Matt Finish, Sticker type, Looks great on enclosures.
This 16-button keypad provides a useful human interface component for microcontroller projects. Convenient adhesive backing provides a simple way to mount the keypad in a variety of applications. The Keypad 4x4 features a total of 16 buttons in Matrix form. This is a membrane keypad with no moving parts. It has a nice overlay depicating a telephone type keypad with additional four functional buttons. A female 8-pin berg connector is provided for interfacing it with your mirocontroller circuits.
How it Works
Matrix keypads use a combination of four rows and four columns to provide button states to the host device, typically a microcontroller. Underneath each key is a pushbutton, with one end connected to one row, and the other end connected to one column. These connections are shown below.