There are a ton of applications that we use that can benefit from keyboard shortcuts, and we use ’em religiously. Indeed, there are some tasks that we do so often that they warrant their own physical button. And the only thing cooler than custom keyboards are custom keyboards that you’ve made yourself.
Which brings us to [Dan]’s four-button Cherry MX USB keypad. It’s not really all that much more than four keyswitch footprints and an AVR ATmega32u4, but that plus some software is all you really need. He programs the Arduino bootloader into the chip, and then he’s using the Arduino Leonardo keyboard libraries. Bam! Check out the video below.
We see this design much more as a demo or collection of building-blocks than necessarily a one-size-fits-all solution. You might need five buttons, or want a different layout, or… It’s all open-source, so go nuts. And you’re not limited to key-clicks either — mouse buttons or even multiple scripted actions are within easy reach.
Building a special-function USB keypad or gaming device used to be hard work. But today between hardware and software design availability, it’s child’s play. Whether you need a footboard, a single-handed chording keyboard, or even just to update an old typewriter, the ability to control the input device that we use for eight hours per day is liberating. Experiment!