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LED驱动器MAX7219的如此特别。MAX7219是微处理器和共阴极结构
MAX7219驱动LED特好使.MAX7219是微处理器和共阴极七段― ― 八位LED显示、图条／柱图显示或64点阵显示接口的小型串行输入／输出芯片。片内包括BCD译码器、多路扫描控制器、．字和位驱动器和8X 8静态RAM。外部只需要一个电阻设置所有LED 显示器字段电流。MAX7219和微处理器只需三根导线连接，每位显示数字有一个地址由微处理器写入。允许使用者选择每位是BCD 译码或不译码。使用者还可选择停机模式、数字亮度控制、从1～8选择扫描位数和对所有LED显示器的测试模式。-LED Driver MAX7219 so special. MAX7219 is a microprocessor and a total cathode seventh-- 8 LED display, map article/column or 64 shows a small dot-matrix display interface serial input/output chips. Chip including the BCD decoder, multiplex scan controller. Word and bit drive and 8X 8 static RAM. External resistor only need one set all LED displays current field. MAX7219 and the microprocessor only three wires to connect, each show has an address by the digital microprocessor write. Is to permit users to choose each BCD decoding or not decoding. Users can also choose to shutdown mode, the digital brightness control, 1 ~ 8 to choose from scanning the median and LED displays for all the test mode.
- 2022-08-03 09:28:27下载
- 积分：1
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Emdros is a text database middleware
Emdros is a text database middleware-layer aimed at storage and
retrieval of "text plus information about that text." This
information could be linguistic analyses or other annotations. Emdros
provides an abstraction of text that makes it well suited to storing
/syntactic analyses/ of text, but other linguistic information is
supported as well. Emdros comes with a query-language, MQL, that
enables powerful queries. Emdros acts as a middleware-layer between a
client (not provided) and a database back-end. Currently, PostgreSQL,
MySQL, and SQLite (2 and 3) are supported, but other back-ends can
easily be added.-Emdros is a text database middleware-layer aimed at storage and
retrieval of "text plus information about that text." This
information could be linguistic analyses or other annotations. Emdros
provides an abstraction of text that makes it well suited to storing
/syntactic analyses/ of text, but other linguistic information is
supported as well. Emdr
- 2023-07-09 16:25:04下载
- 积分：1
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主要介绍了等精度频率测量原理，该原理具有在整个测试频段内保持高精度频率
测量的优点 同时在该原理基础上，采用了Verilog HDL语言设计了高速的等精度测...
主要介绍了等精度频率测量原理，该原理具有在整个测试频段内保持高精度频率
测量的优点 同时在该原理基础上，采用了Verilog HDL语言设计了高速的等精度测频
模块，并且利用EDA开发平台QUARTUS11 3 .0对CPLD芯片进行写人，实现了计数等
主要逻辑功能 还使用C语言设计了该等精度频率计的主控程序以提高测量精度。本设
计实现了对频率变化范围较大的信号进行频率测量，能够满足高速度、高精度的测频要
求。-Introduced, such as the accuracy of frequency measurement principle, the principle has in the entire test frequency to maintain the advantages of high precision frequency measurement at the same time the basis of the principle of using the Verilog HDL language, such as the design of a high-speed precision frequency measurement module, and use of EDA Development platform QUARTUS11 3 .0 on CPLD chip to write, and achieved a count of the main logic function, such as the use of C language is also designed such precision the frequency of control procedures to enhance measurement accuracy. This design achieved a wide range of frequency changes in signal frequency measurement, to meet the high-speed, high precision frequency measurement requirements.
- 2023-08-06 16:05:04下载
- 积分：1
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Communication software communication software communication software
通讯软件 通讯软件-Communication software communication software communication software
- 2022-01-26 00:34:52下载
- 积分：1
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220KV substation voltage relay device microcomputer operating principle of the p...
220KV电压等级变电站微机操作继电器装置的二次回路原理程序-220KV substation voltage relay device microcomputer operating principle of the procedure secondary circuit
- 2022-05-15 23:49:18下载
- 积分：1
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用java开发终端平台上的Application程序， 比使用C++,Delphi等语言更加容易。 java语言似乎天生就适合团队开发。但是，摆在广大java开...
用java开发终端平台上的Application程序， 比使用C++,Delphi等语言更加容易。 java语言似乎天生就适合团队开发。但是，摆在广大java开发者面前的一个难题是，客户端必须安装JRE。真的必须安装JRE吗？其实你可以不装，只要使用Java Runner,无论在哪里，你的程序都可以Run起来。-spent on the terminal platform Application procedures, the use of C, Delphi and other languages easier. Java language seem naturally fit team development. However, the majority of java placed in front of the development of a problem is, the client must be installed JRE. Really must install the JRE? Actually, you can not, only use Java Runner, regardless of where your program can Run up.
- 2023-08-25 19:40:03下载
- 积分：1
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地理信息系统
这套系统是基于arcgis engine 和VB.net开发的，实现了GIS的基本界面和一些相关功能。包括图层管理、要素查询和选择等实用功能。
- 2023-07-09 22:30:04下载
- 积分：1
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利用socket
聊天软件（简单界面）
vc++开发的
利用socket
聊天软件（简单界面）
vc++开发的
-Use socket chat software (simple interface) vc++ Development
- 2023-07-16 23:55:04下载
- 积分：1
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OWEN和HINTON编制的二维结构非线性有限员原代码，这两个人可是英国斯往西大学的大牛，程序非常具有参考价值，希望搞非线性有限员飞吸的同学即使下载，肯定很有帮...
OWEN和HINTON编制的二维结构非线性有限员原代码，这两个人可是英国斯往西大学的大牛，程序非常具有参考价值，希望搞非线性有限员飞吸的同学即使下载，肯定很有帮助的了-OWEN HINTON preparation and structure of the two-dimensional nonlinear finite Members of the original code, but these two individuals British Andean University of Western cattle, procedures have great reference value, engage in limited flights on nonlinear absorption of the students even downloaded certainly a helpful
- 2022-11-29 18:05:03下载
- 积分：1
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动态连接库编程，可以将系统资源放在动态链接库中，实现对动态连接苦进行访问...
动态连接库编程，可以将系统资源放在动态链接库中，实现对动态连接苦进行访问-DLL programming, system resources can be placed on dynamic link library, and realize the hardships Dynamic Link visit
- 2023-07-07 23:55:02下载
- 积分：1
