4 layers99 × 53.3 mm
PSLab
fossasia/pslab-hardware
PSLab Hardware Design and Schematics https://pslab.io
199 parts1.7kApache-2.0
2 layers230.3 × 96.9 mm
Just another keyboard
- Size
- 230.3 × 96.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 93
- Nets
- 80
- Pads
- 400
- Tracks, vias
- 442, 64
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 7 Jan 2026
- Updated
- 3 Jul 2026
Overview
Jak is an open-source printed circuit board by drewlwhitney, from the drewlwhitney/jak repository on GitHub. It is a 2-layer board of 230.3 × 96.9 mm with 93 parts on 80 nets, routed with 442 tracks and 64 vias.
It is built around the 1N4148W. Its parts include 36 diodes and 36 switches. It belongs with the nRF52 and nRF5x boards of this library.
Main components
1README
pcb/README.mdPCB
The PCB is non-reversible and is designed for Gateron KS-33 Low Profile Switches with hotswap sockets.
Front
Back
Ordering
This was written on January 7, 2026 for JLCPCB.
Upload the PCB Gerber Files (.zip) to JLCPCB, then leave everything as-is except for:
| Option | Value |
|---|---|
| Different Design | 2 |
| PCB Color | Your choice |
Parts
93| Qty | Value | Footprint | References |
|---|---|---|---|
| 36 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +20 |
| 36 | SW_Push | Gateron_KS33_Hotswap:Gateron-KS33-Hotswap-1U | SW1, SW10, SW10_r1, SW11, SW11_r1, SW12, SW12_r1, SW13, SW13_r1, SW14, SW14_r1, SW15, SW15_r1, SW16, SW16_r1, SW17 +20 |
| 8 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4, H5, H6, H7, H8 |
| 2 | PTS526 SM15 SMTR2 LFS | footprints:SON4_PTS526 SM15 SMTR2 LFS_CNK | RES_r1, RES1 |
| 2 | SW_SPDT | Button_Switch_SMD:SW_SPDT_PCM12 | power_r1, power1 |
| 2 | USB_C_Receptacle_USB2.0_14P | USB4505-03-0-A_REVA:GCT_USB4505-03-0-A_REVA | split_connector_r1, split_connector1 |
| 2 | XIAO-nRF52840-SMD | jak:XIAO-nRF52840-SMD-underside | controller_r1, controller1 |
| 1 | Conn_01x02 | S2B-PH-K-S_LF__SN_:JST_S2B-PH-K-S_LF__SN_ | jst1 |
| 1 | S2B-PH-K-S_LF__SN_ | S2B-PH-K-S_LF__SN_:JST_S2B-PH-K-S_LF__SN_ | jst_r1 |
The 90 most common of 93 parts.
Questions
How big is the Jak PCB?
It measures 230.3 × 96.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Jak use?
93 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 Jak KiCad files?
From the drewlwhitney/jak repository on GitHub, at the commit this page was made from: the board is pcb/jak.kicad_pcb and its schematic pcb/jak.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Jak design in my own project?
Its repository states no licence, so its author keeps all rights: ask drewlwhitney before reusing the design.
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