【正文】 15 米遠(yuǎn)，你可以再進(jìn)行升級。只要能放入接收盒的外殼不需要很規(guī)則，接收板的接收距離就可 以增至 1020 米遠(yuǎn)，在家庭使用足足有余。 安裝使用注意事項和其他用途 （ 1）安裝應(yīng)遠(yuǎn)離大的金屬體， （ 2）在 20 米內(nèi)不要采用相同信道的無線音樂門鈴，以免產(chǎn)生串?dāng)_； （ 3）可以加磁控開關(guān)或振動傳感器作為防盜報警用，如：發(fā)射機(jī)安裝在樓下貯藏室，接收機(jī)放在樓上，即組成了貯藏室報警器。發(fā)音宏亮，是電子技術(shù)入門的良好實驗套材，使初學(xué)者能一次裝配成功，務(wù)請在動手裝配前仔細(xì)閱讀裝配說明?？梢赞D(zhuǎn)換開關(guān)選擇喜歡的音樂。 但隨著微電子技術(shù)、無線技術(shù)和網(wǎng)絡(luò)技術(shù)的飛速發(fā)展以及人們生活水平的大幅度提高，無線音樂門鈴將滿足不了人們的生活需要，無線可視門鈴已逐漸走進(jìn)人們的生活。就該電路而言，可以加上紅外接收管，只要有人即可使門鈴音樂響起。在整個設(shè)計過程中，我們通過這個方案包括設(shè)計了一套電路原理和 PCB 連接圖，和芯 片上的選擇。 我 在做畢業(yè) 設(shè)計 的 同時也是對課本知識的鞏固和加強(qiáng)，由于課本上的知識太多，平時課間的學(xué)習(xí)并不能很好的理解和運(yùn)用各個元件的功能，而且考試內(nèi)容有限，所以在這次課程設(shè)計過程中，我們了解了很多元件的功能，并且對于其在電路中的使用有了更多的認(rèn)識。而且還可以記住很多東西。認(rèn)識來源于實踐，實踐是認(rèn)識的動力和最終目的，實踐是檢驗真理的唯一標(biāo)準(zhǔn)。 在畫好原理圖后的做 PCB 版時，由于項目組成員對單面板的不熟悉，導(dǎo)致布線后元件出現(xiàn)在另一邊，增加了布線難度，也產(chǎn)生很多不曾注意的問題，今后要牢記這 個教訓(xùn)，使以后布線更加順利。在此期間我們也失落過，也曾一度熱情安徽財貿(mào)職業(yè)學(xué)院畢業(yè)論文 30 高漲。 生活就是這樣，汗水預(yù)示著結(jié)果也見證著收獲。通過實習(xí)，我才真正領(lǐng)略到 “ 艱苦奮斗 ” 這一詞的真正含義，我才意識到老一輩電子設(shè)計為我們的社會付出。我們同樣可以為社會作出我們應(yīng)該做的一切，這有什么不好？我們不斷的反問自己。社會需要我們，我們也可以為社會而工作。 結(jié)論與展望 在現(xiàn)代家庭中，利用無線電技術(shù)制成的無線門鈴和無線防盜報警器已廣為應(yīng)用，但目前市面上所售無線門鈴以簡易型居多，即遙控器與接收器間的數(shù)據(jù)傳輸采用非編碼式，這種門鈴生產(chǎn)成本較 低?？梢詫纹瑱C(jī)技術(shù)應(yīng)用于無線遙控門鈴行業(yè)，使門鈴的功能更加廣泛。加入編譯碼電 路，做個高質(zhì)量的遙控汽車模型也能水到渠成?？梢姡瑹o線遙控門鈴的發(fā)展前景非常樂觀，市場前景非常廣闊，由此，對于門鈴系統(tǒng)的開發(fā)與研究將成為我們電子應(yīng)用專業(yè)人才長期研究的課題?；厥准韧约阂簧顚氋F的時光能于這樣的校園之中，能在眾多學(xué)富五車、才華安徽財貿(mào)職業(yè)學(xué)院畢業(yè)論文 31 橫溢的老師們的熏陶下度過，實是榮幸之極。這 除了自身努力外，與各位老師、同學(xué)和朋友的關(guān)心、支持和鼓勵是分不開的 。老師的諄諄誘導(dǎo)、同學(xué)的出謀劃策，是我堅持完成論文的動力源泉。從論文的選題、文獻(xiàn)的采集、框架的設(shè)計、結(jié)構(gòu)的布局到最終的論文定稿，從內(nèi)容到格式，從標(biāo)題到標(biāo)點， 她 都費(fèi)盡心血。 另外，還要感謝我的班主任張世平老師、姚成老師和系主任劉主任。 感謝 計算機(jī) 系的各位同學(xué)，與他們的交流使我受益頗多。時間的倉促及自身專業(yè)水平的不足，整篇論文肯定存在尚未發(fā)現(xiàn)的缺點和錯誤。 ll wait in the line for one hour to get a ticket, and another two hours at the site, to only see a tiny bit of the place due to the crowds. Last year, 428 million tourists traveled in China over the weeklong holiday in October. Traveling during this period is a matter that needs thorough preparation. If you are short on time to plan the uping Golden Week it may not be a bad idea to avoid some of the most crowded places for now. There is always a place so fascinating that everyone yearns for. Arxan is a place like this. The beauty of Arxan is everlasting regardless of the changing of four seasons. Bestowed by nature, its spectacular seasonal landscape and mountains are just beyond word. Arxan is a crucial destination for the remended travelling route, China Inner Mongolia Arxan — Hailar — Manzhouli. It is also the joint of the four prairies across the SinoMongolian border, where people gravitate towards the exotic atmosphere mixed with Chinese, Russian, and Mongolia elements. As a historic site for the Yitian Battle, Arxan still embodies the spirit of Genghis Khan. Walking into Arxan, you will be amazed by a kaleidoscope of geous colors all the year round the Spring azaleas blooming red in the snow, the Summer sea wavering blue in the breeze, the Autumn leaves painted in yellow covering volcanic traces, and the Winter woods shining white on the vast alpine snowscape. Hinggan League Arxan city is situated in the far eastern area of Inner Mongolia Autonomous Region. Its full name Haren Arxan means hot holy water in the Mongolian language. Arxan is a tourism city in the northern frontier with a blend of large forest, grand prairies, vast snowfield, heaven lake cluster, thermium, as well as volcanic cluster. It is a rare and unique ecotourism base filled with healthy sunshine, clean air and unspoiled green. Nestled close to the country39。s time for the wild fruits to ripe. The picturesque Arxan in Autumn is indeed a fairyland only exists in a dream that satisfies all your fantasies. If it rains heavily on Saturday night, some elderly Chinese will say it is because Zhinu, or the Weaving Maid, is crying on the day she met her husband Niulang, or the Cowherd, on the Milky Way. Most Chinese remember being told this romantic tragedy when they were children on Qixi, or the Seventh Night Festival, which falls on the seventh day of the seventh lunar month, which is usually in early August. This year it falls on Saturday, August 2. Folklore Story As the story goes, once there was a cowherd, Niulang, who lived with his elder brother and sisterinlaw. But she disliked and abused him, and the boy was forced to leave home with only an old cow for pany. The cow, however, was a former god who had violated imperial rules and was sent to earth in bovine form. One day the cow led Niulang to a lake where fairies took a bath on earth. Among them was Zhinu, the most beautiful fairy and a skilled seamstress. The two fell in love at first sight and were soon married. They had a son and daughter and their happy life was held up as an example for hundreds of years in China. Yet in the eyes of the Jade Emperor, the Supreme Deity in Taoism, marriage between a mortal and fairy was strictly forbidden. He ordered the heaven troop to catch Zhinu back. Niulang grew desperate when he discovered Zhinu had been taken back to heaven. Driven by Niulang39。 Festival. In this day, girls will throw a sewing needle into a bowl full of water on the night of Qixi as a test of embroidery skills. If the needle floats on top of the water instead of sinking, it proves the girl is a skilled embroiders. Single women also pray for finding a good husband in the future. And the newly married women pray to bee pregnant quickly. Tradition transformed The love story of Niulang and Zhinu, and the Qixi Festival have been handed down for generations. Yet these ancient traditions and customs are slowly dying out. Many modern Chinese, particularly youngsters, seem to know more about St Valentine39。s Day. More and more young Chinese people begin to celebrate this day in a very similar way as that in western countries. Fewer people than ever will gaze at the heavens on Saturday to pick out the two stars shining bright on either side of the Milky Way, that is, if people even know on which day Qixi falls. There are ready reminders dotted about, in the form of big ads saying Sales on Chinese Valentine39