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You are here: Home / Topics / 7805 Voltage Regulator

7805 Voltage Regulator

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Electronics › Electronics › 7805 Voltage Regulator

  • This topic has 4 replies, 4 voices, and was last updated 11 years, 10 months ago by Osama Mohammed.
Viewing 5 posts - 1 through 5 (of 5 total)
  • Author
    Posts
  • June 3, 2014 at 2:15 pm #3103
    Osama Mohammed
    Participant

    I want to use 7805 voltage regulator to supply my circuit with 5v but thr output of 7805 is 4.65v not 5v is this normal?,what’s the reason and how to solve this?

    June 5, 2014 at 7:36 am #11799
    Ashutosh Bhatt
    Participant

    just check ur circuit works or not?

    is it like ur circuit needs exact 5 V not even 0.3 V less.

    how ever the reason behind this is ur circuit is sinking more current then 7805 can source.

    this is normal and usual.

    June 11, 2014 at 8:16 am #11813
    SHAH DISHANT H.
    Participant

    Hi,

     

    0.3 to 0.5 voltage drop is usual. This is becuse of two possible reasons.

     

    1. Insufficient power input

    2. More power sinking from 7805

     

    In first case, measure the input voltage accross 7805 if it is enough or not.

     

    For 2nd case, use metallic case 7805 which is having higher current capacity.

    June 11, 2014 at 1:10 pm #11814
    Sudheer
    Participant

    Hi!

     

    As Dishanth and Bhatt mentioned here, this problem may be due to insufficient power supply or more power sinking from 7805.

     

    You may get some more detailed idea about 7805 voltage regulator by reading the post – How 7805 Voltage Regulator Circuit Works?

     

     

    Once check this! I think you can get more idea about it.

     

    June 12, 2014 at 11:17 pm #11822
    Osama Mohammed
    Participant

    Thank you all, 

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