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circuit to show how much treble or bass

Discussion in 'General Electronics Discussion' started by tedstruk, Jul 16, 2017.

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  1. tedstruk


    Jan 7, 2012
    This is my idea for a guitar tone control... but I would have alot better control with an eprom set to fire 65000 different capacitances....
    so I want to build a digital version with more lights! toneillu.jpg
  2. tedstruk


    Jan 7, 2012
    needs resistance to fire each individual cap....
  3. kellys_eye


    Jun 25, 2010
    Google 'audio spectrum analyser'.

    Using a simple op-amp you can make a filter (or multiple filters) for the bands you want and the LED is usually a 'column' that indicates the level of signal.

    For single frequency bands (simple lo/hi) you could use the LM3915 to drive a bar graph LED display (use two - one for lo, one for hi).

    If you want the full audio spectrum then look for a dedicated device - they do exist.

    Here's one using LEDs

    and here's one using a colour LCD panel
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Firing caps? Do you have a starting pistol somewhere in that circuit?

    I'm not sure you don't understand EPROMs or capacitors, and frankly I'm not sure about your understanding of resistors.

    You need to ask questions rather than sprouting non-sequiturs.
  5. OBW0549


    Jul 5, 2016
    That circuit isn't going to "control" anything; all it will do is flash some LEDs (maybe, if you're lucky).

    That makes absolutely ZERO sense. It's a good example of what I call "voodoo electronics," in which a person who has no understanding of electronics believes stuff happens by magic.

    Forget it. All you'll end up doing is wasting money, parts, electricity and time-- yours as well as ours.
  6. Audioguru


    Sep 24, 2016
    I have many blinking and colors-changing LEDs all over my home and my yard. I have a sound level indicator in my family room but it is not a spectrum analyser. My experience and understanding of electronics make the magic for it to happen.
  7. kellys_eye


    Jun 25, 2010
    .... and WTF is 'ghostown-usa Classic Clicks internet developments'??

    Who-, or what-ever they are they haven't got a diddley clue about schematics....:rolleyes:
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