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Building an expressive robot head prototype, Ecko, with a Galaxy S10 and a RealMan robotic arm

A developer built an expressive head prototype, Ecko, using a Galaxy S10 paired with a RealMan robotic arm; it is not a complete humanoid robot. The phone provides animated eyes, a camera, a microphone, and a speaker, with ARCore facial landmarks drawn inside the eyes. A Mac backend handles arm movement and Gemini-driven conversation, and displays real-time joint telemetry in a digital twin. Face tracking works within a limited range; the first motion stopped after about seven seconds due to a sign error, and that failure was kept in the build video.

Part of the event: Developer builds expressive robot head Ecko using a phone and a robotic arm

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