In this Corona pandemic everything must be contactless, So we try to make a Contactless Dustbin called Smart Dustbin.

This Smart Dustbin sense the person or object using Ultrasonic Sensor which send the message to Servo Motor using Arduino Uno.

When the person Comes closer to Smart Dustbin then the Dustbin Cap will automatically open for your waste and after some time it will automatically Close.

I am trying to explain all the process through a video

Contactless Hygiene Concept

The Smart Dustbin is more than just a convenience; it is a critical tool for public health and sanitation. By automating the lid mechanism, the system eliminates the need for any physical contact between the user and the bin, significantly reducing the spread of germs and viruses. This project demonstrates how simple robotics can solve real-world hygiene challenges in homes, offices, and hospitals.

Mechanical & Sensory Infrastructure

• Arduino UNO: Functions as the processor, coordinating high-speed sensor inputs with mechanical motor outputs.
• HC-SR04 Ultrasonic Sensor: Positioned at the front of the bin. It acts as an proximity trigger, measuring the distance to any approaching hand or object.
• SG90 Micro Servo: The mechanical actuator responsible for lifting the bin lid. It is connected to the lid via a small linkage system or wire.
• 9V Battery: Provides portable power, allowing the bin to be placed in any corner without being tethered to a wall outlet.

Operational Workflow and Logic

The system's behavior is governed by a precise timing loop:

1. The Sensing Loop: The Arduino constantly triggers the ultrasonic sensor. If an object is detected within the "Activation Zone" (typically 20-30 cm), the next stage begins.
2. The Opening Action: The Arduino sends a PWM (Pulse Width Modulation) signal to the Servo. The motor rotates to a specific angle (e.g., 90 degrees), which physically pushes the lid open.
3. The Holding Phase: A built-in delay (e.g., 3 to 5 seconds) keeps the lid in the open position, ensuring the user has enough time to dispose of their waste.
4. The Closing Sequence: Once the delay is over, the Servo rotates back to its starting position (0 degrees), closing the lid securely and automatically.

Why Robotics Matters in Waste Management

This project is an excellent introduction to Mechatronics—the combination of mechanics, electronics, and computing. It highlights the potential for small-scale automation to improve our daily quality of life and serves as a foundation for more complex waste management systems, such as automated sorting bins or municipal smart bins that report when they are full.