Electronic symbols, Electronic circuit symbols

Discussion in 'General Electronics Chat' started by PaulEngineer, Jan 19, 2017.

  1. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
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    Hey guys! I want to know what symbol is that! I first time see this symbol! Can you explain me where it is used or what pins it have?
     
  2. #12

    Expert

    Nov 30, 2010
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    That's a transformer with one winding center-tapped. Most of the time, it's a power transformer used to make low voltage DC.
     
  3. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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  4. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
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    :confused::confused::confused: How the transformer can convert something to DC? It only export AC!! One winding center taped, low DC.... I'm confused so much that I cannot recognize anything!! I thought that a transformer have 2 pins primary coil and 2 pins for secondary coil! From when the transformer have 2 or 4 or 5 or 6 or.......... Unlimited pins! I cannot understand this transformers! Can you explain better if you can, about this transformer? Thanks!!
     
  5. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
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    And the horizontal bars designate an iron core
     
  6. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
    159
    7
    I want to make an inverter circuit based on this schematic




    And I have not idea why this transformer? Why not this with 4 pins? Actually can I make it with transformer with 4 pins?
     
  7. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
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    You will either need a center tapped transformer (5 pins) or TWO four-pin transformers.
     
  8. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
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    I have a massive transformer that have 4 pins in one side and 4 pins in other side! The circuit board is RJBX0226AB. With this transformer I will success anything?
     
  9. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
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    I have one with 8 pins
     
  10. SLK001

    Senior Member

    Nov 29, 2011
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    I'm sorry, but someone with zero knowledge of power electronics should NOT be contemplating playing with anything like this. Lethal voltages can exist in the circuitry and you have a greater than normal chance of killing yourself.
     
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  11. #12

    Expert

    Nov 30, 2010
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    How the airplane take me home? It only go to airport!!
    A transformer creates lower voltage AC and diodes convert that to DC, just as an airplane takes me to my city and a car takes me home. The transformer and the airplane only go part way. Another thing finishes the job.
     
  12. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Before building a circuit such as a inverter, why not study up on the individual components first and have an understanding of them individually before jumping in the deep end!?;)
    Max.
     
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  13. wayneh

    Expert

    Sep 9, 2010
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    Good advice. That circuit is a lot like the "Blinky" oscillator used for kits to flash LEDs. I suggest doing exactly that, making an LED blinker based on your schematic, before using it to drive a transformer and make a higher voltage.
    Inverter.png
     
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  14. hp1729

    Well-Known Member

    Nov 23, 2015
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    The attached drawing shows various configurations you might find for a transformer. One primary, many different secondaries.
    Re: DC
    True raw DC doesn't go through transformers but the transformer is still used. As the hand drafted drawing shows the DC has to be converted to AC, goes through the transformer, then is converted back to DC.
     
  15. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
    159
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    Don't worry I have made an education and some experiments and I know how they all work! The circuit with 2 NPN transistors BJT, is working as oscillator! The 2 MOSFETS IRF630 is used as a switches with efficiently high frequencies made by the oscillator, that produce 49-55Hz (if I said something wrong, that means I need a bit more education)! I have now to find a right transformer for this circuit. I was thinking if I can make one myself, but I don't know what about this center taped pin or as it calling!
    How to make this center tapped coil? how it works? How many turns it have (not accurate number please, but range number could help)? How its made? Any advice (tip) is welcome! I need a transformer which will generate 12V/7A maximum, to 110V-230VAC! What transformer I need? A power one? How to understand how many coils I need to create (if I will make one myself) for primary and secondary coils so as to success this ratio 12V/7A-110VAC or 230VAC?

    Yes I need a rectification provision to do that

    I already made that oscillator, and continuously change capacitor values to see what will happen! I understood that: as lower is the capacitance value of a capacitor so high is the frequency of the output. As higher is a capacitance value of a capacitor so lower is a frequencies in output, but if you will put 2 capacitors which one of them have lower capacitance value and the other one have high value then I will make an almost square wave frequencies that will be at the same time lower and higher! E.g. I will show you a waveform of the outputs with Morse code help.

    Lower capacitance value: 47uf-1uf and lower
    Morse code waveform:
    47uf: ". . . . . . . . . . . . . . ."
    10uf: ". . . . . . . . . . . . . . . . . . . . ."
    1uf: "........................................"
    <1uf: "much faster"

    Higher values
    100uf, 220uf, 330uf, 470uf, 6800uf +++:
    Morse code waveforms:
    100uf: "_ _ _ _ _ _ _ _ _ _ _ _ _"
    220uf: "_ _ _ _ _ _ _ _ _ _"
    330uf: "_ _ _ _ _ _ _ _ _"
    470uf "_ _ _ _ _ _ _ _"
    1000uf "_ _ _ _ _ _"
    2000uf: "_ _ _ _ _ _"
    6800uf: "_ _ _ _ _"
    >6800uf: "much longer"

    Wave form between higher and lower capacitance value:
    Morse code waveform
    Eg 330uf and 10uf: "-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-."
     
    Last edited by a moderator: Jan 21, 2017
  16. bertus

    Administrator

    Apr 5, 2008
    19,793
    4,105
    Hello,

    The usual power transformers are designed for 50 Hz (europe) or 60 Hz (USA).
    In the schematic you gave there is about 55 Hz given.
    For some theory on transformers have a look at the attcached PDF.

    Bertus
     
  17. MaxHeadRoom

    Expert

    Jul 18, 2013
    18,632
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    A CT secondary winding is generally wound Bi-filar, these means that two secondary conductors are wound together in order that both sides of the C/T. are as equal as possible.
    The turns are based on the required voltage and the turns per volt of the particular transformer and can vary from ~2 to 5 turns/v.
    Max.
     
  18. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
    159
    7
    That means that I turn 1 only insulating cable in primary winding 100 or more turns, and 2 cables in secondary winding which one of them is the secondary winding and the other one, (that I think so that one end of it should be connected with one end of the secondary winding) is the CT? I right understood?
     
  19. MaxHeadRoom

    Expert

    Jul 18, 2013
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    I am referring to the CT secondary only, this is commonly wound on top of the primary winding, in bifilar and for the CT the end of one winding is connected to the start of the other, the other 2 ends are the outer connections WRT the CT.
    Max.
     
  20. PaulEngineer

    Thread Starter Member

    Dec 21, 2016
    159
    7
    Aaa OK I will try to translate it to the Greek language so as to understand much better! So thank you very much Max ;)

    Can I ask something? What is the number "42" in the transformers calculation? It is the common number for all the kind of transformers? Or it is not?

    I'm don't worry about that I have special gloves for that!

    Can I ask one more question? The center tapped winding can be exist in primary coil too? Or it is only for secondary?
     
    Last edited by a moderator: Jan 21, 2017
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