Bottle Cap Keyboard
Description
This is a design for a "Bottle Cap Keyboard", a miniature version of The President's Key. Although I made this for an Arduino Pro Micro case, it's really a working single-key-board that can be used as a hot-key-board. Grab any favorite PCO1881 standard bottle cap (most soft drink bottles conform). I programed it with Cmd+Q(mac) / Alt+F4(pc) for quit from applications but you can change it to any key command. All design files are licensed as Creative Commons - Attribution - Share-Alike. The firmware for the Arduino is licensed under the more permissive MIT license.
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