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diymore 5PCS 0.28" Volt Amp Meter Digital Voltmeter Ammeter DC 100V 10A Waterproof Dual Display Current Voltage Meter Mini Ammeter Voltmeter 3 Bits Dual LED Display Panel(Red-Blue)

4.3 4.3 out of 5 stars 479 ratings

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Purchase options and add-ons

Brand diymore
Power Source Battery Powered
Style Voltage Tester
Color Red-Blue
Item Weight 0.01 Ounces

About this item

  • Volt Amp Meter Display: Volt meter display range: DC 0 - 100V
  • Digital Panel Amp Meter: The measuring range of our dc current meter is DC 0 - 10A
  • Display: 0.28" digital tube, Two color red and blue.
  • Working voltage: DC 4-30V (The maximum input voltage can not exceed 30V. Otherwise the meter will be burned)
  • Applications:Suitable for automotive/electric cars/motorcycles battery monitoring or other products voltage current measurement

Frequently bought together

This item: diymore 5PCS 0.28" Volt Amp Meter Digital Voltmeter Ammeter DC 100V 10A Waterproof Dual Display Current Voltage Meter Mini Ammeter Voltmeter 3 Bits Dual LED Display Panel(Red-Blue)
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Customer reviews

4.3 out of 5 stars
479 global ratings

Customers say

Customers like the functionality, value for money, and display quality of the electric circuit testing device. They mention it works well, is well worth the money, and has a nice display. However, some customers have mixed opinions on accuracy, ease of installation, quality, voltage display, and brightness.

AI-generated from the text of customer reviews

38 customers mention "Functionality"30 positive8 negative

Customers like the functionality of the product. They mention it works perfectly for their projects, is easy to get working, and is a good product. Some say the DIYmore variant has a decent shunt on the ammeter side and calibration pots for both.

"...load common is above the power supply common, but they work well for many applications...." Read more

"...They work perfectly...well, within reason. If you don't understand what a shunt is and are measuring under 5 or 6 amps, you're good to go...." Read more

"They work just fine. Simple to wire in. I didn't think about having to cut an exact-sized hole to mount them, but I'll manage..." Read more

"So I buy these for work and for my own pet projects at home.They work great, and for the price, are a great bargain...." Read more

28 customers mention "Value for money"24 positive4 negative

Customers appreciate the value for money of the electric circuit testing device. They mention it's well worth the money, has a bright display, and is less expensive than mechanical meters. Some say it's a nice addition to any project and turns GPIO relays on and off.

"These are a nice low cost enhancement to small electronic projects. Good display and easy to read...." Read more

"...can even see the amps slowly rise as I turn gpio relays on and off, very cool!" Read more

"...Bright display, less expensive than mechanical meters, smaller size too. Need better instructions...." Read more

"These are really nice for the price and size. I've used mine for a master DC power panel to operate Holiday decorations outside the house...." Read more

11 customers mention "Display quality"11 positive0 negative

Customers are satisfied with the display quality of the electric circuit testing device. They mention it looks great, is easy to read, and provides live data.

"These are a nice low cost enhancement to small electronic projects. Good display and easy to read...." Read more

"...I chose the one closest to my multimeter readings. The display is good and well lit to be able to track both the voltage and current values...." Read more

"...for so I can easily monitor the loads on each body part with live easy to see data, with cut off switches close and at the ready in case he tries to..." Read more

"...With all said, I am happy with the design and the display. I am ordering another 5 meters incase another one fails." Read more

19 customers mention "Accuracy"7 positive12 negative

Customers have mixed opinions about the accuracy of the electric circuit testing device. Some mention it's fairly accurate over the 8-24V 40-400mA range, while others say it needs calibration to avoid inaccurate readings. The voltage accuracy is only good around +/-20% of the value that's trimmed.

"...Consider the accuracy to be a rough approximation rather than a precision measurement. Very satisfied." Read more

"...The accuracy was certain acceptable and useable for the price but I was able to adjust to be more accurate against my five digit multimeter and..." Read more

"...two of them showed accurate results, the other three showed smaller current values when compared to Fluke ammeter...." Read more

"...pi to monitor for voltage sags and current spikes, it is surprisingly accurate, you can even see the amps slowly rise as I turn gpio relays on and..." Read more

18 customers mention "Ease of installation"9 positive9 negative

Customers have mixed opinions about the ease of installation of the electric circuit testing device. Some mention it's easy to install and use, while others say there are no instructions and the correct wiring is not intuitive.

"They work just fine. Simple to wire in. I didn't think about having to cut an exact-sized hole to mount them, but I'll manage..." Read more

"No instructions. Not even the tiny ones that the Chinese love. They work as they should...." Read more

"...Fortunately it's easy to do. There are two small potentiometers on the back that require a size 1 or 2 slot screwdriver...." Read more

"...No directions; although this seems to be not uncommon as directions for most hobby electronics can be found on-line...." Read more

10 customers mention "Quality"6 positive4 negative

Customers have mixed opinions about the quality of the electric circuit testing device. Some mention it's well-packaged, while others say it has poor quality control and frail wires.

"...Having said all the above, they are a great value and the construction is very good. Instructions can be found on YouTube...." Read more

"...meters somewhere on the PCB, but right out of the box three were not up to the spec. I chose the one closest to my multimeter readings...." Read more

"...the current won't display until it reaches 40mA, but I'm pleased with the overall quality...." Read more

"Frail, tiny wires. But works ok" Read more

10 customers mention "Voltage display"3 positive7 negative

Customers have mixed opinions about the voltage display of the electric circuit testing device. Some mention it displays voltage and amprage, while others say it won't display amperage.

"...testing, when powered with a lab supply with 12vdc, it drew 300ma, no display, and climbed quickly to 700ma, and I turned off the power...." Read more

"...It is my fault but I didn't notice that it can't measure positive and negative currents (there is no minus sign on the display)...." Read more

"...variant has a decent shunt on the ammeter side and calibration pots for both voltage and current. Not all variants have this." Read more

"...and Current adjustments on the back are a bit finicky, and the current won't display until it reaches 40mA, but I'm pleased with the overall quality...." Read more

6 customers mention "Brightness"4 positive2 negative

Customers have mixed opinions about the brightness of the electric circuit testing device. Some mention it has a bright display, while others say the led digits make the output dim and somewhat fuzzy.

"...The display is good and well lit to be able to track both the voltage and current values...." Read more

"...One problem is that the plastic shield over the led digits makes the output dim and somewhat burry...." Read more

"...Bright display, less expensive than mechanical meters, smaller size too. Need better instructions...." Read more

"...I would recommend them for non precision applications. The 3-1/2 digit display is bright and large enough for most applications." Read more

Usually great, just got one bad batch.
4 out of 5 stars
Usually great, just got one bad batch.
So I buy these for work and for my own pet projects at home.They work great, and for the price, are a great bargain.Just pay attention to the wiring. They colors of the heavy wires are misleading if your barging ahead and assuming, and not paying strict attention to the wiring instructions.None of my own shipments have every been problematic as far as the meters working.This last shipment I ordered for work, of 2 packs of 5, were problematic, and the meters did not look like all the others.In the past, the others were slightly different. But this set was very different looking.Orders in Jan 2022 and earlier were great.Order in late Feb 2023 was great.Order in Jan 2023, had this bad batch, which looked very different.That Feb 2023 bad batch, all did not work, and several smoked. The one I had here for testing, when powered with a lab supply with 12vdc, it drew 300ma, no display, and climbed quickly to 700ma, and I turned off the power. That meter was on it's way to releasing the magic smoke.So look at the pictures. the one that says Bad (red text), was from the bad batch, all look the same in the batch. Comparatively to a good meter, it has nearly no components in the very middle of the PCB on the visible side of the PCB. And it has that table near center / bottom of the PCB , with 'HW" on it.The other picture, is of a good working / tested meter. And all my good ones look similar, but with some minor differences in component layout.So when the new order arrives, we will inspect and test, before waiting for a build.
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Top reviews from the United States

Reviewed in the United States on November 24, 2024
Color: Blue-GreenVerified Purchase
These are a nice low cost enhancement to small electronic projects. Good display and easy to read. A bit odd since the negative is used as the current input so the load common is above the power supply common, but they work well for many applications. They work as described and show consistent readings meter to meter. Consider the accuracy to be a rough approximation rather than a precision measurement. Very satisfied.
Reviewed in the United States on November 27, 2024
Color: Blue-GreenVerified Purchase
If you don't know how and why these can read voltage and amperage don't bother. They work perfectly...well, within reason. If you don't understand what a shunt is and are measuring under 5 or 6 amps, you're good to go. If you don't know what a shunt is and are measuring over 20 amps, buy a fire extinguisher also
Reviewed in the United States on January 28, 2021
Color: Red-BlueVerified Purchase
No instructions. Not even the tiny ones that the Chinese love. They work as they should. One problem is that the plastic shield over the led digits makes the output dim and somewhat burry. On the plus side, the shield can be removed (not really needed) and both the voltage and current sections can be individually adjusted for accuracy. The accuracy was certain acceptable and useable for the price but I was able to adjust to be more accurate against my five digit multimeter and very accurate voltage standard (of course, better but not equivalent). Hyper accuracy is typically not required since these units are mainly used in power supply. You can also remove the casing from the circuit board if you like. Having said all the above, they are a great value and the construction is very good. Instructions can be found on YouTube. Some are wrong and some are poorly done (too many amateurs), so I would suggest watching four or five and make you own diagrams, which is what I did. Luckily, the units are pretty tolerant of being hooked up incorrectly and the correct wiring is not intuitive (for example, a common voltage current measure situation, the thin black wire is not connected to anything.) Lastly, I say all this being a graduate EE.
9 people found this helpful
Report
Reviewed in the United States on September 17, 2024
Color: Blue-GreenVerified Purchase
They work just fine. Simple to wire in. I didn't think about having to cut an exact-sized hole to mount them, but I'll manage...
Reviewed in the United States on December 7, 2023
Color: Blue-GreenVerified Purchase
been running one of these for about 3 weeks continuously now, have it connected between the power supply and a raspberry pi to monitor for voltage sags and current spikes, it is surprisingly accurate, you can even see the amps slowly rise as I turn gpio relays on and off, very cool!
Reviewed in the United States on December 12, 2022
Color: Blue-GreenVerified Purchase
Out of five meters, two of them showed accurate results, the other three showed smaller current values when compared to Fluke ammeter. Perhaps there is an adjustment pot on these meters somewhere on the PCB, but right out of the box three were not up to the spec. I chose the one closest to my multimeter readings. The display is good and well lit to be able to track both the voltage and current values.
Update: The seller reached me about calibrating voltage and current readings on these meters. The meters have two calibration potentiometer screws, one for voltage and one for current. So, you need to adjust them against a standard if your meter is off. So, I am upgrading the product to five stars.
8 people found this helpful
Report
Reviewed in the United States on March 16, 2023
Color: Red-BlueVerified Purchase
So I buy these for work and for my own pet projects at home.
They work great, and for the price, are a great bargain.
Just pay attention to the wiring. They colors of the heavy wires are misleading if your barging ahead and assuming, and not paying strict attention to the wiring instructions.

None of my own shipments have every been problematic as far as the meters working.

This last shipment I ordered for work, of 2 packs of 5, were problematic, and the meters did not look like all the others.
In the past, the others were slightly different. But this set was very different looking.

Orders in Jan 2022 and earlier were great.
Order in late Feb 2023 was great.
Order in Jan 2023, had this bad batch, which looked very different.

That Feb 2023 bad batch, all did not work, and several smoked. The one I had here for testing, when powered with a lab supply with 12vdc, it drew 300ma, no display, and climbed quickly to 700ma, and I turned off the power. That meter was on it's way to releasing the magic smoke.

So look at the pictures. the one that says Bad (red text), was from the bad batch, all look the same in the batch. Comparatively to a good meter, it has nearly no components in the very middle of the PCB on the visible side of the PCB. And it has that table near center / bottom of the PCB , with 'HW" on it.

The other picture, is of a good working / tested meter. And all my good ones look similar, but with some minor differences in component layout.

So when the new order arrives, we will inspect and test, before waiting for a build.
Customer image
BK
4.0 out of 5 stars Usually great, just got one bad batch.
Reviewed in the United States on March 16, 2023
So I buy these for work and for my own pet projects at home.
They work great, and for the price, are a great bargain.
Just pay attention to the wiring. They colors of the heavy wires are misleading if your barging ahead and assuming, and not paying strict attention to the wiring instructions.

None of my own shipments have every been problematic as far as the meters working.

This last shipment I ordered for work, of 2 packs of 5, were problematic, and the meters did not look like all the others.
In the past, the others were slightly different. But this set was very different looking.

Orders in Jan 2022 and earlier were great.
Order in late Feb 2023 was great.
Order in Jan 2023, had this bad batch, which looked very different.

That Feb 2023 bad batch, all did not work, and several smoked. The one I had here for testing, when powered with a lab supply with 12vdc, it drew 300ma, no display, and climbed quickly to 700ma, and I turned off the power. That meter was on it's way to releasing the magic smoke.

So look at the pictures. the one that says Bad (red text), was from the bad batch, all look the same in the batch. Comparatively to a good meter, it has nearly no components in the very middle of the PCB on the visible side of the PCB. And it has that table near center / bottom of the PCB , with 'HW" on it.

The other picture, is of a good working / tested meter. And all my good ones look similar, but with some minor differences in component layout.

So when the new order arrives, we will inspect and test, before waiting for a build.
Images in this review
Customer image Customer image
Customer imageCustomer image
9 people found this helpful
Report
Reviewed in the United States on September 25, 2024
Color: Blue-RedVerified Purchase
I recenly bought 10 of these for use on a couple of projects. While the voltmeter section worked well the ammeter section gave wild and usless results. In most cases I was reading 40+ AMPS when I had less then 2 amps going though the device. On some units I would see a low reading on the display even when no wires were connected to the shunt. On other units I would see 0.00 on the display until I had 0.25 or more amps going through the shunt and then the display would show much higher current values than what was actually going through the device. Two of the units read 0.00 amps until the current got up to about 1.00 amp then suddenly the display would jump to 2.00 amps and increase to 2.02 amps when the current though the device went up to 2.00 amps.One unit completly failed after 10-15 min of use. I'll put tape over the ammeter part of the display and use the remaining units when I want a voltmeter and look for something else to display current. A real disapointment but at least not total loss.

Top reviews from other countries

nate
5.0 out of 5 stars Works good
Reviewed in Canada on March 23, 2024
Color: Red-BlueVerified Purchase
All 👍
Ok
Y.S.CA
1.0 out of 5 stars Labeled as 10pc, parcel came with only one inside
Reviewed in Canada on August 26, 2023
Color: Blue-RedVerified Purchase
Refund requested.
Gerald
2.0 out of 5 stars Poor Quality Control
Reviewed in Canada on May 25, 2024
Color: Red-BlueVerified Purchase
Only slightly better than "Linkstyle" as a supplier
At least these all powered on and displayed values.
3 of 5 units were faulty - with grossly inaccurate current values displayed

I have had much better luck buying suh meters from eBay
though there is a longer wait for the product,
at least they all work correctly.
Dave
1.0 out of 5 stars received items do not match images included in the description
Reviewed in Canada on August 7, 2023
Color: Red-BlueVerified Purchase
Items do not match images shown in the description. The shunt resistor is not an alloy wire. There is no trim pot for adjusting the current measurement. The current readings are always at least 20-30% higher than expected. The voltage reading only shows 2 digits instead of 3 when the measured value is less than 10 volts.

 

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