Arduino 42-Digit SPI Keypad Matrix (video) 1:01 pm April 19, 2017 By Julian Horsey. Arduino enthusiasts or those looking to learn more about programming with Arduino and electronics-in-general may ...

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 ...

This calculator uses a full 16 button matrix keypad. The Arduino deciphers button pushes with the help of the Keypad library, at which time the appropriate character is displayed on the 2×8 LCD ...