# BDN9  A 3x3 macropad with support for up to 3 rotary encoders. * Rev. 1.0-1.2 encoder locations: Top Right, Top Left * Rev. 1.3 encoder locations: Top Right, Top Middle, Top Left * Rev. 2 encoder locations: Top Right, Top Middle, Top Left **Keyboard Maintainer:** [Bakingpy/nooges](https://github.com/nooges) **Hardware Supported:** * Rev. 1: Pro Micro, Elite-C, Proton C * Rev. 2: Integrated STM32F072 microcontroller **Hardware Availability:** * [Keebio - BDN9 Rev. 1](https://keeb.io/products/bdn9-3x3-9-key-macropad-rotary-encoder-support) * [Keebio - BDN9 Rev. 2](https://keeb.io/products/bdn9-rev-2-3x3-9-key-macropad-rotary-encoder-and-rgb) Make examples for this keyboard (after setting up your build environment), select the appropriate line for your PCB revision: make keebio/bdn9/rev1:default make keebio/bdn9/rev2:default See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).