Newbie needs help, designing a sound controlled LED lightning circuit.

Discussion in 'The Projects Forum' started by Haris Kaleem Shah, May 25, 2016.

  1. Haris Kaleem Shah

    Thread Starter New Member

    May 25, 2016
    1
    0
    So I'm wanting to make a lightning system for my PC, that is controlled by the sound of the speakers. The problem is I can't find out a circuit that could do this for me,
    When the Sound is Loud the lights become more brighter/intense, when the sound is low the light become dim,
    I know to use a NPN transistor, cuz a relay will only work as a switch. But will the NPN BJT fill up my condition. I will be experimenting on a speaker and using the current from the wires connected to the speaker magnet as my source of the transistor... Help me out
     
  2. #12

    Expert

    Nov 30, 2010
    16,298
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    Google: light organ
     
  3. Externet

    AAC Fanatic!

    Nov 29, 2005
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  4. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    Sound control LED - 4 bjts and some RC, the original contents is Chinese Version, but I used google translation to translate the page to English.
    [​IMG]

    Here is another one.

    [​IMG]
     
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