Value of a capacitor

Discussion in 'General Electronics Chat' started by Flug540, Mar 24, 2012.

  1. Flug540

    Thread Starter Member

    Mar 24, 2012
    60
    1
    Hi all,

    I'm reverse engineering a circuit board and not sure how to read the capacitors. The first one reads "047Z 25V", the second "1.0 25". Pictures are attached. I think the second is 1uF 25V? The first is more confusing because it has three digits, the third one as I read somewhere supposed to be the multiplier, but multiplier 7 is not defined. Is it 0.47pF?

    Any input is appreciated!
    Thanks!
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,421
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    The first is .047uF or 47nF/25v.
    The second is 1uF/25v tantalum electrolytic.
     
  3. Flug540

    Thread Starter Member

    Mar 24, 2012
    60
    1
    Thanks a lot!

    How do you read them? Can you point me to a link describing how to interpret the markings for future reference?
     
    Rbeckett likes this.
  4. Rbeckett

    Member

    Sep 3, 2010
    205
    32
    Good question Mr Flug. I had the same issue defining the code that is on a lot of components, especially SMD's. Any body got a link to how to interpret electronic component markings? Some are just plain cryptic and make no sense at all, almost seems just arbritrarily given a number that id's it to the manufaturer only.
    Bob
     
  5. MrChips

    Moderator

    Oct 2, 2009
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  6. Braymond141

    New Member

    Mar 29, 2016
    5
    0
    Flug, did you ever finish your project? I know this is 4 years later but I searched the 047z cap in google and was surprised to see you here with a Dinan T9 scaler image.

    I'm working on the same thing. Just curious how far along you got?
     
  7. Braymond141

    New Member

    Mar 29, 2016
    5
    0
    I realize that, but the hope was that he would be notified. A PM probably would have been sufficient but I was also going to post a question shortly after. I wanted to keep that thread alive as it was an identical project, and a rare one at that. Oh well.

    My question;

    There are two resistors on the board.
    R1 - brown, red, brown, brown, brown
    Measures 1.211k
    R2 - blue, blue, green, red, brown, red
    Measures 66.8k

    Plugged into Digi-key they sent me;
    R1: 1.1k 1/4watt 1%
    Measures 1.1k
    R2: 66.5k 0.6watt 1%
    Measures 66.5k
    The colored bands do not match either of my originals. Something I'm doing wrong or not available? Thanks in advance.

    image.jpeg
    image.jpeg image.jpeg
    image.jpeg image.jpeg
     
    Last edited: Mar 29, 2016
  8. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,991
    3,736
    I'm fighting for you - maybe we can get @ronv to comment on some of the work he was doing to help. Mods from not doing that anymore. Unfortunately, a new member like yourself cannot PM with less than 10 posts. So you should reply to this with your comments about starting new posts because you responded to an old post. Then I will answe and so on until you have 10 and you can PM the guy.
     
    JohnInTX likes this.
  9. ronv

    AAC Fanatic!

    Nov 12, 2008
    3,282
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    Hmm, don't know. I'll ask @JohnInTX .
    I was going to send a PM for @Braymond141 but @Flug540 is no longer in the address list. :( Hope he is okay.
     
    JohnInTX likes this.
  10. Wendy

    Moderator

    Mar 24, 2008
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  11. SLK001

    Well-Known Member

    Nov 29, 2011
    811
    224
    Also tell us why you are replacing obviously good resistors. And why did you replace your 1211Ω resistor with a 1.1kΩ instead of a 1.2kΩ?
     
  12. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,991
    3,736
    There us a question about this project on another thread...Isis @Flug540 still out there?

    =====================
    I realize that, but the hope was that he would be notified. A PM probably would have been sufficient but I was also going to post a question shortly after. I wanted to keep that thread alive as it was an identical project, and a rare one at that. Oh well.

    My question;

    There are two resistors on the board.
    R1 - brown, red, brown, brown, brown
    Measures 1.211k
    R2 - blue, blue, green, red, brown, red
    Measures 66.8k

    Plugged into Digi-key they sent me;
    R1: 1.1k 1/4watt 1%
    Measures 1.1k
    R2: 66.5k 0.6watt 1%
    Measures 66.5k
    The colored bands do not match either of my originals. Something I'm doing wrong or not available? Thanks in advance.

    [​IMG]
    [​IMG] [​IMG]
    [​IMG] [​IMG]
     
  13. Flug540

    Thread Starter Member

    Mar 24, 2012
    60
    1
    Hey, Gopher!
    Yes, I'm still around :)
    Can it be that since you are measuring the resistors plugged into the board, the rest of the schematic affecting your readings?
    I don't have the schematic handy so just throwing this out there.
     
  14. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,991
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    Amazing. Thanks for coming back.

    Hey, I am not the one with the questions exactly. There were some gyrations with a Mod - he didn't want this thread coming back from the dead so he split the new member's post from yours (too many details, I'll notify the other guy - maybe his question can be figured out after all these years (I think he is just happy to have the same equipment and same problem you had...

    @Braymond141
    Are you out there?
     
    Last edited: Mar 30, 2016
  15. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,991
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    @Flug540
    - it might be nice to keep the conversation here though. Let's see if @Braymond141 returns.

    Mod edit: snipped dead link - threads are now combined
     
    Last edited by a moderator: Mar 30, 2016
  16. Flug540

    Thread Starter Member

    Mar 24, 2012
    60
    1
    Ah, ok, thanks!
     
  17. Braymond141

    New Member

    Mar 29, 2016
    5
    0
    No on them being plugged, they read the same in or out.

    What came of your project? I sourced everything to replicate the T9 down to the amp connectors. Just the available resistors I'm finding difficult.
     
  18. Braymond141

    New Member

    Mar 29, 2016
    5
    0
    Not replacing, just copying the whole part. It is a MAF scaler used in a supercharged application to handle the increased air. The company no longer supports their 90's products.

    I did my resistor search based on the band colors. The new resistors are what digi-key said were correct.
     
  19. SLK001

    Well-Known Member

    Nov 29, 2011
    811
    224
    Who at Digi-Key said they were correct? A 1.2kΩ is a common part that is "more correct".
     
  20. JohnInTX

    Moderator

    Jun 26, 2012
    2,341
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    Mod note: The thread was split. Upon review, since the new question follows the original one AND the OP/TS came back, the original thread will continue here with pertinent posts from the split thread.

    Thanks to all for pointing it out.
     
    ronv likes this.
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