A 3x3 macropad with RGB underglow. Note: It sets an output pin to high, which is the alimentation of the backlight circuit.
Enter the bootloader in 3 ways:
QK_BOOT
if it is availableMake example for this keyboard (after setting up your build environment):
make machkeyboards/mach3:default
See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.