Keyboard Builders' Digest
Check out Keebz N Cables in Perth, Australia!
Keyboard Builders' Digest / Projects

Model D

Recreating the Model F look and feel: the Model D is a 40% Buckling springs keyboard built by u/crahamson.

KBD.news
Published June 1, 2022
Creators! Feel free to tip me off about your keyboard related projects to bring them to 100K readers.

No, this is not an obscure IBM model from the '80s. Model D is an amazing contemporary project shared by crahamson aka durken: a 40% ortho capacitive PCB for switches salvaged from a Model F.

It's called Model D and uses buckling spring switches from an old IBM Model F, a custom capacitive PCB and an XWhatsit capsense controller running QMK. The solenoid is enabled with an SKCL lock switch under the IBM badge. The case is 3D printed, sanded and painted – crahamson.

The author designed the PCB based on measurements of a Model F XT (e.g. the size of the capacitive pads).

The project uses the TH-XWhatsit controller:

I put the XWhatsit controller together, flashed it with QMK supporting the controller and hooked everything up. I was a bit surprised to see it worked almost immediately.

Pic:

The next step was to design the case. Crahamson wanted it to look like an actual IBM board so he tried to make a 40 % version of a Model F case. He also decided to make the PCB curved like the original which required several iterations of redrawing the case.

The final design (above) has a separate barrelplate that the PCB slides into. This plate in turn slides into the lower part of the case:

If you think adding a solenoid is trivial, check out this implementation: it can be toggled by pressing a stealth button hidden beneath the IBM badge ("I had an SKCL lock switch from an old Apple keyboard that I decided to use").

There's a fairly detailed post on Deskthority and a GitHub repo with the KiCad files.

Do you like this post? Share, donate, subscribe, tip me off!

Published on Wed 1st Jun 2022. Featured in KBD #81 (source).


Related

Dolothy

A 3D printed Dolch Planck keyboard by sohke with PCB and STLs: Dolothy.

babbit36

Sporewoh's babbit36 is an ultraportable wireless ortholinear keyboard.

Synx42

A clean ultra-low profile ortho split design by @ak1_foo – with Kailh X-switches and only 7.3mm overall height.

A Commodore inspired Planck 64

A Commodore inspired Planck 64 with resin keycaps by 23_Andreas.

Year of the Ortho: sporewoh's 2022

Christian Lo (a.k.a. sporewoh), a rabid ortholinear fan, outlines his experimental projects and provides a behind the scenes look of his highlights of the year.

Low-profile 5x12 ortho

A low-profile 5x12 ortho for travelling by TecHno-Guy.

×
top