基于lpc21系列的的电子时钟的程序设计，能实现电子时钟应实现的报时，校时等功能
Based on lpc21 series of electronic clock program design, can realize electronic clock should be realized when the hour, school, and other functions
(2011-04-18, Visual Basic, 1KB, 下载3次)
电子信息技术的发展越来越快，电子产品在人们日常生活中的应用越来越普及。时钟是我们日常生活中不可缺少的一部分，本设计主要使用硬件实现电子时钟的计时、校验等功能。本文主要对时钟电路的选择、功能、原理、装配调试和故障分析排除进行阐述。该电子时钟主要从以下六个方面进行设计：脉冲源、整形电路、分频器、计数器、译码器/驱动器和校时电路。
The development of electronic information technology faster and faster, electronic products in everyday life more and more popular. Clock is indispensable in our daily life as part of the main uses of the hardware design of electronic time clock, checking and other functions. In this paper, the choice of the clock circuit, function, principle, rule out the assembly debugging and failure analysis to elaborate. The electronic clock is mainly designed from the following six aspects: pulse source, shaping circuit, divider, counter, decoder/driver and timing circuits. (2011-04-07, C/C++, 341KB, 下载5次)
带校时和音乐报时功能时钟的设计与实现
介绍了I/O口输入与输出的应用，中断的应用，以及基于状态机思想的系统分析和系统设计
With the school musical chime clock time and the design and implementation introduces I/O port input and output ports, interrupt the applications, and ideas based on state machine system analysis and system design (2011-04-03, C/C++, 2KB, 下载4次)
clk： 标准时钟信号，本例中，其频率为4Hz；
clk_1k： 产生闹铃音、报时音的时钟信号，本例中其频率为1024Hz；
mode： 功能控制信号；为0：计时功能；
为1：闹钟功能；
为2：手动校时功能；
turn： 接按键，在手动校时功能时，选择是调整小时，还是分钟；
若长时间按住该键，还可使秒信号清零，用于精确调时；
change： 接按键，手动调整时，每按一次，计数器加1；
如果长按，则连续快速加1，用于快速调时和定时；
hour,min,sec ：此三信号分别输出并显示时、分、秒信号，
皆采用BCD码计数，分别驱动6个数码管显示时间；
alert： 输出到扬声器的信号，用于产生闹铃音和报时音；
闹铃音为持续20秒的急促的"嘀嘀嘀"音，若按住"change"键，
则可屏蔽该音；整点报时音为"嘀嘀嘀嘀-嘟"四短一长音；
LD_alert： 接发光二极管，指示是否设置了闹钟功能；
LD_hour： 接发光二极管，指示当前调整的是小时信号；
LD_min： 接发光二极管，指示当前调整的是分钟信号。
If long press, the continuous rapid plus 1 for quick adjustment and timing,
Hour-by-hour, min, SEC: this three signal output and display when respectively, minutes and seconds signal,
All USES BCD counter, respectively driven six digital pipe display time,
Where the signal to the speaker: output, used to produce make primitive and strike the sound,
Make businessis about for lasts 20 seconds the urgent "di di di" sound, if hold "information" key,
Then can shield the sound, Integral point to announce the sound as "di di di di- du" four short a drawl,
LD_alert: connect the light emitting diode, instruction set the alarm clock function whether
LD_hour: connect the light emitting diode, instructions, the current is to adjust the hour signal,
LD_min: connect the light emitting diode, instructions, the current is to adjust the minutes signal. (2011-03-04, Others, 2KB, 下载1次)
功能：【1】时钟显示（包括小时，分钟） 二十四/十二小时制模式转换；校时功能（应能手动校时）；整点报时。
【2】闹钟提示设定3组闹钟当设定时间到时，闹钟响铃，同时屏幕出现一组十进制两位的加减乘除运算，此时使用者可通过屏幕下方的一排按键进行输入，如结果正确则停止响铃。若出现使用者不理闹钟或结果一直无法正确的情况，那么闹钟将隔5分钟响一次，直到答对为止。通过计算可以在短时间内让使用者达到清醒状态，实现闹钟的目。
Function: 【1】 clock display (including the hours, minutes) round/twelve hours the system mode switching the campus functions (should be able to manual timing) whole point timekeeping. 【2】 3 groups set alarm, alarm clock when the set time, the alarm clock rings and the screen appeared a group of two decimal addition and subtraction, multiplication and division, this time users through a row of buttons below the screen for input, If the result is correct to stop ringing. If there has been a user can not ignore the alarm clock or the results of the correct situation, then the alarm will sound once every 5 minutes, until the correct date. By calculating the user in a short time to awake and realize the purpose alarm clock. (2011-03-01, Visual C++, 1439KB, 下载3次)
应用8031单片机控制的数字时钟上，在设计上采用硬件计数与软件计数相结合的方式，并且定时器T0采用了中断方式，优先级最高。然后通过开关的闭合与关断来控制闹钟的校时，整点报时等功能。
Application of 8031 controlled digital clock, counting in the design of hardware and software using a combination of counts and using the timer interrupt T0, the highest priority. Then closed through the switch to control the clock and off the school, the whole point of time and other functions. (2010-12-14, VHDL, 862KB, 下载1次)
数字钟的C程序，实现了闹钟、整点报时、校时、温度测量等功能！适用于初学者做参考示例！
Digital clock in the C program, to achieve the alarm, the whole point of time, school time, temperature and other functions! A reference sample for beginners! (2010-12-08, C++, 3KB, 下载5次)
这次毕业设计通过对它的学习、应用，以AT89C51芯片为核心，辅以必要的电路，设计了一个简易的电子时钟，是以单片机AT89C51为核心元件同时采用LED数码管显示器动态显示“时”，“分”，“秒”的现代计时装置。它由单片机作为数字钟的核心控制器，通过它的时钟信号进行实现计时功能，将其时间数据经单片机输出，利用显示器显示出来。通过键盘可以进行校时、定时等功能。输出设备显示器可以用液晶显示技术和数码管来显示技术。
模块化的设计和调试方法在整个课题研究过程中至关重要，事实上在任何设计中也同样关键和有效。
The graduation design based on the study and application, it is the core, with AT89C51 chips with the necessary circuit design, a simple electronic clock, based on single-chip AT89C51 as the core element using LED digital display dynamic display of the tube, "" points", "second" modern timing devices. It consists of single chip microcomputer as the core controller, digital clock through its clock signal timing function, will realize its time, using SCM outputs data display. Through the keyboard can be reset, timing etc. Function. Output devices with LCD monitors can technology and digital tube to display technology.
Modular design and debug method in the research process, in fact is crucial in any design is also the key and effective.
(2010-11-13, WORD, 410KB, 下载8次)
真正的ATT7022C软件校表c程序，系本人项目基于C8050F020单片机编写的代码，调试通过，现与大家分享
c ATT7022C software,based on C8050F020 microcontroller，debugged, and now share (2010-11-08, C/C++, 5KB, 下载392次)
①在6个不带锁存器的数码管上，实现时钟的动态显示；
②当时钟显示不准时，实现时钟的实时校时功能；
③实现在数码管上、电脑上同步显示实时时钟信号
① In the six non-digital pipe latches, dynamic display of the clock ② When the clock display are not allowed to achieve real-time clock when the function of the school ③ implemented in digital, the computer displays real-time clock synchronization (2010-11-01, Others, 8KB, 下载4次)
基于STC89C52实现DS18B20单总线，多路温度测量，本程序参加校电子竞赛获一等奖，附有详细注释，适合想提高单片机编程的学习者
very good (2010-09-16, C/C++, 1063KB, 下载79次)
51单片机 时钟 LED显示 可校时 有四个闹钟
It is a program for electronic clock in C language.show in led and there are four alarm in it. (2010-07-25, C/C++, 30KB, 下载11次)
LED点阵书写屏驱动程序，校赛程序，绝对原创！
LED dot matrix display driver writing, school event programs, definitely original! (2010-07-10, C/C++, 158KB, 下载99次)
介绍一种利用卫星接收机接收的时间信号, 经单片机接收处理后进行自动校时的
数显时钟的设计
Introduction of a satellite receiver to receive time signal processing by the MCU after receiving automatic error correction design digital display clock (2010-06-16, C/C++, 131KB, 下载17次)
设计一个采用数字电路实现,对时,分,秒.数字显示的计时装置,周期为24小时，显示满刻度为23时59分59秒，并具有校时功能和报时功能的数字电子钟。电路主要采用中规模集成电路.本系统的设计电路由脉冲逻辑电路模块、时钟脉冲模块、时钟译码显示电路模块、整电报时模块、校时模块等部分组成。采用电池作电源，采用低功耗的芯片及液晶显示器，发生器使用石英晶振、计数振荡器CD4060及双D触发器74LS74，计数器采用同步双十进制计数器74LS160，锁存译码器是74LS248，整电报时电路用74LS74，74LS32及扬声器构成。
Design a digital circuit, on the hours, minutes, seconds. Figures show that the timing device, 24-hour period, indicating full scale is 23:59:59 and the time with school functions and timekeeping functions of digital electronic clock. Scale integrated circuits used in the main circuit. The design of this system by the pulse logic circuit module, clock module, the clock display circuit decoding module, when the entire cable module, the campus module components. Using a battery powered, low-power chips and liquid crystal display generator using a quartz crystal oscillator, count of CD4060 oscillator and two D flip-flop 74LS74, two-decimal counter synchronous counter 74LS160, latch decoder is the 74LS248, the whole When telegraph circuits 74LS74, 74LS32 and loudspeaker (2010-06-13, Others, 439KB, 下载125次)
多功能电子钟：具有12小时与24小时制切换、倒计时功能和秒表功能。（可校时和可以设置倒计时、秒表的启停）
Multi-function clock: a 12-hour and 24 hour clock switch, countdown function and stopwatch functions. (Can correct time and set the countdown, start and stop of the stopwatch) (2010-06-08, Asm, 20KB, 下载7次)
摘要
电能表作为用电量的测量工具广泛的应用于各种场合。在电能表校表系统中,需要的最基本的输入信号源是高精度双路正弦信号源,并要求可对其频率、相位、幅值进行调节,来对电能表进行校准。
基于单片机的程控信号源设计，运用数字调相、数字调幅和数字调频等技术，要求实现相位、幅度、频率的高精度程控调节。本文设计了一种利用锁相环频率合成技术和数字波形合成技术组成的程控低频正弦波信号发生器，并给出了调幅、调频、调相的实用电路，频率调节通过改变8253计数器的分频系数来实现；相位调节由51单片机预置计数器的计数初值来完成，幅度的调整通过改变DAC1210II的参考电压来实现，使频率分辨率达0.01Hz,相位调节精度达0.1°，并介绍电路中的主要芯的功能及使用。输出正弦波频率和幅值的精度高，稳定性好，失真度低，电路简单、可靠、便于程控。
关键词：数字合成信号源；程控；调幅；调频；移相；
Abstract
Meter consumption as the size of the measurement tool is widely used in various occasions. In single-phase power meter verify system, the most basic needs of the input signal is the source of two-way high-precision sine signal source, and may request its frequency, phase, amplitude in a certain step to adjust to the imitate of the actual electricity load with a right meter calibration.
Design of the programmable signal supply controlled source，which based on the MCU，including digital phase adjustment，distal amplitude adjustment，digital frequency adjustment etc．The system should achieve high quality digital adjustment of phase, amplitude and frequency. This paper describes the use of a PLL frequency synthesizer technology, and digital wave form synthesis technology consisting of program-controlled low-frequency sine wave signal issued devices, and applies the amplitude， frequency， phase of practical circuit. Frequency can be adjusted through a change in the 8253 counter-frequ (2010-06-05, C/C++, 373KB, 下载32次)
摘要
温度测量仪表是工业生产中常用的一种测量装置。对于配用热电偶的二次测温仪表,传统的检定方法是采用逐盘转动电位差计进行平衡读数, 然后查热电偶分度表求出误差,检定过程比较复杂。为了简化检定操作,方便现场检定,我们设计了新型的适用于mV 型测温仪表的检定仪。该检定仪利用AT89C51单片机, 将各种常用热电偶分度表固化在检定仪的EPROM 中,将毫伏发生器、调节器、显示器等组成一体, 具有操作简便、读数准确、功能强、重量轻、体积小等优点, 操作人员不必再查找热电偶分度表。该检定仪设有电势正负转换开关, 为具有零位补偿的测温仪表的零位检定与修理提供了方便，通过不同的按键，该仪表可以选择不同的热电偶分度号，进行校零和进入不同的工作状态。所以该型检定仪是一种非常适宜于现场使用的仪器。
关键词：检定仪；单片机；热电偶；线性化
Abstract
The temperature meter is one of the commonly used measuring devices in the industrial production. The traditional calibration method for going with the thermocouple’s temperature meter is looking up the thermocouple indexing table to extract the error after a balance reading through the plate rotation potentiometer. Obviously, the process of calibrating is too complex. In order to simplify the operations of the calibration and make the scene calibration more convenient, we have designed a new calibrator which is suitable for the mV temperature meter’s calibration. Such calibrator uses a AT89C51 single-chip computer to solidify each kind of commonly used thermocouple indexing table in the calibrator s EPROM, then the millivolt generator, the regulator, the monitor and so on will compose a body, which has the advantage of simple operation, accurate reading, strong function, light weight, small volume and so on. And the operators do not need to look up the thermocouple indexing (2010-06-05, C/C++, 218KB, 下载32次)
本程序对初学者非常好的1602校时数字时钟
School for beginners in 1602 when the digital clock (2010-05-24, C/C++, 16KB, 下载23次)
数字钟的设计 实现 秒表 校时 闹钟 定时 发出声响 等功能
Design and implementation of digital clock stopwatch timer audible alarm when the school functions (2010-05-21, Visual Basic, 484KB, 下载5次)