Rev57LP v2 50% Low-profile Hotswap Ergo Keyboard Kit
Low-profile 57-key ergonomic keyboard inspired by the Reviung41. Uses hotswap sockets for Kailh Choc V1 (PG1350) switches.
Based on reviung-ish by oddkeeb, but almost completely redesigned by 42. Keebs.
QMK and ZMK firmware can be downloaded from our Firmware page.
Features:
- 57-key ergonomic unibody layout similar to the Reviung41
- Extra key in the middle, 2x 1u “space keys” in the bottom row
- Uses Kailh Choc hotswap sockets for Kailh Choc V1 low-profile switches
- Native support for wireless operation (using a nice!nano) with on-board power switch and battery pads
- New in v2: RGB underglow using 9x WS2812B / SK6812 (5050) RGB modules
- Includes acrylic sandwich case for a compact feel and streamlined looks – just 8.8 mm thick (switch plate to bottom plate)
Kit includes:
- Main PCBs
- 2 mm acrylic switch plate (clear or smoky grey)
- 3 mm acrylic mid plate (clear, smoky grey, or custom colour)
- 2 mm acrylic bottom plate (clear or smoky grey; custom colours available in 3 mm)
- 57x Kailh Choc V1 hotswap sockets
- 60x SMD diodes
- Through-hole power switch
- SMD reset switch
- 8x brass standoffs, 16x stainless steel screws
- 8x silicone feet
Other parts required but not included in the kit:
- 1x Frood, nice!nano or other Pro Micro-compatible controller
- 57x Kailh Choc V1 switches
- 57x Choc V1 keycaps
Optional upgrades:
- 9x SK6812 (5050) RGB modules
As usual, switches, keycaps and any other parts pictured but not listed in the kit contents above are not included.
Ladislav Benc (verified owner) –
A really nice keeb to use on the go.
But it really could use some improvements, most notaby a cover for the controller.
vincent.audib@gmail.com (verified owner) –
Very pleased in every way ! Glad this odd one exists !
A bit too many thumb keys to my taste, but choc-spacing keeps it as compact as my previous 34key ferris sweep !
Layout nicely improved, the thumb key orientation full north for the 2 outside is well aligned with the thumb in fact.
The choc-spacing mean the full rev57 exactly matches the footprint of a non-choc ferris sweep (34 keys).
It is possible to fit a battery connector instead of soldering directly the cables, although with some work on the top plate and the key cap in the way (chopped slightly a corner, is ok)… and the JST connector to mutilate.
Good to know:
– the top, intermediate & bottom plate mean the keyboard has some weight. I added foam under so it can lay flat on a laptop keyboard and still not move (prefer that to the silicone bumps to stick).
– diodes soldering needs to be clean enough to fit in the choc hole for lighting, had to re-melt a lot of solder once discovered.
– no screw heads under ! Threaded inserts in the bottom plate give a flush bottom !
– controller is still lower than key caps, I might foam it but protection do not feel necessary to me.
– firmware: find someone with the zmk-config repo for rev57, clone, edit with nickcoutsos.github.io/keymap-editor/, github actions build the firmware, download, then drag’n drop into nice nano.
Context:
Programmer, had a ZSA Planck, then built splitkb kyria, then sweep kits. I use my keyboards one at a time for day job and more 8+h/d (numrow nice for gaming).
Service:
Had a postal glitch, first parcel lost but very friendly communication with 42keebs, and problem solved quickly.
I think this is my endgame…