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Thread: battery supply with relay

  1. #1
    Junior Member Newbie
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    Default battery supply with relay

    hi friends Im new to this forum
    and i would like help regarding how to use a battery supply in case of power failure for a circuit using a single channel relay switch.

  2. #2
    Administrator T-1000 vikas's Avatar
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    Why do you want to use a relay , simplest would be use 2 diodes that should do. There are more complicated approaches also but this should do . Relay would lead to a circuit reset and i would not recommend it.

    http://www.qsl.net/k/kb8mfv/images/B...0schematic.gif
    Vikas Patial

  3. #3
    Junior Member Newbie
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    Thank you Vikas, But i need to connect this circuit to an an encoder HT640. So how do i go about it

  4. #4
    Junior Member Newbie
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    there is nothing on this ^^
    i just want to know if any has got it then please share

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