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代码说明：

  基于51单片机的红外线解码，控制继电器的开关，从而控制灯等电气的开关，实现简单的红外线无线控制。(Infrared decoding based on 51 single-chip computer controls the switch of relay, so as to control the switch of electric lights and so on, so as to realize simple infrared wireless control.)