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2 layersUsage, the printed circuit board in 3D

First-party packages 📦 from atopile

Copper layers
2
Thickness
1.6 mm
Parts
5
Nets
25
Pads
33
Tracks, vias
16, 4
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
7 Apr 2025
Updated
29 Apr 2026

Overview

Usage is an open-source printed circuit board by atopile, from the atopile/packages repository on GitHub, published under the MIT licence. It is a 2-layer board with 5 parts on 25 nets, routed with 16 tracks and 4 vias.

Its parts include 3 resistors, 1 capacitor and 1 IC.

README

README.md

First-party packages 📦 from atopile

This is a monorepo for all the loose packages published by atopile.

Project-specific packages are published from their own repos.

Development

Conventions

Package name restrictions:

  • kebab-case

  • starts with a letter

  • "[a-z][0-9-]+"

  • project directories MUST have the same name as the package

  • drivers for ICs SHOULD be in the format "-x?". eg ti-bq240x

    • there should be a single "x" on the end if there are multiple variants of the same part family
    • the manufacturer stub should be omitted if the they already do this for ths
  • modules and files should be named like "x?"

    • "x" is optional if there is only one variant of the part family
    • omit the manufacturer stub from the filename
  • components should be named like ""

  • build names should be:

    • "ref-" for reference designs
    • "test-" for test builds
    • "example-" for example builds
    • if only one IC/set of builds exist in a package, the name can be omitted

Contributing

We welcome contributions! Here's how you can help:

  1. Fork the repository
  2. Create a new branch for your changes
    bash
    git checkout -b feature/your-feature-name
  3. Make your changes
  4. Install and run pre-commit hooks to ensure code quality
    bash
    pre-commit install
    pre-commit run --all-files
  5. Commit your changes with clear, descriptive commit messages
  6. Push to your fork
  7. Open a Pull Request with a clear description of your changes

Please ensure your PR:

  • Follows the package naming conventions above
  • Includes appropriate tests if adding new functionality
  • Has all pre-commit checks passing
  • Has a clear description of the changes

Building Packages

To build all packages in the repository, use the build-all.sh script:

bash
# Build all packages
./build-all.sh

# Build all packages with specific flags (e.g., --frozen)
./build-all.sh --frozen

The script will attempt to build each package and provide a summary report of successes and failures.

Parts

5
QtyValueFootprintReferences
210000ΩUNI_ROYAL_0402WGF1002TCE:R0402R2, R3
1Microchip_Tech_CAP1188_1_CP_TR:QFN-24_L4.0-W4.0-P0.50-BL-EP2.5U1
1100000ΩUNI_ROYAL_0402WGF1003TCE:R0402R1
11FSamsung_Electro_Mechanics_CL05B104KO5NNNC:C0402C1

Questions

What parts does the Usage use?

5 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 Usage KiCad files?

From the atopile/packages repository on GitHub, at the commit this page was made from: the board is packages/microchip-cap1188/layouts/usage/usage.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Usage 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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