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led燈如何串聯電阻

電壓5V，串聯(lian)220歐(ou)電阻，所以電流是5-3=2V 2V/220歐(ou)=9毫安左右，為了方便，按10毫安算。

你的LED燈珠應該是DIP燈珠，設計電流(liu)是10毫安(an)。1:不(bu)同(tong)顏色的LED，額定電壓是不(bu)同(tong)的，藍，白，綠可以按3V算，紅，黃按2V算。

2:電(dian)(dian)(dian)源電(dian)(dian)(dian)壓5V，所(suo)(suo)以如果是(shi)(shi)藍(lan)，白，綠(lv)(lv)，你(ni)只(zhi)能N并。不(bu)(bu)能串(chuan)(chuan)聯，不(bu)(bu)然電(dian)(dian)(dian)壓不(bu)(bu)夠(gou)。紅(hong)(hong)(hong)，黃可以2串(chuan)(chuan)N并。這(zhe)(zhe)個(ge)是(shi)(shi)我能想到的(de)(de)(de)(de)最少電(dian)(dian)(dian)阻的(de)(de)(de)(de)辦法。R1通(tong)過的(de)(de)(de)(de)電(dian)(dian)(dian)流(liu)為(wei)：0.01*（白藍(lan)綠(lv)(lv)燈珠(zhu)個(ge)數），這(zhe)(zhe)里(li)是(shi)(shi)9個(ge)，所(suo)(suo)以是(shi)(shi)0.09A那(nei)(nei)么R1的(de)(de)(de)(de)阻值(zhi)為(wei)：（5-3）V/0.09A=22.22歐(ou)，你(ni)用(yong)20-24歐(ou)的(de)(de)(de)(de)都(dou)可以R2通(tong)過的(de)(de)(de)(de)電(dian)(dian)(dian)流(liu)為(wei)：0.01*(紅(hong)(hong)(hong)黃燈的(de)(de)(de)(de)組數），這(zhe)(zhe)里(li)是(shi)(shi)6組，所(suo)(suo)以是(shi)(shi)0.06A那(nei)(nei)么R2的(de)(de)(de)(de)阻值(zhi)為(wei)：（5-4）v/0.06A=16.66歐(ou)，你(ni)用(yong)16-18歐(ou)都(dou)差不(bu)(bu)多本來(lai)還可以用(yong)完全(quan)不(bu)(bu)用(yong)電(dian)(dian)(dian)阻的(de)(de)(de)(de)方案，通(tong)過不(bu)(bu)同顏色(se)燈珠(zhu)的(de)(de)(de)(de)混合，比(bi)如一(yi)個(ge)藍(lan)串(chuan)(chuan)聯一(yi)個(ge)紅(hong)(hong)(hong) 用(yong)5V就可以直接不(bu)(bu)用(yong)電(dian)(dian)(dian)阻，但(dan)是(shi)(shi)因為(wei)不(bu)(bu)知道你(ni)得燈珠(zhu)到底是(shi)(shi)什(shen)么樣(yang)，這(zhe)(zhe)樣(yang)比(bi)較(jiao)危險(xian)，還是(shi)(shi)加個(ge)電(dian)(dian)(dian)阻吧(ba)

求LED燈珠的電阻接法

電流(liu)取中間數15mA時：1、LED工(gong)作電壓為2.0-2.4V，R2.0=6/0.015=400Ω，R2.4=4.8/0.015=320Ω。電阻R可取：320Ω~400Ω；2、LED工(gong)作電壓為3.0-3.4V，R3.0=3/0.015=200Ω，R3.4=4.8/0.015=1600Ω。電阻R可取：160Ω~200Ω；3、電阻功率：1/4w~1/2w。功率盡量取大一點。

燈珠加電阻怎么調節

用的(de)是白(bai)光LED吧因為(wei)LED品種很多，功(gong)率(lv)不一樣，額(e)(e)定(ding)的(de)電(dian)流也不一樣，你要找到LED的(de)額(e)(e)定(ding)電(dian)流，才能確(que)定(ding)使用多大(da)的(de)電(dian)阻。

一般LED白光，工作電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)在(zai)3.2到3.4,電(dian)(dian)(dian)(dian)(dian)(dian)流要(yao)看LED額(e)(e)定電(dian)(dian)(dian)(dian)(dian)(dian)流，比如(ru)(ru)一個1W的(de)(de)燈(deng)珠，額(e)(e)定電(dian)(dian)(dian)(dian)(dian)(dian)流一般是(shi)(shi)350MA，一般我會(hui)降低(di)電(dian)(dian)(dian)(dian)(dian)(dian)流來(lai)提高(gao)壽(shou)命(ming)，會(hui)取工作電(dian)(dian)(dian)(dian)(dian)(dian)流300mA內，工作電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)取3.2，usb 5V，這樣電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)分壓(ya)就(jiu)是(shi)(shi)5減去3.2，電(dian)(dian)(dian)(dian)(dian)(dian)流300，歐姆(mu)定律就(jiu)可以(yi)(yi)算出電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)大小（有(you)條(tiao)件接通后，用(yong)測電(dian)(dian)(dian)(dian)(dian)(dian)流，微調，這個也是(shi)(shi)取電(dian)(dian)(dian)(dian)(dian)(dian)流低(di)于(yu)額(e)(e)定電(dian)(dian)(dian)(dian)(dian)(dian)流的(de)(de)用(yong)處(chu)），不過(guo)需要(yao)注(zhu)意的(de)(de)是(shi)(shi)這個電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)功率(lv)是(shi)(shi)要(yao)比較大的(de)(de)，耗在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)上的(de)(de)有(you)0.5W左右，取2倍以(yi)(yi)上，要(yao)用(yong)1W以(yi)(yi)上的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)。如(ru)(ru)果多(duo)(duo)(duo)顆(ke)燈(deng)珠，就(jiu)要(yao)并聯(lian)了(le)(le)(le)，當然了(le)(le)(le)因為USB2.0的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流只(zhi)有(you)500mA左右，并聯(lian)多(duo)(duo)(duo)了(le)(le)(le)，只(zhi)會(hui)電(dian)(dian)(dian)(dian)(dian)(dian)流更低(di)而已，串聯(lian)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)功率(lv)要(yao)更大了(le)(le)(le)，還(huan)有(you)一個就(jiu)是(shi)(shi)要(yao)注(zhu)意的(de)(de)是(shi)(shi)LED的(de)(de)散(san)熱問題，如(ru)(ru)果鋁(lv)基板小，散(san)熱條(tiao)件差點的(de)(de)，盡量降低(di)電(dian)(dian)(dian)(dian)(dian)(dian)流。目前我用(yong)3顆(ke)1W并聯(lian)，串了(le)(le)(le)7歐多(duo)(duo)(duo)點的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)（三顆(ke)1W，22歐電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)并聯(lian)），已經用(yong)了(le)(le)(le)2年(nian)多(duo)(duo)(duo)了(le)(le)(le)，主要(yao)是(shi)(shi)晚上，關燈(deng)了(le)(le)(le)照屏幕，不然太(tai)刺眼了(le)(le)(le)

Led燈閃怎么加電阻

首先確定你的(de)燈珠(zhu)的(de)額定工作電(dian)壓(ya)，電(dian)流(liu)，然(ran)后根據你的(de)實際供電(dian)最高(gao)電(dian)壓(ya)來配置電(dian)阻阻值，這里的(de)電(dian)阻是(shi)限流(liu)用的(de)。

假如(ru)你的(de)燈(deng)珠(zhu)是(shi)(shi)3V，20mA,你的(de)電(dian)(dian)源(yuan)最高是(shi)(shi)90v，一(yi)塊(kuai)板(ban)子(zi)(zi)可以(yi)放3顆燈(deng)珠(zhu)，那么這塊(kuai)板(ban)子(zi)(zi)就是(shi)(shi)9V的(de)電(dian)(dian)壓，兩(liang)塊(kuai)板(ban)子(zi)(zi)串聯就得18V，供電(dian)(dian)最高電(dian)(dian)壓90V就需要電(dian)(dian)阻(zu)分(fen)擔90-18=72V電(dian)(dian)壓。LED的(de)電(dian)(dian)流最好是(shi)(shi)80%額(e)定電(dian)(dian)流，以(yi)便在亮度(du)足夠的(de)前(qian)提下保持其使用壽(shou)命。

假設我(wo)們(men)讓(rang)它工作在(zai)15mA電流(liu)下，要配置的限(xian)流(liu)電阻(zu)阻(zu)值應為72V/0.015A=4.8K歐(ou)姆(mu)電阻(zu)，實際電阻(zu)阻(zu)值相近(jin)的有(you)4.7K的色環電阻(zu)供(gong)使用。

單路板子計(ji)(ji)算(suan)好了，再根(gen)據每路的供(gong)電(dian)電(dian)流(liu)計(ji)(ji)算(suan)并(bing)聯路數(shu)的總(zong)電(dian)流(liu)，不能(neng)超(chao)過電(dian)源的最大功(gong)率。

以上就是小編對(dui)于怎么(me)給(gei)led燈珠(zhu)接(jie)電(dian)阻(zu)(led燈珠(zhu)做(zuo)燈要不(bu)要加電(dian)阻(zu))問(wen)題和相關問(wen)題的解答了，希(xi)望對(dui)你有用