It is not the first time we share magnificent attempts to replicate the human hand (with or without the respective arm) by several builders, using LEGO Technic or MINDSTORMS [1, 2, 3].
Today just another great example, which takes the challenge some steps further, with amazing results.
As the author (Max Shepherd) explains in the video description,
- Hand movements and wrist abduction/adduction are controlled with LEGO pneumatics.
- Wrist pronation/supination, wrist flexion/extension, and elbow flexion/extension are controlled with LEGO motors (Power Functions).
The main purpose of this project was to accurately mimic the full range of motion of a normal human arm and hand. The secondary goal was to maximize speed and power, yet maintain a consistent ratio between the two for demonstration purposes. It is important to note that it was designed as an above elbow prosthesis, and the yellow shoulder is only meant to act as a static model.