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


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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.


  • 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