Nws feem ntau tshwm sim hais tias nws yog qhov tsim nyog los txiav txim siab polarity ntawm lub hwj chim muab nyob rau hauv ib qho khoom siv. Kuv tsim kev daws teeb meem rau cov teeb meem rau cov uas tsis muaj multomimat. Nov yog tus tub tes ncaws pob polarity ntawm 4 diodes. Ntawm no yog nws qhov tsos, nws yog me me, yog li ntawd yuav siv sijhawm me me thiab ib txwm tuaj nyob rau hauv cov lus thaum tsis muaj cov khoom siv tshwj xeeb.
Peb yuav nrog cov ntsiab lus
Peb xav tau:
-Digal 4 pcs. (Qauv 1n4001 lossis analogues: 1n4004, 1n4005, 1n4007);
-Yog liab thiab ntsuab;
-Rubrrovistor ntawm 1kom;
- xov hlau;
-Txawm tus nqi ntawm cov nqi siab;
Yuav pib nrog, nruab LEDs
Ua ntej kev xeem, peb txiav txim siab DIODE txiav txim siab polarity. Peb siv lub roj teeb, paub txog nws polarity, thiab txuas nrog tus tester. Tus LED yuav raug zes (yog tias koj txuas cov xov hlau kom raug: liab nrog "+" thiab dub nrog "-"), nws yuav txhais tau tias polarity tau pom tseeb.
Lub hauv paus ntsiab lus ntawm kev nqis tes ua yog yooj yim thaum lub polarity yog pom kom raug (tus dub ", thiab cov" ntxiv ") yuav raug xaiv" txiav txim ", thiab yog tias tsis yog, tus lwm qhov yuav taws.
Kuv muaj "kev txhais" liab coj
Ib qho chaw