This week's HN-find-of-the-week™ comes from Spencer Nelson. Topic: Keyboard protocols. And no, it's not about PS/2 or USB, far from it.

Spencer took apart the keyboard of a NeXT machine, and found himself trying to understand the protocol, buying an Arduino, an oscilloscope, and a logic analyzer. 💸

It is interesting to note, that NeXT has actually gone its own way with the protocol here. And why 455 kHz in particular plays a role in this, can be read in detail in Spencer's article on the subject.

Exciting and entertaining.