claculator

A simple 4-function calculator implemented using ATmega32 microcontroller, a 4x4 keypad for user input, and a 16x2 LCD for displaying results.

Features:

Supports basic operations: Addition (+), Subtraction (-), Multiplication (*), Division (/)

Takes user input via matrix keypad

Displays input and result in real time on LCD

Handles multi-digit numbers and simple operator precedence (left to right)

Technologies Used:

ATmega32 Microcontroller (AVR)

4x4 Keypad (Matrix scanning)

16x2 LCD (HD44780)

C Language (AVR-GCC)

Proteus for simulation

AVR Studio / Microchip Studio for development

Key Skills:

Keypad interfacing and scanning

LCD display control (custom functions and strings)

Arithmetic expression evaluation

Embedded C and modular code structure