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100X 5V Regulators for $2.32 — Parallax Forums

100X 5V Regulators for $2.32

ercoerco Posts: 20,256
edited 2014-09-06 09:31 in General Discussion
How can them boys do that, just 2.32 cents each? http://www.ebay.com/itm/KDQ16-New-100PCS-WS78L05-78L05-TO-92-5V-100mA-Voltage-Regulator-IC-SSY-2294/121185216575 Sale ends in 7 hours, then you'll pay $2.49!

Ten for $2.57 at Mouser, plus shipping. http://www.mouser.com/Search/Refine.aspx?Keyword=78L05

A 78L05 is good for 100 mA @5V. A lot of sensors still use 5V, even if you're a 3.3V kinda guy. At that price, throw them in your parts bin and you'll break even if you use ten in your whole lifetime. Or consider leaving them to someone in your will.

Comments

  • 4x5n4x5n Posts: 745
    edited 2014-07-09 16:12
    That was to good a deal to pass up. Thanks for letting us know about it!
  • NWCCTVNWCCTV Posts: 3,629
    edited 2014-07-09 17:47
    Even if they are 50% bad, still a good deal!!! Just had to get some.
  • W9GFOW9GFO Posts: 4,010
    edited 2014-07-09 18:01
    eBay user 97k-fancycube wrote:
    "We will carefully test every item before shipment."



    Yeah, sure they will.
  • GadgetmanGadgetman Posts: 2,436
    edited 2014-07-10 00:25
    They're either factory rejects(possibly too many random samples from a production lot failed the test and the entire lot was scrapped) or they're leftover from some schmuck ordering a 2000 set PCBs populated with these and the factory billed them for a 2500 component reel(or whatever count is on a typical reel with T092-sized components), then dumped the leftover on the market to get paid twice for them.

    I'd feel much more secure if they came in some sort of reel or tape...
  • ercoerco Posts: 20,256
    edited 2014-07-10 01:24
    Could well be rejects, that's how China rolls. There's no shortage of sellers, though, in the "hundred parts for under $3" category, so it's not a single isolated blowout.
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2014-07-10 04:42
    Nobody seems to be aware that there are occasions when you have a defective reel or tape. High humidity can cause them to fall apart. An Asia has high humidity which also happens to be great for low static electricity in production facilities.

    I just could be that these were in tapes or reels that fell apart and are 100% good. I don't thiink there is anyone out there that will repackage loose product for customers.
  • LeonLeon Posts: 7,620
    edited 2014-07-10 06:41
    The data sheet for those regulators is here: http://www.datasheet-pdf.com/datasheet/WingShing/718113/WS78L05.pdf.html

    They are made by a company called Wingshing.
  • RDL2004RDL2004 Posts: 2,554
    edited 2014-07-10 07:03
    They are made by a company called Wingshing.

    That explains everything.
  • mindrobotsmindrobots Posts: 6,506
    edited 2014-07-10 07:12
    RDL2004 wrote: »
    That explains everything.

    Can you elaborate on why that explains everything? (some of us aren't in the inner circle as to the evil doings of Wingshing)
  • RDL2004RDL2004 Posts: 2,554
    edited 2014-07-10 07:39
    Actually, they may be one of the best semiconductor manufacturers on the planet and I'm just basing too much on the fact that I've never heard of them.

    I bet Digi-Key sells tons of their stuff. Hmm, no sorry.
    Well, Mouser surely does. Darn, wrong again.

    I wonder why two of the most reputable suppliers of electronic parts don't sell their fine products. Go figure.
  • RDL2004RDL2004 Posts: 2,554
    edited 2014-07-10 07:45
    On the other hand, maybe the Wingshing factory is where all those TI, ST Micro and ON Semi parts are coming from and the joke's on us.

    :):):)

    Lol
  • TorTor Posts: 2,010
    edited 2014-07-10 15:21
    Well..they do say "We will test every item before shipment". Sounds like a lot of work to me, looking at that pile of components.. :)
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2014-07-11 03:20
    When you have 1.2 billion people, it is surprising what you can do { or say ;-) }.

    My days of thinking I need to buy parts by the 100s are over. I still have 25 SX chips, about a dozen Propellers, and so on.
  • ercoerco Posts: 20,256
    edited 2014-07-11 12:03
    Come on Loopy, you're not that old. Stock up, it's Hammer time!

    OTOH, my very old friend says "At my age, I don't even buy green bananas." :)
  • NWCCTVNWCCTV Posts: 3,629
    edited 2014-09-05 23:24
    So, I am debating as to whether I should use a couple of these or a couple step down converters. What would you pros recommend to use with a Ping sensor and an IR receiver on separate circuits?
  • Mark_TMark_T Posts: 1,981
    edited 2014-09-06 04:59
    NWCCTV wrote: »
    Even if they are 50% bad, still a good deal!!! Just had to get some.

    Bad deal - you discover the bad ones when they latch up and fry your whole board. False economy to my mind.
  • Duane DegnDuane Degn Posts: 10,588
    edited 2014-09-06 09:12
    NWCCTV wrote: »
    So, I am debating as to whether I should use a couple of these or a couple step down converters. What would you pros recommend to use with a Ping sensor and an IR receiver on separate circuits?

    These things are all over ebay and work well.
  • NWCCTVNWCCTV Posts: 3,629
    edited 2014-09-06 09:31
    Duane, I have both. I am trying to conserve space so thought I would make a couple of circuits with the regulators. I would have to use 2 of the step down converters and that takes up more space.
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