //Echo connected yo PIN 8

int buz=5; //Buzzer to PIN 4

void setup() {

Serial.begin(9600);

pinMode(buz, OUTPUT);

}

void loop()

{

long duration, cm;

pinMode(pingTrigPin, OUTPUT);

digitalWrite(pingTrigPin, LOW);

delayMicroseconds(2);

digitalWrite(pingTrigPin, HIGH);

delayMicroseconds(5);

digitalWrite(pingTrigPin, LOW);

pinMode(pingEchoPin, INPUT);

duration = pulseIn(pingEchoPin, HIGH);

cm = microsecondsToCentimeters(duration);

if(cm<=50 && cm>0)

{

int d= map(cm, 1, 100, 20, 2000);

digitalWrite(buz, HIGH);

delay(100);

digitalWrite(buz, LOW);

delay(d);

}

Serial.print(cm);

Serial.print("cm");

Serial.println();

delay(100);

}

long microsecondsToCentimeters(long microseconds)

{

return microseconds / 29 / 2;

}