TC66C-a powerful Type-C USB tester

Where to buy at a reasonable price? Thanks

Here:
https://www.aliexpress.com/item/RD-TC66-TC66C-Type-C-PD-trigger-USB-C-Voltmeter-ammeter-voltage-2-way-current-meter/32968303350.html

Ask for a 5% BLF discount with your username by contacting them.

what’s the reasonable price?

Aliexpress, check if there is any coupons and discount, I think this price is acceptable.


we adjust the appearance of TC66C, make it easier to understand how to put the switch(power supply switch and PD switch)
“Power supply switch button. When on, you can use system power supply; when off, you can use isolated power supply. For high precision and lower voltage measurement, you can switch to OFF and use micro port to power on.
PD Switch, place the switch on ”OFF” when measuring a device which is charging, PD function OFF; and place the switch on “ON” when do decoy trigger operation, PD function ON. Switch stroke is short so use the switch gently to avoid damage please.”

Every bit of clarity helps.

What is the latest firmware revision?

I see that is Version 1.13

Version 1.13, you can use the PC software to update it to check

Actually, there are many review videos on YouTube, made by different people from different countries. You guys can have a look at these video. If you have interest, you can make orders.Thank you.

Recently, we have received many reviews about TC66C, you guys can have a look:
“And so, what can I say about this tester, as well as comparing it with ZY1276.

A big step forward is the application of the correct circuitry, the manufacturer finally decided to use an external ADC.
In addition, now there is a function not only of monitoring the charger control protocols, but also the ability to control the modes, and the manufacturer immediately waved to Power delivery.
In fact, this is in its simplified version of the ZY1276 tester, but simplified programmatically, not hardware. In favor of the TC66, I’ll take a more convenient firmware update, since a programmer is required for the ZY1276, as well as software, which has its own difficulties for the ZY1276.

The only thing that in my opinion is inconvenient is the presence of only USB Type-C connectors, in this respect the ZY1276 is more flexible as it has more familiar USB-A, but at the same time to connect the Type-C cable is required “dad” - “dad” Type -C, in fact, due to my lack of such a cable, I could not verify the management of Power delivery using ZY1276.

Otherwise, there were positive impressions, good accuracy, moderate functionality, availability of a stand-alone recorder, trigger mode, compact size, current measurements in both directions (with reservation), imputed price, availability of a version with Bluetooth.”

Quoted from: TC66 (C), USB тестер с подключением USB Type-C и встроенным триггером для разных протоколов

Hello,guys! Our new USB Tester is coming, its name is AT35, similar to AT34 but it has 5-digit resolution and higher measurement accuracy.
here is the video link of AT35:

and product link: click here

1, 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.
2. It is higher version of AT34. The important improvement is the voltage and current accuracy, now voltage and current are 5-digit, voltage resolution: 0.001V, current resolution: 0.0001A

new review video of TC66C coming, you can have a look, made by Russian YouTuber, welcome to contact me to talk about our product(we need your advice )
TC66C link:[click here to check information of TC66C]

you guys can tell me what function need to be added or which part need to be adjusted, you can tell everything about this product. So that we can make better product

Well, there’s not too much you could do to improve your USB meters, since they are already so good.

However, an update to the UM25C with a micro-USB port for auxiliary power would be great, along with firmware updates.

Thank you so much, our usb-tester will be designed based on TC66C, and the functions you said will be added to our USB-A tester :laughing:

I would like if it would save trigger settings between power cycle and automatically it would be applied when power is back on. So for example I can use USB charger as power source for desk LED lamps, audio devices, wifi routers etc.

sorry, we can not accomplish this now, still need time

Display PD power-data objects (PDOs) in the Protocol Detect function of the TC66C. You show the supported voltages already for QC and it would be great to see the information for PD.

It looks like you are already detecting them since Protocol Trigger shows only the supported voltages.

I have an idea for a product, but not for this particular tester.
Since you already have a number of devices that can measure and log current and voltage simultaneously, I’d love one that could be connected to a standard 18650 or AA cell in a charger to measure the performance of the charger. Right now, the cheapest way to do these tests is to buy two logging DMMs and use a custom piece of software to record from both at once, plus you need to make some modifications to ensure the added resistance isn’t too high.

Speaking of ideas for new products, a Li-Ion battery discharging/analyzing rig would also be useful. Most of the regular analyzing chargers only discharge at 0.5A or so.