A majority of the structural components for this prototype were made from laser cut acrylic and 3D printed pieces in tandem with two servo motors. One of the biggest challenges for this project was hiding the two servos so that they would not be seen during operation of the howling dog. These large servos were the only ones I had on hand, so I was stuck using them. This was also the first time I designed a custom gear train, using the Solidworks Gear Toolbox to generate the models. In certain iterations of this prototype, the teeth of the gears would often break along with some screw hole geometry, so I had to learn from my mistakes and redesign.