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Zener Diode Tester

By on January 20, 2012

zener diode tester

Found this article quite interesting because the tester can be used to test zener diodes, transient voltage suppression (TVS) diodes, as well as standard and Schottky diodes. It has the test range from 2,2 to 100v!  You need to buy the article in order to build this tester. Please click on the photo to visit the website



  1. Rohmell Brills

    September 17, 2012 at 3:02 pm

    Perhaps the circuit is similar to this:

  2. marq bartlett

    December 4, 2013 at 2:24 pm

    I can not find any info on that super cool zener diode tester, you show cool pictures of parts, . . . what are the parts, and how can I build one of those. Do I have to buy a kit or something, because that would really help me. I have ran into so many of those diodes, and can't figure out what they are for one reason or another. Not only that, it super cool when you can build test equipment.

    Which reminds me, what's a leaker seeker? I hear about them, and I would like to know more.

    • Jestine Yong

      December 4, 2013 at 8:27 pm

      HI Marq,

      The info were from my bonus report when they get the power supply repair ebook at



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