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Variable power supply LED indicator

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

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  1. Dec 13, 2012 #1
    piczim

    piczim

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    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. Dec 13, 2012 #2
    GreenGiant

    GreenGiant

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    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. Dec 13, 2012 #3
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    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. Dec 13, 2012 #4
    BobK

    BobK

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    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. Dec 14, 2012 #5
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    A load switch is not that uncommon.
     
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