Humidity Monitoring System Using Arduino Mega
Welcome to this beginner-friendly tutorial by Madras Academy, where you'll build a Humidity Monitoring System using Arduino Mega and the DHT11 sensor, with a twist—an LED alert system that turns on when humidity crosses a threshold. This project is perfect for students and enthusiasts who want to learn how sensors trigger outputs like LEDs, preparing you for automation systems, gardens, or stations.
👉 Use the tabs below to navigate through the project:
- Project Info & Demo: Watch the finished result and learn what you’ll build.
- Wiring & Code: Get the circuit diagram, list of components, and the complete Arduino code.
- Notebook & Help: Access a printable project log and get troubleshooting tips.
📌 Project Information
- Title: Humidity Monitoring System Using Arduino Mega
- Difficulty: Easy
- Build Time: 15-20 minutes
- Skills Gained: Sensor integration, controlling LEDs, basic coding
🎬 Demo Video
Watch the project in action below:
🧰 Components List
Before diving into the wiring and code, let’s first review the essential components required for this project:
Essential components:
- Arduino Mega: The microcontroller board for controlling the system.
- DHT11 Sensor: A sensor for reading temperature and humidity levels.
- LED: To provide a visual alert when humidity crosses a threshold.
- 220 ohm Resistor: To protect the LED from excess current.
- Breadboard & Jumper Wires: For connecting everything together.
- USB Cable: For uploading the code to the Arduino.
🔌 Circuit Diagram
Connect the DHT11 sensor to the Arduino Mega, ensuring the following connections:
📘 Project Notebook Template
- Project Title:
- Date:
- My Objective:
- Materials I Used:
- Circuit Diagram:
- My Custom Alert Idea:
- What I Learned:
- Challenges I Solved:
🛠 Troubleshooting Tips
- ✅ Ensure the DHT11 sensor is correctly wired to the Arduino.
- ✅ Double-check your LED wiring and resistor placement.
- ✅ If readings fail, test the DHT11 sensor independently.
- ✅ Adjust the humidity threshold in the code to your needs.
- Duration: 3 Days
- Total Lectures: 15
- Capacity: Max 50
- Difficulty Level: Advanced
- Medium of Instruction: English
Project Cost
₹1,500 ₹3,000
