Yuav ua li cas kho pointer multimeter buzzer tsis suab
Rau cov neeg feem ntau siv MF47 pointer multimeter, ib feem ntawm cov qauv nrog kev kuaj pom. Ntawd yog, lub buzzer txuas nrog hauv series hauv Circuit Court. Passage buzzer nrhiav pom; cov iav no nyob rau hauv qhov kev tiv thaiv thaiv R * 1Ω ib sab ntawm lub thaiv.
Cov iav no feem ntau yog siv los txiav txim siab ceev ntawm Circuit Court rau, tawm, hauv kev ntsuas ntawm cov ntaub ntawv los ntawm lub buzzer yuav tam sim ntawd emit suab beeping, tsis tas yuav siv lub qhov muag kom pom ntau lub koob qhia, uas yog, koj tuaj yeem ua tau. nkag siab txog lub voj voog ntawm qhov xwm txheej on-off.
Ua ntej ntawm tag nrho cov, nws yog tib yam li cov resistor yuav tsum xoom lub ntsuas, lub sij hawm no lub buzzer ua hauj lwm txog 1kHz ntev beep, yuav ntsuas. Thaum tus nqi tsis kam ntawm qhov ntsuas hluav taws xob qis dua li ntawm 10 Ω, lub buzzer yuav suab nrov. Nws yuav tsum tau muab sau tseg tias qhov luaj li cas ntawm lub suab buzzer thiab ntsuas Circuit Court kuj muaj nuj nqis inversely proportional rau kev sib raug zoo (ie, qhov ntau dua tus nqi ntawm lub Circuit Court, lub buzzer suab me me), thaum tus dial pointer tus nqi ntawm R * 3. (siv tus nqi).
Rau qhov no pointer multimeter, buzzer kev puas tsuaj feem ntau yog tshwm sim los ntawm tus neeg siv yuam kev dial nyob rau hauv lub buzzer iav los ntsuas AC voltage thiab puas.
Muaj ob hom buzzers, ib qho yog piezoelectric ceramic buzzer thiab lwm yam yog electromagnetic buzzer. Multimeters sib txawv yuav siv cov buzzers sib txawv. Lub piezo ceramic buzzer muaj lub suab tab sis muaj zog heev thaum ntsuas nrog lub tshuab hluav taws xob, thaum lub tshuab hluav taws xob electromagnetic muaj qee yam tsis kam thiab tawm suab nrov thaum ntsuas nrog lub tshuab multimeter.
