简易电子闹钟的设计报告

编号：基础工程设计说明书题目：LED强度可调驱动电路设计院（系）：电子工程与自动化学院专业：光电信息科学与工程学生姓名：李朝庭学号：1300820112指导教师：彭智勇职称：高级实验师2017年1月1日桂林电子科技大学基础工程设计说明书摘要目前，LED灯的亮度可调通过有两种可行方案：第一种是通过占空比电压来输出不同的电压，从而实现亮度可调；第二种通过控制数模转换器来输出不同的电流，然后经过放大器来进行发大，从而实现输出不同的电压，来实现亮度可调。对于第一种方案，优点是设计简单，且使用的电子器件类较少，造价成本低，其集成度低，电路原理不复杂，适于现代社会发展的需求。对于第二种方案，它设计图复杂，其集成度不高，且使用了数模转换器，因此和第一种设计方案相比略高。所以本设计采用了第一种方案。本设计的结果是设计制作一种路LED光强独立可调的led调光电路；自动调光时可使等在熄灭、微亮、较量及最亮四种状态中不断循环；实现灯光的循环调节功能(循环时间分别为为2s、4s、6s、8s、10s、12s)；关键词：LED；色温；RGB；驱动；调光桂林电子科技大学基础工程设计说明书AbstractAttheendoftwentiethCentury,theelectronictechnologyhasdevelopedrapidly.Inthepromotion,themodernelectronicproductshavepenetratedalmostallareasofthesociety.Ithasgreatlypromotedthedevelopmentofsocialproductiveforcesandtheimprovementofsocialinformation.Timeisalwayssovaluabletopeople,theworkofthebusyandcomplicatedandeasytomakepeopleforgetthecurrenttime.Forgettodo,whenitisnotveryimportant,thisnothurttheimportantessentials.Simpleelectronicalarmclockisausedtoafteracertainperiodoftimethroughthealarmsoundsandwakesuptheuserasimpleelectroniccircuitandisusedtopreventnapsleepoverdotheinstrumentfromtimetotimetowakeuptheuser'srole.Thissystemmainlyconsistsof555timersquarewavesignalgeneratorandtheinputcontrolthroughthekeyinputcontrolofthetwobitcountertimingcircuitcanbeinputtotheinputofatimeoftheelectronicclock,simulationandtimeintervalcanbewithin99secondsofcontinuousadjustable.Keywords:timingcircuit;555timer;multiharmonicoscillator;timeclock桂林电子科技大学基础工程设计说明书目录引言.................................................................................................................................................................11设计任务...................................................................................................................................................21.1设计题目..........................................................................................................................................21.2设计要求..........................................................................................................................................22系统的组成...............................................................................................................................................32.1系统的组成总体框图......................................................................................................................32.2各部分系统的功能..........................................................................................................................32.3方案可行性分析与仿真调试..........................................................................................................32.3.1时钟信号发生系统................................................................................................................32.3.2按键输入系统........................................................................................................................52.3.3倒计时与响铃系统...............................................................................................................62.3.4各系统的衔接与总原理图....................................................................................................93硬件设计.................................................................................................................................................103.1元器件选择的依据以及元件参数的确定....................................................................................103.2PCB原理图与电路图布线设计.................................................................................................103.3硬件制作.........................................................................................................................................114系统调试...............................................................................................................................................124.1信号发生器的调试........................................................................................................................124.2计数器以及数码管显示的调试....................................................................................................124.3响铃系统调试................................................................................................................................124.4按键输入电路的调试....................................................................................................................125结论.........................................................................................................................................................14谢辞...........................................................................................................................................................16参考文献.......................................................................................................................................................17附录一元件清单.........................................................................................................................................18附录二电路总原理图......................................................................................