新穎實(shí)用的單片機(jī)雙積分A/D轉(zhuǎn)換電路和軟件:摘 要: 通過對(duì)雙積分A/ D 轉(zhuǎn)換過程及其原理的分析,結(jié)合8031 單片機(jī)定時(shí)計(jì)數(shù)器的特點(diǎn),設(shè)計(jì)出一種新的A/ D 轉(zhuǎn)換電路. 詳細(xì)介紹了這種轉(zhuǎn)換電路的硬件原理及工作過程,給出了實(shí)用的硬件電路與軟件設(shè)計(jì)框圖. 通過比較分析,可以看出這種A/ D 轉(zhuǎn)換電路性能價(jià)格比較高,軟件編程簡(jiǎn)單,并且轉(zhuǎn)換速度和精度優(yōu)于一般的A/ D 轉(zhuǎn)換電路. 這種設(shè)計(jì)思路為數(shù)模轉(zhuǎn)換器(A/ D) 的升級(jí)提高指出一個(gè)明確的方向.關(guān)鍵詞:單片機(jī); 定時(shí)/ 計(jì)數(shù)器; A/ D 轉(zhuǎn)換; 雙積分
雙積分A/ D 及定時(shí)計(jì)數(shù)器原理:我們先分析雙積分A/ D 轉(zhuǎn)換的工作原理. 如圖1 所示,積分器先以固定時(shí)間T 對(duì)待測(cè)的輸入模擬電壓Vi 進(jìn)行正向積分,積分電容C 積累的電荷為
CSL is a programming language with C syntax and comprehensive libraries. The compact scripting engine can also be embedded into your own applications as a powerful macro language. Windows Distribution utilities.
sheerdns is a master DNS server whose zone records are stored on a One-Record-Per-File bases. Because of this, it is the simplest of any DNS to configure, the easiest to update, and the most efficient for networks that experience a lot of updates (for example master servers for dynamic IP address ranges). You never have to restart it; any updates are available immediately without having to notify the sheerdns process. 來源: http://freshmeat.net/projects/sheerdns/?topic_id=149 sheerdns是一個(gè)主DNS服務(wù)器，它的域記錄保存在一個(gè)One-Record-Per-File（每文件一個(gè)記錄）的庫中。因此，它是最簡(jiǎn)單的DNS配制，最容易更新，對(duì)于有大量更新的網(wǎng)絡(luò)（如動(dòng)態(tài)IP地址范圍的主服務(wù)器）來說它是最高效的。你不必重新啟動(dòng)它，任何更新不用通知對(duì)應(yīng)DNS進(jìn)程就可以立即生效。
This a wonderful reference on the In s and Out s of using Global JavaScript Variables within Brio Intelligence BQY s. 這是一個(gè)關(guān)于 Brio Intelligence BQY中使用全局 JavaScript 變量進(jìn)行輸入輸出的好參考
OpenVPN is a robust and highly flexible tunneling application that uses all of the encryption, authentication, and certification features of the OpenSSL library to securely tunnel IP networks over a single TCP/UDP port.
