Smart stick for the visually impaired

Smart stick that will help visually impaired to identify obstacles.

Aug 15, 2022

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visually impaired

smart stick for the visually i

Components and supplies

Solderless Breadboard Full Size

Arduino UNO

Buzzer

5 mm LED: Red

USB-A to B Cable

Grove - Vibration Motor

Ultrasonic Sensor - HC-SR04 (Generic)

Resistor 330 ohm

Male/Female Jumper Wires

Male/Male Jumper Wires

Apps and platforms

Arduino IDE

Project description

Code

Arduino Uno code of smart stick.

c_cpp

The program is quite simple and understandable.

1//Smart stick for the visually impaired
2/* 
3<--connection With Arduino  Uno R3-->
4
5HC-SR04 Ultrasonic Sensor: 
6 #VCC--> +5V
7 #TRIG--> D13
8  #ECHO--> D12
9 #GND--> pin to ground
10 
11 Buzzeer:
12 positive(+)--> D10
13  negative(-)--> pin to ground
14 
15 Vibration Motor:
16 positive(+)--> D7
17  negative(-)--> pin to ground
18 
19 LED:
20 positive(+)--> D2
21 negative(-)-->  pin to ground
22 
23 */
24
25long cm,duration;
26    
27
28void setup(){
29  Serial.begin(9600);
30  pinMode(13,OUTPUT); // TrigPin
31  pinMode(12,INPUT);  // EchoPin
32  pinMode(10,OUTPUT); // Buzzer
33  pinMode(2,OUTPUT);  // LED  As a indicaor
34  pinMode(7,OUTPUT);  // Vibration Motor
35
36
37}
38void loop()  {
39 
40digitalWrite(13,LOW); //Trig Off
41delayMicroseconds(20);
42digitalWrite(13,HIGH);//Trig  ON
43delayMicroseconds(20);
44digitalWrite(13,LOW);//Trig Off
45delayMicroseconds(20);
46  
47digitalWrite(2,HIGH); 
48    
49duration = pulseIn(12, HIGH); //To receive  the reflected signal.
50Serial.println(duration);  
51cm = duration*0.034/2;
52Serial.println(cm);
53
54    
55    
56  if ((cm<100))
57  {
58    tone(10,3000);
59    digitalWrite(7,HIGH);
60    delay(500);
61    noTone(10);
62    delay(30);
63  }
64  else{
65    
66  digitalWrite(7,LOW);
67  }
68  delay(50);
69  
70}

//Smart stick for the visually impaired
/* 
<--connection With Arduino  Uno R3-->

HC-SR04 Ultrasonic Sensor: 
 #VCC--> +5V
 #TRIG--> D13
  #ECHO--> D12
 #GND--> pin to ground
 
 Buzzeer:
 positive(+)--> D10
  negative(-)--> pin to ground
 
 Vibration Motor:
 positive(+)--> D7
  negative(-)--> pin to ground
 
 LED:
 positive(+)--> D2
 negative(-)-->  pin to ground
 
 */

long cm,duration;
    

void setup(){
  Serial.begin(9600);
  pinMode(13,OUTPUT); // TrigPin
  pinMode(12,INPUT);  // EchoPin
  pinMode(10,OUTPUT); // Buzzer
  pinMode(2,OUTPUT);  // LED  As a indicaor
  pinMode(7,OUTPUT);  // Vibration Motor


}
void loop()  {
 
digitalWrite(13,LOW); //Trig Off
delayMicroseconds(20);
digitalWrite(13,HIGH);//Trig  ON
delayMicroseconds(20);
digitalWrite(13,LOW);//Trig Off
delayMicroseconds(20);
  
digitalWrite(2,HIGH); 
    
duration = pulseIn(12, HIGH); //To receive  the reflected signal.
Serial.println(duration);  
cm = duration*0.034/2;
Serial.println(cm);

    
    
  if ((cm<100))
  {
    tone(10,3000);
    digitalWrite(7,HIGH);
    delay(500);
    noTone(10);
    delay(30);
  }
  else{
    
  digitalWrite(7,LOW);
  }
  delay(50);
  
}

Arduino Uno code of smart stick.

c_cpp

The program is quite simple and understandable.

1//Smart stick for the visually impaired
2/* 
3<--connection With Arduino   Uno R3-->
4
5HC-SR04 Ultrasonic Sensor: 
6 #VCC--> +5V
7 #TRIG--> D13
8   #ECHO--> D12
9 #GND--> pin to ground
10 
11 Buzzeer:
12 positive(+)--> D10
13   negative(-)--> pin to ground
14 
15 Vibration Motor:
16 positive(+)--> D7
17   negative(-)--> pin to ground
18 
19 LED:
20 positive(+)--> D2
21 negative(-)-->   pin to ground
22 
23 */
24
25long cm,duration;
26    
27
28void setup(){
29   Serial.begin(9600);
30  pinMode(13,OUTPUT); // TrigPin
31  pinMode(12,INPUT);   // EchoPin
32  pinMode(10,OUTPUT); // Buzzer
33  pinMode(2,OUTPUT);  // LED   As a indicaor
34  pinMode(7,OUTPUT);  // Vibration Motor
35
36
37}
38void loop()   {
39 
40digitalWrite(13,LOW); //Trig Off
41delayMicroseconds(20);
42digitalWrite(13,HIGH);//Trig   ON
43delayMicroseconds(20);
44digitalWrite(13,LOW);//Trig Off
45delayMicroseconds(20);
46   
47digitalWrite(2,HIGH); 
48    
49duration = pulseIn(12, HIGH); //To receive   the reflected signal.
50Serial.println(duration);  
51cm = duration*0.034/2;
52Serial.println(cm);
53
54     
55    
56  if ((cm<100))
57  {
58    tone(10,3000);
59    digitalWrite(7,HIGH);
60     delay(500);
61    noTone(10);
62    delay(30);
63  }
64  else{
65    
66   digitalWrite(7,LOW);
67  }
68  delay(50);
69  
70}

//Smart stick for the visually impaired
/* 
<--connection With Arduino   Uno R3-->

HC-SR04 Ultrasonic Sensor: 
 #VCC--> +5V
 #TRIG--> D13
   #ECHO--> D12
 #GND--> pin to ground
 
 Buzzeer:
 positive(+)--> D10
   negative(-)--> pin to ground
 
 Vibration Motor:
 positive(+)--> D7
   negative(-)--> pin to ground
 
 LED:
 positive(+)--> D2
 negative(-)-->   pin to ground
 
 */

long cm,duration;
    

void setup(){
   Serial.begin(9600);
  pinMode(13,OUTPUT); // TrigPin
  pinMode(12,INPUT);   // EchoPin
  pinMode(10,OUTPUT); // Buzzer
  pinMode(2,OUTPUT);  // LED   As a indicaor
  pinMode(7,OUTPUT);  // Vibration Motor


}
void loop()   {
 
digitalWrite(13,LOW); //Trig Off
delayMicroseconds(20);
digitalWrite(13,HIGH);//Trig   ON
delayMicroseconds(20);
digitalWrite(13,LOW);//Trig Off
delayMicroseconds(20);
   
digitalWrite(2,HIGH); 
    
duration = pulseIn(12, HIGH); //To receive   the reflected signal.
Serial.println(duration);  
cm = duration*0.034/2;
Serial.println(cm);

     
    
  if ((cm<100))
  {
    tone(10,3000);
    digitalWrite(7,HIGH);
     delay(500);
    noTone(10);
    delay(30);
  }
  else{
    
   digitalWrite(7,LOW);
  }
  delay(50);
  
}

Downloadable files

chematic diagram of smart stick

Refer to the schematic diagram given below, it will help you to understand the connection.

chematic diagram of smart stick

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ashish80

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