Measuring the speed of a rotating object is a common requirement. Knowing the speed of table and ceiling fans, as well as ...

Abstract: Hydrogel sensors have been a hot topic of research in recent years. The development of versatile hydrogel sensors has been an urgent problem. In this paper, an electrically conductive, ...

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This DIY 6-DOF robot arm project details a two-year build cycle using 3D printed parts, custom electronics, and over 5,000 ...