4 layers99 × 53.3 mm
PSLab
fossasia/pslab-hardware
PSLab Hardware Design and Schematics https://pslab.io
199 parts1.7kApache-2.0
2 layers324 × 122.1 mm
Krunchboard-90
krunchiekrunch/krunchboard-902A custom 75% (84+4+1) sandwich-mount ANSI mechanical keyboard powered by a Raspberry Pi Pico with KMK
- Size
- 324 × 122.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 190
- Nets
- 133
- Pads
- 931
- Tracks, vias
- 746, 54
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 1 Oct 2025
- Updated
- 7 Jul 2026
Overview
Krunchboard-90 is an open-source printed circuit board by krunchiekrunch, from the krunchiekrunch/krunchboard-90 repository on GitHub. It is a 2-layer board of 324 × 122.1 mm with 190 parts on 133 nets, routed with 746 tracks and 54 vias.
It is built around the 1N4148W. Its parts include 92 switches, 91 diodes, 2 resistors and 1 connector. It belongs with the keyboards and input boards and the RP2040 boards of this library.
Main components
1README
README.mdkrunchboard-90
A custom 75% (84+5+1) ANSI mechanical keyboard powered by a Raspberry Pi Pico with KMK
About
This keyboard has 84 regular keys, 5 programmable macro keys, and 1 switch within the rotary encoder.
Special Keys
Media Controls:
-
Double tap F1: Previous media
-
Double tap F2: Pause media
-
Double tap F3: Next media
Rotary encoder:
-
Turn: Volume Up/Down
-
Press/Fn and turn: Brightness Up/Down
-
Double press: Mute
Images
| PCB | 3D View |
|---|---|
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BOM
| Qty | Item | Notes | Cost (USD) | URL |
|---|---|---|---|---|
| 89 | MX-Style key switches | Already have | 9.90 | AE |
| 89 | Kailh MX hotswap socket | Already have | 8.11 | AE |
| 90 | 1N4148W SOD-123 Diode | Already have | 2.32 | AE |
| 1 | EC11E Rotary encoder (With switch) | Already have | 2.42 | AE |
| 3 | MX Stabilizer (3x2u, 1x6.25u) | Already have | 2.42 | AE |
| 1 | ANSI Keycaps set | Already have | 7.00 | AE |
| 1 | Raspbery Pi Pico (RP2040 or RP2350) | Already have | 2.30 | AE |
| 1 | USB-C Socket (SMD) | Already have | 1.00 | N/A |
| 2 | 5.1k/4.7k 0805 SMD resistor | Already have | 1.00 | N/A |
| 4 | M2 Screw (13.9mm max, I used 12mm) | Already have | 1.42 | AE |
| 4 | M2 Heatset Insert (OD3.2mm, 3mm deep) | Already have | 1.73 | AE |
| 6 | Stick-on rubber feet (Optional) | Already have | 1.18 | AE |
| 1 | PCB | (Shipping/Tax included + $20 coupon) | 15.58 | JLCPCB |
| 1 | 3D Printed case and plate (Blueprint only) | print-legion | 4.65 | N/A |
| Total: | 56.38 [20.23] |
Parts
190| Qty | Value | Footprint | References |
|---|---|---|---|
| 90 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +74 |
| 89 | SW_Push_45deg | keyswitches:Kailh_socket_MX_platemount_plated | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW18, SW19, SW20, SW21, SW22, SW23, SW24 +73 |
| 2 | LOGO | LOGO | G***, G*** |
| 2 | R512/R472 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 1 | BOOTSEL | Button_Switch_SMD:SW_SPST_TS-1088-xR025 | SW91 |
| 1 | Diode | Diode_SMD:D_SOD-323_HandSoldering | D91 |
| 1 | KiCad-Logo2_5mm_SilkScreen | Symbol:KiCad-Logo2_5mm_SilkScreen | logo1 |
| 1 | RST | Button_Switch_SMD:SW_SPST_TS-1088-xR025 | SW92 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_SMD | A1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW17 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_HCTL_HC-TYPE-C-16P-01A | J1 |
Questions
How big is the Krunchboard-90 PCB?
It measures 324 × 122.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Krunchboard-90 use?
190 parts, built around the 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 Krunchboard-90 KiCad files?
From the krunchiekrunch/krunchboard-90 repository on GitHub, at the commit this page was made from: the board is kicad9-pcb/krunchboard-90/krunchboard-90.kicad_pcb and its schematic kicad9-pcb/krunchboard-90-plate/krunchboard-90-plate.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Krunchboard-90 design in my own project?
Its repository states no licence, so its author keeps all rights: ask krunchiekrunch before reusing the design.
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