[Nick Bild] has one, and he’s brought it into the 21st century with a USB interface. The interfacing is courtesy of a Teensy microcontroller board as in so many other keyboard projects ...

A useful add-on for any computer is a plug-in macro keyboard ... [Sayantan Pal] has made one, a handy board with nine programmable keys and a USB connector, but the surprise is that at its ...