“It's one of the best designs I've seen. But for that price you cannot get absolute encoders outside the motor, reliable force/torque sensors (think picking up a strawberry), or tendons. — stefanka, HN commenter and robotics researcher”
You know that feeling when you want to experiment with robotic manipulation and every option costs $2k-$100k? Research-grade dexterous hands like the Shadow Hand run $100k+, and even budget alternatives like the LEAP Hand need ~$2k in Dynamixel servos. The Amazing Hand targets that gap: a hand you can actually afford to break, modify, and iterate on without writing a grant proposal.
Think of each finger as two tiny motors pulling in parallel — if both pull together, the finger curls; if one pulls harder, the finger tilts sideways. A mechanical linkage (ball joints, not cables) synchronizes the two joints of each finger, so you get 2 degrees of freedom per finger from just 2 servos. Rigid plastic bones give structure, while flexible TPU shells wrap the contact surfaces so the hand doesn't crush objects. The whole thing weighs 400g — about the same as a can of soup — and every part is either 3D-printed or available off-the-shelf. For control, you get Python or Arduino examples, and there's a webcam-based hand tracking demo using QP-based inverse kinematics with the Mink library.
If you're a robotics researcher, student, or hardware hacker who wants to experiment with dexterous manipulation without writing a grant, this is your entry point. Not useful if you need industrial-grade force control, repeatable precision, or tactile sensing — the hobby servos and PLA parts won't deliver that. If you're already spending $2k+ on a LEAP Hand, this is the cheaper prototyping step before committing.
Worth exploring as a learning and prototyping tool — the mechanical design is genuinely clever and the documentation is thorough. But be honest about what you're getting: the creators themselves say it hasn't been tested for actual grasping tasks, the PLA parts are too weak for real work (per HN engineering critiques), and the BOM has part supply issues. This is firmly in the experimental/educational category. Check back after the 'Amazing Hand Enhanced' branch merges — that's where the real improvements will land.
Deep-dive insight, Easy and Pro modes, plus action playbooks — the full breakdown is one tap away.