dab tsi yog qhov voltmeter rau

Cov ntsuas hluav taws xob (Ohmmeter, Ammeter, Voltmeter)

Rau txhua tus hobbyist, cov tub ntxhais kawm ntawm hluav taws xob, hluav taws xob lossis thaj chaw muaj feem xyuam, npau suav yog kom muaj lawv cov cuab yeej ...