Abstract: A multi-functional high intensity discharge automobile headlamp features a circuit board installed within a system control box. The circuit board comprise a circuit for automatic detection and protection so that the voltages of the near lights and far lights can be determined and correctly switched, a circuit for DC/DC conversion connected to a far/near light switch and a DC/AC voltage regulator so that the voltages necessary for the near or far lights can be supplied, a circuit for voltage regulation and high-voltage starting so that the high-voltage power can be suitably controlled, a circuit for near light high-voltage control, a circuit for far light high-voltage control and a DC/AC voltage regulator for providing a low-frequency, square-wave, AC signal for voltage regulation.

Abstract: An automobile multi-purpose DC source protection monitor includes of a fuse protection module; multiple units of fuse being arranged on each fuse-carrier, then respectively connected to electric appliance; individual sensor being provided to form individual detection loop; a signal retrieval module connected to each sensor through transmission wire to convert analog signals detected by each fuse into digital signals; and a display module to clearly indicate the location of a failing fuse, immediate display of voltage, amperage and power in numeric values by means of the signal retrieval module and the digital signals of the detection loop from each fuse on the fuse-carrier.