Efficient Digital Binary Calculator using Arduino Uno

This paper represents a three-bit binary calculator which performs three-bit binary logical operations like AND, OR, NAND, NOR, XNOR, XOR, and other operations like binary addition, subtraction, and comparison of two binary numbers. The components used in this device are Arduino Uno, an LCD display, and a numeric keypad. The Arduino is used to program the device, the numeric keypad is used for giving inputs and the LCD display is used to show output. The device will be useful in a laboratory and educational institutions.