USB Floodlight: 4 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

Qhov no tau pib tawm los ua ib qho kev coj ua hauv SMD (cov cuab yeej siv sab saum toj) cov khoom siv rau ntawm cov qauv txheej txheem, thiab ua rau pom lub teeb pom kev zoo USB-dej nyab lub teeb, zoo rau mus pw hav zoov lossis teeb pom kev zoo.

Feem ntau cov teeb pom kev zoo niaj hnub muaj nyob hauv sab hauv SMD LED chips. Cov chips no tau tsim ua ntau, pheej yig heev thiab muaj rau cov nyiam ua haujlwm ntawm tus nqi qis heev. Kuv yuav 200 ntawm 5730 hom rau 1 EURO. Tus lej 4 tug lej qhia lawv qhov loj me: 5.7x3.0mm. Lawv tau ntsuas rau 0.5W (~ 140mA ntawm 3.5V) txhua, txawm hais tias lawv yuav xav tau lub rhaub dej kub kom ua haujlwm tsis tu ncua ntawm lub zog ntawd. Tsis muaj lub rhaub dej kub, lawv yuav tsum tau khiav ntawm qhov qis dua tam sim no, lossis tuaj yeem ua haujlwm nyob rau hauv hom pulsed ntawm tag nrho tam sim no, piv txwv li hauv multiplexed lossis stroboscopic hom.

Cov lus qhia no qhia yuav ua li cas thiaj ua USB-dej nyab lub teeb, tab sis tus nqi qis thiab qhov me me txhais tau tias lawv tuaj yeem siv rau ntau lwm daim ntawv thov, xws li DIY 7-ntu ntu qhia, teeb pom kev zoo, teeb pom kev zoo, projectors, teeb duab rooj lossis kev cai teeb pom kev zoo daws teeb meem.

Txheem USB lub txhab nyiaj fais fab xa 5V 1A, thiab qhov loj dua tuaj yeem xa 2A. Tus qauv tsim tawm ntawm no yog rau 1A, yog li nws yuav ua haujlwm hauv ib lub txhab nyiaj, tab sis los ntawm ob npaug ntawm cov lej LED koj tuaj yeem ua ib qho rau 2A.

Kauj ruam 1: Txoj kev xav

Tsis zoo li lub teeb ci qub qub, qhov poob qis ntawm LED yog nyob ntawm qhov me me ntawm qhov tam sim no. Qhov poob qis rau qhov siab tam sim no dawb LEDs mus los ntawm ~ 3.0V ntawm cov dej ntws ~ 10mA txog ~ 3.5V ntawm 100mA. Yog li lawv tsis tuaj yeem txuas ncaj qha rau 5V xa los ntawm USB lub txhab nyiaj fais fab. Txoj kev daws teeb meem yooj yim tshaj plaws yog txhawm rau txuas txhua LED hauv kab nrog cov tiv thaiv. Tus nqi ntawm tus tiv thaiv no txiav txim siab tam sim no los ntawm LED, thiab yog li qhov ci ci. Qhov tseeb tam sim no ntawm LED nrog resistor nyuaj rau suav, tab sis yooj yim kwv yees, thiab ncaj qha ntsuas.

Piv txwv li, 1 kOhm resistor hauv koob nrog LED dawb yuav txhais tau tias tam sim no qis heev, yog li qhov hluav taws xob poob qis ntawm LED yog ~ 2.9V, tawm 2.1V hla tus tiv thaiv, thiab yog li tam sim no ntawm 2.1mA los ntawm resistor, thiab tib 2.1mA los ntawm LED. 100 Ohm resistor yuav ua rau 21 mA yog tias qhov hluav taws xob poob ntawm LED yuav nyob 2.9V, tab sis nws zoo li yuav nce mus rau 3.0V, tawm 'tsuas yog' 2.0V hla tus tiv thaiv thiab yog li 20mA los ntawm LED. Nrog 10 Ohm resistor, tam sim no yuav yog 200mA yog tias LED qhov poob qis yog 3.0V, tab sis nws zoo li yuav nce mus rau 3.4V, thiab qhov seem 1.6V poob ntawm tus tiv thaiv muab tam sim no ntawm 160 mA, uas yog me ntsis saum toj no nominal tam sim no.

Yog li koj yuav xav tias ua kom lub teeb muaj zog los ntawm 5V 1A cov khoom siv, nws yuav txaus los tso ua ke 6 lossis 7 0.5W LEDs, txhua tus nrog 10 Ohm series resistor. Txhua LED yuav siv 160mA*3.4V = 0.54W thiab txhua tus tiv thaiv 160mA*1.5V = 0.24W. Qhov ntawd ze rau qhov tshwj xeeb rau LED thiab hauv qhov tshwj xeeb rau 1/4W resistor. Tab sis yog tias koj sim qhov no koj yuav pom tias ob qho tib si LED thiab tus tiv thaiv tau kub heev (~ 100C). Txawm tias ntau dua yog tias koj tso tag nrho cov khoom no ze rau ib leeg. Tshwj tsis yog lub rhaub dej kub thiab kiv cua tau siv, lawv yuav tuag, thiab tsim cov pa luam yeeb ntau nyob hauv tus txheej txheem.

Yog li kuv tau sim cov teeb tsa hauv qab no:

10 LEDs nrog 22 Ohm series resistors. Kuv ntsuas 1.4V poob ntawm cov neeg tawm tsam, yog li tam sim no yog 64mA ib LED, 0.64A tag nrho. Nrog cov LEDs thiab cov tiv thaiv tiv thaiv los ntawm nws tau kub heev uas nws mob ntawm kev kov, tab sis nws tsis yaj los yog hlawv thiab nws yog lub teeb pom kev zoo rau siv qee zaum.

24 LEDs nrog 47 Ohm series resistors. Kuv ntsuas 1.7V poob ntawm cov neeg tawm tsam, yog li tam sim no yog 36mA ib LED, 0.86A tag nrho. Tej yam ua kom sov tom qab qee lub sijhawm. Qhov txaus siab, cov neeg tawm tsam xav tias kub dua li cov LEDs, txawm tias siv zog ntau dua thiab ua kom me dua. Tej zaum yog LEDs tswj kom tawg tawm ib feem loj ntawm lawv lub zog ua lub teeb? Kuv yuav tsis siv nws hauv tsev pheeb suab ntaub vim qhov kub tau mus txog tuaj yeem ua rau mob thiab tuaj yeem nce mus rau qib txaus ntshai yog tias raug npog.

40 LEDs nrog 100 Ohm series resistors. Kuv ntsuas 1.9V poob ntawm cov neeg tawm tsam, yog li tam sim no yog 19mA rau ib qho LED, 0.76A tag nrho. Nws tau txais qhov sov sov, tab sis twv yuav raug hu tsis kub. Qhov no ua rau lub teeb zoo, zoo ib yam li 3W LED teeb (lossis 30W lub teeb roj teeb). Muaj txiaj ntsig zoo rau kev yees duab ntawm cov khoom me me, ua kom muag lossis kho cov haujlwm, tab sis kuj teeb pom kev BBQ lossis teeb pom kev kub ntxhov hauv tsev, ntawm txoj kev lossis ntawm chaw pw hav zoov.

Kauj Ruam 2: Cov Cheeb Tsam Xav Tau

Cov lus qhia yog rau 40 LED vaj huam sib luag nrog 100 Ohm series resistors, uas kuv xav tias yog qhov ci tshaj plaws thiab nyab xeeb tshaj plaws. Qhov ua tiav tag nrho coj kuv li ib teev mus rau qhov muag, tab sis lees paub tias yog tom qab kuv tau txais qee qhov kev paub dhau los thiab qee qhov kev ntseeg siab nrog ob qho ntxiv ntawm pawg thawj coj saib.

Cov khoom siv xav tau (Tus nqi tag nrho: tsawg dua 1 euro yog tias yuav hauv ib nrab)

• 40 dawb SMD '5730' LEDs
• 40 100 Ohm resistors, 1/4W
• 1 5x7cm pawg thawj coj saib. Ib sab, 18x24 qhov.
• 1 txiv neej USB txuas.

Cov cuab yeej: cov laug cam, cov laug, tus tweezers.

LEDs muaj polarity. Los ntawm qhov deb lawv lub ntsej muag yuav zoo li sib npaug, tab sis ntawm kev tshuaj xyuas ze koj yuav pom ntau qhov sib txawv. Qhov muaj txiaj ntsig tshaj plaws yog nyob rau sab daj pem hauv ntej: muaj qhov oval ntu uas tau teeb pom kev zoo, tab sis ib sab muaj cov kab ntxiv. Qhov ntawd yog qhov tsis zoo, ib yam li rau diodes, electrolytic capacitors thiab lwm yam.

Kauj Ruam 3: Cov Lus Qhia Hauv Tsev

Pib 40 tso blobs ntawm cov laug ntawm qhov chaw uas LEDs txuas rau hauv av. Tom ntej no, muab cov kab hluav taws xob LED tso nrog lawv qhov rho tawm ntawm lub qhov muag muag: tuav lub LED nrog tus tweezers, yaj cov kab laug sab thiab hloov LED mus rau hauv cov kua blob. Nco ntsoov tias lub qhov nyob rau sab ntxiv ntawm LED muaj qee qhov chaw tso rau hauv kom tso cov resistor coj los ntawm.

Ib qho los ntawm ib qho, nce tus tiv thaiv sab nraub qaum ntawm lub rooj tsavxwm, ua raws cov qauv ib txwm muaj hauv daim duab. Solder ib sab rau ntxiv rau ntawm LED, thiab lwm sab mus rau nruab nrab ntawm pawg thawj coj saib. Txiav tawm cov kev coj ua dhau ntawm sab hauv av, tab sis tso lawv ntawm sab ntxiv.

Thaum kawg, txuas ua ke kuj yog txhua qhov kev coj ua ntxiv. Tam sim no yog lub sijhawm zoo los sim yog tias txhua lub LEDs ua haujlwm. Kuv pom tias nrog cov ntsuas ntsuas teeb tsa hauv 200 Ohm teeb tsa, LEDs teeb pom kev me ntsis, tab sis qhov txawv txaus kom pom yog tias ib qho tsis txuas nrog zoo. Siv qee qhov ua dhau los txhawm rau txuas txhua lub ntsiab lus ntawm ob txoj kab nqes ua ke.

Tam sim no txuas tus USB txuas. Kuv muab plaub lub blobs ntawm cov laug thiab siv tag nrho plaub tus pin rau ntawm lub rooj tsavxwm, kom lub txuas txuas tau ruaj ntseg zoo rau lub rooj tsavxwm. Pom los ntawm saum toj no, tus pin sab laug yog ntxiv rau thiab tus lej tus lej raug rho tawm, thiab yuav tsum txuas nrog rau txoj kab sib txuas. Ob lub hauv paus pins yog rau cov ntaub ntawv thiab yog li tsis siv. Kev txuas mus rau txoj kev tsheb nqaj hlau sab laug yuav tsum mus los ntawm sab nraub qaum kom nws hla hla txoj kev tsheb nqaj hlau ntxiv hauv nruab nrab. Tam sim no koj tuaj yeem sim nws ntawm lub txhab nyiaj thiab yog tias txhua yam teeb pom kev zoo koj tau ua tiav!

Kauj Ruam 4: Kev Ua Tau Zoo

Nws yog lub npe tsis yooj yim los qhia tias lub teeb muaj zog npaum li cas: qhov pom ntawm lub koob yees duab yees duab txhais tau tias lub zog muaj zog dua, tsawg dua yuav raug. Cov duab coj los ntawm kev ua tau zoo ntawm 'lub teeb taws tsis txaus ntseeg' yog qhov tsis txaus ntseeg. Txawm li cas los xij, kuv xav tias daim duab saum toj no muab lub tswv yim ncaj ncees: nyob ze nws zoo nkauj heev, tab sis nws tseem pom kev zoo ob peb metres deb. Daim ntawv ceeb toom kuj tias qhov pom kev yog homogeneous heev, txij li cov SMD LEDs, tsis sib xws rau acrylic LEDs, tsis muaj lub tsom iav.

Qhov kawg tab sis tsis kawg, yog tias koj nyiam cov lus qhia no, thov txiav txim siab pov npav rau nws ntawm qhov 'Ua kom nws ci' kev sib tw!