Keeping with the theme of technology, I will present a tutorial on how to connect a 3.5 mm stereo plug to a RCA cable. As you may know, cables and wires are vital parts of electronic devices. They allow the flow of electricity and data. In case you have any question about what these two connections are, I will quickly explain them. A 3.5 mm stereo connector is an input plug commonly seen in headphones and speakers. Connecting it to a 3.5 mm port will allow headphones or speakers to function as they do and deliver sound.