LED Teeb Dimmer: 3 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:25

Nov yog qhov yooj yim LED teeb lub teeb dimmer. Koj tuaj yeem pom yuav ua li cas lub Circuit Court ua haujlwm hauv video.

Kuv tuaj nrog lub tswv yim no tom qab nyeem cov kab lus hauv qab no:

www.instructables.com/id/LM350-Power-Supply/

www.instructables.com/id/Transistor-Light-Dimmer/

Hauv tsab xov xwm no hom transistors siv sib txawv. Ib tus yog NPN thiab lwm tus yog PNP. Tsis tas li, tus sau tau siv ob lub transistors. Kuv txo tus nqi hluav taws xob mus rau tsuas yog ib qho transistor thiab kuv lub Circuit Court yog kab ntau dua li qhov tau hais hauv kab lus saum toj no.

Txawm li cas los xij, lwm txoj hauv kev pheej yig dua tau qhia ntawm no:

www.instructables.com/id/Transistor-LED-Dimmer/

Khoom siv

Qhov Chaw: Lub Hwj Chim Transistors - 2 lossis 1 lub zog thiab 1 lub hom phiaj dav dav transistor (ob lub transistors yuav tsum yog BJT thiab ntawm tib hom tib yam (piv txwv li NPN/PNP)), Cov Dej Kub Kub, 1 kohm resistor - 1,, 2.2 ohm siab zog resistor - 2, cov xov hlau, lub rooj sib txig sib luag lossis daim npav daim npav, lub teeb pom kev (6 V/12 VLED lub teeb, 6 V/12 V lub teeb pom kev zoo ib txwm lossis LED ci), lub zog siv (AA/AAA/C/D roj teeb/lub zog siv), lub teeb tuav.

Cov cuab yeej: xaim hluav taws xob stripper, pliers, ntsia hlau tsav, lub qhov puncher.

Yeem qhov chaw: 10 kohm lossis 100 kohm resistor - 1,1 mm hlau xaim.

Yeem cov cuab yeej: Ntau lub ntsuas, Voltmeter.

Kauj ruam 1: Tsim Circuit Court

Muaj lub teeb dimmer nrog kev tswj cov tswv yim qhia hauv qhov txuas no:

hackaday.io/page/8806-transistor-light-dimmer

Oscillation lub teeb dimmers muaj txiaj ntsig ntau dua tab sis nyuaj rau siv:

www.instructables.com/id/Oscillator-LED-Dimmer/

www.instructables.com/id/Oscillator-LED-Dimmer-1/

Kuv tsim cov Circuit nrog ob BJT PNP transistors. Koj tuaj yeem ua tib lub Circuit Court nrog ob lub NPN transistors.

Thawj lub transistor yog qhov ntsuas hluav taws xob ua raws kev teeb tsa. Qhov hluav taws xob emitter ntawm thawj transistor Q1 yog kwv yees li 0.7 V siab dua qhov pib qhov hluav taws xob. Yog li los ntawm kev hloov pauv qhov sib txawv resistor Kuv tab tom tswj Q2 transistor cov tswv yim tam sim no.

Thaum Q1 transistor tso hluav taws xob ntau tshaj li 5.3 V, Q2 transistor dhau los ua kev sib txuas thiab qhov no yog dab tsi Re1, 10 kohm yeem xaiv resistor yog rau. Koj tsis xav tau tiag tiag. Koj tuaj yeem siv 100 kohm resistor hloov.

2.2 ohm resistors kuj tseem xaiv tau. Lawv tau siv rau kev tiv thaiv hluav taws xob luv luv tiv thaiv Circuit Court, yog tias koj ua yuam kev luv lub teeb qhov muag teev. Txawm li cas los xij, lawv tsis yog kev tiv thaiv zoo tshaj tiv thaiv luv Circuit Court.

Xam qhov tsawg kawg tam sim no nce ntawm Q2 transistor los xyuas kom meej:

Beta2Min = Ic2 / Ib2 = Ic2Max / ((Vs - Vbe1 - Vbe2) / Rb2)

= 0.3 A / ((6 V - 2 * 0.7 V) / 1, 000 ohms) = 65.2173913043

Qhov tam sim no tau txais txiaj ntsig yog 100 thiab qhov nce tam sim no tuaj yeem poob tus nqi tsawg kawg ntawm 20 ntawm qee qhov tso tawm tam sim no lossis kub. Txawm li cas los xij, kuv tus nqi hluav taws xob luv Circuit Court. Tsis tas li, Nws tsis zoo li thiab LED lub teeb yuav siv ntau li 300 mA. Qhov tam sim no yog kev noj haus yog ib txwm siv rau cov iav qub qub uas muaj qhov muag. Qhov siab tshaj plaws LED qhov tam sim no tuaj yeem tsuas yog txog 100 mA. Koj tuaj yeem hloov lub teeb ci LED nrog lub teeb ci me me uas siv qhov siab tshaj plaws tam sim no ntawm 20 mA. Txawm li cas los xij, tom qab ntawd koj tuaj yeem siv qhov pheej yig dua ib qho Circuit Court transistor los ntawm nplooj ntawv dhau los ntawm kab lus no:

www.instructables.com/id/Transistor-LED-Dimmer/

Kauj ruam 2: Ua Circuit Court

Kuv siv cov hlau txuas tsuas yog txuas cov xov hlau mus rau lub zog transistor. Kuv ntswj cov xov hlau thiab cov ceg tiv thaiv nrog cov pliers, yog li zam kev siv tshuaj yaj yeeb.

Tsuas yog 2.2 ohm resistors xav tau lub zog siab.

Kev siv lub rooj tsav xwm hauv vaj huam sib luag yuav ua rau koj qhov kev ntseeg tau zoo dua.

Kauj Ruam 3: Xeem

Nov yog daim vis dis aus los ntawm thawj nplooj ntawv ntawm Cov Lus Qhia no.

Tam sim no koj ua tiav!

Koj sim ua qhov Circuit no tam sim no:

www.instructables.com/id/LM350-Power-Supply/