A semiconductor device includes an IGBT, a constant voltage circuit, and protection Zener diodes. The utility knife includes a sleeve which receives the blade. Depending on the desired exercise of certain muscle groups, the user engages resistance cables in either the lower protuberance member, or the upper protuberance member. A protection strip can be disposed across the battery access door to prevent debris from clogging the silicon-based transducer assembly. A loop and carrier drive indexes the loops on the carrier toward the clip attachment apparatus.