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HELP 12V DC TO 5V DC

Discussion in 'General Electronics Discussion' started by n o v l i s, Aug 19, 2010.

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  1. n o v l i s

    n o v l i s

    3
    0
    Aug 19, 2010
    Hi to all.

    i create diagram.pls check if right daigram and right parts?

    [​IMG]
    i create diagram.
     

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    Last edited: Aug 19, 2010
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    You missed the ground connection on the 7805.

    Depending on the current you may need a heatsink on that 7805.
     
  3. n o v l i s

    n o v l i s

    3
    0
    Aug 19, 2010
    i forgot a ground. but right input an7805 12v dc to 5v dc sir?

    [​IMG]
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Yep, that looks much better
     
  5. n o v l i s

    n o v l i s

    3
    0
    Aug 19, 2010
    thanks sir.
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    At ease Private!

    (Seriously, don't call me "sir")
     
  7. shaheen

    shaheen

    28
    0
    Nov 1, 2009
    this is the circuit diagram to convert 12V into 5V.
     

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  8. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,482
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    Jan 21, 2010
    Which in some respects has less detail that the original author's diagram.

    Since you've changed it, perhaps you can explain why you have changed the values of the capacitances and why you have added the extra capacitor.

    You might also like to specify voltage ratings for the components and give us reasons for them too.

    If you're going to start posting alternative circuits, you should be ready to explain the benefits of your circuit and/or different component values. To do otherwise risks adding a degree of confusion for the original poster and anyone coming back to read this thread later.

    edit: the solution here isn't in any way definitive. For example, you may like to explain why you didn't place a reverse biased diode between the input and output of the 3 terminal regulator?
     
  9. shaheen

    shaheen

    28
    0
    Nov 1, 2009
    I am sorry if anyone confused with my circuit.

    voltage rating is the same as above. i-e 50v for 100u and 16v for 10u.
    Capacitors are added to remove the AC components.
    Actually I used this circuit(which i uploaded) and built a power supply, this is working very well. It will also works if you don't use 100n capacitor.
     
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