Ben Eater (Author of this Video) is fantastic. Learned so much on electronics and computers through this series https://www.youtube.com/watch?v=HyznrdDSSGM&list=PLowKtXNTBy...
- He investigates the PS/2 keyboard protocol: https://www.youtube.com/watch?v=7aXbh9VUB3U
- Somebody on Patreon asked about USB keyboards having higher latency than PS/2, so he made a video about the basic USB protocol: https://www.youtube.com/watch?v=wdgULBpRoXk
- He made the OP video about USB keyboards being limited to holding six keys at once.
Whatever happened to wire wrap?
* https://en.wikipedia.org/wiki/Wire_wrap
I can understand BBs for quick prototyping and tinkering, but once you've settled on the design, I'd think WW would be less fragile to deal with.