Bottle Cap Keyboard

cults3d

This is a design concept for the "Bottle Cap Keyboard", a compact version of The President's Key. Although initially created to fit an Arduino Pro Micro case, it functions as a standalone single-keyboard that can also be used as a hotkey. Grab any standard PCO1881 bottle cap from your favorite soft drink - most bottles conform to this specification. I've programmed the keyboard with the command keys Cmd+Q for Mac and Alt+F4 for PC to quit applications, but you can easily modify it to suit your needs by changing these key commands. All design files are licensed under Creative Commons - Attribution - Share-Alike. The firmware for the Arduino is released under the more permissive MIT license.