led燈珠阻值影響亮度嗎 led燈珠要加電阻嗎 |
| 發布時間:2022-09-20 12:23:56 |
大家好我(wo)是(shi)小編榮姐今(jin)天我(wo)們來介紹led燈珠(zhu)阻值影響亮度嗎(ma) led燈珠(zhu)要加電阻嗎(ma)的問(wen)題(ti)，以下就(jiu)是(shi)榮姐對此問(wen)題(ti)和相關(guan)問(wen)題(ti)的歸(gui)納整理,一起來看看吧。 文章目錄導航: 紅色LED燈不太亮是加電阻還是減電阻急急 LED燈不是(shi)一定要(yao)加(jia)電(dian)(dian)阻，如果電(dian)(dian)源(yuan)是(shi)恒流(liu)的(de)，可以(yi)(yi)不用電(dian)(dian)阻的(de)。因(yin)為LED非線性元(yuan)件，對電(dian)(dian)壓很敏感，無法(fa)以(yi)(yi)電(dian)(dian)壓方式控制(zhi)，主要(yao)是(shi)以(yi)(yi)電(dian)(dian)流(liu)的(de)方式控制(zhi)LED燈亮度，加(jia)電(dian)(dian)阻只是(shi)限流(liu)而已，其實加(jia)電(dian)(dian)阻會影響(xiang)LED燈效(xiao)率，小功率的(de)LED燈可以(yi)(yi)忽略電(dian)(dian)阻上(shang)的(de)損耗，而大功率的(de)LED燈是(shi)直(zhi)接(jie)用恒流(liu)電(dian)(dian)源(yuan)供電(dian)(dian)，這(zhe)樣效(xiao)率更高。 你這個電路必(bi)須要(yao)加(jia)電阻，不(bu)能(neng)用5個燈串聯，用3個燈就好(hao)了，然(ran)后每組加(jia)一個100歐左(zuo)右的電阻。可(ke)以根據需要(yao)的亮(liang)度更改電阻大小，電阻越小，燈越亮(liang)。祝你成功
led燈珠為什么加電阻 led燈珠加電阻(zu)為(wei)了降低工作電流。 2.LED燈(deng)(deng)(deng)(deng)珠(zhu)不是(shi)一定要(yao)加(jia)電(dian)阻(zu)(zu),如(ru)果(guo)電(dian)源是(shi)恒流(liu)(liu)的(de)可以不用電(dian)阻(zu)(zu)。但是(shi)因為LED非(fei)線性元件,對工和電(dian)壓很敏(min)感(gan),無法以電(dian)壓方(fang)式控(kong)制,主要(yao)是(shi)以電(dian)流(liu)(liu)的(de)方(fang)式控(kong)制LED燈(deng)(deng)(deng)(deng)珠(zhu)亮度,加(jia)電(dian)阻(zu)(zu)就是(shi)為了限流(liu)(liu),其實加(jia)電(dian)阻(zu)(zu)會影響LED燈(deng)(deng)(deng)(deng)珠(zhu)光轉化(hua)效(xiao)率,小功率的(de)LED燈(deng)(deng)(deng)(deng)珠(zhu)可以忽略電(dian)阻(zu)(zu)上的(de)損耗(hao),而(er)大功率的(de)LED燈(deng)(deng)(deng)(deng)珠(zhu)一般是(shi)直接用恒流(liu)(liu)電(dian)源供電(dian)。 3.LED燈珠加電(dian)阻(zu),說到底(di)是(shi)因為如果不加電(dian)阻(zu),LED燈會因工作(zuo)電(dian)流過大(da)會使得PN結(jie)發熱嚴重,燒壞PN結(jie)。過高的電(dian)壓顯然會導致過高的電(dian)流,光衰也會加劇(ju)。縮(suo)短LED燈珠的壽命。 LED燈珠阻值 一、2V左右點(dian)亮的(de)LED燈(如紅、黃、橙等)：12V：470歐車(che)上12V：680歐 二：3V左右點(dian)亮的LED燈(如藍(lan)、綠、白等)：12V：390歐車上12V：470歐電(dian)阻(zu)的參數一般有兩個，阻(zu)值(zhi)R和功率P。R=（U-Uled）/Iled，USB的標準電(dian)壓是DC5V的，所以R=（5-Uled）/IledUled，燈珠(zhu)的正向導(dao)通電(dian)壓。Iled，燈珠(zhu)的正向導(dao)通電(dian)流。 現在LED有(you)很多種類，顏色不同(tong)，一般電流也(ye)不同(tong)。電阻大(da)小影響電流大(da)小，進而影響燈(deng)珠的亮度，但只(zhi)要(yao)不超(chao)過正向最大(da)電流，都可以(yi)使用，只(zhi)是亮度或有(you)不同(tong)，所以(yi)選擇范圍比(bi)較(jiao)大(da)。 led燈 加電阻調暗會省電嗎 led燈的(de)亮(liang)度(du)取決于使(shi)用燈珠(zhu)(zhu)上(shang)(shang)的(de)電(dian)(dian)(dian)(dian)流大小。在(zai)燈珠(zhu)(zhu)電(dian)(dian)(dian)(dian)路上(shang)(shang)串(chuan)接(jie)電(dian)(dian)(dian)(dian)阻就(jiu)會使(shi)電(dian)(dian)(dian)(dian)路上(shang)(shang)電(dian)(dian)(dian)(dian)流減(jian)小，燈肯定變暗。燈珠(zhu)(zhu)也(ye)有工(gong)作電(dian)(dian)(dian)(dian)流范圍，超(chao)出就(jiu)會燒(shao)壞燈。led燈珠(zhu)(zhu)對電(dian)(dian)(dian)(dian)流很敏感，mA級(ji)的(de)增、減(jian)都可引(yin)起亮(liang)度(du)明(ming)顯變化。原則(ze)上(shang)(shang)用電(dian)(dian)(dian)(dian)阻串(chuan)聯可調暗燈，但(dan)并(bing)不省電(dian)(dian)(dian)(dian)，因為加用的(de)電(dian)(dian)(dian)(dian)阻也(ye)會耗(hao)電(dian)(dian)(dian)(dian)，電(dian)(dian)(dian)(dian)阻上(shang)(shang)的(de)耗(hao)電(dian)(dian)(dian)(dian)比(bi)燈珠(zhu)(zhu)上(shang)(shang)的(de)耗(hao)電(dian)(dian)(dian)(dian)還(huan)會大些。 led燈 加電阻調暗會省電嗎 led燈(deng)(deng)(deng)(deng)的亮度取決于使用(yong)燈(deng)(deng)(deng)(deng)珠(zhu)(zhu)上(shang)的電(dian)(dian)(dian)流大小。在燈(deng)(deng)(deng)(deng)珠(zhu)(zhu)電(dian)(dian)(dian)路上(shang)串接電(dian)(dian)(dian)阻(zu)就會(hui)使電(dian)(dian)(dian)路上(shang)電(dian)(dian)(dian)流減(jian)小，燈(deng)(deng)(deng)(deng)肯定變(bian)暗(an)。燈(deng)(deng)(deng)(deng)珠(zhu)(zhu)也有(you)工作電(dian)(dian)(dian)流范(fan)圍，超(chao)出就會(hui)燒壞燈(deng)(deng)(deng)(deng)。led燈(deng)(deng)(deng)(deng)珠(zhu)(zhu)對電(dian)(dian)(dian)流很敏感，mA級(ji)的增、減(jian)都(dou)可引起亮度明(ming)顯變(bian)化。原則上(shang)用(yong)電(dian)(dian)(dian)阻(zu)串聯(lian)可調暗(an)燈(deng)(deng)(deng)(deng)，但并不(bu)省電(dian)(dian)(dian)，因為加用(yong)的電(dian)(dian)(dian)阻(zu)也會(hui)耗(hao)電(dian)(dian)(dian)，電(dian)(dian)(dian)阻(zu)上(shang)的耗(hao)電(dian)(dian)(dian)比燈(deng)(deng)(deng)(deng)珠(zhu)(zhu)上(shang)的耗(hao)電(dian)(dian)(dian)還會(hui)大些。 以(yi)上(shang)就(jiu)是天成小編對于led燈(deng)珠(zhu)阻值影響(xiang)亮(liang)度嗎(ma) led燈(deng)珠(zhu)要加電(dian)阻嗎(ma)問(wen)題和(he)相關(guan)問(wen)題的(de)解(jie)答了，希望對你(ni)有用 【責任編輯：榮姐】 |
