I did up a wee variation of the TT busboard…
It’s a compact powered i2c busboard suitable for use with Teletype, Trilogy and other i2c modules. Same voltage regulator and 2.2K pull-up resistors as the Teletype Busboard.
This one is meant to just float freely in the back of your rack (or stuck down with velcro maybe) - rather than directly attached to a module.
(I’ve also got a 1U tile version in the works - I’ll update here when that’s ready)
There’s three 2x3 headers so you could connect up to 6 modules with regular (1x3) i2c jumpers or use a “flying bus” cable to connect multiple modules in series.
I’m hoping this is useful for folks with only non-powered i2c modules (Ansible, Trilogy, JF, etc.)
I have a few built ones and pcbs for sale right now (pm for a link) or you can make your own (Github).
See also: A user's guide to i2c