Video Tutorial
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Description
Hai friends so here we are going to create a smart walking stick for blind persons. This stick contains a sensor which will detect any object in front of its path. with the help of an alarm, it will give an indication to the blind person. so thereby they can identify some objects are present in front of there path.
Components Required
| 1. | Arduino UNO | * 1 |
| 2. | Beeper | * 1 |
| 3. | Ultrasonic sensor | * 1 |
| 4. | Jumper Wires | |
| 5. | Bread Board | *1 |
Circuit Diagram
Beeper: Red wire - 2, brown wire - GND,
Sensor: VCC - 5V, GND-GND, Trig- 11, Echo- 12
Program
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void setup()
{
Serial.begin (9600);
pinMode(2,OUTPUT);
pinMode(10,OUTPUT);
pinMode(9,INPUT);
}
void loop()
{
long duration, distance;
digitalWrite(10, LOW);
delayMicroseconds(2);
digitalWrite(10, HIGH);
delayMicroseconds(10);
digitalWrite(10, LOW);
duration = pulseIn(9, HIGH);
distance = (duration/2) / 29.1;
Serial.print(distance);
Serial.println(" cm");
delay(200);
if (distance > 30)
{
digitalWrite(2,LOW);
delay(20);
}
if (distance < 30)
{
digitalWrite(2,HIGH);
delay(20);
}
}