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EEVblog #1336 – DT71 LCR Tweezer Destructive Teardown + Lab Update

Destructive teardown o nthe Miniware DT71 LCR meter Tweezers Plus a lab move update. Forum: ...

40 comments

  1. You left out one main use for this device and that is debugging. If you work in electronic manufacturing it would be a extremely usefully tool to verify the correct component is installed without having to use a microscope to read the stamped value on that part.

  2. Nice one Dave.

    Kinda makes me wish I was one of those “well heeled” hobbyists!

    Really neat piece.

  3. It’d be nice if the firmware was upgradeable. Maybe then they could inprove some of features.
    Looks like another thing to add to my wishlist and consider for the future.

  4. Nice video Dave!
    I love the product reviews and that bonus tutorial at the end was a great topper! Just what we have come to expect from your super blog.

  5. Great review, as always. Love the ‘tear downs’. I checked it for possible purchase, it runs $300-$600! As much as a Rigol scope. Should be cost effective for high volume troubleshooting considering the time it saves.

  6. http://www.advancedevices.com/docs/Bachiochi-221.pdf Circuit Cellar review.

    I think the plastic tweezer cover is really to stop you from stabbing yourself.

  7. That clip is like a knife sheath mounted on the shoulder. With tweezers spread open it holds itself in the sheath, when you squeeze the tweezer it releases it. Like a knife, just don’t stab yourself in the neck! Its quick to draw, but less quick to sheath.

  8. I think you’re right about the price – it’s pretty much out of range for most hobbyists. $300 is probably not an unreasonable amount of money to spend on a good piece of electronics test gear, but with the $300 saved up I think most hobbyists could think of a lot more things they’d rather spend their cash on before they bought an LCR tweezer meter.

    I’ve got a Peak Electronics LCR meter which works quite well for most basic tasks. It’s quite cheap, too. If I require any real degree of measurement accuracy then I tend to abandon these sorts of instruments and use a proper bench component analyser. We have plenty of this sort of professional test gear at work so I’m fortunate in that respect.

    I agree with “Embedded” about the cover, it’s almost certainly a cover to stop you stabbing yourself when it’s in your pocket.

    Thanks for the review. Out of interest, Elektor Electronics did quite a good review of various tweezer LCR meters a couple of issues ago. For anyone considering buying one of these, it’d be worth checking out the back issue or buying just that single article from the elektor website.

    Brian

  9. Wow! Nice tweezer! Never heard of them before :O
    Unfortunately the price is just too high for me. But maybe it will come down in a few years. But that is one more thing in my wishlist 🙂

  10. G’DAY MATE!!

    Excellent review!! Great tweezers!! The price is a big downside to it, but all things considered as you’ve said is probably right for the market that is targeted.
    Also if you have enough money to spend on a few of this, it can be an original pair of chopsticks!!! Amazing!! Think about it!! you can mesure the capacitance of your sushi!!
    ACE!!

    Hooroo!!

  11. Great review, and thanks for the tutorial also.

  12. Nice one Dave.
    I do agree with you that the price is a little high for the average hobbyist. You didn’t say anything about battery life, though you did mention the re-chargable option.

    Pity about the 10Khz frquency limit for capacitance measurments. I suspect that it could be changed if the CPU could do the calculations quickly enough at 100Khz.

    As far as the voltage and scope display is concerned, maybe a logic probe function would be more useful…

    Regards:

  13. This product is a piece of shit! I can’t believe dave is giving it a thumbs up. I’ve had two of these fucking things and they both broke. This device ruins capacitors. I tested a bunch of taint capacitors on my motherboard the other day and they all turned gay after touching them with this “probe”.

  14. Hi David! Very nice and exhaustive test!

    Could you make the same kind of review for Open Bench Logic Analyzer ? (FPGA based, 32 channel, 200 MSPS, 40 dollars)

    Thank you for your videos !

  15. Great review.
    Price is on the high side but I talked to their sales and was offered a discount code EEV0510 for orders originating from this blog.

  16. Giving that for $361 you can buy the Agilent
    U1732A-SMD LCR meter including tweezers, I’m having a hard time seeing the spending > $300 for the smart tweezers.

    Scott

  17. A few months ago I had a circuit with a blown transistor and was checking to see if rest of SMD circuit was OK with regular probes and accidentally shorted a capacitor and cremated a SMD coil. I did not have a LCR meter and when I saw the SmartTweezers, I thought that was the solution as it would also be easier to use in checking SMD components off and on the board. I saved a few $ by going through e-Bay, but it was still pretty expensive. I guess being a Canadian I also was willing to spend a bit more even though I am more of a hobbyist!! So far they have been great, except for the reservations you mentioned. However I guess the main thing was that you gave them the thumbs up and it made me feel a bit better about having paid that much for them. Keep up the honest reviews.

  18. please don’t sell out, I believe we both know the truth about this product

    • Sell out? are you kidding?
      I told the truth in my review, it’s a rather expensive niche product with some drawbacks, but otherwise fairly handy and well designed. It’s not a tool for everyone.
      I actually use it, it’s rather neat.
      If you’ve got some other opinion then great, how about you share it?

  19. You mention replacing the batteries with an induction recharged battery. Got an example of a commercial product? Or were you talking about using a custom built marriage of a tiny lipo with a coil of your own making crammed into that tiny compartment?

  20. Hello. Could you do a review of this free (well $1 for parts) LRC meter with “auto bias compensation”?

    http://www.sillanumsoft.org/ZRLC.htm

    I don’t quite understand the part of it where you plug the two opamps into the computer directly(???). Doesn’t the opamp +- supply voltage fry the computer! I think I maybe missing something here but the concept is still solid since I’ve seen this before but I didn’t manage to get the other program work since it wasn’t made for modern computers.

  21. Wow, I considered purchasing one of these until I saw the internals,

    Way overpriced IMO .

  22. At time 30:02 “leading” and “lagging” are mixed up. If the current is leading, the DUT is capacitive. If the current is lagging, it is inductive.

    /Hans

  23. Yeah, forget that. Look at the internals!
    The price is a joke. I’ll wait until the chinese equivalent comes out for under $50.

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