The current EE design in regards to the "Magicoil" device consists of four elements: Power, Micro-controller, Signal Generation, and Lock-In/ADC. The Micro-controller is used to control signal generation, receive the return signal from the pick-up coils and communicate with external applications (Android App, PC). The lock-In amplier is for picking up that return signal, and can be modeled as a very tight band-pass lter followed by a very high gain amplier, and is typically used for applications where we are searching for very tiny signals (which is the goal here!). Both the Power and Signal Generation are outlined in further detail below: