Bionic Arms — Low-Cost Articulated Prosthetic

Designed and 3D-printed a fully articulated prosthetic arm exploring biomechanics, CAD, and accessible assistive tech for under $50. Tendon-driven fingers (MG995) + independent thumb (MG90S), Arduino Uno control. Published on Instructables with STL files.

Functional 5-DOF grasping prototype; Instructables publication + public STL download; total BOM under $50 vs. commercial five-figure devices.

Hardware that serves people: cost, reliability, and open documentation as product decisions, not just maker flex.

Tendon stretch, servo current limits, and joint alignment forced iterative mechanical redesign — textbook engineering loop under tight cost constraints.

Evidence

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