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interfacing circuit for college project

Discussion in 'Electronic Design' started by [email protected], Mar 31, 2008.

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  1. Guest

    Hi all
    I am Vikram varshney, student of Delhi College of Engineering. I am
    working on a project for making a hardwired drive to convert 240V,6A
    AC to 5V,5mA DC . I am not able to find a proper circuit for the same.
    Please suggest me any solution of alternative.

    Thanks in advance

    Vikram Varshney
     
  2. Phil Allison

    Phil Allison Guest

    <
    ** We get this same, idiot question about ten times a year.

    Proper = what exactly ??

    With safety isolation from lethal mains voltages ??

    If you have no idea what is being asked - then stay the **** away from
    mains powered projects.


    ** Buy a small 5 volt, SMPS plug pack from China - the kind that look
    like a mains plug.

    Take out the PCB and use it in your project.



    ...... Phil
     
  3. This must be the new wave of googling electronic engineers. He said he
    could not "find" a circuit to meet his specification (which is suspect
    anyway), and apparently has no idea how to actually design one. I was
    designing circuits years before I even went to college. This guy probably
    has no real interest in electronics other than it seems to be a lucrative
    occupation.

    Paul
     
  4. Guest

    Transformer, bridge rectifier, filter cap, 3-pin regulator, output
    cap, maybe bleed resistor. I can get that answer from a homeless
    person.....well homeless in Sunnyvale.
     
  5. Phil Allison

    Phil Allison Guest


    ** From the 5 mA requirement and the term " hardwired " I get the idea he
    wants a no transformer solution to a DC supply from the mains.

    From his name and bad grammar I get the idea he is a clueless uP
    programmer.

    So I stand by my post.



    ....... Phil
     
  6. Guest

    Oh, I don't know.i figured he needed to supply 5ma. Besides, who would
    go through the work of an off-line switcher for a 5mA load.
     
  7. Jim Thompson

    Jim Thompson Guest

    Yep. Just use a capacitive dropper.

    ...Jim Thompson
     
  8. Guest

    Isolation is a good idea. Granted, a transformer solution isn't going
    to cost pennies.
     
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