2 layers162.2 × 126.5 mm
2 layers245.5 × 94.5 mm
Split
TMRZ-1/34spliT734spliT split keyboard pcb, case and software files
- Size
- 245.5 × 94.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 86
- Nets
- 95
- Pads
- 726
- Tracks, vias
- 659, 4
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Jun 2026
- Updated
- 25 Jun 2026
Overview
Split is an open-source printed circuit board by TMRZ-1, from the TMRZ-1/34spliT repository on GitHub, published under the MIT licence. It is a 2-layer board of 245.5 × 94.5 mm with 86 parts on 95 nets, routed with 659 tracks and 4 vias.
Its parts include 38 switches, 34 diodes, 2 ICs and 2 connectors. It belongs with the keyboards and input boards and the RP2040 and AVR (ATmega, ATtiny) boards of this library.
README
README.md34spliT
34spliT is my new keyboard, it's simple and not perfect but I wanted my own split keyboard.
Bottom row can be 1.25u and 1.25u or 1u and 1.5u
Case have small angle on the bottom
BOM for pcb
- 2x pro micro rp2040 controller
- 34x 1n4148 or 1n4148w diodes (square hole is the side for black part or part with line)
- 2x MJTP1243 button for reset
- 2x MJ-4PP-9 for trrs
- TRRS cable
Optional:
- 36x hotswap sockets, pcb have both, solder and hotswap
- MSK12C02 - added for wireless build but NOT TESTED
BOM for case
- 10x m2 4x3.2 inserts - for plate top mount
- 10x m2 5mm screws - for plate top mount
- 16x 3x3 cylinder magnets, I used n42 - for connecting top case with bottom case
Overall build tips
- Pay attention to the side where you're inserting the magnets; they should snap into place, and the top and bottom magnets should attract each other.
- First, screw the plate to the top case, then insert the switches. Unfortunately, I rushed it, and the screw holes at the bottom for the plate are covered by the PCB.
- The hole in the top case through which you can see the USB-C port could be a little higher; fortunately, it's easy to cut off the bottom part of the case and enlarge the hole.
Parts
86| Qty | Value | Footprint | References |
|---|---|---|---|
| 34 | Diode | keyboard Keebio-Parts:Diode-dual | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +18 |
| 32 | Keyswitch | keyboard ScottoKeebs_hotswap:Hotswap_MX_1.00u | S1, S2, S10, S11, S12, S13, S14, S15, S18, S19, S20, S21, S22, S23, S24, S25 +16 |
| 4 | Keyswitch | keyboard ScottoKeebs_hotswap:Hotswap_MX_1.25u | S16, S17, S33, S34 |
| 4 | MountingHole_Pad | keyboard Keebio-Parts:SinglePad | Bat+1, Bat+r1, BatGND1, BatGND4 |
| 2 | 5.5mm | keyboard marbastlib-various:mousebites_5p5mm_easysnap | MB5, MB5 |
| 2 | AudioJack4dpb | keyboard kbd:MJ-4PP-9 | J1, J2 |
| 2 | Keyswitch | keyboard ScottoKeebs_hotswap:Hotswap_MX_1.50u | S36, S37 |
| 2 | RP2040_Pro_Micro | keyboard ScottoKeebs_mcu:RP2040_Pro_Micro_Flipped | U1, U2 |
| 2 | SW_Push | keyboard ScottoKeebs_components:Button_MJTP1243 | RSW1, RSW2 |
| 2 | SW_SPDT | keyboard ScottoKeebs_components:Switch_MSK12C02 | SW_POWER1, SW_POWERR1 |
Questions
How big is the Split PCB?
It measures 245.5 × 94.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Split use?
86 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 KiCad files?
From the TMRZ-1/34spliT repository on GitHub, at the commit this page was made from: the board is PCB/Split.kicad_pcb and its schematic PCB/Split.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Split design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
Similar boards
- 2 layers75 × 40 mm
Pulse shaping extension v1.1
MKesenheimer/fault-injection-library
Python library to perform fault-injection attacks on microcontrollers
86 parts218GPL-3.0 - 2 layers52 × 90 mm
- 2 layers66 × 54 mm
- 2 layers55.8 × 66.5 mm
Tadpoleswadge
cnlohr/cnhardware
My dumping grounds for all my kicad projects and random hardware bringup.
86 parts114 - 2 layers58 × 109 mm
Minion
AudioMorphology/Europi
Opensource sequencer software for Raspberry Pi equipped with Eurorack-compatible hardware
86 parts103 - 2 layers266 × 89.6 mm
- 2 layers149.9 × 99.9 mm
