Arduino Based Calculator Using 4*4 Keypad

Abstract

Numbers and the various operations associated with them were the primary emphasis of this undertaking. The manual system in great detail with the goal of determining whether or not the system should be automated. It is interesting to note that the capability of the straightforward calculator system to process numbers and operators and to provide a result that is helpful was the final outcome. The digital electrical technology underpins both the quantitative and computational processes involved in calculation. The user provides input for the calculator in real time via a keyboard, and the calculator then presents the results on an LCD display screen. Arduino is used to handle the management functions, as well as the mathematical algorithm and computation functions. After configuring the prototype of the system and expressing the simulation results for the fundamental mathematical functions and some scientific functions of the calculator with the assistance of the Proteus simulation software, the constructed calculator circuit is used to validate the experimental findings. A steam-powered machine that performed simple mathematical operations was one of the first calculating machines developed by Charles Babbage, who is widely regarded as the father of computers. Babbage's machine, which was used to calculate tables of numbers, was based on the premise of performing those operations. With the help of an Arduino and a 4x4 keyboard, we are going to construct our very own basic calculator, and the output of the computation will be displayed on a 16x2 dot matrix LCD screen. Addition, subtraction, multiplication, and division are the mathematical operations that will be supported by our calculator.