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在电子技术中，频率是最基本的参数之一，又与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测...
在电子技术中，频率是最基本的参数之一，又与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。在本次毕业设计中我们选择使用单片机来制作数字频率计，并在实际制作中采用了直接测频法。利用延时产生的时基门控信号来控制闸门，通过在单位时间内计数器记录下的脉冲个数计算出输入信号的频率，最终送入LCD中显示。这样制作出来的频率计不仅可以满足设计题目的参数要求，而且具有了单片机的稳定性和成熟性，且控制能力强，是一种低成本，高可靠的设计方案。-In electronic technology, the frequency is one of the most basic parameters, but also with a number of electrical parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measurement of the frequency of a number of means, electronic measurement of the frequency counter with high precision, easy to use, rapid measurement, and measurement is easy to realize the advantages of process automation is an important means of measuring the frequency of one. Graduates in this design we have chosen to make use of single-chip digital frequency meter, and used in the actual production of a direct
- 2022-04-18 19:56:54下载
- 积分：1
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ARM APPLICATION AND SYSTEM DEVELOPMENT ON S3C4510B (介绍的很详细,很适合入门)...
ARM APPLICATION AND SYSTEM DEVELOPMENT ON S3C4510B (介绍的很详细,很适合入门)-ARM APPLICATION AND SYSTEM DEVELOPMENT ON S3C4510B (described in great detail, it is suitable for entry)
- 2022-07-10 15:08:27下载
- 积分：1
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某学校网络教育平台方案，可扩展综合性教育平台网络系统。...
某学校网络教育平台方案，可扩展综合性教育平台网络系统。-Online education platform in a school program, scalable platform for comprehensive sex education network system.
- 2022-01-31 21:44:13下载
- 积分：1
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通过CRM系统分析、本公司需求分析及考察CRM的一般系统与实际业务流程关系，确定本公司CRM系统设计定位于基于部门应用、运营与分析并重。并在此系统设计目标定位下...
通过CRM系统分析、本公司需求分析及考察CRM的一般系统与实际业务流程关系，确定本公司CRM系统设计定位于基于部门应用、运营与分析并重。并在此系统设计目标定位下，确定系统流程，设计功能模块，并努力面向部门协作与数据挖掘。-Through the CRM system analysis, needs analysis the Company and the inspection of the general system CRM business processes and the actual relationship between the CRM system to determine the design of the Company located in sector-based applications, both operations and analysis. And targeting this system under design, the system processes, the design of function modules, and the efforts for collaboration and data mining sectors.
- 2022-01-27 10:55:21下载
- 积分：1
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With regard to PCI bridge chip design, a total of nine documents, a comprehensiv...
关于PCI桥芯片的设计，共9篇文档，全面介绍了各种系统中桥芯片的使用-With regard to PCI bridge chip design, a total of nine documents, a comprehensive introduction to a variety of systems in the use of bridge chips
- 2023-05-20 13:30:04下载
- 积分：1
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详细介绍了基于DirectShow和RTP的网络视频监视系统设计与实现。...
详细介绍了基于DirectShow和RTP的网络视频监视系统设计与实现。-Detailed information on DirectShow and RTP-based network video surveillance system design and implementation.
- 2022-11-05 22:05:06下载
- 积分：1
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Win2000 under the PCI image acquisition device driver design
Win2000下PCI图像采集设备驱动程序设计-Win2000 under the PCI image acquisition device driver design
- 2022-03-23 08:54:20下载
- 积分：1
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USB 1.1 协议详简，对做usb 开发的 可以好好看看。
USB 1.1 协议详简，对做usb 开发的 可以好好看看。
-USB 1.1 protocol detailed briefing on the development of the so usb be a good look.
- 2022-01-28 08:23:33下载
- 积分：1
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使用vb开发的课程设计，数据库的基本功能都实现了。
使用vb开发的课程设计，数据库的基本功能都实现了。-Vb development of the use of curriculum design, the basic functions of the database have been achieved.
- 2023-03-06 00:15:03下载
- 积分：1
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xilinx开发板相关资料,包括版图,数据手册
xilinx开发板相关资料,包括版图,数据手册-Xilinx development board-related information, including map, data manual
- 2022-08-12 09:19:37下载
- 积分：1
