xnode wrote:

Does anybody know how to contact RD’s tech support? On AliExpress’s page there isn’t any email available.

https://www.mediafire.com/folder/pqn0ybytqpy7n/TC66

Their contact info (including email) is in the Word doc.

Their email info is also included in the User Manual: 1749808860@qq.com

Which phone are you using? What firmware version is on your TC66? I believe v1.13 is the latest.

Pete7874 wrote:

xnode wrote:

Does anybody know how to contact RD’s tech support? On AliExpress’s page there isn’t any email available.

https://www.mediafire.com/folder/pqn0ybytqpy7n/TC66

Their contact info (including email) is in the Word doc.

Their email info is also included in the User Manual: 1749808860@qq.com

Which phone are you using? What firmware version is on your TC66? I believe v1.13 is the latest.

RD TC66/TC66C Type-C PD trigger USB-C Voltmeter ammeter voltage 2 way current meter multimeter PD charger battery USB Tester

Then click on Contact

You need to be registered with an account at Aliexpress to be able to use private messaging.

why you use photos of UM34C when you are talking about UM24C

EdT wrote:

There is now also several UM25 clones which are several dollars cheaper than the RuiDeng UM25/25C

BlueSwordM wrote:

Only the UM34C supports Dash Charge due to the additional pins of the USB 3 connector on that meter.

Does anyone know of a prepackaged 60W DC to USB C thing? https://www.nicelineshop.com/index.php?main_page=product_info&cPath=&pro... this is just the bare board, I’d like a case with it, if possible

Googling for “DC to USB PD Converter” might help.

Here’s one https://www.omnicharge.co/products/dc-to-usb-c-adapter/

Another in stock: https://www.amazon.com/BiXPower-Type-Power-Converter-Delivery/dp/B07BC5TWJB

Cheaper one (90W): https://www.amazon.com/BatPower-EM3-Converter-Portable-Charging/dp/B01FC...

so sorry, we don’t have

will34 wrote:

This one might be your best bet:

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk...

That bare board has great specs, but I find it hard to believe it would be able to handle 60W of output at lower range of input voltage for long times, say 12V which is 5A+ constant input, chargers usually get quite hot at that rate.

Looks quite great, thanks! However, the size and price is a bit overkill. For such multiport usage, the MagicFox PD180 https://item.jd.com/36832086035.html is cheaper and has higher wattage.

I plan to feed it with 20V. The Lenovo 135W charger looks like great target. https://www.reddit.com/r/thinkpad/comments/bpnc9o/the_p1×1e_small_135w_...

hope you get the better one

YZXstudio has a newer model ZC918P that does 160W. I bought one off ebay, but it’s also available aliexpress. Like other YZXstudio products, it’s good quality but quite expensive.

The Magic Fox PD180 looks very interesting. I think it is unique in offering PD input. Is it available anywhere more accessible than jd.com?

If I want to test the maximum output of a charger, which adjustable load can I buy? Some recommendations?

xnode wrote:

If I want to test the maximum output of a charger, which adjustable load can I buy? Some recommendations?

Depends on the output of the charger you want to test
Here are some of the ones I use for my videos :
https://www.banggood.com/35W-Constant-Current-Double-Adjustable-Electronic-Load-QC2_03_0-Trigger-Quick-Voltage-USB-Tester-p-1194871.html

https://www.banggood.com/8-In-1-150W180W-Digital-Battery-Capacity-Tester-Voltmeter-p-1248703.html

These are just loads, so you'll need something to trigger the protocol you need.

These are just my two cents, btw

I’ve found a new meter similar to YZXstudio ZY1280, is it a copy or is original?

MagicFox魔狐U2 UX电流电压USB测试表QC4 PD3.0 2.0 PPS快充协议容量检测 U2表（无蓝牙）送短CC线

xnode wrote:

If I want to test the maximum output of a charger, which adjustable load can I buy?
Some recommendations?

The Magic Fox one looks like an unbadged version of WEB-U2 (more recently branded as WITRN U2)

https://www.banggood.com/WEB-U2-Current-And-Voltage-Meter-USB-Tester-QC4-PD3_0-2_0-PPS-Fast-Charging-Protocol-Capacity-Test-p-1347851.html

There are very similar USB testers sold under several different brands and the relationship between them is not clear to me (e.g. YZXstudio, WITRN, WEB-, POWER-Z, AVHzY)

not , it is web-z meter , they are different

they are all USB load , but the first one is a trash

I have the RD LD35

https://www.aliexpress.com/item/32882318330.html

This is just a load: if I want to do triggering, I prefer to do it separately.

JJSEA wrote:

I have the RD LD35

https://www.aliexpress.com/item/32882318330.html

This is just a load: if I want to do triggering, I prefer to do it separately.

RD tech wrote:

this is our LD35, it don’t have trigger function, if you need trigger function, you can check our other version HD35 https://www.aliexpress.com/item/RD-HD25-HD35-Trigger-QC2-0-QC3-0-Electro...USB-Load-resistor-Discharge-battery-test-adjustable/32917594486.html?spm=a2g0s.12269583.0.0.29227e83ZyJ5Ff

I believe it has only QC trigger function. It would be great to have a load that also had PD trigger function.

for not , there is not PD trigger load

I found another YZXstudio DC-PD adapter on ebay ZC823×3 (it’s also on their Taobao store): 180W, 6 ports arranged as 3 × 60W USB C/USB A pairs, and DC or PD input.

https://www.ebay.com/itm/ZC823×3-PD-180W-Multi-Protocol-Fast-Charge-App...

I ordered one.

this is a charger, not a load, I just talked about the USB load

Yes, I’d love one.

I’d also be willing to pay a pretty penny for one.

Also maybe with solder pads or terminals for connecting other than USB devices directly without a USB adapter, since that’s a lousy connection.

Too bad my first batch ZL1100 can’t trigger PD even with a newer firmware. Just says NG. So make sure you get a recent one.