Quantity   Component name
1 × Arduino Leonardo Using the Arduino USB HID libraries to make the keyboard saved us a lot of trouble!
1 × PCB milled at the FabLab The University was kind enough to let us mill some PCBs for the prototypes. It's just some buttons, resistors and a pin header
1 × Lasercut MDF fronts Having a prototype that looks somewhat good but still hacky "techno-rustique" really made an impression on the testing group.