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What are these symbols in a schematic.

Discussion in 'Datasheets, Manuals and Component Identification' started by Rehmat karim, May 20, 2017.

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  1. Rehmat karim

    Rehmat karim

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    May 20, 2017
    Hello everyone.
    I am new to electronics therefore I am not an expert. I was studying a metal detector schematic, I need help in few things in the attached schematic, Kindly tell me what are these symbols, what they mean and if someone want to build this circuit what components would be used in place. I have marked the areas red kindly help me if there is any expert out there. thanks you very much.
     

    Attached Files:

  2. davenn

    davenn Moderator

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    Sep 5, 2009
    most of them are really straight forward
    so come on make an effort and tell me what you think they might stand for
     
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  3. Rehmat karim

    Rehmat karim

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    May 20, 2017
    Can't tell what are these, B,C D F and H confuses me. If you know the answer please tell me.
     
  4. davenn

    davenn Moderator

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    Sep 5, 2009
    so what do the tags on C, D, and H say ?
    they are very clear in their wording ..... what does that tell you ?

    cant make out clearly what B and F are ... the diagram is too small and unclear
    look like some sort of link alternatives
     
  5. Rehmat karim

    Rehmat karim

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    May 20, 2017
    heathkit-gr1290-metal-detectorMARKED.jpg C D and H says they are voltage sources, but what about the Point G it also showing voltage points.
     
  6. davenn

    davenn Moderator

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    Sep 5, 2009
    exactly .... that wasn't too difficult was it :)

    all points like G and there is a lot of them with an arrow pointing up and a voltage marking tell you they are
    going to a voltage source that supplies the indicated marking

    so, can you see where G and ones with the same marking go to ?

    B is a switchable jumper that can switch the meter between two of the voltage sources
    the 9V one (H) and the 5.6V one (C)
     
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  7. Rehmat karim

    Rehmat karim

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    May 20, 2017
    Hahaha Thank you. You cleared my confusion. Point F is still need answer.
     
  8. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    F is a double pole double throw switch.
     
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  9. Rehmat karim

    Rehmat karim

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    May 20, 2017
    Thank you Steve.
     
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