Current hand prostheses that do not use invasive sensors focus on closing and opening all or most of the fingers simultaneously. This provides amputees with the ability to grasp objects and do simple hand gestures. While these prostheses tend to be prohibitively expensive, in recent years 3D printing has become affordable and available to an increasing sector of the population, making the production of prostheses more affordable and accessible.

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This project aims to produce a fully functional 3D-printed hand that someone can control, finger by finger, with surface electrodes placed on top of  muscles of his or her forearm. These electrodes will relay the muscles electrical signals to a microcontroller to determine what the user is doing. The microcontroller will then control the motors such that the robotic hand mimics the user’s finger movement.