SATA /PATA external supply ?

[budm]

Re: SATA /PATA external supply ?

So what did you do to fix it?
Changed the TL431 or something else?

[bianchi77]

Re: SATA /PATA external supply ?

I had fixed it, thanks everyone ,done

[bianchi77]

Re: SATA /PATA external supply ?

[Khron]

Re: SATA /PATA external supply ?

Are all the rectifier diodes ok?

If the 5v's ok, the TL431's very likely ok as well.

Quit using "shorted" willy-nilly like that - just because it draws more current doesn't necessarily mean something / anything is short-circuited.

PS: As pointed out before, that power supply was definitelt NOT designed with a 22ohm source resistor for the switching FET...

[bianchi77]

Re: SATA /PATA external supply ?

with FET 4N60, I got 5.3V output but 12V = 2.7V....but I use 22 ohm for FET resistor...
if I put 0.22 ohm...it's shorted straight away....bright light one bulb...
I reckon, TL431 is cutting 12V voltage for some reason...could it be faulty ?

[bianchi77]

Re: SATA /PATA external supply ?

I put 0.15 ohm..and the bulb is very bright...short guys..but with 22 ohm...all good..only I2v become 2.5v...clues? 5v is OK...Don t be mad..no theory here only matter of resistor take it easy n fun..could it be coupler..since I use used one from TV board..probably abit different character..

[Marianelforum]

Re: SATA /PATA external supply ?

I do not think insults helps anyone, maybe @Kaboom should be a bit more moderate, still Bianchi sometimes you are realy testing people's patience with your atitude. You really should be more modest and pay closer attention to what other say.

Good luck

[bianchi77]

Re: SATA /PATA external supply ?

78 posts are not completely mind....

[bianchi77]

Re: SATA /PATA external supply ?

why are you so angry like that with all swear word ? hehehe...
if you're smart enough you will not swear to me...
I don't need a reward or something like that...only simple question with simple answer

[kaboom]

Re: SATA /PATA external supply ?

He he even for reading already wasting my time ..

What about the time others (myself included) have wasted on you, you ungrateful ignoramus?

Did you ever consider THAT?


Now we all had to start somewhere, but everytime someone posts in detail and gives suggestions, you're acting all "fuck you all- [b]I'm gonna do what I want anyway," with no regard to what that SMPS could do to you..

In your case, it seems you need a good whack o' 240- then you'd have your "oh shit, they knew what they were talking about" moment.

Just don't cook any customer HDDs in the process, mm'kay? Cause that's what gives those hole-in-the-wall computer "repair" shops all a bad name.


Hope that didn't waste too much of your time, you narcissistic egomaniac. In the time 78 posts took, you could've earned enough to buy a legit power supply, so really, the joke's (still) on you. You sound like someone who'd fall for the idea that metal shavings would make an engine run better; you'd be off to try this, kill the engine, and then blame everything but your own proud-ignorance for the disaster.

You really don't want to fix that power supply, do you? Just constant "comfort" and "reassurances," kind of like those "stupid kids" from back in school. When you do something wrong or screw up, others are supposed to "reward" this by saying "good job?" I don't think so- that takes away from those who do know their stuff/trade.

(off the record, this jackass sounds like "thesloc")

[bianchi77]

Re: SATA /PATA external supply ?

He he even for reading already wasting my time ..

[kaboom]

Re: SATA /PATA external supply ?

It is a lot more than that.

It's also called "jumping in before you can swim."


Even if this unit is returned to original condition, it'll still be a shock hazard and potential threat to any devices it's powering, especially if a USB adapter serves as a "jumper wire" from said faulty power supply into some computer.


Don't be foolish enough to think that just because it's "My First Solder Job" that you will somehow make this POS better than it was; that was never the intention of this device. It only exists because "people buy anything." That's stupid- without extensive redesign, those units aren't safe- tell that to the 10,000 fools that got shocked or their stuff damaged. You're hardly on the level to even so much as figure out sec side bonding to the EGC, or what that even means, as I've seen by your replies to such inquiries. Just a dumbed-down "I wanna fix it." In this case, that means being prepared to go in with complete knowledge of all fundamentals, from the power cord to the DC load; if one was to jump in this recklessly to larger stuff, they wouldn't live to tell about it. Like metal fish tapes in 480V panels, supposedly "dead" because only phase-phase checks were made, with one leg still hot from sticking upstream bkr. The result would be that fishtape goes all the way up to 277V and the resulting "surprise," plus say, no locknuts on conduit- fishtape and conduit are now live.

"B-b-but meter said dead!" No! Dumbass! You checked between legs, but not from phases to GND, which would've indicated stuck bkr.

So in that above made up(?) scenario, something the unexperienced won't think to check ends up being a game changer. It's just the same with that stupid power supply of yours. I suggest you gain some appreciation for what it could do when it goes wrong. Even if you get it to regulate or whatever your idea of "fixed" is, it's still a latent hazard.

Will it have to wait til that ext hdd is sitting at line voltage, and the computer is destroyed from backfeed for you to understand??? Or will it take a 240V shock to knock some sense into you?


Enough with the arrogant, ignorant excuses- if you don't know how to fix it, throw it out already and get a power supply, not a prettied-up turd. You've no reason not to.

Not really, not if you have good knowledge base.
For example of the OPTO, MOSFET. Understanding how they work, so when you look at the circuit it will help see how it is being used.

Do you really expect that? Read my earlier posts in the thread- even simple concepts like bonding and why it's important go right over the OP's head. One day, that thing'll leak, and the whole secondary will have line voltage on it. That "third wire" in the fake power cord isn't even connected- like hell it'll clear the fault that eventually livens up the "12V" output.

"But I'll just use a laptop on battery power to avoid sparks to the USB socket." Great job- now the entire laptop goes up to 240V!!! With the ext HDD and ext adapter (and its USB cable) serving as the "jumper" to the poor computer. Guess what else? If that laptop is floating at 240V, so are you if you're toching it!

You ask about how to test OPTO, if you know and understand how it works and how it is used then you will know how to test it.

Either OP is trolling to see what we know about the stuff, or is well and truly clueless- see posts about measuring diodes while still in ckt, the 1N400x vs UF400x "working" "because they fit" (but still confused about 500 NANOseconds vs 30 MICROseconds, that and different PIV), and "forest for the trees" moments such as hyper-focusing on substitute transformers.

Bianchi, I'll tell you straight up to put this one aside- not worth the risk at this point. Let's say you think you've fixed this, in your idea. Then it destroys someone's HDD that you're attempting to back up with backfeed. Hopefully, you'd be honest enough to tell that customer what actually happened, and not lie about using a unit "unfit for intended purpose" (DUH- it's a FAKE power supply). You've had multiple warnings/suggestions, from myself and others, about "going too far, too fast."

[Marianelforum]

Re: SATA /PATA external supply ?

I can't earn any money from it...

You keep complaining about that and use it as an excuse not to learn basic electronics, but you still want to fix stuff, that in it's self is a contradiction

Electronics can only be a hobby, one wich you play with in your spare time, but even a hobby requires some research. Electronics can also be a job in it's self, if you really like it then you pay close attention to it, to the learning process, ( wich as it has been said, never stops ), sooner or later results will come, for example for me it started as a hobby from childhood, but now it has become a small business, one that pays the bills

All the best.

[budm]

Re: SATA /PATA external supply ?

It is a lot more than that.
You have a lot to read.
http://www.smps.us/magnetics.html
https://cdn.badcaps-static.com/pdfs/...276779faf1.pdf
https://cdn.badcaps-static.com/pdfs/...992d99cd1e.pdf
https://cdn.badcaps-static.com/pdfs/...9fed2c3488.pdf





Sample of the spec of the transformer:

[bianchi77]

Re: SATA /PATA external supply ?

http://s.aliexpress.com/JJBVjM3Q ?

[bianchi77]

Re: SATA /PATA external supply ?

I wonder what s the value of that transformer? Anyone knows? How many mH? I need it if I want to do math..hehe

[bianchi77]

Re: SATA /PATA external supply ?

Ok thanks again ....need to go working....earning money....continue later mates...cheers

[budm]

Re: SATA /PATA external supply ?

Not really, not if you have good knowledge base.
For example of the OPTO, MOSFET. Understanding how they work, so when you look at the circuit it will help see how it is being used.
You ask about how to test OPTO, if you know and understand how it works and how it is used then you will know how to test it.

[bianchi77]

Re: SATA /PATA external supply ?

that's what I don't like...."new technologies are coming" ....it means everything we learn is going to be obselete very fast....and the learning curve "the climb" is very steep...
it's ok as a hobby but not ok for earning...that's what I was experienced with....headache at the last..."stressing my head too much" I don't like that..

ok....thanks anyway for the infos, books, advices..

[bianchi77]

Re: SATA /PATA external supply ?

not a problem, keep learning and have fun...