A mold including a first mold part and a second mold part define a mold cavity therebetween. When constructing the building, megablocks having a height that extends to a plurality of floors are produced, and together with combining those megablocks, concrete is poured inside them to form a wall member composed of a megawall structure of steel plate reinforced concrete construction. The first panel comprises a first pocket to hold the portable digital device, wherein the top cover of the first pocket is made using a transparent material, wherein the first panel flips open to enable a user to operate the portable digital device though the transparent or semi-transparent top cover. The switch having a rocker member coupled to the housing for providing a rocker function, the rocker member defining a central opening for receiving the upper portion of the toggle member, and having a second contact element coupled thereto. Non-overlapping boost operating and buck operating ranges are provided by the common duty-cycle setpoint signal.