One of the essential factors in the operation of this circuit is the utilization of transformer denoted as T1 which has excellent resistance and insulation for short circuits making it a good quality. It is responsible for transferring electric energy or alternating current from one circuit to another via conductors that are coupled inductively. A transformer is composed of two or more coils of conducting element, like a wire, wrapped around a core where a magnetic field is produced by an alternating current in one coli. This will induce the same current in the other coils.