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LCR Tweezer Fnirsi ST1 vs. Zoyi MD1

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mawyatt:

--- Quote from: awakephd on October 09, 2024, 01:09:33 pm ---
I apologize - I did not mean to be misleading! I actually earned my PhD 24 years ago, but in the humanities; I teach / serve as a Dean at Campbell University in central North Carolina. The university has a relatively new (~10 years old) School of Engineering, and I am finally getting a chance to fulfill a long-standing desire to sit in on a circuits class. Despite my professional focus on the humanities, I have been tinkering with designing / building circuits for 40+ years, and while I have generally succeeded in building something that works, I have always been painfully aware of how much I am "guessing" at design choices or at values to use (e.g., for a simple RC filter to quiet the bounce on a mechanical switch). Or as I often say, I have worked by trial and lots of error. :) Thus far, the class has been extremely enjoyable and has already filled in quite a few of the gaping holes in my knowledge. And this forum is adding to my knowledge as well!

--- End quote ---

That must be fun to sit in on an area you are interesting in learning about :-+

Electronics is fascinating, has been for us for almost 7 decades ;)

If you are interesting in better understanding of things try approaching from a fundamentals standpoint. Learn the basics in detail, then proceed with the application of such.

It lots of fun to sketch out a simple circuit on the back of an envelope, write a few equations, note some bias voltages/currents and waveforms. Then build on a protoboard and have it work 1st time without resorting to Google or LTspice, just pen, paper and trusty old HP calculator ;)

It's also fun being around young minds, you can spot the potential stars. When an Adjunct creating and teaching 1st advanced graduate classes in RFIC design we spotted those students and hired them (inside advantage)  :-+

Best

awakephd:

--- Quote from: mawyatt on October 09, 2024, 01:39:20 pm ---That must be fun to sit in on an area you are interesting in learning about :-+

--- End quote ---
It has been very fun! With the professor's permission, I have been doing all of the work - homework, labs, quizzes, exams - it has been a great reminder to be on the student side of things. As dean, I oversee a graduate/professional program, and nearly all of our students are working significant hours, many with full-time jobs, families, and life responsibilities. I am planning to recommend to my faculty that they look for a class that they would sit in on, just to remember what it is like to be a student while juggling a full-time job.

--- Quote from: mawyatt on October 09, 2024, 01:39:20 pm ---If you are interesting in better understanding of things try approaching from a fundamentals standpoint. Learn the basics in detail, then proceed with the application of such.

--- End quote ---
Indeed! The course I am taking has proven to be "just right" in terms of what I already knew vs. what I need to learn. I have long been conversant with things such as Ohm's Law and the principles of how BJT and MOSFETs work. The class I am taking is more or less a "part two" class on circuits - the first class having introduced students to the things I have painfully learned (mostly) over many years. I was a bit concerned that my math skills would be too rusty; once upon a time I loved maths up through Calculus, but it has been many, many years since I have worked out a significant integral or derivative. So far, however, I am finding that what I have needed mathematically has come back quickly, and it has renewed my enjoyment of math. One thing that has been particularly interesting to observe is that often I know the practical implications / applications that the students know only in theory (and I may only now be learning the theory). For example, I've blown up more than my fair share of MOSFETs along the way, so when we discussed h-bridges and the problem of shoot-through, I could have testified!

DaneLaw:
In regards to the zero/relative-feature on Fnirsi ST1.
On lower values fx 10mOhm from traces' it seems to relative that value on top, every time you hit it, a power cycle will remove that offset.
https://i.imgur.com/Muc3Zzr.mp4

While on bigger values fx 100mOhm it does seem to null it.
Tried to zero it on 100mOhm res (before the video starts), and the corresponding reading does cycles down around 0mΩ
https://i.imgur.com/ADMl0BR.mp4

elantric:

--- Quote from: Feuerbard on September 28, 2024, 08:58:56 pm ---New one

https://www.banggood.com/ru/LCR-1S-Smart-Tweezers-LCR-Tester-100kHz-CNC-Metal-Case-High-Accuracy-Portable-1_47-inch-Color-Display-Intelligent-Auto-Range-Function-p-2022417.html?akmClientCountry=MD&cur_warehouse=CN&ID=6329370&rmmds=search (Attachment Link)

--- End quote ---

QPLink LCR TWEEZERS
https://www.eevblog.com/forum/testgear/qplink-lcr-1s-smart-tweezer-(100hz-120hz-1khz-10khz-100khz)-50$/

tigrr:

--- Quote from: elantric on October 21, 2024, 07:37:44 am ---QPLink LCR TWEEZERS
--- End quote ---
QPLCR User Manual - PDF, 1.58 Mb https://mega.nz/file/I5UABC6C#jVBlZjjKRdjQ-qyR2wumsVWKOKlYn0bU0DAoV51bvQk

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