Arduino Serial Monitor: Circle Area Display

This project is a beginner-friendly Arduino sketch designed to demonstrate how the Serial Monitor works in real-time. It calculates and displays the area of a circle using a simple mathematical formula, with the radius increasing on each loop.

📖 What This Project Does

Every second, the program:

• Calculates the area of a circle using the formula Area = π × r²
• Increases the radius by 1 unit
• Prints a message to the Serial Monitor that includes both the radius and its corresponding area

This continues infinitely, providing a growing list of circle areas as the radius grows. It's a great way to get familiar with:

• Using the Serial Monitor for output
• Performing arithmetic with floating point numbers
• Declaring and manipulating different data types (float, int, String)

🖥️ Sample Output

Below is an example of what you would see in the Arduino Serial Monitor:

A circle of radius 2 Has an area of 12.56
A circle of radius 3 Has an area of 28.26
A circle of radius 4 Has an area of 50.24
A circle of radius 5 Has an area of 78.5
A circle of radius 6 Has an area of 113.04
...

The output continues as long as the Arduino board is running.

💡 Possible Improvements

Here are a few ideas to take this project further:

• Limit the radius growth and reset it after a certain value to avoid overflow.
• Use the PI constant from the math.h library for more precision.
• Display the values on an LCD or OLED screen instead of the Serial Monitor.
• Add user interaction using buttons or a potentiometer to control the radius.
• Store values in EEPROM to log radius-area data even after reset.

🎯 Goal

This simple program was mainly used to practice printing dynamic content to the Serial Monitor and working with basic variables. It serves as a fun and clear way to get started with Arduino coding.

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Feel free to fork this repo and build your own version of it!