2 layers299 × 82.5 mm
PixelWave
hackclub/OnBoard
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663 parts915
2 layers265.9 × 99.6 mm
DichotomySplit
Cocotrilito/The-Dichotomy-SplitAn Split keyboard, created to understand new things like matrix and wireless things, and also from the feeling of being split, Im trying to become someone new but im still stuck in this hole, A tool for the transition... a bridge out of the hole.
- Size
- 265.9 × 99.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 151
- Nets
- 125
- Pads
- 636
- Tracks, vias
- 1,024, 30
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 26 Apr 2026
- Updated
- 4 Aug 2026
Overview
DichotomySplit is an open-source printed circuit board by Cocotrilito, from the Cocotrilito/The-Dichotomy-Split repository on GitHub. It is a 2-layer board of 265.9 × 99.6 mm with 151 parts on 125 nets, routed with 1,024 tracks and 30 vias.
It is built around the SK6812. Its parts include 84 diodes, 42 switches, 4 resistors and 2 ICs. It belongs with the keyboards and input and lEDs and displays boards and the nRF52 and nRF5x boards of this library.
Main components
1README
README.mdThe -Dichotomy- Split
An Split keyboard, created to understand new things like matrix and wireless things, and also from the feeling of being split, Im trying to become someone new but im still stuck in this hole, A tool for the transition... a bridge out of the hole.
The reason behind this project...
Initially I wanted to prove myself I could go a little more deeper, what I mean Is that I had already made a macropad as my first hackclub project 4 months ago, and the split keyboard was the logical step, when I started with KiCad Fusion and coding. everything was really hard im not saying today it isnt, but compared to how much I struggled 4 months ago, I can proudly say I have learned, and not just a little, but A LOT, and as I am writing this, throught my headphones KUNGFUPANDA theme song is blasting my ears, this is the same song I used to play back and back again 4 months ago, and you see 4 months ago I was lost (im still kinda but not as I was), I was heartbroken, and without an actual purpose, and I saw I video on my feed talking about blueprint, this made me really curious, and I started learning, and now here I am, well I wanted to learn about ZMK in my macropad I only did the QMK firmware but I really wanted to tryout ZMK, and was really cool!, also I wanted to make the projects that I thought were impossible and to the Isaac of 4 months ago... Thanks!, you have really changed your life, and to the future Isaac... How are you doing? was it all worth it?... thanks for reading if you did! <3
zmk repo
layout
Schematic Overview
PCB
 PCB OVERVIEW |  Render |  PCB layout |
 PCB Top |  PCB Back |
CAD Render
BOM
| Name | Purpose | Qty | Total Cost (USD) | Link |
|---|---|---|---|---|
| 1N4148W SOD-123 | Efficiency for pins in matrix, also avoids ghosting | 1 (set) | $1.31 | AliExpress |
| XDA Profile PBT Keycaps | Ergonomics and feel | 1 (set) | $11.83 | AliExpress |
| Outemu Silent Switches | Mechanical input (Tactile/Silent) | 1 (set) | $7.55 | AliExpress |
| LEDs SK6812 MINI-E | Per-key RGB lighting (WS2812B compatible) | 1 (set) | $4.83 | AliExpress |
| PCB Manufacturing | Custom designed PCBs for the split layout | 1 (set) | $14.60 | [JLCPCB] |
| Seeed Studio XIAO nRF52840 | Main microcontrollers with BLE for wireless | 2 | $37.98 | Amazon |
SPECIAL THANKS!
Thanks for reading! made possible with STASIS by HackClubbers
You might also like!
final thanks :3
By cocotrilo made with luv (THIS ONE WAS WITH philosophical meaning) keep the grind <3
Parts
151| Qty | Value | Footprint | References |
|---|---|---|---|
| 42 | D | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +26 |
| 42 | SK6812 | LED_SMD:LED_SK6812MINI-E_3.2x2.8mm_P1.5mm_ReverseMount | D43, D44, D45, D46, D47, D48, D49, D50, D51, D52, D53, D54, D55, D56, D57, D58 +26 |
| 42 | SW_Push | marbastlib-mx:SW_MX_1u | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +26 |
| 10 | MountingHole | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad | H1, H1, H2, H3, H3, H4, H5, H6, H7, H9 |
| 4 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP1, TP2, TP3, TP4 |
| 3 | MountingHole | Panelization.pretty-master:mouse-bite-5mm-slot | H11, H12, H13 |
| 2 | 2M | Resistor_SMD:R_0805_2012Metric | R3, R4 |
| 2 | 806K | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | LOGO | LOGO | G***, G*** |
| 2 | Seeeduino Xiao nRF52840 | marbastlib-xp-promicroish:Xiao_nRF52840_ACH | U3, U4 |
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Questions
How big is the DichotomySplit PCB?
It measures 265.9 × 99.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the DichotomySplit use?
151 parts, built around the SK6812. 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 DichotomySplit KiCad files?
From the Cocotrilito/The-Dichotomy-Split repository on GitHub, at the commit this page was made from: the board is project files/DichotomySplit/DichotomySplit.kicad_pcb and its schematic The Dichotomy Split/The Dichotomy Split.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the DichotomySplit design in my own project?
Its repository states no licence, so its author keeps all rights: ask Cocotrilito before reusing the design.