呵呵。
上傳時間： 2013-10-31
上傳用戶：sy_jiadeyi
設計了一種基于PIC16C71單片機的數字水溫配制閥。該配制閥采用NTC熱敏電阻作溫度傳感器，與固定電阻組成簡單分壓電路作為水溫測量電路，利用PIC16C71單片機內置的8位A/D轉換器把熱敏電阻上的模擬電壓轉換為數字量，PIC16C71單片機控制直流電機驅動混水閥調節冷熱水的混合比例實現水溫調節。給出了控制電路圖，對水溫測量電路的參數選擇和測溫精度作了詳細討論。實驗和分析表明，選用阻值較大的NTC熱敏電阻和分壓電阻可較好地解決熱敏電阻因功耗較大造成的熱擊穿問題。 Abstract: A digital valve for controlling water temperature based on PIC16C71 was presented in this paper.A bleeder circuit which consisted of a NTC thermistor as temperature sensor and a fixed resistance was designed as water temperature measuring circuit.The analog voltage on the thermistor was converted into digital signal by a 8-bit A/D converter embedded in PIC16C71. Based on the digital signal， the MCU PIC16C71 drived the valve by a DC motor to adjust the water temperature through adjusting the proportion of hot water and cold water.The circuit diagram of controller was given，the principle，the component parameters and the accuracy of measuring temperatures were also dissertated in detail. It was found by experiment and analysis that thermal breakdown of thermistor caused by high power could be solved by selecting thermistor and fixed resistance with high impedance value.
上傳時間： 2013-11-08
上傳用戶：Yue Zhong
The PL2303 USB to Serial adapter is your smart and convenient accessory forconnecting RS-232 serial devices to your USB-equipped Windows host computer. Itprovides a bridge connection with a standard DB 9-pin male serial port connector inone end and a standard Type-A USB plug connector on the other end. You simplyattach the serial device onto the serial port of the cable and plug the USB connectorinto your PC USB port. It allows a simple and easy way of adding serial connectionsto your PC without having to go thru inserting a serial card and traditional portconfiguration.This USB to Serial adapter is ideal for connecting modems, cellular phones, PDAs,digital cameras, card readers and other serial devices to your computer. It providesserial connections up to 1Mbps of data transfer rate. And since USB does not requireany IRQ resource, more devices can be attached to the system without the previoushassles of device and resource conflicts.Finally, the PL-2303 USB to Serial adapter is a fully USB Specification compliantdevice and therefore supports advanced power management such as suspend andresume operations as well as remote wakeup. The PL-2303 USB Serial cable adapteris designed to work on all Windows operating systems.
上傳時間： 2013-11-01
上傳用戶：ghostparker
電子發燒友網訊：想實時關注世界最hit最前沿技術科技動態？想了解最有價值國外電子設計資訊？想最先了解行業工程師設計的最hot參考案例？請關注電子發燒友網推薦欄目——國外電子，基于此，為電子發燒友網讀者奉上國外前沿技術大餐，電子發燒友網特整合推出《最受歡迎電子發燒友網國外電子精華集錦（4月）》，以饗讀者。內容精彩，不容錯過，請繼續關注電子發燒友網后續系列報道。 1、美國FBI秘密跟蹤器拆解：震撼的內部結構 這次要拆解的居然是美國聯邦調查局FBI用的汽車追蹤設備？如果你會很奇怪，這么機密的東西到底從來弄來的呢？其實，這是一位叫Karen Thaomas的女士無意間從她的汽車底下發現的。 該追蹤設備包括了用于追蹤汽車定位的GPS單元，一個RF發射器，主要用于將其位置發送到FBI，還有一組電池，用于設備電源驅動支持。我們不會光為了了解這些而忽略了視覺的享受吧？！現在就為你揭開FBI汽車追蹤儀器的神秘面紗！ 上圖中，順時針方向依次為電池組、GPS天線、發射/接收單元和磁力安裝支架
上傳時間： 2013-10-28
上傳用戶：狗日的日子
Abstract: This article explains the recent trend in heart-rate and fitness monitors to go wireless toeliminate cables to allow free movement, and allow convenient data collection without the need to plug intheir devices. It details a typical wireless system, using the MAX1472 crystal-referenced phase-lockedloop (PLL) VHF/UHF transmitter.
標簽： Heart-RateFitness Monitors Wireless Go
上傳時間： 2013-11-11
上傳用戶：xiaowei314
One of the strengths of Synplify is the Finite State Machine compiler. This is a powerfulfeature that not only has the ability to automatically detect state machines in the sourcecode, and implement them with either sequential, gray, or one-hot encoding. But alsoperform a reachability analysis to determine all the states that could possibly bereached, and optimize away all states and transition logic that can not be reached.Thus, producing a highly optimal final implementation of the state machine.
標簽： Synplicity Machine Verilog Design
上傳時間： 2013-10-20
上傳用戶：蒼山觀海
The ability to create groups of reports, and grant users access to reports by group. The ability to generate reports as PDF, XLS, HTML, and CSV files. The ability to generate bar, pie and xy charts for inclusion in reports. The ability to schedule and email PDF, XLS, and CSV reports. The ability to define reusable report parameters. Available parameter types include Date, Text, and Query Parameters. The ability to create multiple DataSources for use in generating reports. Support for JNDI DataSources and internal connection pooling via Commons-DBCP is included. The ability to upload and hot deploy new reports. Web based administration of users, groups, reports, parameters, and datasources. Cross platform database support via Hibernate based persistence layer. Available in a preconfigured bundle with Apache Tomcat.
上傳時間： 2014-01-14
上傳用戶：franktu
Addfilter is a command-line application which adds and removes filter drivers for a given drive or volume. It is intended to demonstrate how to insert a filter driver into the driver stack of a device. The sample illustrates how to do this by using the SetupDi APIs. The sample works on both x86 and Alpha platforms. It has only been tested in a 32-bit environment. Since Addfilter is not a driver, it does not deal with Plug and Play or Power Management.
標簽： command-line application Addfilter drivers
上傳時間： 2013-12-30
上傳用戶：天誠24
The CD Audio sample allows some non-SCSI2 CD ROMs to support audio operations by intercepting the relevant audio ioctls and translating them into the command block(s) expected by the non-compliant cdroms. It supports Plug and Play and Power Management, and is 64-bit compliant.
標簽： intercepting operations non-SCSI support
上傳時間： 2014-01-03
上傳用戶：ls530720646
是對upnp的介紹，UPnP即Universal Plug and Play通用即插即用簡稱UPNP。UPnP使用標準的TCP/IP和網絡協議，使它能夠無縫的融入現有網絡。是intel、力推的
標簽： upnp
上傳時間： 2013-12-24
上傳用戶：源碼3
