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Prepaid Energy Meter (AT89S52)

Discussion in 'Doubts in My Projects' started by Binu, Jun 2, 2007.

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Page 3 of 58
  1. Binu

    Binu Administrator

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    Binu, Sep 11, 2007
    #21
  3. jagguwyd

    jagguwyd New Member

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    hello sir i want to this prepaid energy meter project..
    sir in the circuit diagram u have connected card reader's 3rd and 4th pins to 11th and 12th pins of microcontroller.. but in PCB the 11th pin has no connection..
    and for 15th and 17th pins tou have given connections for resistors but these connections are not present in the circuit diagram and for ULN also the connections are not matched with circuit diagram please check it and give reply to me!!
    hopefully iam waiting for your reply sir.

    thank you sir!!

    jaggu
    jagguwyd, Sep 13, 2007
    #22
  4. Binu

    Binu Administrator

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    Binu, Sep 14, 2007
    #23
  5. jagguwyd

    jagguwyd New Member

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    sir yesterday i have sent my doubts.please clarify those doubts.
    hopefully iam waiting for your reply!!
    thank you sir!!

    jaggu
    jagguwyd, Sep 14, 2007
    #24
  6. Binu

    Binu Administrator

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    Binu, Sep 14, 2007
    #25
  7. jagguwyd

    jagguwyd New Member

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    hai sir!! iam having one problem in all my projects if i used stepper motor and lcd in one project..
    my problem is ,the lcd becomes dim(very less intensity),after the stepper motor rotates once.
    iam using 500mA,transistor and 5v stepper..
    please help me out!!!

    jaggu
    jagguwyd, Sep 27, 2007
    #26
  8. Binu

    Binu Administrator

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    Please post your general doubts on other topic, not here and dont post the questions on more than one thread.

    Check the voltage to the LCD when the stepper motor rotates. Sure it will go lower than 4v. Since the stepper motor takes more current. use 12v to the stepper motor. if you wannt to use 5v then use seperate 5v regulator for the stepper motor.

    J.Binu
    Click here to get free blog
    Binu, Sep 27, 2007
    #27
  9. jagguwyd

    jagguwyd New Member

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    hi sir,

    which type of energy meter u r using.??
    is it available in the market.?? how much will be the cost.?/
    or shall i use ADE7757 Energy Meter IC for this..?

    jaggu
    jagguwyd, Oct 1, 2007
    #28
  10. Binu

    Binu Administrator

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    Use any type of Electronic energy meter. It costs around Rs.300. Or you can use ADE7757 based energy meter.
    [​IMG]

    J.Binu
    Click here to get free blog
    Binu, Oct 1, 2007
    #29
  11. jagguwyd

    jagguwyd New Member

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    hello sir i started this project.sir i never used the instruction "DS",How does it work sir??
    and wht is the meaning of $+3..
    please help me!!

    jaggu
    jagguwyd, Oct 1, 2007
    #30
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