2 layers243.2 × 106 mm
2 layers356.8 × 105 mm
Undeadsplit
chrisduerr/undeadsplit1Split Keyboard Adventures
- Size
- 356.8 × 105 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 181
- Nets
- 154
- Pads
- 847
- Tracks, vias
- 1,511, 265
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 12 Oct 2023
- Updated
- 27 Apr 2025
Overview
Undeadsplit is an open-source printed circuit board by chrisduerr, from the chrisduerr/undeadsplit repository on GitHub. It is a 2-layer board of 356.8 × 105 mm with 181 parts on 154 nets, routed with 1,511 tracks and 265 vias.
It is built around the ATMEGA32U4-AU. Its parts include 60 diodes, 60 switches, 16 capacitors, 12 resistors and 4 connectors. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdUndead Split Keyboard (v3)
Undead Split v3 is the third revision of my selfmade split mechanical keyboard.
Parts
181| Qty | Value | Footprint | References |
|---|---|---|---|
| 60 | 1N4148 | footprints:diode | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +44 |
| 60 | SW_Push | footprints:CherryMX_Hotswap | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +44 |
| 8 | 0.1µ | footprints:capacitor | C4, C5, C6, C7, C12, C13, C14, C15 |
| 8 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4, H5, H6, H7, H8 |
| 7 | ToolingHole | footprints:tooling_hole | H9, H10, H11, H12, H13, H14, H15 |
| 6 | ~ | footprints:mouse_bites | MB1, MB2, MB3, MB4, MB5, MB6 |
| 4 | 10k | footprints:resistor | R1, R2, R7, R8 |
| 4 | 22 | footprints:resistor | R3, R4, R11, R12 |
| 4 | 22p | footprints:capacitor | C2, C3, C10, C11 |
| 4 | 5.1k | footprints:resistor | R5, R6, R9, R10 |
| 4 | USB_C_Receptacle_USB2.0 | footprints:USB_C_Receptacle_ShouHan_16P_TopMnt_Horizontal | J1, J2, J3, J4 |
| 2 | 10µ | footprints:capacitor | C8, C16 |
| 2 | 1µ | footprints:capacitor | C1, C9 |
| 2 | ATmega32U4-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1, U2 |
| 2 | ~ | footprints:joycon_joystick | JOY1, JOY2 |
| 2 | ~ | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1, Y2 |
| 2 | ~ | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP1, JP2 |
Questions
How big is the Undeadsplit PCB?
It measures 356.8 × 105 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Undeadsplit use?
181 parts, built around the ATMEGA32U4-AU. 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 Undeadsplit KiCad files?
From the chrisduerr/undeadsplit repository on GitHub, at the commit this page was made from: the board is pcb/undead_split.kicad_pcb and its schematic pcb/undead_split.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Undeadsplit design in my own project?
Its repository states no licence, so its author keeps all rights: ask chrisduerr before reusing the design.
Similar boards
- 2 layers228.4 × 85 mm
LeChiffre
tominabox1/Le-Chiffre-Keyboard
Great thanks goes to Jake at P3D for really making the case amazing and open sourcing his work. Check him out at P3Dstore.com
105 parts183GPL-3.0 - 2 layers228.6 × 76.8 mm
Schwann Rev0.5b
The-Royal/The_Royal_Open-Source-Projects
A Master Repository For All things Royal Made
127 parts159MIT - 2 layers30 × 65 mm
Keyboard mcu
dpapavas/lagrange-keyboard
A configurable, handwired, ergonomic keyboard
26 parts137AGPL-3.0 - 2 layers88.4 × 80 mm
LHS Controller PCB
dmcke5/ZenDeck
This is the second revision of my Mini PC based handheld Gaming PC! It is designed for a Beelink SER 5 Mini PC but could be adapted to other systems by changing the mounting brackets and outlet plate.
76 parts133CERN-OHL-S-2.0 - 2 layers259.5 × 89.1 mm
- 2 layers99.1 × 99.1 mm
Power supply panelized
thebiguno/microcontroller-projects
A home for a bunch of microcontroller projects which don't warrant their own repos.
223 parts75 - 2 layers323.9 × 95.1 mm
UnSplit
swiftrax/UnSplit
Ergo 40% mechanical keyboard with all components on the top with diodes arranged in an array
110 parts68GPL-2.0