Lub Hwj Huam Muaj Hwj Huam LED Tsav Tsheb: 12 Cov Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:30

Lub zog loj LED: lub teeb pom kev yav tom ntej!

tab sis … koj siv lawv li cas? koj tau lawv nyob qhov twg? 1-watt thiab 3-watt Power LED's tam sim no muaj dav nyob hauv $ 3 txog $ 5 ntau, yog li kuv tau ua haujlwm ntawm cov phiaj xwm tsis ntev los no uas siv lawv. hauv tus txheej txheem nws tau ua rau kuv tias qhov kev xaiv tsuas yog ib tus neeg tham txog kev tsav tsheb LED yog: (1) tus tiv thaiv, lossis (2) cov khoom siv hluav taws xob kim heev. tam sim no tias LED tus nqi $ 3, nws xav tias tsis raug them $ 20 rau lub cuab yeej tsav lawv! Yog li kuv tau rov qab mus rau kuv phau ntawv "Analog Circuits 101", thiab xam tawm ob peb txoj kev yooj yim rau kev tsav lub zog LED uas tsuas yog tus nqi $ 1 lossis $ 2. Cov lus qhia no yuav ua rau koj tshuab ntxhua khaub ncaws ntawm txhua hom sib txawv ntawm cov khoom siv rau lub zog loj LED, txhua yam los ntawm cov neeg tawm tsam los hloov cov khoom siv, nrog qee cov lus qhia ntawm txhua tus ntawm lawv, thiab tau kawg yuav qhia ntau yam ntawm kuv lub zog yooj yim tshiab Cov tsav tsheb LED thiab thaum twg/yuav siv lawv li cas (thiab kuv tau txais 3 lwm cov lus qhia kom deb li deb uas siv cov kab hluav taws xob no). Qee cov ntaub ntawv no xaus rau qhov muaj txiaj ntsig zoo rau LED me me ib yam ntawm no yog kuv lwm lub zog-LED qhia, txheeb xyuas cov ntawv no rau lwm cov ntawv & tswv yimTau kab lus no tau coj tuaj rau koj los ntawm MonkeyLectric thiab Monkey Light tsheb kauj vab teeb.

Kauj ruam 1: Txheej txheem cej luam / Tshooj

Muaj ntau ntau txoj hauv kev tawm rau ua kom muaj zog LED. Vim li cas tag nrho cov fuss? Nws ntog mus rau qhov no: 1) LED tau rhiab heev rau qhov hluav taws xob siv los txhawb lawv (piv txwv li, qhov hloov pauv tam sim no nrog kev hloov pauv me me) 2) Qhov xav tau hloov pauv me ntsis thaum LED tso rau hauv kub lossis cua txias, thiab tseem nyob ntawm qhov xim ntawm LED, thiab cov ntsiab lus tsim khoom.so muaj ntau txoj hauv kev uas LED feem ntau yog siv, thiab kuv yuav hla txhua tus hauv cov kauj ruam hauv qab no.

Qhov project no qhia ntau lub vojvoog rau tsav lub zog LED. rau txhua qhov kev sib tw kuv tau sau tseg ntawm cov kauj ruam cuam tshuam cov ntu uas xav tau suav nrog cov lej uas koj tuaj yeem pom ntawm www.digikey.com. txhawm rau zam kom tsis txhob muaj cov ntsiab lus sib tshooj ntau qhov haujlwm no tsuas yog tham txog cov kev sib txuas tshwj xeeb thiab lawv qhov zoo thiab qhov tsis zoo. kom kawm paub ntau ntxiv txog cov txheej txheem sib dhos thiab nrhiav kom paub LED tus lej thiab qhov twg koj tuaj yeem tau txais lawv (thiab lwm yam ncauj lus), thov xa mus rau ib qho ntawm kuv lwm lub zog LED cov haujlwm.

Kauj Ruam 2: Lub Hwj Huam LED Ua Haujlwm Cov Ntaub Ntawv - Daim Ntawv Qhia Yooj Yim

Hauv qab no yog qee qhov tsis yooj yim ntawm Luxeon LED's uas koj yuav siv rau ntau lub voj voog. Kuv siv cov lej los ntawm cov lus no hauv ntau qhov haujlwm, yog li ntawm no kuv tsuas yog muab lawv tso rau hauv ib qho uas kuv tuaj yeem siv tau yooj yim. Luxeon 1 thiab 3 uas tsis muaj tam sim no (tig-tawm-taw tes): dawb/xiav/ntsuab/ cyan: 2.4V poob (= "LED mus rau qhov hluav taws xob") liab/txiv kab ntxwv/amber: 1.8V poobLuxon-1 nrog 300mA tam sim no: dawb/xiav/ntsuab/cyan: 3.3V poob (= "LED rau pem hauv ntej voltage") liab/txiv kab ntxwv /amber: 2.7V dropLuxeon-1 nrog 800mA tam sim no (tshaj qhov tshwj xeeb): txhua xim: 3.8V poob Luxeon-3 nrog 300mA tam sim no: dawb/xiav/ntsuab/cyan: 3.3V poob/txiv kab ntxwv/amber: 2.5V poob Luxeon-3 nrog 800mA tam sim no: dawb/xiav/ntsuab/cyan: 3.8V poob/txiv kab ntxwv/amber: 3.0V poob (ceeb toom: kuv qhov kev ntsuas tsis pom zoo nrog daim ntawv tshwj xeeb) Luxeon-3 nrog 1200mA tam sim no: liab/txiv kab ntxwv/amber: 3.3V poob (nco ntsoov: kuv qhov kev ntsuas tsis pom zoo nrog daim ntawv tshwj xeeb) Cov txiaj ntsig ib txwm rau "me" LED nrog 20mA yog: liab/txiv kab ntxwv/daj: 2.0 V dropgreen/cyan/blue/purple/white: 3.5V poob

Kauj Ruam 3: Ncaj Ncees

Vim li cas tsis tsuas yog txuas koj lub roj teeb ncaj qha rau LED? Nws zoo li yooj yim heev! Qhov teeb meem yog dab tsi? Kuv puas tuaj yeem ua nws? Qhov teeb meem yog kev ntseeg tau, sib xws & muaj zog. Raws li tau hais, tam sim no dhau los ntawm LED tau nkag siab me me rau qhov hloov pauv me me ntawm qhov hluav taws xob hla LED, thiab tseem mus rau qhov kub ib puag ncig ntawm LED, thiab tseem rau kev tsim khoom sib txawv ntawm LED. Yog li thaum koj tsuas yog txuas koj lub LED rau lub roj teeb koj muaj lub tswv yim me me tias tam sim no muaj ntau npaum li cas los ntawm nws. "Tab sis yog li dab tsi, nws tau teeb, tsis yog?". ok tseeb. nyob ntawm lub roj teeb, koj yuav muaj txoj hauv kev ntau dhau (coj tau kub heev thiab kub hnyiab tawm sai), lossis tsawg dhau (coj yog tsaus). lwm qhov teeb meem yog tias txawm tias cov coj raug cai thaum koj txuas nws thawj zaug, yog tias koj coj nws mus rau ib puag ncig tshiab uas kub dua lossis txias dua, nws yuav ploj zuj zus los yog ci heev thiab hlawv tawm, vim tias cov coj yog kub heev rhiab heev kev tsim cov khoom sib txawv tuaj yeem ua rau muaj qhov hloov pauv tau. Yog li tej zaum koj nyeem tag nrho cov ntawd, thiab koj xav: "yog li cas!" yog tias yog, plow ua ntej thiab txuas sab xis rau lub roj teeb. rau qee daim ntawv thov nws tuaj yeem yog txoj hauv kev mus. rau qhov ua tau zoo siv tau yog LED Throwie. Notes:- yog tias koj siv lub roj teeb, txoj hauv kev no yuav ua haujlwm zoo tshaj plaws siv * roj teeb me me *, vim tias lub roj teeb me me ua zoo li nws muaj sab hauv sab hauv. qhov no yog ib qho laj thawj uas LED Throwie ua haujlwm tau zoo.- yog tias koj xav ua qhov no nrog lub zog-LED ntau dua li 3-feem pua LED, xaiv koj lub roj teeb kom lub zog LED yuav tsis muaj zog tag nrho. qhov no yog lwm qhov laj thawj LED Throwie ua haujlwm zoo li ntawd.

Kauj Ruam 4: Tus Neeg Txom Nyem Resistor

Qhov no yog nyob deb ntawm txoj kev siv dav tshaj plaws rau lub zog LED. Tsuas yog txuas tus tiv thaiv hauv koob nrog koj cov LED (s).pros:- qhov no yog txoj hauv kev yooj yim tshaj plaws uas ua haujlwm ntseeg tau- tsuas yog muaj ib feem- tus nqi pennies (qhov tseeb, tsawg dua li ib npib hauv qhov ntau) qhov tsis zoo:- tsis ua haujlwm tau zoo. koj yuav tsum pauv pauv pov tseg lub zog tiv thaiv zoo ib yam & txhim khu kev qha LED ci. yog tias koj pov tseg lub zog tsawg dua hauv qhov tiv thaiv, koj tau txais tsawg dua qhov ua tau zoo ntawm LED.- yuav tsum hloov tus tiv thaiv kom hloov LED ci ci- yog tias koj hloov lub zog hluav taws xob lossis roj teeb hluav taws xob ntau, koj yuav tsum hloov tus tiv thaiv dua.

Yuav ua li cas nws: Muaj ntau ntau lub vev xaib zoo nyob ntawd twb tau piav qhia txoj hauv kev no. Feem ntau koj xav xam tawm:- tus nqi ntawm tus tiv thaiv yuav siv li cas- txuas koj li kev coj ua hauv kab lossis sib luag Muaj ob qhov zoo "LED laij lej" Kuv pom uas yuav cia koj cia li nkag mus rau qhov tshwj xeeb ntawm koj cov LED thiab lub zog siv, thiab lawv yuav tsim qhov ua tiav series/sib npaug Circuit thiab resistors rau koj! cov laij lej, siv Lub Hwj Chim LED Cov Ntaub Ntawv Siv Cov Lus Qhia rau tus lej tam sim no thiab qhov ntsuas hluav taws xob tus lej laij lej nug koj rau. yog tias koj tab tom siv cov txheej txheem tiv thaiv nrog lub zog LED, koj yuav xav tau sai sai ntawm ntau lub zog pheej yig resistors! Nov yog qee qhov pheej yig los ntawm digikey: "Yageo SQP500JB" yog 5-watt resistor series.

Kauj Ruam 5: $ tus tswj hwm kev ua phem

Hloov cov tswj hwm, aka "DC-to-DC", "phaw" lossis "txhawb nqa" cov hloov pauv, yog txoj hauv kev zoo rau lub zog LED. lawv ua txhua yam, tab sis lawv muaj nqi. lawv yog dab tsi "ua" raws nraim? tus tswj kev hloov pauv tuaj yeem yog nqis qis ("phaw") lossis nce qib ("txhawb") lub zog siv hluav taws xob nkag mus rau qhov ntsuas hluav taws xob xav tau kom muaj zog rau LED. tsis zoo li tus tiv thaiv nws tas li saib xyuas LED tam sim no thiab hloov kho kom nws tsis tu ncua. Nws ua txhua yam no nrog 80-95% kev siv hluav taws xob, tsis muaj teeb meem ntau npaum li cas cov kauj ruam-nqis lossis nce qib yog. Pros:-kev ua haujlwm zoo ib yam rau LED ntau yam thiab cov khoom siv hluav taws xob- ua haujlwm siab, feem ntau 80-90% rau txhawb kev hloov pauv thiab 90-95% rau cov hloov pauv hloov pauv- tuaj yeem ua lub zog LED los ntawm ob qho qis lossis siab dua cov khoom siv hluav taws xob (nce qib lossis nqis qis)-qee cov koog tuaj yeem kho LED ci ci- ntim cov khoom tsim los rau lub zog-LED muaj thiab yooj yim kom siv Cons:- nyuaj thiab kim: feem ntau kwv yees li $ 20 rau ib chav ntim khoom. - ua koj tus kheej xav tau ob peb ntu thiab txuj ci kev tsim hluav taws xob.

Ib lub cuab yeej tawm ntawm lub txee tsim tshwj xeeb rau lub hwj chim coj yog Buckpuck los ntawm LED Dynamics. Kuv tau siv ib qho ntawm no hauv kuv qhov project-coj lub taub hau teeb thiab zoo siab heev nrog nws. cov cuab yeej no muaj los ntawm feem ntau ntawm LED cov khw muag khoom lub vev xaib.

Kauj Ruam 6: Cov Khoom Tshiab !! Qhov Chaw Tam Sim No #1

cia mus rau cov khoom tshiab! Thawj txheej ntawm cov khoom siv hluav taws xob yog txhua qhov kev hloov pauv me me ntawm qhov yooj yim super-qhov tam sim no qhov chaw. Pros:- kev ua haujlwm zoo ib yam nrog txhua lub zog siv thiab LED's- tus nqi kwv yees li $ 1- tsuas yog 4 ntu yooj yim los txuas- kev ua tau zoo tuaj yeem siab dua 90% (nrog xaiv LED thiab xaiv lub zog)- tuaj yeem tswj LOTS ntawm lub zog, 20 Amps lossis ntau dua tsis muaj teeb meem.- qis "tso tawm"- qhov hluav taws xob nkag tuaj yeem tsawg li 0.6 volts siab dua qhov tso zis hluav taws xob.- super-dav ua haujlwm ntau: nruab nrab ntawm 3V thiab 60V inputCons:- yuav tsum hloov tus tiv thaiv kom hloov LED ci ci- yog teeb tsa tsis zoo nws yuav nkim lub zog ntau npaum li cov txheej txheem tiv thaiv- koj yuav tsum tsim nws koj tus kheej (huag tos, uas yuav tsum tau yog 'pro').- qhov txwv tam sim no hloov pauv me ntsis nrog qhov ntsuas kub ib puag ncig (kuj tseem yuav yog 'pro'). Yog li txhawm rau suav nws: qhov Circuit no ua haujlwm ib yam nkaus nrog rau kev nqis tes hloov pauv tus tswj, qhov sib txawv tsuas yog tias nws tsis tau lees tias 90% kev ua tau zoo. ntawm sab ntxiv, nws tsuas yog them $ 1.

Qhov yooj yim tshaj plaws ua ntej: "Tus Nqi Them Nqi Tam Sim No #1" Cov kab hluav taws xob no tau tshwj xeeb hauv kuv qhov haujlwm yooj yim-coj teeb pom kev zoo. Nws ua haujlwm li cas?- Q2 (lub zog NFET) tau siv los ua qhov hloov pauv. Q2 pib tawm los ntawm R1.- Q1 (NPN me me) tau siv los ua qhov hloov pauv tam sim no, thiab R3 yog "kev tiv thaiv kev xav" lossis "teeb tsa resistor" uas ua rau Q1 thaum ntau dhau tam sim no ntws. lub ntsiab tam sim no ntws los ntawm LED's, dhau Q2, thiab dhau R3. Thaum ntau dhau tam sim no ntws los ntawm R3, Q1 yuav pib qhib, uas pib tua Q2. Tig tawm Q2 txo qhov tam sim no los ntawm LED's thiab R3. Yog li peb tau tsim "cov lus tawm tswv yim", uas txuas ntxiv saib xyuas LED tam sim no thiab ua kom raws nraim ntawm qhov teeb tsa txhua lub sijhawm. transistors yog ntse, huh!- R1 muaj kev tiv thaiv siab, yog li thaum Q1 pib tig rau, nws yooj yim kov yeej R1.- Qhov tshwm sim yog tias Q2 ua zoo li tus tiv thaiv, thiab nws qhov kev tiv thaiv yeej ib txwm ua tau zoo kom ua kom LED tam sim no raug. Txhua lub hwj chim tshaj tau hlawv hauv Q2. Yog li rau qhov ua tau zoo tshaj plaws, peb xav teeb tsa peb txoj hlua LED kom nws nyob ze rau lub zog hluav taws xob. Nws yuav ua haujlwm zoo yog tias peb tsis ua qhov no, peb yuav tsuas yog siv lub zog. qhov no tsuas yog qhov poob qis ntawm qhov kev sib piv no piv rau cov kauj ruam-nqis hloov pauv tus tswj! teeb tsa tam sim no! tus nqi ntawm R3 txiav txim siab teeb tsa tam sim no. Kev suav:- LED tam sim no yog kwv yees li sib npaug: 0.5 / R3- R3 zog: lub zog dissipated los ntawm tus tiv thaiv yog kwv yees li: 0.25 / R3. xaiv tus nqi tiv thaiv tsawg kawg 2x lub zog suav kom lub resistor tsis hlawv kub.so rau 700mA LED tam sim no: R3 = 0.5 / 0.7 = 0.71 ohms. tus qauv tiv thaiv ze tshaj yog 0.75 ohms. R3 zog = 0.25 / 0.71 = 0.35 watts. peb yuav xav tau yam tsawg 1/2 watt rated resistor. Parts siv: R1: me me (1/4 watt) kwv yees li 100k-ohm resistor (xws li: Yageo CFR-25JB series) R3: loj (1 watt+) teeb tsa tam sim no resistor. (qhov zoo 2-watt xaiv yog: Panasonic ERX-2SJR series) Q2: loj (TO-220 pob) N-channel logic-level FET (xws li: Fairchild FQP50N06L) Q1: me me (TO-92 pob) NPN transistor (xws li: Fairchild 2N5088BU) Cov kev txwv ntau tshaj: tsuas yog txwv tiag rau qhov tam sim no Circuit Court tau yuam los ntawm NFET Q2. Q2 txwv qhov Circuit hauv ob txoj hauv kev: 1) lub zog tawm mus. Q2 ua raws li qhov sib txawv resistor, nqis qis qhov hluav taws xob los ntawm lub zog xa khoom kom haum rau qhov xav tau ntawm LED's. yog li Q2 yuav xav tau lub rhaub dej kub yog tias muaj lub siab LED tam sim no lossis yog tias lub zog hluav taws xob qhov hluav taws xob ntau dua li cov hlua hluav taws xob LED. (Q2 lub zog = poob qis * LED tam sim no). Q2 tsuas tuaj yeem siv 2/3 watt ua ntej koj xav tau qee yam ntawm cov rhaub dej kub. nrog lub rhaub dej loj, lub tshuab hluav taws xob no tuaj yeem siv LOT ntawm lub zog & tam sim no - tej zaum 50 watts thiab 20 amps nrog qhov tseeb transistor, tab sis koj tuaj yeem cia li tso ntau lub transistors ua ke rau ntau lub zog. 2) qhov hluav taws xob. tus "G" tus pin ntawm Q2 tsuas yog ntsuas rau 20V, thiab nrog qhov yooj yim tshaj plaws Circuit Court uas yuav txwv qhov ntsuas hluav taws xob rau 20V (cia hais tias 18V kom nyab xeeb). yog tias koj siv NFET sib txawv, nco ntsoov txheeb xyuas "Vgs" kev ntsuas.thermal rhiab heev: qhov teeb tsa tam sim no yog me ntsis rhiab rau qhov kub. qhov no yog vim tias Q1 yog qhov ua rau, thiab Q1 yog qhov sov sov. ib feem nuber kuv tau teev tseg saum toj no yog ib qho ntawm qhov tsis tshua muaj cua sov NPN qhov kuv tuaj yeem pom. Txawm li cas los xij, cia siab tias yuav txo qis 30% hauv qhov teeb tsa tam sim no thaum koj mus ntawm -20C txog +100C. uas yuav yog qhov xav tau, nws tuaj yeem txuag koj li Q2 lossis LED los ntawm kev ua kom sov.

Kauj Ruam 7: Qhov Tam Sim No Tau Txais Tweaks: #2 thiab #3

cov kev hloov pauv me me ntawm Circuit #1 hais txog qhov txwv qhov hluav taws xob ntawm thawj Circuit Court. peb yuav tsum khaws NFET Gate (G tus pin) qis dua 20V yog tias peb xav siv lub zog loj dua 20V. nws hloov tawm peb kuj xav ua qhov no yog li peb tuaj yeem cuam tshuam qhov Circuit Court no nrog lub microcontroller lossis computer.

hauv Circuit #2, kuv ntxiv R2, thaum nyob #3 kuv hloov R2 nrog Z1, zener diode. Circuit #3 yog qhov zoo tshaj plaws, tab sis kuv suav nrog #2 vim nws tau nrawm nrawm yog tias koj tsis muaj tus nqi raug ntawm zener diode. peb xav teeb G -pin voltage txog 5 volts - siv 4.7 lossis 5.1 volt zener diode (xws li: 1N4732A lossis 1N4733A) - qis dua thiab Q2 yuav tsis tuaj yeem tig txhua txoj hauv kev, siab dua thiab nws yuav tsis ua haujlwm nrog feem ntau microcontrollers. Yog tias koj qhov hluav taws xob nkag qis dua 10V, hloov R1 rau 22k-ohm resistor, zener diode tsis ua haujlwm tshwj tsis yog muaj 10uA hla nws. tom qab qhov kev hloov kho no, lub Circuit Court yuav ua haujlwm 60V nrog cov ntu tau teev tseg, thiab koj tuaj yeem pom qhov siab dua Q2 yooj yim yog xav tau.

Kauj Ruam 8: Me Me Ua Rau Txhua Qhov Sib Txawv

Tam sim no yog dab tsi? txuas rau lub micro-maub los, PWM lossis khoos phis tawj! koj lub micro-maub los yog 3.3V lossis tsawg dua, koj yuav tsum siv Circuit #4, thiab teeb tsa koj lub micro-maub los tswj tus pin kom "qhib tus neeg khaws khoom"-uas tso cai rau micro rub tus pin, tab sis cia R1 resistor rub nws mus txog 5V uas xav tau kom ua tiav Q2.if koj lub micro yog 5V, tom qab ntawd koj tuaj yeem siv qhov yooj yim Circuit #5, ua tam sim ntawd nrog Z1, thiab teeb tsa lub micro tus pin tso tawm kom zoo ib yam rub-up/rub-down hom - 5V micro tuaj yeem tig rau Q2 zoo xwb los ntawm nws tus kheej. Ntau koj tau txais PWM lossis micro txuas, koj yuav ua li cas tswj lub teeb digital? txhawm rau hloov qhov ci ntawm koj lub teeb, koj "PWM" nws: koj ntsais muag nws tawm thiab nrawm (200 Hz yog qhov nrawm), thiab hloov qhov sib piv ntawm lub sijhawm mus rau lub sijhawm-qhov no tuaj yeem ua tiav nrog ob peb kab ntawm cov cai hauv micro-maub los. ua nws siv tsuas yog '555' nti, sim qhov Circuit no. kom siv qhov kev sib tw tshem tawm M1, D3 thiab R2, thiab lawv Q1 yog peb Q2.

Kauj Ruam 9: Lwm Txoj Kev Dimming

ok, yog li tej zaum koj tsis xav siv lub microcontroller? Nov yog lwm qhov kev hloov pauv yooj yim ntawm "Circuit #1"

txoj hauv kev yooj yim tshaj plaws kom dim lub LED yog hloov qhov teeb tsa tam sim no. yog li peb yuav hloov R3! qhia hauv qab no, kuv ntxiv R4 qhov hloov pauv nrog R3. yog li nrog qhov qhib qhib, tam sim no tau teeb tsa los ntawm R3, nrog qhov hloov pauv kaw, tam sim no tau teeb tsa los ntawm tus nqi tshiab ntawm R3 ua ke nrog R4 - ntau dua tam sim no. yog li tam sim no peb tau txais "lub zog siab" thiab "lub zog qis" - zoo meej rau lub teeb nyem. tej zaum koj yuav xav tso qhov sib txawv-resistor hu rau R3? Hmoov tsis zoo, lawv tsis ua rau lawv nyob rau hauv qhov kev tiv thaiv qis, yog li peb xav tau qee yam nyuab dua los ua qhov ntawd. (saib Circuit #1 rau kev xaiv qhov kev tivthaiv qhov tseem ceeb li cas)

Kauj Ruam 10: Tus Tsav Tsheb Hloov Kho Analog

Qhov Circuit Court no tso cai rau koj kho qhov ci ci, tab sis tsis siv microcontroller. Nws yog tag nrho analog! nws raug nqi me ntsis ntxiv - kwv yees li $ 2 lossis $ 2.50 tag nrho - kuv vam tias koj yuav tsis mloog. Qhov sib txawv tseem ceeb yog NFET tau hloov pauv nrog tus tswj hwm qhov hluav taws xob. cov ntsuas hluav taws xob cov kauj ruam-nqis cov tswv yim hluav taws xob zoo ib yam li NFET tau ua, tab sis nws tau tsim los kom nws qhov hluav taws xob tso tawm tau teeb tsa los ntawm kev sib piv ntawm ob tus tiv thaiv (R2+R4, thiab R1). raws li ua ntej, hauv qhov xwm txheej no nws txo qis qhov kev tiv thaiv hla R2, txo qis qhov tso tawm ntawm qhov ntsuas hluav taws xob. Qhov Circuit no cia koj teeb qhov hluav taws xob ntawm LED rau txhua tus nqi uas siv tus lej lossis tus swb, tab sis nws tseem txwv LED tam sim no ua ntej li ntawd koj tsis tuaj yeem tig lub xov tooj dhau los ntawm qhov chaw nyab xeeb. Kuv siv lub voj voog no hauv kuv RGB Xim Chaw Tswj Chaw/Chaw teeb pom kev zoo.thov saib cov phiaj xwm saum toj no rau ib feem lej thiab tus tiv thaiv tus nqi xaiv. qhov Circuit no tuaj yeem ua haujlwm nrog qhov hluav taws xob nkag los ntawm 5V mus rau 28V, thiab mus txog 5 amps tam sim no (nrog lub rhaub dej kub ntawm tus tswj hwm)

Kauj Ruam 11: Ib qho * txawm tias yooj yim dua * Cov peev txheej tam sim no

ok, yog li nws hloov tawm muaj txoj hauv kev yooj yim dua los ua qhov tam sim no-qhov chaw. yog vim li cas kuv tsis tso nws ua ntej yog tias nws muaj tsawg kawg ib qhov teeb meem tseem ceeb ib yam.

Qhov no tsis siv NFET lossis NPN transistor, nws tsuas yog muaj ib qho Voltage Regulator nkaus xwb. Piv rau yav dhau los "qhov yooj yim tam sim no" siv ob lub transistors, qhov Circuit Court no muaj: - txawm tias tsawg dua. - ntau dua "tso tawm" ntawm 2.4V, uas yuav txo qis kev ua haujlwm thaum ua haujlwm tsuas yog 1 LED. yog tias koj tab tom ua txoj hlua ntawm 5 LED's, tej zaum tsis yog qhov teeb meem loj. - tsis muaj kev hloov pauv tam sim no -taw tes thaum hloov pauv kub - muaj peev xwm tsawg dua (5 amps - tseem txaus rau ntau LED)

yuav siv nws li cas: resistor R3 teeb tsa qhov tam sim no. cov mis yog: LED tam sim no hauv amps = 1.25 / R3 yog li rau qhov tam sim no ntawm 550mA, teeb R3 rau 2.2 ohms koj yuav xav tau lub zog tiv thaiv feem ntau, R3 zog hauv watts = 1.56 / R3 Circuit Court no tseem muaj qhov tsis zoo uas tsuas yog txoj hauv kev siv nws nrog tus tswj hwm micro lossis PWM yog tig tag nrho txhua yam rau thiab tawm nrog lub zog FET. thiab tib txoj hauv kev los hloov lub teeb ci ci LED yog hloov R3, yog li xa mus rau cov phiaj xwm yav dhau los rau "Circuit #5" uas qhia ntxiv qhov hloov pauv qis/siab zog hauv. regulator pinout: ADJ = pin 1 OUT = pin 2 IN = tus pin 3 ntu: tus tswj hwm: LD1585CV lossis LM1084IT-ADJ capacitor: 10u txog 100u capacitor, 6.3 volt lossis ntau dua (xws li: Panasonic ECA-1VHG470) resistor: 2-watt resistor yam tsawg (xws li: Panasonic ERX-2J series) koj tuaj yeem tsim qhov no nrog ntau yam zoo ib yam li cov ntsuas hluav taws xob tawm, ob qhov teev tseg muaj qhov ua tau zoo thiab tus nqi. qhov qub "LM317" yog pheej yig, tab sis kev tso tawm txawm tias siab dua - 3.5 volts tag nrho hauv hom no. tam sim no muaj ntau qhov kev tswj hwm saum npoo nrog qhov qis qis qis rau kev siv qis tam sim no, yog tias koj xav tau lub zog 1 LED los ntawm roj teeb cov no tuaj yeem tsim nyog saib.

Kauj ruam 12: Haha! Muaj Txoj Kev Yooj Yim Yooj Yim

Kuv txaj muag hais tias kuv tsis xav txog txoj hauv kev no kuv tus kheej, kuv tau kawm nws thaum kuv tshem lub teeb nyem uas muaj lub teeb ci ci LED sab hauv.

-------------- Muab PTC resistor (aka a "PTC resettable fuse") ua ke nrog koj LED. wow.tsis tau yooj yim dua qhov ntawd. --------------- ok hehehehe Txawm hais tias yooj yim, txoj hauv kev no muaj qee qhov tsis zoo: - Koj lub zog tsav tuaj yeem tsuas yog siab dua me ntsis ntawm LED "ntawm" qhov hluav taws xob. Qhov no vim tias PTC fuses tsis tau tsim los tshem tawm cov cua sov ntau heev yog li koj yuav tsum ua kom cov hluav taws xob poob qis thoob PTC ncaj ncees tsawg. koj tuaj yeem lo koj lub ptc rau phaj hlau los pab me ntsis. - Koj yuav tsis tuaj yeem tsav koj lub LED ntawm nws lub zog siab tshaj plaws. PTC fuses tsis muaj qhov tseeb "mus" tam sim no. Feem ntau lawv sib txawv los ntawm qhov tseem ceeb ntawm 2 los ntawm qhov ntsuas mus ncig. Yog li, yog tias koj muaj LED xav tau 500mA, thiab koj tau txais PTC ntsuas ntawm 500mA, koj yuav xaus nrog txhua qhov chaw ntawm 500mA txog 1000mA - tsis muaj kev nyab xeeb rau LED. Qhov kev nyab xeeb nkaus xwb ntawm PTC yog qhov ntsuas qis me ntsis. Tau txais 250mA PTC, tom qab ntawv koj qhov phem tshaj yog 500mA uas LED tuaj yeem ua tau. ----------------- Piv txwv: Rau ib qho LED ntsuas txog 3.4V thiab 500mA. Txuas hauv kab nrog PTC ntsuas txog 250 mA. Tsav tsheb yuav tsum muaj txog 4.0V.