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- 硬件电路比较简单,3个LED指示灯,5个按键控制上下左右及暂停,LCD显示。总共有20关。设计用到了逻辑门控制电路。-The hardware circuit is simple, 3 LED lights, 5 key control above and below and suspension, LCD display. A total of 20 customs. The design used in the logic gate control circuit.