led 5730燈珠阻值 怎么測LED燈珠好壞 |
| 發布時間:2022-08-23 13:47:56 |
大家好今天來介紹led 5730燈珠(zhu)阻值的問(wen)題，以(yi)下是小編對此問(wen)題的歸(gui)納整理(li)，來看看吧。 文章目錄列表:42V變3Led5730怎樣計算限流電阻要(yao)計算這個限流(liu)電阻(zu)的阻(zu)值(zhi)，必須要(yao)知道這種led燈(deng)珠（5730）的電性能參數（額定正向電壓(ya)v正和額定電流(liu)i），還要(yao)看(kan)是幾(ji)顆(ke)這樣的led燈(deng)珠串聯(lian)。具體(ti)可以(yi)選用下面的計算公(gong)式：r=u/i,u=輸入電壓(ya)-v正*n（n為(wei)串聯(lian)的led燈(deng)珠數量），該電阻(zu)的功率(lv)值(zhi)選用要(yao)大于(yu)每路(lu)串聯(lian)的led的總(zong)功率(lv)。
怎樣測led 串聯燈珠好壞用(yong)電(dian)(dian)(dian)(dian)容(rong)(rong)和(he)電(dian)(dian)(dian)(dian)阻(zu)(zu)檔(dang)測。5730燈(deng)珠(zhu)(zhu)(zhu)正(zheng)(zheng)向電(dian)(dian)(dian)(dian)容(rong)(rong)是(shi)約(yue)0.5至0.1nF、反向電(dian)(dian)(dian)(dian)容(rong)(rong)比正(zheng)(zheng)向電(dian)(dian)(dian)(dian)容(rong)(rong)稍小、不(bu)同品(pin)牌和(he)型號測出(chu)的(de)不(bu)一(yi)樣、有的(de)正(zheng)(zheng)反向電(dian)(dian)(dian)(dian)容(rong)(rong)都(dou)可低至約(yue)0.07nF。是(shi)以上(shang)值(zhi)的(de)、能用(yong)3.3伏(fu)(fu)電(dian)(dian)(dian)(dian)點亮(liang)且亮(liang)度正(zheng)(zheng)常、都(dou)算正(zheng)(zheng)常。用(yong)3.3伏(fu)(fu)電(dian)(dian)(dian)(dian)試(shi)纔是(shi)關鍵。3.3伏(fu)(fu)電(dian)(dian)(dian)(dian)竝(bing)不(bu)難找、電(dian)(dian)(dian)(dian)腦上(shang)就有、一(yi)般(ban)充電(dian)(dian)(dian)(dian)器(qi)(qi)上(shang)都(dou)有、編程(cheng)器(qi)(qi)上(shang)亦(yi)有。沒辦法接(jie)出(chu)3.3伏(fu)(fu)電(dian)(dian)(dian)(dian)的(de)話、用(yong)5伏(fu)(fu)電(dian)(dian)(dian)(dian)亦(yi)可。一(yi)般(ban)手機充電(dian)(dian)(dian)(dian)器(qi)(qi)輸(shu)出(chu)電(dian)(dian)(dian)(dian)壓是(shi)5伏(fu)(fu)、5伏(fu)(fu)電(dian)(dian)(dian)(dian)試(shi)一(yi)下竝(bing)不(bu)會(hui)燒壞燈(deng)珠(zhu)(zhu)(zhu)。5730燈(deng)珠(zhu)(zhu)(zhu)大(da)多(duo)可承受6.667伏(fu)(fu)電(dian)(dian)(dian)(dian)。正(zheng)(zheng)常LED燈(deng)珠(zhu)(zhu)(zhu)冷(leng)態正(zheng)(zheng)反向電(dian)(dian)(dian)(dian)阻(zu)(zu)都(dou)很大(da)、用(yong)一(yi)般(ban)萬(wan)用(yong)表(biao)測不(bu)出(chu)。壞LED燈(deng)珠(zhu)(zhu)(zhu)有的(de)仍能亮(liang)、但亮(liang)度不(bu)足、能被一(yi)般(ban)萬(wan)用(yong)表(biao)測出(chu)冷(leng)態電(dian)(dian)(dian)(dian)阻(zu)(zu)。 5730燈珠可以用多大電阻代替你這(zhe)么算限(xian)流(liu)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)是(shi)正(zheng)確(que)的(de)(de)。如(ru)果用6.9歐的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)（沒有6.9歐的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)，可用6.8歐的(de)(de)代），電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)消(xiao)耗的(de)(de)功率為0.81^2*6.9=4.53W，至少要(yao)用10W的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)。而(er)用18歐的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)，總電(dian)(dian)(dian)(dian)(dian)流(liu)是(shi)(12-6.4)/18=0.311A，電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)消(xiao)耗的(de)(de)功率是(shi)0.311^2*18=1.74W，要(yao)用5W的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)。最好(hao)是(shi)每(mei)串(chuan)用一個限(xian)流(liu)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)，這(zhe)時電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)要(yao)按單(dan)串(chuan)來算。 用(yong)限流(liu)(liu)的方式來點LED很浪費電(dian)，也不安全（電(dian)阻(zu)容易起(qi)火(huo)），你最好還是用(yong)恒流(liu)(liu)驅動電(dian)源來驅動，可以淘一個，價格也便宜。 樓上說得對(dui)，可(ke)以接成(cheng)3串6并，這樣可(ke)以減(jian)小(xiao)限(xian)流電(dian)阻的電(dian)能消耗。 LED燈珠阻值燈珠分高阻低阻之分，多為用(yong)萬用(yong)表10K檔測，阻值為120多K，且燈珠微亮屬(shu)正常 5730led燈珠限流電阻是怎樣計算的計算的依據是根據5730的燈芯正常(chang)發光時所需(xu)的電(dian)壓和工作(zuo)電(dian)流得(de)出的。 以上就是小編對(dui)(dui)于led 5730燈珠阻(zu)值問題和(he)相(xiang)關問題的(de)解答(da)了，希(xi)望對(dui)(dui)你有用 |
