ADC and power consumption

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  1. - 31st March 2010, 08:23 #1
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    rsocor01
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    bogdan,

    That voltage divider alone is using 45 uAmps all the time. Also, why are you using resistors R5, R9, and R10? If you have these ports set to high then you would have more current leaking in there.

    Robert
  2. - 31st March 2010, 15:03 #2
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    bogdan
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    Was the battery voltage divider in circuit before the ADC command was added and the first measurments taken?
    No, the voltage divider circuit wasn`t there when i measured 42uA


    Leave the code as is and disconnect the divider from the battery and see if that makes a difference.
    It is going back to 42uA


    R5, R9, and R10
    = pulldown resistors for unused pins



    Thank You for your help ...
  3. - 10th April 2010, 04:25 #3
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    Default what about now ?

    In order to reduce the power consumption it is a good idea to use a common emitter transistor circuit for the voltage divider (as in the attachment) ?

    I will
    Code:
    High PortA.1
    during the ADC reading/conversion

    Best Regards,
    Bogdan
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