BDN9 Rev. 2 PCB - 3x3 9-key Macropad - Rotary Encoder and RGB


Revision 2 of the board that's a tribute to one of the greatest players ever, the BDN9 is a fun little 3x3 macropad that lets you try out a few rotary encoders as well. What can you do with rotary encoders? That's for you to figure out! Use it as up/down, page up/down, volume control, or whatever, get creative. Go win a Super Bowl with it or something.

With Rev. 2, the microcontroller and other components are already soldered on.

Note: PCB is sold separately from the plates/cases. You will either need to purchase the FR4 Plate kit or one of the Acrylic cases to go along with the PCB, so don't forget to select one in the dropdown above to have it added.


  • 3x3 grid of keys
  • Ability to add up 3 rotary encoders on the top row of the board
  • In-switch RGB LEDs and two underglow RGB LEDs
  • STM32F072 microcontroller
  • Mid-mount USB-C port for lower profile build
  • MX/Alps/Choc switch support

PCB Includes

  • Just 1 PCB

    Other parts needed

    Build Guide

    BDN9 Rev. 2 Build Guide

    Case Files

    GitHub - BDN9 Case (Rev. 2 files not ready yet)

    Build Video! Stop-motion style.

    Default Keymapping:

    The default keymapping that the board is pre-programmed with can be found here: Default Keymaps