FET used as switch

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Discussion in 'General Electronics Chat' started by shaun, Feb 25, 2005.

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  1. Feb 25, 2005 #1
    shaun

    Thread Starter New Member

    Feb 23, 2005
    8
    0
    Please can you tell me how you would use an FET(FDV301N) to connect a battery into and out of the circuit. Basically as a relay. The battery is negative 12 V source(Li polybatt.)
    Urgent help required.
     
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  2. Feb 25, 2005 #2
    hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    shaun,

    What is the nature of the signal that you are going to use to turn the FET on and off? (For example, 0v - off and -5v = on)
     
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  3. Feb 26, 2005 #3
    shaun

    Thread Starter New Member

    Feb 23, 2005
    8
    0
    It is a -12V dc battery.
     
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