基于单片机紫外杀菌灯定时电路设计.doc

基于单片机的紫外杀菌灯定时电路设计 摘 要 近年来随着科技的飞速发展，基于单片机的定时电路总的来说有两种类型。一种是基于模拟技术的传统产品，这种定时器功能简单，尽管曾被广泛用过，但已进入淘汰之列。另一种是基于数字技术的新一代产品，这种产品功能强，是前者的替代之物。本设计开发了一种基于单片机的紫外线杀菌灯定时电路的设计。它造价低，功能全，整体功能性价比高，可适应各种场合的定时预警之用。本设计是经典的单片机定时功能应用设计。设计中应用了单片机定时器的设计功能、单片机的中断使用方法及LCD显示等技术。可以实现任意时间和日期的显示，而且每个时间的初值可以改变，并且可以有定时的功能。 本设计的硬件电路主要包括：STC89S52单片机、时钟芯片、蜂鸣器等器件。在硬件的设计的基础上，通过软件进行发光二极管指示程序、键扫描程序和LCD的显示程序的设计，最终完成本设计。 关键词：定时器；STC89S52单片机；时钟芯片 Design of ultraviolet germicidal lamp timing circuit based on single chipmicrocomputer Abstract In recent years, with the rapid development of technology, microcontroller-based timing circuits in general , there are two types. One is based on traditional analog technology products, this timer function is simple, although once widely used, but has entered deprecated. Another is the new generation of products based on digital technology , this product features strong, is an alternative to the former things . The design and development of a microcontroller based UV germicidal lamp timer circuit design. It is low cost , full-featured , high overall function of cost-effective, can be adapted to various situations timed warning of use . This design is a classic single-chip timing applications. Design application design features a single-chip timers , interrupt the use of the microcontroller and LCD display technology. At any time and can display the date , and the initial value may be changed each time , and may have a timing function. The design of the hardware circuit includes : STC89S52 MCU clock chip, such as buzzers . On the basis of the design of the hardware , software, LED indication by the program , key scan programs and design LCD display program , and the final completion of the design . Keywords:Timer; STC89S52 microcontroller; clock chip目录 摘 要 1 ABSTRACT 2 第一章 绪论 1 1.1 系统背景 1 1.1.1 单片机的电子技术 1 1.1.2 定时器介绍 1 1.2 设计要求 1 第2章　关键技术及研究 2 2.1 主控电路 2 2.2 设计选择单片机的结构 2 2.2.1 管脚说明 5 2.2.2 主要特性 6 2.2.3 振荡器特性 7 2.2.4 STC89C52单片机的工作周期 7 2.3 单片机的工作过程和工作方式 8 2.4 STC89C