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Citronics — Circular electronics

Circular embedded computers,
(re)made at scale from smartphone mainboards.

More than a board: a platform. Everything to take a product from prototype to deployment, across sectors and through its lifecycle. It starts with the CiSoM.

CiSoM

Repurposed mainboard, ready to build on.

Meet the Circular System-on-Module (CiSoM): embedded computing and connectivity, tested and qualified to be integrated in your next product.

Platform

Everything to build, operate, and maintain your product on the CiSoM.

One platform across your product's life, built on the standard, open tools your engineers already use.

  • Build

    Develop on a Linux stack your team already knows.

    Standard operating systems and containerized builds

  • Operate

    Deploy, monitor, and secure your fleet in the field.

    Remote and over-the-air updates, live monitoring, and security patching

  • Maintain

    Keep your product compliant, secure, and supported for its whole life.

    CE-marking and re-certification capable, with security maintenance, warranty, documentation, and support.

Process

From decommissioned phone to a qualified, standardized CiSoM.

An industrial process engineered to drive quality up and cost down.

  1. Smartphone

    1. Retrieval

    Gathered in volume, for supply you can count on.

    Decommissioned smartphones collected in a recycling bin at a repair and refurbishing facility
  2. Mainboard

    2. Extraction

    Recovered at industrial scale, driving the cost down.

    A smartphone opened on the bench, its mainboard being released from the chassis
  3. Mainboard

    3. Testing & reprogramming

    Every faulty unit caught, without slowing the line.

    A mainboard pressed by hand onto a test fixture, its contacts meeting the pins of the green probe board
  4. CiSoM

    4. Reintegration

    Standard assembly and testing, proven quality.

    A qualified module seated on a white Limeboard carrier with Ethernet and USB ports, a probe pin resting on it

Reliability

Circular hardware you can deploy with confidence.

Testing and validation are what make it circular, not just reused. Every unit is assessed with a discipline inspired from aerospace standards: defined pass criteria, test coverage and unit traceability.