Lub diode yog ib yam khoom siv semiconductor nrog unidirectional conductivity. Nws tuaj yeem ntsuas nrog lub multimeter. Lub ntsiab xyuas yog seb nws cov unidirectional conductivity yog qhov qub, thiaj li txiav txim siab qhov zoo ntawm diode. Kev ua haujlwm tshwj xeeb yog dab tsi?
1. Ntxig cov hlau lead kuaj dub rau ntawm lub multimeter rau hauv "COM" jack ntawm lub davhlau ya nyob twg, thiab cov kev xeem liab coj mus rau "Ω / V" jack.
2. Tig lub iav hloov mus rau "Diode nrog buzzer iav", thiab nias lub hwj huam hloov ntawm multimeter. Thaum "1" tshwm rau ntawm qhov screen, qhov kev sim tuaj yeem pib.
3. Siv qhov zoo electrode ntawm diode hu rau tus cwj mem liab, thiab qhov tsis zoo electrode hu rau tus cwj mem kuaj dub. Nyob rau lub sijhawm no, tus nqi tiv thaiv pem hauv ntej ntawm lub diode tau tshwm sim ntawm qhov screen, uas yuav tsum nyob ib puag ncig 500Ω-700Ω nyob rau hauv ib txwm muaj.
4. Hloov ob tus cwj mem rau kev sim rov qab. Txij li thaum lub diode thim rov qab txiav tawm lub sijhawm no, thawj lub cim "1" tau tshwm sim ntawm qhov screen, qhia tias nws qhov rov qab tus nqi yog "m". Qhov xwm txheej no qhia tau tias lub diode zoo.
5. Yog hais tias lub diode pauv rau pem hauv ntej thiab rov qab xeem, cov txiaj ntsig yog ob qho "1" lossis "0", lossis qhov ntsuas rov qab qhia tau tias nws tsis yog "1", thiab lwm yam. Cov xwm txheej no qhia tias lub diode puas lawm thiab siv tsis tau lawm.
