Imagine being able to work in environments that one could never dream of working in due to hazards. Deep sea diving, repairs in space, all without complex equipment attached to an individual. Heck, you don't even need to touch controls in order to make things work! With a leap motion, you can wirelessly control the hand to lift up objects, work in hazardous environments, and many more applications!
Using the opensource InMoov robot, we were able to 3D print a robotic forearm and hand with a rotational wrist and full control of each digit. For instance, an astronaut in space can easily receive the STL printer files, print out the arm, and with a little bit of labor, have a fully functioning prosthetic.
By combining the prosthetic with the Leap motion, we were able to get a pretty accurate representation of the hand using the Leap Motion's SDK. With some help from Santa Barbara Hackerspace, we were able to print out parts that broke while assembling the arm.
The arm, in it's first iteration, had some issues due to the wires used as tendons that we had available at the time. With usage, these cables stretch and require constant maintenance, an issue that can be solved with thicker gauge wires.
The arm uses a pully system to control each digit, and contains six servos (one for each digit along with one for the wrist). The servos were hooked up to an arduino which communicated via serial to a PC which in turn communicated with the leap motion.