Smart Dustbin Using Arduino

A smart, contactless dustbin that automatically opens its lid when it detects someone nearby, making waste disposal more hygienic and convenient.

Overview

This project implements a Smart Dustbin using Arduino, an ultrasonic sensor, and a servo motor. The dustbin detects the presence of a hand or object near its lid and opens automatically, closing after a short delay. This system promotes hygiene by reducing the need for physical contact with the dustbin lid[4][5][2].

Features

• Automatic Lid Opening: Uses an ultrasonic sensor to detect objects within a preset range and triggers the lid to open via a servo motor.
• Hands-Free Operation: Enhances hygiene and convenience by eliminating the need to touch the dustbin.
• Easy to Build: Uses readily available components and straightforward Arduino code.
• Customizable: Detection range and lid open duration can be adjusted in the code[5].

Components Used

• Arduino Uno (or compatible)
• Ultrasonic Sensor (HC-SR04)
• Servo Motor (SG90 or similar)
• Jumper Wires
• 9V Battery or suitable power supply
• Dustbin with attached lid
• Miscellaneous: Cardboard, tape/glue for mounting components[4][5].

How It Works

1. Detection: The ultrasonic sensor continuously measures the distance to any object in front of the dustbin.
2. Trigger: When an object (e.g., a hand) is detected within a certain range (e.g., 2–30 cm), the Arduino receives the signal.
3. Action: The Arduino commands the servo motor to open the dustbin lid.
4. Auto-Close: After a short delay (e.g., 3 seconds), the lid closes automatically[4][5].

Circuit Diagram

• Ultrasonic Sensor:
  • VCC → 5V on Arduino
  • GND → GND on Arduino
  • Trig → Digital Pin (e.g., 5)
  • Echo → Digital Pin (e.g., 6)
• Servo Motor:
  • Signal → Digital Pin (e.g., 7)
  • VCC → 3.3V or 5V
  • GND → GND
• Power:
  • 9V battery connected to Vin and GND on Arduino[5].

Getting Started

1. Clone the Repository:

   git clone https://github.com/Prajjwal2051/SmartDustbinUsingArduino.git

2. Assemble the Hardware:
   Connect the ultrasonic sensor and servo motor to the Arduino as per the circuit diagram.
3. Upload the Code:
   Open the Arduino IDE, load the provided code, and upload it to your Arduino board.
4. Power Up:
   Attach the battery or connect via USB. Test the system by moving your hand near the sensor.

Customization

• Detection Range:
  Adjust the threshold distance in the code to change how close an object must be to trigger the lid.
• Lid Open Time:
  Modify the delay in the code to keep the lid open for a longer or shorter duration[5].

Benefits

• Improved Hygiene: No need to touch the lid, reducing the spread of germs[4].
• Convenience: Effortless waste disposal.
• Educational: Great project for learning about sensors, Arduino programming, and automation.