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Ready-built ESR meter- I need *your* opinion on price.

Discussion in 'Electronic Repair' started by Bob Parker, Aug 24, 2003.

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  1. Bob Parker

    Bob Parker Guest

    G'day,
    A good friend of mine in Europe is planning to manufacture and sell
    an improved version of the ESR meter I designed. Problem is, he's not
    sure how much it should sell for.
    I've got a photo, some details of it and what I think is a good
    price at http://bob.parker.web1000.com/euroesr.htm
    Could you please take a look and give me your valuable comments?
    Thanks! :)

    Cheers,
    Bob

    Hate spam? Go to http://www.bluebottle.com (It's free)
     
  2. But I thought yours was perfect. :)

    What's different besides the much cooler case and better test leads?

    --- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
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  3. Tweetldee

    Tweetldee Guest

    Hi Bob,
    I think your suggested price , BUILT and CALIBRATED!!! of $80 USD is
    fantastic. Considering that the best price that I have seen for the current
    built and tested version of the DS ESR meter is around $99 USD. And it
    doesn't have the input protection and the nice test leads!!
    If I didn't already have one of the current version, I'd certainly buy one.
    That is, unless the new version were to be offered in kit form too.

    Cheers,
    --
    Tweetldee
    Tweetldee at att dot net (Just subsitute the appropriate characters in the
    address)

    Time is what keeps everything from happening all at once.
     
  4. BJohnson

    BJohnson Guest

    I have both the Capacitor Wizard and the CapAnalyzer 88A and paid $180
    for each..... Based on that, I would say you price is very
    reasonable.... Good Luck...... Bill
     
  5. Eric

    Eric Guest

    Have you got a chart for battery internal resistance?



    : G'day,
    : A good friend of mine in Europe is planning to manufacture and sell
    : an improved version of the ESR meter I designed. Problem is, he's not
    : sure how much it should sell for.
    : I've got a photo, some details of it and what I think is a good
    : price at http://bob.parker.web1000.com/euroesr.htm
    : Could you please take a look and give me your valuable comments?
    : Thanks! :)
    :
    : Cheers,
    : Bob
    :
    : Hate spam? Go to http://www.bluebottle.com (It's free)
     
  6. Bob Parker

    Bob Parker Guest

    Thanks Bill and everyone else for your very positive feedback. I'll
    pass it all on to my friend to reassure him that he will be able to
    make a bit of a profit from making his meters after all. :)

    Regards,
    Bob

    Hate spam? Go to http://www.bluebottle.com (It's free)
     
  7. Bob Parker

    Bob Parker Guest

    I've got an "under the hood" photo of the innards of that ESR meter
    on that web page now, so you can see how well it's constructed. Hit
    Ctrl/refresh if you can't see it.

    Bob

    Hate spam? Go to http://www.bluebottle.com (It's free)
     
  8. John Bachman

    John Bachman Guest

    The only problem I have with it is that there is nothing to limit the
    discharge current through the diodes. Exceed the dv/dt rating of the
    capacitor under test and it might be damaged.

    The meter is supposed to find bad caps, not create them.

    JMHO

    John
     
  9. Bob Parker

    Bob Parker Guest

    G'day Mate!
    Yeah, that is a concern. These kinds of things are always a
    compromise... put in better protection and then it won't fit in the
    nice small case.
    The (re)designer of the meter into this form decided that
    compactness outweighed the simplicity of the protection circuitry. If
    a cap is damaged by a massive discharge current pulse, at least the
    ESR meter should show that it needs to be replaced after the
    accident....

    Cheers,
    Bob

    PS- I haven't forgotten about you know what. This internet is the
    worst distractor from getting anything done which has ever been
    invented. :(



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  10. JURB6006

    JURB6006 Guest

    I'll take one, maybe two.

    JURB
     
  11. Geo

    Geo Guest

    I cant see anything :-((
    http://bob.parker.web1000.com/euroesr.htm

    just keeps bringing up http://www.web1000.com/ main page

    help?

    Geo
     
  12. Bob Parker

    Bob Parker Guest

  13. Site works fine here if with (gasp!) java turned off. :)

    BTW, how large a charged cap do you figure those diodes will survive?

    Maybe they should be replaceable like a fuse. :)

    --- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
    +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
    | Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

    Important: The email address in this message header may no longer work. To
    contact me, please use the Feedback Form at repairfaq.org. Thanks.
     
  14. John Bachman

    John Bachman Guest

    Try our DSESRSavr. It is a small circuit board that protects the
    circuitry including the micro from damage from charged caps. Lets the
    meter work fine, controls the cap discharge current and protects the
    ESR all at once. It will fit inside the DS meter - a little snug but
    it fits.

    We developed it for the Capacitor Wizard which is not as rugged as the
    DS meter and then created one for the DS meter also.

    See it at www.anatekcorp.com/testequipment/dsesrsavr.htm


    John
     
  15. Hi again Bob: I'll give you just 3 guesses which ESR meter can and
    has checked the ESR of fully charged batteries in ? ;-)
     
  16. Bob Parker

    Bob Parker Guest

  17. Tweetldee

    Tweetldee Guest


    Bob, are we to understand that this version is not available outside the
    countries listed on the order page (Austria, Belgium, Denmark, Finland,
    France, Italy, Luxembourg, Spain, Sweden and Switzerland)?

    --
    Tweetldee
    Tweetldee at att dot net (Just subsitute the appropriate characters in the
    address)

    Time is what keeps everything from happening all at once.
     
  18. We sell assembled kits here in Canada...but ours is the original DS
    kit... Looks much the same AFAIKS, except for case - and he has added
    the two high current diodes across the inputs to protect the meter
    from charged capacitors

    http://www.flippers.com/esrkthnt.html

    His box looks much nicer than the DS one though...

    John :-#)#

    (Please post followups or tech enquires to the newsgroup)
    John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
    Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
    www.flippers.com
    "Old pinballers never die, they just flip out."
     
  19. Bob Parker

    Bob Parker Guest

    Bob, are we to understand that this version is not available outside the
    G'day,
    As far as I know, he's selling them to anyone anywhere who wants
    one. That list of countries only applies to one particular method of
    payment. I've told him that what he's written is confusing people and
    to please change it. This is his first attempt at doing a website,
    plus his English isn't perfect. :)

    Cheers,
    Bob
     
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