Electronic Symbols

Discussion in 'General Electronics Chat' started by PaulEngineer, Dec 23, 2016.

  1. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
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    Hello guys I wanna to know what is that symbol! Can help anyone? What is that and why it is used? Thanks

    sketch-1482515453502.png
     
    Last edited by a moderator: Dec 24, 2016
  2. dl324

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    Mar 30, 2015
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    Without some context, it could be many things. My guess is a SPDT switch.
     
  3. GopherT

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    Nov 23, 2012
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    Im guessing it is a switch - Transmit / Receive (T / R)
     
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  4. MaxHeadRoom

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    It doesn't seem to appear on any standard symbol sheet, may be a one-off?
    As requested, any context?

    [​IMG]
    Max.
     
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  5. PaulEngineer

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    Dec 21, 2016
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    This symbols in this photo maybe will help! And what is that neg?
     
  6. dl324

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    4PDT switch. It's drawn like it has center off, but that wouldn't make sense.
     
  7. GopherT

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    The T/R is transmit and receive.

    The switches are all activated by the same push button (typically the "key" on the microphone). So it is double pole (T and R) and quadruple pole (see four different segments switched).

    The NEG means negative of the electret microphone. The negative lead is connected to the metal case and you can flip it over to easily see a little trace of copper connecting that leg to the case.
     
  8. bertus

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  9. eetech00

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    Might be Tip(T) and Ring(R) as in an audio jack....
     
  10. PaulEngineer

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    Dec 21, 2016
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    Thanks to all guys for your tips I hope so I will find a way how to thank you :)
     
  11. RichardO

    Late Member

    May 4, 2013
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    The circuit looks like an intercom to me. That says that it is a switch selecting either talk (T) or listen (R). I also think it has a center off position neither transmitting or receiving when not activated.
     
  12. dannyf

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    Sep 13, 2015
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    tap opener, in a bar.
     
  13. Bernard

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    Aug 7, 2008
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    I think that all symbols & abbreviations that are not in common usage should be defined the first time they are used in a presentation. AC, DC OK, PWM, depends on audience, PPM, PAM, define.
     
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  14. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
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    That circuit is from walkie talkie (transmitter circuit I guess) 27MHz
     
  15. GopherT

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    Transmits and receive circuit.
     
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  16. PaulEngineer

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    Dec 21, 2016
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    Wow and transmitter and receiver? Wow how it can be possible?
     
  17. MaxHeadRoom

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    So basically a S.P.D.T. with centre off?
    Max.
     
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  18. hp1729

    Well-Known Member

    Nov 23, 2015
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    Jack_plug.png

    1 - barrel
    2 - ring
    3 - tip

    Old phone plug, Ring and Tip. the third is Barrel (ground).
     
    Last edited: Dec 24, 2016
  19. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
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    Uuuum I mean the circuit symbols that I marked! This circuit is from walkie talkie 27MHz. This is a jack cable and I think it have not any sense to this theme! But I will keep your tip in my mind cause I'm student :) (but I know the basics on electronic subject)
     
    Last edited: Dec 24, 2016
  20. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
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    Oooooh I confused from all this tips XD! I can not recognize the symbol, although I know almost all the symbols from outside and shuffle. What symbol is that? It is SPDT, it is 4pdt, it is some kind of this switches? I don't know! I confused XD! Some accurate answers? Maybe?

    P.S. sorry for so much questions, I put you in a very difficult position. Honestly I would not like that, I just wanted to know what the hell is that symbol! That all! Please forgive me!

    Your Faithfully
    PaulEngineer
     
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