Lub multimeter tuaj yeem siv cov ntaub ntawv diode txhawm rau kuaj xyuas LED
LEDs kuj yog diodes, uas kuj muaj cov yam ntxwv ntawm ib-txoj kev conduction. Tsuas yog tam sim no tso cai rau ntws los ntawm tus ncej zoo ntawm LED mus rau tus ncej tsis zoo, yog li peb tuaj yeem siv lub diode iav ntawm multimeter los ntsuas qhov zoo ntawm LED. Cov cwj mem liab thiab xim dub yog kev taw qhia. Ua ntej koj tuaj yeem hloov pauv qhov kev ntsuas ua ntej ntsuas, txhawm rau zam kev txiav txim siab tsis ncaj ncees lawm, tab sis LED yog qhov sib txawv ntawm cov diode zoo tib yam, nws cov hluav taws xob rau pem hauv ntej poob yog qhov siab, thiab cov hluav taws xob rau pem hauv ntej poob ntawm LEDs ntawm cov xim sib txawv kuj txawv. Thaum qhov hluav taws xob qis dua li qhov hluav taws xob poob qis ntawm LED, LED tsuas tuaj yeem teeb me ntsis lossis txawm tsis teeb.
Multimeter diode iav ntsuas txoj cai
Lub diode iav yuav muab qhov tam sim no tsis tu ncua, feem ntau 1mA (qee qhov multimeters yog 2mA). Thaum lub diode txuas, qhov hluav taws xob poob ntawm PN kev sib tshuam ntawm lub diode tuaj yeem ntsuas los txiav txim qhov zoo ntawm lub diode. Txij li thaum tam sim no muab los ntawm lub diode iav yog me me, thaum ntsuas lub LED, yog tias qhov tam sim no xav tau los ntawm LED yog loj, qhov ci yuav kuj tsawg.
Lub multimeter siv los ntawm 9V roj teeb feem ntau tuaj yeem teeb lub LED. Qee lub tshuab hluav taws xob siv los ntawm 3V roj teeb yuav tsis tuaj yeem teeb lub LED nrog kev ua haujlwm siab poob qis.
Multimeter kuj iav kuj tseem ntsuas lub teeb-emitting diodes
Peb kuj tuaj yeem siv tus resistor R100 los ntsuas seb lub LED emits lub teeb. Yog tias qhov ua haujlwm voltage poob ntawm LED yog siab, peb kuj tuaj yeem txiav txim siab txuas lub roj teeb 1.5V hauv koob txhawm rau txhawm rau ntsuas qhov ntsuas hluav taws xob ntawm multimeter, yog li ua kom lub teeb ci ntawm LED kom peb tuaj yeem txiav txim siab seb lub LED puas lawm.
