[案例及素材]51单片机应用开发25例——基于Proteus仿真\21628-51单片机应用开发25例——基于Proteus仿真(电路图)\应用实例4 手机拨号模块(The device of the utility model is used together with the mobile phone and has the advantages of simple structure, automatic dialing alarm and reliable anti-theft eff