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Claudius: an ESP32 Eurorack oscillator Claude Code designed itself

Given a mostly working ESP32 oscillator repo and the instruction "Be creative!", Claude Code came up with its own complex oscillator design.

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Credits

  • Reddit poster danja Source ↗
  • Repository account danja Source ↗

Earliest dated source: 19 Jan 2026

Code ↗

The full story

The maker had built ESP32 hardware on stripboard and spent a weekend coding a complex oscillator for it. Frustrated, they pointed Claude Code at their mostly working repo with minimal instructions and told it to "Be creative!".

The result, Claudius, uses what Claude called harmonic cascade synthesis, where higher harmonics decay faster than lower ones, plus wavefolding and a chaotic element based on the Lorenz attractor. The maker says it has a long way to go before it is properly usable, but a lot is in place.

How it was done

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Sources

From a short post by the maker, so the details are as they tell them.

  • Reddit: I, Claudius : Eurorack module designed by AIForum threadreddit.com
    Reddit poster: danjaPosted 19 Jan 2026

    The maker's post on r/synthdiy.

    If it disappears: archived copy of Reddit: I, Claudius : Eurorack module designed by AI (opens in a new tab)

  • The code: github.comCode or repositorygithub.com
    Repository account: danja

    Linked in the post.

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Prompt & Solder

An independent community project. Not affiliated with Anthropic.

What this is. Real projects where people used Claude to build, fix, port, revive or take apart something, from jailbroken Kindles to rebuilt DOS games, plus the times it went badly wrong. Every build links to where it was shared, and every source is listed here.

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