BMEK is an ergonomic keyboard in the spirit of Lyn's EM7 and TGR Alice. Notable differences are the HHKB-like layout and the and the more symmetric looks due to the space bars and left key cluster arrangement.
Before you jump in and start making your own case, consider checking out the Progress Thread, and join the Discord Server. There will also be a small group-buy for aluminum cases, plates and PCBs (Interest Check). In the course of this group buy there will also be some changes made to the design that have not (all) been pushed to this repository yet, so you might want to wait for these to land before building your own.
The main key layout (besides the extra 4 key-cluster on the left) is almost exactly the Layout of the HHKB. The only changes are in the bottom row:
- The 1.5u modifiers are replaced by 1.25u modifiers
- The single spacebar is replaced by two smaller ones
These versions of the PCB only support the fixed layout as described above. Note that you'll need 2x2.75 spacebars. Most GMK (spacebar) kits only come with one, but you can always use a 2.75u or 2.25 shift key or spacebar and live with a little gap :)
The upcomming V3 of the PCB will support a 2u backspace option, as well as 2.25u/2.75u layout options for the spacebars (the new version of the case comes with a "blocker" to fill in the gap that is created when using the 2.25u spacebar) and an option to use full or split rshift.
Setup QMK and run make bemeier/bmek:default
Alternatively you can download and flash the precompiled firmware from the Releases section. Firmware Source: TODO: Release, Dev
With this version, both hot-swap sockets and permanent soldering are supported. Connector is USB-C, and is confirmed to also work with USB-C to USB-C cables.
The PCB design was based on the schematics from the Goldfish controller.
All Gerber & BOM files needed for ordering at JLCPCB are under pcb. It can be ordered with pick-and-place assembly. Only top-mounted LEDs (optional), hot-swap sockets (optional) and USB-C connector need to be ordered separately and soldered by hand.
PCB v2.1 adds some changes to fit the new plate-based design. Namely cutouts to access the scews that mount the plate to the top-case. Note that these are not strictly required to build the new case, but it is a bit more convenient (in case you want to swap out your plate+switch+pcb assembly without desoldering everything).
Version 3 of the PCB comes in either hotswap or solder version, not in a combined version. It includes the extra cutouts for the plate screws from v2.1. It further comes with these changes compared to v2.x:
- Layout option backspace: 2u Backspace and 2x 1u hhkb-like
- Layout options bottom row: Each of the 2.75u spacebarss can be replaced with a 2.25u spacebar for better keyset compatibility.
- ESD protection circuity
- Switched to the popular, cheaper and easier to hand-solder HRO-TYPE-C-31-M-12 USB-C receptacle
- Made completely from scratch in KiCad (project will be released as soon as design is verified)
3D models for a 2-piece high profile case with integrated plate mounts (intended for CNC-machining from polycarbonate or aluminium) are under cases/old_integrated_plate_case.
A top-mounted version of the original case is being designed under cases/top_mount. This is the case I would recommend building - especially if you want to 3D print parts, I'd suggest to print top and bottom case, but get the plate cut/machined from metal (as this is the part where the tolerances are most important.
Not made yet, will put files here: (cases/lasercut).
Obviously you will be building the PCB or case at your own risk, but feel free to reach out if you need help or want to contribute. Check out the geekhack thread, Discord Server, or use the issue system on this repository.
BMEK Mechanical Keyboard by Jan Kolkmeier is licensed under a Creative Commons Attribution 4.0 International License.
I decided to modify the case provided by Bemeier to make it a seamless design. The case is 4mm wider and 4mm longer, the height remains the same, and it uses the standard plate and internal weight. The chamfers on the outer edge were also changed to fillets. I also included a wrist rest to match the design, it matches the angle and the height. Be warned, the wrist rest design does not account for any sort of rubber feet. Use this design at your own risk, It has not been manufactured to test for any flaws in the design.
