Smart Dustbin using Arduino

Introduction

In this article, we will be looking at how to make a smart dustbin using Arduino, an ultrasonic sensor, and an SG-90 servo motor. Let's start!

Hardware Required

We will need the following components for making the smart dustbin

1. Arduino Uno
2. Ultrasonic Sensor- HC-SR-04
3. SG-90 Servo
4. Jumper Wires

If you don't have any of the hardware then you can click on the required component name and buy it from our store.

1. Arduino Uno

It is a development board used to do all the processing.

2. Ultrasonic Sensor HC-SR-04

It is used as an object detection sensor. It is used to measure the distance of the object from the sensor.

3. SG-90 Servo

A Servo motor is used for moving the dust bin lid.

4. Jumper Wires

Used to do circuit connections between different components.

Working Principle

Smart Dustbin works on the principle of object detection using an ultrasonic sensor.  The ultrasonic sensor transmits sound waves. These waves get reflected whenever an object comes into the vicinity of the sensor. This generates an electrical signal which is used to open the dustbin lid.

Circuit Diagram

Make the connections as shown in the diagram below.

Program Code

/*
  SMART DUSTBIN ARDUINO CODE

  Lid of the dustbin gets opened when a person comes in range of 30cm in front of the dustbin
*/

#include   //INCLUDES SERVO LIBRARY

Servo servo;
int trigPin = 5;
int echoPin = 6;
int servoPin = 9;
long duration, distance, average;
long averDist[3];

void setup() {
  Serial.begin(9600);
  servo.attach(servoPin);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  servo.write(0); //CLOSES CAP ON STARTING
  delay(100);
  servo.detach();
}

void measure() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(5);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(15);
  digitalWrite(trigPin, LOW);
  pinMode(echoPin, INPUT);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration / 2) / 29.1; //CALCULATES DISTANCE
}

void loop() {
  Serial.println(distance);   
  for (int i = 0; i <= 2; i++) { //CALCULATES AVERAGE DISTANCE
    measure();
    averDist[i] = distance;
    delay(10);
  }
  distance = (averDist[0] + averDist[1] + averDist[2]) / 3;

  if ( distance <= 30 ) {
    servo.attach(servoPin);
    delay(1);
    servo.write(180);
    delay(3500);
  }
  else
    servo.write(0);
    delay(1500);

    servo.detach();

}

Servo servo;

This creates servo object.

The above lines assign trigger and echo pins of the ultrasonic sensor to 5 and 6 respectively. Servo’s PWM pin is connected to pin 9 of Arduino.

long duration, distance, average;
long averDist[3];

These are the variables created for storing and processing data from ultrasonic sensor.

servo. Attach (servoPin) - attaches the servo variable which we created initially to the servo pin, set trigger and echo pins as Output and Input respectively, close the lid of the dustbin by setting servo to 0 positions, and then detach the servo object.

Measure function calculates the distance and average calculates the average of 3 distances measured by ultrasonic sensor.

If the distance is less than 30 then the dustbin lid is opened by setting the servo to 180 position otherwise the dustbin’s lid is closed.

Conclusion

In this blog post, we have learned building a Smart Dustbin using Arduino is a fun and creative project that not only helps keep your surroundings clean but also enhances your tech skills. With the help of ultrasonic sensors and wireless communication, you can make your daily chores more efficient and eco-friendly. So why wait? Grab your Arduino kit and start building your own Smart Dustbin today! So take your first step towards becoming a tech-savvy and environmentally conscious individual. Start your journey towards a cleaner and smarter future today with this exciting project.

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Please do check out other blog posts about Interfacing ACS712 with Arduino , Arduino Interfacing with Ultrasonic Sensor , LED Interfacing with Arduino , Interfacing GSM Module with Arduino , Interfacing MAX30100 Pulse Oximeter with Arduino , IR Sensor Interfacing with Arduino , How to connect ZMPT101B to Arduino and  How to use Buzzer with Arduino.

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