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Problem with constant dc supply by capacitor

  1. Feb 21, 2013 #1
    I have a problem
    how can i obtain a constant value of dc voltage from a capacitor(dynamo) to supply a device..
    As we know if the capacitor is directly connected to the device, the voltage will drop and the device will not have enough voltage to function.
    what is a better way?
     
  2. jcsd
  3. Feb 21, 2013 #2

    Simon Bridge

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    voltage regulator.
     
  4. Feb 21, 2013 #3

    nsaspook

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  5. Feb 21, 2013 #4

    berkeman

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    Staff: Mentor

    Or you can use a SEPIC DC-DC converter, which would allow you to have the capacitor voltage initially above the output regulated voltage, and as the capacitor discharges, its output voltage can fall below the output regulated voltage:

    http://en.wikipedia.org/wiki/Single-ended_primary-inductor_converter

    .
     
  6. Feb 25, 2013 #5

    Simon Bridge

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    @Apache: any of this help at all?
     
  7. Feb 28, 2013 #6
    Yup, I have fix a voltage regulator in my circuit, thanks!
     
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