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In this post, I tried to make an Arduino Calculator very easily using Arduino Uno R3. The values can be sent in through a keypad (44 keypad) and the result can be viewed on an LCD screen. This calculator could perform simple operations like Addition, Subtraction, Multiplication, and Division with whole numbers. But once you understand the concept you can implement even scientific functions with Arduinos built-in functions.

Arduino Uno R3
Numpad attachment
LCD Display
Jumper Wires
Power Supply”

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