Hobbyists, electronic enthusiasts, and makers may be excited to learn that Adafruit has announced the arrival of the NeoTrellis RGB driver PCB for 4×4 keypad. This new release is an upgrade from the ...

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 ...