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Trying to find a device!

Discussion in 'General Electronics Discussion' started by youranium238, Jun 8, 2013.

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  1. youranium238

    youranium238

    1
    0
    Jun 8, 2013
    Hello,

    I'm looking for something (commercial or not) that allows me to do the following:

    I want a light (12v, small lamp) to be connected to a battery of some sort. The battery is being continuously charged via a wall outlet. The lamp at this time is off. When the power is shut off from the wall outlet, I want the battery to start discharging, and then the lamp will turn on. After the power is restored, the battery will return to charging, and the lamp will turn off. Any ideas?

    Alternatively, I've been looking at using relays to accomplish this, but every relay I used gets extremely hot, which is worrisome. Are there any more reliable continuous use relays I can find?

    Thanks!
     
  2. BobK

    BobK

    7,682
    1,686
    Jan 5, 2010
    There are plenty of these available commercially.

    Google "emergency lights"

    Bob
     
  3. garyson0

    garyson0

    7
    0
    Jun 5, 2013
    Number of Emergency lights are available as your expectation. Just buy it.
     
  4. poor mystic

    poor mystic

    1,066
    31
    Apr 8, 2011
    Call it a "mains fail relay" and you'll find something you can run continuously.
     
  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,412
    2,780
    Jan 21, 2010
    No, it's just rubbish posting and that is why I am removing many of your posts.
     
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