# molecule [](https://i.imgur.com/uYCeS4Yh.jpg) A 40 keys keyboard with trackball. * Keyboard Maintainer: [bbrfkr](https://github.com/bbrfkr) [@bbrfkr](https://twitter.com/bbrfkr) * Hardware Supported: molecule PCB, Pro Micro * Hardware Availability: https://bbrfkr.booth.pm/ Make example for this keyboard (after setting up your build environment): make molecule:default Flashing example for this keyboard: make molecule:default:flash 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). This keyboard project includes [aball](https://github.com/brickbots/aball) project source code partially.