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Blind Stick is an intelligent device which can automatically detect the obstacle in front of the person and give him a response to the person by vibrating the stick and also with a warning sound. Through this, the blind person can aware about the obstacles in front of him. Using this smart blind stick, a visually impaired person can walk without anyone's help.

Components Required

1. An Arduino Uno

2. A Buzzer

3. An Ultrasonic Sensor

4. A 9V Battery

5. A Stick

6. A Toggle Switch

7. LED

8. A Mini breadboard

9. A 9V Battery connector

10. DC Male Power Jack

11. Jumper Wire

Programming Arduino for Blind Stick

#define trigPin 13

#define echoPin 12

#define motor 7

#define buzzer 6

void setup()

{

pinMode(trigPin, OUTPUT);

pinMode(echoPin, INPUT);

pinMode(motor, OUTPUT);

pinMode(buzzer,OUTPUT);

}

void loop()

{

long duration, distance;

digitalWrite(trigPin, LOW);

delayMicroseconds(2);

digitalWrite(trigPin, HIGH);

delayMicroseconds(10);

digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);

distance = (duration/2) / 29.1;

if (distance < 70)// This is where checking the distanceyou can change the value

{

digitalWrite(motor,HIGH); // When the the distance below 100cm

digitalWrite(buzzer,HIGH);

} else

{

digitalWrite(motor,LOW);// when greater than 100cm

digitalWrite(buzzer,LOW);

} delay(500);

}

Applications

· The system can be used both indoor and outdoor navigation.

· Blind person’s location can be tracked whenever needed which will ensure additional safety.

· Detects obstacles and alerts the blind person through vibration alert and speech output.