2 layers103 × 30.5 mm
2 layers56 × 64 mm
Sevenpin
hshit2010/sevenpin2Hi my name is harshit and i started this project 3 days ago with no knowledge of hardware etc and this journey took 3 days in short like this day1: created the schematic, pcb design day 2: completed the pcb and started…
- Size
- 56 × 64 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 9
- Nets
- 14
- Pads
- 55
- Tracks, vias
- 162, 22
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 Aug 2026
- Updated
- 23 Aug 2026
Overview
Sevenpin is an open-source printed circuit board by hshit2010, from the hshit2010/sevenpin repository on GitHub. It is a 2-layer board of 56 × 64 mm with 9 parts on 14 nets, routed with 162 tracks and 22 vias.
Its parts include 7 switches, 1 IC and 1 connector.
README
README.mdseven pin
Hi my name is harshit and i started this project 3 days ago with no knowledge of hardware etc and this journey took 3 days in short like this day1: created the schematic, pcb design day 2: completed the pcb and started on case day 3:completed the case in this project i have 6 keys , rotatory dial and 1 mini oled screen used
hardware
it has Seeed Studio XIAO RP2040 as the main microcontroller
firmware structure
it uses KMK and is structured like this :
-SW1: Copy (Ctrl+C)
-SW2: Paste (Ctrl+V)
-SW3: Cut (Ctrl+X)
-SW4: Undo (Ctrl+Z)
-SW5: Save (Ctrl+S)
-SW6: Select All (Ctrl+A)
-Dial: Volume Up / Down & Mute
softwares used:
- kicad for pcb schematic and design
- fusion360 for case design
- vs code and kmk KMK to write the firmware
licence
MIT
installation
you can install this by clicking on the big green code button and then clicking "download as ZIP"
3D Case Design & Assembly
Case layout
PCB Layout
Schematic
Bill of Materials (BOM)
| Item | |Quantity | Description |
| :--- | :--- | :--- |
| Seeed Studio XIAO RP2040 | 1 | Main microcontroller board |
| Mechanical Switches (Cherry MX style) | 6 | Key switches |
| Rotary Encoder (EC11) | 1 | Encoder with push button |
| 0.91" I2C OLED Display | 1 | 128x32 display module |
| 1x4 Female Header Pin Socket | 1 | 2.54mm socket for OLED |
| 3D Printed Case Parts | 1 Set | Top plate, middle walls, bottom plate |
| M2 / M3 Screws | 4 | Case assembly fasteners |
hope you will love it ;)
Parts
9| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6 |
| 1 | Conn_01x04_Socket | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J1 |
| 1 | MOUDLE-SEEEDUINO-XIAO | footprints:XIAO-Generic-Hybrid-14P-2.54-21X17.8MM | U1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW7 |
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Questions
How big is the Sevenpin PCB?
It measures 56 × 64 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sevenpin use?
9 parts. 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 Sevenpin KiCad files?
From the hshit2010/sevenpin repository on GitHub, at the commit this page was made from: the board is PCB/sevenpin.kicad_pcb and its schematic PCB/sevenpin.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sevenpin design in my own project?
Its repository states no licence, so its author keeps all rights: ask hshit2010 before reusing the design.