Published July 6, 2020 © MIT

Smart Shop Dispenser-Bot

I created a smart shop dispenser-Bot that will guide you to wash your hands for minimum 20 seconds.

AdvancedFull instructions provided309

Things used in this project

Hardware components

Solderless Breadboard Half Size

Cable Management Tool, Cable Tie Removal Tool with Cutter

Soldering iron

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Amazon Web Services Ultrasonic sensor HC-SR04

You need two arduino for it .

Amazon Web Services Arduino UNO

You need two ultrasonic for it .

Amazon Web Services Servo Motor

You need two servo motor for it .

Amazon Web Services MP3 player

Amazon Web Services Tactile Switch

Amazon Web Services Electric Wire

Story

I divided my making process in 3 steps.

FIRST STEP -

At first I made the structure of Smart Dispenser-Bot.

Now I will discuss how the hand wash drops automatically. First I install the Tower pro MG945 servo motor inside of the structure, then I used a string which I attach with the servo motor.

After that I placed the hand wash in the ground of the structure (back side) and put the string on the cap of hand wash bottle (Details given in pictures bellow). Then I attached the servo motor (Tower pro MG945) with a microcontroller (Arduino UNO) and I attached a Ultra sonic sensor (HC-SR04) with the same microcontroller (Arduino UNO) in front of the structure ( Details is given in pictures bellow ).

[Work process - When someone access their hand in the instructed place of the Smart Dispenser-Bot, then the ultra sonic sensor sense that hand and send a signal to the microcontroller

after that the microcontroller send a output signal to the servo motor to rotate 180 degree, for the rotation of servo motor the rope will got a pull and the liquid will come out from hand wash bottle.

SECOND STEP -

There is a servo motor in the structure which is pasted by the glue gun and I fixed a Tactile switch in the slide of servo motor. After that I connect a arduino with that servo motor.

Then I connect a MP3 Player with the tactile switch. When the servo motor rotates 180 degree then the tactile switch will activate MP3 player.

[ NOTE: I already insert a SD-card in the MP3 and a speech is already loaded in the SD-card.]

[ NOTE: Speech loading process - First you have to open google chrome and search 'TEXT TO SPEECH' then you have to go to the text and write a some specific text which you want as the speech,

then click on start and download it in your SD-card and insert in your MP3 player.]

[ NOTE: You can record your voice and use it ]

[If you don't want to use MP3 player then you have to use SD Module.]

THIRD STEP -

My model works in DC current, so I use a AC to DC converter (here I use a charger 5 volt 2 amp). First use a five pin plug and then insert the charger there. Now take two OTG cable and cut red and white wire separately and placed it parallel connection and connect with that charger. Now connect those two OTG

cable with those two arduino.

[ NOTE: You can use your power bank as power supply.]

PICTURE 1 - How i attached hand wash bottle with rope and servo motor

How i attached my ultrasonic sensors in the dispenser-bot

Video of Smart Shop Dispenser-Bot

Code

                                                                         //AARZOO ISLAM'S PROGRAMING
                                                                         
//this sketch is for smart shop dispenser to press the handwash with servo motor and glow the light....

#include <Servo.h> 
  
#define trigPin 7
 
#define echoPin 5

#define ledPin 13

Servo servo;

int sound = 250; 
 
void setup() { 
 
Serial.begin (9600); 
 
pinMode(trigPin, OUTPUT);
 
pinMode(echoPin, INPUT); 

pinMode(ledPin, OUTPUT);

servo.attach(8); 
  
} 
 
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 < 13) { 
 
Serial.println("the distance is less than 20"); 
 
servo.write(180);   //Servo ta kota ta khurbe  ( MP 100 )    created by Aarzoo

digitalWrite(ledPin, HIGH);

} 
 
else { 
 
servo.write(0);

digitalWrite(ledPin, LOW);

} 
 
if (distance > 60 || distance <= 0){   //object ta koto dure ale servo ta active hobe
 
Serial.println("The distance is more than 60");

}  
 
else { 
 
Serial.print(distance); 
 
Serial.println(" cm"); 

} 
 
delay(1000);    //Servo ta kotokhon por active hobe
 
}

                                                                        //AARZOO ISLAM'S PROGRAMMING
 
 #include <Servo.h>   //servo library
Servo servo;
int trigPin = 7;    
int echoPin = 5;   
int servoPin = 10;
int led= 13;
long duration, dist, average;   
long aver[3];   //array for average

void setup() {       
   Serial.begin(9600);
   servo.attach(servoPin);  
   pinMode(trigPin, OUTPUT);   
   pinMode(echoPin, INPUT);  
   servo.write(0);         //close cap on power on
   delay(100);
   servo.detach(); 
} 

void measure() {  
digitalWrite(10,HIGH);
digitalWrite(trigPin, LOW);
delayMicroseconds(5);
digitalWrite(trigPin, HIGH);
delayMicroseconds(15);
digitalWrite(trigPin, LOW);
pinMode(echoPin, INPUT);
duration = pulseIn(echoPin, HIGH);
dist = (duration/2) / 29.1;    //obtain distance
} 
void loop() { 
 for (int i=0;i<=2;i++) {   //average distance
   measure();               
  aver[i]=dist;            
   delay(10);     //delay between measurements    //servo ta koto khon por activate hobe...   // created by AARZOO ISLAM
 }
dist=(aver[0]+aver[1]+aver[2])/3;    

if ( dist<10) { //Distace ta koto hobe
servo.attach(servoPin);
delay(1);
servo.write(0);  
delay(33700);   
servo.write(150);    
delay(2000);  
servo.detach(); 
}
Serial.print(dist);
}

Credits

iaarzoo40

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Smart Shop Dispenser-Bot

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

Ultrasonic 1

Ultra sonic 2

Code

Ultrasonic 1

Ultra sonic 2

Credits

iaarzoo40

Comments

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Smart Shop Dispenser-Bot

Smart Shop Dispenser-Bot

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

Ultrasonic 1

Ultra sonic 2

Code

Ultrasonic 1

Ultra sonic 2

Credits

iaarzoo40

Comments

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