I built this wireless split keyboard!
It required about 4 hours of soldering—it’d probably take a normal person 1-2 but you’ve seen how shaky my hands are LOL
It’s meant to be wireless, but the batteries haven’t arrived yet.
They share power and communicate using a 3.5mm TRRS cable!
Some other cool keyboards:
This is a normal QWERTY keyboard with an orthilinear key layout (not staggered).
This is a Kinesis Advantage2. It’s contoured, ortholinear and split.
This is a Charbydis Nano. It’s contoured ortholinear, and split. It also has a trackball!
Gallery
Got myself a huge and sturdy set of "helping hands"