【正文】 tude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. The supersonic descent could happen as early as Sunda. The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform. Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。t start planning... Those years, those days of do, finally, like youth, will end in our life. 此刻，天空是陰暗的，空氣里有著剛下過(guò)雨之后的清新因子。想要的，不想要的，界限明確，好像沒(méi)有什么可以撼動(dòng)自己。 Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isn39。s governing body, has also ordered an immediate investigation into the referee39。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under Further help. If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a damagesbased agreement. In England and Wales, your solicitor can39。 圖 11 數(shù)據(jù)采集子程序結(jié)構(gòu)流程圖 充電子程序的設(shè)計(jì) 充電過(guò)程分兩階段進(jìn)行，第一階段為恒流充電，充電電流可設(shè)定，當(dāng)充電電壓達(dá)到 4V時(shí)轉(zhuǎn)入第二階段，即 的恒壓充電方式，恒壓充電電流會(huì)隨著時(shí)間的推移而逐漸降低，待充電電流降到 時(shí)，表明電池已充到額定容量的 93%～ 95%，此時(shí)即可認(rèn)為基本充滿，如果繼續(xù)充下去，充電電流會(huì)慢慢降低到零，電池完全充滿 [4]。然后判斷 P1口是否有鍵按下，如果沒(méi)鍵按下繼續(xù)判斷。因此，在單片機(jī)運(yùn)行后，首先清 0使之置初始參數(shù)設(shè)定，便于程序設(shè)計(jì)人員掌握，以利系統(tǒng)的工作。 通常所用的按鍵為輕觸機(jī)械開(kāi)關(guān)，正常情況下按鍵的接點(diǎn)是斷開(kāi)的，當(dāng)我們按壓按鈕時(shí)，由于機(jī)械觸點(diǎn)的彈性作用，一個(gè)按鍵開(kāi)關(guān)在閉合時(shí)不會(huì)馬上穩(wěn)定地接通，在斷開(kāi)時(shí)也不會(huì)一下子斷開(kāi)。起到承上啟下的作用。還有 Sepic、 Zeta 電路。其等效電路如圖： 圖 6 DC/DC 變換器廣泛應(yīng)用于便攜裝置（如筆記本計(jì)算機(jī)、蜂窩電話、 PDA 等）中。傳導(dǎo)通路的接線端與傳感器引腳（引腳 5 到 8）之間電氣絕緣。典型應(yīng)用包括電動(dòng)機(jī)控制、載荷檢測(cè)和管理、開(kāi)關(guān)式電源和過(guò)電流 故障保護(hù)。 （ 6）低功耗看門(mén)狗定時(shí)器電流：當(dāng)供電電壓為 ，消耗電流僅 500nA。 PIC16F1937單片機(jī)采用了 nanoWatt XLP 技術(shù)的 CMOS 閃存單片機(jī)。此處的 R6=15K,R7=5K,其輸出電壓 =*（ 1+3） =。 電路各部分 元器件功能說(shuō)明 （ 1） D1：肖特基二極管。 LM2576 系列的穩(wěn)壓器是單片集成電路，能提供降壓開(kāi)關(guān)穩(wěn)壓器（ buck）的各種功能，能驅(qū)動(dòng) 3A 的負(fù)載，有優(yōu)異 的線性和負(fù)載調(diào)整能力。而設(shè)計(jì)者多習(xí)慣采用線性穩(wěn)壓器件 (如 78xx系列三端穩(wěn)壓器件 )作為電壓調(diào)節(jié)和 穩(wěn)壓器件來(lái)將較高的直流電壓轉(zhuǎn)變 MCU 所需的工作電壓。本系統(tǒng)將采用 PIC16F1937 作為充電電路的控制器，從而以較低的成本輕松實(shí)現(xiàn)復(fù)雜的充電智能控制，同時(shí)也可以為其他小型電子產(chǎn)品提供潔凈的直流電源。充電過(guò)程中采用 LED 燈、數(shù)碼管指示，系統(tǒng)中設(shè)計(jì)有完備的過(guò)流過(guò)壓保護(hù)，避免因電池過(guò)度充電而損壞，并且充電器采用模塊式結(jié)構(gòu)和 USB 接口，可對(duì)手機(jī)、 MP攝像機(jī)等多種數(shù)碼產(chǎn)品充電。多晶硅薄膜太陽(yáng)能電池與單晶硅比較，成 本低廉，而效率高于非晶硅薄膜電池，其實(shí)驗(yàn)室最高轉(zhuǎn)換效率為 18%,工業(yè)規(guī)模生產(chǎn)的轉(zhuǎn)換效率為 10%。這對(duì)改善生態(tài)環(huán)境、緩解溫室氣體的有害 hk 作用具有重大意義。 現(xiàn)如今手機(jī)是人們的重要的通訊工具，所以由于電池沒(méi)電造成的干擾就日漸明顯，使用手機(jī)的人都有過(guò)這樣的經(jīng)歷，外出或 旅游時(shí)電池突然沒(méi)電了，因不能及時(shí)找到或沒(méi)有220V 市電而無(wú)法給手機(jī)充電，影響了手機(jī)的正常使用。 關(guān)鍵詞： 太陽(yáng)能，電池，單片機(jī)，智能， BUCK 變換 Multipurpose solar mobile charger Abstract Solar relative to other energy, is a renewable, never exhaustless, other energy resources are scarce limited ， Increasing depletion of fossil energy, it39。 太陽(yáng)能充電器的優(yōu)點(diǎn) 多功能太陽(yáng)能充電器相對(duì)于其他的能源，是可再生的，永遠(yuǎn)也用不完，其他能源的話，一個(gè)是資源稀缺有限，第二個(gè)要花很多錢(qián)，多功能太陽(yáng)能充電器的話，是真正不花錢(qián)的，一年的維護(hù)費(fèi)用相當(dāng)于普通能源的 10%左右，所以在節(jié)能、經(jīng)濟(jì)、安全方面，多功能太陽(yáng)能充電器都有它的好處。 硅太陽(yáng)能電池片常用的為單晶 125大倒角，其尺寸為 125mm*125mm，對(duì)角線 150mm，功率 ，工作電壓 ，工作電流 ，開(kāi)路電壓 ，短路電流 。這種便捷的太陽(yáng)能充電器 幾乎可以在任何地方補(bǔ)充電力，從而獲得通信的自有。因此該設(shè)計(jì)采用模塊式組合，根據(jù)不同充電負(fù)載的需要，將太陽(yáng)能板進(jìn)行組合以達(dá)到具有一定要求的輸出功率和輸出電壓的一組光伏電池。 而開(kāi)