HiLetgo 2pcs Digital Voltmeter Ammeter Combo - 0.56" LCD Display - DC 100V 10A Voltage/Current Meter Tester

L Holman: Fit into my little battery charger great. It requires some electrical knowledge to hook it in place of a broken analog meter. Has good electrical diagrams on the Amazon product site pictures.

United States on Dec 03, 2023

Charles J Haggard: This meter is great. I wanted to check the battery supplied power consumption of my go-to device. (12 volt DC, 5 amp max). Easy to hook-up, and is very accurate, it agrees with published specifications dead-on.

United States on Nov 21, 2023

WendyWendy: The voltmeter worked fine, but the ammeter did not work as expected. Another post mentioned this about the product and I confirmed that until I was drawing ~200mA, the current meter read 0.00A at all times even after I attempted to calibrate it using the I-adj potentiometer. I purchased these units for low power application monitoring so they will be returned. Oddly enough however, as I was adjusting the pot, using a small metal jeweler's screwdriver (touching nothing by the potentiometer), as soon as I touched the pot, a current reading would appear. As soon as I removed the screwdriver the reading went back to 0.00A. Very odd behavior indeed. You'll note also that the version of PCB of the units I received look COMPLETELY different than the photos of the units being advertised on Amazon. Perhaps I received an obsolete version of the panel meter or it has to be wired differently than the diagram posted with this item on Amazon, but I could not get it to work despite my 30 years of engineering experience.
I also purchased a DROK high accuracy panel voltmeter/ammeter in the same order and it is working as advertised down to the 1/10th of a milliampere. ...

United States on Jun 14, 2023

Joe S: The wiring was confusing at first, the black &red wires seem to be reversed. You need to look at the polarities from the amp meter's position in the circuit not the load or power source.

United States on Feb 09, 2023

VI GuyVI Guy: I managed to reverse enginee the current amp feedback loop and modify to work correctly. I paralleled a 1Mohm resistor with the feedback resistor connected to the adjustment pot. See pics.

United States on Jun 05, 2022

David J. Higgins: Set it up to use on a 3.3v, 5v and 12v supply but the Ammeter only works with 12v. Voltmeter works fine on all 3. All are linked through the same connections to the ammeter.

Australia on May 09, 2022