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５１５ＬＣＤ模块用电源电路通常不直接将ＬＣＤ模块组装在设备中（例如，把电压表装在电源中），因为ＬＣＤ模块的电源不能从设备的电源获得（也许被测的是浮动电压）。这种困难可以用这里给出的电路解决，该电路可从现有的直流电源派生出直流电压，并通过电容器隔直流。...
The 515LCD module power circuit usually does not directly assemble the LCD module into the device (for example, install the voltmeter in the power supply) because the power to the LCD module can not be obtained from the power supply of the device (perhaps a float voltage is being measured). This difficulty can be solved with the circuit presented here, which can derive the DC voltage from an existing DC source and cut off the DC current through the capacitor. ...