HiLetgo 2pcs 0.28" Digital Voltmeter Ammeter DC 100V 10A Amp Voltage Current Meter Tester 0.28 Inch 3 Bits Blue + Red Dual LED Display Panel with Connect Wires

Used to make a diy power supply from and old pc atx. Works great, is not deadly accurate but it will do.

Works well for slot cars. Just wire it into the power pack. Then you can see what the cars are pulling.

The voltmeter was great. Reads well and bright without sucking significant voltage from the source. I couldn’t get the ammpeter to work without it pulling down the current significantly but in my application that was ok. I could’ve been using it wrong as well but that’s my experience. Great product. Exceeded my expectations for the price point

No instructions. Wiring diagram in Amazon ad is confusing/misleading. I was not able to get a reading (neither volts nor amps) no matter what I tried. Ad suggests that it will measure up to 100v, but later in description says it will burn out with anything more than 30v. Bottom line, not useful for my needs.

These are great little meters. I have 4 of them that I used to moniter power supply outputs and they work great,

For the price you get two compact, easy-to-read meters. Instructions are not included but there are similar meters with on-line videos and wiring diagrams. The voltmeter works well and can be calibrated to within 0.1 V. The ammeter is poor, however. It does not read current below 100 mA and cannot be calibrated any closer than 25-30%. Also the ammeter response is slow and sometimes toggles 15 mA up and down. I judge these meters OK for non-critical applications like solar panel charging or battery-lighting systems. I purchased them for a bench-top power supply but they fail for that purpose.

I used these to incorporate voltage/current readouts into my DIY power supplies that power my vintage Commodore 64 computers. With these I can rest assured of what they are putting out. They seem to be fairly accurate & the displays can be fine-tuned I think for accuracy. The current measuring wiring can be a bit tricky but if you look at other reviews of these(and similar offerings on Amazon), you can find out how exactly to wire them successfully.

I have used these on various projects and they work very well. A very good value.

回路図も説明書も無いうえに私の知性の弱さから苦労しましたが 色々と他商品のヒントを参考に研究し理解することが出来ました 精度はあまり期待しないほうが良いかと思って 他の商品も購入することとしました。 小さな紙切れで良いので回路図くらいほしいですね

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.

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