2 layers228.6 × 76.2 mm
Matrix
PanosEconomou/open-keyboard
A 100% from scratch open source super cool awesome keyboard that will take years to make if ever
104 parts
2 layers228.6 × 80.7 mm
Open keyboard
PanosEconomou/open-keyboardA 100% from scratch open source super cool awesome keyboard that will take years to make if ever
- Size
- 228.6 × 80.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 136
- Nets
- 105
- Pads
- 694
- Tracks, vias
- 598, 101
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 19 May 2026
- Updated
- 11 Aug 2026
Overview
Open keyboard is an open-source printed circuit board by PanosEconomou, from the PanosEconomou/open-keyboard repository on GitHub. It is a 2-layer board of 228.6 × 80.7 mm with 136 parts on 105 nets, routed with 598 tracks and 101 vias.
It is built around the RP2040, W25Q128JVPIQ and AP2112K-3.3, with the USBLC6-2SC6, 1N4148WS and ABM8-272-T3 among its other parts. Its parts include 47 diodes, 17 capacitors, 8 resistors, 4 ICs and 3 switches. It belongs with the keyboards and input boards and the RP2040 boards of this library.
Main components
6
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVPIQ
WSON-8-EP(5x6)-40℃~+85℃ 100,000 cycles 10uA 120ms@(32KB) 128Mbit 133MHz 2.7V~3.6V 20 Years Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection、Power lock protection SPI WSON-8-EP(5x6) NOR FLASH ROHSWinbond ElecNOR FLASH
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
ABM8-272-T3
SMD3225-4P-40℃~+85℃ 10pF 12MHz 50Ω SMD crystal oscillator ±30ppm ±30ppm SMD3225-4P Crystals ROHSAbraconCrystals
README
README.mdopen-keyboard
I want a cool keyboard, and if I am going to spend so much money on a good one that someone else makes why not spend even more money for a worse one that I make?
Journal
There is a journal here somewhere that documents the process.
Acknowledgements
This project uses or is inspired by a lot of open-source tools, projects, and generous people who documented their work. Thank you so much!
Tools & Software
- Keyboard Layout Editor — Ian Prest's layout design tool, used for every layout iteration
- QMK Firmware — the open-source "Quantum Mechanical Keyboard" firmware
- FreeCAD — open-source CAD used for the case design
- KiCad — open-source EDA used for the schematic and PCB
- Blender — used for the renders
- Plate & Case Builder — swillkb's tool for generating plates/cases from a layout
Open-Source Projects & Libraries
- cubiq/OPK — open keycap profile / library (included as a submodule)
- CadQuery — Python-based parametric CAD used for keycap generation
- ai03-2725/MX_V2 — MX switch KiCad component library
- ebastler/marbastlib — recent MX hotswap footprint library (the one I went with)
- kiswitch/kiswitch — switch footprint library
- olkb/olkb_parts — OLKB's CAD parts, referenced for case design
- adafruit/Adafruit-Feather-RP2040-PCB — RP2040 reference design
- Unified Daughterboard standard — daughterboard spec for the gasket-mount design
- network2501/planck — long-press shift layout idea
Guides & Articles
- Ruiqi Mao's Keyboard PCB Guide — invaluable PCB walkthrough
- The Planck Constant — thoughtful write-up on Planck layout design
- Evan Travers — 40% keyboard layouts — community layout roundup
- Designing Keycaps for Fun and Profit (kbd.news) — PBS keycap creator's guide
- RP2040 Hardware Design Guide (Raspberry Pi)
- How to make your PCB hotswappable
Community Threads & Inspiration
- r/olkb and r/MechanicalKeyboards — the wikis, guides, and countless threads
- Detailed guide to making a custom keyboard
- Default Planck layout thread and Planck PCB options
- 40s keycaps — where to begin
- Gasket mounting discussion (geekhack) and switch LED orientation (geekhack)
- Planck PCB rev 6 (imgur) — component-margin reference
- Geonix and YMDK Air 40 builds that got me started (linked in the README)
Parts
136| Qty | Value | Footprint | References |
|---|---|---|---|
| 47 | 1N4148WS | Diode_SMD:D_SOD-323 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +31 |
| 47 | MX_SW_HS | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX1, MX2, MX10, MX11, MX12, MX13, MX14, MX15, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX23 +31 |
| 11 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C6, C7, C8, C9, C11, C12, C14, C15, C16, C17 |
| 8 | M2 | MountingHole:MountingHole_2.2mm_M2_Pad | H1, H2, H3, H4, H5, H6, H7, H8 |
| 4 | 1u | Capacitor_SMD:C_0402_1005Metric | C2, C3, C10, C13 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric | R3, R6 |
| 2 | 15p | Capacitor_SMD:C_0402_1005Metric | C4, C5 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | 27.4 | Resistor_SMD:R_0402_1005Metric | R7, R8 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_TL3342 | SW1, SW2 |
| 1 | ABM8-272-T3 | Crystal:Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mm | X1 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U5 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U4 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | W25Q128JVP | Package_SON:WSON-8-1EP_6x5mm_P1.27mm_EP3.4x4.3mm | U3 |
| 1 | choc_stab | PCM_marbastlib-xp-choc:STAB_choc_2u | S1 |
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Questions
How big is the Open keyboard PCB?
It measures 228.6 × 80.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Open keyboard use?
136 parts, built around the RP2040, W25Q128JVPIQ, AP2112K-3.3 and USBLC6-2SC6. 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 Open keyboard KiCad files?
From the PanosEconomou/open-keyboard repository on GitHub, at the commit this page was made from: the board is pcb/v1/v1.kicad_pcb and its schematic pcb/gasket-mount/controller/controller.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Open keyboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask PanosEconomou before reusing the design.