Observed arrival · 2026-10-13

Tendra Hand: a human hand, rebuilt in the open

tendrahand.com Visit website

Editorial interest 83/100 Selection signal · not a rating of the site

An open-source, 3D-printed robotic hand project, currently centered on a thumb-and-index-finger prototype with independently driven joints.

Landing page captured for the 2026-10-13 issue.

For: Open-hardware builders, robotics students, and 3D-printing hobbyists
Worth noticing: The project assigns separate licenses to code (Apache-2.0), hardware (CERN-OHL-S-2.0), and documentation (CC BY 4.0).

Field notes

The control path is described as computer-generated joint angles sent over USB to an ESP32-S3, which handles smooth motor movement. The page says the current build uses 28BYJ-48 steppers and names Feetech smart servos as the next step; it also outlines a 20-joint V1 using 16 servos. Code, hardware, and documentation are assigned separate open licenses.

Observed signals

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

ƒJavaScriptBrowser-side code central

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