文档介绍：上饶师范学院
毕业论文(设计)
题目:家用电风扇逻辑控制电路设计
学生姓名:
学号:
学院:物理与电子信息学院
专业:电子信息科学与技术
班级:08级物电系2班
指导教师:
2012 年 4 月 27日
摘要
随着经济的发展,电风扇已是必不可少的家用电器。并且随着科技的发展,电风扇的功能越来越完善,人们也更加注重电风扇的智能化、人性化。
本次实验运用了数字电路的知识,实现了家用电风扇控制逻辑电路设计。设计内容是一个按钮来实现风速强、中、弱的转换并且实现循环;一个按钮来实现风种正常风、睡眠风、自然风的转换并且实现循环;不同颜色LED灯的显示来表示风速与风种的状态。家用电风扇控制逻辑电路分为三大模块:第一个模块是风速、风种的循环控制电路,利用74ls175、74ls08芯片实现三种状态的循环计数,并且利用高低电平实现LED灯的亮灭;第二个模块是风种实现电路,利用555发生器产生周期为8s的方波,并且利用74ls175构成二分频电路形成周期为16s的方波,再利用74ls151芯片选择风种的输出。第三个模块是按钮控制电路,利用按钮来给芯片脉冲,实现风速、风种的选择,并且可以实现关机的功能。
关键字:电风扇循环控制 74ls175 LED
Abstract
With the development of economy, the electric fan is essential for household appliances. And with the development of science and technology, the electric fan function more and more perfect, people also pay more attention to the electric fan intelligent, humane.
This experiment uses the digital circuit knowledge, realize the household electric fan control logic circuit design. Design is a button to achieve a speed of strong, weak, in the conversion and realize the circulation; a button to achieve normal sleep wind, wind, natural wind conversion and recycle; different color LED light display to indicate the state of wind speed and wind. Household electric fan control logic circuit is divided into three modules: the first module is the wind, a circulation control circuit, the use of 74ls175,74ls08 chip to realize three states of cycle counting, and the use of high level to realize the bright LED lights out; the second module is the wind for realizing circuit, using the 555generator generates a cycle8s square wave, and using 74ls175 to constitute the two frequency dividing circuit formation period of 16S square wave, then the use of 74ls151chip select wind output. The third module is a button control circuit, use the buttons to achieve chip pulse, wind, selection of species, and can achieve the shutdown function.
Keywords ;Electric fan Loop control 74ls175 LED
目录
前言 1
第一章设计内容及要求 2
2
设计要求 2
: 2