This week I began working with the prototype tic tac toe arm. It is controlled using a motor driver, a Raspberry Pi, and the GPIO software library. At this point it is difficult to use the hardware and software together. The first step is to create a parametric equation of the shape the arm should draw. Next, coordinates are converted into angles that the arm must create. Finally, these angles are converted into “steps” for the motors. This process is complicated, and while the arm can simply turn on and off for a set period of time, specific equations are not yet working.