2 layers65 × 33.4 mm
BL R8812AF1 2x mount
OpenIPC/hardware
A collection of hardware developments by the OpenIPC team
28 parts33MIT
2 layers71.7 × 40.4 mm
Slowhub
Hasnat4763/SlowhubA USB 2.0 hub based on the SL2.1A
- Size
- 71.7 × 40.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 23
- Pads
- 106
- Tracks, vias
- 185, 8
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 1 Jun 2026
- Updated
- 14 Jun 2026
Overview
Slowhub is an open-source printed circuit board by Hasnat4763, from the Hasnat4763/Slowhub repository on GitHub, published under the MIT licence. It is a 2-layer board of 71.7 × 40.4 mm with 20 parts on 23 nets, routed with 185 tracks and 8 vias.
It is built around the SL2.1A. Its parts include 10 capacitors, 5 connectors, 4 resistors and 1 IC.
Main components
1README
README.mdSlowhub
A USB 2.0 hub based on the SL2.1A
Why did I make it
I had designed another USB 2.0 hub with the same chip before, but I did not have a lot of experience Back then so when I received the PCB, the hub was not fully working, the audio Input/Output part was working great but It could not handle connecting USB peripherals like Pendrives and Keyboard/Mouse. So I decided to design another USB Hub with it to fix the past mistakes.
Gallery
PCB
Schematic
PCB
Case
BOM
| Part name | Quantity | Price | Product Link |
|---|---|---|---|
| SL2.A USB HUB IC | 5 | $1.40 | Link |
| USB A Female Port | 10 | $5.68 | Link |
| USB C Female Port (TYPE-C-02) | 10 | $2.06 | Link |
| Capacitor Kit (0.1uF, 1uf, 10uF) | 1 | $3.67 | Link |
| 5.1k Resistor 0603 | 100 | $1.73 | Link |
| PCB | 5 | $0.18 | JLCPCB |
| 3D printed Case Parts | 2 | Printing Legion | Printing Legion HC |
Build instruction
You will have to use SMD soldering for soldering 90% of the parts. you may need a stencil if you want to use a hot plate, but a soldering iron can be used too. Don't use a lot of heat as that can damage the IC.
Zine
Parts
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C9, C10, C11, C12 |
| 4 | 5.1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R4, R5, R6 |
| 3 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5, C6, C8 |
| 3 | 10uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C4, C7 |
| 3 | USB_A | Connector_USB:USB_A_TE_292303-7_Horizontal | J1, J2, J3 |
| 2 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J5, J7 |
| 1 | SL2.1A | SL2.1A:SO16 | U1 |
Questions
How big is the Slowhub PCB?
It measures 71.7 × 40.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Slowhub 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 Slowhub KiCad files?
From the Hasnat4763/Slowhub repository on GitHub, at the commit this page was made from: the board is PCB/slowhub.kicad_pcb and its schematic PCB/slowhub.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Slowhub design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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