Expansion
About the Expansion PCB
Expansion is an open source PCB design by electron271, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 25.4 × 39.4 mm, with 5 components from 5 distinct parts.
From the project
Keychain shaped like Tux that can run Linux.
Unfortunately this is more expensive than usual due to tariffs and inflation. (Probably cheaper in other countries.)
NOTE: This is still in the prototype stage, changes to the design are likely.
*You can probably find them on other chinese distributors, but I don't know which ones.
Schematic heavily based on the business card design by thirtythreeforty (https://www.thirtythreeforty.net/posts/2019/12/my-business-card-runs-linux/businesscard.pdf).
Expansion bill of materials (BOM)
5 components, 5 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Micro_SD_Card_Det2 | microSD_HC_Molex_104031-0811 | J1 |
| 1 | TRRS | Jack_3.5mm_KoreanHropartsElec_PJ-320D-4A_Horizontal | J2 |
| 1 | EXPANSION | FFC_1x15_P0.5mm | J3 |
| 1 | R | PinHeader_1x09_P2.54mm_Vertical | J4 |
| 1 | L | PinHeader_1x09_P2.54mm_Vertical | J5 |
Expansion design files
The KiCad project lives in the electron271/tuxkeychain repository on GitHub; these links point at the commit this page was built from.
- Layoutexpansion/expansion.kicad_pcb
- Schematicexpansion/expansion.kicad_sch
Expansion: common questions
How big is the Expansion PCB?
The Expansion measures 25.4 × 39.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Expansion?
5 components, from 5 distinct parts. The full bill of materials is listed on this page.
Where can I download the Expansion design files?
From the electron271/tuxkeychain repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Expansion design in my own project?
Yes, under the terms of its CC-BY-SA-4.0 license, which electron271 chose for the repository.
