Where should I use resistor in this ?

Discussion in 'Homework Help' started by Ghasemzadeh, Nov 19, 2009.

  1. Ghasemzadeh

    Thread Starter New Member

    Nov 19, 2009
    4
    0
    Where should I use resistor in this ?
    I want to why? Can I remove them?
     
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  2. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
    864
    40
    Are you trying to create a dual DC supply out of an AC supply? The image is not at all readable. Is your source actually a transformer?
     
  3. Ghasemzadeh

    Thread Starter New Member

    Nov 19, 2009
    4
    0
    yes,it is simple just my teacher ask me why should we use resistor in this circuit. (I mean 27ohm)
    input is AC 7.3rms 50HZ (sinc)
    [​IMG]
     
    Last edited: Nov 19, 2009
  4. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
    2,040
    287

    That's a voltage doubler circuit. The resistors are probably there to reduce the inrush current if the capacitors are fully discharged. Without knowing the value of the capacitors, it's hard to say if you really need the resistors or not.

    Eric
     
  5. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
    864
    40
    Limiting the current from the supply to the capacitors was going to be my first suggestion as well.
     
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