One of the major things I wanted to keep for this project was the Power/Volume switch to turn on and off the computer. To do this I had to make the toggle type switch to a momentary switch that a PC uses to turn on and off. I did this by using a Arduino micro and a 5v relay. While I could have used just a normal circuit  to this I figured I might need the Arduino if I wanted to convert the other knobs for various function as well.