LED reactive Speaker

Discussion in 'The Projects Forum' started by xcrnr, Apr 16, 2014.

  1. xcrnr

    Thread Starter New Member

    Apr 15, 2014
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    0
    Here is the circuit i have so far
    Circuit.jpg
    Do you think it would work?
    Im new to electronics, i would like the speaker to play music that is connected to an ipod and the LEDS to flash to the beat.

    Like i said im new to electronics, so any simplifying would be great
    Thank You
     
  2. Veracohr

    Well-Known Member

    Jan 3, 2011
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    76
    I think maybe that's much TOO simple for what you want. If you want the LEDs to flash JUST to the beat, you would have to filter the audio so that the LEDs will only respond to the frequency range that the 'beat' occupies (which can vary depending on the music). Also, since kick drums and bass instruments occupy the same frequency range, you would need some kind of peak detector circuit that would trigger a pulse when a drum hit causes the overall bass frequency level to rise above the average level between drum hits, and use that pulse to flash the LEDs.
     
  3. ronv

    AAC Fanatic!

    Nov 12, 2008
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  4. xcrnr

    Thread Starter New Member

    Apr 15, 2014
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    But It would work right????
     
  5. ronv

    AAC Fanatic!

    Nov 12, 2008
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    Sure. At least I think so. Post your circuit before you turn it on.
    PS the battery won't last to long.
     
  6. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    The center pin on your TIP31 is the collector (NPN). You need to exchange right and center connections on that transistor.
     
  7. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    You will need a capacitor between your speaker and monolithic amp chip.

    You also need to explain what your current cap and 1k resistor are going to do (what you hope for them to do).
     
  8. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    What you posted is what you were given in post number 7 of this thread.
    http://forum.allaboutcircuits.com/showthread.php?t=96684

    Why do you keep starting new threads on the same question?
     
  9. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    If you do not wish to build an amplifier, Radio Shack has one-Mini audio amplifier # 277-1008C or similar, US $ 11.99, 1999 cat.
     
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