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

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RD tech
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for now , we don’t have plan on load, we are designing a big display, many button and function power supply

If you have any interest in USB tester or power supply, please contact me
this is my shop on Aliexpress: https://rdtech.aliexpress.com/store/923042

RD tech
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higher voltage is useless, big current is very important , HD35 have 5A current . 35W is enough

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BlueSwordM
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Yes, but higher voltage is necessary to test high power USB-C PD sources.

I mean, with a 3A cable at 20V, it goes up to 60W.

At 20V with a 5A cable, that goes up to 100W.

A 100W USB PD 3.0/QC 4.0 load would be large, but very useful for many years to come.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

RD tech
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for PD, I will consider

If you have any interest in USB tester or power supply, please contact me
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will34
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It doesn’t have to support 100W constant because that would be very difficult to cool, but 60W is plenty to test most power supplies and powerbanks.

When the industry is moving towards higher voltage, 5V testing becomes irrelevant because it will be considered slow charging anyways.

RD tech
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how about AT35, published today.

It is similar to AT34 but you will find there are differences between this two devices. It is higher version of AT34. The important improvement is the voltage and current accuracy, now voltage and current are displayed in 5-digit, voltage resolution 0.001V, current resolution 0.0001A. you can see that at the detailed page. As old rule, new products…

And as old rule, new products publishing have lowest price only 4 days, 9.8 usd/piece, if buy more 2 pcs, 8.8 usd/piece.

product link:click here to view AT35
product video:


If you have any interest in USB tester or power supply, please contact me
this is my shop on Aliexpress: https://rdtech.aliexpress.com/store/923042

xnode
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will34 wrote:
It doesn’t have to support 100W constant because that would be very difficult to cool, but 60W is plenty to test most power supplies and powerbanks.

When the industry is moving towards higher voltage, 5V testing becomes irrelevant because it will be considered slow charging anyways.


High volts and amps loads probably need to be big or have high revving cooling fan.
BlueSwordM
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Yes, probably.

I’d like one even if quite large.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

RD tech
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not interesting for AT35. but it don’t have big change Sad

If you have any interest in USB tester or power supply, please contact me
this is my shop on Aliexpress: https://rdtech.aliexpress.com/store/923042

Ricez
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This page covers specs of the RD devices
https://sigrok.org/wiki/RDTech_UM_series

And this is good for logging data, it can output JSON

https://github.com/rfinnie/rdserialtool

One thing I’ve noticed with my RD power meters is that the USB sockets seem to wear out and gives an increased voltage drop

RD tech
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Ricez wrote:
This page covers specs of the RD devices
https://sigrok.org/wiki/RDTech_UM_series

And this is good for logging data, it can output JSON

https://github.com/rfinnie/rdserialtool

One thing I’ve noticed with my RD power meters is that the USB sockets seem to wear out and gives an increased voltage drop


thank you for your share,. it is great . for voltage drop, could you show me ?>

If you have any interest in USB tester or power supply, please contact me
this is my shop on Aliexpress: https://rdtech.aliexpress.com/store/923042

fneuf
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Bad day, my faithful YZXStudio 1270 has seen his display crushed. It is serviceable ? If so where to find a replacement screen, or who could repair it ?

Rise and Shine my precious...

fneuf
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Anyone ?

Rise and Shine my precious...

xnode
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RD tech wrote:
RD official store

I have an issue with my TC66C, which I bough off Aliexpress on your official store:

I use the RD-TC66C in “PROTOCOL DETECTION” mode, with this item:

Baseus 45W Quick Charge 4.0 3.0 USB Car Charger For iPhone Xiaomi mi Huawei QC4.0 QC3.0 QC PD 6A Fast Charging Car Phone Charger

I bought the model with USB-A + USB-C from Aliexpress, the model is “Baseus BS-C20C” and is written on the housing.

The issue is: when doing protocol detection everything goes on, until it reaches HUAWEI SCP where your meter powers off and turns on again. Could you check what is happening?

If I connect first a Samsung S10 phone to one of the ports, then the TC66C doesn’t reset but then the protocol results are not the same, maybe the ports of the car charger are not independent?

Related article: The Baseus BS-C20C in the test! USB PD, QC 3.0 and Huawei Super Charge in one car charger for € 10?!?

RD tech
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xnode wrote:
RD tech wrote:
RD official store

I have an issue with my TC66C, which I bough off Aliexpress on your official store:

I use the RD-TC66C in “PROTOCOL DETECTION” mode, with this item:

Baseus 45W Quick Charge 4.0 3.0 USB Car Charger For iPhone Xiaomi mi Huawei QC4.0 QC3.0 QC PD 6A Fast Charging Car Phone Charger

I bought the model with USB-A + USB-C

The issue is: when doing protocol detection everything goes on, until it reaches HUAWEI SCP where your meter powers off and turns on again. Could you check what is happening?

If I connect first a Samsung S10 phone to one of the ports, then the TC66C doesn’t reset but then the protocol results are not the same, maybe the ports of the car charger are not independent?


————
it is Baseus products problem,his charge is bad , he did not use standard charge protocol and use the third part protcol and miss something
at our product page , we write“our products are not compatibility with baseus product”, because his quality is not good, although they sell well, Ugreen charge don’t have any problem
for this problem , we have 2 solutions
1, in fact we already solves this bug , and you can connect PC software to update firmware , it will work
2, you can use micro power to power on , it will not show this problem

If you have any interest in USB tester or power supply, please contact me
this is my shop on Aliexpress: https://rdtech.aliexpress.com/store/923042

will34
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Baseus PD car chargers are trash and DANGEROUS. I bought two of the 30W PD + USB A on sale and both failed safety and functionality tests.

The problem you’re describing is mainly because the charger only works in BUCK mode, which is not specified anywhere so in order to achieve 45W output which is 15V3A you must have it connected in a 24V vehicle. Charger is unable to output above 9V and will restart when such voltage is requested.

Secondly the USB A and usb C port are not well isolated for “dumb” usb devices. Normally when you connect a 9V and a 5V device simultaneously the charger must restart to provide 5V on both ends in case it can’t provide both 9V and 5V at the same time, however with the baseus car charger it will simply provide whatever voltage it’s on the C side as long as the A port device isn’t requesting any specific voltage.

In order to perform the above test I used iPhone X with fast charge cable and a cheap lantern that I quite liked on the other end and the instant 9V charging via micro USB blew the resistors. $10 lantern lost because of a $5 charger.

xnode
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will34 wrote:
Baseus PD car chargers are trash and DANGEROUS. I bought two of the 30W PD + USB A on sale and both failed safety and functionality tests.

The problem you’re describing is mainly because the charger only works in BUCK mode, which is not specified anywhere so in order to achieve 45W output which is 15V3A you must have it connected in a 24V vehicle. Charger is unable to output above 9V and will restart when such voltage is requested.

Secondly the USB A and usb C port are not well isolated for “dumb” usb devices. Normally when you connect a 9V and a 5V device simultaneously the charger must restart to provide 5V on both ends in case it can’t provide both 9V and 5V at the same time, however with the baseus car charger it will simply provide whatever voltage it’s on the C side as long as the A port device isn’t requesting any specific voltage.

In order to perform the above test I used iPhone X with fast charge cable and a cheap lantern that I quite liked on the other end and the instant 9V charging via micro USB blew the resistors. $10 lantern lost because of a $5 charger.


I like that Baseus charger because displays the voltage of the car, the voltage being outputted and the amperage being outputted.
I have used TC66C on a 24V car and has the same issue, it’s not the voltage that makes TC66C reset when doing PROTOCOL DETECTION.
xnode
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RD tech][quote=xnode wrote:
RD tech wrote:
RD official store

it is Baseus products problem,his charge is bad , he did not use standard charge protocol and use the third part protcol and miss something
at our product page , we write“our products are not compatibility with baseus product”, because his quality is not good, although they sell well, Ugreen charge don’t have any problem
for this problem , we have 2 solutions
1, in fact we already solves this bug , and you can connect PC software to update firmware , it will work
2, you can use micro power to power on , it will not show this problem

Ok did some more tests and this is what I’ve found:
- TC66C Firmware upgraded from 1.13 to 1.14
- Now if I connect the TC66C directly to the C port of the Baseus your meter doesn’t turn on: Baseus <-> TC66C
— However if I use C to A and A to C adapters in the middle then it turns on: Baseus<->USB C to A<->USB A to C<->TC66C. Why is this difference happening, is that the adapters modify something in the middle?
- If I connect the TC66C to the A port on the Baseus I need one A to C adapter and turns on again without load.
- PROTOCOL DETECTION detects everything as green when connected to C port on the Baseus and battery is 24V. If I connect to A port it’s the same result but TYPE-C PC is red instead.
  • Which protocol Baseus does not meet properly?

Yokiamy
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While using C to A and A to C again you will just have the A protocol.

Looks like the Baseus is causing the problem.

xnode
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Yokiamy wrote:
While using C to A and A to C again you will just have the A protocol.

Looks like the Baseus is causing the problem.


Using just one of them already implies using A protocol? I though all data was preserved and it was just a physical change.
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Yes, since USB A has just 4 wires (+5V GND TX and RX) whereas USB C has 24.
Data will be preserved though. But you loose all the options of USB C

xnode
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Yokiamy wrote:
Yes, since USB A has just 4 wires (+5V GND TX and RX) whereas USB C has 24.
Data will be preserved though. But you loose all the options of USB C

More info on the issue:
- When connecting TC66C or any other USB-C power meter, like Satechi or Plugable, directly to Baseus C port, power meters don’t power on until I connect some load like charging a phone. If disconnecting the load, the meter powers off again.
- However, If I connect a USB-A meter like YZXstudio to the A port of the Baseus, it powers on immediately even with no load.
Doesn’t this make sense, since PD prevents from sending power until some specific bus data is received? Or power meters already send some signal so it should power or? I don’t have any other PD wall or car charger to test it so I don’t know how it should behave.
RD tech
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xnode][quote=RD tech wrote:
xnode wrote:
RD tech wrote:
RD official store

it is Baseus products problem,his charge is bad , he did not use standard charge protocol and use the third part protcol and miss something
at our product page , we write“our products are not compatibility with baseus product”, because his quality is not good, although they sell well, Ugreen charge don’t have any problem
for this problem , we have 2 solutions
1, in fact we already solves this bug , and you can connect PC software to update firmware , it will work
2, you can use micro power to power on , it will not show this problem

Ok did some more tests and this is what I’ve found:
- TC66C Firmware upgraded from 1.13 to 1.14
- Now if I connect the TC66C directly to the C port of the Baseus your meter doesn’t turn on: Baseus <-> TC66C
— However if I use C to A and A to C adapters in the middle then it turns on: Baseus<->USB C to A<->USB A to C<->TC66C. Why is this difference happening, is that the adapters modify something in the middle?
- If I connect the TC66C to the A port on the Baseus I need one A to C adapter and turns on again without load.
- PROTOCOL DETECTION detects everything as green when connected to C port on the Baseus and battery is 24V. If I connect to A port it’s the same result but TYPE-C PC is red instead.
  • Which protocol Baseus does not meet properly?
Now if I connect the TC66C directly to the C port of the Baseus your meter doesn’t turn on: Baseus <-> TC66C—- this is not charger and TC66C problem, this is PD charger feature, if you want it turn , please turn on our PD switch, it will turn on

If you have any interest in USB tester or power supply, please contact me
this is my shop on Aliexpress: https://rdtech.aliexpress.com/store/923042

xnode
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RD tech wrote:
Now if I connect the TC66C directly to the C port of the Baseus your meter doesn’t turn on: Baseus <-> TC66C—- this is not charger and TC66C problem, this is PD charger feature, if you want it turn , please turn on our PD switch, it will turn on

Tried again connecting TC66C to C port of Baseus, but still doesn’t power on without load. Tested with buttons C and D of the meter in all 4 available positions but still doesn’t turn on.
RD tech
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xnode wrote:
RD tech wrote:
Now if I connect the TC66C directly to the C port of the Baseus your meter doesn’t turn on: Baseus <-> TC66C—- this is not charger and TC66C problem, this is PD charger feature, if you want it turn , please turn on our PD switch, it will turn on

Tried again connecting TC66C to C port of Baseus, but still doesn’t power on without load. Tested with buttons C and D of the meter in all 4 available positions but still doesn’t turn on.

thank you for your reply, could you make a video to show me ?

If you have any interest in USB tester or power supply, please contact me
this is my shop on Aliexpress: https://rdtech.aliexpress.com/store/923042

xnode
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RD tech wrote:
xnode wrote:
RD tech wrote:
Now if I connect the TC66C directly to the C port of the Baseus your meter doesn’t turn on: Baseus <-> TC66C—- this is not charger and TC66C problem, this is PD charger feature, if you want it turn , please turn on our PD switch, it will turn on

Tried again connecting TC66C to C port of Baseus, but still doesn’t power on without load. Tested with buttons C and D of the meter in all 4 available positions but still doesn’t turn on.

thank you for your reply, could you make a video to show me ?

Hi, I sent you the video to your PM. You can see how I connect the meter in all 4 available positions of the switches, and it never turns on witout load. With load, sometimes the meter screen powers on and others not, but always charges the load when connected. By the way, the car charger specific model is the Baseus BS-C20C, it’s written on the case.
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RD tech
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please turn on the PD switch and PWM switch on

If you have any interest in USB tester or power supply, please contact me
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xnode
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RD tech wrote:
please turn on the PD switch and PWM switch on

I already tested with them on, I do not understand what else is missing.
xnode
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Ok finally found how to turn on TC66C meter when it’s standalone connected to PD port of Baseus BS-C20C. You need C physical switch on (POWER) + D physical switch on (POWER DELIVERY) + AG virtual setting ON on Settings menu (CC line mode choice / PD SOFTSWITCH). The 3 are required enabled to turn on. I had the AG setting off thus didn’t turn on without load even with the other two on.

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