Functions such as frequency modulation and circuit reset are achieved with different buttons and shown on the LED digital display tube.
并且通过不同按键可以实现调频，电路复位等功能并在LED数码显示管上进行显示出来。
The system's digital voltmeter circuit is simple, can measure the voltage 0 ~ 5v, and the four turns on the LED digital display or a single select Show.
该系统的数字电压表电路简单，可以测量0 ~ 5 V的电压值，并在四位LED数码管上轮流显示或单路选择显示。
With 12 LED digital display, can show the tube voltage, current and count value.
具有12位LED数码管显示，可分别显示电压、电流、计数值。
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