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電子技術(shù)綜合實(shí)驗(yàn)箱指導(dǎo)書-wenkub.com

2025-10-21 00:18 本頁面
   

【正文】 life is a simple, calm and peaceful. Always not to choose their own path and regret, life is like a train, the scenery and then the United States will retreat, the passage of time and encounter will eventually drifting further and further away, before is always himself. 25, everyone has a weakness, weakness is true humanity. That has no weakness, a shallow person. That people think there is no weakness, mostly false. Life has shortings, there are shortings is the real life. That no 武漢萊斯特電子 35 one regret, or childish or numbness or Self deception. It is in tolerance of weakness and so on to accept, people live happily. Hello, everyone! I am a party member. The title of my speech is: study and implement the party39。t wait for old just miss. Time to return, seize every moment, again painstakingly again tired also Those struggling to fly. 23, life could not Yimapingchuan, even flat pavement, inevitably there will be a few pieces of roadblocks. Some of the rocks around the past, while others have to move it out. Just move others put the stone is very easy, because the stone from the appearance we can discern。 to get, must work to。 how do you treat people, does not represent how others treat you, if cannot see through this point, only inviting worry. 18, time is like a sponge in the water, as long as you are willing to squeeze, the total water is still there. Every life, after the ups and downs The best test of live, to life, survival and continuation, do not stop the struggle in the joys and sorrows of life on the road, so that different soul to bear life beat, acceptance of 武漢萊斯特電子 33 suffering. 19, indifferent to heart, calmly in table, elegant and fortable life, do not take what is so important. The pursuit will be disappointed。t envy him A sum of, don39。t envy who. Like a person is a kind of feeling, not like a person is true. The truth is easy to explain, I feel Is unspeakable. The best travel life is that you in a strange place found a long lost touched. 11, happy life not in the bustling in, and in the peace of mind。 you pain, no one can understand. Then you only tears to smile. 8, each people have youth, Each youth are a story, the life of the world never gets easier, I want what, wish the world all know, as has been the same。 and when we are in a negative state of mind, you will find many depressed things。t be narrowminded. Poke to care, is a kind of 武漢萊斯特電子 30 openminded, a free and easy. 5, I am not afraid of others behind me a knife, I afraid to look back and see stab me, is my intention to treat people。 not unrewarding perfunctorily, but calm attitude of life of unrestrained selfconfidence. Plain living, there is no noise noisy, no earthly troubles, more did not fill in the discontent of desire, some just a calm, a calm. 3, memory of heart will not good things to erase the, life is a When no movie, pain is a beginning, the struggle is a kind of process, death is a kind of ending. Give up this giving up is the helpless, do not give up the abandoned, do not give up this giving up is ignorance, do not give up should not give up is persistent. 4, a thing figured is heaven, think impassability is hell. Since the living, to live better. Sometimes we because of too narrowminded, too care around the chores and penny wise and pound foolish, not worth the candle. Some things to attract trouble and worry, pletely depends on how we look at and deal with it. Don39。 to implement , do not want to, dare not, not with disciplinary ruler to supervision。 通過撥碼開關(guān)和扭子開關(guān)設(shè)置常見的開路和短路故障 . 實(shí)驗(yàn)設(shè)置: 了解施密特觸發(fā)電路常見故障的現(xiàn)象及對故障的處理方法 . 雙音報警器 第十章 綜合應(yīng)用 數(shù)字時鐘 說明: 555產(chǎn)生時鐘脈沖的純數(shù)電數(shù)字時鐘 函數(shù)發(fā)生器模塊 說明: 用單片機(jī)、模擬電路組成一個綜合波形發(fā)生器。在輸入引腳上通過撥碼開關(guān)選擇不同電壓信號的輸入,控制引腳上通過扭子開關(guān)選擇高低電平,輸出引腳上接不同的顯示器件,并設(shè)置測試點(diǎn) 方便波 形及電壓的測試。 說明: 555芯片產(chǎn)生一個 1S的時鐘脈沖,由 74ls290 計(jì)數(shù),并通過 CD4511譯碼,兩位數(shù)碼管顯示出來。通過連線與顯示模塊連接便可以方便的觀察現(xiàn)象。 實(shí)驗(yàn)設(shè)置: 本模塊以 74LS74 D 觸發(fā)器為例,用撥碼開關(guān)配置芯片的不同工作狀態(tài),用輕觸按鍵作 CP 時鐘輸入,輸出二進(jìn)制代碼以發(fā)光二極管指示,同時留端口為后續(xù)使用。 D 觸發(fā)器 說明: D 觸發(fā)器只有一個信號輸入端,時鐘脈沖 CP 未到來時,輸入端的信號不起任何作用,只有在 CP 信號到來的瞬間,輸出立即變成于輸入相同的 電平。 主從 JK 觸發(fā)器是在 主從 RS 觸發(fā)器 的基礎(chǔ)上組成的。 實(shí)驗(yàn)設(shè)置: 本模塊以 74LS279 四圖騰柱輸出 SR鎖存器 為例,用扭子開關(guān)配置使能芯片,用撥碼開關(guān)為碼型 R、 S 輸入,用輕觸按鍵作 CP 時鐘輸入,輸出二進(jìn) 制代碼以發(fā)光二極管指示,同時留下端口為后續(xù)使用。 數(shù)碼管顯示 說明: CD4511 是一個用于驅(qū)動共陰極 LED (數(shù)碼管)顯示器的 BCD 碼 — 七段碼譯碼器,特點(diǎn):具有 BCD 轉(zhuǎn)換、消隱和鎖存控制、七段譯碼及驅(qū)動功能的 CMOS 電路能夠提供較大的拉電流,可直接驅(qū)動 LED 顯示器。 譯碼器 說明: 譯碼是編碼的逆過程,本節(jié)以二 十進(jìn)制譯碼器為例,將四位 BCD 碼的十進(jìn)制代碼翻譯成 09 十個對應(yīng)輸出信號的電路。 實(shí)驗(yàn)設(shè)置: 通過對基本門電路的 學(xué)習(xí),可以認(rèn)識到 TTL 集成門電路和 CMOS 門的區(qū)別和應(yīng)用場合。 第四章 波形發(fā)生電路 本章節(jié)配套模塊電路: RC 橋式正弦波振蕩電路 LC 正弦波振蕩器電路 三角波發(fā)生器 8038 集成函數(shù)發(fā)生器 RC 橋式正弦波振蕩電路 模塊組成: 電容、電阻、電位器、二極管、集成運(yùn)放 LM471 說明: 可通過調(diào)節(jié)電位器來改變正弦波的頻率和幅度 實(shí)驗(yàn)設(shè)置: ① 通過實(shí)驗(yàn)了解 RC橋式正弦波振蕩電路的工作原理; 武漢萊斯特電子 20 LC 正弦波振蕩器電路 模塊組成: 三極管、電阻、電容、電感組成 說明: 可以通過示波器觀察其現(xiàn)象 實(shí)驗(yàn)設(shè)置: ① 通過實(shí)驗(yàn)了解 LC正弦波振蕩電路的工作原理; 三角波發(fā)生器 模塊組成: 雙向穩(wěn)壓管、電阻、電位器、電容、電感和 LM741 組成 說明: 可以通過示波器觀察其現(xiàn)象 實(shí)驗(yàn)設(shè)置: ① 通過實(shí)驗(yàn)了解三角波發(fā)生器電路的工作原理; 8038 集成函數(shù)發(fā)生器 模塊組成: 電阻、電容、電位器以及 8038 集成函數(shù)發(fā)生器組成 說明: 可以通過示波器觀察其現(xiàn) 象 實(shí)驗(yàn)設(shè)置: ① 通過實(shí)驗(yàn)了解集成函數(shù)發(fā)生器的應(yīng)用方法; 第五章 數(shù)字電路基礎(chǔ) 本章節(jié)配套模塊電路: 三種基本邏輯門及 OC 邏輯門電路模塊 三種基本邏輯門及 OC 邏輯門電路模塊 模塊組成: 三種基本邏輯門電路模塊 ,通過三極管、二極管等組成的( TTL )與門、或門、非門。 電路中電容 C2 為自舉電容,它和 R2 及 R3 組成自舉電路,使 B點(diǎn)的電位隨輸出電壓的增高而增高,擴(kuò)大了電路的動態(tài)范圍。 實(shí)驗(yàn)設(shè)置: 本實(shí)驗(yàn)中,學(xué)會識別及檢測集成功率放大器及色環(huán)電阻,電容等常用電子元件的好壞,會搭建由集成功放組成的 OTL 功率放大器,會測試 OTL功率放大器主要性能指標(biāo)。 說明: 本實(shí)驗(yàn)?zāi)K通過扭子開關(guān)選擇接通及電位器改變參數(shù),配置成反向比例運(yùn)算放大器、同向比例運(yùn)算放大器、差分輸入運(yùn)放電路、加法、減法運(yùn)放電路。 ( 3)調(diào)節(jié)電位器 RP 至最小位置時,燈泡突然熄滅。由 BT33 組成的單結(jié)晶體管張弛振蕩器停振,可造成燈泡不亮,不可調(diào)光。 實(shí)驗(yàn)內(nèi)容 ( 1)由于電路直接與市電相連,調(diào)試時應(yīng)注意安全,防止觸電。此后,電容又重新充電,重復(fù)上述過程,結(jié)果在電容上形成鋸齒狀電壓,在 R3 上則形成脈沖電壓。接通電源前,電容 C上電壓為零。二是控制極與陰極之間也要接正向電壓; ② 晶閘管一旦導(dǎo)通后,降低或去掉控制極電壓,晶閘管仍然導(dǎo)通; ③ 晶閘管導(dǎo)通后要關(guān)斷時,必須減小其陽極電流使其小于晶閘管的導(dǎo)通維持電流。 可控硅和三極管的共同點(diǎn)在于:都是電流控制器件,都可以起到開關(guān)作用;不同點(diǎn)在于:三極管需要電流持續(xù)控制,可精確控制,可控硅導(dǎo)通后可以撤消控制電流,控制電流失去控制作用,負(fù)載電流取決于負(fù)載大小,可控硅在無控制電流和負(fù)載電流情況下會自動關(guān)斷。廣
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