Author Topic: QPLCR new cheap LCR tweezers  (Read 2335 times)

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Offline slavoyTopic starter

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QPLCR new cheap LCR tweezers
« on: July 31, 2024, 05:37:30 am »
2326109-0
I dont know if its new for sure, seen it first time today it in 12voltvids video.
https://www.banggood.com/3S-QPL-Mini-LCR-Tester-Bridge-Tweezers-with-1_14-inch-Display-100Hz-10kHz-Operating-Frequency-Measures-Capacitance-Inductance-and-Resistance-Long-lasting-Battery-for-Accurate-Measurements-p-2016310.html

Quote
Specifications:
- Display: 1.14-inch IPS TFT
- Battery: Built-in lithium battery, capacity 300mA
- Standby Time: About 6 hours
- Interface: Type C
- Operating Frequency: 100Hz, 1KHz, 10kHz
- Operating Voltage: 0.3V, 1.0V
- Measurement Range:
- Capacitance: 1pF-10mF
- Inductance: 1uH-1H
- Resistance: 1mΩ to 10MΩ



Not all menu is in english so far, looking good for the price. Fast and somewhat accurate. I hope the firmware is upgradeable.
« Last Edit: August 01, 2024, 09:31:49 am by slavoy »
 
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Offline thm_w

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Re: QPLCR new cheap 100kHz LCR tweezers
« Reply #1 on: July 31, 2024, 11:02:55 pm »
They look better than the Zoyi from your other thread: https://www.eevblog.com/forum/testgear/zoyi-zt-md1-new-lcr-tweezers/
Faster update rate, etc.

With these companies its much more likely they release the product and then never update the firmware again.

btw can you edit your title to 10kHz, not 100kHz
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Offline indman

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Re: QPLCR new cheap 100kHz LCR tweezers
« Reply #2 on: August 01, 2024, 09:19:59 am »
They look better than the Zoyi from your other thread: https://www.eevblog.com/forum/testgear/zoyi-zt-md1-new-lcr-tweezers/
Faster update rate, etc.
I don’t agree, Zoyi has higher resolution for the Q, D parameters. Another question is how much you can trust these readings from both tweezers? This needs to be compared with other similar devices. ;)
« Last Edit: August 01, 2024, 09:37:34 am by indman »
 

Offline uncle_sem

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Re: QPLCR new cheap LCR tweezers
« Reply #3 on: August 11, 2024, 05:13:54 pm »
Has anyone figured out the Chinese menu? Or maybe there is a new firmware with English?
 

Offline tigrr

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Re: QPLCR new cheap LCR tweezers
« Reply #4 on: November 28, 2024, 11:23:09 pm »
« Last Edit: November 28, 2024, 11:39:15 pm by tigrr »
 
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Offline VintageHenk

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Re: QPLCR new cheap LCR tweezers
« Reply #5 on: December 01, 2024, 02:53:02 am »
I was quite intrigued by the 100kHz QPLINK LCR-S1 and couldn't help myself but to go on the Chinese internet and try to get some clarity on what this thing is. Info is pretty scarce - the images in the AliExpress ads also appear in this video on Bilibili (https://www.bilibili.com/video/BV14usaeWE1g/), and there is some evidence of it on Douyin (https://v.douyin.com/iD9PoREt/, also of the older style QPLCR https://v.douyin.com/iD95YwtP/). QPLCR appears to be an open source Chinese adaptation of a Russian LCR tweezers project - schematics are available (http://www.crystalradio.cn/thread-1996634-1-1.html https://oshwhub.com/moonyblue/dian-qiao-nie-zi). There is also uRLC, which seems to be a more direct adaptation of the Russian project - this webpage has a lot of info and links, also to the original Russian forum threads (https://oldgerman.github.io/845419ff/). Now for the QPLINK - I think it is a Chinese version of the newer Russian nRCL project, which is able to go up to even 200kHz (https://oldgerman.github.io/1eb159fd/ https://vrtp.ru/index.php?showtopic=33311&st=0). So lot of question marks still, but it's at least something :)
 

Offline tigrr

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Re: QPLCR new cheap LCR tweezers
« Reply #6 on: December 03, 2024, 09:55:22 pm »
QPLCR appears to be an open source Chinese adaptation of a Russian LCR tweezers project ...
Now for the QPLINK - I think it is a Chinese version of the newer Russian nRCL project...
So lot of question marks still, but it's at least something :)
Absolutely right. There are no specifics yet to make a comparison....
In particular, there is nothing about the tweezers QPLINK LCR-1S yet - no manual, no firmware, no manufacturer.
Why this is so is absolutely unclear. Why is it always a secret and no-name on Aliexpress???
« Last Edit: December 03, 2024, 09:58:08 pm by tigrr »
 


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