Control your Audio System Volume with your Smartphone. This is an age when more and more people want to run their electronic gadgets using a smart phone. We decided to automate the volume control for a set of remote stereo speakers using an iPhone. The more recent videos we have published showed how antique Lionel Toy Trains can be controlled using only an iPhone. Moving past trains, this video shows the physical parts to be used in the hardware controller, followed by a demo of the…