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component identification

| E-Waste Grading and Identification
  1. #1
    devo started this thread.
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    component identification

    I know some of you are into breaking down low value boards, and some of you want to, but aren't sure whats what. I thought with the recent break out of skippyism around here I would throw up a post that might be useful to one or two.

    I'm not going to hand hold here, some of the stuff is pretty basic. If it looks like a big ball of copper, it is, take it. I'm hoping to help you identify some of the harder hidden stuff. Before I was a carpenter, I went to school and worked as an electrical engineer, just a little background for you.

    A lot of the time there will be some sort of designation printed right on the board, this goes back to the days when boards were hand assembled. Here are some common abbreviations found:


    BT = Battery
    C = Capacitor
    CB = Circuit Breaker
    CR = Diode
    D = Diode
    F = Fuse
    FL = Filter (also a coil - copper)
    IC = Integrated circuit
    K = Relay (copper coil inside)
    L = Inductor (copper)
    Q = Transistor, Semiconductor
    QA = Transistor array (on older stuff this can look like an IC)
    R = Resistor, Potentiometer
    RA = Resistor array
    S = Switch
    T = Transformer
    TB = Terminal Block
    U = Integrated Circuit
    VR = Zener Diode
    X = Socket
    Y = Crystal Unit

    If there is no indication on the board, sometimes you can determine what the component is from the symbols on the side:

    OHM : either written as "ohm" or more likely a symbol that looks like an upside down horse shoe. This is a resistor.

    Farad: symbol (F) almost always preceded by a funny looking "u" (micro). This is a capacitor.

    Henry: (yes really), Symbol (h), this is a coil.


    This is far from a definitive list, nor is it always exact. If there is interest I'll add more with pics of the symbols. Anyway maybe someone can benefit a bit from this.

    Last edited by devo; 03-11-2012 at 02:09 PM.



  2. #2
    Mick's Avatar
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    Interest is shown.
    People may laugh at me, but that's ok. I laugh all the way to the bank.

  3. #3
    Mechanic688's Avatar
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    Just to add to what you have started this is a very good explanation of the different parts.









    Last edited by Mechanic688; 03-11-2012 at 12:42 PM.
    P & M Recycling - Specializing in E-Waste Recycling.
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    Devo,

    Very helpful. I was just looking at an odd-ball board last night.... it had the printed letters and while most were fairly obvious, a few had me stumped. You're list has given me immediate results. Thanks!

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    The colored lines on the resistors indicate the resistance value in ohms. There were 2 sayings to help remember the order if I can remember them

    Bad Beer Rots Our Young Guts But Vodka Goes Well
    or
    Bad Boys Rape Our Young Girls But Violet Gives Willingly

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  7. #6
    Mechanic688's Avatar
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    I really hope they make a sticky out of this thread so I don't have to keep posting this.






    Answers——————

    1 Diodes
    2 Piezo Buzzer
    3 Transistor
    4 Transformer
    5 Relay
    6 Inductors
    7 Integrated Circuits (IC’s)
    8 Capacitors
    9 Crystal
    10 Resistors










  8. #7
    Mechanic688's Avatar
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    Here's a resistor calculator for anyone who needs to use one.
    http://www.dannyg.com/examples/res2/resistor.htm

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  10. #8
    Mick's Avatar
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    [QUOTE=Mechanic688;62213]I really hope they make a sticky out of this thread so I don't have to keep posting this.

    No sooner said than done.

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  12. #9
    Mechanic688's Avatar
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    Thank you Mick, I owe you a cold one,,,

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    Identification Pictures for Surface Mount Devices (SMD) : Capacitors

    Resistors: In these pic's their using a 1/4 watt resistor for scale. (The one without a number).

    IC's

    1. 20 Pin DIP (Reference) 2. 20 Pin (WIDE) SO-IC 3. SO-IC 8 with heat sink tab 4. SOIC-8 5. 20 Pin SSOP

    1. SMT Power Transistor 2. SMD Led 3. Melf Diode 4. 4 Leg SOT 5 - SMB Diode 6. SOT-223

    1. 1008 Inductor (Wire Wound) 2. 1210 Ferrite Bead 3. Variable Ind 4. RF Transformer 5. Ferrite Bead


  14. #11
    devo started this thread.
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    Wow this turned out well in a hurry, nice change from the antics of the last couple days. I just checked what I had laying around that might be of interest and found quite a bit that I should take some pics of. I will this evening, time for a Sunday nap for now though.

    Ps Thanks Mechanic688 for helping with those pics, going to help a lot of people out I think.

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  16. #12
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    Closed

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