2 layers230 × 85 mm
Le chiff ble hotswap
MangoIV/le_chiff_ble
A drop-in replacement-PCB for the beautiful le_chiffre
117 parts52GPL-3.0
2 layers196.1 × 87.8 mm
Unispliff
weteor/Unispliff334 key col stagger keyboard w/ encoder.
- Size
- 196.1 × 87.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 99
- Nets
- 79
- Pads
- 438
- Tracks, vias
- 852, 168
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Aug 2026
- Updated
- 10 Aug 2026
Overview
Unispliff is an open-source printed circuit board by weteor, from the weteor/Unispliff repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 196.1 × 87.8 mm with 99 parts on 79 nets, routed with 852 tracks and 168 vias.
It is built around the DW01A, FS8205 and TP4056, with the AO3401A, ASMD1206-150 and PRTR5V0U2X among its other parts. Its parts include 36 diodes, 36 switches, 10 capacitors, 6 resistors and 5 ICs.
Main components
6
DW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery ManagementFS8205
SOT-23-6-55℃~+150℃ 1.2V 1W 2 N-Channel 20V 37mΩ@2.5V 6A N-Channel SOT-23-6 MOSFETs ROHSFORTUNEMOSFETs
TP4056
ESOP-8-40℃~+85℃ 1 1A 35uA 4.2V 4V~6.5V Charging IC Lithium Battery Support Support 恒流充电、恒压充电、涓流充电、自动再充电、充电终止、可编程充电电流、软启动、欠压锁定 ESOP-8 Battery Management ROHSUMWBattery Management
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
ASMD1206-150
1206-40℃~+85℃ 1.5A 1.9mm 100A 130mΩ 1mm 25mΩ 3.6mm 300ms 3A 6V 800mW 1206 Resettable Fuses ROHSShenzhen JDT FuseResettable Fuses
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
README
README.mdUnispliff
34 key col stagger keyboad w/ encoder
Features
- choc spacing
- Choc V1 and V2 (make sure to get keycaps with MX stems and choc spacing)
- case: top w/ bottom plate (top preferably resin printed, but may work with other techniques)
- Hotswap sockets
- Ebyte-2G4M08S1C controller (ZMK firmware, you have to first flash a bootloader, adafruit bootloader works fine)
- BLE
- Encoder
- gerber and case files are supplied (kicad files, stl as well as freecad files)
- completely open source, permissive license (CERN-OHL-P)
Want one?
All production files you need to build your own board can be found here.
I've had my case printed in resin, nylon or similar should work fine too. FDM might be a bit more challenging because of the stepped top, your milage may vary.
I've provided some files for the encoder wheel, the design without groove can be used as is, the other ones user some silicone gaskets, you my have to look for some that fit. The 1.7 files are with a smaller diameter for the rod that is pressed in the encoder. I would advise to print both variants and see which one fits better.
Apart from the pcb and printed parts you need:
- 34 hotswap sockets
- 34 diodes (1N4148 int SOT-123)
- 34 of your favourite switches
- 1 Controller (Ebyte-2G4M08S1C)
- 1 Push Button SPST_TL3342
- 1 Encoder Alps EC05E1220203
- 1 PRTR5V0U2X (SOT-143)
- 1 100 Ohm resistor (SMD 0603)
- 1 1kOhm resistor (SMD 0603)
- 1 1.5kOhm resistor (SMD 0603)
- 3 5.1kOhm resistors (SMD 0603)
- 2 15pF capacitors (SMD 0603)
- 2 1uF capacitors (SMD 0603)
- 2 10uF capacitors (SMD 0603)
- 1 Schottky Diode (SOD-323)
- 1 Transistor AO3401A
- 1 Fuse ASMD1206-150 (1206) or similar
- 1 LDO XC6206P332 (SOT-23)
- 1 TP4056 (SOP-8)
- 1 DW01A (SOT-23-6)
- 1 FS8205 (SOT-23-6)
- 1 Crystal 32.768kHz (3215 2Pin 3.2x1.5mm)
- 1 USB Connector C-Type, 12 pin/16pin, mid-mount (1.6mm)
firmware
First flash a bootloader onto the controller. I've used the Adafruit nRf32 Bootloader. Firmware for ZMK can be found here. I've build local. If you need a Github workflow you will have to modify it yourself.
the rest
Everything in this repository is free to use however you might see fit. If you want to support me and my projects, please consider linking back to this repository if you build/change/use anything.
If you would like to send me a tip, you could do it here (Please don't feel like you have to).
Parts
99| Qty | Value | Footprint | References |
|---|---|---|---|
| 34 | D_Small | weteor:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +18 |
| 32 | SW_Push_45deg | weteor:ChocV1_V2_Hotswap | SW1, SW2, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW19, SW20, SW21, SW23, SW24, SW25, SW26 +16 |
| 3 | 100n | Capacitor_SMD:C_0603_1608Metric | C4, C5, C6 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 15pF | Capacitor_SMD:C_0603_1608Metric | C7, C8 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C9, C10 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | R6, R7 |
| 2 | SW_Push_45deg | weteor:ChocV1_V2_Hotswap_1.5u | SW18, SW22 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 100R | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 1k5 | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 5k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | ASMD1206-150 | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | Battery_Cell | weteor:battery_pads | BT1 |
| 1 | Crystal_Small | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | DW01A | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | D_Schottky_Small | Diode_SMD:D_SOD-323_HandSoldering | D7 |
| 1 | FS8205 | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | PRTR5V0U2X | Package_TO_SOT_SMD:SOT-143 | D36 |
| 1 | RotaryEncoder | weteor:EC05E1220203 | SW36 |
| 1 | SWD_Ext | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | SW_RESET | Button_Switch_SMD:SW_SPST_TL3342 | SW10 |
| 1 | TP4056 | weteor:TP4056_SOP-8-PP | U2 |
| 1 | USB_C_Receptacle_USB2.0_16P | weteor:USB-C-12-Pin-MidMount | J2 |
| 1 | XC6206PxxxMR | Package_TO_SOT_SMD:SOT-23 | U1 |
| 1 | e73-2gm08s1c-no-underside | mcu:e73-2g4m08s1c-no-underside | U6 |
Questions
How big is the Unispliff PCB?
It measures 196.1 × 87.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Unispliff use?
99 parts, built around the DW01A, FS8205, TP4056 and AO3401A. 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 Unispliff KiCad files?
From the weteor/Unispliff repository on GitHub, at the commit this page was made from: the board is pcb/Unispliff.kicad_pcb and its schematic pcb/Unispliff.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Unispliff design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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