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Thread: Max Load 422w. Surely this is unsafe?

  1. #11
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    Cheap PSUs are an excellent source for diodes, transistors, inductors, and electrolytic capacitors (as long as you don't mind low quality). Plus if it's a half-bridge unit you usually get a step-down transformer suitable for a +5V PSU (for the +5VSB) and a 1:1 isolation transformer. If you get really thorough then you can also get zener diodes, ceramic caps, and large thru-hole resistors. On slightly higher-end ones you can also find optocouplers.

    Don't bother with most of the SMT stuff, or thru-hole 1/4W resistors. Too much of a pain to desolder and sort.



    PS: A couple weeks ago I took apart a cheap PSU that was full of lime-green "Anodia" capacitors. Anyone familiar with this brand? I've never heard of them.

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    Anodia is quite an unknown brand, but I have only ever seen them used in newer Solytech built power supplies.

    Also, almost all power supplies have optocouplers. Half-bridge units with two transistor 5vsb circuits will usually have one (such as this unit, where it is labeled IC4.)
    Quote Originally Posted by JFK
    The American, by nature, is optimistic. He is experimental, an inventor and a builder who builds best when called upon to build greatly

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    Quote Originally Posted by jack-o-bytes View Post
    Here is a shot of the label. It is a DRAGON power supply
    Of course!! It would even breathe fire when it fails!!
    No wonder it doesn't work! You installed the coils backwards

    Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium.

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    Quote Originally Posted by 370forlife View Post
    Anodia is quite an unknown brand, but I have only ever seen them used in newer Solytech built power supplies.
    Eh, we'll see. They're in my spare caps drawer. I measured some of them with the Fluke and they're all around 80-90% of the rated capacitance, which is inside tolerance (barely). Figure they'll do for projects, but I wouldn't use them in anything that needed any semblance of reliability...

    Also, almost all power supplies have optocouplers. Half-bridge units with two transistor 5vsb circuits will usually have one (such as this unit, where it is labeled IC4.)
    I've met a few that didn't, or else I just missed them.

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    I have a couple of tin cans full of scavenged caps. One is for the Jap brands, one is for the low quality ones. Usually I empty out the low quality tin into a fire once in a while.
    No wonder it doesn't work! You installed the coils backwards

    Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium.

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    Quote Originally Posted by CM Phaedrus View Post
    I've met a few that didn't, or else I just missed them.
    Well... if they don't then all your components blow up if your primary side fails.

    Of course, those who advertise 300W power supplies as 750W power supplies don't care, sooo......

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    Let's see, brands in my cap drawer...

    Panasonic
    Nippon Chemi-Con
    Rubycon
    Teapo
    OST
    Anodia
    CapXon


    Meh, they'll do. Although I have more 16/20/50V 2200uFs than I know what to do with... Seems to be the most popular value for filter caps.


    @Jonny

    Some of the units in question had both primary and secondary components burned, so seems likely.

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    I love scrapping low end PSU's

    I usually take the input caps if they are 560uF or above, I take the switchers if they're 13009 or higher, any schottkys 20A or higher, bridge rectifiers 6A or higher, diodes, PI coils, standing resistors, SATA cables, usually the fan. Rarely but sometimes the heatsinks

    There's always something worth grabbing in almost any PSU

    @Phaedrus
    I would chuck the CapXon, I think they're worthless for anything. I've seen them fail just decoupling...

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