Teeb Duab: 4 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26

Kuv xav txog lub tswv yim rau Cov Lus Qhia no thaum nyeem kab ntawv no:

www.instructables.com/id/Cheap-Two-Channel…

Cov Lus Qhia no qhia txog yuav ua li cas koj tuaj yeem ua qhov sib txawv ci ntsa iab LED teeb nrog cov khoom siv hluav taws xob no.

Koj tseem tuaj yeem sim ua qhov Circuit no:

www.instructables.com/id/Cheap-Colour-Ligh…

los yog

www.instructables.com/id/Cheap-Colour-Ligh…

Txawm li cas los xij, kuv lub Circuit tuaj yeem tsav lub zog ntau dua.

Khoom siv

cov ntaub ntawv: lub hom phiaj dav dav BJT NPN transistors - 3, lub teeb ci ci/LEDs - 5, cov khoom ua npuas, daim ntawv los xij, cov xov hlau, hlau xaim 1 hli, daim kab xev npog, daim kab xev hluav taws xob, 9 V roj teeb, 9 V roj teeb hlua.

cov cuab yeej: txiab, xaim hlua.

cov ntaub ntawv xaiv tau: cov laug, lub zog hloov hluav taws xob, cov cua sov.

cov cuab yeej xaiv tau: soldering hlau, multimeter, simulation software.

Kauj ruam 1: Tsim Circuit Court

Qhov siab tshaj plaws tam sim no LED yuav sib npaug rau:

ImaxLed = (Vs - Vbe) / (Rd + 2*Rled) = (9 V - 0.7 V) / 790 ohms = 10.51 mA

Kauj ruam 2: Ua Circuit Court

Kuv siv ob daim ntawm lub txee.

Koj tsis tuaj yeem pom Rd1 thiab Rd2 resistors hauv daim duab. Txawm li cas los xij, kuv tau txuas lawv. lawv tau npog los ntawm cov xaim daj.

Kuv siv ob peb resistors nyob rau hauv parallel vim tias kuv tsis muaj qhov kuv xav tau.

Kauj Ruam 3: Txuas rau Ua Npuas Dej

Siv daim kab xev los npog rau lub dab dej ua npuas ncauj.

Koj tuaj yeem siv LEDs ci. Txawm li cas los xij, lawv tau them nyiaj ntau dua.

Kuv muaj cov khoom ntim khoom no tau ntau xyoo. Nws yog los ntawm lub pob ntshav qub uas lwm tus neeg hauv kuv tsev neeg tau yuav ntau xyoo dhau los.

Kauj Ruam 4: Kuaj Circuit Court

Kuv luv tag nrho peb lub davhlau ya nyob twg kom tau txais daim duab uas koj pom saum toj no vim tias tsis yog li ntawd, cov LEDs yuav tsis tig rau tib lub sijhawm thaum kuv tig lub potentiometer. Txoj kev yuav tsis ua puas rau transistors lossis potentiometer.

Koj tuaj yeem pom lub Circuit Court ua haujlwm hauv video.

Ob qho LEDs tsis nyob rau tib lub sijhawm rau qhov laj thawj hauv qab no. Qhov nruab nrab qhov hluav taws xob yog 4.5 V. 4.5 V - Vbe (qhov muaj peev xwm hloov hluav taws xob) = 4.5 V - 0.7 V = 3.8 V. Ob lub LEDs xav tau tsawg kawg 4 V tig thiab tseem tuaj yeem muab lub teeb pom kev txawm tias tam sim no me me li 1 mA. Yog li koj tuaj yeem sim hloov ob lub LEDs rau ib channel nrog tsuas yog ib qho LED rau ib channel.

Tom qab ntawd qhov siab tshaj plaws LED tam sim no yuav sib npaug: (9 V - 0.7 V) / 590 ohms = 14.07 mA.

Qhov tam sim no tseem tsis siab heev rau txhua LED thiab tsis tas yuav tsum tau nce qhov kev tiv thaiv Rd qhov tseem ceeb.