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How to make a LED flash together with the music BPM

Discussion in 'Electronic Basics' started by [email protected], Mar 30, 2007.

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  1. Guest

    Hi, i was wanting to construct a simple circuit where a led would
    flash together with a Music BPM. Does anyone knows how it can be done.
    And what will i need to buy?
  2. GM

    GM Guest

    Just a simple idea, so I am not sure but you'd probably need to pass the
    signal through a Low Pass filter since the beat is at low frequencies of the
    audio spectrum and then you could feed it to a BJT that controls the current
    passing through the LED.

  3. Bob Masta

    Bob Masta Guest

    Google for "color organ". These usually have 3 or more frequency
    bands, but you will get the idea. Just build the low band if you only
    want the bass beat.

    Best regards,

    Bob Masta

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    Scope, Spectrum, Spectrogram, Signal Generator
    Science with your sound card!
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