In general, a Hot Swap controller provides two importantfunctions to boards that can be plugged and unpluggedfrom a live backplane:
上傳時間： 2013-10-23
上傳用戶：行者Xin
51印刷層
上傳時間： 2013-11-24
上傳用戶：thing20
這是HOT51的開發(fā)板電路圖
上傳時間： 2013-10-12
上傳用戶：ttpay
不解釋，需要的自己下
上傳時間： 2013-12-29
上傳用戶：xiaoxiang
很好的東西
上傳時間： 2013-10-07
上傳用戶：miaochun888
呵呵。
上傳時間： 2013-10-31
上傳用戶：sy_jiadeyi
設(shè)計了一種基于PIC16C71單片機的數(shù)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(nèi)置的8位A/D轉(zhuǎn)換器把熱敏電阻上的模擬電壓轉(zhuǎn)換為數(shù)字量，PIC16C71單片機控制直流電機驅(qū)動混水閥調(diào)節(jié)冷熱水的混合比例實現(xiàn)水溫調(diào)節(jié)。給出了控制電路圖，對水溫測量電路的參數(shù)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
電子發(fā)燒友網(wǎng)訊：想實時關(guān)注世界最hit最前沿技術(shù)科技動態(tài)？想了解最有價值國外電子設(shè)計資訊？想最先了解行業(yè)工程師設(shè)計的最hot參考案例？請關(guān)注電子發(fā)燒友網(wǎng)推薦欄目——國外電子，基于此，為電子發(fā)燒友網(wǎng)讀者奉上國外前沿技術(shù)大餐，電子發(fā)燒友網(wǎng)特整合推出《最受歡迎電子發(fā)燒友網(wǎng)國外電子精華集錦（4月）》，以饗讀者。內(nèi)容精彩，不容錯過，請繼續(xù)關(guān)注電子發(fā)燒友網(wǎng)后續(xù)系列報道。 1、美國FBI秘密跟蹤器拆解：震撼的內(nèi)部結(jié)構(gòu) 這次要拆解的居然是美國聯(lián)邦調(diào)查局FBI用的汽車追蹤設(shè)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(fā)現(xiàn)的。 該追蹤設(shè)備包括了用于追蹤汽車定位的GPS單元，一個RF發(fā)射器，主要用于將其位置發(fā)送到FBI，還有一組電池，用于設(shè)備電源驅(qū)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(xiàn)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(fā)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
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
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