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led christmas lights

Discussion in 'Electronic Repair' started by larry, Dec 6, 2003.

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  1. larry

    larry Guest

    Would someone give me a good website which can give me unbiased information
    concerning this new product of LED Christmas lights. I am curious about the
    technical specs., such as current drain. How a d.c. product fits into an
    a.c world.
  2. James Sweet

    James Sweet Guest

    You could always buy a set and measure the current draw yourself. They run
    on AC just fine, LED's are diodes and conduct only one way. Virtually any
    electronic device runs on DC internally.
  3. Steve Reinis

    Steve Reinis Guest

    I have a set of these that I purchased about two years ago at Orchard Supply
    (california hardware store) when they first started showing up. I thought
    how neat they must be, but boy was I disappointed.

    Perhaps the newer ones are better, but these (string of 100 in red, green,
    and amber) are extremely DIM and you can see a flicker in them if you pay
    attention. Not as exciting as I had hoped for @ $15.99 versus $1.99 for a
    string of 100 mini incandescant lights. If they were high-intensity LEDs
    they would be quite spectacular. Especially if the mix included the newer
    blue LEDs.

  4. Bob Parker

    Bob Parker Guest

  5. Andre

    Andre Guest

    You can buy a cheap set and "hack" them to fade, this is easy enough
    using a PIC and a couple of high gain NPN transistors.

  6. Bob Parker

    Bob Parker Guest

    Reminds me of a Monty Python sketch... "To play the flute, just blow
    across here and run your fingers up and down the holes!". :)

  7. Andre

    Andre Guest


    Well, its fractionally cheaper than buying a new set, plus you get to
    choose the patterns which AFAIK you cannot do with the commercial

    If anyone wants pre-programmed PICs that do this, I am making up a
    batch in a week or so.

  8. Bob Parker

    Bob Parker Guest

    What I meant was, for someone with no experience with micros (I
    loosely apply that term to PICs), it'd be one hell of a learning curve
    to go through just to flash some Christmas lights. If you've got some
    PICs already programmed with a schematic of how to make it all work,
    that would be entirely different. :)

  9. Andre

    Andre Guest

    Duh, PIC, whats that :) Sorry, I keep forgetting that not everyone has
    PIC programming equipment and/or experience.


    BTW, its probably cheaper to buy a dozen RGB LEDs from
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