CHARGE LAMP CIRCUIT FOR CONSTRUCTION MACHINE

摘要

PROBLEM TO BE SOLVED: To simplify a circuit in a charge lamp circuit.

SOLUTION: The charge lamp circuit comprises: a monitor-internal circuit 7 that feeds a voltage Vacc to an alternator 3 in a monitor device 1 to which a charge lamp 4 is connected when the alternator 3 does not operate or the generated voltage is in a low level, and stops the supply of the voltage when the generated voltage of the alternator becomes high; a voltage detecting circuit 8 that detects the voltage of the monitor-internal circuit; and a control unit 9 that determines whether a voltage detected by the voltage detecting means is lower than a preset voltage and outputs a command for lighting/extinguishing the charge lamp based on the determination.

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