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problem in 12v - 230v inverter

Discussion in 'General Electronics Discussion' started by devmania, Sep 27, 2014.

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  1. devmania

    devmania

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    Sep 27, 2014
    hello,
    i have made an inverter using cd4047 as per the circuit diagram i have uploaded here.. as per the circuit diagram gate pulse are given to the mosfet from pin 10 and pin 11 of the IC . but when i apply 12v to the ic i am getting 12v at pin 10 but not getting any voltage at pin 11 but i am getting 12v from pin 13 so i have connected 100ohm resistor to pin13 . but still i am not getting output from the transformer. i am using a 12-0-12v to 230v center tapped 1.5amp transformer. please tell me where is the fault in my circuit?
     

    Attached Files:

  2. Gryd3

    Gryd3

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    Jun 25, 2014
    I'm not aware of any forum etiquette that does not frown on duplicate posts.
    You have posted this exact post 3 times intentionally in different sections of the forum. If you are not sure where to put it, please leave it in one spot and openly ask it to be moved if it's in the wrong spot.

    Pin 13 is not on the diagram you posted. Assuming that diagram is correct, have you double-checked your connections?
    Can you provide any pictures of your circuit? (Please include part numbers)
     
    KrisBlueNZ likes this.
  3. devmania

    devmania

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    Sep 27, 2014
    in this diagram pin13 is unused pin which i have checked it is having 12v supply and pin11 is not having 12v supply so i just interchanged the pin connection from pin11 to pin13 to trigger the mosfet.
     
  4. Gryd3

    Gryd3

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    Jun 25, 2014
    Pins 10 and 11 will vary and alternate to generate your output... using pin13 just because it has 12V on it is not a good reason to change the circuit.
    If pins 10 and 11 are not changing, then something is wrong with the circuit. Double-check your connections and post a clear picture with the component numbers for us to take a look.
     
  5. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    Gryd3, thank you for flagging those duplicate threads with a link to the most appropriate copy (this one).

    devmania, a few seconds' thought should have been enough to tell you that posting the same question to multiple threads would only lead to multiple mixed-up replies and an enormous waste of time for the volunteers who are trying to help you. In general, you should try to spend those few seconds.
     
  6. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Check your connections. The circuit looks ok.
    Adam
     
  7. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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  8. devmania

    devmania

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    Sep 27, 2014
    ok i will check it once again and i will connect the component according to the circuit diagram. lets hope my circuit will work and i will upload photo of it also
     
  9. devmania

    devmania

    6
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    Sep 27, 2014
    i have checked it once again.. but still the problem persists
     

    Attached Files:

  10. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    Those photos are out-of-focus and not close enough for us to check.
     
  11. devmania

    devmania

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    Sep 27, 2014
    may be this photos will give clear idea about the construction
     

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  12. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    No they don't. Have a look at those photos and see if you can tell which pins of the IC are connected to what. I can't. The second one also has a reflection from a flash which obscures a lot of the board.

    Read those two resources, try again, and check your pictures before you upload them.

    You may need to borrow a better quality camera.
     
  13. devmania

    devmania

    6
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    Sep 27, 2014
    hello sir,
    please download the photo and zoom it. i have mentioned every thing on the photo..
     

    Attached Files:

  14. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    Nov 28, 2011
    It's still too small to see clearly.

    Try taking a close-up of the used part of the circuit board.

    Also while you're at it, join those heatsinks together with some nylon nuts and bolts. They're just an accident waiting to happen.
     
  15. Gryd3

    Gryd3

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    Jun 25, 2014
    We need the picture so that we can see if there are dry joints, shorts, etc. in addition to proper wiring.
    If the pictures are not clear enough to determine this, they are more or less useless.

    Read the resources linked above regarding taking photos. (thanks Kris for correcting mine)
    Turn your flash OFF and take the pictures in decent lighting so there is no glare. Head-on, to minimize the obstruction caused by other parts on the board, and to provide a nice square image.
    If you are getting blurry photos, keep still, or change the mode of your camera to Macro. If this fails, you may need to take the picture slightly further back. It does help to crop the image afterwards, as the forum only allows images to a certain size, and cropping it will increase the size of the actual board we want to see while cutting the garbage from the edges we don't need.

    After you upload your photo, open it in the forums to see if it is still clear enough! Looking at the original wont cut it, as the picture is probably at least a 5-6MP image, where it is just reaching 1MP here on the forums.
     
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