The mnhTTn is a low-profile column-staggered split keyboard using Cherry MX ULP switches. Designed by Dustin Frisch aka fooker to be as flat and lightweight as possible.
The overall height from bottom to top of the keycaps is only 7.9mm.
To archive minimal height, you can order the PCB as low as 0.6mm thick. But this requires additional attention while soldering on the swithches to prevent the board from warping caused by thermal expansion – fooker.
Specs
36 keys (5x3+3 per half)
Cherry ULP switches
Seeed XIAO BLE controller
custom keycaps
The author designed his own keycaps for the ULP switches, manufactured using MJF in nylon. The models are available in the repo, however, as I was told, Dustin is not entirely happy with them: he wants more dish.
The totally overengineered case for the mnhttn hasn't been published yet. It has a magnetic lid which pops open when pulling the leash:
Co-designer Stephen Cheng reviews the main design and ergonomics decisions of the eight year journey to bring Glove80 split contoured ergonomic keyboard to mass manufacturing.