Out of my own interest, and for a university course in creative exploration, I made my own keyboard. An iterative design process was used to find a layout, which was worked out into a 2D CAD design file. The parts were lasercut and the electronics were soldered.

Design

An iterative process resulted in a design ready for prototyping:

With the help of online tools and a 2d CAD program I sent it off to be lasercut:

Construction

The parts were fitted and soldered:

Firmware

There are many firmware solutions available, so I merely had to modify one to my preferences and upload it to the keyboard.