《汽车电器》1983年第2期《介绍一种晶体管充电指示灯电路》一文,提供了利用发电机中性点电压制作晶体管充电指示灯的一般方法。但该文在晶体管电路的设计上不尽合理,因而不必要地使用了大功率管3DD15。 “Automotive” 1983 the second issue of “Introduction of a transistor charging indicator circuit,” a text, the use of generator neutral point voltage provides a general method of making transistor charging indicator. However, the design of the transistor circuit is not reasonable, so the use of high-power tube 3DD15 is unnecessary.