In a standard keypad wired as an X-Y switch matrix, normally-open switches ... C1-C3 pinouts of the keypad Next is a project example, where the Arduino is instructed to do something based on a correct ...

Isn’t it time for a full Arduino-compatible keyboard? [ELECTRONOOBS] thinks ... The keypad uses an onboard ATMega328P to scan the matrix for button presses, decode them, and send them via ...

[awende] over at Sparkfun has created a Cherry MX Keyboard which incorporates all of the Autodesk Eagle Shortcuts to a single 4×4 matrix. The project exploits the Arduino Pro Mini’s ability to ...