summer project

Discussion in 'General Electronics Chat' started by himanshusarmah, May 22, 2009.

  1. himanshusarmah

    Thread Starter New Member

    May 22, 2009
    1
    0
    hi,i'm a second year engineering student in electronics and i need a circuit such that it provides power to the device to which it is connected after a time delay when the power goes off i.e. it should work when there is no power supply,and such a circuit can be used in refrigerator,i've tried many of my ideas but none of them is working properly,plz someone help...:confused:....its really an urgent!!
     
  2. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,576
    231
    First what have you tried?
    Second, what are you voltage, current, and frequency requirements?

    ken
     
  3. PRS

    Well-Known Member

    Aug 24, 2008
    989
    35
    Are you speeking of an emergency backup supply that automatically comes on when the main supply goes dead? And this is in a cold place? Why the time delay? How much delay do you require?
     
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