RGB LED Control via Arduino and Serial Monitor
The main goal of this project was to create a simple and interactive system for controlling an RGB LED.
Users can experiment with different color combinations by entering intensity values ranging from 0 to 255 for each channel.
In doing so, the project demonstrates the principles of serial communication and PWM (Pulse Width Modulation), two core concepts in Arduino programming that enable smooth analog-style control from digital signals.
Components Used
The system is built with basic electronic components:
• Elegoo UNO R3
• RGB LED
• Resistors (220–330 Ω), one per color channel
• Connecting wires
• PC with Arduino IDE and Serial Monitor
Functionality
When powered, the Arduino initializes serial communication and displays a welcome message. Users can then enter three numeric values corresponding to the red, green, and blue channels.
The program validates these inputs and applies them to the LED through analogWrite(), instantly updating its color.
This simple setup offers a clear way to explore color blending and signal control in real time.
Possible Extensions
Potential improvements include a graphical user interface for intuitive color selection, multi-LED synchronization for lighting patterns, and the option to store custom color presets for quick access.
Key Learnings
• Strengthened understanding of hardware–software interaction in embedded systems.
• Refined structured coding and user-centered design skills for functional, intuitive solutions.