2 layers253.3 × 113.3 mm
2 layers306 × 125 mm
KBoard
YakshithK/KBoardAn 84-key custom mechanical keyboard built from scratch around the RP2040. No dev module: the RP2040, flash, regulator, USB-C, crystal, and support circuitry are all on the board. Uses Cherry MX Browns.
- Size
- 306 × 125 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 206
- Nets
- 142
- Pads
- 1,088
- Tracks, vias
- 977, 54
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 Sep 2026
- Updated
- 5 Oct 2026
Overview
KBoard is an open-source printed circuit board by YakshithK, from the YakshithK/KBoard repository on GitHub. It is a 2-layer board of 306 × 125 mm with 206 parts on 142 nets, routed with 977 tracks and 54 vias.
It is built around the RP2040, W25Q16JVSSIQ and XC6206-2.8V, with the 1N4148W among its other parts. Its parts include 85 switches, 84 diodes, 17 capacitors, 6 resistors and 4 ICs. It belongs with the RP2040 boards of this library.
Main components
4
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q16JVSSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 10uA 133MHz 16Mbit 2.7V~3.6V 20 Years 3ms SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
XC6206-2.8V
SOT-23-3L-40℃~+85℃@(Ta) 1 1uA 2.8V 250mA 350mV@(30mA) 6V Fixed Over Current Protection Positive SOT-23-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSYONGYUTAIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
README
README.mdKBoard
An 84-key custom mechanical keyboard built from scratch around the RP2040. No dev module: the RP2040, flash, regulator, USB-C, crystal, and support circuitry are all on the board. Uses Cherry MX Browns.
| Top | Bottom |
|---|---|
|  |
Features
- 84 hot-swap MX-compatible switches in a ROW2COL matrix with per-key diodes
- From-scratch RP2040 design with USB-C, 16Mbit flash, and onboard 3.3V regulation
- QMK firmware with RP2040 USB bootloader (drag-and-drop UF2 flashing)
Technical Details
The PCB is a basic 2-layer pcb (306 x 125 mm) using an RP2040 SoC with a USB-C connector. There's also a switch broken on the bottom for boot/reset.
Bill of Materials
Please see: BOM.csv
Repo Index
Start Here
| Path | Purpose |
|---|---|
README.md | Project overview, features, bill of materials, and this repository map |
BOM.csv | Bill of materials |
Hardware: KiCad
| Path | Purpose |
|---|---|
kboard_pcb/KBoard.kicad_pro | KiCad project settings |
kboard_pcb/KBoard.kicad_sch | Source schematic |
kboard_pcb/KBoard.kicad_pcb | Source PCB layout |
Hardware: CAD Files
| Path | Purpose |
|---|---|
CAD/KBoard.step | 3D CAD model in STEP format |
PCB/KBoard.step | 3D CAD model in STEP format |
PCB/KBoard.stl | 3D CAD model in STL format (local only, too large for git) |
Hardware: Production Files
| Path | Purpose |
|---|---|
production/KBoard-gerbers.zip | Zipped Gerbers + drill, ready to upload to the fab |
production/KBoard.step | STEP model bundled for fabrication |
production/gerbers/ | Gerber plot, drill, and pick-and-place files |
production/firmware/ | QMK firmware source and built UF2 for flashing |
Hardware: Visual References
| Path | Purpose |
|---|---|
assets/schematic.svg | Schematic preview |
assets/pcb-top.png | Top-side PCB render |
assets/pcb-bottom.png | Bottom-side PCB render |
Firmware: QMK
| Path | Purpose |
|---|---|
firmware/kboard/keyboard.json | Keyboard identity, RP2040 target, pins, matrix, and layout |
firmware/kboard/rules.mk | QMK build settings |
firmware/kboard/config.h | Board configuration |
firmware/kboard/kboard.h | Keyboard header included by QMK |
firmware/kboard/keymaps/default/keymap.c | Default keymap |
Build the firmware with qmk compile -kb kboard -km default (the firmware/kboard folder must be linked or copied to qmk_firmware/keyboards/kboard). Flash the resulting UF2, also bundled at production/firmware/kboard_default.uf2, by double-pressing reset and dragging it onto the USB drive.
Parts
206| Qty | Value | Footprint | References |
|---|---|---|---|
| 84 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +68 |
| 84 | SW_Push | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +68 |
| 10 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C1, C4, C5, C9, C10, C11, C12, C13, C14, C15 |
| 4 | 1uF | Capacitor_SMD:C_0603_1608Metric | C6, C7, C16, C17 |
| 2 | 15pF | Capacitor_SMD:C_0402_1005Metric | C2, C3 |
| 2 | 1K | Capacitor_SMD:C_0402_1005Metric | R1, R2 |
| 2 | 27R | Capacitor_SMD:C_0402_1005Metric | R3, R4 |
| 2 | 5.1K | Capacitor_SMD:C_0402_1005Metric | R5, R6 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C8 |
| 1 | 500mA | Fuse:Fuse_0402_1005Metric | F1 |
| 1 | Crystal_GND24 | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | ESD | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_CK_RS282G05A3 | SW85 |
| 1 | USB-C | USB4105-GF-A:GCT_USB4105-GF-A | J2 |
| 1 | W25Q16JVSS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U2 |
| 1 | XC6206 | Package_TO_SOT_SMD:SOT-23-3 | U3 |
The 199 most common of 206 parts.
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Questions
How big is the KBoard PCB?
It measures 306 × 125 mm and has 2 copper layers, 1.6 mm thick.
What parts does the KBoard use?
206 parts, built around the RP2040, W25Q16JVSSIQ, XC6206-2.8V and 1N4148W. 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 KBoard KiCad files?
From the YakshithK/KBoard repository on GitHub, at the commit this page was made from: the board is kboard_pcb/KBoard.kicad_pcb and its schematic kboard_pcb/KBoard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the KBoard design in my own project?
Its repository states no licence, so its author keeps all rights: ask YakshithK before reusing the design.