Light emitting diode systems are disclosed. The inhibitor functions by substantially preventing the attachment or adherence of colony-forming immunogens in the rumen and intestinal tract of host food animals. The bridge includes a generic slave module which provides direct connections to the on-chip bus in the on-chip bus protocol. The fluxgate sensor integrated in the printed circuit board can be mass-produced at a cheap manufacturing cost. The driver circuit generates short-circuit control signals for driving the power switches, which bring about a short circuit of the connection terminals connected to the power switches, independently of the control signals from the control unit. Clipped nails are collected in the closed end of one of the housings.