Data Shit - Page 1
Forum section: electronics / general

author: BiOzZ
author_rank: Regular Contributor
timestamp: April 30, 2013, 11:59:51 pm
content: 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 understatementfirst 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 jumperso i picked up the datasheet and started reading iti 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 writerthe chips were not any better ... THEY HAD NO MARKINGS! just a silver sharpie dot over pin oneAND 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 lifeim trying to get a hold of the PDF to post it here ... its really funnyid 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

author: c4757p
author_rank: Super Contributor
timestamp: May 01, 2013, 12:07:22 am
content: Quote from: BiOzZ on April 30, 2013, 11:59:51 pmUnless I'm completely misunderstanding you, I can only imagine you powered it from a car battery....

author: Joules
author_rank: Contributor
timestamp: May 01, 2013, 12:13:46 am
content: I think we have a queue of Special Retards forming...

author: Harvs
author_rank: Super Contributor
timestamp: May 01, 2013, 12:15:19 am
content: 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...

author: c4757p
author_rank: Super Contributor
timestamp: May 01, 2013, 12:19:28 am
content: Quote from: Harvs on May 01, 2013, 12:15:19 amIf 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?

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 01, 2013, 12:21:55 am
content: Mysterious thread is mysterious.

author: BiOzZ
author_rank: Regular Contributor
timestamp: May 01, 2013, 12:36:15 am
content: 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 doi dont see how this was that hard to understandand 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 werei dont know who thought these could possibly be real on simi but that shit happens

author: digsys
author_rank: Unknown
timestamp: May 01, 2013, 12:42:32 am
content: Quote from: HarvsLife isn't always about profit. I spend a LOT of my time "playing" with new / interesting / alternate components to build up a goodknowledge-base. It is also important sometimes to "blow stuff up", just to SEE a worst case failure mode in the field (I'm showing newtechs this week in fact). ANs yes, sometimes - if you know a part / circuit so well, you don't bother checking stuff. Shit happens.

author: c4757p
author_rank: Super Contributor
timestamp: May 01, 2013, 12:43:58 am
content: Quote from: BiOzZ on May 01, 2013, 12:36:15 amIf your job involves offline converters I'd expect you to have a reasonable power supply for that purpose!

author: BiOzZ
author_rank: Regular Contributor
timestamp: May 01, 2013, 12:54:22 am
content: Quote from: digsys on May 01, 2013, 12:42:32 amyeah 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 workedthanks for the comment and exactly!Quote from: c4757p on May 01, 2013, 12:43:58 ami 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 noti thought this would have been a funny thing to share and get a few laughs but clearly i was wrongsorry guys for the confusion it won't happen again

author: c4757p
author_rank: Super Contributor
timestamp: May 01, 2013, 12:57:32 am
content: Dude, we're not attacking you, we're just discussing it.

author: BiOzZ
author_rank: Regular Contributor
timestamp: May 01, 2013, 01:04:46 am
content: Quote from: c4757p on May 01, 2013, 12:57:32 ami know your not, you have been very kind and helpful in the pastit 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 statesorry for overreacting

author: Harvs
author_rank: Super Contributor
timestamp: May 01, 2013, 01:21:18 am
content: 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...

author: c4757p
author_rank: Super Contributor
timestamp: May 01, 2013, 01:21:29 am
content: And... how long have you been here?? I think the longest we've ever managed to stay on topic is three replies!

author: digsys
author_rank: Unknown
timestamp: May 01, 2013, 02:03:45 am
content: 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 youend 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 :-)

author: c4757p
author_rank: Super Contributor
timestamp: May 01, 2013, 02:05:13 am
content: Quote from: digsys on May 01, 2013, 02:03:45 amYes, in the interest of "staying" on topic, I found "data shit" probablywaymore hilarious than it is. I'd love to see a copy of this data shit.

author: ivan747
author_rank: Super Contributor
timestamp: May 01, 2013, 02:52:38 am
content: Quote from: c4757p on May 01, 2013, 02:05:13 amI 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

author: Psi
author_rank: Super Contributor
timestamp: May 01, 2013, 05:12:38 am
content: If its not under NDA can you post a copy of the datasheet?

author: Bored@Work
author_rank: Super Contributor
timestamp: May 01, 2013, 05:46:34 am
content: Quote from: Harvs on May 01, 2013, 01:21:18 amMaybe it is just to keep the intern busy?

author: smashedProton
author_rank: Frequent Contributor
timestamp: May 01, 2013, 05:50:11 am
content: 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

author: krish2487
author_rank: Frequent Contributor
timestamp: May 01, 2013, 05:57:35 am
content: Quote from: smashedProton on May 01, 2013, 05:50:11 amThat's knowledge..... for / of pleasureSent from my Chaser using Tapatalk 2

author: amyk
author_rank: Super Contributor
timestamp: May 01, 2013, 08:46:18 am
content: I've seen 1300x transistors where the pinout was different from the official ones.

author: Unknown
author_rank: Unknown
timestamp: May 01, 2013, 02:31:37 pm
content: I'm getting on in years, but from the first post...QuoteStill chuckling...

author: c4757p
author_rank: Super Contributor
timestamp: May 01, 2013, 02:43:56 pm
content: Quote from: smashedProton on May 01, 2013, 05:50:11 amHehe... I like it that way. (No, notthatway, you pervert!) Save the militant on-topicism for lecture halls! You learn morefunknowledge that way.

author: c4757p
author_rank: Super Contributor
timestamp: May 01, 2013, 02:45:35 pm
content: Quote from: amyk on May 01, 2013, 08:46:18 amThat 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...

author: Jon86
author_rank: Frequent Contributor
timestamp: May 01, 2013, 03:52:19 pm
content: Can we have a link to the data shit?

author: kfitch42
author_rank: Frequent Contributor
timestamp: May 01, 2013, 05:21:24 pm
content: I googled forfiletype: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" NCP1203gives not results.

author: AlfBaz
author_rank: Super Contributor
timestamp: May 02, 2013, 04:06:28 am
content: I always thought data shit was a serial stream from an arduino

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 02, 2013, 05:29:23 am
content: Quote from: AlfBaz on May 02, 2013, 04:06:28 amPay that.

author: opablo
author_rank: Regular Contributor
timestamp: May 02, 2013, 06:22:21 pm
content: Quote from: ivan747 on May 01, 2013, 02:52:38 amWAIT 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

author: c4757p
author_rank: Super Contributor
timestamp: May 02, 2013, 06:43:30 pm
content: 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".

author: opablo
author_rank: Regular Contributor
timestamp: May 02, 2013, 06:52:00 pm
content: So I was lucky !... I was pronouncing both of them with a strong spanish I sound... shItThanks for taking the time to help a southern nerd

author: ivan747
author_rank: Super Contributor
timestamp: May 02, 2013, 06:57:39 pm
content: Quote from: opablo on May 02, 2013, 06:52:00 pmThese seems to happen to a lot of people then!

author: Unknown
author_rank: Unknown
timestamp: May 02, 2013, 08:18:42 pm
content: QuoteCognitively, that vowel is missing a B ?

author: c4757p
author_rank: Super Contributor
timestamp: May 02, 2013, 09:40:46 pm
content: Quote from: vlf3 on May 02, 2013, 08:18:42 pmShould I feel stupid for not getting the joke?

author: c4757p
author_rank: Super Contributor
timestamp: May 02, 2013, 09:46:28 pm
content: Quote from: opablo on May 02, 2013, 06:52:00 pmYou were indeed - not only was "sheet" correct, but nobody who recognizes a Spanish accent will ever misunderstand your pronunciation of "shit".

author: Unknown
author_rank: Unknown
timestamp: May 02, 2013, 09:54:40 pm
content: Don't be concerned c4757p... it's just my word asocassion relationship Shit, with Vowel &VB owel.

author: AlfBaz
author_rank: Super Contributor
timestamp: May 03, 2013, 01:12:26 am
content: 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

author: c4757p
author_rank: Super Contributor
timestamp: May 03, 2013, 01:17:36 am
content: Quote from: AlfBaz on May 03, 2013, 01:12:26 am"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!

author: opablo
author_rank: Regular Contributor
timestamp: May 03, 2013, 06:55:33 pm
content: hey c4757p... why do you know so much about spanish ? where are you from ? (el foro dice que sos un gringo...)