Txoj kev rau kev sim cov qauv coj los siv ntau ntau
Kev Ntsuas Hauv R × 10K Khwv Nrog Dickke Digital
Siv tus pointer sib txuas nrog ib qho 10K ω ntau tuaj yeem sib tw txiav txim siab qhov zoo ntawm lub teeb {}} emitting diode. Nyob rau hauv ib txwm muaj xwm txheej, rau pem hauv ntej tsis kam ntawm ib tug diode ranges los ntawm kaum mus rau 200k ω, thaum rov thim rov qab muaj tus nqi ntawm α. Yog tias tus nqi rau pem hauv ntej yog 0 lossis ∞, thiab rov qab tiv nqi yog tsawg heev lossis 0, nws yog ib qho kev puas tsuaj. Txoj kev kuaj pom no tsis tuaj yeem tawm ntawm lub teeb pom kev ntawm lub teeb - Qhov ntau tsis tuaj yeem muab qhov tam sim ntawd rau cov LED.
Siv ob lub multimeters los ntsuas ua ke
Yog tias muaj ob lub pointer multimeters (* ntawm tib tus qauv), nws tuaj yeem txheeb xyuas lub teeb pom kev zoo ntawm LED. Txuas cov "+" lub davhlau ya nyob twg ntawm ib tug multimeter rau "-" davhlau ya nyob twg ntawm lwm tus multimeter siv ib xaim. Qhov seem "{{{{{4}" pens txuas nrog tus ncej zoo (P cheeb tsam) ntawm kev sim rau tus ncej tsis zoo (n cheeb tsam) ntawm kev sim LED. Ob qho tib si multimeters tau teem rau X 10 ω ntau. Nyob rau hauv ib txwm muaj xwm txheej, nws tuaj yeem taws tau ib txwm tom qab tau txuas nrog. Yog tias lub ci ci yog tsawg heev los yog txawm tias tsis emit teeb, ob lub multimeters tuaj yeem tsim rau * 1 ω. Yog tias nws tseem tsaus ntuj nti lossis txawm tias tsis emit teeb, nws qhia tau tias LED kev ua haujlwm yog * * lossis puas. Nws yuav tsum raug sau tseg tias ob tug neeg yuav tsum tsis txhob muab tso rau ntawm x 1 ω Thaum pib ntsuas kev ntsuas kom tsis txhob muaj qhov teeb meem dhau los thiab kev puas tsuaj rau lub teeb}}} emitting diode.
Kev ntsuas ntawm cov hluav taws xob sab nrauv
Cov yam ntxwv thaij duab thiab hluav taws xob ntawm lub teeb {{} em} em} em} em series}}}}}}}}}}} illimeter sib txuas cov roj teeb thiab tus lej sib xyaw lossis digital). Yuav kom ua tiav qhov no, cov Circuit Court tuaj yeem sib txuas raws li qhia hauv daim duab 10. Yog tias ntsuas VF yog ib txwm muaj, nws tuaj yeem qhia tau tias cov luminescence yog li qub. If VF=0 or VF ≈ 3V is measured and no light is emitted, it indicates that the light-emitting tube is broken.
