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Building Your Own Op-Amp Tester

By on November 11, 2010

Op amp tester

If you would like to test Op-amp IC then please click on the photo to visit the website and make your own a Op Amp Tester. This website was recommended by Saeed.



  1. Jimmy Lane

    November 11, 2010 at 4:08 pm

    Mabey I am missing something here but I only see 1 led. Also why is the output grounded on the first half of the op amp?
    Jimmy Lane

  2. Kenrick Norville

    November 11, 2010 at 11:10 pm

    I have a Sharp 19" tv repairing, everything checks out ok, there was dry joint from the power transistor, to the flyback transformer, that was taken care of, tv work fine,one day later, its powering for about 4 sec and powers off, what could be the symptom in this case.

  3. admin

    November 13, 2010 at 9:16 am

    Hi Kenrick,

    It can be cause by the power side or the high voltage side. I suggest that you visit the link below and isolate the problem to see which section is giving problem:


  4. admin

    November 13, 2010 at 11:09 am

    HI Jimmy,

    According to the website, it only show a single channel schematic and did not have the dual channel schematic that is using 2 LEDs. I suggest that you click on the links below which is more complete:

    This guy also has a video:


  5. Jimmy Lane

    November 13, 2010 at 5:04 pm

    Hey Jestine, I really felt a little dumb the other day when I asked the questions on the op-amp. I figured my own answers out later. I went to the main webpage and saw all the other versions. I really enjoy all your daily tips and now look forward to Johns and Humphreys. I am getting a shop set up at my new house and will start repairing TV's and computers later. I will let you all know tips as I get things going here.

  6. admin

    November 13, 2010 at 8:44 pm

    HI Jimmy,

    When we ask question we will learn- there is no dumb question. Congratulation for setting up your own shop but one has to be hard working, never give up and creative in order to see success. Yes you are encourage to share the repair tips.


  7. Benedictus

    February 10, 2012 at 6:11 am

    wow.. i have been looking for this.. thankz Jestine. got your mails. thankz too... do you have anything on 'FUELLESS GENERATOR'?

  8. admin

    February 10, 2012 at 9:17 pm

    HI Benedictus,

    Sorry i do not have the circuit.



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