Arduino Blind Stick: Smart Proximity Sensor for the Visually Impaired

Necessary tools and machines

Tape, Scotch

Apps and online services

Arduino IDE

About this project

After seeing the blind people in the street pleasing people to help them walk on street.I felt sad for that, and then T started working on this project.

Code

• upload this code

upload this codeC/C++

/*
 * 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(trigPin, 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<20) {
    digitalWrite(Led1, HIGH);
    delay(2000);
    digitalWrite(Buzzer1, HIGH);
    delay(2000);
  }
  if (distance<10) {
    digitalWrite(Led1, HIGH);
    delay(2000);
    digitalWrite(Buzzer1, HIGH);
    delay(2000);
    digitalWrite(Buzzer2, HIGH);
    delay(2000);
  }
  }

   

Schematics