It has a 6.13 inch, 824 x 1648 pixel black and white E Ink display with 300 pixels per inch, making the device a sort of pocket-sized eReader sort of like the Onyx BOOX Palma series. But unlike ...

Abstract: This letter introduces a novel linear actuator with a high extension ratio, achieved through a unique planar transforming linkage mechanism (TLM) that serves as an articulated lead screw.

The solution? A 3D printed housing that converts a servo’s rotation into linear motion. The actuator uses five different parts, a few screws, and a common RC servo. The video shows the actuator ...