Identifying components: capacitor differences, etc.

Discussion in 'General Electronics Chat' started by Jan Luthe, Feb 13, 2015.

  1. Jan Luthe

    Thread Starter Member

    Jan 10, 2015
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    Please keep explanations simple. I'm a newbie. See attachment.
    A: What is it?
    B: Potentiometer: Has 2 terminals underneath. What are they for?
    C: Does this have a negative terminal because of its 'construction? Do other type of capacitors also have 'negative' terminals?
    C + D: What is the practical/useage difference?
    E: What is it?
    F: Capacitor? What capacitance?
     
  2. bertus

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    Apr 5, 2008
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  3. alfacliff

    Well-Known Member

    Dec 13, 2013
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    a, mica capacitor used in rf circuits,
    b, switch on end of potentiometer.
    c, electrolytic, yes it is polarized.
    d ceramic capacitor, not polarized, less cap than c
    e mica capacitor, high stability rf type
    f, probably mylar capacitor.
     
  4. Jan Luthe

    Thread Starter Member

    Jan 10, 2015
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    C +D: Both capacitors are 1 uF. Does the 'uF' indicate the capacity? If yes, what is the useage/practical difference? Why use one instead of the other?
     
  5. alfacliff

    Well-Known Member

    Dec 13, 2013
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    the electrolytics are mostly used for bypassing and filtering. the ceramic cap at d would work at higher frequencies, as well as having less parasitic inductance.
     
  6. bertus

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  7. Jan Luthe

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    Jan 10, 2015
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  8. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    On the page of digikey, you can also download the datasheet of the cap.
    In the datasheet you will find the following table:

    [​IMG]

    Bertus
     
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