In this project, we’ll see how to make a calculator with Arduino. It will be able to perform addition, subtraction, multiplication, and division. To do this, we’ll use a keypad to enter numbers and an LCD screen to display the result.
Now let’s look at the materials needed for the project:
An Arduino Uno board
A 16×2 Liquid Crystal LCD screen
A keypad
A 220-ohm resistor
Jumper wires (around fifteen!)
To perform a calculation, you must first enter a number, then choose from several operations:
Button A: Addition
Button B: Subtraction
Button C: Multiplication
Button D: Division
Button #: To display the result
Button *: To reset the calculation