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2 layers211.2 × 113 mmLower case, the printed circuit board in 3D

PCB, 3MF, and STEP files for the lower case capacative keyboard

Size
211.2 × 113 mm
Copper layers
2
Thickness
1.6 mm
Parts
37
Nets
15
Pads
218
Tracks, vias
874, 0
Pours
2
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
19 Aug 2022
Updated
28 May 2025

Overview

Lower case is an open-source printed circuit board by ImYourHuckleberry, from the ImYourHuckleberry/lower_case repository on GitHub, published under the CC0-1.0 licence. It is a 2-layer board of 211.2 × 113 mm with 37 parts on 15 nets, routed with 874 tracks and 0 vias.

Its parts include 34 switches and 1 connector.

README

README.md

lower_case

uhoh

You've probably gotten here by mistake

See this is a 32 key buckling spring keyboard inspired by the IBM Model F. In order to have actually wanted to arrive on this page you need to be:

  1. Interested in mechanichal keyboards
  2. Interested in vintage keyboards
  3. Interested in tiny keyboards
  4. Absurdly tiny keyboards
  5. Willing to order a spec pcb by someone with no education or right making such a thing
  6. Able to get your hands on the necessarry flippers, springs, controllers, barrels, and drivers needed to actually make any of this work
  7. Pretty cool

WARNING

You better use a solenoid in this, if you don't I'll know and I'll find you and take your board away and start discord trash talk. If I ever find out someone tries to make this linear I am taking my proverbial ball offline and going home.

Renders

Sique Classy

Actual Picture

This is real life badged up

#some notes PCB, 3MF, and STEP files for the lower case capacative keyboard

right now I dont even know if this will work!

If you are just looking to make the pcb you need these. The ground plate is necessarry, dont skip it. I went with 0.8 for thickness

lowercase/gerber_pcb.zip lowercase/gnd_gerber.zip

3D parts should be in there. I have printed them and they look good and fit well. I am using threaded insert embedded nuts to screw on the mounting bracket. Basically a little threaded pipe you heat up with a soldering iron and it embeds into the print. This way you have something to actually screw into.

The plate could use some spacebar stab mounts, Im looking into it

Basically you need the case cause of course you do. The plate is curved so IDK how else you could get one. The mounting bracket snugs the whole thing up.

How do all the components fit

Good question!!

Parts

37
QtyValueFootprintReferences
32SW_Capmodel_d:capswitch2SW1, SW3, SW11, SW12, SW13, SW15, SW17, SW19, SW21, SW23, SW25, SW26, SW27, SW29, SW31, SW33 +16
2LOGOLOGOG***, G***
2SW_Capmodel_d:testpadSW50, SW51
1Conn_01x30footprints:Model_F_3.96mm_pitch_footprintJ1

Questions

How big is the Lower case PCB?

It measures 211.2 × 113 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Lower case use?

37 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Lower case KiCad files?

From the ImYourHuckleberry/lower_case repository on GitHub, at the commit this page was made from: the board is lowercase/lower_case/lowercase.kicad_pcb and its schematic lowercase/lower_case/lowercase.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Lower case design in my own project?

Its repository publishes it under the CC0-1.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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