Luminous Diode Resistance Txias Kev Paub

Kuv puas yuav tsum tau ntxiv kev tiv thaiv? Yuav ua li cas tsis muaj kev tiv thaiv tsis muaj qhov hluav taws xob? Yog, lub teeb-emitting diode yuav tsum tau ntxiv nrog rau kev siv. Lub teeb emitting diode tsis tuaj yeem ncaj qha rau qee qhov voltage. Cov dej tsis kam yuav tsum txwv. Lwm yam. Vim li cas lub teeb emitting diode tsis tuaj yeem txuas ncaj qha mus rau qhov hluav taws xob glow diodes uas tsis tuaj yeem txuas ncaj qha mus rau ob qhov kawg ntawm qhov hluav taws xob feem ntau tshwm sim los ntawm ob qho laj thawj: 1) qhov zoo voltage poob tsis sib haum; 2) tam sim no cov kev hloov pauv loj. Yog vim li cas hauv qab no. Qhov zoo siab poob ntawm lub teeb-emitting diode yog txawv. Thaum ua hauj lwm ib txwm, lub teeb emitting diode yuav muaj qhov zoo siab poob VF. VF tsis yog ib qho txiaj ntsig, tab sis muaj peev xwm. Siv lub teeb liab emitting diode ua piv txwv, qhov ntau ntawm VF yog (1.7-2.2) V, thiab txhua zaus Cov yam ntxwv ntawm lub teeb diode tsis zoo, thiab nws txawv me ntsis, yog li nws nyuaj rau nrhiav. ib tug voltage uas haum rau tag nrho cov diode. 2. Txoj kev raug rau lub teeb emitting diode. Lub teeb emitting diode feem ntau muaj ob txoj kev tsav tsheb. Thawj txoj kev yog txuas nrog tam sim no - txwv tsis pub txoj hlua nyob hauv qhov hluav taws xob; txoj kev thib ob yog siv qhov chaw tam sim no los tsav. Tsis tu ncua voltage tsav tsheb. Txhawm rau tiv thaiv qhov tam sim no los ntawm qhov loj dhau, lub teeb-emitting diode raug hlawv tawm, thiab lub teeb-emitting diode thiab qhov tam sim no-limiting kuj yuav tsum tau kwj. Tus nqi ntawm qhov tsis kam yog xaus los ntawm cov qauv hauv qab no: R = (V-Vf) / i. Ntawm lawv, VF yog lub zog rau pem hauv ntej ntawm emitting diode, thiab kuv yog tam sim no uas kuv xav kom ntws. Siv lub teeb liab emitting diode raws li piv txwv, qhov ntau ntawm lub hauv ntej voltage nco VF yog (1.7-2.2) V thiab ua hauj lwm tam sim no yog 2-25mA. Yog tias koj coj nws mus rau hauv cov mis. Txoj kev tsav tsheb no feem ntau yog siv nyob rau hauv rooj plaub uas tus naj npawb ntawm LEDs me me. Yog tias nws yog siv los ua qhov taw qhia lub zog thiab lub tswb ntsuas lub teeb hluav taws xob, yog tias tus naj npawb ntawm cov tsav tsheb diode loj, koj tuaj yeem txiav txim siab siv tus tsav tsheb tam sim no. Hengliu qhov chaw yog dav siv hauv kev lag luam teeb pom kev zoo hauv tsev. Txij li thaum tag nrho cov LEDs txuas nrog hauv series, tsuav yog ib qho LED puas lawm, tag nrho cov LEDs tsis ci. 3. Kev sib piv ntawm ob txoj kev tsav tsheb, txoj kev txwv tam sim no, feem ntau yog siv nyob rau hauv rooj plaub uas tus naj npawb ntawm LED teeb hlaws yog me me. Qhov kom zoo dua yog tias lub voj voog yog qhov yooj yim, thiab qhov tsis zoo yog qhov txo qis ntawm lub teeb emitting diode tsis sib xws, yog li qhov ci ntawm ntau yam siv sib txawv. Txoj kev tsav tsheb ntawm Hengliu tuaj yeem xyuas kom meej tias qhov ci ntsa iab ntawm txhua lub emitting diode yog qhov zoo ib yam, tab sis kev puas tsuaj ntawm ib tus neeg LED teeb hlaws yuav cuam tshuam rau kev ua haujlwm ntawm tag nrho LED teeb hlaws. Cov ntsiab lus ntawm lub teeb emitting diodes tsis tuaj yeem siv ncaj qha rau hauv cov khoom siv hluav taws xob.