图1所示的电路故障寻找器是一种在印制电路板上找到连接通路的工具,使用起来很方便。因为你用来测量连接通路的检测电压低于晶体管的V_(BE)电压,所以你可将这一设计应用于含有半导体元件的电路中,而不会影响测量结果。这种电路故障寻找器的输出是音频单音。开路会产生大约每秒一次的嘀嗒声,而短路则会产生一个2kHz单音。音频读出器件最适 The Circuit Fault Finder shown in Figure 1 is a tool that finds the connection path on a printed circuit board and is easy to use. Because the voltage you use to measure the connection path is lower than the V BE voltage of the transistor, you can apply this design to circuits that contain semiconductor components without affecting the measurement results. The output of this circuit fault finder is an audio tone. Open circuit will produce about one tick per second, while short circuit will produce a 2kHz tone. Audio readout device best