Concept: El3ctric Arm

   This is an electric arm made out if EV3 parts. It works by measuring the rotations of the motors, storing the information, and 

  executing the action.

     Because Lego Mindstorms Ev3 can measure motor rotations, you can turn the motor and it will act like a sensor.

The idea is that you move this arm the way you want it to act, then press the button on the front. It will do the exact thing that you made it do, on its own.

     The hand on the end works by having one of the "fingers" attached, and the other two on the motor.