Inside the case is an Arduino and breadboard with three through-hole momentary buttons. These are wired up to the Arduino inputs and a sketch emulates keystrokes when connected to a computer.

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To make that actually work, Robofun paired an Arduino board with some capacitive controllers for the base, and connected that to a Raspberry Pi that linked the keyboard to the TV.

The Bolt Industries Pico 87 is a fully customizable and programmable DIY mechanical keyboard kit that can be coded using the Arduino IDE.

DIY-er Penk Chen creates his own version of an ultra-portable handheld PC with a mechanical keyboard. Take a quick look at Penkesu.

But that’s not stopping DIY-er Penk Chen from building their own handheld PC called the Penkesu — a retro-futuristic ultraportable laptop with a mechanical keyboard.