8路彩灯控制电路设计

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1、《8路彩灯控制电路设计》课程设计报告专业：班级：姓名：学号：指导教师：2014年6月25日目录1.课程设计的目的·········································12.课程设计题目描述和要求································13.电路设计··············································14.设计过程中遇到的问题及解决办法·························75.结论与体会············

2、·································8附表参考书目············································91.课程设计目的1.熟悉仿真软件Multisim,使用软件经行电路仿真；2.掌握数字电路课程学习的常见芯片的功能，熟悉其工作原理；3.了解数字系统设计的基本思想和方法，学会科学的分析问题、解决问题；4.增强学生动手能力，增加学生理论和实践结合的机会。2.课程设计题目描述和要求设计题目八路彩灯控制电路设计，即设计并制作8路彩灯控制电路，用以控制8个

3、LED按照不同的花色闪烁设计要求1．接通电源，电路开始工作，LED灯闪烁；2．LED灯按照事先设计的方式工作，要求闪烁的模式不能少于三种模式3.电路设计3.1闪烁花型设计花型Ⅰ：8路彩灯分成两半从右到左依次点亮，全亮后再从右到左依次熄灭。花型Ⅱ：8路彩灯由中间到两边对称的依次点亮，全亮后仍由中间到两边对称熄灭。花型Ⅲ：8路彩灯分成两半从左到右依次点亮，全亮后再从左到右依次熄灭。花型Ⅳ：8路彩灯由两边到中间对称的依次点亮，全亮后仍由两边到中间对称熄灭。花型状态编码表如表3.1.1所示。每种花型连续循环两次，四种花型

4、轮流交替，为了更好的显示结果本文用指示灯模拟彩灯。表3.1.18路彩灯输出状态编码表节拍脉冲Q0Q1Q2Q3Q4Q5Q6Q7花型Ⅰ花型Ⅱ012345678000000000001000100110011011101111111111111101110110011001000100000000000000000000001100000111100011111101111111111100111110000111000000100000000节拍脉冲Q0Q1Q2Q3Q4Q5Q6Q7花型Ⅲ花型Ⅳ012345678000

5、0000010001000110011001110111011111111011101110011001100010001000000000000000010000001110000111110011111111111011111100011110000011000000000003.2设计原理3.2.1系统的逻辑功能分析彩灯控制电路的原理框图如图3.2.1所示，它主要由控制器、编码器和脉冲信号发生器等部分组成。脉冲信号发生器控制器编码器8路彩灯编码信号（报告正文部分）：图3.2.1彩灯控制器原理图编码器根据花型

6、按节拍输出8路编码信号，控制彩灯按规定的规律亮、灭；控制器为编码器提供所需的节拍脉冲及控制信号，控制整个系统的工作；脉冲信号发生器为系统提供时钟脉冲信号。3.2.2器件的选择74LS194N·························································2片74LS161N·························································2片74LS04D·······························

7、··························6片74LS76D·························································1片时钟电压源·······················································1个VCC（5V）·························································3个3.3设计方案（1）编码器的设计。分析表3.1.1，实现花型Ⅰ时前四位Q0

8、Q1Q2Q3为左移环形计数器的规律，后四位Q4Q5Q6Q7为左移环形计数器的规律；实现花型Ⅱ时前四位Q0Q1Q2Q3为左移环形计数器的规律，后四位Q4Q5Q6Q7为右移环形计数器的规律；实现花型Ⅲ时前四位Q0Q1Q2Q3为右移环形计数器的规律，后四位Q4Q5Q6Q7为右移环形计数器的规律；实现花型Ⅳ时前四位Q0Q1Q2Q3为右移环形计数器的规律，后四位Q4Q5Q6Q7为左