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Zener Diode Checker

By on May 4, 2009

Remember few month ago there was a photo of me posting with a guy from Iran in a Hotel? For your information i went to the hotel to deliver a Blue Ring Tester for him. Recently he emailed me about his success in  building the zener diode checker and have fully tested the checker and i was glad that he allows me to share the photo with my blog readers. Below is the photo of his zener diode checker. If you would like to have this zener diode checker circuit please sign up at to get one and read other repair articles as well.

 zener diode checker



  1. Waleed

    May 5, 2009 at 5:08 am

    I forgot to tell you that I also built a zenner tester taken from the schematics that I took from your article. it was good and very useful. I thank you for sharing the schematics and the article with us.

  2. john preher

    May 5, 2009 at 9:45 am

    that is a nice looking unit, this would be a fun project and a useful tool to have around the shop as well.

  3. admin

    May 5, 2009 at 7:53 pm

    Hi Waleed,

    You are welcome!


  4. admin

    May 5, 2009 at 7:54 pm

    HI John,

    Yes it would be an advantage for any electronic repairer that have this zener diode checker.


  5. basabana etienne

    May 6, 2009 at 5:06 pm

    bonjour j'aime bien l'électronique mais je n'ai pas de moyen pour acheter les materiel
    merçi portez-vous bien!

  6. admin

    May 6, 2009 at 9:23 pm


    Ce matériel n'est pas à vendre. Elle doit être construite, une sorte de projets électroniques.



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