Proteus is a popular electronics simulation software that allows you to design, simulate, and test electronic circuits. It's widely used by students, engineers, and hobbyists.

A 4x4 keypad is a type of input device that consists of a 4x4 matrix of buttons, typically used to input numeric values, characters, or commands.

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Proteus is a popular electronics simulation software that allows you to design, simulate, and test electronic circuits. It's widely used by students, engineers, and hobbyists.

A 4x4 keypad is a type of input device that consists of a 4x4 matrix of buttons, typically used to input numeric values, characters, or commands.