Testing semiconductor diode properties with a simple divider?

Discussion in 'General Electronics Chat' started by ElectricMagician, Sep 29, 2014.

  1. ElectricMagician

    Thread Starter Member

    Jul 26, 2012
    57
    0
    Hello everybody,

    I want to test the properties of some diodes but I'm away from home.

    All I have at my disposal is a 19V laptop charger.

    Can I use it with a properly-rated pot to test the I vs. V properties of the various diodes?

    Also, the diodes being based on a SiC crystal, do I have to worry about UV exposure?
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,421
    3,357
    A 19V laptop charger is not much help unless it puts out AC voltage.

    You can make a simple curve tracer but you will need a low voltage AC source, a resistor and an oscilloscope that can display X-Y.
     
    Last edited: Sep 29, 2014
    ElectricMagician likes this.
  3. #12

    Expert

    Nov 30, 2010
    16,257
    6,757
    Try faking the AC by just reversing the diode and measuring again.
     
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