Qhov sib txawv ntawm Diode hom thiab ntawm on / off hom ntawm multimeter
Diode hom yog tsuas yog siv los ntsuas cov hluavtaws hluav taws xob rau pem hauv ntej, thaum lub npe hu ua on / off hom, feem ntau yog siv los ntsuas kev txuas ntxiv ntawm Circuit Court. Qee tus neeg ua ke ua ke cov hom buzer nrog Diode hom, thaum lwm tus cais ob hom.
Cov Diode thaiv tsuas yog ua rau qhov chaw voltage ntawm txog 2.8v sab hauv a / d converter, uas yog thov rau v ω qhov thiab com qhov. Thaum koj txuas cov liab thiab dub probes rau ob xaus ntawm kev sim Diode, nws yog feem ntau yog qhov tseeb ntawm kev ntsuas rau pem hauv ntej thiab thim kev voltage poob ntawm cov diode.
Lub on-off hom feem ntau yog tso cai rau cov kev ua haujlwm txhawb kom tswj cov buzzer rau lub suab. Yog tias qhov kev tawm tsam ntawm kev sim ntsuas hluav taws xob yog qis dua 70 ohms, qee qhov yog 60 ohms, thiab qhov no yog nyob ntawm qhov pib amplifier. Qhov ntawd yog hais, peb tuaj yeem hloov lub suab nrov tiv thaiv los ntawm kev hloov lub suab ua haujlwm tau pib, peb tuaj yeem ua kom lub suab ntawm 50 ohms.
Vim li cas tsis tuaj yeem ntsuas kev sib sau ua ke Polarity of Alternating tam sim no
Lub npe hu ua cov kev hloov kho tam sim no yog hais txog qhov tseeb tias nws cov kev hloov pauv polarity hloov, thiab qhov ceev ntawm kev hloov pauv tau nrawm heev. Seb nws yog tus taw tes taw lossis ib qho ntxiv siab dua cov digital digital, nws tsis tuaj yeem hnov nws cov kev sib tw nrawm. Nws polarity hloov tus naj npawb ntawm ib zaug ib lub sijhawm, uas yog hu ua zaus. Nws chav yog Hertz, uas yog muaj npe nyob rau hauv kev hwm ntawm lub npe nrov Doricist Mr. Hertz. Vim yog txoj kev hloov pauv polarity ntawm lub zog hluav taws xob no, nws yog tsis yooj yim sua kom ntsuas nws polarity nrog ib tug dav dav. Yog tias nws yog qhov yuav tsum to taub cov polarity nyob rau qee lub sijhawm, nws tuaj yeem hais tias txoj kev yooj yim tshaj plaws rau cov ntsuas hluav taws xob oscilloscope tshwj xeeb rau kev soj ntsuam AC lossis DC pulses.
Cov kev taw qhia ntawm lwm qhov kev hloov pauv tam sim no txhua lub sijhawm, tsis hais txog polarity. Yog tias koj xav ntsuas cov xaim xaim nyob thiab nruab nrab ntawm cov xaim hluav taws xob, koj tuaj yeem tsim cov kev soj ntsuam zoo tshaj plaws, tuav cov kev sojntsuam dub nrog ib txhais tes, thiab siv cov kev soj ntsuam liab mus kuaj cov hlau. Yog tias tus pointer yog deflected, nws yog cov hlau nyob hlau, thiab yog tias nws tsis yog deflected, nws yog lub hlau nruab nrab. Tsis tas li ntawd, qee cov multiverdeters digital tam sim no tuaj nrog tus cwj mem pov thawj.
AC fais fab yog qhov kev hloov pauv tsis tu ncua uas muaj qhov loj me thiab kev coj, tsis muaj polarity, tsuas yog zaus. Hauv Suav teb, qhov zaus ntawm AC fais fab yog 50 hertz, uas txhais tau tias qhov kev hloov pauv tam sim no thiab dua 50 zaug ib ob thiab cov kev taw qhia hloov 100 zaug. Qhov teeb meem no nws tus kheej yog muaj teeb meem.
