基于51单片机电子闹钟仿真设计。Proteus仿真文件及Keil C程序文件,具有闹钟、校时、校分和温度检测等功能。
Based on 51 single-chip electronic alarm clock simulation design.Proteus simulation file and Keil C program file, with the alarm clock, school, school points and temperature detection function. (2012-03-19, C/C++, 62KB, 下载55次)
ATT7022b correction table 校表程序源码，C语言编程
ATT7022b correction table (2012-03-13, C/C++, 5KB, 下载19次)
用51单片机做的多功能电子钟，有时间、日历、温度显示，4*4键盘校时，闹钟功能
Microcontroller to do with the 51 multi-function digital clock, time, calendar, temperature display, 4* 4 keyboard school, alarm clock function (2011-09-24, C/C++, 3103KB, 下载22次)
msp430控制GPS模块lea-5s完成校时
通过lea-5s进行每2小时发送一次时间信息校时
msp430 control GPS module lea-5s to complete school through the lea-5s for every 2 hours when the school sends a time information (2011-07-31, C/C++, 32KB, 下载9次)
校电赛选拔程序，利用8051单片机的计数器功能，采集交流信号的下降沿，设计计数器，并在1602上显示，精确位数至4位。
Electric race school selection process, using 8051 counter function, the falling edge of AC signal acquisition, design counter, and 1602 on display, accurate to four digits. (2011-07-26, C/C++, 2KB, 下载6次)
(1) 显示准确的北京时间（时、分、秒），可用24小时制式；
(2) 随时可以调校时间。
(3) 增加公历日期显示功能（年、月、日），年号只显示最后两位；
(4) 随时可以调校年、月、日；
(5) 允许通过转换功能键转换显示时间或日期。
(1) shows the exact Beijing (hours, minutes, seconds), available 24 hours format (2) can be adjusted at any time. (3) increasing the Gregorian calendar display function (year, month, day), era show only the last two (4) can always adjust the year, month, day (5) allows the conversion through the conversion function keys display the time or date . (2011-05-15, C/C++, 4KB, 下载8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)
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)
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)
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)
DUT系列数据采集模块将温度传感器（热电阻，热电偶等）的输出信号或电流、电压直接转换成数字量，通过RS-485总线及标准通信协议将数据传送给主机。在模块上由89C51单片机管理模块自动工作，通道转换、ADC启动、采集数据、参比端补偿（热电偶）、引线电阻补偿（热电阻）、数字校零、非线性校正和数据处理等，均由单片机完成，主机仅在需要数据时，发送读取数据命令，模块给出已经线性化了的温度的数字量。通讯协议兼容台湾研华ADAM4000系列和松下PLC的通讯协议，可以与大多数组态软件直接连接，不需要额外的驱动程序，技术人员不需要有温度检测专门知识和编程能力即可使用。本产品主要用于各种现场的数据采集和控制系统。
DUT Series data acquisition module temperature sensor (RTD, thermocouples) De Shuchuxinhao or the current, voltage directly into Shuzi amount, via RS-485 bus, and data transfer standard communication agreement Ji Zhu Ji. 89C51 microcontroller in the module by the management module automatically, channel conversion, ADC start, collecting data, reference junction compensation (TC), lead resistance compensation (thermal resistance), digital calibration, linear calibration and data processing by the MCU to complete, the host only needs the data to send read data command, the module has been given a linear temperature of the digital. Communication protocol compatible with Advantech ADAM4000 series and the Panasonic PLC s communication protocol, can be directly connected with most of the configuration software, no additional drivers, technicians do not have temperature sensing capabilities and programming expertise to use. This product is mainly used for a variety of field data acquisition a (2010-05-10, C/C++, 3463KB, 下载106次)
基于89c51的电子时钟设计，可对时，分，秒分别进行校时，复位等功能。
89c51 based design of electronic clock, may hours, minutes, seconds, school respectively, the reset function. (2010-05-09, C/C++, 1KB, 下载4次)
一个单片机全面检测软件，硬件为无忧开发网里面的ELITE_III
A microcontroller-round detection software (2010-03-27, C/C++, 113KB, 下载4次)
本项目设计采用了6位数码管显示电路，在设计6位LED显示时，为了简化电路，降低成本，采用动态显示的方式，6个LED显示器共用一个8位的I/O，6位LED数码管的位选线分别由相应的P2.0--P2.5控制，而将其相应的段选线并联在一起，由一个8位的I/O口控制，即P0。译码显示电路将“时”，“分”，“秒”计数器的输出状态经显示译码器译码，通过6位LED七段显示器显示出来。达到定时电路时根据计时系统的输出状态产生的一个脉冲信号，然后去触发蜂鸣器发生器来实现闹铃。校时电路是用来对“时”，“分”，“秒”显示数字进行校对调整的。压缩文件中的仿真文件可以用Proteus查看。
The project was designed with six digital tube display circuit, in the design of six LED display, in order to simplify the circuit, reduce costs, dynamic display mode, 6 LED displays share one 8-bit I/O, 6 Wei LED Digital Choice of line pipe by the corresponding P2.0- P2.5 control, whereas the corresponding segment of its alignment parallel together by an 8-bit I/O port control, that is, P0. Decode display circuit will be "time", "sub", "seconds" counter output state by the display decoder decoding, through the six LED seven-segment display is displayed. To achieve timing circuit timing system according to the output of the state generated by a pulse signal, and then to trigger generator to achieve the alarm buzzer. The school when the circuit is used to "time", "sub", "seconds" display figures proofreading adjusted. Compressed file in the simulation files can be used Proteus view (2010-03-08, C/C++, 21KB, 下载12次)