Projection Ammeter

Kev Haujlwm ammeter, haum rau tsev kawm ntawv chav ntsuas kom ntsuas cov kev sib tshuam tam sim no hauv DC ncig, kom ua qauv qhia nrog lub ntsuas pa.– Nrog kev tiv thaiv Circuit Court ntawm silicon diode ntawm 'meter' ib pab tub rog, pub dawb los ntawm kev sib tshooj ntau dhauTshiab teev qhov tseeb ntawm?