Smart Blind Man Walking Stick With Arduino Nano

Hi Friends.

Today we are going to make a small DIY project called Smart blind man walking stick for visually challenged persons.

Step 1: GRAB THE MATERIALS

Firstly We need to collect the required materials

Here are the parts we need to collect:

1)An Arduino nano

2)An Ultrasonic sensor(HCSR04)

3)A 9-volt Battery

4)A9-volt Battery connector

5)A Buzzer

6)Some jumper wires

7)A vibration motor

8)A switch

Other tools and parts used in this project:

3/4 inch PVC pipe

3/4 inch PVC elbow

Double side tape

Instant adhesive Glue

Step 2: CIRCUIT AND WIRING CONNECTIONS

Now its a time for wiring the Arduino!

Ultrasonic sensor VCC pin to Arduino 5V.

Ultrasonic sensor GND pin to Arduino GND.

Ultasonic sensor TRIG pin to Arduino D9.

Ultasonic sensor ECHO pin to Arduino D10.

Buzzer RED to Arduino D11.

Buzzer BLACK to Arduino GND.

Vibration motor pin 1 to Arduino D13.

Vibration motor pin 2 to Arduino GND.

9-volt battery RED to switch pin 1

9-volt battery BLACk to GND (-)

Switch pin 2 to Arduino Vin(+)

Step 3: Arduino Sketch

// defines pins numbers

const int trigPin = 9;

const int echoPin = 10;

const int buzzer =11;

const int motor = 13;

// defines variables

long duration;

int distance;

int safetyDistance;

void setup()

{

pinMode(trigPin, OUTPUT);

// Sets the trigPin as an Output

pinMode(echoPin, INPUT);

// Sets the echoPin as an Input

pinMode(buzzer, OUTPUT);

pinMode(motor, OUTPUT);

Serial.begin(9600);

// Starts the serial communication

}

void loop()

{

// Clears the trigPin

digitalWrite(trigPin, LOW);

delayMicroseconds(2);

// Sets the trigPin on HIGH state for 10 micro seconds

digitalWrite(trigPin, HIGH);

delayMicroseconds(10);

digitalWrite(trigPin, LOW);

// Reads the echoPin, returns the sound wave travel time in microseconds

duration = pulseIn(echoPin, HIGH);

// Calculating the distance

distance = duration * 0.034 / 2;

safetyDistance = distance;

if (safetyDistance <= 18)

{

digitalWrite(buzzer, HIGH);

digitalWrite(motor, HIGH);

}

else

{

digitalWrite(buzzer, LOW);

digitalWrite(motor, LOW);

}

// Prints the distance on the Serial Monitor

Serial.print("Distance: ");

Serial.println(distance);

}

Step 4: MAKE THE STICK and FIT THE CIRCUIT

First take a PVC pipe(3/4 inch) and cut a piece of length one and half meter

Take an ELBOW and fit it to one end of the pipe

Simply glue it.

I used a sponge to make the circuit 't and looks good

Step 5: FINAL OUTCOME

We made a Smart blind stick using Arduino nano:

Thanks for reading my instructable.

I hope you enjoyed it.

HAPPY MAKING!