Mic driven "color organ" for bass only

Discussion in 'The Projects Forum' started by s2kdemon, May 2, 2009.

  1. s2kdemon

    Thread Starter New Member

    May 2, 2009
    3
    0
    Hi everyone
    I'm new to this forum and I need some expert help on a color organ that I've been trying to make.
    The color organ that I need will have a microphone input (as opposed to a direct connection to a speaker), and will only have a low-pass filter.
    Some details: The input voltage must be 12V DC 2000mA. The output can be 12V.
    The color organ will drive one of these: http://www.superbrightleds.com/specs/FLB.htm

    I can provide any other details!
    Thanks in advance
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    Does the signal only switch the leds or do you want also intensity changes visible?
    What frequency do you want the lowpass filter to be?

    Greetings,
    Bertus
     
  3. s2kdemon

    Thread Starter New Member

    May 2, 2009
    3
    0
    The LED will only switch on. I do not need the intensity to change.
    Is it possible to use a potentiometer to vary the frequency between around 80Hz to 150Hz? If not, around 100 Hz should be OK.
    Thank you!
     
  4. bertus

    Administrator

    Apr 5, 2008
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  5. s2kdemon

    Thread Starter New Member

    May 2, 2009
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    0
  6. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    You are right. In the preamp you can change the gain as needed with a resistor.
    The lower part of the other picture is indeed the lowpass filter.
    On the bottom of the page there is a list of frequentions given.

    Greetings,
    Bertus
     
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