Data Shit

[BiOzZ]

I got in to work today with a datasheet and a tube of ICs on my desk and my first thought "some more cheap chinese shit i need to test than refuse" and boy was that an understatement

first thing i noticed is it was a NCP1203 ... FAIRLY common IC to begin with ... i have a tube of them at home!

so i ignored the datasheet and wired it up from memory and fried my positive voltage jumper

so i picked up the datasheet and started reading it

i had the time of my life! it had the WORSE Engwish (chinglish) than anything i have ever seen ever ... the best part was instead of saying "Datasheet" it said "Data Shit" and unlike all the datasheets i have ever read they used that word atleast 4 times per page "in this data shit you will learn the use of this fun wire!" XD the charts were hand drawn and it looks like the PDF (or whatever the file format was) was made in open office writer

the chips were not any better ... THEY HAD NO MARKINGS! just a silver sharpie dot over pin one

AND IT HAD A DIFFERENT PINOUT!!! ... they did work in the end if wired correctly (2.2k pulldown on the gate of the fet not needed on the real one) but i would NEVER wire these up again ... or ever use these in my life

im trying to get a hold of the PDF to post it here ... its really funny

id send a letter to ON simi warning them of these knockoffs but honestly ... nah ... you have to be a special kind of retard to actually use one of these in your design

[c4757p]

... fried my positive voltage jumper

Unless I'm completely misunderstanding you, I can only imagine you powered it from a car battery....

[Joules]

I think we have a queue of Special Retards forming... 

[Harvs]

I can't even begin to fathom where you must work to make it a profitable exercise to have you spending time "testing" these sort of parts? The real thing from digikey is less than 50c ea in quantity...

[c4757p]

I can't even begin to fathom where you must work to make it a profitable exercise to have you spending time "testing" these sort of parts? The real thing from digikey is less than 50c ea in quantity...

If I had to guess, the same sort of place where he doesn't have a current-limited high voltage supply to test things like this. At least, that's the explanation I'm going with for how he fried a jumper - powered straight off rectified mains?

[Ed.Kloonk]

Mysterious thread is mysterious.

[BiOzZ]

First off this IC runs off 120v and i simply stuck it on a small 3A variac in to an 5A isolation transformer and built up the standard NCP1203 circuit... not expecting any load i used my standard thin beadbord jumper ... why not put several power supplies in series? because thats time consuming and i had other shit to do

i dont see how this was that hard to understand

and i dont know about you or where you guys work but when we get some new parts you have not used before you test them ... we have started looking at chineese suppliers and some of there parts actually work very well and are very cheap ... not everything out of china are half assed slapped together won hung low rippoffs! ... granted these were

i dont know who thought these could possibly be real on simi but that shit happens

[digsys]

I can't even begin to fathom where you must work to make it a profitable exercise to have you spending time "testing" these sort of parts?

Life isn't always about profit. I spend a LOT of my time "playing" with new / interesting / alternate components to build up a good
knowledge-base. It is also important sometimes to "blow stuff up", just to SEE a worst case failure mode in the field (I'm showing new
techs this week in fact). ANs yes, sometimes - if you know a part / circuit so well, you don't bother checking stuff. Shit happens.

[c4757p]

First off this IC runs off 120v and i simply stuck it on a small 3A variac in to an 5A isolation transformer and built up the standard NCP1203 circuit... not expecting any load i used my standard thin beadbord jumper ... why not put several power supplies in series? because thats time consuming and i had other shit to do

i dont see how this was that hard to understand

If your job involves offline converters I'd expect you to have a reasonable power supply for that purpose!

[BiOzZ]

I can't even begin to fathom where you must work to make it a profitable exercise to have you spending time "testing" these sort of parts?

Life isn't always about profit. I spend a LOT of my time "playing" with new / interesting / alternate components to build up a good
knowledge-base. It is also important sometimes to "blow stuff up", just to SEE a worst case failure mode in the field (I'm showing new
techs this week in fact). ANs yes, sometimes - if you know a part / circuit so well, you don't bother checking stuff. Shit happens.

yeah i have had countless chips and transistors pop on me in stress testing ... its to be expected ... granted not expected here where i just wanted to check if it worked
thanks for the comment and exactly!

If your job involves offline converters I'd expect you to have a reasonable power supply for that purpose!

i dont have my own ... i have only been in the industry for 8 or so months ... we have some good HV power supplies in the lab but i was only checking if they worked and whats the worse that can happen when not current limited? a blown fuse? a fried jumper? a popped chip?

yes i did fuck up several times here ... should have been monitoring the current, checking for strange smells or what have you and im not going to make up half ass excuses for why i did not

i thought this would have been a funny thing to share and get a few laughs but clearly i was wrong

sorry guys for the confusion it won't happen again

[c4757p]

Dude, we're not attacking you, we're just discussing it.

[BiOzZ]

Dude, we're not attacking you, we're just discussing it.

i know your not, you have been very kind and helpful in the past
it just turned from the original point of a hilariously cheap chinese ripoff part in to a discussion about my work place and how i operate and the last thing i want right now is criticism being brought to my employer after working there for this short period of time and in the job market of my state
sorry for overreacting

[Harvs]

Yep, and I'm not having a go at you're employer either.  I simply don't understand.  Pretty much all the stuff I've worked with professionally, most of it originating from the US, costs serious amounts of money (due to low volume, high reliability.)  So if questionable parts were to arrive in stock (i.e. looks dodgy to start with), there would be some effort expended to ensure it hadn't made its way into anything in the field by accident, then the stock quarantined and returned to the supplier for investigation of their supply chain.

Whilst I fully understand that cheap stuff is made and A-grade parts aren't used, I'm just surprised that it would be economically viable for a company employing people in the US to do that.  I thought anything that it was economical to have US based persons working on would also buy known source basic components?  Obviously I'm wrong...

[c4757p]

And... how long have you been here?? I think the longest we've ever managed to stay on topic is three replies! 

[digsys]

I wouldn't lose any sleep over it BIOzZ, Forums have a life of their own. Sometimes you get lucky and everything ends well, often you
end up in shit-fights and it all gets de-railed. It is OFTEN totally unpredictable, depends on who is on and first replies in most cases.
Moderators will usually only get involved in serious cases, which works most the time. Just build up a thicker skin and DON'T be put off.
It was funny, I haven't seen counterfeits with actual pin CHANGES before !! A new level of crap :-)

[c4757p]

It was funny, I haven't seen counterfeits with actual pin CHANGES before !! A new level of crap :-)

Yes, in the interest of "staying" on topic, I found "data shit" probably way more hilarious than it is. I'd love to see a copy of this data shit.

[ivan747]

It was funny, I haven't seen counterfeits with actual pin CHANGES before !! A new level of crap :-)

Yes, in the interest of "staying" on topic, I found "data shit" probably way more hilarious than it is. I'd love to see a copy of this data shit.

I bet it really is a data shit.

For about 2 years I used to pronounce "sheet" as "shit". Thank god I only talked to a couple of people in english and no one noticed 

[Psi]

If its not under NDA can you post a copy of the datasheet?

[Bored@Work]

Whilst I fully understand that cheap stuff is made and A-grade parts aren't used, I'm just surprised that it would be economically viable for a company employing people in the US to do that.  I thought anything that it was economical to have US based persons working on would also buy known source basic components?  Obviously I'm wrong...

Maybe it is just to keep the intern busy?

[smashedProton]

Yeah, the eevblog forum likes to derail topics.  I have had a topic derail into talking about a teardown of a sex toy before...  that was interesting

[krish2487]

Yeah, the eevblog forum likes to derail topics.  I have had a topic derail into talking about a teardown of a sex toy before...  that was interesting

That's knowledge ..... for / of pleasure

Sent from my Chaser using Tapatalk 2

[amyk]

I've seen 1300x transistors where the pinout was different from the official ones.

[vlf3]

I'm getting on in years, but from the first post...

WORSE Engwish (chinglish) than anything i have ever seen ever ... the best part was instead of saying "Datasheet" it said "Data Shit"

  Still chuckling...

[c4757p]

Yeah, the eevblog forum likes to derail topics.  I have had a topic derail into talking about a teardown of a sex toy before...  that was interesting

Hehe... I like it that way. (No, not that way, you pervert!) Save the militant on-topicism for lecture halls! You learn more fun knowledge that way.

[c4757p]

I've seen 1300x transistors where the pinout was different from the official ones.

That seems more likely to me, just because there are so many different transistor pinouts and so many similar transistors. There aren't that many ways to make an NCP1203 though...

[Jon86]

Can we have a link to the data shit? 

[kfitch42]

I googled for

filetype:pdf "data shit"

and got 308 results, guess this isn't the first (or last) time this particular engrish has show up.

And,

filetype:pdf "data shit" NCP1203

gives not results.

[AlfBaz]

I always thought data shit was a serial stream from an arduino 

[Ed.Kloonk]

I always thought data shit was a serial stream from an arduino 

Pay that.

[opablo]

...
For about 2 years I used to pronounce "sheet" as "shit". Thank god I only talked to a couple of people in english and no one noticed 

WAIT A MINUTE !.... you means "sheet" and "shit" are pronounced differently ?
Please explain this to me because I now don't know if I was making a fool out of me all my life...
(My native language is Spanish)
If it was a simple sarcasm joke also please let me know 

[c4757p]

  It's OK, we all do stuff like that.

To use Spanish letters, English "sheet" has an "i" vowel, and "shit" has a short vowel not unlike a quick Spanish "e".

[opablo]

So I was lucky !... I was pronouncing both of them with a strong spanish I sound... shIt 

Thanks for taking the time to help a southern nerd

[ivan747]

So I was lucky !... I was pronouncing both of them with a strong spanish I sound... shIt 

Thanks for taking the time to help a southern nerd

These seems to happen to a lot of people then! 

[vlf3]

To use Spanish letters, English "sheet" has an "i" vowel, and "shit" has a short vowel not unlike a quick Spanish "e".

Cognitively, that vowel is missing a B ? 

[c4757p]

To use Spanish letters, English "sheet" has an "i" vowel, and "shit" has a short vowel not unlike a quick Spanish "e".

Cognitively, that vowel is missing a B ? 

Should I feel stupid for not getting the joke?

[c4757p]

So I was lucky !... I was pronouncing both of them with a strong spanish I sound... shIt 

You were indeed - not only was "sheet" correct, but nobody who recognizes a Spanish accent will ever misunderstand your pronunciation of "shit".

[vlf3]

Don't be concerned c4757p... it's just my word asocassion relationship Shit, with Vowel & V B owel. 

[AlfBaz]

I use to work with a guy from Chile who use to pronounce volts as bolts. I'd joke with him saying that the local hardware shop was a High Boltage Area

[c4757p]

I use to work with a guy from Chile who use to pronounce volts as bolts. I'd joke with him saying that the local hardware shop was a High Boltage Area

  "B" and "V" are sometimes identical, other times very similar in Spanish. That's the path I was heading down with vlf3's joke, hence my confusion!

[opablo]

hey c4757p... why do you know so much about spanish ? where are you from ? (el foro dice que sos un gringo...)