Robotic hand - working prosthesis

thingiverse

This is an advanced robotic prosthetic hand that utilizes micro servos for finger movement. Designed specifically for a patient who had lost their right hand, this prosthesis was created to accommodate the unique needs of its user. Fortunately, surgery spared part of the wrist, allowing for customization beyond standard prosthetics. The external design of the hand is inspired by open-source projects F.A.B.L.E. and InMoov, while the internal components have been completely reworked. The fingers are fully articulated, with the exception of the thumb, which has been designed to provide improved grip strength through a single joint. The electronics used in this prosthetic hand rely on Arduino Nano and an NRF24L01 WiFi transmitter, allowing for seamless communication between the prosthesis and a specially designed flex-sensor glove. This innovative approach enables the user to control the hand with ease, without requiring the need for myo-electric input commands that often require signal amplification. A flexible sensor glove has been created for the left hand to replicate its movements, providing an intuitive way to interact with the prosthetic hand. Videos showcasing the hand's capabilities are available online at various addresses. To build this remarkable prosthesis, ABS is recommended as the print material of choice. The forearm parts come in two sizes, ensuring a comfortable fit for users of all shapes and sizes. The electronics require just five micro servos, an Arduino Nano, NRF24L01 connection, a 500 mF capacitor, and a cell phone power bank capable of delivering more than 2A of power. For those interested in learning more about the creation of this remarkable prosthetic hand, detailed building instructions and the patient's story are featured in a book available on Amazon or at sanditlibri.it.