I shared my project different times in this forum, but it worth to tell you about it.
My project was prosthetic arm controlled through emg signals, this arm can be used for amputated persons.
The project was common work between electrical and mechanical department in the university, and i did the electrical part of the system.
The robotic arm can make 4 movements of arm movements, and it was controlled through artificial neural network, which is implemented on DSP.
Concerning the mechanical part, my friend designed a robotic arm that can fit some of the requirements of the human arm, concerning the shape, weight, length, but we didn't manufacture it because of financial reasons, so we manufacture another design just a prototype to implement the idea.
It took 4 months to develop this system.
This is a link for a video of the project.
www.youtube.com/watch?v=QOfSVVdxV60