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Fiber optic decorations damaged by high voltage?

Discussion in 'Electronic Repair' started by Mike, Dec 5, 2003.

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  1. Mike

    Mike Guest

    I have these relatives who have a bunch of fiber optic Christmas
    decorations, which have suddenly stopped working. The decorations said
    to set the universal adaptor to something like 6 volts and the
    relatives accidentally set them to 8 volts. Everything seemed to work
    fine but then after a few minutes we noticed that the colors were
    wrong. They're supposed to change from like blue to red to yellow to
    orange to green to purple or something like that. But the orange,
    yellow, and, red wouldn't work. I realized that it was set to the
    wrong voltage and changed it to the correct setting. But the colors
    still won't work. After a little while the whole thing stopped
    working. Is it most likely that setting it to the wrong voltage
    damaged these decorations? Is there anyway to repair them or would
    that not even be worth it? I think they cost under $30. Not sure
    though.
     
  2. Jerry G.

    Jerry G. Guest

    You may have burned out the electronics and maybe the LED's. You would be
    cheaper off to replace the complete tree, or whatever it is.

    Only use the original supply that is recommended for it. These are easily
    damaged.

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    =========================================
    WebPage http://www.zoom-one.com
    Electronics http://www.zoom-one.com/electron.htm
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    I have these relatives who have a bunch of fiber optic Christmas
    decorations, which have suddenly stopped working. The decorations said
    to set the universal adaptor to something like 6 volts and the
    relatives accidentally set them to 8 volts. Everything seemed to work
    fine but then after a few minutes we noticed that the colors were
    wrong. They're supposed to change from like blue to red to yellow to
    orange to green to purple or something like that. But the orange,
    yellow, and, red wouldn't work. I realized that it was set to the
    wrong voltage and changed it to the correct setting. But the colors
    still won't work. After a little while the whole thing stopped
    working. Is it most likely that setting it to the wrong voltage
    damaged these decorations? Is there anyway to repair them or would
    that not even be worth it? I think they cost under $30. Not sure
    though.
     
  3. James Sweet

    James Sweet Guest

    Are these the old type with the rotating color wheel and the halogen lamp?
    If so maybe you melted down the color wheel, either way you may as well
    crack one open and see what's inside.
     
  4. Mike

    Mike Guest


    These are the newer ones. No lamps and no color wheel. I opened it up
    and well it doesn't look like something the average person could fix.
    It appears to be something only an electronics expert could fix.
    Probably not even worth getting it fixed. It's basically a little barn
    with a few small trees around it. The fiber optics are sort of weaved
    through parts of the barn and the trees are fiber optic too. I guess
    that'll teach them to read the correct directions next time.
     
  5. James Sweet

    James Sweet Guest

    It's probably just an RGB LED with a microcontroller to cycle the colors.
    You can buy those LED's for a few dollars and there's free code out there to
    program a PIC to drive them, so someone could repair these things if they
    really felt like it.
     
  6. I doubt you damaged them, if the cable has any microbends the fibers may have
    been damaged, but since you receive partial spectrum this problem is most
    likely in the alignment of or intensity of your light source. If there is
    access to the light source ensure the path of light isn't obscured, and the
    surface of the light source is clean, surface to surface mating of cable fiber,
    and no air gap between surfaces
     
  7. James Sweet

    James Sweet Guest

    Actually he said this is the newer type using an LED light source, the
    symtoms are what I'd expect from an overdriven LED, possibly failure of the
    driver circuit as well. The fibers themselves are fine I'm sure.
     
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