毕业设计说明书(论文)外文摘要 Title Design Of Alarm System Based on MCU Abstract People more and more hope a safely living space for the increasing crime of embezzling and looting. Because conventional security doors and windows can’t meet people’s routing guard more and more,people urgently need a kind of intelligent alarm system in their houses. After researching many different kinds of alarm systems in the market, discovering that design alarm systems by MCU have strong points such as smart、low price、high integrated level and so on.Using MCU to develop alarm system can made the system operated easily and cost lower,so it can be widely used.The design use AT89C2051 as the core department and the control component .Adopting a horn as a alarm unit.And adding some other components, using C language to control the MCU to complete the system alarm.The whole alarm system is made up by the power source、MCU controller、command control part and alarm unit.Moreover by taking some hardware and software antijamming measures can raise the systems’ dependabilities. Keywords alarm control MCU C language