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Christmas Light Tester

Discussion in 'Beginner Electronics' started by StewieGriffin, Jul 11, 2004.

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  1. I saw an interesting item, an expensive christmas light string tester.
    Apparently, you plug the light string into it, press a button, and the bad
    bulb or socket buzzes. You can see it at

    Any idea how this works (and why it's worth $200)?
  2. Noozer

    Noozer Guest

    Something that generates a large enough voltage spike to jump across the
    broken element, but low enough amperage not to damage the good elements?

    Just a guess.
  3. vincee

    vincee Guest

    I have a vision of the unwary homeowner on his extension ladder under the
    2nd story eave reaching for that buzzing bulb and as the glass seperates
    from the base he finds himself with the 60hz equivelant of an automotive
    ignition coil in his hand.
    Sounds dangerous.
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