Published August 30, 2021

Touch Free Dustbin Using Arduino Uno

Are you tired of touching public dustbins while throwing away trash? If so, here's a simple solution: A touch-free, smart dustbin.

BeginnerFull instructions provided988

Things used in this project

Hardware components

Arduino UNO

SG90 Micro-servo motor

Ultrasonic Sensor - HC-SR04 (Generic)

9V battery (generic)

Jumper wires (generic)

Hand tools and fabrication machines

Hot glue gun (generic)

Story

Story:

None of us like using swing dustbins especially when they are used by a large number of people in places such as cafeterias, parks, public bathrooms etc. For my build, I wanted to come up with a solution for this problem.

The smart, touch-free dustbin opens automatically with the wave of a hand, eliminating any contact with unhygienic, germ-ridden surfaces. This can be used in busy locations to create a safer and cleaner environment.

Working Mechanism:

An ultrasonic sensor is present outside the dustbin that detects any object in its proximity. When an object comes within range of the ultrasonic sensor, the servo motor rotates by 180 degrees-allowing the lid of the dustbin to open. A coin, attached to the extension of the servo motor via a string acts as the lever for the open-close mechanism. The lid of the dustbin closes after a short period of time.

NOTE:

1)Make sure that the servo motor is attached to the lid of the dustbin properly as this acts as the lever for the entire mechanism. If not, the lid may not open and close properly. Hot melt glue gun or super glue are pretty useful for this.

2) The Arduino board, battery and wiring is fixed inside the dustbin. After fixing them, enclose these components in plastic to prevent contact with waste.

Circuit Diagram:

The circuit diagram is given below. It has only two major components(ultrasonic sensor and servo motor) apart from the Arduino Uno board and is simple to build.

Video:

Conclusion:

This was a simple project which used readily available materials and was easy to make and solved an everyday problem. In this project, the lid of the dustbin always stays closed so that waste is not exposed and when waste needs to be disposed, the lid will automatically open.

Untitled file

#include <Servo.h>   //servo library
Servo servo;     
int trigPin = 5;    
int echoPin = 6;   
int servoPin = 7;
int led= 10;
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
  }
 dist=(aver[0]+aver[1]+aver[2])/3;    

if ( dist<50 ) {
//Change distance as per your need
 servo.attach(servoPin);
  delay(1);
 servo.write(0);  
 delay(3000);       
 servo.write(150);    
 delay(1000);
 servo.detach();      
}
Serial.print(dist);
}

Touch Free Dustbin Using Arduino Uno

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Story:

Video:

Conclusion:

Code

Untitled file

Credits

irakhare19

Comments

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Touch Free Dustbin Using Arduino Uno

Touch Free Dustbin Using Arduino Uno

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Story:

Video:

Conclusion:

Code

Untitled file

Credits

irakhare19

Comments

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