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Voltage Doublers

Discussion in 'Electronic Basics' started by Abstract Dissonance, Feb 2, 2006.

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  1. I was just wondering(as always ;) whats wrong with using a voltage doubler
    recifier circuit? (i.e., where you use 2 diodes from the tranformer to
    double the voltage)

    like I have a 25VCT transformer and it would be nice if I could double that
    and use a variable regulator to get me a larger range but I feel that there
    is something about the doublers and so on that I don't know about... The
    only "hint" I have read is that they are mainly used to supply pulses such
    as in photo flashes and such... (hence implying that they shouldn't be used
    continuously?)

    Obviously it changes the ratings of things up and stuff(have to use larger
    filter caps and worry about increased power dissipation and things like
    that)?

    My gut feeling is that the ripple is probably doubled too(hence for, say, a
    quadrupler it would take time to recharge the caps hence a big dip).

    Just for fun, could I use like a 20x to get the voltage real high if I had
    the diodes and caps that could handle those voltages to, say, make a big
    spark? ;)

    Thanks,
    Jon
     
  2. John Fields

    John Fields Guest

     
  3. larya

    larya Guest

    I am sure that you are aware that in using the voltage doubler you are
    also halfing the current..... you can have your cake and eat it to....
    the more you double the voltage the more you half the current.....
    Larry ve3fxq
     
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