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MOSFET switching issue

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by earckens, Dec 30, 2017.

  1. earckens

    earckens Member

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    As far as I understand your english I can ascertain that my 1N60 has three (3) legs, hence not a diode. Rest assured: we are dealing here with a 3-legged MOSFET, datasheet included in a previous post.
     
  2. be80be

    be80be Well-Known Member

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    There are 3 leg diodes packages in the 1N60 look like a plain to92

    Then there are MOSFET called 1N60 its in a To220 package but it will not work for what your wanting to do

    Maybe it you hand picked one out of 100 It looks to need a high gate voltage to turn on
    The data sheet shows it tested at 10 volts to the gate. It's +- 30 gate voltage
    You need a logic level one.
     
  3. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Unisonic is a Taiwanese company. Are their Mosfets any good or are they like other Chinese trash?
    Why not buy from International Rectifier or a European company instead?
     
  4. dave

    Dave New Member

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  5. dknguyen

    dknguyen Well-Known Member

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    Don't they all have their wafer foundries in Taiwan, China, or Korea anyways?
     
  6. earckens

    earckens Member

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    Solved.
    This last sentence got me checking my program: I had forgotten to declare the Arduino pin driving the MOSFET as an output, result was that instead of an active output only a pull-up resistor was defined on that pin. Just one line of code
    pinMode(wakeStatus, OUTPUT);
    The MOSFET was tested and is ok, actually amazing after all the abuse with soldering irons, heat, etc.. Sturdy component that 1N60.

    Edit: and I will remove the parallel connections between digital I/O's, bad idea.
     
  7. earckens

    earckens Member

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    Yes sure, all that may happen is that their Quality Assurance dpt. finds a batch with a 0.00001% deviation from the QA specs is sold as 2nd degree quality. I buy truckloads of chinese components, almost never had issues and the few times I did have an issue I got my money back. Real traders and clever people these Chinese, no wonder they are conquering the world.
     
  8. audioguru

    audioguru Well-Known Member Most Helpful Member

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    I was talking about the owner and management of the company. Western owners and management care about the quality of their Oriental-made products so they have rigorous quality control. The workers they hire also must care about the work they do.
    LG Electronics, Samsung Electronics, Hyundai, Kia and more started out miserably but are excellent today.
    In 1980 I worked with office telephone systems made by Goldstar (called LG Electronics today). Horrible soldering and reliability but very low cost.
     
  9. earckens

    earckens Member

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    Hi audioguru, just a sidenote: I think you must have seen that the circuit in question in this thread is based on an idea by you: real great job you did on that. I use it in a sensor with long stainless steel probes; I measure once an hour during 2 seconds In a simulation over 5 year's use there is not any oxidation visible.
     
  10. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Thanks, it must be the Plants Watering Watcher circuit that I fixed 13 years ago.
     
  11. dr pepper

    dr pepper Well-Known Member Most Helpful Member

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    "however if the micro only pulls up and goes high imp when off thats why your load doesnt switch off."
    I was on the right lines.
    I've made the same mistake many times.
     
  12. earckens

    earckens Member

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    Good ideas have no age.
     
  13. earckens

    earckens Member

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    I think this mistake will not be made again . Thks for your input.
     
  14. Pommie

    Pommie Well-Known Member Most Helpful Member

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    The above question was in post two. Had you answered it you would have found your error last year.

    Mike.
     
  15. earckens

    earckens Member

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    You are right, sorry I had not understood well your suggestion.
     

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