A system of forming simulated seam abrasion on denim materials. For a given target, a controller determines the relevant customers that should receive information about the target, identifies all of the ground stations that can be satisfactorily heard by the relevant customers, and then identifies a smaller subset of ground stations by selecting only those ground stations that are needed to reach all of the relevant customers. The state machine adjusts the current limit lower at light loads such that cycles are not skipped to reduce the operating frequency of the switching regulator into the audio frequency range until the flux density through the transformer is sufficiently low to reduce the generation of audio noise. In one embodiment, the indicator is triggered as the container is actuated by a rotational movement. The integrator stage and the further stage are configured to operate at different clock frequencies.