2 layers65 × 33.4 mm
BL R8812AF1 2x mount
OpenIPC/hardware
A collection of hardware developments by the OpenIPC team
28 parts33MIT
2 layers81.3 × 29 mm
Kay4Hub
Kaympe20/USB-Type-KayI made this powered USB Hub because I use a USB Hub at my desk, but not everything works correctly when it doesn't recieve all of the 500mA current.
- Size
- 81.3 × 29 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 23
- Pads
- 94
- Tracks, vias
- 108, 13
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 31 Jul 2025
- Updated
- 6 Aug 2025
Overview
Kay4Hub is an open-source printed circuit board by Kaympe20, from the Kaympe20/USB-Type-Kay repository on GitHub. It is a 2-layer board of 81.3 × 29 mm with 20 parts on 23 nets, routed with 108 tracks and 13 vias.
It is built around the SL2.1A. Its parts include 8 capacitors, 2 resistors, 2 diodes, 1 IC and 1 connector.
Main components
1README
README.md
USB Type-Kay
A USB-A Hub powered by USB-C.
I made this powered USB Hub because I use a USB Hub at my desk, but not everything works correctly when it doesn't recieve all of the 500mA current. It would be much nicer if there was enough power such that each port could have the full power of a regular USB-A port.
Pics
CAD
The entire CAD workspace can be found on Onshape
BOM
| Item | Quantity | Price | Price After Taxes + Shipping |
|---|---|---|---|
| Assembled PCB | 1 | $28.01 | $80.56 |
| 3D Printed Case | 1 | $0 | $0 |
| M2 Hardware | N/a | $6.99 | $7.41 |
| M1 Hardware | N/a | $5.29 | $5.61 |
Total: $93.58
Here's the parts I selected in JLCPCB
Parts
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 10uF | Decoupling_Capacitor:C0603 | C1, C2, C3, C4, C5, C6, C7, C8 |
| 4 | USB-AF-90-14.4X13.6-H7.0-DIP | USB_A_Socket:USB-A-TH_C46407 | USB2, USB3, USB4, USB5 |
| 2 | 5.1k | Resistor:R0402 | R1, R2 |
| 2 | D | Diode:SOD-323_L1.8-W1.3-LS2.5-RD | D1, D2 |
| 1 | LOGO | LOGO | G*** |
| 1 | SL2.1A | CoreChips_SL2.1A:SOP-16_L10.0-W3.9-P1.27-LS6.0-BL | U1 |
| 1 | U-G-04DD-W-01 | USB_A_Plug:USB-A-TH_U-G-04WD-W-01 | USB1 |
| 1 | USB_C_Receptacle_USB2.0_14P | USB_C_Socket:USB_C_Receptacle_XKB_U262-16XN-4BVC11 | J1 |
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Questions
How big is the Kay4Hub PCB?
It measures 81.3 × 29 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Kay4Hub use?
20 parts, built around the SL2.1A. 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 Kay4Hub KiCad files?
From the Kaympe20/USB-Type-Kay repository on GitHub, at the commit this page was made from: the board is pcb/Kay4Hub.kicad_pcb and its schematic pcb/Kay4Hub.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Kay4Hub design in my own project?
Its repository states no licence, so its author keeps all rights: ask Kaympe20 before reusing the design.