【正文】 直接送單片機(jī)處理，而濕度和光敏傳感器采集的信號(hào)經(jīng)過(guò) TLC2543A/D 轉(zhuǎn)換器轉(zhuǎn)換后送單片機(jī)。 測(cè)試結(jié)果 本設(shè)計(jì)能實(shí) 現(xiàn)對(duì)環(huán)境溫度、濕度、光線的實(shí)時(shí)檢測(cè)；并正確將所測(cè)結(jié)果通過(guò)矩陣鍵盤的控制顯示于 1602 顯示屏中。了解單片計(jì)技術(shù)的應(yīng)用 。當(dāng)然，這些都離不開老師們平時(shí)的教誨和前期的指導(dǎo)。此時(shí)此刻感慨萬(wàn)千，感謝指導(dǎo)教師 王老師 在這半年的畢業(yè)設(shè)計(jì)中對(duì)我的幫助和支持。 我相信以后的職業(yè)生涯，我會(huì)用嚴(yán)謹(jǐn)?shù)膽B(tài)度對(duì)待每一次挑戰(zhàn)，通過(guò)自己的努力實(shí)現(xiàn)自身的價(jià)值 。t charge you more than 35% of your pensation if you win the case. If you are thinking about signing up for a damagesbased agreement, you should make sure you39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport. For me it39。s actions. CSKA said they were surprised and disappointed by Toure39?？傆X(jué)得自己自己似乎應(yīng)該去做點(diǎn)什么，或者寫點(diǎn)什么。t really grow up, it seems is not so important。 Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time. 原來(lái)，這個(gè)世界上，對(duì)某個(gè)事件能產(chǎn)生化學(xué)反應(yīng)的，除了非做不可的堅(jiān)決，還有，時(shí)間。也曾經(jīng)好像已經(jīng)下定了決心去做某件事，但更多的時(shí)候是最后又打起了退堂鼓。 Those were broken into various shapes of stationery。突然想到那件藍(lán)格子襯衫；那些被折成各種各樣形 狀的信紙；那段從街角深巷伊始的友誼；還有那場(chǎng)還沒(méi)有開始就宣告了終結(jié)的邂逅計(jì)劃 …… 那些年那些天的非做不可，終于和青春一樣，都將在我們的人生中謝幕。t. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters). cause there 第 21 頁(yè) 共 21 頁(yè) 。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。 Have declared the end of the encounter that haven39。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強(qiáng)心劑，或者說(shuō)，是自以為是的精神寄托罷了。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個(gè)人的時(shí)候，自己的想法總是特別地清晰。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經(jīng)到了尾聲。s 21 win. Michel Platini, president of European football39。s antiracism taskforce, is in London for the Football Association39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。通過(guò)這次畢業(yè)設(shè)計(jì)，使我得到了一次用專業(yè)知識(shí)、專業(yè)技能分析和解決問(wèn)題的鍛煉。在以后學(xué)習(xí)中我們將會(huì)更加努力學(xué)習(xí)刻苦鉆研，力爭(zhēng)取得更好的成績(jī)！ 本人 在畢業(yè)設(shè)計(jì)期間，得到 王老師 的精心指導(dǎo) 。對(duì)制作的系統(tǒng)進(jìn)行調(diào)試與應(yīng)用。） e. 能正確顯示日歷時(shí)間，并能通過(guò)矩陣鍵盤作相應(yīng)的調(diào)整。各路信號(hào)通過(guò)矩陣鍵盤顯示于 1602 液晶顯示屏。即將市電經(jīng)過(guò)變壓后整流濾波，通過(guò) 7805 和 7905三端穩(wěn)壓器輸出穩(wěn)定的正負(fù) 5V電壓給系統(tǒng)供電。只要占用 CPU 一個(gè)口線即可。 DS1302 內(nèi)部有一個(gè) 318 的用于臨時(shí)性存放數(shù)據(jù)的 RAM 寄存器。 第 13 頁(yè) 共 21 頁(yè) 萬(wàn)年歷電路 我們采用專用時(shí)鐘芯片 DS1302， DS1302 是美國(guó) DALLAS 公司推出的一種高性能、低功耗、帶 RAM 的實(shí)時(shí)時(shí)鐘電路，它可以對(duì)年、月、日、周日、時(shí)、分、秒進(jìn)行計(jì)時(shí)，具有閏年補(bǔ)償功能，工作電壓為 ～ 。 指令集 1602 通過(guò) D0~D7 的 8 位數(shù)據(jù)端傳輸數(shù)據(jù)和指令。圖 8 為輸出電壓與光照強(qiáng)度的關(guān)系曲線 。 極限參數(shù) 特性見 下 表 ： 名 稱 符號(hào) 參數(shù) 單位 最大功率 Pm 70 mW 工作溫度 TOP 30～ +65 ℃ 偖存溫度 Tstg 30～ +80 ℃ 圖 7 3DU050C封裝 第 11 頁(yè) 共 21 頁(yè) 通過(guò)運(yùn)算放大器輸出電壓信號(hào)，經(jīng) LTC2543A／ D轉(zhuǎn)換電路，將電壓轉(zhuǎn)換成數(shù)字信號(hào)，計(jì)算出光照強(qiáng)度。此傳感器與其他產(chǎn)品相比。 15 微秒。 2 微秒。 。 （ 4） DS18B20 的寫操作 “0” 。 （如果初始化成功則在 15 到 60 毫秒時(shí)間之內(nèi)產(chǎn)生一個(gè)由DS18B20 所返回的低電平 “0” 。 (3)DS18B20 的初始化 “1” 。為讀寫以及溫度轉(zhuǎn)換可以從數(shù)據(jù)線本身獲得能量，不需要外接電源。相當(dāng)于是 67 華氏度 到 257 華氏度 10 ℃ 至 +85 ℃ 范圍內(nèi)精度為 177。 (1)DS18B20 技術(shù)性能描述 如下： a. 獨(dú) 特的單線接口方式， DS18B20 在與微處理器連接時(shí)僅需要一條線即可實(shí)現(xiàn)微處理器與 DS18B20 的雙向通訊。有利于我們走上工作崗位后對(duì)項(xiàng)目設(shè)計(jì)的了解和熟練。國(guó)產(chǎn)大型實(shí)驗(yàn)室用原子吸收 、紫外可見分光度儀、氣相色譜儀等監(jiān)測(cè)儀器自動(dòng)控制技術(shù)采用程度較低，關(guān)鍵零部件尚依進(jìn)口。溫室控制涉及到硬件結(jié)構(gòu)和控制算法等問(wèn)題。2021 年 ,國(guó)家 “863” 計(jì)劃 “ 可控環(huán)境農(nóng)業(yè)生產(chǎn)技術(shù) ” 研究?jī)?nèi)容包含研制可控環(huán)境自動(dòng)控制系統(tǒng)、信息自動(dòng)采集系統(tǒng)等 。s daily life, a gre