Why Nostr? What is Njump?
2024-01-24 21:33:22

Lukas on Nostr: A couple of shitposts on my timeline about the link protocol used by TI calculators ...

A couple of shitposts on my timeline about the link protocol used by TI calculators reminded me about an oddity of it that I haven't seen elsewhere:

It's a two-wire (red, white, GND) open-drain interface. One might assume, that one wire's clock and the other one is data or that one's RX and the other one is TX. However, it's none of that:

🧵 (1/2)
Author Public Key
npub1lw5fddlavgj8ssg3w4a8v2jy386lxk59myujulkwsadcv5vpdy3swdj4uz