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  1. Closed: Re: How to know this burnt device on my laptop's motherboard ?

    I ordered the mosfets from aliexpress, I just have to wait like a month until it arrives.

    It's the ao3409.

    I also searched for a replacement motherboard and it's really expensive; $500+. But I...
  2. Closed: Re: How to know this burnt device on my laptop's motherboard ?

    Is there anyway to simulate the operation of Q7 ? just temporary until I receive the replacement mosfet from aliepxress.
  3. Closed: Re: How to know this burnt device on my laptop's motherboard ?

    OK .. found it !

    It's the Q7.

    157749
  4. Closed: How to know this burnt device on my laptop's motherboard ?

    Hello,

    I was doing some fixing to my Dell 7559 laptop frame because there were some breaks at the hinges spots and I was trying to fix it with the super glue.

    But later I noticed that when I...
  5. Closed: Re: Measuring currents in a twin pair of half controlled rectifier

    I actually didn't understand what you mean.

    We are technical college in Saudi Arabia and the equipment, training kits and documentation is for this company I posted their link which is located in...
  6. Closed: Re: Measuring currents in a twin pair of half controlled rectifier

    I agree with you, both devices would be in reverse bias by that draw !

    Except if the author is following the principle that the current flow in the opposite direction, not the conventional idea...
  7. Closed: Measuring currents in a twin pair of half controlled rectifier

    Hello,

    I'm revising this documents of a company that providing a power electronics experiments board for our electronics labs.

    I'm wondering about the measured currents in a half controlled...
  8. Closed: Re: Need information about related application to power electronics

    Could you point me some pages that contain a complete example for a certain panel or application that contains a power electronics component ?

    Or provide me with some photos from google of stuff...
  9. Closed: Need information about related application to power electronics

    Hello,

    I'm working on a course of the basics of power electronics.

    I've gone through some simple examples, but I want to learn some stuff about other bigger real life applications; like this...
  10. [SOLVED]Closed: Re: What are the names of these voltages for a 3-ph full-wave controlled rectifier?

    what you think is rusty is gold to me :)



    yep i know transformer stuff ..




    yeah this is the configuration that step the voltages from delta to star + having the neutral wire for the...
  11. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    My appliances with 3 prong are:
    1. Ariston 3 in 1 clothes washer...
  12. [SOLVED]Closed: Re: What are the names of these voltages for a 3-ph full-wave controlled rectifier?

    This is the circuit:

    156521

    This is the solution of the example:

    156522
  13. [SOLVED]Closed: What are the names of these voltages for a 3-ph full-wave controlled rectifier?

    I ran through this chapter and reached this circuit which is fine and I solved the previous controlled 1-ph circuits' examples and I understand the parameters of the different voltages, current,...
  14. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    Just to point another arising problem !

    With bootlegging the ground pin to neutral wire, problem with appliances that have g type plug that have 3 prong is solved.

    But I guess there have been a...
  15. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    ha ha :) yep I know what 220V feels like :) I touched 220V on a CRT TV motherboard couple times and the power was on.

    You are right ! I've done the bootleg after assuring that I'm connecting the...
  16. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    That's Saudi Arabia :)

    It was a dust wave went through our city couple weeks ago. But we don't have this so often, it's once in months.

    Certainly it's :grin:




    Life clean itself :) lol...
  17. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    156215

    It turned out that the neutral is grounded :)

    I bootlegged the neutral to ground and it works fine now.
  18. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    OK, so it could be the capacitance. Also thank you for your advice and reply to my post.

    But moving to another apartment won't be as effective because pretty much most the buildings are done in...
  19. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    I recorded this video this morning.


    https://www.youtube.com/watch?v=zx6Hcba7n4s
  20. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    Oh, OK; then I got your explanation about those Belkin power strips that they won't work for my problem. And thank for explaining how they work and that they contain over voltage protectors and not...
  21. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    Which indicator ? Do you mean the one in the drawing ? That drawing is did it myself to explain my idea about the problem.



    OK, so surge protectors and RCDs are different !

    But the idea I...
  22. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    How about this protection when doing a bootleg ?

    156053
  23. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    You are right ! I cancelled the order, because I went through videos on YouTube and they demonstrated that these devices really don't give the required results !
    ...
  24. Closed: Re: How to choose a good university for electronics engineering in USA?

    It's a scholarship program from my organization. I don't want to cost my country a lot. I'm thinking of a good university not too difficult .. not too easy. A good place to learn a lot about embedded...
  25. [SOLVED]Closed: Re: Mains leaking currents causing problems in my house

    I just bought a plug tester from Aliexpress, it should arrive in a month or so.
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