Wiring of a 4x4 Keypad built using Arduino in TinkerCAD. A keyboard matrix circuit is a design used in most electronic musical keyboards and computer keyboards in which the key switches are connected ...

Keypad Input: Use a 4x4 matrix keypad for data entry and menu navigation. LCD Display: View input data, messages, or system status on a 16x2 LCD display. Interactive Interface: Respond to user inputs ...