hardware

# Hardware ⚙
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## [All PyCubed Resources](https://www.notion.so/maholli/All-PyCubed-Resources-8738cab0dd0743239a3cde30c6066452)
Tutorials, design resources, and more!
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## Details:
- 4-layer PCB, minimum trace/spacing > 8 mils.
- Can be fabricated using standard FR4 for prototypes and Isola FR408HR for flight.
  - 50 ohm controlled impedance design spec'd for FR408HR with 11 mils external and 10.7 mils interal trace widths.
  - See [PyCubed's 2019 SmallSat Paper](https://github.com/pycubed/documentation/blob/master/PyCubed_smallsat-paper.pdf) for more discussion on the stack-up.
- Zipped, ready-to-order, gerber files can be found in the root of each revision directory. 
- NOTE: PyCubed layout has been ported from Eagle to KiCad to maintain the open-source nature of the project. Visit [http://www.kicad.org/](http://www.kicad.org/) for more details on this layout tool.
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## Change Log
- [mainboard-v04 ➡ mainboard-v05](https://pycubed.org/v04-v05-Change-Log-7d80b1fb81be423a9da197f820e87538)
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## Interactive Bill of Materials 🛒
- [mainboard-v01](https://pycubed.github.io/hardware/mainboard-v01)
- [mainboard-v02](https://pycubed.github.io/hardware/mainboard-v02)
- [mainboard-v04](https://pycubed.github.io/hardware/mainboard-v04)
- [mainboard-v05](https://pycubed.github.io/hardware/mainboard-v05)
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## License
<a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-sa/4.0/88x31.png" /></a><br />
- Hardware in this repository is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike 4.0 International License</a>.
- Software/firmware in this repository is licensed under MIT unless otherwise indicated.