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Trick For Testing SMD Components

By on February 20, 2014









I thought I would share some of my tricks fortesting SMD’s, and hopefully some of you may get some help from them. First, to check them with my Analog or Digital MM’s, I use a small tin that has a thin layer of slightly firm foam inside.


I press the SMD into the foam as in the picture, and it helps keep the SMD steady and from jumping around. And if it does jump around, the tin keeps me from losing the SMD, and we all know how hard it can be to find them…

If I’m not sure what the SMD is, I will check it with my Peak Atlas DCA75 Pro, or some other tester, I solder pieces of wires onto the leads so my grabbers can get a good connection. As you can see in the photos below, I use copper heat sink alligator clips inside the clips on my Helping Hands because they are not as strong and don’t have pointed teeth that may damage the SMD and the wires.


testing smd

atlas dca pro

I hope some of you get some benefit from this.









This article was prepared for you by Robert Calk Jr. from USA  and he is a Hobbyist. He’s been learning Electronics for a year now and really enjoy it. He welcomes any comments and suggestions you care to contribute.


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  1. Chris Johnstone

    September 19, 2015 at 9:22 pm

    Splendid idea Robert.

  2. Gregor

    January 22, 2016 at 11:47 am

    Thanks for the tips!

    • Robert Calk

      January 23, 2016 at 11:22 am

      You are welcome, Gregor. Thanks to Peak Atlas checking SOT-23's is easier with their new adapter. Here is their link:
      I have one and it works great.

  3. mike retz

    January 22, 2016 at 12:22 pm

    great job robert. they make stuff so small these daysyou cant see it. myself i like the old 59 cadilacs !!

  4. Dennis Breda

    January 23, 2016 at 12:05 am

    Great. Thank you for sharing.

  5. gene

    February 1, 2016 at 9:46 am

    I too have been getting serious about electronics for a year or so. mostly monitors and power supplies. any idea where i can find a list of replacement components to stock to be covered for repairs. i have plenty of e caps. it's the transistors, voltage regulators, diodes etc i am not sure about. any help would be gratefully accepted, thanks

  6. Robert Calk

    February 2, 2016 at 1:14 am

    Sorry Gene. The comments are being cut short
    and I'm not sure what you are asking.

    • gene

      February 5, 2016 at 12:59 am

      list of components to stock for repairing electronic equip. for Hobbyist

  7. Robert Calk

    February 6, 2016 at 12:35 am

    The number one problem that I have found
    are bad solder joints. I don't stock much
    except for resistors, capacitors, and common
    components. When I order components like
    bridge rectifiers and IC's, I order 5 or 10
    so I'll have some on hand the next time I
    need one.

  8. Robert Calk

    February 8, 2016 at 1:21 am

    Hi Gene,
    Also, don't forget that I'm just a hobbyist and
    don't need to stock much. If you are wanting to
    be a repairer for making money then you should
    ask Mr. Yong or someone that does repairing as a


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