2 layers40 × 79.6 mm
ESP32 Transmitter and Receiver
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
48 parts915
2 layers181 × 146.5 mm
Split Keyboard
noahmulkis/KillerKeysA Split Keyboard that with an insertion piece turns into a music production powerhouse. Is also super portable
- Size
- 181 × 146.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 48
- Nets
- 62
- Pads
- 1,910
- Tracks, vias
- 315, 8
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 20 Jan 2026
- Updated
- 7 Feb 2026
Overview
Split Keyboard is an open-source printed circuit board by noahmulkis, from the noahmulkis/KillerKeys repository on GitHub. It is a 2-layer board of 181 × 146.5 mm with 48 parts on 62 nets, routed with 315 tracks and 8 vias.
Its parts include 38 switches and 1 IC. It belongs with the keyboards and input boards and the nRF52 and nRF5x boards of this library.
README
README.mdKillerKeys
This is KillerKeys, A super low profile, 3dprintable, pcb based custom keyboard, using a nice!nano knockoff mc.
Required Parts
(Check BOM for exact details)
- microcontroller
- 2x pcb (pcb is reversible)
- 1 of each required 3d printed part
- 6x m3x8 cap head machine screws
- switch of choice (footprints can accomadate multiple brands, I am using reddragon low profile switches)
- 3D printed keycaps (up to personal choice of colour / design)
- Diodes (throughhole or smd)
Assembly instructions
- Solder diodes to board top.
- Solder headers and microcontroller to top of board.
- For RHS board solder together pads to reverse direction, on LHS board solder "normal" side pads together.
- The microcontroller headers are needed to allow the USB-C port to be accessable.
- Push switches through top plates.
- Place top plate in place, filp board upside down, and solder the switches in place.
- Solder Battery onto board, and place in hole in PCB.
- Screw bottom case in place.
- Flash KMK firmware.
Images
Parts
48| Qty | Value | Footprint | References |
|---|---|---|---|
| 38 | ~ | Keyboard_CS:SW_UNIVERSAL_1.00u | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +22 |
| 6 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H2, H4, H8, H10, H10, H12 |
| 1 | Battery_Cell | Keyboard_CS:503020 battery hole | BT1 |
| 1 | SuperMini nRF52840 | Keyboard_CS:ProMicro_DUAL_jumper | U1 |
The 46 most common of 48 parts.
Questions
How big is the Split Keyboard PCB?
It measures 181 × 146.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Split Keyboard use?
48 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 Split Keyboard KiCad files?
From the noahmulkis/KillerKeys repository on GitHub, at the commit this page was made from: the board is Github/PCB/Split Keyboard.kicad_pcb and its schematic Github/PCB/Split Keyboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Split Keyboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask noahmulkis before reusing the design.
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