USB power meter/tester thread - YZXStudio, Power-Z, RDTech and more.

Anyone able to update the ZY1273?
I even can’t change the voltage from 4.0 to 1.8V.

What do you mean sir by changing voltage from 4.0 to 1.8v?

Do you mean calibrating the voltage of the ZY1273 from the Settings menu?

If the ZY1273 uses the same firmware flashing method as the ZY1276, then it needs the STM32 programmer device and proper cable/pogo pins to update.

You’re right, i meant the voltage setting in the STM32 programmer software.
I do have the pogo pins, but can’t connect the ZY1273 to flash the firmware 3.1 on it.

Check it out here https://youtu.be/g3foqpBZyjM :wink:

New model out there?

RD AT34 USB 3.0 Color Display Tester dectector And LD35

Seems like a UM24 with smaller display.

Here’s a list with current RD USB meters:
https://rdtech.de.aliexpress.com/store/923042/search?SearchText=usb&origin=n&SortType=price_desc

If that’s the one it’s quite cheap, probably much lower quality than YZXstudio?

AFAIK all RD products are good quality. Maybe not better than YZXStudio but probably with slightly better price/quality ratio.

Not lower quality, but just not as many functions.

The quick charge mode identifier is a little less 'smart', and some other functions just aren't there such as PD trigger etc...

Anyone know anything about these WEB- series of testers?



YZX usb meter is very good, but the price is too higher …
but RD (ruideng meter ) is cheaper and have more function.
for “”UM24C”:https://www.aliexpress.com/item/RD-UM24-UM24C-for-APP-USB-2-0-LCD-Display-Voltmeter-ammeter-battery-charge-voltage-current/32845522857.html?spm=2114.12010108.1000023.1.5aa25437tcldCc” and “”UM25C”:https://www.aliexpress.com/item/RD-UM25-UM25C-for-APP-USB-2-0-Type-C-LCD-Voltmeter-ammeter-voltage-current-meter/32855845265.html?spm=2114.10010108.1000023.3.39efe6d4UQtfqh”: , it can support PC software and android APP, APP can support 21 kinds languages
and
APP and PC software can export data by excel. it is easy to research the data…

but YZX meter did not have ,
For UM34C, it support USB 3.0 and Quick charge recognition mode:QC2.0、QC3.0、APPLE 2.4A/2.1A/ 1A/0.5A、Android DCP、SAMSUNG, support support OPPO phone VOOC, OnePlus DASH
Though UM34C and UM25C have Type-c port , but there is not trigger, only support type-c charge, not recognition

although for data or some function, it is not better than YZX meter, but for the price , it is already best …
for USB load, there are many choice , LD25/LD35
If someone need more cheaper meter, but colorful display, there is also choice
AT34

Waiting for everyone to discuss …

Probably a very basic question, but it has me puzzled. Most of the USB power meters I have or have seen have Groups. What are their purpose.

You don’t have to reset the mAh/Wh measurements when doing several tests in a row. Just switch the group and retain the old data.

That makes sense I suppose. It would allow you to continue a test later or go straight on to a fresh test and record previous data at a later time. I thought it might have been something more significant I was missing.

I have just bought a ZY1276 from Amazon which appears to have recent firmware. I tried AutoDetect on a new Samsung Galaxy S9 charger expecting the Samsung-AFC 9V protocol go green, but it indicates as red which is not available. It is a genuine Samsung charger and has 9V indicated on it. Has anyone else come across this.

Are you using a high quality cable? Is your phone mostly charged?

I am just plugging the ZY1276 direct into the charger, no cable of phone involved. As I understand it the ZY1276 should list the chargers capabilities with Auto Detect.

Anybody got these?

I got these in for a video, they are clones of one the RuiDeng UPM's.

Link?

Also in your option are they good clone?