A stub shaft for a turbine engine is described in which respective masses are positioned along the stub shaft in a balanced rotation relationship for normal rotation. The support structure or extrusion has a channel for receiving and retaining a circuit board with a plurality of light emitting diodes disposed thereon. An activating element for triggering fluid product administering is provided. The data-processing arrangement DPA further comprises an interface INT for temporarily storing a block of data DB in one of a plurality of memory sections MS. The Rx driving circuit includes a multiplexer which receives first and second signals and switches on or off a signal transmission path of the first and second signals, and an integrator which samples and integrates the first and second signals received from the multiplexer.