2 layers138.1 × 114.3 mm
Left
twangodev/dsk
The developer's split keyboard (dsk) is an open-source, ergonomic, and customizable keyboard for developers.
90 partsCERN-OHL-S-2.0
2 layers138.1 × 95.3 mm
The developer's split keyboard (dsk) is an open-source, ergonomic, and customizable keyboard for developers.
- Size
- 138.1 × 95.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 71
- Nets
- 83
- Pads
- 300
- Tracks, vias
- 166, 3
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 23 Jan 2025
- Updated
- 9 Feb 2025
Overview
Pad is an open-source printed circuit board by twangodev, from the twangodev/dsk repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 138.1 × 95.3 mm with 71 parts on 83 nets, routed with 166 tracks and 3 vias.
It is built around the ATMEGA32U4-AU and AFA07-S12FCA-00. Its parts include 29 switches, 28 diodes, 6 capacitors, 3 resistors and 3 connectors. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA32U4-AU
QFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH QFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
AFA07-S12FCA-00
SMD,P=1mm,卧贴-45℃~+85℃ 0.3mm 12P 1mm 2.5mm 500mA 50V Bottom Contact Copper alloy Slide Lock Surface Mount, Right Angle Tin SMD,P=1mm,卧贴 FFC, FPC (Flat Flexible) Connector Assemblies ROHSJSFFC, FPC (Flat Flexible) Connector Assemblies
README
README.mddsk
The developer's split keyboard.
The Developer's Split Keyboard (dsk) is an open-source, ergonomic, and customizable keyboard for developers.
About
dsk is a modular split keyboard built for developers, offering both ergonomic flexibility and a traditional typing experience. It consists of:
- dsk: A split keyboard that can be used separately for ergonomic comfort or joined for a standard layout.
- dsk-pad: A multilayer macropad with three rotary encoders, navigation, arrow keys, numpad, and an OLED display for additional functionality.
Design Philosophy
The dsk project is built around the following core principles:
- Ergonomic and comfortable for long typing sessions, while still maintaining a familiar layout for developers.
- Should minimize the footprint on your desk while providing all the keys you need for development (F-keys, navigation, arrow keys, etc.).
- Should be modular, breaking down into smaller components that can be placed in different configurations to suit your needs.
- Easy to manufacture, assemble, and program, using off-the-shelf components, established open standards, and open-source firmware.
Manufacturing
[!NOTE]
This project is still in development and manufacturing details and documentation will be added soon!
dsk can be easily made using additive methods (3D printing, resin, SLS) or CNC milling. Full details at dsk.twango.dev/docs.
[!TIP] Students and educators commonly have access to 3D printers and CNC machines through their institutions! Check with your school or local makerspace for more information.
Parts
71| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | Diode | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +12 |
| 26 | MX Switch | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | S1, S2, S10, S11, S12, S13, S14, S15, S16, S18, S19, S20, S21, S23, S24, S25 +10 |
| 3 | 100nF | Capacitor_SMD:C_0402_1005Metric | C4, C5, C6 |
| 2 | 20nF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 22Ω | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | MX Switch | Button_Switch_Keyboard:SW_Cherry_MX_2.00u_Vertical_PCB | S17, S22 |
| 1 | 10kΩ | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 16mHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 781710004 | Connector_Molex:Molex_Pico-EZmate_78171-0004_1x04-1MP_P1.20mm_Vertical | J1 |
| 1 | AFA07-S12FCA-00 | Connector_FFC-FPC:JUSHUO_AFA07-S12FCA-00_1x12-1MP_P1.0mm_Horizontal | J2 |
| 1 | ATmega32U4-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | AVR-ISP-6 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | SW_Reset | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW1 |
Questions
How big is the Pad PCB?
It measures 138.1 × 95.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pad use?
71 parts, built around the ATMEGA32U4-AU and AFA07-S12FCA-00. 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 Pad KiCad files?
From the twangodev/dsk repository on GitHub, at the commit this page was made from: the board is pcb/pad/pad.kicad_pcb and its schematic pcb/i2c-trrs/i2c-trrs.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pad design in my own project?
Its repository publishes it under the CERN-OHL-S-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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