Diode forward voltage

Discussion in 'General Electronics Chat' started by usmanqadir91, Sep 17, 2015.

  1. usmanqadir91

    Thread Starter New Member

    Sep 17, 2015
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    Dear
    I am looking forward for diodes that start conduction on specific voltage linke 2.3 V, 2.7 V, 5 V etc. If any one can help me please let me know.
     
  2. Robin Mitchell

    Well-Known Member

    Oct 25, 2009
    732
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    Zener diode in reverse bias. You could create a configuration where the diode circuit will not conduct in one direction but only conduct in the other direction. And when it conducts it would be in reverse biased mode at the voltage level you choose.

    I can see two diodes, maybe a shottky in series (to prevent reverse conduction), connected to a zener diode in series in reverse.
     
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  3. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
    2,503
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    hi,
    Regular silicon diodes are ~0.7V at conduction, germanium ~ 0.3V
    Have you considered using Zener diodes.?
    What is the application.?
    E
     
  4. usmanqadir91

    Thread Starter New Member

    Sep 17, 2015
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    I have to connected diode in front of capacitor so that when capacitor charges to a specific voltage, it starts conduction.
     
  5. usmanqadir91

    Thread Starter New Member

    Sep 17, 2015
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    0
    Can you please let me know any zener diodes having reverse biased voltage of 2.4 V and greater.
     
  6. shteii01

    AAC Fanatic!

    Feb 19, 2010
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  7. usmanqadir91

    Thread Starter New Member

    Sep 17, 2015
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  8. dannyf

    Well-Known Member

    Sep 13, 2015
    1,782
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    Different colored LEDs have different forward voltage.

    To get an arbitrary voltage, you can use a comparator to control a switch.
     
  9. daviddeakin

    Active Member

    Aug 6, 2009
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    27
    [​IMG]
     
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