数字频率计作为一种常见的应用电子仪器设备，传统的一般可以完全由硬件电路搭接而成，如采用基于555 定时器电路的多功能数字频率计的设计便是可取的路径之一，不用依靠单片机。但是这种电路存在一些缺点，且测频精度也不如单片机的高。在科学研究和生产实践中，如工业过程控制，生物医学，地震模拟机械振动等领域常常要用到频率计。利用单片机采用程序设计方法来设计频率计，其测频精度高。且线路相对简单，结构紧凑，价格低廉，系统稳定度高，抗干扰能力强，用途广泛等优点
Digital frequency meter is a common application of electronic devices, the traditional general can completely by hardware circuit lap, such as the use of 555 timer circuit based multifunctional digital frequency meter design is the one of the desirable paths without by MCU. But this circuit has some shortcomings, and the accuracy of frequency measurement as well as the MCU high. In the scientific research and production practice, such as industrial process control, biomedicine, seismic modelingmechanical vibration and other fields often use frequency meter. The use of single-chip microcomputer to design frequency meter program design method is adopted, the frequency measurement precision. And the lines are relatively simple, compact structure, low cost, high stability, strong anti-interference ability, wide range of uses, etc. (2016-04-09, Visual Basic, 3534KB, 下载6次)
V/F变换和F/V变换采用集成块LM331，LM331是美国NS公司生产的性能价格比较高的集成芯片，可用作精密频率电压转换器用。LM331采用了新的温度补偿能隙基准电路，在整个工作温度范围内和低到4.0V电源电压下都有极高的精度。同时它动态范围宽，可达100dB；线性度好，最大非线性失真小于0.01％，工作频率低到0.1Hz时尚有较好的线性；变换精度高，数字分辨率可达12位；外接电路简单，只需接入几个外部元件就可方便构成V/F或F/V等变换电路，并且容易保证转换精度
V/F conversion and F/V conversion using Manifold LM331, LM331 NS produced in the United States high performance and low cost integrated chip, can be used as precision frequency voltage converter uses. LM331 with a new temperature compensated bandgap reference circuit, the entire operating temperature range and low to 4.0V supply voltage has a very high accuracy. Also it wide dynamic range up to 100dB linearity, maximum nonlinear distortion is less than 0.01 , the operating frequency low to 0.1Hz good linear fashion conversion of high precision, digital resolution up to 12 external circuit is simple , just a few external components to facilitate access to constitute V/F or F/V conversion circuit, etc., and is easy to maintain the conversion accuracy (2013-10-04, Visual Basic, 28KB, 下载20次)
提供1024位的连环AT24C01电可擦可编程
只读存储器(eepm)组织成128字的8位每个。该设备是
优化用于在许多工业和商业应用,低功率
和低电压操作是必要的。可以在空间的AT24C01储蓄
8针PDIP,8针MSOP,8针TSSOP,8针JEDEC小块集成电路包和是
可通过2线串行接口。此外,整个家庭可在5.0 v
(4.5 v至5.5 v),2.7 v(2.7 v至5.5 v),2.5 v(2.5 v至5.5 v)和1.8 v(1.8 v至5.5 v)版本-
的联系。
1024 provided a chain AT24C01 electrically erasable programmable read-only memory (eepm) organized into 128 words 8 each. The device is optimized for use in many industrial and commercial applications, low power and low voltage operation is necessary. AT24C01 savings in space, 8-pin PDIP, 8-pin MSOP, 8-pin TSSOP, 8-pin JEDEC soic package and is available through a 2-wire serial interface. In addition, the entire family is available in 5.0 v (4.5 v to 5.5 v), 2.7 v (2.7 v to 5.5 v), 2.5 v (2.5 v to 5.5 v) and 1.8 v (1.8 v to 5.5 v) version- linked. (2013-06-26, Visual Basic, 1714KB, 下载1次)
Ds1302 实现
1) 显示分、秒、月、日、年；
2) 可自由调整分、秒、月、日、年；
3) 分秒作一页显示，月日作一页显示，年作一页显示；
4) 上电后，时钟运行，显示设置的初始分秒值并开始正常运行，此情况下，按K3，则显示月日，松手则跳回分秒显示；按K4，则显示年，松手则跳回分秒。K1为设置键，按一次进入年的设置，2次进入月的设置，3次进入日的设置，4次进入月的设置，5次进入日的设置，6次回到年的设置。在设置环境下，K3和K4充当+/-键，在设置环境下，每次切换设置项，都会将当前设置的值实时存入寄存器，即切换设置项时自动保存调整后的值。K2为确认键，用于从设置环境退出，回到分秒显示。
Ds1302 achieve 1) show minutes, seconds, month, day, year 2) can be freely adjusted points, second, month, day, year 3) every minute for a month for a show, and years as a display 4) electric clock running, set the initial minutes and seconds and begin normal operation, in this case, press K3, Month Day, let go then jump back to the minutes and seconds K4, display years let go then jump back to the minutes and seconds. K1 to set key, press once to enter the year is set, 2 times a month set, three times to enter the date set, four times to enter the month setting, five times to enter the date set, return to the setting of the year six times. Set the environment, K3 and K4 act as+ /- keys to set the environment, each switch setting item, the current set of values stored in the registers in real time, that is, after the switch setting items saved automatically adjusted value. Enter key, K2 is used to set the environment to exit back to the minutes and seconds display. (2013-04-06, Visual Basic, 3KB, 下载2次)
用于公司、工厂、商店、学校报时铃声、播放音乐，也可作为欣赏音乐的播放器使用。
自动识别RM、RAM、MP3、WMA、VCD、DAT、MID、WAV等三十多种媒体音乐格式。
窗口三种播放形式：循环播（当前音乐）、次序播（播放列表中的音乐文件，逐次播放）、定时播（默认状态）。
安装方法：直接运行安装文件夹中的SETUP.exe文件，即可完成。
运行后，以图标形式驻留在windows系统任务栏中，在图标上单击鼠标右键，
还原窗口，进行设置或状态查看。
操作方法：
1、选择电脑中的音乐文件存放路径，单击“编辑设置”按钮，在文件列表框中选中“音乐文件名”
即可试听，点击“增加音乐”文件，即可填入播放文件列表中。点击“替换音乐”，即可替换当前行号
对应项。
2、逐次填加、自动计算播放分钟、秒数。设置播放时间后，单击“确认保存”按钮，保存播放列表。
3、选择您喜欢的播放形式（循环、次序、定时），欣赏音乐。
祝愿支持和关心软件开发事业的朋友
For companies, factories, shops, schools and timekeeping ring tones, play music, can also be used as listening to music player.
Automatic identification of 30 RM, RAM, MP3, WMA, VCD, DAT, MID, WAV and other multi-media music format.
Window three player in the form: Circular broadcast (music), music files in the order broadcast (in the playlist, and successive play), broadcast from time to time (the default).
Installation methods: direct run SETUP installation folder? Exe file, to complete.
Running, an icon that resides in the windows system tray, right-click on the icon.
Restore window settings or status view.
Methods of operation:
1, select the music files in the computer storage path, click "Edit Settings" button, select the music file name in the file list box. "
To listen, click on "Add music files, you can fill in to play the file list. Click on the "replace the music, you can replace the current line number
The corresponding items.
Two succes (2012-07-21, Visual Basic, 27667KB, 下载12次)
AVR 单片机是目前最新的单片机系列之一, 它以高速度、大驱动能力和丰富的硬件资源而著
称于微控制器系列。本书前两章系统深入地讲解了AVR 单片机系列的硬件组成、运作原理及其
指令集。在此基础上, 第三、四两章进一步例示了AVR 汇编语言程序设计技巧及片内各部件的用
法。最后两章告诉读者如何构成单片机应用系统及进行软硬件开发。
本书取材先进, 叙述条理清晰, 语言通畅, 例题丰富, 可读性强。以高等院校有关专业师生及
从事微机控制方面工作的广大科技人员为读者对象。
AVR single-chip microcontroller are the latest in a series of its large high speed, driving ability and rich hardware resources and the
Say in micro controller series. This book the first two chapters thoroughly and systematically explains AVR microcontroller series of hardware composition, operation principle and its
Instruction set. On this basis, the article and typical chapter further exemplify the AVR assembler programming skills and piece inside of all parts of use
Method. The last two chapters tells readers how to constitute a microcomputer application system and hardware and software development.
This book materials, advanced, narrative clear language unobstructed, sample is rich, readable. In higher colleges relevant professional teachers and students
Engaged in the microcomputer control aspect of work broad scientific and technological personnel targeted readers.
(2011-03-04, Visual Basic, 9089KB, 下载4次)
包含有七段LED，点阵LED两种数字显示OCX控件源码。
用户也可以根据自己的需要，显示其它字符，如点阵中显示字母。
点阵字母显示字串如果不好确定，可用VC++中的ICON资源编辑器来确定。
七段曾参考别人的程序，在此表示感谢，点阵为自己编制。
本控件最好的用处是工业控制中的实时数据显示。
一定有不妥之处，希望大家不吝指教。
contained in paragraph 107 of LED, LED dot matrix two figures OCX Controls source. Users can also have their own needs, showing other characters, such as dot-matrix alphanumeric display. Dot-matrix alphanumeric strings if not show identification, the VC available ICON resources to determine the editor. Others have made reference to paragraph 107 of the procedures, expressed his thanks for their preparation lattice. The best control is the use of industrial control of real-time data. Certainly nothing wrong with it and hope we Help us improve. (2006-11-18, Visual Basic, 20KB, 下载174次)