covid-19 hand wash using arduino

An automatic soap dispenser is a device that dispenses a controlled amount of soap solution.

Sep 27, 2020

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Components and supplies

SG90 Micro-servo motor

Jumper wires (generic)

Breadboard (generic)

Ultrasonic Sensor - HC-SR04 (Generic)

Arduino UNO

Apps and platforms

Arduino IDE

Project description

Code

Untitled file

c_cpp

1const int servo = 3;
2const int trigPin = 10;
3const int echoPin =   11;
4
5// defines variables
6long duration;
7int distance;
8
9#include   <Servo.h>
10
11Servo myservo;  // create servo object to control a servo
12//   twelve servo objects can be created on most boards
13
14int pos = 0;    // variable   to store the servo position
15
16void setup() {
17  pinMode(trigPin, OUTPUT);   // Sets the trigPin as an Output
18  pinMode(echoPin, INPUT); // Sets the echoPin   as an Input
19  myservo.attach(servo);  // attaches the servo on pin 9 to the servo   object  
20  myservo.write(0);   // Sets Servo to initially 0 degrees 
21  Serial.begin(9600);   // Starts the serial communication
22}
23
24void loop() {
25    //
26    digitalWrite(trigPin,   LOW);
27    delayMicroseconds(2);
28    // Sets the trigPin on HIGH state for   10 micro seconds
29    digitalWrite(trigPin, HIGH);
30    delayMicroseconds(10);
31     digitalWrite(trigPin, LOW);
32    // Reads the echoPin, returns the sound wave   travel time in microseconds
33    duration = pulseIn(echoPin, HIGH);
34    //   Calculating the distance
35    distance= duration*0.034/2;
36    // Prints the   distance on the Serial Monitor
37    Serial.print("Distance: ");
38    Serial.println(distance);
39     //Servo
40    if(distance<10){ //Check distance is less than 10cm 
41       myservo.write(0);   // Sets Servo in stages from 0 to 180 degrees so soap does not pitch out. 
42       delay(100);
43        myservo.write(90);
44       delay(100);
45      myservo.write(135);
46        delay(100);
47       myservo.write(180); //Ajust how far you want the servo   to go.
48       delay(1000);
49       myservo.write(0); // Reset the servo to   0 Degrees
50       delay(3000);   //Delay the next time someone can get soap
51     }                 
52}
53

const int servo = 3;
const int trigPin = 10;
const int echoPin =   11;

// defines variables
long duration;
int distance;

#include   <Servo.h>

Servo myservo;  // create servo object to control a servo
//   twelve servo objects can be created on most boards

int pos = 0;    // variable   to store the servo position

void setup() {
  pinMode(trigPin, OUTPUT);   // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin   as an Input
  myservo.attach(servo);  // attaches the servo on pin 9 to the servo   object  
  myservo.write(0);   // Sets Servo to initially 0 degrees 
  Serial.begin(9600);   // Starts the serial communication
}

void loop() {
    //
    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;
    // Prints the   distance on the Serial Monitor
    Serial.print("Distance: ");
    Serial.println(distance);
     //Servo
    if(distance<10){ //Check distance is less than 10cm 
       myservo.write(0);   // Sets Servo in stages from 0 to 180 degrees so soap does not pitch out. 
       delay(100);
        myservo.write(90);
       delay(100);
      myservo.write(135);
        delay(100);
       myservo.write(180); //Ajust how far you want the servo   to go.
       delay(1000);
       myservo.write(0); // Reset the servo to   0 Degrees
       delay(3000);   //Delay the next time someone can get soap
     }                 
}

untitled

c_cpp

1const int servo = 3;
2const int trigPin = 10;
3const int echoPin =   11;
4
5// defines variables
6long duration;
7int distance;
8
9#include   <Servo.h>
10
11Servo myservo;  // create servo object to control a servo
12//   twelve servo objects can be created on most boards
13
14int pos = 0;    // variable   to store the servo position
15
16void setup() {
17  pinMode(trigPin, OUTPUT);   // Sets the trigPin as an Output
18  pinMode(echoPin, INPUT); // Sets the echoPin   as an Input
19  myservo.attach(servo);  // attaches the servo on pin 9 to the servo   object  
20  myservo.write(0);   // Sets Servo to initially 0 degrees 
21  Serial.begin(9600);   // Starts the serial communication
22}
23
24void loop() {
25    //
26    digitalWrite(trigPin,   LOW);
27    delayMicroseconds(2);
28    // Sets the trigPin on HIGH state for   10 micro seconds
29    digitalWrite(trigPin, HIGH);
30    delayMicroseconds(10);
31     digitalWrite(trigPin, LOW);
32    // Reads the echoPin, returns the sound wave   travel time in microseconds
33    duration = pulseIn(echoPin, HIGH);
34    //   Calculating the distance
35    distance= duration*0.034/2;
36    // Prints the   distance on the Serial Monitor
37    Serial.print("Distance: ");
38    Serial.println(distance);
39     //Servo
40    if(distance<10){ //Check distance is less than 10cm 
41       myservo.write(0);   // Sets Servo in stages from 0 to 180 degrees so soap does not pitch out. 
42       delay(100);
43        myservo.write(90);
44       delay(100);
45      myservo.write(135);
46        delay(100);
47       myservo.write(180); //Ajust how far you want the servo   to go.
48       delay(1000);
49       myservo.write(0); // Reset the servo to   0 Degrees
50       delay(3000);   //Delay the next time someone can get soap
51     }                 
52}
53
54
55
56

const int servo = 3;
const int trigPin = 10;
const int echoPin =   11;

// defines variables
long duration;
int distance;

#include   <Servo.h>

Servo myservo;  // create servo object to control a servo
//   twelve servo objects can be created on most boards

int pos = 0;    // variable   to store the servo position

void setup() {
  pinMode(trigPin, OUTPUT);   // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin   as an Input
  myservo.attach(servo);  // attaches the servo on pin 9 to the servo   object  
  myservo.write(0);   // Sets Servo to initially 0 degrees 
  Serial.begin(9600);   // Starts the serial communication
}

void loop() {
    //
    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;
    // Prints the   distance on the Serial Monitor
    Serial.print("Distance: ");
    Serial.println(distance);
     //Servo
    if(distance<10){ //Check distance is less than 10cm 
       myservo.write(0);   // Sets Servo in stages from 0 to 180 degrees so soap does not pitch out. 
       delay(100);
        myservo.write(90);
       delay(100);
      myservo.write(135);
        delay(100);
       myservo.write(180); //Ajust how far you want the servo   to go.
       delay(1000);
       myservo.write(0); // Reset the servo to   0 Degrees
       delay(3000);   //Delay the next time someone can get soap
     }                 
}

untitled

c_cpp

1const int servo = 3;
2const int trigPin = 10;
3const int echoPin =  11;
4
5// defines variables
6long duration;
7int distance;
8
9#include  <Servo.h>
10
11Servo myservo;  // create servo object to control a servo
12//  twelve servo objects can be created on most boards
13
14int pos = 0;    // variable  to store the servo position
15
16void setup() {
17  pinMode(trigPin, OUTPUT);  // Sets the trigPin as an Output
18  pinMode(echoPin, INPUT); // Sets the echoPin  as an Input
19  myservo.attach(servo);  // attaches the servo on pin 9 to the servo  object  
20  myservo.write(0);   // Sets Servo to initially 0 degrees 
21  Serial.begin(9600);  // Starts the serial communication
22}
23
24void loop() {
25    //
26    digitalWrite(trigPin,  LOW);
27    delayMicroseconds(2);
28    // Sets the trigPin on HIGH state for  10 micro seconds
29    digitalWrite(trigPin, HIGH);
30    delayMicroseconds(10);
31    digitalWrite(trigPin, LOW);
32    // Reads the echoPin, returns the sound wave  travel time in microseconds
33    duration = pulseIn(echoPin, HIGH);
34    //  Calculating the distance
35    distance= duration*0.034/2;
36    // Prints the  distance on the Serial Monitor
37    Serial.print("Distance: ");
38    Serial.println(distance);
39    //Servo
40    if(distance<10){ //Check distance is less than 10cm 
41       myservo.write(0);  // Sets Servo in stages from 0 to 180 degrees so soap does not pitch out. 
42       delay(100);
43       myservo.write(90);
44       delay(100);
45      myservo.write(135);
46       delay(100);
47       myservo.write(180); //Ajust how far you want the servo  to go.
48       delay(1000);
49       myservo.write(0); // Reset the servo to  0 Degrees
50       delay(3000);   //Delay the next time someone can get soap
51    }                 
52}
53
54
55
56

const int servo = 3;
const int trigPin = 10;
const int echoPin =  11;

// defines variables
long duration;
int distance;

#include  <Servo.h>

Servo myservo;  // create servo object to control a servo
//  twelve servo objects can be created on most boards

int pos = 0;    // variable  to store the servo position

void setup() {
  pinMode(trigPin, OUTPUT);  // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin  as an Input
  myservo.attach(servo);  // attaches the servo on pin 9 to the servo  object  
  myservo.write(0);   // Sets Servo to initially 0 degrees 
  Serial.begin(9600);  // Starts the serial communication
}

void loop() {
    //
    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;
    // Prints the  distance on the Serial Monitor
    Serial.print("Distance: ");
    Serial.println(distance);
    //Servo
    if(distance<10){ //Check distance is less than 10cm 
       myservo.write(0);  // Sets Servo in stages from 0 to 180 degrees so soap does not pitch out. 
       delay(100);
       myservo.write(90);
       delay(100);
      myservo.write(135);
       delay(100);
       myservo.write(180); //Ajust how far you want the servo  to go.
       delay(1000);
       myservo.write(0); // Reset the servo to  0 Degrees
       delay(3000);   //Delay the next time someone can get soap
    }                 
}

Untitled file

c_cpp

1const int servo = 3;
2const int trigPin = 10;
3const int echoPin =  11;
4
5// defines variables
6long duration;
7int distance;
8
9#include  <Servo.h>
10
11Servo myservo;  // create servo object to control a servo
12//  twelve servo objects can be created on most boards
13
14int pos = 0;    // variable  to store the servo position
15
16void setup() {
17  pinMode(trigPin, OUTPUT);  // Sets the trigPin as an Output
18  pinMode(echoPin, INPUT); // Sets the echoPin  as an Input
19  myservo.attach(servo);  // attaches the servo on pin 9 to the servo  object  
20  myservo.write(0);   // Sets Servo to initially 0 degrees 
21  Serial.begin(9600);  // Starts the serial communication
22}
23
24void loop() {
25    //
26    digitalWrite(trigPin,  LOW);
27    delayMicroseconds(2);
28    // Sets the trigPin on HIGH state for  10 micro seconds
29    digitalWrite(trigPin, HIGH);
30    delayMicroseconds(10);
31    digitalWrite(trigPin, LOW);
32    // Reads the echoPin, returns the sound wave  travel time in microseconds
33    duration = pulseIn(echoPin, HIGH);
34    //  Calculating the distance
35    distance= duration*0.034/2;
36    // Prints the  distance on the Serial Monitor
37    Serial.print("Distance: ");
38    Serial.println(distance);
39    //Servo
40    if(distance<10){ //Check distance is less than 10cm 
41       myservo.write(0);  // Sets Servo in stages from 0 to 180 degrees so soap does not pitch out. 
42       delay(100);
43       myservo.write(90);
44       delay(100);
45      myservo.write(135);
46       delay(100);
47       myservo.write(180); //Ajust how far you want the servo  to go.
48       delay(1000);
49       myservo.write(0); // Reset the servo to  0 Degrees
50       delay(3000);   //Delay the next time someone can get soap
51    }                 
52}
53

const int servo = 3;
const int trigPin = 10;
const int echoPin =  11;

// defines variables
long duration;
int distance;

#include  <Servo.h>

Servo myservo;  // create servo object to control a servo
//  twelve servo objects can be created on most boards

int pos = 0;    // variable  to store the servo position

void setup() {
  pinMode(trigPin, OUTPUT);  // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin  as an Input
  myservo.attach(servo);  // attaches the servo on pin 9 to the servo  object  
  myservo.write(0);   // Sets Servo to initially 0 degrees 
  Serial.begin(9600);  // Starts the serial communication
}

void loop() {
    //
    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;
    // Prints the  distance on the Serial Monitor
    Serial.print("Distance: ");
    Serial.println(distance);
    //Servo
    if(distance<10){ //Check distance is less than 10cm 
       myservo.write(0);  // Sets Servo in stages from 0 to 180 degrees so soap does not pitch out. 
       delay(100);
       myservo.write(90);
       delay(100);
      myservo.write(135);
       delay(100);
       myservo.write(180); //Ajust how far you want the servo  to go.
       delay(1000);
       myservo.write(0); // Reset the servo to  0 Degrees
       delay(3000);   //Delay the next time someone can get soap
    }                 
}

untitled

c_cpp

1const int servo = 3;
2const int trigPin = 10;
3const int echoPin =
4  11;
5
6// defines variables
7long duration;
8int distance;
9
10#include
11  <Servo.h>
12
13Servo myservo;  // create servo object to control a servo
14//
15  twelve servo objects can be created on most boards
16
17int pos = 0;    // variable
18  to store the servo position
19
20void setup() {
21  pinMode(trigPin, OUTPUT);
22  // Sets the trigPin as an Output
23  pinMode(echoPin, INPUT); // Sets the echoPin
24  as an Input
25  myservo.attach(servo);  // attaches the servo on pin 9 to the servo
26  object  
27  myservo.write(0);   // Sets Servo to initially 0 degrees 
28  Serial.begin(9600);
29  // Starts the serial communication
30}
31
32void loop() {
33    //
34    digitalWrite(trigPin,
35  LOW);
36    delayMicroseconds(2);
37    // Sets the trigPin on HIGH state for
38  10 micro seconds
39    digitalWrite(trigPin, HIGH);
40    delayMicroseconds(10);
41
42    digitalWrite(trigPin, LOW);
43    // Reads the echoPin, returns the sound wave
44  travel time in microseconds
45    duration = pulseIn(echoPin, HIGH);
46    //
47  Calculating the distance
48    distance= duration*0.034/2;
49    // Prints the
50  distance on the Serial Monitor
51    Serial.print("Distance: ");
52    Serial.println(distance);
53
54    //Servo
55    if(distance<10){ //Check distance is less than 10cm 
56       myservo.write(0);
57  // Sets Servo in stages from 0 to 180 degrees so soap does not pitch out. 
58       delay(100);
59
60       myservo.write(90);
61       delay(100);
62      myservo.write(135);
63
64       delay(100);
65       myservo.write(180); //Ajust how far you want the servo
66  to go.
67       delay(1000);
68       myservo.write(0); // Reset the servo to
69  0 Degrees
70       delay(3000);   //Delay the next time someone can get soap
71
72    }                 
73}
74
75
76
77

const int servo = 3;
const int trigPin = 10;
const int echoPin =
  11;

// defines variables
long duration;
int distance;

#include
  <Servo.h>

Servo myservo;  // create servo object to control a servo
//
  twelve servo objects can be created on most boards

int pos = 0;    // variable
  to store the servo position

void setup() {
  pinMode(trigPin, OUTPUT);
  // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin
  as an Input
  myservo.attach(servo);  // attaches the servo on pin 9 to the servo
  object  
  myservo.write(0);   // Sets Servo to initially 0 degrees 
  Serial.begin(9600);
  // Starts the serial communication
}

void loop() {
    //
    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;
    // Prints the
  distance on the Serial Monitor
    Serial.print("Distance: ");
    Serial.println(distance);

    //Servo
    if(distance<10){ //Check distance is less than 10cm 
       myservo.write(0);
  // Sets Servo in stages from 0 to 180 degrees so soap does not pitch out. 
       delay(100);

       myservo.write(90);
       delay(100);
      myservo.write(135);

       delay(100);
       myservo.write(180); //Ajust how far you want the servo
  to go.
       delay(1000);
       myservo.write(0); // Reset the servo to
  0 Degrees
       delay(3000);   //Delay the next time someone can get soap

    }                 
}

Downloadable files

diagram_sibdi9lGVH.png

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