# Reimagining the Mundane Everyday objects should not be boring. **Monsta Can** is my solution to a simple question: "Can we make cleaning fun?" I engineered this device to transform a basic utility into an engaging IoT experience. By fusing precise sensor technology with a responsive web interface, Monsta Can does more than hold trash, it interacts with the user, tracks contributions, and gamifies environmental discipline.

The Monsta Can Web Interface (Mobile & Desktop)

--- ## ⚡️ Technical Specifications Built on the ESP32 platform, Monsta Can operates wirelessly and efficiently using the following stack: | Component | Specification | Role | | :--- | :--- | :--- | | **Microcontroller** | ESP32 | Home Wi Fi Web Server & Logic Core | | **Actuator** | TowerPro MG996R | High Torque Metal Gear Lid Mechanism | | **Sensors** | 2x Ultrasonic HC SR04 | Proximity & Object Detection | | **Display** | 4 Digit 7 Segment | Real time Drop Counter & Status | | **Power** | 3.7v Battery 20A | High Current Autonomous Power | | **Regulation** | 5v Step Up Module | Voltage Stabilization for Sensors | --- ## ⚙️ The Logic Engine The system utilizes a **Dual Sensor Architecture** to automate the workflow without user intervention. ### 1. Proximity Reflex The first ultrasonic sensor serves as the visual input for the system. * **Detection:** It continuously monitors the frontal area for user presence. * **Action:** When a user is detected within an exact **20 cm** threshold, the ESP32 triggers the servo to lift the lid instantly. ### 2. Gamification Logic A second sensor is mounted inside the chassis to track activity. * **Tracking:** It monitors the internal volume to detect when an object passes the opening. * **Logic:** The system increments a global counter, turning a routine chore into a high score chase. --- ## 🛠 Mechanical & Visual Engineering ### High Torque Actuation For reliable operation, I chose the **TowerPro MG996R** servo. Unlike standard hobby motors, this unit uses **metal gears** to provide the torque necessary for a crisp lid response. * **Mechanical Linkage:** The servo is mounted on the rear interior wall. It uses a custom linkage rod system to convert circular rotation into a linear vertical push. * **Motion Profile:** Upon trigger, the servo rotates **90°**, driving the rod upward to pivot the lid smoothly on its hinge. ### Real Time Feedback The front mounted **4 Digit 7 Segment Display** provides an immediate interface for the user. * **Live Scoreboard:** Displays the current drop count registered by the internal sensors. * **System Status:** Provides visual cues for battery levels and network connection status during startup. --- ## 📱 Network Connectivity & UI I configured the ESP32 to integrate with the **Home Wi Fi Network**. This allow the dashboard to be accessed from any authorized device via a local IP address.

The Monsta Can Web Interface (Mobile & Desktop)

* **Live Monitoring:** Check if the lid is locked or open from across the room. * **Data Analytics:** View total trash counts and daily activity with zero latency. * **Remote Control:** Full manual override capabilities to force open the lid or reset scores via the web dashboard.

MONSTA CAN - Gamified IoT Trash can

Overview