Here we will discuss the Introduction to 4x4 Matrix Keypad Module, pin diagram, Working Principle, Features, and applications.
Rubber-domes beneath each button provide satisfying key travel with each button press. Each key is emblazoned with a legible white character molded into its surface. Four mounting holes allow solid and easy mounting to a panel. The single-row 0.1-inch-pitch solder pads are breadboard friendly.
Punch in your secret key (or Jenny's number) into this numeric matrix keypad. These keypads give you a way to easily add numeric buttons to your project. They're easy to use, with tons of options including CircutiPython, Python and Arduino.