Kev siv dav ntawm LEDs pib nyob rau nruab nrab-60s ntawm lub xyoo pua xeem. Txij thaum ntawd los, cov cuab yeej no tau hloov pauv ntau yam. Thiab niaj hnub no, thaum LEDs tau poob qis ntawm tus nqi, lawv cov koob meej ntawm cov neeg siv khoom tau nce siab. Lub teeb pom kev zoo los ntawm kev siv LEDs yog kaum kauj ruam ua ntej ntawm cov teeb ci thiab cov khoom siv hluav taws xob fluorescent - lawv muaj ntau zaus ntau dua kev lag luam, txhim khu kev qha thiab ruaj khov.
LED yog dab tsi thiab nws ua haujlwm li cas
Ib qho LED yog ib qho khoom siv uas siv cov khoom ntawm p-n junction thiab emits photons, hloov hluav taws xob tam sim no rau hauv lub teeb hluav taws xob, uas tshwm sim thaum rov qab ua ke ntawm electrons thiab qhov nyob rau hauv cheeb tsam ntawm p-n hlws ris. Ntawd yog, ib qho tsim nyog rau kev sib txuas LEDs los tsim lub teeb ci yog p-n hlws ris, uas yog kev sib cuag ntawm ob lub semiconductors nrog ntau hom conductivity. Rau cov hom phiaj noCov khoom siv hluav taws xob semiconductor raug kho nrog cov neeg txais khoom tsis huv ntawm ib sab, thiab cov khoom pub dawb ntawm lwm qhov. Nyob rau hauv cov ntaub ntawv no, rau lub emission ntawm lub teeb, qhov sib thooj ntawm lub zog ntawm lub teeb quanta ntawm lub pom ntau yam nrog lub band sib txawv ntawm lub active cheeb tsam ntawm lub LED yog tsim nyog. Tsis tas li ntawd, cov siv lead ua yuav tsum muaj qhov tsis txaus ntseeg me me, vim tias qhov rov qab ua ke ntawm cov hluav taws xob thiab qhov hauv thaj tsam ntawm p-n hlws ris tshwm sim tsis muaj hluav taws xob.
Yuav txuas li cas?
Kev sib txuas ntawm LEDs yog ua raws li kev coj ua nruj ntawm polarity. Rau cov hom phiaj no, cov txiaj ntsig ntawm LEDs muaj cov npe tsim nyog: anode thiab cathode. Raws li - ntxiv thiab rho tawm.
Lub LED muaj peev xwm emitting lub ci tsuas yog thaum ncaj qha qhib. Thaum koj tig nws rov qab, nws ua tsis tiav.
Vim tias LED tsuas tuaj yeem tawm lub teeb ntawm qee qhov hluav taws xob thiab qhov tseem ceeb tam sim no, kev txwv tsis pub yuav tsum tau nkag mus rau hauv cov kab kos.
Yuav ua li cas txuas lub LED rau 220V?
Yuav ua li cas thiaj ua tau li no? Txuas lub LED mus rau 220 V qhov tam sim no tsis yooj yim li nws zoo li. Lub ntsiab lus ntawm qhov teeb meem yog nyob rau hauv cov yam ntxwv ntawm cov cuab yeej, uas nws cov hauj lwm yog raws li nyob rau hauv lub hauv paus ntsiab lus ntawm kev hla tam sim no los ntawm cov muaju, raws li ib tug tshwm sim ntawm uas lawv pib tsim ib tug ci. Txhawm rau ua raws li txoj cai no, yuav tsum muaj lwm yam khoom siv - tus tsav tsheb, uas nws txoj haujlwm yog los tswj cov khoom siv tam sim no rau cov siv lead ua. Tib lub sijhawm, tus neeg tsav tsheb txwv nws rau tus nqi uas yuav tsum tau ua rau cov qauv tshwj xeeb ntawm LEDs siv.
Lwm yamKev sib txuas ntawm LEDs yog nqa tawm ncaj qha mus rau qhov hluav taws xob ntawm 220 V thiab yog siv thaum lub LED yuav tsum zoo li qhov ntsuas qis qis thiab thaum tsuas yog ib lossis ob peb lub ntsiab lus koom nrog kev sib txuas. Feem ntau, LED yog siv los ua lub teeb ci thiab txuas nrog tus tsav tsheb uas twb muaj tag nrho cov khoom tsim nyog rau kev ua haujlwm ib txwm ntawm lub cuab yeej.
Lub LED yuav tsis ci yog tias qhov hluav taws xob siv rau nws tsawg dua li qhov xav tau. Ntawm qhov tod tes, yog tias qhov hluav taws xob zoo li no tshaj qhov xav tau, lub cuab yeej yuav ua tsis tiav. Txhawm rau zam cov xwm txheej zoo li no, siv lub ntsuas hluav taws xob tam sim no los txuas rau LED.
Daim duab kwv yees tus tsav tsheb sib txuas rau cov teeb pom kev zoo nkauj LED pom hauv qab no.
Lub ntsiab lus ntawm tus neeg tsav tsheb yog qhov hloov pauv ntawm qhov hloov pauv tam sim no ntws hauv ib lub qhov hluav taws xob hauv tsev, thiab vim li ntawd, qhov tam sim no tau muab rau LED.
Serial txuas ntawm LEDs
Kev sib txuas ntawm cov khoom siv no muaj nws tus yam ntxwv. Txuas ob peb LEDs ib zaug yog qhov ua tau zoo tshaj plaws hauv cov koob. Qhov kev sib txuas no yuav txo qis kev siv hluav taws xob thiab tso cai rau koj txuas tus lej loj tib lub sijhawm. Tab sis tib lub sijhawm, tag nrho cov kev sib txuas ntawm LEDs yuav tsum yog tib yam, thiab cov khoom siv hluav taws xob yuav tsum muaj lub zog txaus thiab muaj peev xwm muab qhov xav tau voltage.
Kev txuas LEDs raws li txoj cai no yooj yim heev. Diodes txuas nrog hauv series. Ib qho piv txwv zoo ntawm kev sib txuas zoo li no yog tsob ntoo Christmas zoo tib yam.
Arduino LED txuas
Yuav daws qhov teeb meem li cas kom lub LED tig rau thiab tawm nrog lub sijhawm ntawm 1 thib ob? Lub npe hu ua duab kos tuaj yeem pab peb nrog qhov no - ib qho kev pab cuam tsim hauv Arduino ib puag ncig. Arduino yog tus tsim hluav taws xob tsim hluav taws xob thiab lub platform yooj yim uas tau dhau los ua cov neeg nyiam siv hluav taws xob ntau tshaj plaws, vim tias qhov system no yooj yim heev thiab siv tau yooj yim. Arduino-based li tuaj yeem tswj tau ntau yam actuators. Tshwj xeeb, LED.
Daim duab hauv qab no qhia txog daim duab sib txuas ntawm LED rau Arduino maub los, uas lub cuab yeej txuas nrog rau yim tso tawm. Qhov tseeb no yuav tsum raug coj mus rau hauv tus account thaum programming, teeb tsa qhov tsim nyog tsis.
Parallel txuas
Kev sib txuas ntawm LEDs tau siv dav los ntawm cov pej xeem hauv lub neej txhua hnub - hauv txhua qhov LED zaub lossis LED matrix.
LEDs muaj cov thev naus laus zis tsis sib xws hauv tus nqi ntawm kev txo qhov hluav taws xob ncaj qha. Yog li ntawd, cov dej sib txawv yuav dhau los ntawm lawv. Nyob rau hauv cov ntaub ntawv no, lub teeb siv kuj yuav txawv, uas tib neeg lub qhov muag perceives raws li txawv brightness. Vim li no, cov dej ntws yuav tsum sib npaug nrog ballast resistors.
Daim duab qhia txog daim duab sib txuasLEDs nyob rau hauv ib txoj kev. Nyob rau tib lub sijhawm, kev xaiv "a" yog qhov yuam kev, nws tsis pom zoo kom siv nws hauv kev xyaum. Qhov kev xaiv raug "b" yog nrog ballast resistors.
Kev sib txuas tus kheej
Ua-nws-koj tus kheej LED kev sib txuas yuav tsum tau ua raws li txhua txoj cai. Rau kev sib txuas, nws yog ib qho tsim nyog yuav tsum siv cov xaim me me vim tias qhov kev tiv thaiv ntawm cov xaim zoo li no yuav luag sib npaug ntawm qhov tsis kam ntawm LEDs. Hauv qhov no, kev paub qhia tau hais tias qhov hluav taws xob poob qis nyob ntawm qhov ntev ntawm cov xaim. Vim li no, cov khoom siv hluav taws xob nyob ze ntawm cov khoom siv LED. Los yog lawv siv cov khoom siv hluav taws xob rau LEDs nrog cov zis hluav taws xob ntawm 24 V, 36 V lossis 48 V. Nyob rau hauv lem, manufacturers ntawm LED strips tsim lawv rau txawv voltages:
Kev sib txuas rau 1.5 V. Nrog rau qhov kev sib txuas no, LEDs, uas nws qhov kev khiav hauj lwm qhov hluav taws xob feem ntau tshaj 1.5 V, xav tau lub zog hluav taws xob tsawg kawg yog 3.2 V. Qhov no, lub tshuab hluav taws xob thaiv yog siv rau kev sib txuas ntawm cov resistor, Transistor thiab transformer
- Txuas mus rau 5 V. Qhov kev sib txuas ntawm LED no suav nrog kev sib txuas ntawm cov resistor nrog qhov tsis kam ntawm 100-200 ohms.
- Txuas rau 9 V. Lub zog hluav taws xob no tsis tshua muaj siv los txuas LEDs. Feem ntau, peb lub diodes tau txuas nrog hauv koob nrog kev ua haujlwm tam sim no ntawm 20 mA.
- Kev sib txuasmus rau 12 V. suav nrog kev txiav txim siab hom chav tsev, nrhiav qhov ntsuas tam sim no, qhov hluav taws xob thiab kev siv hluav taws xob. Nyob rau hauv cov ntaub ntawv ntawm xws li ib tug kev twb kev txuas, nws yog tsim nyog los siv ib tug resistor, uas yog muab tso rau ib feem ntawm cov hluav taws xob Circuit Court.
- Kev sib txuas rau 220 V. Nrog rau qhov kev sib txuas no, nws yog ib qho tsim nyog yuav tsum tau txwv cov theem tam sim no uas yuav dhau los ntawm LED, nrog rau kev txo qis ntawm qhov rov qab LED voltage, vim tias tsuas yog nyob rau hauv txoj kev no nws yuav ua tau. ua tau los tiv thaiv kev tawg. Qib tam sim no txwv los ntawm cov resistors, capacitors lossis inductors.
Cia peb tsom mus txuas rau 220 V network.
Txoj hauv paus ntsiab lus txuas rau tus nqi siab
Yuav ua li cas txuas LED mus rau 220 V network? Raws li twb tau hais lawm, rau kev pom zoo ntawm cov cuab yeej, yuav tsum muaj tus tsav tsheb, txij li txhawm rau ua kom muaj kev sib txuas thiab kom cov cuab yeej ua haujlwm ruaj khov, nws yog ib qho tsim nyog los txo qhov voltage amplitude thiab txo lub zog tam sim no, thiab. Raws li hloov AC voltage rau DC. Ib qho kev faib tawm uas muaj cov resistor lossis capacitive load, nrog rau ntau yam stabilizers, tuaj yeem pab daws qhov teeb meem no.
teeb hloov
LED hloov pauv li cas? Rau peb, kev hloov hluav taws xob hauv cov chav tsev tsis tau xav paub ntev. Txawm li cas los xij, kev nce qib tsis nyob twj ywm, thiab cov tuam ntxhab ntawm cov khoom siv teeb pom kev zoo twb tau txhim kho cov keyboards peb tau siv los ntawm kev muab lawv nrog LED backlighting. Xws lipab kiag li lawm muab rau lawv illumination thaum muab tua. Thaum nruab hnub, xws li kev txhim kho, ntawm chav kawm, yog imperceptible. Tab sis thaum hmo ntuj, qhov zoo li qhov tsis txaus ntseeg no yog qhov tseem ceeb tshaj plaws. Kev sib txuas ntawm qhov hloov pauv nrog LED tsis yog ib txoj haujlwm nyuaj, vim nws tau ua raws li lub tswv yim yooj yim heev. Txawm li cas los xij, kev ceev faj txog kev nyab xeeb yuav tsum tau ua qee yam nuances kom pom.
Raws li koj tuaj yeem pom los ntawm daim duab qhia, lub cuab yeej tsuas muaj ob lub ntsiab lus - tus resistor uas txwv qhov tam sim no, thiab qhov tseeb, lub teeb ci. Lub complexity thiab peculiar paradox nyob rau hauv lub fact tias lub LED yog muab tso rau hauv ib tug 220 V AC hloov. Nyob rau tib lub sijhawm, LED nws tus kheej yog tsim los rau qhov hluav taws xob tas li ntawm 2 mus rau 12 V. Txawm li cas los xij, thaum lub zog tam sim no ntau dua li qhov seem ntawm qhov kev sib txuas ntawm cov hluav taws xob hluav taws xob muaj peev xwm dhau mus, cov hluav taws xob ntau dhau tau hloov mus rau hauv cov cua sov. Thiab yog hais tias tsis muaj resistor nyob rau hauv pem hauv ntej ntawm lub LED, ces tam sim no dhau los ntawm nws yuav tsuas evaporate lub diode siv lead ua. Nws yog txhua yam hais txog tus resistor, uas txiav tawm feem ntau ntawm cov tam sim no.
Ua haujlwm algorithm
Kev sib txuas ntawm LED hauv kev hloov yog ua nyob rau hauv ntau theem:
- Tshuaj tua hluav taws.
- Peb disassemble tus hloov, peb txuas cov khoom rau nws cov terminals raws li daim duab saum toj no.
- Nyob rau hauv lub vaj huam sib luag nrog lub laum nyias, xyaum lub qhov rau qhov tso zis ntawm LED.
- Kev sib sau ua ke.
- Restoring fais fab mov.
- Siv lub cuab yeej.
