Development of a force control hardware embedded system for a Prototype of Prosthetic Gripper Hand with 1 grade of liberty is shown. A myoelectric signal is used to enable a servo motor movement which permits opening and closing the prosthesis. The prosthesis force is controlled with a Proportional and Integrative (PI) incremental control. Furthermore, a little vibrator motor acts like a haptic interface and it is put on the user arm; the prosthesis force applied against an object is related with the vibrator motor frequency.