| 摘要 |
A warning lamp arrangement for a vehicle battery charging system comprises three resistors (16, 17, 18) connecting a point (19) to the output terminals of an alternator stator winding (10). The said point (19) is connected to the positive terminal of the battery (12) through a resistor (20) and to its negative terminal through a zener diode (34) and a resistor (35). A pair of comparators (21, 22) having their outputs connected to the base of a Darlington transistor (28, 30) detect if the voltage at the said point (19) is outside a predetermined range. The junction of the zener diode (34) and its as associated resistor (35) is also connected to the base of the Darlington transistor (28, 30). A warning lamp (32) connected in the collector circuit of the Darlington transistor is energized if the alternator does not produce an output or a malfunction occurs in the charging system.
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