He used an Arduino, and multiplexed RGB LEDs with some digital potentiometers to create a color mixing keypad. Since we couldn’t fit the complete 4×4 keypad into a standard 2 gang wall box ...

connect to the row R1-R4 pinouts of the keypad byte colPins[COLS] = {2, 3, 4}; //connect to the column C1-C3 pinouts of the keypad Next is a project example, where the Arduino is instructed to do ...

If you want to add a keypad to your Arduino project, the options are pretty ... Future plans include an LED to indicate when shift is pressed, and adding the special characters next to the numbers ...

I made this Arduino project that allows to turn ON ... is used to set the initial state of LEDs (in our case OFF) and has number of leds + 1 more zeros, so if you add 2 more leds, then add 2 more ...

To learn more about the JC Pro Macro 2 mechanical keypad kit project watch the promotional video below. “Programming and customization are via the Arduino IDE, and it can theoretically run QMK ...