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Design a New Precision LCR Tweezers with Much Lower Cost(Video Attached)

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Shannon:
Shannon Tweezers Calibration Process

2021/12/30
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This video is to demonstrate the calibration process of Shannon Tweezers, which is easy to conduct through three steps.
you can observe how accurate and precise through this video.
Hope you like it.




Menu and ABS case Image Update

2021/10/05
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The unboxing Shannon Tweezers video is coming.
Forgive my poor English and video cut tech :palm:
Hope you like it.

This video content includes
1. the Container for the Tweezers
2. The ABS Case and Tips teardown
3. Accuracy Presentation
4. Hold Function and shortcut
5. Oscilloscope and Shannon Tweezers test each other

If you have any questions, please feel free to let me know.
Thanks for your suggestions and supports, we will be there.



2021/10/04
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About a year ago, a friend discussed an AC impedance measurement scheme with me, we think this scheme can meet most of the testing requirements. Then we started to cooperate to discuss the possibility of a more practical LCR tweezers.
Because of the impact of the epidemic, the progress of many works is surprisingly slow. After many experiments, we have realized its basic functions and prototype.

I share our experience here and welcome your comments. We will continue to optimize the design, If more electronic enthusiasts are interested, we will try to cooperate with more friends to make it into a product.

Compared with other LCR tweezers, this one uses a new high integrated scheme, which has higher accuracy and more stable test results. At present, it supports 100 / 120 / 1k / 10kHz, 0.5 and 1V excitation signal and impedance measurement, such as ESR,D,Q... The structure design of these LCR tweezers is much more stable, and the user experience is more like precision tweezers.



Cap Measurement Noise performance video
The screen measurement data update rate is 2 samples per second, which is much faster than the other high precision SMD testers, and there are about 100 samples record for 5pF cap measurement, 6fF peak to peak noise performance



Features as the attached image, continuous updating


These are the test results for precision resistors and caps at this moment:
The DUTs were Vishay S102 serial 1K 0.01%, 20K 0.01%, 100k 0.1%




The DUT is 5pf + 0.5pf @ 10kHz and 10nf 1% @ 1kHz MKP capacitors

tautech:
Will it have an Auto mode ?
When measuring electrolytics ESR should be displayed.

What battery technology are you planning on using ?
Can you fit a tiny battery level bar meter on the display or will you just pop up a battery low warning ?

S. Petrukhin:
When and at what price do you plan to sell?

Shannon:

--- Quote from: tautech on February 21, 2021, 12:26:59 am ---Will it have an Auto mode ?
When measuring electrolytics ESR should be displayed.

What battery technology are you planning on using ?
Can you fit a tiny battery level bar meter on the display or will you just pop up a battery low warning ?

--- End quote ---

Sure, it will have auto mode, which could distinguish the DUT type and recommend the appropriate frequency automatically
ESR  would be implemented with Cap measuring, and Inductor measurement would have the similar Rs function.

We are trying to make it a real LCR meter, support those measurement modes

We use a rechargeable Li-on Battery, the battery level would be displayed on the screen.

Actually, we are focusing on the display now, I don't think it will be long

Type-C Port has been used for battery charging as attached.

tautech:

--- Quote from: Shannon on February 21, 2021, 02:45:13 am ---ESR  would be implemented with Cap measuring,

--- End quote ---
Not in Auto mode ?
My old ST3 tweezers can do ESR in Auto mode.

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