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Meter schematic - fsm3.jpg (0/1)

Discussion in 'Electronic Design' started by Paul Burridge, Dec 23, 2003.

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  1. Here it is, chaps, enjoy....
     
  2. I read in sci.electronics.design that Paul Burridge
    >) about 'Meter schematic - fsm3.jpg (0/1)', on Tue, 23 Dec
    2003:
    You CAN'T post a binary here; most servers will strip it off. Put it on
    a.b.s.e or your web page.
     
  3. Something's gone wrong, John. It was supposed to get posted to abse
    only but not all of it came out from what I saw of the transfer status
    monitor. Unfortunately, it appears Google don't provide access to this
    forum any more as I can't find it to check. I *will* post it to my
    website if necessary, but can anyone else confirm if Google has
    dropped abse? (and if you do find it, please take a look to see if my
    attempts to upload the schematic succeeded. Thanks
     
  4. Google doesn't carry ANY binaries newsgroup, including ABSE.

    --
    2 days!


    Michael A. Terrell
    Central Florida
     
  5. Google does not carry any binary newsgroups.
     
  6. Jim Thompson

    Jim Thompson Guest

    Paul, Why don't you E-mail it to me and I'll put it up on my webpage
    and post the URL?

    ...Jim Thompson
     
  7. I thought that was a great idea, Jim., so implemented it only to find
    that all my efforts were thwarted. I shall have to address this
    problem in the morning, wereupon I hope to have a few more working
    brain cells. :) Wine! Who needs it? :):):)
     
  8. Jim Thompson

    Jim Thompson Guest

    Hey! I'm starting my second glass and I'm still running up and down a
    ladder hanging ornaments. (We will celebrate our family get together
    this year on Friday the 26th so that all family members can get here
    ;-)

    ...Jim Thompson
     
  9. Jim Thompson wrote...
    Some people have multiple celebrations. For example our
    neighbors are all setup for tommorrow afternoon. Some in
    that family may well go from the 24th to the 25th and 26th.
    Eventuially it may seem a chore.

    Thanks,
    - Win

    whill_at_picovolt-dot-com
     
  10. Jim Thompson

    Jim Thompson Guest

    Family is never a "chore".

    We juggle our get-together date to accommodate older grandchildren
    that want their own "at-home" Christmas, a prosecutor that may draw
    holiday murder duty, a water-services manager on high-alert, etc.
    Just your ordinary regular American family ;-)

    ...Jim Thompson
     
  11. I read in sci.electronics.design that Winfield Hill
    Indeed. Last year, I had four days consecutive, at different places. I
    needed eight days to recover. This year, it's one and a quarter days,
    but still at three different places.
     
  12. I've finally managed to get the blasted thing up on the following URL!

    http://www.burridge8333.fsbusiness.co.uk/fsm3.jpg


    I suspect the 380 ohm load (which is the meter) is loading it down a
    bit, though. :-( Should I add a follower stage?
     
  13. Al

    Al Guest


    We celebrate The Twelve Days of Christmas.

    Al
     
  14. I read in sci.electronics.design that Paul Burridge
    >) about 'Meter schematic - fsm3.jpg (0/1)', on Wed, 24 Dec
    2003:
    I can't find it:

    Index of /
    Parent Directory
    bot1.jpg
    bot2.jpg
    bot3.jpg
    bot4.jpg
    bot5.jpg
    contents.txt
    photo1.jpg
    photo3.jpg
    photo6.jpg
    photo7.jpg
     
  15. Alternatively,

    Adding a coupling cap to the final diode(!) and changing to a schottky
    diode improves meter sensitivity a bit more and gets over the loading
    problem above. See:

    http://www.burridge8333.fsbusiness.co.uk/fsm(revision1).jpg

    The simulation showed 11mV p-p output across the load resistor for the
    100uV p-p source. Not bad in three simple stages...
     
  16. That's the right index contents alright. But I get the new file(s)
    shown in addition - and they display okay. So I can only imagine your
    server hasn't caught up yet? They are definitely there, though. Keep
    trying!
     
  17. I've just re-checked and the first one isn't there for some reason. My
    apologies. Very odd. Never mind, the fsm(revision1) pic is probably
    the better of the two to look at, anyway.
     
  18. I read in sci.electronics.design that Paul Burridge
    >) about 'Meter schematic - fsm3.jpg (0/1)', on Wed, 24 Dec
    2003:
    The filename is not 'fsm3.jpg' now , is it?

    I can see neither rhyme or reason in the biasing, but at least you
    haven't got anything bottomed now. Your AC coupled diode still won't
    work.
     
  19. Jim Thompson

    Jim Thompson Guest

    On Wed, 24 Dec 2003 14:41:33 +0000, Paul Burridge

    [snip]
    You keep missing the point about that coupling cap. HOW does it move
    charge ??

    ...Jim Thompson
     
  20. It moves charge by virtue of having an AC voltage across it. Yes, I
    know it's in series with a diode so that doesn't make sense in this
    case. But try simulating it for yourself if you don't believe me. You
    only have to sim the final stage and apply an arbirary sine source to
    its input to represent the prior stages. Sorry you would know that,
    anyway. But try it! Then tell me it doesn't work...
     
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