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Thread: Soldering Problem

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  1. Default Soldering Problem 
    #1
    Join Date
    Sep 2007
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    Roanoke, VA.
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    318
    First, a pop-quiz.

    Please tell me what is wrong with this picture:



    Anything missing? Anything out of order?
     

  2. Default  
    #2
    Join Date
    Aug 2003
    Location
    Guatay, California
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    514
    For one, I'd say the limiting resistor.
     

  3. Default  
    #3
    Join Date
    Sep 2007
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    Roanoke, VA.
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    I see.....

    Anything else?
     

  4. Default  
    #4
    Join Date
    Aug 2003
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    Guatay, California
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    It's hard to tell from the picture, but the leads may be reversed. Did anyone check to see if it worked before soldering it together? Also did anyone check to see if the diode was rated for 9 volts?
     

  5. Default  
    #5
    Join Date
    Sep 2007
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    Roanoke, VA.
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    When it comes to this kind of material, I'll admit I'm poorly educated. What you see is a "trail run" of miniature lighting I plan on installing into a prop. When I was working on it, the diode did blip some light at first. But that is as far as I have gotten. I know it's not the battery nor bad wires (I've tried several of them). Perhaps I purchased a bad diode? I don't have instructions for this kind of thing, but pictures of something very similar; so I follow those.

    What I want to create is a set of about 5 to 8 LED lights (10mm) running off of a battery source.
    Last edited by Smiley; 03-30-2008 at 08:05 PM.
     

  6. Default  
    #6
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  7. Default  
    #7
    Join Date
    Aug 2003
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    Abcynthiana
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    John is right,
    the limiting resistor is missing.
    And you need to make sure the red lead is attached to the pin that is connected to the flag in the led (HOT).
    You can also use one battery to run 2 leds off of with no problem.
     

  8. Default  
    #8
    Join Date
    Nov 2003
    Location
    Davison, Michigan
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    1,751
    If it blipped and then quit working you probably blew the LED. LED's hooked up in that manner are basically just a short a across your power source.
    Jared Layman
     

  9. Default  
    #9
    Join Date
    Nov 2003
    Location
    Cedar Rapids, Iowa
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    396
    Yeah, the 'blip' is a dead- (ha ha, sorry for the pun) giveaway. You *murdered* a LED. Go get a resistor, and a new LED and try again. Killer.

    -- I
    -------------------------------
    http://www.fx13studios.com
     

  10. Default  
    #10
    Join Date
    Sep 2007
    Location
    Roanoke, VA.
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    318
    Yeah, the 'blip' is a dead- (ha ha, sorry for the pun) giveaway. You *murdered* a LED. Killer.
    Hopefully it didn't have any family.


    And you need to make sure the red lead is attached to the pin that is connected to the flag in the led (HOT).
    Pin? Flag? Whosajigawha?
    Last edited by Smiley; 04-01-2008 at 05:57 PM.
     

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