大家好今天來(lai)介(jie)紹led燈珠18650電阻(led燈珠直接(jie)18650電池)的問題，以下是小編對此問題的歸納(na)整理，來(lai)看(kan)看(kan)吧。

文章目錄列表:

• 1、請教大神圖中LED燈珠只接用18650電池供電需要加多大電阻
• 2、1w的led燈使用36v的18650電池需要電阻嗎
• 3、18650的電池用多大的燈珠最亮
• 4、18650接燈珠用什么電阻
• 5、用18650電池如何點亮20個LED燈

請教大神圖中LED燈珠只接用18650電池供電需要加多大電阻

40歐左(zuo)右(you)金屬電阻(zu)最標準回答(da)完畢成熟經(jing)驗(yan)

1w的led燈使用36v的18650電池需要電阻嗎

1w的led燈珠是3.2v320mA,18650鋰電(dian)池的電(dian)壓是3.7v,只(zhi)要(yao)串一(yi)個電(dian)阻(zu),完全可(ke)以(yi)不(bu)用驅動器而直接點亮,電(dian)阻(zu)值(zhi):R=U/I=(3.7-3.2)/0.32=1.6歐(ou),功率P=U*I=0.5*0.32=0.16w,因為鋰電(dian)池剛充滿時的電(dian)壓最高可(ke)達4.2v,所以(yi)實際可(ke)用1.8-2.2歐(ou),1/2w的電(dian)阻(zu).

18650的電池用多大的燈珠最亮

18650的(de)電(dian)池(chi)用(yong)3.7v的(de)燈(deng)珠最(zui)亮。

18650鋰電(dian)(dian)(dian)(dian)(dian)(dian)池的額(e)定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)與(yu)1WLED的工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)是匹配的，但(dan)鋰電(dian)(dian)(dian)(dian)(dian)(dian)池剛充滿(man)電(dian)(dian)(dian)(dian)(dian)(dian)后輸出的電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)和電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)都會比額(e)定(ding)值(zhi)(zhi)高(gao)一(yi)些，所以(yi)(yi)為了使(shi)燈(deng)(deng)(deng)珠(zhu)穩定(ding)的工(gong)作，就必須(xu)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)池與(yu)燈(deng)(deng)(deng)珠(zhu)之間(jian)加接(jie)限流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)。在(zai)市售的成(cheng)品燈(deng)(deng)(deng)中(zhong)(zhong)，控(kong)制(zhi)開(kai)關大(da)多(duo)分為四(si)擋(dang)，第一(yi)擋(dang)時電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)(zhong)串(chuan)入(ru)的限流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)為200Ω左(zuo)右，第二(er)擋(dang)時電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)(zhong)串(chuan)入(ru)的電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)為100Ω左(zuo)右，第三擋(dang)為直(zhi)通(tong)擋(dang)不接(jie)限流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)，第四(si)擋(dang)為斷開(kai)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)擋(dang)，可以(yi)(yi)根(gen)據電(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)的實際情(qing)況，選擇適(shi)當的檔位，保證(zheng)燈(deng)(deng)(deng)珠(zhu)工(gong)作在(zai)安全的電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)范圍以(yi)(yi)內。你可以(yi)(yi)參(can)考(kao)市售成(cheng)品燈(deng)(deng)(deng)的電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)組成(cheng)方式，在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)(zhong)串(chuan)入(ru)功率、阻(zu)值(zhi)(zhi)（建議選擇1W、100Ω左(zuo)右）適(shi)合的限流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)，就可以(yi)(yi)使(shi)LED燈(deng)(deng)(deng)珠(zhu)安全、正常的工(gong)作了。

18650接燈珠用什么電阻

用(yong)(yong)(yong)什么(me)電(dian)(dian)阻和你用(yong)(yong)(yong)的(de)(de)燈珠有(you)關系。例如普通(tong)的(de)(de)燈珠3伏10毫(hao)安(an)可(ke)以發(fa)光，那么(me)由于(yu)18650最(zui)高電(dian)(dian)壓(ya)可(ke)以達到(dao)4.2伏，燈珠和電(dian)(dian)阻串聯(lian)，電(dian)(dian)阻也是(shi)10毫(hao)安(an)電(dian)(dian)流，那么(me)電(dian)(dian)阻最(zui)小要用(yong)(yong)(yong)120歐，功率(lv)0.25瓦。

用18650電池如何點亮20個LED燈

，18650鋰電池驅動20個LED燈需要用并聯驅動的接法

單節18650鋰電池的(de)標(biao)稱電壓為(wei)3.7V，充滿后的(de)電壓為(wei)4.2V。就算是紅色的(de)LED，它工(gong)作時的(de)壓降也有大約2V。串聯肯定是不現實的(de)，只(zhi)能并(bing)聯驅動。

18650鋰電池并聯驅動20個LED接法

每個(ge)連接(jie)(jie)到18650鋰電(dian)(dian)池(chi)(chi)的(de)(de)LED都需(xu)要(yao)連接(jie)(jie)一個(ge)限流(liu)(liu)電(dian)(dian)阻。需(xu)要(yao)根(gen)據(ju)LED的(de)(de)顏(yan)色(se)和亮(liang)度要(yao)求來計算限流(liu)(liu)電(dian)(dian)阻的(de)(de)阻值(zhi)。假(jia)如使用工作(zuo)壓(ya)降為3V的(de)(de)白(bai)色(se)LED，希望LED的(de)(de)工作(zuo)電(dian)(dian)流(liu)(liu)為10mA。我們以18650鋰電(dian)(dian)池(chi)(chi)電(dian)(dian)壓(ya)為3.7V計算，限流(liu)(liu)電(dian)(dian)阻阻值(zhi)=(3.7V-3.0V)/0.01A=70歐姆。當然，18650鋰電(dian)(dian)池(chi)(chi)充滿電(dian)(dian)時，LED的(de)(de)亮(liang)度會(hui)高(gao)一些，電(dian)(dian)量不足時亮(liang)度就會(hui)暗一些了。

大家(jia)在選擇(ze)限流電阻時，可(ke)以根據(ju)LED的顏色和亮(liang)度(du)，自己適當調整一下(xia)。

鋰(li)電(dian)(dian)(dian)(dian)池(chi)(chi)最怕是過度(du)放電(dian)(dian)(dian)(dian)和過度(du)充(chong)電(dian)(dian)(dian)(dian)，建議給18650鋰(li)電(dian)(dian)(dian)(dian)池(chi)(chi)加裝一個保(bao)護板(ban)再來點亮LED。增加了保(bao)護板(ban)后(hou)，當鋰(li)電(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)壓降低(di)到2.54V后(hou)就會停止放電(dian)(dian)(dian)(dian)，保(bao)護電(dian)(dian)(dian)(dian)池(chi)(chi)不受損壞，充(chong)電(dian)(dian)(dian)(dian)的(de)時候也可以(yi)避免(mian)過度(du)的(de)充(chong)電(dian)(dian)(dian)(dian)。所(suo)要驅(qu)動的(de)LED接到保(bao)護板(ban)的(de)輸出端就可以(yi)了。

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