Nhanganyaya kune hukuru hunhu uye bvunzo nzira dzemwenje-emitting diode LED

A light-emitting diode, kana LED for short, is a semiconductor device inoshandura simba remagetsi kuita simba rechiedza.Kana imwe nguva yekumberi ichipfuura nemuchubhu, simba rinogona kusunungurwa nenzira yechiedza.Ruminous intensity inenge yakaenzana neinoenda mberi.Ruvara runopenya rwakabatana nezvinhu zvechubhu.
Kutanga, maitiro makuru e LED
(1) Mhepo inoshanda yakaderera, uye vamwe vanongoda 1.5-1.7V kuti ubatidze mwenje;(2) Iko kushanda ikozvino idiki, iyo chaiyo kukosha ndeye 10mA;(3) Iine unidirectional conductive hunhu hwakafanana neakajairwa diode, asi yakafa zone Iyo voltage yakakwira zvishoma;(4) Iyo ine yakafanana voltage kudzikamisa maitiro sesilicon zener diode;(5) Nguva yekupindura inokurumidza, nguva kubva pakushandiswa kwemagetsi kusvika pakubuda kwechiedza inongova 1-10ms, uye nguva yekupindura inogona kusvika 100Hz;zvino hupenyu hwesevhisi hurefu , Kazhinji kusvika maawa 100,000 kana kupfuura.
Parizvino, iyo inowanzo shandiswa chiedza-emitting diodes yakatsvuka uye yakasvibirira phosphorescent phosphor (GaP) LEDs, iyo ine kumberi kwemagetsi kudonha kweVF = 2.3V;tsvuku phosphorescent arsenic phosphor (GaASP) LEDs, iyo inodonha mberi kwemhepo inonzi VF = 1.5-1.7V;uye kune yero uye yebhuruu maLEDs anoshandisa silicon carbide nesafire zvinhu, iyo yekumberi voltage inodonha VF = 6V.
Nekuda kwekukwira kumberi volt-ampere curve ye LED, ikozvino-yekumisikidza resistor inofanirwa kubatanidzwa munhevedzano kudzivirira kupisa chubhu.Mudunhu reDC, ikozvino-kumisa kuramba R inogona kufungidzirwa uchishandisa inotevera fomula:
R = (E-VF) / IF
Mumaseketi eAC, ikozvino-kumisa kuramba R inogona kufungidzirwa neinotevera fomula: R = (e-VF) / 2IF, apo e ndiyo yakakosha kukosha kweiyo AC magetsi emagetsi.
Chechipiri, kuedzwa kwechiedza-emitting diodes
Muchiitiko chekushaya chimbo chakakosha, LED inogonawo kufungidzirwa ne multimeter (pano MF30 multimeter inotorwa semuenzaniso).Kutanga, isa iyo multimeter kuRx1k kana Rx100, uye kuyera kumberi nekumashure kuramba kweiyo LED.Kana kupikisa kwepamberi kusingasviki 50kΩ, reverse kuramba haina magumo, zvichiratidza kuti chubhu yakajairika.Kana zvese zvekumberi nekumashure zviri zero kana zvisingaperi, kana kumberi nekudzosera kumashure hunhu hwekuramba huri padyo, zvinoreva kuti chubhu haina kukwana.
Zvadaro, zvinodiwa kuyera kubuda kwechiedza che LED.Nekuti kudonha kwayo kumberi kwemagetsi kuri pamusoro pe1.5V, haigone kuyerwa zvakananga neRx1, Rx1O, Rx1k.Kunyangwe Rx1Ok inoshandisa bhatiri re15V, kuramba kwemukati kwakanyanya, uye chubhu haigone kuvhurwa kuti ibudise mwenje.Nekudaro, iyo nzira yemamita maviri inogona kushandiswa pakuyedza.Multimeters maviri akabatana munhevedzano uye ese ari maviri akaiswa muRx1 chinzvimbo.Nenzira iyi, iyo yakazara bhatiri voltage ndeye 3V uye iyo yakazara yemukati kuramba ndeye 50Ω.Ikozvino kushanda kwakapihwa kuL-print yakakura kupfuura 10mA, inokwana kuita kuti chubhu ibatike uye ibudise chiedza.Kana chubhu isingavheneke panguva yekuedzwa, inoratidza kuti chubhu haina kukwana.
YeVF = 6V LED, unogona kushandisa imwe 6V bhatiri uye yazvino yekumisikidza resistor yekuyedza.


Nguva yekutumira: Mar-19-2020