A keypad is one of the most commonly used input devices in microprocessor applications. In a standard keypad wired as an X-Y switch matrix, normally-open switches connect a row to a column when ...

[Max Breedon] found an old Apple IIe clone twenty years ago. He recently dug this Epson AP-200 out of the salvage heap and quickly discovered that the keyboard decoder chip was fried. The old chip was ...

Adam Podstawczynski has created an innovative Arduino-powered project that emulates a Commodore 64 keyboard on a modern PC. This project allows keystrokes to be translated into character inputs on a ...