I am new to the area of robotics and hardware related to robotics. I am currently working on a tracking application wherein the moving objectin the view of the camera is tracked. Right now the application can track a moving object by the mouse cursor. I would like to extend the program where the camera moves along with the object. I have to build a pan tilt mechanism to mount my USB webcam. can anyone please provide a pan tilt drawing from which i can start from scratch.