The Arduino Calculator Using 4x4 Keypad is a functional project kit designed for hobbyists and students interested in embedded systems and human-machine interface applications. This project utilizes an Arduino microcontroller to process user inputs from a 16-button matrix keypad and perform arithmetic operations.

Key features of this project kit include:

• 4x4 matrix keypad for numerical and functional input.
• Integration with Arduino development boards for logic processing.
• Educational platform for learning keypad scanning algorithms and display interfacing.
• Suitable for building custom desktop calculators or input interfaces for larger projects.