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Capacitance needed to stabilize a voltage pulse

  1. Aug 20, 2012 #1
    ok i need to know the value of the capacitor which i need.

    i have a pulse voltage of 6mV which i want to stabilise to create a voltage which will power a small L.E.D. i currently have a bridge rectifier and i know i need a capacitor but what would the value of this capacitor be.
     
  2. jcsd
  3. Aug 20, 2012 #2

    davenn

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    Re: capacitance.

    6mV isnt going to power a LED... LED's are current driven ... ie. you need a constant current at a given voltage the common 5mm diameter LEDs require ~ 20mA

    you had better expand a bit on where your 6mV is coming from
    you are really going to need a few volts or so

    Dave
     
  4. Aug 20, 2012 #3

    berkeman

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    Re: capacitance.

    Maybe he means 6V pulse like in his old thread?

    https://www.physicsforums.com/showthread.php?t=622069

    .
     
  5. Aug 20, 2012 #4

    davenn

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