2 layers189.5 × 204.9 mm
SmartSpin2k Panelized
doudar/SmartSpin2k
Transform your spin bike into a Smart Trainer!
749 parts292GPL-2.0
2 layers147.9 × 104.8 mm
Klein
snsten/Klein288Klein keyboard is a 36 keys, columnar staggered, split ergo keyboard
- Size
- 147.9 × 104.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 83
- Nets
- 60
- Pads
- 727
- Tracks, vias
- 2,004, 127
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 23 Oct 2022
- Updated
- 30 Mar 2024
Overview
Klein is an open-source printed circuit board by snsten, from the snsten/Klein repository on GitHub. It is a 2-layer board of 147.9 × 104.8 mm with 83 parts on 60 nets, routed with 2,004 tracks and 127 vias.
It is built around the EG1218. Its parts include 20 switches, 19 diodes, 4 connectors, 3 ICs and 2 resistors. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) and nRF52 and nRF5x boards of this library.
Main components
1README
README.mdKlein Keyboard
Klein keyboard is a 36 keys, columnar staggered, split keyboard named after Felix Klein
Features
- Column Staggered
- Bluetooth compatible with power switch
- Seeed Studio XIAO-BLE / Pro Micro / nice!nano* / KB2040 / RP2040(boards with Pro Micro pinout) compatible
- Hotswap MX and Choc switches support
- Trackpad support with FPC cable and direct wiring
- Reversible SMD and through hole diode footprint
* nice!nano firmware not available at the moment.
Versions
Supports multiple options of micro controller and sensors.
| Features Supported | Microcontroller | Firmware available | Wired | Wireless |
|---|---|---|---|---|
| Encoder or OLED | XIAO-BLE | Yes | Yes | |
| Encoder, OLED, TouchPad, Buzzer, Haptics | Pro Micro | Yes | Yes | |
| Encoder, OLED, TouchPad, Buzzer, Haptics | KB2040/RP2040 | Yes | Yes | |
| Encoder and OLED | nice!nano | No (Planned) | Yes |
Broadly divided in two types:
Wireless
- Can be made with Seeed Studio XIAO-BLE
- Supports either rotary encoder or OLED
- Battery connectors JST and THT
Wireless touchpad is currently not supported in ZMK.
Wired
- With any Pro Micro based boards
- Can support encoders, OLED, Touchpad, Buzzer and Haptics
Keyboard Images
PCB with both Choc and MX switches
Low Profile Choc version
MX version
Repo Layout and Files
.
├── BOM
│ ├── BOM-3235-SEEED.csv <- BOM
│ └── ibom.html
├── Case
│ └── *.stl <- Case stl Files
│ └── Prototype <- FreeCad project files (Not tested)
│ └── SwitchPlateFR4 <- SwitchPlate PCB files (Not tested)
├── docs
│ └── images
├── Logo
├── PCB
└── README.mdBOM
It is available in BOM directory as csv file and interactive HTML BOM
Build Guide
Todo
- Add Build Guide
- Add Touchpad related 3D Models
- Software support for Touchpad/OLED
Firmware
- ZMK shield for Klein with rotary encoder support.
- QMK Firmware for Pro Micro with touchpad support.
Refrences
These projects inspired and helped in making Klein:
Parts
83| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | DIODE | kbd:D3_TH_SMD | D1, D2, D3, D4, D5, D6, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19 +3 |
| 18 | MX_SW_HS | Lily58_Pro-footprint:MX_Choc_Hotswap_Mod | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW10, SW11, SW12, SW13, SW14, SW15, SW17, SW18, SW19 +2 |
| 8 | Jumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8 |
| 6 | MountingHole | MountingHole:MountingHole_3.2mm_M3_ISO7380_Pad | H1, H2, H4, H5, H6, H8 |
| 2 | 4.7K | Lily58-footprint:RESISTOR | R1, R2 |
| 2 | GND Jumper | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP11, JP13 |
| 2 | Jumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP9, JP10 |
| 2 | LOGO | Logo:klein_small | G33, G34 |
| 2 | LOGO | Logo:klein | G3, G4 |
| 2 | MountingHole | MountingHole:MountingHole_2.2mm_M2_ISO7380_Pad | H9, H10 |
| 2 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP16, JP17 |
| 2 | VCC Jumper | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP12, JP14 |
| 1 | Battery Pads | Connector_Wire:SolderWire-0.5sqmm_1x02_P4.8mm_D0.9mm_OD2.3mm | B2 |
| 1 | Buzzer | KLOR:Buzzer_Mallory_AST1109MLTRQ_reversible | BZ1 |
| 1 | Conn_01x04 | Connector_Wire:SolderWire-0.1sqmm_1x04_P3.6mm_D0.4mm_OD1mm | J3 |
| 1 | Conn_01x12 | Connector_FFC-FPC:Hirose_FH12-12S-0.5SH_1x12-1MP_P0.50mm_Horizontal | J1 |
| 1 | EG1218 | SSAJ110100:RevSlideSwitch | S1 |
| 1 | Haptic Buzz | KLOR:Pimoroni Haptic Buzz DRV2605L Driver | J2 |
| 1 | JST Battery | KLOR:JST_PH_reversible | B1 |
| 1 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H3 |
| 1 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H7 |
| 1 | OLED-128x64 | display:OLED-128x64 | J5 |
| 1 | ProMicro | Lily58-footprint:ProMicro_rev2 | U2 |
| 1 | RotaryEncoder_Switch | reversible-kicad-footprints:MX-1U-EC11_Switch | SW16 |
| 1 | SW_Push | KLOR:SW_Push_1P1T-MP_NO_Horizontal_Alps_SKRTLAE010_both_sides | RSW1 |
| 1 | TRRS | kbd:MJ-4PP-9 | U3 |
| 1 | Trackpad_Mount | reversible-kicad-footprints:Trackpad Mount | T1 |
| 1 | XIAO-BLE | xiao:XIAO-BLE | U1 |
Questions
How big is the Klein PCB?
It measures 147.9 × 104.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Klein use?
83 parts, built around the EG1218. 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 Klein KiCad files?
From the snsten/Klein repository on GitHub, at the commit this page was made from: the board is PCB/klein.kicad_pcb and its schematic Case/Prototype/SwitchPlateFR4/klein.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Klein design in my own project?
Its repository states no licence, so its author keeps all rights: ask snsten before reusing the design.
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