Thaum ntsuas luv luv Circuit Court thiab qhib Circuit Court nrog multimeter, kuv puas yuav tsum siv hom on-off lossis hom tsis kam?
Lub on-off iav tseem hu ua buzzer iav. Nyob rau hauv cov iav no, yog tias tus nqi ntawm cov kab nyob rau hauv kev ntsuam xyuas yog qis dua ib qho nqi (Kuv tsis nco qab tus lej tshwj xeeb, nws tau piav qhia meej hauv phau ntawv qhia), lub buzzer yuav suab.
Ua ib qho piv txwv digital multimeter, hom buzzer zoo li muaj peev xwm ntsuas kev tiv thaiv mus txog 2,000 ohms.
Piv txwv li, yog tias koj ntsuas cov kab ntshiab (xws li 100- meter yob ntawm hlau), nws yuav nrov yog tias cov hlau tsis tawg.
Lwm qhov piv txwv yog ib feem ntawm kab. Tej zaum yuav muaj qee cov khoom tiv thaiv (xws li coils, lub cev muaj zog windings) txuas nrog hauv cov kab hauv nruab nrab, lossis cov kab yuav ntev heev, nrog ntau qhov sib txuas, thiab lwm yam. Thaum ntsuas ntawm qib no, nws yuav tsis beep, tab sis nws yuav tso saib. tus nqi. Tus nqi ntawm lub sijhawm no yog qhov kev tawm tsam ntawm ntu no ntawm kab, tab sis nws tsis tuaj yeem qhia tag nrho cov kab lus no qhib.
Piv txwv li: koj random xaiv ib tug zoo AC contactor kauj thiab siv lub buzzer teeb los ntsuas ob kawg ntawm lub kauj. Nws yuav tsis beep, tab sis nws yuav tso saib tus nqi (xav tias yog 758); koj mam li siv qhov 2 kiloohm kuj teeb tsa los kuaj dua. Tus nqi tau txais tseem yog 758, uas txhais tau hais tias qhov kev tiv thaiv ntawm lub kauj yog 758 ohms. Lub sijhawm no koj tsis tuaj yeem hais tias lub kauj yog qhib Circuit Court. Yog tias lub kauj qhib, qhov kev nyeem ntawv yuav yog xoom thiab yuav tsis muaj chirp.
Yog tsis muaj chirping los yog qhia, nruj me ntsis hais lus, nws tseem tsis tau txhais hais tias kab no yog qhib. Vim hais tias raws li tau hais los saum no, cov iav no tsuas yog ntsuas qhov siab tshaj plaws ntawm 2 kiloohms. Yog li, nws muaj peev xwm hais tias qhov kev tawm tsam ntawm kab no siab dua 2, 000 ohms. Lub sijhawm no, koj tuaj yeem hloov mus rau qib siab dua thiab sim dua.
Hauv kev xyaum, feem ntau tsis tas yuav mus rau hauv cov ntsiab lus zoo li no. Piv txwv li, yog tias 100-meter yob ntawm hlau tsis tawg, yog tias nws tsis beep thaum ntsuas nrog lub buzzer, nws tuaj yeem txiav txim siab tias yob ntawm cov hlau tsis zoo li nws tau ua.
Lwm qhov piv txwv yog tias koj paub tias qhov koj xav ntsuas yog qhov winding ntawm lub cev muaj zog, thiab koj muaj lub tswv yim zoo ntawm tus lej hauv siab ua ntej ntsuas. Thaum ntsuas nws hauv hom buzzer, nws tsis qhia tus lej lossis beep. Yuav kom ntseeg tau qhov tseeb, koj yuav tsum hloov mus rau lub iav loj dua thiab ntsuas dua.
Txawm li cas los xij, kuv tus kheej xav tias qhov peb yuav tsum xyuam xim rau yog: 1. Hom buzzer tsuas tuaj yeem ntsuas qhov tsis kam qis dua 2 kΩ; 2. Nws tsuas yog beep thaum tus nqi tiv thaiv tiag tiag qis dua li tus nqi teev. Khaws qhov no hauv siab thiab tom qab ntawd kwv yees qhov tseeb ntawm qhov kev kwv yees tau tshwm sim raws li cov xwm txheej tiag tiag. Hauv lwm lo lus, kwv yees seb qhov ntsuas qhov twg yog qhov haum tshaj plaws raws li qhov xwm txheej tiag tiag.
