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Variable power supply LED indicator

Discussion in 'Power Electronics' started by piczim, Dec 13, 2012.

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  1. piczim

    piczim

    23
    0
    Dec 13, 2012
    Variable power supply LED indicator

    I have put together a variable power supply between 1 and 30Volts, Included on the output is an on off switch, I want to incorporate an LED to show when it is on, how do I go about this.
     
  2. GreenGiant

    GreenGiant

    842
    6
    Feb 9, 2012
    is there only an on/off switch on the output?

    We would need schematics or pictures at the very least to tell you for sure
     
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,807
    Jan 21, 2010
    The simple answer is a LED and an appropriate resistor running from the unregulated DC. But that makes assumptions that GreenGiant (perhaps justifiably) did not want to make.
     
  4. BobK

    BobK

    7,682
    1,686
    Jan 5, 2010
    A double pole switch comes to mind. Run the LED off the input to the regulator. But why would you only switch the output anyway?

    Bob
     
  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,807
    Jan 21, 2010
    A load switch is not that uncommon.
     
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