Lab parts

Discussion in 'General Electronics Chat' started by tindel, Dec 21, 2013.

  1. tindel

    Thread Starter Active Member

    Sep 16, 2012
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    I'm just about out of parts from my college stock and need to buy some more lab stock. Have any of you guys ordered parts on fleabay for general lab stock? It looks like a lot of it comes from China... Some of it looks like low-quality crap, some of it looks like it's okay... I've found these for resistors/caps... before I drop $40 on these... anyone have any advise?

    http://www.ebay.com/itm/281187196766?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

    http://www.ebay.com/itm/251249050635?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

    Does it really take a month to get this stuff?
     
  2. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,991
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    It usually takes several weeks to a month.

    I would not (have not) ordered a E24 set of resistors. 24 values for each decade will leave a lot of unused resistors.

    I would order from a company like Taydaelectronics.com. Resistors are a penny each and order in multiples of 10. Then I would order 50 of the E6 series
    10
    15
    22
    33
    47
    68

    and 20 of the alternate values to make sets of E12
    12
    18
    27
    39
    56
    82

    Somehow Tayda gets them to you in a week or less.


    Storing, finding and sorting through all of the E12 series becomes a pain. So many boxes, bags or trays.
     
  3. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    If you order from EBay patients must have you, 2-3 weeks at best, but the stuff is quite inexpensive and the quality is fine.
     
  4. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    The resistors look like 145 values and 10 of each value?

    Overall value $21 for 1450 resistors is ok, but the problem I see is that common values that you will use a lot (10k, 4k7, 2k2, 470,330,220 etc) will be gone in a couple of weeks.
     
    ErnieM likes this.
  5. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    I don't know about these, but a lot of the 1/4 watt resistors that I get from China have leads that are noticeably smaller in diameter than what I like. I measured them once, but I don't remember the numbers. That being said, I have stopped buying resistors from Jameco for the same reason; some of theirs are just as flimsy. I have standardized on Yageo resistors from Digi-Key.
     
  6. Dr.killjoy

    Well-Known Member

    Apr 28, 2013
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    Fully agreed .....
    I have bought the kits before and the leads are really thin and are a pain to use on a breadboard because the leads are so thin..Next time will be placing an order through mouser for resistors
     
  7. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    My old buddy used to go to flea markets and buy resistors. He bought a whole bunch of 1/4W resistors with the usual color bands to show value.

    We built a bunch of demo boards and when we sprayed them with flux spray to strip the flux off, all the color bands disappeared!:p

    All the resistors were brown and unmarked.
     
  8. BillB3857

    Senior Member

    Feb 28, 2009
    2,400
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    That's even better than putting house numbers on parts! Only problem is that even the house may not know what they are:mad:
     
  9. tindel

    Thread Starter Active Member

    Sep 16, 2012
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    Thanks for the input guys certainly things to think about... pay a penny each or order them from newark/mouser/etc for 3x to 4x the price... hrmm...

    The description about the thin leads was very helpful - sounds like I'm not ordering off of ebay. Sounds like Taydaelectronics.com has the same problem based on the only review of their resistors. I certainly don't want thin leads and prefer spec'd parts.
     
  10. MaxHeadRoom

    Expert

    Jul 18, 2013
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  11. tindel

    Thread Starter Active Member

    Sep 16, 2012
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    Have you ordered these before? Are they pretty well distributed or should I expect the package to have a large portion of just a couple values? How about lead thickness?

    I was really hoping to get 1% 1/4W Metal Films. At 2cents a piece there, that's not too bad.
     
  12. MaxHeadRoom

    Expert

    Jul 18, 2013
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    I have ordered items from Futurlec before but not those, but they appear to be the traditional wire size for 1/4w.
    Drop them an email to confirm it.
    Max.
     
  13. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    http://www.diystompboxes.com/smfforum/index.php?topic=32160.0
     
  14. AllVol

    AAC Fanatic!

    Nov 22, 2005
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    I just received an order from Futurlec that included the resistor pack. It contained values as listed in the link in tracecom's post. Good wire leads, also. I hate trying to use those flimsy leads on a breadboard, but they're okay when cut and soldered.
     
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