convert 0.12 vac to dc

Discussion in 'The Projects Forum' started by madhusuthanan, Sep 1, 2012.

  1. madhusuthanan

    Thread Starter New Member

    May 30, 2012
    5
    0
    hi all,
    I've current transformer(CT) which has 0.24VAC @ 4A & 0.12VAC @ 2A. I need to convert it to nice DC. can any one help me?
     
  2. #12

    Expert

    Nov 30, 2010
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    6,852
    Google, "precision rectifier".
     
  3. wayneh

    Expert

    Sep 9, 2010
    12,156
    3,063
    Are you wanting to power something, or just amplify and/or measure a voltage?
     
  4. DickCappels

    Moderator

    Aug 21, 2008
    2,664
    634
    I guess to add to that, if you want to convert it to measure it, what do you want to know about it?

    A. Peak value
    B. Peak-to-Peak
    C. Average
    D. RMS
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    It would be helpful to know what the frequency of your AC is.
    If it's 47Hz to 63Hz (typical range for mains power) then you'll need larger filter caps than for higher frequencies.

    A precision rectifier will convert the AC to rippled DC.
    You need to define what you mean by "nice".
     
  6. Manish Anand

    New Member

    Jun 13, 2011
    5
    0
    [​IMG]Since the AC magnitude is low first you can use a voltage multiplier [Cascade connection of voltage doublers]circuit to convert this low magnitude AC into DC.
    Google voltage doubler circuit.
     
  7. crutschow

    Expert

    Mar 14, 2008
    13,056
    3,245
    A voltage doubler circuit won't work for 0.24v which is below a diode drop.
     
    #12 likes this.
  8. #12

    Expert

    Nov 30, 2010
    16,355
    6,852
    The, "Thanks" is for saving me the time it would take to type that answer.

    This is beginning to look like a drive-by question.
     
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