Various embodiments are directed to a regenerator for use with a regenerative engine. In the slew rate configuration, the capacitance circuit electrically couples a capacitor of the capacitance circuit in a feedback path for reducing a slew rate of a buffered output signal generated by the output buffer. The closing mechanism has an illuminant, at least in certain sections, which emits light when supplied with energy. An estimating unit estimates based on a consumed energy estimating equation, energy consumption and a travelable distance for travel through the travel interval. A cap is coupled to and supported by the base and includes an exit opening. The device comprises an end cap assembly which includes an end cap coupled to a wiring card having an interposer board.