Yuav Tiv Thaiv Li Cas Los Ntawm Kev Kub Ntxhov?: 5 Kauj Ruam

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

Ua ntej peb hais yuav tiv thaiv LED los ntawm kev hlawv, peb yuav tsum hais tias LED yog dab tsi.

LEDstands rau lub teeb emitting diode, yog cov khoom siv hluav taws xob uas tso tawm pom lub teeb ntawm qee yam xim thaum tam sim no ntws los ntawm nws thiab yog qhov sib txawv hauv paus los ntawm cov teeb pom kev zoo xws li roj teeb, fluorescent, thiab cov roj tso tawm. Nws yog tsim los ntawm txheej tuab heev ntawm qhov hnyav hnyav doped cov khoom siv hluav taws xob.

Kauj Ruam 1: Keeb Kwm ntawm LED

Semiconductors

Cov khoom siv hluav taws xob yog cov khoom siv uas muaj kev sib txuas ntawm cov neeg siv hluav taws xob thiab cov insulators xws li germanium lossis silicon.

Qhov (yog tus thauj tus nqi hluav taws xob zoo) thiab cov khoom siv hluav taws xob (yog cov khoom tsis zoo them nqi) yog hom kev nqa cov neeg nqa khoom lub luag haujlwm rau kev khiav ntawm cov hluav taws xob tam sim no hauv cov khoom siv hluav taws xob.

Hom Semiconductors

1. Cov khoom siv hluav taws xob ib puag ncig yog tsim los ntawm tsuas yog ib hom ntawm cov khoom xws li silicon.
2. Cov khoom siv hluav taws xob txuas ntxiv yog cov khoom siv hluav taws xob uas tau ua los ntawm qhov tsis huv tshwj xeeb (Impure semiconductor) uas tuaj yeem hloov kho nws cov khoom siv hluav taws xob. Cov txheej txheem ntawm kev ntxiv qhov tsis huv atoms rau cov khoom siv hluav taws xob ntshiab hu ua Doping.

Extrinsic Semiconductor

Extrinsic semiconductor tuaj yeem muab cais ua lwm yam:

• N-hom Semiconductor: Thaum cov khoom siv hluav taws xob ntshiab xws li (Silicon) raug doped nrog pentavalent impurity (P, Raws li). Cov hluav taws xob hauv n-hom semiconductor feem ntau yog cov nqa khoom thiab qhov yog cov nqa me me.
• P-hom Semiconductor: Thaum cov khoom siv hluav taws xob ntshiab xws li (silicon) raug doped nrog qhov tsis sib xws (B, Al). Cov qhov hauv p-hom semiconductor yog cov nqa khoom feem ntau thiab cov khoom siv hluav taws xob yog cov nqa me.

P-N Kev sib tshuam

Kev sib tshuam p-n yog ciam teb nruab nrab ntawm thep-type semiconductor (muaj qhov ntau tshaj qhov) thiab n-hom semiconductor (muaj ntau ntawm cov hluav taws xob). Kev Thaj Tsam Tsis Zoo ua zoo li phab ntsa ntawm p-type thiab n-type thiab tiv thaiv kev ntws ntxiv ntawm cov khoom siv hluav taws xob dawb thiab qhov.

Diode

Semiconductor diode yog ib qho ntawm Semiconductors daim ntawv thov, yog ob lub davhlau ya nyob twg uas suav nrog p-n kev sib txuas thiab cov hlau sib txuas ntawm lawv ob qho kawg thiab muaj qhov tsis kam tiv thaiv kom tsis txhob ntws ntawm ib qho.

LED yog ib qho ntawm cov ntawv thov ntawm Semiconductor Diode

Yog xav paub ntxiv, mus saib peb kab lus hais txog semiconductors.

Kauj Ruam 2: LED Tam Sim No Txwv Tiv Thaiv

Yuav Ua Li Cas Tiv Thaiv LED Los Kub?

Txuas lub LED ncaj qha mus rau lub zog siv hluav taws xob tuaj yeem ua rau LED ntxeev tawm. Peb yuav tsum txuas tus tiv thaiv hauv kab ntawm coj thiab qhov hluav taws xob, Qhov tiv thaiv no hu ua ballast resistor thiab ballast resistor tau siv los txwv qhov tam sim no los ntawm LED thiab tiv thaiv kom nws kub hnyiab.

Yog tias qhov hluav taws xob qhov sib npaug ntawm qhov poob qis ntawm LED, tsis xav tau tus tiv thaiv.

Kev tiv thaiv ntawm lub ballast resistor tau yooj yim los suav nrog Ohm txoj cai thiab Kirchhoff txoj cai lij choj. Cov ntsuas hluav taws xob LED tau muab rho tawm los ntawm qhov hluav taws xob qhov hluav taws xob, thiab tom qab ntawd faib los ntawm qhov xav tau LED ua haujlwm tam sim no.

Kauj Ruam 3: Txheeb Xyuas (LED Circuit Nrog Resistor 1 Ohm)

Thaum peb txuas tus tiv thaiv uas muaj tus nqi sib npaug 1 ohm hauv kab nruab nrab ntawm qhov coj thiab qhov hluav taws xob, peb pom tias cov dej ntws tam sim no hauv Circuit Court nrog tus nqi sib npaug 808 mA (tus nqi no loj heev, tuaj yeem ua rau LED hlawv tawm thiab tsis pub tshaj) qhov siab tshaj tam sim no los ntawm LED yog 20 mA).

Peb yuav tsum txo tus nqi tam sim no uas ntws hauv Circuit Court thiab LED qhov hluav taws xob los ntawm kev hloov tus nqi tiv thaiv kom txog thaum peb mus txog tus nqi ntawm tus tiv thaiv uas ua rau tam sim no ntws hauv Circuit 20 mA.

Kauj Ruam 4: Txheeb Xyuas (hloov Tus Nqi Kuj)

Thaum peb hloov tus nqi tiv thaiv los ntawm 1 ohm txog 200 ohm, peb pom: Cov dej ntws tam sim no hauv Circuit Court yog 33.8 mA. Qhov hluav taws xob hla tus coj yog 2.18 V

Peb yuav tsum nce tus nqi ntawm kev tiv thaiv kom txog thaum peb mus txog tus nqi ntawm cov tshuaj tiv thaiv uas ua rau cov hluav taws xob tam sim no ntws hauv Circuit 20 mA.

Thaum peb hloov tus nqi tiv thaiv los ntawm 200 ohm txog 300 ohm, peb pom: Cov dej ntws tam sim no hauv Circuit Court yog 22.9 mA. Qhov Voltage hla tus coj yog 2.10 V

Thaum peb hloov tus nqi tiv thaiv los ntawm 300 ohm txog 345 ohm, peb pom: Tam sim no ntws hauv Circuit Court yog 20.0 mA. Qhov Voltage hla tus coj yog 2.08 V

Tam sim no peb paub qhov txwv ntawm ballast resistor (R> = 345 Ohm) uas peb xav tau kom txwv qhov tam sim no los ntawm LED thiab tiv thaiv kom nws kub hnyiab.

Kauj Ruam 5: Circuit Animations

peb pom los ntawm cov duab kos hauv Circuit uas

thaum peb nce tus nqi ntawm ballast resistor, qhov nrawm tam sim no tau qis dua vim tias cov tshuaj tiv thaiv ballast tau siv los txwv qhov tam sim no los ntawm LED thiab tiv thaiv kom nws kub hnyiab.

Ua tsaug rau kev nyeem ntawv.