A 4x4 membrane keypad is a compact and a cost-effective input device that is commonly used in a variety of electronics projects. It consists of 16 buttons arranged in a 4x4 grid and is covered with a ...

In the code written in Arduino IDE is demnostrated the work of a matrix keypad consisted of three rows and four columns. The three row pins and four column pins are attached to Arduino board. Assigned ...

Type a text Media control (playback, volume) Press a sequence of keys (like ALT+SHIFT to change keyboard layout) etc Works on any OS without any drivers. This project heavily relies on interrupt ...