4 layers94 × 52 mm
4 layers70 × 70 mm
Hermes
Shadow220108/Hermes4This is my first iteration of a USB Hub using the FE1.1s IC. I plan to make future versions with more ports and different ICs, It was built to solve the scarcity of ports on my miserable laptop
- Size
- 70 × 70 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 47
- Nets
- 45
- Pads
- 176
- Tracks, vias
- 359, 25
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 7 Apr 2026
- Updated
- 17 Apr 2026
Overview
Hermes is an open-source printed circuit board by Shadow220108, from the Shadow220108/Hermes repository on GitHub. It is a 4-layer board of 70 × 70 mm with 47 parts on 45 nets, routed with 359 tracks and 25 vias.
It is built around the FE1.1S and SRV05-4.
Main components
2README
README.md
Hermes
Hermes is a 4-port USB HUB, using FE1.1s. It has 3 USB-A and 1 USB-C downstream ports, and 1 USB-C upstream port for connecting to the computer. It is a highly integrated, low-power USB 2.0 high-speed bus-powered USB HUB supporting upto 480 MHz signals.
This is my first iteration of a USB Hub using the FE1.1s IC. I plan to make future versions with more ports and different ICs, It was built to solve the scarcity of ports on my miserable laptop
| Animation |
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All the components will be hand soldered by me, and the case will be 3D Printed! The bottom and top cases will be attached together with 4mm magnets!
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The PCB was made in KiCAD (an open-source software), which uses a 4-layer board with a (5V GND 5V GND) stackup to provide a clean GND plane for data signals. It can support up to 480MHz.
PCB
| All layers |
|---|
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| Without Zones |
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Schematics
| Main IC |
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.png) |
| Upstream Port |
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.png) |
| Downstream Ports |
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Simple Build Guide :3
- Order the PCBs and the components
- Assemble the PCB ( Make sure to have appropriate tools such as a hotplate or a reflow station )
- Get the case 3D printed!
- Attach the top and bottom case using 4x1.5mm magnets
- Start using!!
BOM
| Name | Purpose | Quantity | Total Cost (USD) | Link | Distributor |
|---|---|---|---|---|---|
| PCBs | PCB | 5 | 14.00 | jlcpcb | |
| 2A Polyfuse | fuse | 1 | 0.20 | link | robu.in |
| 12 MHz crystal | crystal oscillator | 1 | 0.50 | link | robu.in |
| 10k ohm resistor | resistor | 30 | 0.10 | link | robu.in |
| 2.7k resistor | resistor | 100 | 0.10 | link | robu.in |
| 5.1k ohm resistor | resistor | 100 | 0.10 | link | robu.in |
| 56k ohm resistor | resistor | 100 | 0.10 | link | robu.in |
| 330 ohm resistors | Resistors | 100 | 1.50 | link | Amazon |
| 10uF Capacitors | Decoupling caps | 10 | 0.10 | link | robu.in |
| SRVO-5 | ESD Protection | 10 | 1.50 | link | robu.in |
| USB-A connector | downstream ports | 5 | 0.50 | link | flyrobo.in |
| USB-C connector | upstream and downstream ports | 2 | 0.20 | link | flyrobo.in |
| FE1.1s | Main IC | 1 | 1.10 | link | robu.in |
| Shipping | 4.00 | ||||
| Total | 24.00 USD |
| ZINE |
|---|
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Parts
47| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10u | Capacitor_SMD:C_0603_1608Metric | 10u, 10u, 10u, 10u, 10u, 10u, 10u |
| 7 | LOGO | LOGO | G***, G***, G***, G***, G***, G***, G*** |
| 5 | SRV05-4 | PCM_marbastlib-various:SOT-23-6-routable | SRVO5, SRVO5, SRVO5, SRVO5, SRVO5 |
| 4 | MountingHole | MountingHole:MountingHole_2.5mm | H1, H2, H3, H4 |
| 3 | 330R | Resistor_SMD:R_0805_2012Metric | 330R, 330R, R1 |
| 3 | USB_A | Connector_USB:USB_A_Molex_67643_Horizontal | USBA, USBA, USBA |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric | 22pF, 22pF |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric | 5.1k, 5.1k |
| 2 | 56k | Resistor_SMD:R_0805_2012Metric | 56k, 56k |
| 2 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | USBC, USBC |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric | 10k |
| 1 | 12Mhz | Crystal:Crystal_SMD_5032-4Pin_5.0x3.2mm | 12Mhz |
| 1 | 2.7K | Resistor_SMD:R_0603_1608Metric | 2.7k |
| 1 | 2A | Fuse:Fuse_1206_3216Metric | 2A |
| 1 | ACT | LED_THT:LED_D3.0mm | ACT |
| 1 | FE1.1s | Package_SO:SSOP-28_3.9x9.9mm_P0.635mm | FE1.1s |
| 1 | PORT1 | LED_THT:LED_D3.0mm | PORT1 |
| 1 | PORT2 | LED_THT:LED_D3.0mm | PORT2 |
| 1 | PORT3 | LED_THT:LED_D3.0mm | PORT3 |
| 1 | PORT4 | LED_THT:LED_D3.0mm | PORT4 |
Questions
How big is the Hermes PCB?
It measures 70 × 70 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Hermes use?
47 parts, built around the FE1.1S and SRV05-4. 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 Hermes KiCad files?
From the Shadow220108/Hermes repository on GitHub, at the commit this page was made from: the board is PCB/Hermes.kicad_pcb and its schematic PCB/Hermes.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hermes design in my own project?
Its repository states no licence, so its author keeps all rights: ask Shadow220108 before reusing the design.
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