Project Perspective

Smart Trash Can with Processing, 2 Arduinos and IR is a sophisticated and creative interaction project. By using two Arduinos and a specialized hardware setup, you'll learn about multi-device serial communication and real-time visualization with Processing.

Technical Implementation: Multi-Device Sync

The project focuses on creating a high-performance and reliable smart trash can:

• Sensing layer: Using an IR Obstacle Avoidance Sensor on the first Arduino, the system can accurately detect when an object is brought near the trash can's lid.
• Actuation layer: The first Arduino sends a signal to a second Arduino, which triggers a Micro Servo Motor (SG90) to physically open or close the trash can't lid.
• Visualization layer: Using Processing, you can create a graphical user interface (GUI) on your computer that shows the real-time status (OPEN/CLOSED) of the trash can and its history.

Hardware Infrastructure

• 2x Arduino Uno: These boards act as the main hubs for the sensing and actuation layers, coordinating all serial communication and hardware tasks.
• IR Obstacle Avoidance Sensor: Providing contactless infrared-based detection for objects near the lid.
• Micro Servo Motor (SG90): Providing the physical movement to open and close the trash can's lid mechanism.
• 9V Battery/Power Supply: Providing a stable power source for the entire trash can't electronics.
• Micro-USB Cable: Use to program both Arduinos directly from your computer for power and code.
• Jumper Wires: Connect all the components together.

Measurement and Execution Loop

The smart trash can is designed to be very efficient:

1. Initialize Arduinos: SETUP both Arduinos to communicate over serial with the Processing script.
2. Poll IR Sensor: The first Arduino constantly checks its IR sensor and sends a trigger signal to the second Arduino when an object is detected.
3. Servo Trigger: The second Arduino receives the trigger and rotates the servo to open the lid, waits for few seconds, then automatically closes it.
4. Visualization Sync: The Processing script listens for all status events and updates its GUI for the user in real-time.

Future Expansion

• OLED Identity Dashboard Integration: Add a small OLED display to the trash can to show the current trash level and the number of times it has been opened.
• Cloud Status Sink Registration: Add a WiFi module (ESP8266/ESP32) and link to a cloud dashboard to track trash pickup schedules and levels remotely.
• Advanced Servo Velocity Profile: Use specialized libraries to create smoother and more natural-looking opening and closing animations for the lid.
• Custom Pulse Alert Support: Add a small buzzer to give an audio alert each time the trash can't is opened or when it becomes full.

Smart Trash Can with Processing, 2 Arduinos and IR is a perfect project for any electronics enthusiast looking for a more interactive and engaging multi-device tool!