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Salvaging Parts

Discussion in 'General Electronics Discussion' started by Foxkoun, Feb 5, 2015.

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  1. Foxkoun

    Foxkoun

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    Dec 17, 2014
    So this comes as I look at things lying around the house, I have an old card with some super small LED's. From what I understand it's possible to damage LED's with head, so how would I work around this? I would assume a fine tip solder iron, but those connections are really, really hugging the LED itself.
    Beyond that I've found some extra bits from random dollar store trinkets.
     
  2. Gryd3

    Gryd3

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    Jun 25, 2014
    Almost all electrical components are rated to sustain heat for a given amount of time.
    This is a requirement to be able to solder the parts to the board.
    As long as you are not using excessive heat, or holding the iron on the components for an excessive amount of time, you will be fine.
    Surface mount components can be fairly difficult to work with... you will need some desoldering equipment. (Solder braid, or solder pump/sucker)
     
  3. BobK

    BobK

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    Jan 5, 2010
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    One good reason to salvage components is to improve your desoldering skills. The aim is to remove parts in working order leaving an undamaged board rather than for reuse of those components
     
    davenn likes this.
  5. shrtrnd

    shrtrnd

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    Jan 15, 2010
    I'm old-school, but when I desolder, I attach a 'heat sink' to the lead of the device I'm desoldering.
    They're just metal clips that will absorb much of the heat the device might be subjected to during desoldering.
    You can buy heat sink kits (that offer several different sizes), use an old hemostat that I see plenty of at electronic swap meets or at flea market sales, or even an alligator clip if you have one laying around.
     
  6. garublador

    garublador

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    Oct 14, 2014
    What size are the LED's? At my job we do a fair amount of PCB rework and most of the components are SMT. I don't know of anyone here who has even a decent success rate of desoldering small, surface mount LED's without destroying them. They separate way too easy. It's just not worth the work to try to salvage them when they're so cheap to replace.
     
  7. Foxkoun

    Foxkoun

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    Dec 17, 2014
    they're small, I'd say a little larger than the end of a sharp pencil. As for why I'd salvage, yes to working on skill, but also as I'm limited on budget. I learned the hard way that radioshack is not the way to go for components.
     
  8. BobK

    BobK

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    Jan 5, 2010
    Last edited: Feb 7, 2015
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