4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers91 × 55 mm
Switch42
zk-phi/ddm9A meishi-sized keypad with 9 keys
- Size
- 91 × 55 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 31
- Pads
- 109
- Tracks, vias
- 107, 5
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 19 Jul 2020
- Updated
- 2 Jul 2025
Overview
Switch42 is an open-source printed circuit board by zk-phi, from the zk-phi/ddm9 repository on GitHub. It is a 2-layer board of 91 × 55 mm with 25 parts on 31 nets, routed with 107 tracks and 5 vias.
It is built around the SK6812MINI-E. Its parts include 9 switches, 9 inductors and 1 IC. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
1Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | SK6812MINI | phi-kbd-library:SK6812MINI-irreversible | L1, L2, L3, L4, L5, L6, L7, L8, L9 |
| 9 | SW_PUSH | phi-kbd-library:Choc_1.00u-narrow-irreversible | SW1, SW2, SW3, SW4, SW5, SW6, SW8, SW9, SW10 |
| 4 | Val** | phi-kbd-library:M2_SCREW_HOLE_Plated | Ref**, Ref**, Ref**, Ref** |
| 1 | LOGO | paripi:Untitled5 | G*** |
| 1 | LOGO | paripi:Untitled6 | G*** |
| 1 | ProMicro | phi-kbd-library:ProMicro_Reversed_Conthrough-irreversible | U1 |
Questions
How big is the Switch42 PCB?
It measures 91 × 55 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Switch42 use?
25 parts, built around the SK6812MINI-E. 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 Switch42 KiCad files?
From the zk-phi/ddm9 repository on GitHub, at the commit this page was made from: the board is pcb/switch42.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Switch42 design in my own project?
Its repository states no licence, so its author keeps all rights: ask zk-phi before reusing the design.
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