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Reddit mentions of USB Meter, DROK Digital Multimeter USB 2.0, Multifunctional Electrical Tester, Capacity Voltage, Current Power Meter Detector Reader with Dual USB Ports, LED Display, 7 Modes

Sentiment score: 9
Reddit mentions: 28

We found 28 Reddit mentions of USB Meter, DROK Digital Multimeter USB 2.0, Multifunctional Electrical Tester, Capacity Voltage, Current Power Meter Detector Reader with Dual USB Ports, LED Display, 7 Modes. Here are the top ones.

USB Meter, DROK Digital Multimeter USB 2.0, Multifunctional Electrical Tester, Capacity Voltage, Current Power Meter Detector Reader with Dual USB Ports, LED Display, 7 Modes
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    Features:
  • 【7 Modes Display Monitor】 DROK USB Tester is equipped with digital color LED display screen, which can be switched between 7 display modes. This multimeter can be used to measure voltage, current, power, capacity. Through the 7 modes, you can clearly see the voltage, current, capacity and power during charging. Only one button to switch the display mode, simple and handy.
  • 【Dual USB Output】 This item is equipped with USB-A input and dual USB 2.0 output. The output ports support PD QC 3.0 fast charge protocol. This meter can auto identify the fast charge protocol, which can charge your mobile device among 3.6V to 12V 3A. Output Ⅰ can be used for device charging and data transfer, and output Ⅱ can only be used for charging.
  • 【Multifunction】 DROK USB detector can be used for capacity checking, capacity clear, over voltage, under voltage, over current and short circuit alarm, which is easy to test the power, quality and know the health condition of your device chargers or USB cables.
  • 【Easy to Use】 The multimeter only has one button. Once you plug in the meter, you can test the parameter you want. The button can switch 7 modes display——VA(Voltage & Current), C(Capacity), P(Power), VA+C, VA+P, C+P, VA+C+P.
  • 【Application】 DROK USB Meter can be used for the devices between 3.2-30V and 0-5A. You can use this for 5V 9V 12V 24V 30V solar panel, power bank, battery charger, phone charger, USB able.
Specs:
ColorBlack
Height1.2 Inches
Length3.5 Inches
Number of items1
SizeUSB-A
Width3.1 Inches

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Found 28 comments on USB Meter, DROK Digital Multimeter USB 2.0, Multifunctional Electrical Tester, Capacity Voltage, Current Power Meter Detector Reader with Dual USB Ports, LED Display, 7 Modes:

u/mwb6d · 7 pointsr/ipad

I use and recommend this one for USB-A. https://www.amazon.com/dp/B00J3JSEG6

u/hobbified · 3 pointsr/nyc

I'll give a dollar to the first person who hooks up with one of these and reports on the open-circuit voltage, voltage under load, and whether it does at least 2A.

u/Triskite · 3 pointsr/electricians

you can measure resistance with a regular multimeter using the 4-wire method. If you have a regulated digital power supply (like a lithium battery charger with lcd) it's as simple as putting a constant current relatively high amp load on the wire, measuring the voltage drop and dividing by current. you could also use a good quality USB power meter ($10, amazon), or a dedicated ~15 watt meter. i've used an incandescent light bulb for this and got fairly accurate results.

you can also use the same process to test USB cables' resistances. I'll use 2x usb power meters (one on each end of the cable) and a powered off cell phone//other electronic as the load. most modern power banks will also display voltage out and current.

edit: here's some more info, and is quite accurate if done correctly.

u/Snuhmeh · 3 pointsr/TheSilphRoad

I bought one of these to see when it was actually charging: USB Meter, DROK Digital... https://www.amazon.com/dp/B00J3JSEG6?ref=ppx_pop_mob_ap_share
I just keep plugging the gotcha into the cord until I get a reading on the screen.

u/BreakingBarley · 3 pointsr/raspberry_pi

I just let my timelapse script run last night until the 1500mAh battery powering it died. It probably wasn't fully charged, but a Pi model B with just a USB camera attached taking pics every 10 seconds went for 2.5 hours.


There's ways to turn off nonessential accessories on the pi to save power including the HDMI & USB ports. Also, shutting the pi down correctly instead of letting it die will help keep the sd card from being corrupted, some good info here. I've got one of these on the way to really tell how much power I'm using before I figure out a battery solution. Mopi is another option to manage power and automatically turn the pi off before it dies, and I think the mopi can turn the pi off and turn it back on at certain times to extend battery power even further with the addition of a real time clock.

u/Unfuckerupper · 2 pointsr/nexus6

Get yourself one of these if you want to know what your charger is doing. Use a current monitoring widget to see if it is getting to the phone. I have had good luck with Anker chargers in general, but for a Quick Charge capable device it has to be the real thing. Qi chargers are cool, just watch the temperature. They can get hot. Letting you phone sit around at 100% too much is not great for the long time life of your battery.

u/foofoodog · 2 pointsr/raspberry_pi

The hub working simply just as a hub, adding more ports and a conduit for the signals, is different from powering external devices. And so any hub will work with the pi. That being said, I run non powered $4 4 port hubs on a pi zeros and it can run keyboard, mouse, wifi dongle and web cam. I have never needed a hub for my B+, 2's and 3's doing all that as well. Short of running a dvd burner or charging other devices how much power do you really need? You can figure it out with one of these DROK meters. So all hubs work with the pi, the question is really how much power you actually need.

u/Vew · 2 pointsr/electronics

These are pretty handy and not too expensive.


https://www.amazon.com/gp/aw/d/B00J3JSEG6/

u/CJOttawa · 2 pointsr/preppers

You mentioned the basics... how about electricity? I'm specifically thinking of a portable solar arrays, and some multipurpose chargers, batteries devices. Here are a few links of interest:

Super portable 21Watt version that has USB outs:
http://www.amazon.com/dp/B012YUJJM8/

Bigger model but capable of charging 12Volt batteries (I'm thinking trickle charging a car battery):
http://www.amazon.com/Charger-Backpacking-Battery-Foldable-Cellphone/dp/B00VBSFT74/

Multimeter for displaying power output:
http://www.amazon.com/dp/B00J3JSEG6/
(useful for positioning the solar cells for best power)

ThruNite U1 charger and battery; acts as not only a charger for NiCad, NiMH, and Li-Ion cells of varying sizes, but also (drum roll) can be used as a USB powerpack:

http://www.amazon.com/ThruNite-Charger-1x3400mAh-Multifunction-Portable/dp/B00WFXWUOE/

Then, standardize on lights that use 18650 cells as they're way, way better than NiMH (higher power, better capacity, longer life):

http://www.amazon.com/Bundle-Nitecore-Rechargeable-Flashlight-EASTSHINE/dp/B00VG1J8S2/

Oh, random idea... small stove that'll burn wood and comes with a backup alcohol burner:
http://www.amazon.com/dp/B0088FVZZI/

u/TheFabledCock · 2 pointsr/lgg4

Usually different USB ports on the same external battery have completely different amperage outputs. I guess just make sure that you are always using the highest amperage output. One thing that you could do is buy a voltage and current meter from Amazon they're like $7 to watch the power flow through your USB and you could test.

DROK® Dual USB 2.0 Digital Multimeter Ampere Voltage Capacity Power Meter 7 Modes Monitor for Fast Charging Data Sync DC 3.2-15V 0-3A Volt Amp Charger Detector Mobile Solar Panel Alignment Tester https://www.amazon.com/dp/B00J3JSEG6/ref=cm_sw_r_other_awd_XzJDwb5JV4VB4

u/rsaxvc · 2 pointsr/RTLSDR

Can you move to a different port? Maybe the RTL is drawing too much power? These's a USB test tool that will show you the voltage/current of a device. I use https://www.amazon.com/DROK-Digital-Multimeter-Voltmeter-Capacitance/dp/B00J3JSEG6/ref=sr_1_6?ie=UTF8&qid=1492270966&sr=8-6&keywords=usb%2Bvoltage%2Bcurrent&th=1

u/NeedsSleepy · 2 pointsr/ram_trucks

It sounds like you need a USB meter.

u/CSGOTRICK · 2 pointsr/jailbreak

OP, it’s possible your current sensor isn’t getting data through properly. How fast does it actually charge? It may be useful to pick up a cheap USB current & voltage meter. I got a nice one and I have used it countless times.

[Cheap](USB Meter, DROK Digital Multimeter USB 2.0, Multifunctional Electrical Tester, Capacity Voltage, Current Power Meter Detector Reader with Dual USB Ports, LED Displahttps://www.amazon.com/dp/B00J3JSEG6/ref=cm_sw_r_cp_api_i_ss8IDbE6C7JCJ)

[The one I have with unlimited useful tools. ](AVHzY USB Meter Tester Multimeter USB Load Current Tester Voltage Detector DC 26.0000V 6.0000A Test Speed of Charger Cables Capacity of https://www.amazon.com/dp/B073R7YRM9/ref=cm_sw_r_cp_apip_Gc6nVKprYh32G)

u/Masterep01 · 1 pointr/wyzecam

Just something to consider. USB Power meter.

You have just described classic PQ (power quality issues).

There could be many reason for PQ, which is an extremely systemic issue on today's power distribution system because of the "digital" loads and a hot topic spreading across the planet among engineering communities that we are still learning about.

https://www.amazon.com/gp/product/B00J3JSEG6/ref=ox_sc_act_title_1?smid=AFHAE9RJVUMB&psc=1

u/dittani · 1 pointr/MechanicalKeyboards

5 should be safe. 10 probably work ok too. The elite-c has the same chip as a Pro Micro, it will draw the same amount of current.

I have one of these cheap USB power meters. https://www.amazon.com/gp/product/B00J3JSEG6 Useful to see how much power is being drawn.

u/dizzy113 · 1 pointr/teslamotors

I wound up buying this one. I think it's the older model, but was about the same price, had a ton more reviews and showed voltage on same screen.

https://www.amazon.com/gp/product/B00J3JSEG6/

u/das7002 · 1 pointr/shittyengineering

USB Volt/Ammeter's are surprisingly useful.

u/QuirkyQuarQ · 1 pointr/raspberry_pi

> My Pi has connected 1 USB mobile 3g modem, 1 motion sensor over gpio, and (hopefully) 2 i2c sensors.

I'll assume you don't have a USB inline meter doodad to measure the current draw? (they can be had for $3-4 if you can wait 4-6 weeks for shipping from China)

In that case, could you please provide the manufacturer/model numbers for the 3G modem, the motion sensor and the i2c sensors so I can find their datasheets and figure out their maximum current draw?

I'm hopeful 24 hours is doable with a cheaper USB battery, say in the $25 range rather than $50.

u/-Cheule- · 1 pointr/AppleWatch

Adapters have different amp ratings. Purchase one of these usb testers to know exactly what’s going on.

I use it all the time on chargers attached to my iPad, iPhone and watch. It’s interesting how different they all are.

u/windetch · 1 pointr/beetle

The Bosch solid state voltage regs aren't all that expensive, CIP1 has them for $20.99

Sounds like the camera is a little flaky, but in theory the usb adapters should be protecting it.. might pick up one of these and see how well the USB adapters are doing delivering the 5V they're spec'd for.

Could always try one of these, I don't think those dashcams typically draw too much power.

u/RC531976 · 1 pointr/audio

Can you borrow someone else's charger to test with? Perhaps your charger is losing its strength and needs replacing.

There are inexpensive little gadgets that you can plug into the USB to show the voltage and current. It would show if the power is "drooping" lower than what the 2i2 likes.

USB Meter: https://www.amazon.com/dp/B00J3JSEG6/

u/AZImmortal · 1 pointr/oneplus

I can confirm via a USB multimeter that non-Dash charging peaks at 1.5A with a quality charger and cable.

u/scy1192 · 1 pointr/LGG3

Try powering off your phone and charging it. This will all but rule out a software problem. Also, one of these things might come in handy; I haven't found Ampere to be too accurate.

u/kaihatsusha · 1 pointr/raspberry_pi

I suppose this homeassistant needs speaker, microphone, maybe a screen or lights? You want to make sure that EVERYTHING drawing power from a 2.5A supply fits within that at all times, and try to keep a margin like 2.3A max just to be sure. There are some nice USB power meters that can help confirm this.

u/sithranger1601 · 0 pointsr/coupons

To anyone interested, similar multimeters go on sale for $1-3 every now and then. I've gotten two from different brands from watching SlickDeals.