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guitar controlled light bulbs

Discussion in 'Electronic Design' started by Albina Shatzman, Jan 16, 2004.

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  1. I had this crazy idea to control a lightbulb with my guitar. I was hoping
    that the harder I played, the brighter the lightbulb would be, and I was
    recommended to use a MOSFET transistor and that I'd basically have an
    amplifier. Anyone have any sugguestions on how to design/build this? I was
    hoping to keep it as simple as possible. My own genius idea would be to run
    the guitar signal into the base of the transistor (possible thru an opamp to
    make the signal larger, if needed) and have ac mains go into the collector
    (maybe recitified if it's needed) and then have the lightbulb (just a
    regular one from a hardware store) wired in series with the emitter. Like I
    said, genius.
  2. Scary.....
  3. It's been done a lot already, why not find one of the kits to make it ??
  4. GPG

    GPG Guest

    A bit late, genius:
  5. Bob Stephens

    Bob Stephens Guest

    Radio Shack and Heathkit used to sell "Color Organ" kits that modulated the
    intensity of colored bulbs in response to music.

    sounds kind of nauseating in retrospect.

  6. Tom

    Tom Guest

    This is just a sound to light - they have been around since the invention of the
    thyristor in the 70s.

  7. Rolavine

    Rolavine Guest

    It should be possible to put a low wattage light bulb with a resistor network
    right on the amplifier output. I think a couple of watt bulb rated for
    something like 24 volts dc, should be able to go where the speaker does, just
    start increaseing the volume slowly in your experiment. You could put a high
    wattage 10 ohm resistor in series with the bulb to protect the amp.

    Good Luck.
  8. Go back at least 30 years. High-gm pentodes (gm = 10 mS or more) were
    around from the 4 V heater era, and would run 230 V 60 W lamps from 250
    V DC supplies. It's just that they were very rare in those days, not
    because they were impracticable or very costly. Much of the popular
    music in those days was melodious rather than rhythmic, so the displays
    lacked drama. Classical music offered opportunities, notably the
    'William Tell' overture.
  9. JeffM

    JeffM Guest

    "Color Organ" kits
    Obviously, you aren't doing enough drugs these days.
  10. Bob Stephens

    Bob Stephens Guest

    Reality is for people who can't face drugs.
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