说明：  基于单片机的家居远程遥控，实现振铃识别电路、摘机电路、DTMF双音频信号解码电路、语音提示电路、密码电路、家电反馈电路、家电驱动电路及继电器控制电路等功能
(Microcontroller-based remote control at home and achieve recognition ringing circuit, picking the Electrical and Mechanical Road, DTMF pairs of audio signal decoding circuit, the circuit voice prompts, passwords circuit, feedback circuit appliances, home appliances driver circuit and relay control circuit and other functions)