In general, a Hot Swap controller provides two importantfunctions to boards that can be plugged and unpluggedfrom a live backplane:
上傳時(shí)間： 2013-10-23
上傳用戶(hù)：行者Xin
51印刷層
上傳時(shí)間： 2013-11-24
上傳用戶(hù)：thing20
這是HOT51的開(kāi)發(fā)板電路圖
標(biāo)簽： HOT 51 開(kāi)發(fā)板 電路圖
上傳時(shí)間： 2013-10-12
上傳用戶(hù)：ttpay
不解釋?zhuān)枰淖约合?/p>
上傳時(shí)間： 2013-12-29
上傳用戶(hù)：xiaoxiang
很好的東西
上傳時(shí)間： 2013-10-07
上傳用戶(hù)：miaochun888
呵呵。
標(biāo)簽： HOT 51 開(kāi)發(fā)板 使用說(shuō)明
上傳時(shí)間： 2013-10-31
上傳用戶(hù)：sy_jiadeyi
設(shè)計(jì)了一種基于PIC16C71單片機(jī)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(jiǎn)單分壓電路作為水溫測(cè)量電路，利用PIC16C71單片機(jī)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(jī)控制直流電機(jī)驅(qū)動(dòng)混水閥調(diào)節(jié)冷熱水的混合比例實(shí)現(xiàn)水溫調(diào)節(jié)。給出了控制電路圖，對(duì)水溫測(cè)量電路的參數(shù)選擇和測(cè)溫精度作了詳細(xì)討論。實(shí)驗(yàn)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(wèn)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(shí)間： 2013-11-08
上傳用戶(hù)：Yue Zhong
電子發(fā)燒友網(wǎng)訊：想實(shí)時(shí)關(guān)注世界最hit最前沿技術(shù)科技動(dòng)態(tài)？想了解最有價(jià)值國(guó)外電子設(shè)計(jì)資訊？想最先了解行業(yè)工程師設(shè)計(jì)的最hot參考案例？請(qǐng)關(guān)注電子發(fā)燒友網(wǎng)推薦欄目——國(guó)外電子，基于此，為電子發(fā)燒友網(wǎng)讀者奉上國(guó)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(guó)外電子精華集錦（4月）》，以饗讀者。內(nèi)容精彩，不容錯(cuò)過(guò)，請(qǐng)繼續(xù)關(guān)注電子發(fā)燒友網(wǎng)后續(xù)系列報(bào)道。 1、美國(guó)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(guó)聯(lián)邦調(diào)查局FBI用的汽車(chē)追蹤設(shè)備？如果你會(huì)很奇怪，這么機(jī)密的東西到底從來(lái)弄來(lái)的呢？其實(shí)，這是一位叫Karen Thaomas的女士無(wú)意間從她的汽車(chē)底下發(fā)現(xiàn)的。 該追蹤設(shè)備包括了用于追蹤汽車(chē)定位的GPS單元，一個(gè)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(dòng)支持。我們不會(huì)光為了了解這些而忽略了視覺(jué)的享受吧？！現(xiàn)在就為你揭開(kāi)FBI汽車(chē)追蹤儀器的神秘面紗！ 上圖中，順時(shí)針?lè)较蛞来螢殡姵亟M、GPS天線、發(fā)射/接收單元和磁力安裝支架
標(biāo)簽： 電子 發(fā)燒友 國(guó)外電子 集錦
上傳時(shí)間： 2013-10-28
上傳用戶(hù)：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(biāo)簽： Synplicity Machine Verilog Design
上傳時(shí)間： 2013-10-20
上傳用戶(hù)：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.
標(biāo)簽： ability reports The to
上傳時(shí)間： 2014-01-14
上傳用戶(hù)：franktu
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