simple calculator using an Arduino, a 4x4 keypad, and a 16x2 LCD display. The calculator allows users to perform basic arithmetic operations such as addition, subtraction, multiplication, and division.
Components Used
Arduino Uno
4x4 membrane keypad
16x2 LCD display with I2C interface
Breadboard and jumper wires
lightbulb
Functionality
Addition +
Subtraction -
Multiplication *
Division /
Clearing the input C
Calculating the result =
usage
Press keys on the keypad to input numbers and operators.
Press '=' to calculate the result.
Press 'C' to clear the input and start over.
Notes
The calculator supports integer input up to three digits.
Division by zero is handled, and an error message is displayed in such cases.
The result is displayed with one decimal point precision.
Technology used
Tinkercad, Arduino, c
