4 layers99 × 53.3 mm
PSLab
fossasia/pslab-hardware
PSLab Hardware Design and Schematics https://pslab.io
199 parts1.7kApache-2.0
2 layers351.6 × 122.5 mm
Socketkeeb (keyboard) is a custom keyboard I designed in 4 days from PCB to CAD for HackClub's Highway program.
- Size
- 351.6 × 122.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 193
- Nets
- 159
- Pads
- 997
- Tracks, vias
- 2,012, 246
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 Jun 2025
- Updated
- 20 Jul 2025
Overview
Proj3 is an open-source printed circuit board by SamhithPola2025, from the SamhithPola2025/Socketkeeb repository on GitHub. It is a 2-layer board of 351.6 × 122.5 mm with 193 parts on 159 nets, routed with 2,012 tracks and 246 vias.
It is built around the WS2812B. Its parts include 120 diodes, 71 switches and 1 resistor. It belongs with the RP2040 boards of this library.
Main components
1README
README.mdSocketkeeb
Socketkeeb (keyboard) is a custom keyboard I designed in 4 days from PCB to CAD for HackClub's Highway program. This keyboard was inspired by my need for a keyboard that had low profile switches because those are my favorite type of switches but I could not find a budget one anywhere, so I said why not just make it myself, because that's the solution to most things in life unless its rocket science.
Challenges
- Designing a PCB compatible with both RP2040 and Kailh Choc switches
- Sourcing components from multiple vendors while managing shipping costs
- Ensuring 3D printed keycaps fit properly on low-profile switches
- Aligning stabilizers and switches without a plate (plateless design quirks)
Why I made this
- I wanted a fully custom keyboard with low-profile Choc switches and RP2040 brain
- I wanted to learn about PCB design, BOM creation, and firmware flashing
- I like the idea of 3D printing keycaps for a unique personal touch
- It’s a fun project to build something that’s truly mine from scratch
What went good
- Successfully generated a clean BOM and Markdown table for GitHub
- Found all parts at reasonable prices from trusted vendors
- 3D printed keycaps turned out better than expected using PLA
- The design workflow in CAD + PCB tools was smoother than I thought
BOM: (In BOM.csv too)
| Reference | Quantity | Value | Footprint | Manufacturer | Part Number | Description | Unit Price (USD) | Total Price (USD) | Source Link |
|---|---|---|---|---|---|---|---|---|---|
| STAB | 1 set | n/a | PCB Mount | Gateron | n/a | Gateron PCB-mounted stabilizer set (various sizes) | 8.00 | 8.00 | Gateron |
| U1 | 1 | RP2040 | Pico W | Raspberry Pi | SC0918 | Raspberry Pi Pico W microcontroller | 7.65 | 7.65 | DigiKey |
| SW1-SW70 | 70 | Kailh Choc Violet | Kailh PG1350 | Kailh | PG1350 | Kailh low-profile Choc Violet switch (70 pcs) | 44.74 | 44.74 | AliExpress |
| D1-D200 | 200 | 1N4148 | DO-35 | ON Semi | 1N4148 | 1N4148 100V 200mA diode (200 pcs) | 6.76 | 6.76 | DigiKey |
| KC1-KC70 | 70 | n/a | n/a | 3D printed | n/a | Custom 3D printed keycaps | 0.00 | 0.00 | n/a |
| Subtotal | 67.15 | ||||||||
| Estimated total (with shipping/tax rounded) | 100.00 |
Design Pictures:
Build Pictures:
My printer broke down, not enough time for printing legion, have to go to Barcelona tommorow. Decided to 3D print what I could, and I got permission to submit demo form without keycaps. Hope that clears up a few things regarding the demo video!
Parts
193| Qty | Value | Footprint | References |
|---|---|---|---|
| 68 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D14, D15, D16, D17, D18, D23, D24, D25, D103, D104, D105, D106, D107, D112, D113, D114 +52 |
| 63 | SW_Push | Keebio-Parts:Kailh-PG1350-1u | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW17, SW18, SW20, SW21, SW22, SW23, SW24, SW25, SW26 +47 |
| 51 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1, D10, D11, D12, D100, D101, D102, D108, D109, D110, D115, D116, D117, D118, D119, D120 +35 |
| 2 | SW_Push | Keebio-Parts:Kailh-PG1350-2.25u-No-Clickhole | SW19, SW60 |
| 2 | SW_Push | Keebio-Parts:Kailh-PG1350-1.5u | SW15, SW63 |
| 2 | SW_Push | Keebio-Parts:Kailh-PG1350-2u | SW3, SW68 |
| 1 | 1N4148 | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D111 |
| 1 | 440 | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | RaspberryPi_Pico_W | Module:RaspberryPi_Pico_W_SMD_HandSolder | A1 |
| 1 | RotaryEncoder_Switch | Keebio-Parts:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW66 |
| 1 | SW_Push | Keebio-Parts:Kailh-PG1350-1.75u-No-Clickhole | SW16 |
Questions
How big is the Proj3 PCB?
It measures 351.6 × 122.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Proj3 use?
193 parts, built around the WS2812B. 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 Proj3 KiCad files?
From the SamhithPola2025/Socketkeeb repository on GitHub, at the commit this page was made from: the board is PCB/Proj3.kicad_pcb and its schematic PCB/Proj3.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Proj3 design in my own project?
Its repository states no licence, so its author keeps all rights: ask SamhithPola2025 before reusing the design.
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