The Pianocktail circuit, work in progress. There is no sound to this video for some strange reason. Refer to this video for the explanation to how this works: vimeo.com/2049808 . I talk about how the Shift registers detect the keys being pressed on the piano which is then recorded by the Arduino micro controller. When a switch is triggered, all the data is analyzed and then the appropriate pumps will dispense alcohol or juice. In this example only one Valve is being used to demonstrate the circuit.