hybridfree/eevblog-posts huggingface dataset:
Can these universal programmers read/write more modern eeprom? If not, what does - Page 1
Forum section: electronics / general

author: XOIIO
author_rank: Super Contributor
timestamp: May 16, 2014, 09:55:22 am
content: Hey all, saw the (old) video on the $50 universal programmer, it looks pretty great, and they are right around that price:http://www.ebay.ca/itm/USB-MiniPro-TL866CS-Universal-BIOS-Programmer-EEPROM-FLASH-8051-AVR-GAL-PIC-SPI-/251290816206?pt=LH_DefaultDomain_0&hash=item3a82198eceI do have a couple EPROMS, but not many other chips, the stuff that would be more interesting is being able to read/write modern i2c eeprom chips, I'm doubting these can do it, if they can great, if not, I am wondering that can? A similar program interface where you could read/write, see the data and save it to a file would be awesome.

author: mariush
author_rank: Super Contributor
timestamp: May 16, 2014, 10:48:21 am
content: i2c chips are very easy to read and write. Pretty much any decent PIC chips has i2c functionality built in, it would take maybe 20 minutes to write a program to read the eeprom and send it to pc through serial.Arduino also has i2c and I think there's even some ready made example program in the Arduino ide to read or write a byte to i2c eeprom.

author: Thor-Arne
author_rank: Unknown
timestamp: May 16, 2014, 11:22:57 am
content: It supports the CAT24C32, only one I've tested.Check thesupport listfor specific devices.

author: amyk
author_rank: Super Contributor
timestamp: May 16, 2014, 12:37:00 pm
content: I2C EEPROMs are pretty standard, there are a ton of 24Cxx devices in that support list, they'll all be basically the same protocol.

author: SeanB
author_rank: Super Contributor
timestamp: May 17, 2014, 04:39:19 pm
content: Buy a Bus Pirate, and it will do pretty much any I2C memory out there.
Welder in 15 minutes and Marx generator with a tree branches [youtube talent] - Page 1
Forum section: electronics / general

author: wraper
author_rank: Unknown
timestamp: May 14, 2014, 12:59:22 pm
content: Found a new talent on youtube. Guy speaks in Russian but seems to be from Ukraine. In the first video he uses branches of tree as resistors and old TV for Marx generator. In the second he made a welder powered directly from mains with the jar of salty water as ballast resistor. He even showed how to distinguish phase from neutral: there must be sparks from phase to ground. Funny thing, he says that one should be careful when using such a welder.

author: staxquad
author_rank: Frequent Contributor
timestamp: May 14, 2014, 05:35:11 pm
content: Quote from: wraper on May 14, 2014, 12:59:22 pmhope he doesn't play with that welder much, blindness might result

author: SeanB
author_rank: Super Contributor
timestamp: May 15, 2014, 06:22:14 pm
content: think Photon has some competition....
Official Arduino robot, too expensive? - Page 1
Forum section: electronics / general

author: electrolux
author_rank: Regular Contributor
timestamp: May 15, 2014, 01:57:28 pm
content: The first official Arduino robot has been launched (http://arduino.cc/en/Main/Robot) but it does seem rather expensive to meat £169.99 from Maplinhttp://www.maplin.co.uk/p/arduino-robot-n15dd.is it really expensive or is it just me? :-//After all it is meant for hobbyists and I'm one but that'll blow my money boxand I really want one.

author: Towger
author_rank: Super Contributor
timestamp: May 15, 2014, 02:03:56 pm
content: Maplin were charging €40 for a Arduino Uno here, while I could get one delivered from China (complete with 'Made in Italy') for about €7. If you can wait a few of weeks they will appear on eBay...

author: electrolux
author_rank: Regular Contributor
timestamp: May 15, 2014, 02:05:23 pm
content: Quote from: Towger on May 15, 2014, 02:03:56 pmOk fine, and link please for $7 ard board.

author: electr_peter
author_rank: Unknown
timestamp: May 15, 2014, 02:14:40 pm
content: I would not recommend to buy this robot if you want to learn Arduino as a programming platform. I would suggest to buy cheaper single Arduino or Arduino compatible board and learn on it.For example, a UNO R3 clonehttp://www.ebay.com/itm/UNO-R3-ATmega328P-ATmega16U2-2014-Version-Board-Free-USB-Cable-For-Arduino-/300948763268?pt=LH_DefaultDomain_0&hash=item4611f1b284If you are interested in robotics and autonomous cars, eBay has to offer pretty decent car kits of 2WD and 4WD variation.http://www.ebay.com/itm/DC-3v-5V-6V-4WD-Robot-Smart-Car-Chassis-Kits-car-w-Speed-Encoder-for-Arduino-/111282270641?pt=LH_DefaultDomain_0&hash=item19e8f0b1b1http://www.ebay.com/itm/2WD-Motor-Smart-Robot-Car-Chassis-Kit-Speed-Encoder-Battery-Box-For-Arduino-1-48-/350842133169?pt=LH_DefaultDomain_0&hash=item51afd21ab1

author: Towger
author_rank: Super Contributor
timestamp: May 15, 2014, 02:56:58 pm
content: Quote from: electrolux on May 15, 2014, 02:05:23 pm€=Euro: €7 is a little over $9.50http://www.ebay.com/itm/Version-Board-ATmega328P-UNO-R3-CH340T-Instead-16U2-Free-USB-Cable-for-Arduino-/201062417018?pt=LH_DefaultDomain_0&hash=item2ed041027ahttp://www.ebay.com/itm/Version-Board-ATmega328P-UNO-R3-CH340T-Instead-16U2-Free-USB-Cable-for-Arduino-/111316745969?pt=LH_DefaultDomain_0&var=&hash=item19eafebef1http://www.ebay.com/itm/2013-Version-Funduino-UNO-R3-ATMEGA-328P-Arduino-Compatible-/371061788848?pt=LH_DefaultDomain_0&hash=item56650190b0

author: dannyf
author_rank: Super Contributor
timestamp: May 15, 2014, 03:07:03 pm
content: QuoteYou have to love capitalism...
Photonicinduction's New video.. Please look (part2) - Page 1
Forum section: electronics / general

author: JoannaK
author_rank: Frequent Contributor
timestamp: February 15, 2014, 10:23:17 pm
content: I can't find the old thread.. but I'm sure there are some who donated to this.. so it's only proper to see this. Photonnic delivering the 10 Thou Pounds to Ashley. (over 15000 USD) It's not yet enough for artificial leg (better one) but it's a huge sum .Edit: Found it ..https://www.eevblog.com/forum/chat/photonicinduction%27s-new-video-please-look/msg351064/#msg351064

author: dexters_lab
author_rank: Unknown
timestamp: February 15, 2014, 10:39:58 pm
content: it popped up in my youtube earlier tonight, it's a great vid...pleased photon raised so much, it's surprising what can be done in what is a small community.I wish Ashley all the best for the future!

author: plakat
author_rank: Newbie
timestamp: February 16, 2014, 12:22:25 am
content: I fully agree with you ,I'm new in the forum ,but followed photon on YouTube for ages ,a good lad and solid heart ,and great entertainer ,and clearly a very good friend to have ,I don't know him or ash personally but we all breath the same air .....

author: Yago
author_rank: Frequent Contributor
timestamp: May 12, 2014, 08:50:00 pm
content: Sorry for the bump!Just found Photon's vids and this one too.A nice thing to do and a funny guy too!

author: Stonent
author_rank: Super Contributor
timestamp: May 13, 2014, 06:43:00 am
content: He had/has another channel where he doesn't do things "in character" but for the life of me I can't remember what it was called.

author: Yago
author_rank: Frequent Contributor
timestamp: May 13, 2014, 11:46:59 am
content: Is he an active member here?
Make power supply design fast and easy with WEBENCH - Page 1
Forum section: electronics / general

author: Legit-Design
author_rank: Frequent Contributor
timestamp: February 04, 2014, 06:52:27 pm
content: Watch an animated video that demonstrates the value of WEBENCH Design Tools.

author: Phaedrus
author_rank: Frequent Contributor
timestamp: February 04, 2014, 07:12:43 pm
content: WEBENCH is ok, but you're limited strictly to Ti solutions, which may be inferior to the competition. If they don't have a suitable chip for your application it's useless. Their parts picker is a bit wonky, so I wouldn't use the default generated BOM (they need to give you a way to specify 0402, 0603, or 0805 size passives during BOM creation, for instance). They need to give you access to some better simulation, aside from their base V/I/P/E calculations, for instance to test transient performance. And I would still want to go over their schematic with a fine toothed comb before doing layout.It's not a bad tool overall though. Just limited.

author: senso
author_rank: Frequent Contributor
timestamp: February 04, 2014, 09:04:49 pm
content: So...You didn't notice his "third" leg in the movie and in the screen shot?

author: Phaedrus
author_rank: Frequent Contributor
timestamp: February 04, 2014, 09:08:11 pm
content: Nope. I do now. lol

author: MatCat
author_rank: Frequent Contributor
timestamp: February 04, 2014, 09:22:26 pm
content: I doubt the third leg is intentional, the way it's animated he grabs the box and goes off with it, I think someone wasn't thinking about how it would look afterward.

author: tom66
author_rank: Super Contributor
timestamp: February 04, 2014, 10:34:26 pm
content: I've generally found it to be OK, but it doesn't always pick good solutions. I've had it suggest buck converters where an LDO would be more efficient, etc.

author: casinada
author_rank: Frequent Contributor
timestamp: May 14, 2014, 04:14:42 am
content: This video was posted in March 2014 by TI:http://focus.ti.com/general/docs/video/Portal.tsp?entryid=0_1rhmbexc&lang=en&DCMP=sva-web-schematic-en&HQS=sva-web-schematic-em-v-enIt has a library with 40000 components, you can modify base designs and create your own and then export to your favorite software to make the PCB.I never used it. Was it always like this? It looks cool.
XKCD creator gives Ted talk  - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: May 11, 2014, 04:43:51 pm
content: http://feedproxy.google.com/~r/TEDTalks_video/~3/JmdhjLZmM4k/randall_munroe_comics_that_ask_what_ifJust in case anybody is interested in Xkcd, a short Ted talk given by the creator.http://feedproxy.google.com/~r/TEDTalks_video/~5/8oGEHVG25TM/RandallMunroe_2014.mp4

author: scientist
author_rank: Frequent Contributor
timestamp: May 12, 2014, 06:22:04 am
content: Wasn't Randall supposed to be banned from TED?For those who don't like sneaky proxy links, here:http://www.ted.com/talks/randall_munroe_comics_that_ask_what_if

author: hammondlewis
author_rank: Newbie
timestamp: May 12, 2014, 06:44:40 am
content: Quote from: wilfred on May 12, 2014, 06:39:02 amI came to comment on how irritating click-baity the subject line was, only to discover that yeah, I am interested. I love Randall's stuff. Thanks.

author: SeanB
author_rank: Super Contributor
timestamp: May 12, 2014, 06:37:59 pm
content: I did it that way, as it seems that XKCD is a very popular theme here.Of course it is a permanently open tab on the browser as well.

author: echen1024
author_rank: Super Contributor
timestamp: May 13, 2014, 01:40:39 am
content: Quote from: SeanB on May 12, 2014, 06:37:59 pmMuch like the forum and email?
National's "Analog University"? - Page 1
Forum section: electronics / general

author: silvas
author_rank: Newbie
timestamp: May 11, 2014, 06:10:24 pm
content: So I was just watching the episode "Analog Computers" on Bob Pease's Analog by Design show, and I noticed that he mentions a program by National (now absorbed by TI) called "Analog University" (seehttp://youtu.be/9cpTZcXdCDY?t=3m19s).It seems like this Analog University might have (had?) really interesting/useful content, but I can't seem to find very much information on it, and the links given in the show are dead. Really all I've been able to find about this Analog University thing is:- An article from powerelectronics.com ~2003http://powerelectronics.com/news/national-semiconductor-launches-analog-university-online-0- An old announcement ~2003http://newscenter.ti.com/index.php?s=32851&item=124987- A flyer from ~2005http://pdf.datasheetarchive.com/indexerfiles/gl/Datasheet-097/DSA00141350.pdfFrom the lack of information, I'm guessing "Analog University" was discontinued (due to TI acquisition? or RAP's death? I'm just guessing here). Does anybody have any concrete information about this? This is from way before I started getting involved with electronics; maybe some of the people here that have been involved with electronics longer remember this stuff first hand (early-mid 2000's)?

author: steve30
author_rank: Frequent Contributor
timestamp: May 11, 2014, 08:50:21 pm
content: I remembered using the site a while back when I was at college, so I just checked the document I wrote, and I accessed it in 2012. Seemed like a good site if I remember correctly.Unfortunately it no longer seems to be there. I just checked it on the Wayback machine (web.archive.org), and there seems to be some archived stuff, but not everything.

author: DaveW
author_rank: Frequent Contributor
timestamp: May 12, 2014, 12:28:22 pm
content: From Analog Devices rather than National/TI, but if you're looking for that sort of thing, the Real Analog course covers similar material. It's based around the Analog Discovery board, but most of it is reasonably generic,http://www.digilentinc.com/Classroom/RealAnalog/index.cfm
resistance window tester - Page 1
Forum section: electronics / general

author: smashedProton
author_rank: Frequent Contributor
timestamp: May 10, 2014, 12:13:17 am
content: Hello electronics community,I have a unique challenge for you! I tried to design a simple circuit with only discrete components that can test if a resistor value is within a window. It would have only one digital output that would be on if it passes, or off if it fails. I don't really know how to design a circuit like this so I am making it a challenge for you all. I know that it could be done with a microcontroller very easily but I feel like there is an easier way. Also, I love and prefer working with discrete components. The resistance range that I am concerned with is 1 to 1.2 ohms. happy building!

author: dannyf
author_rank: Super Contributor
timestamp: May 10, 2014, 12:19:57 am
content: Google window comparator.

author: smashedProton
author_rank: Frequent Contributor
timestamp: May 10, 2014, 12:37:23 am
content: Yup.. Sorry, I didn't think at it enoughHigh school has gotten me depressed earlier this year and I lost interest in electronics, so I am a little out of it.This is what I have right now:http://gyazo.com/d254902295195670c9885f7804f5fba3
This is funny .. sorry could not stop it , I had to share  - Page 1
Forum section: electronics / general

author: calin
author_rank: Regular Contributor
timestamp: May 07, 2014, 06:43:00 am
content: So watch out .. GND has to be in holly water for the whole thing to work ..http://imgs.xkcd.com/comics/circuit_diagram.png

author: steve30
author_rank: Frequent Contributor
timestamp: May 07, 2014, 10:24:20 am
content: Hehe.I've lost count of how many times this has been posted on various forums (including this one), but it never looses its funnyness.

author: TVman
author_rank: Frequent Contributor
timestamp: May 07, 2014, 02:39:47 pm
content: Quote from: steve30 on May 07, 2014, 10:24:20 amSo true.

author: lemmegraphdat
author_rank: Frequent Contributor
timestamp: May 08, 2014, 12:28:54 am
content: Angular Momentum. It turns me into mush.

author: jh15
author_rank: Frequent Contributor
timestamp: May 08, 2014, 05:01:22 am
content: When you talk to a layman (interesting word), they associate water as conductive to electricity. Purified water is an insulator. So isn't holy water supposed to be pure? Then it would be a bad ground.

author: calexanian
author_rank: Super Contributor
timestamp: May 08, 2014, 05:13:27 am
content: That one has been around for a while. Every time you look at it you see something new.This is also a good one for those familiar with Harbor Freight tools. For those out of the U.S. harbor freight sells super cheap crap you see online, but in a store.http://www.flutterby.com/images/2012/10/01/hf_tool_sale.pdf

author: jh15
author_rank: Frequent Contributor
timestamp: May 08, 2014, 05:31:39 am
content: That is so funny . HF just opened here, and I am stocking up so much free or free with any purchase stuff.Using coupons, I've gotten many no purchase required stuff: free 27 led flashlights, screwdriver sets, (none yet stripped heads), (torches for the limeys).Or free with any purchase, many dvm's, now no purchase required, clamps,If purchase required, tons of cable ties or third hands for a buck or two.

author: TVman
author_rank: Frequent Contributor
timestamp: May 08, 2014, 04:18:33 pm
content: Quote from: calexanian on May 08, 2014, 05:13:27 amI could use the screwdriver set because I Can't find anything.
Maths book for electronics - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: May 08, 2014, 02:37:44 pm
content: I'm looking to learn some maths to complement electronics. A colleague has recommended Engineering Mathematics by J.O. BirdDoes anyone has any comments or suggestions on better books ?

author: Andy Watson
author_rank: Super Contributor
timestamp: May 08, 2014, 02:44:28 pm
content: For self-study, I would recommend "Engineering Mathematics" by K.A.Stroud. I have several colleagues who sacked-off the lectures and passed their Uni maths using Stroud. The downside is that they don't make good reference books - if you want to check or revise a method you end-up repeating the exercises again (although that may be no bad thing).

author: Simon
author_rank: Unknown
timestamp: May 08, 2014, 03:46:00 pm
content: Being a little dyslexic I'd need something i can refer back to in small chunks instead of having to reread whole chapters because an exercise is a further development of a previous topic.
good program for dealing with scans, putting together nice technical documents - Page 1
Forum section: electronics / general

author: SArepairman
author_rank: Frequent Contributor
timestamp: May 07, 2014, 01:30:20 am
content: What is a good imaging editing program for dealing with scans? Something that can like, vectorize (?) a image so it does not lose readability when it is shrunk down, and easily rotate images/equations/"selected" blocks.I only need very basic functionality, MS paint is kind of shit, especially when it comes to re-sizing images (it becomes unreadable), and its not very intuitive, I would like something that I could say draw a box around, click on the corner of the box to shrink it, then click on the corner of a box to rotate it to the desired angle.The best method I came up with so far is to print all my scans, use a exacto blade to cut out what I need, arrange it with scotch tape on a paper, then scan it AGAIN and then print a reduced size version, cut it out again, etc. I am stuck 30 years ago, but is this the best method? Sadly it works better then MS paint.I remember there was some half-decent program that I used in high school for doing this, that was just complicated enough for what I need. Photoshop is an over complicated bastard and GIMP requires a PHD in reverse engineering (and knowledge of photoshop) to use.I want something quick and dirty that will replace exacto knife, tape and acrobat PDF "4 pages per page shrink method"once knowledge of semiconductor manufacture is gained it can be applied to all facets of life.oh, actually word 2013 works great, I remember trying the same thing with a earlier version of word and it would totally pixalate and destroy anything I tried to modify.

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: May 07, 2014, 11:42:09 am
content: http://vectormagic.com/homeErik

author: BravoV
author_rank: Super Contributor
timestamp: May 07, 2014, 11:45:16 am
content: Freeware ->http://potrace.sourceforge.net/

author: david77
author_rank: Frequent Contributor
timestamp: May 07, 2014, 12:49:27 pm
content: In the past I've used Adobe PageMaker instead of the manual cut and paste method to arrange the layout and draw boxes around things. IIRC that worked much better for that purpose than a proper word processor program.
Does Dave play or likes cricket ? - Page 1
Forum section: electronics / general

author: yashrk
author_rank: Frequent Contributor
timestamp: May 06, 2014, 07:28:40 pm
content: Dave is an Australian and they have very good teamso I was curious does Dave watch cricket or plays it.

author: Stonent
author_rank: Super Contributor
timestamp: May 06, 2014, 11:51:15 pm
content: I never got the impression Dave was particularly interested in any kinds of team sports.

author: AlfBaz
author_rank: Super Contributor
timestamp: May 07, 2014, 05:53:39 am
content: He don't like cricket... no, no... he loves it

author: SeanB
author_rank: Super Contributor
timestamp: May 07, 2014, 06:14:33 am
content: He does love extreme sports like canyoning and obstacle courses. Those are on the Altzone YT channel.

author: tszaboo
author_rank: Super Contributor
timestamp: May 07, 2014, 06:35:23 am
content: I doubt that anyone outside India would be interested in cricket. On the other hand, handball must be something everyone follows, right, RIGHT???

author: EEVblog
author_rank: Unknown
timestamp: May 07, 2014, 09:46:14 am
content: Quote from: Stonent on May 06, 2014, 11:51:15 pmYes, I do, I spend many an hour sitting watching sport, as do most aussies.Rugby League (NRL) primarily, the wife (who used to play it) got me into tennis, and yes, cricket, but not so much these days. But cricket is popular when going to family events, the men hang out in the bar watching the cricket usually.I'd watch cricket all day when I was a kid.As far as playing, I'm not a team sport person, I can't tolerate slackersLast time I played a team sport was soccer when I was a kid, stopped that at about 12.

author: yashrk
author_rank: Frequent Contributor
timestamp: May 07, 2014, 10:21:04 am
content: Quote from: EEVblog on May 07, 2014, 09:46:14 amWell here in India there is cricket season going on with IPL and have to say Australian players are dominating the game !!
why EE make the big bucks - Page 1
Forum section: electronics / general

author: SArepairman
author_rank: Frequent Contributor
timestamp: May 05, 2014, 04:41:49 am
content: Din = #/eV-cm^3now find out how many selfies there are per #^2/cm^3-s^2

author: TVman
author_rank: Frequent Contributor
timestamp: May 07, 2014, 04:10:04 am
content: What?

author: Stonent
author_rank: Super Contributor
timestamp: May 07, 2014, 05:02:06 am
content: Something about his car using 100 kiloliters per hectare or something like that.

author: miguelvp
author_rank: Super Contributor
timestamp: May 07, 2014, 05:04:02 am
content: Quote from: TVman on May 07, 2014, 04:10:04 amEnergy density. For example Cosmic Rays have a ~1/1eV per cm^3 Star Light has ~1/3eV per cm^3Assuming he meant - as a per or /Edit: As in electron Volts per cubic centimeter.But the selfies reference has me stumped.

author: TVman
author_rank: Frequent Contributor
timestamp: May 07, 2014, 05:10:20 am
content: oh....

author: miguelvp
author_rank: Super Contributor
timestamp: May 07, 2014, 05:17:42 am
content: Quote from: TVman on May 07, 2014, 05:10:20 amNothing easy about it, it's some kind of puzzle or joke, no reason to facepalm

author: TVman
author_rank: Frequent Contributor
timestamp: May 07, 2014, 03:08:41 pm
content: Quote from: miguelvp on May 07, 2014, 05:17:42 amok, it just looked like a bunch of gibberish.

author: senso
author_rank: Frequent Contributor
timestamp: May 07, 2014, 03:20:13 pm
content: The # is probably a reference to all the hashCrap one can find in twiter, facebook, instagram and similar things..+

author: electrolux
author_rank: Regular Contributor
timestamp: May 08, 2014, 11:06:57 am
content: Quote from: TVman on May 07, 2014, 03:08:41 pmIt does.
Starting a Makerspace/Hackerspace in Singapore - Page 1
Forum section: electronics / general

author: nigelpro123
author_rank: Newbie
timestamp: May 07, 2014, 08:32:15 am
content: Hi, This is mainly for Singaporean forum members but u are all welcome to give suggestions. I am a 14 year old student and an avid maker. I hope that I will be able to start a hackerspace for electronics and mechanical enthusiasts which will appeal to both adults and children. However i cannot do this alone. I hope that you can kindly help me spread the word and find some people (or you yourself) to help me start this hackerspace. I would also kindly appreciate any advice you can give me. You can pm me or contact me at nigelpro123@live.com. Thanks and happy making!Sincerely, Nigel Chin
Multimeter Overshoot: Aside from data logging, is there any other big issue? - Page 1
Forum section: electronics / general

author: XOIIO
author_rank: Super Contributor
timestamp: May 06, 2014, 01:21:38 pm
content: Hey all, something pretty much everyone checks for when reviewing a multimeter is overshoot, and it seems to pretty much be a universally bad thing, but I am wondering, aside from if you were doing data logging, what other situation would it really be a problem in? I am trying to think of other reasons it would be bad aside from being a sign that the company who made it did not want to spend the extra to make sure it does not overshoot (still not 100% clear on what exactly causes it) but is it just more of a nit pick than a real issue?

author: electronics man
author_rank: Frequent Contributor
timestamp: May 06, 2014, 01:23:14 pm
content: It's a bit of a nit pick, it just means you have to wait a bit longer for measurements, I can't think of any other reasons.

author: retiredcaps
author_rank: Super Contributor
timestamp: May 06, 2014, 09:41:10 pm
content: A while back I was trying to fix an ATX PSU. It would power up and then turn off really quickly (less than 1 second). I figured out that the 12V rail was way overspec by using my Fluke 87V. It read something like 14.7V when first turned on and then dropped down to 0. Knowing that the 87V does not overshoot led me to find a bad capacitor on the 12V rail. Once I replaced that capacitor, the ATX PSU worked fine.If your meter always overshoots on the initial reading, how would you solve the problem above?I had an Extech EX430. For a simple standard 9V battery, it would read 18.1V, then 9.04, then 9.03 and then finally 9.01V (after 2 seconds). If I used the EX430 for the above problem, I would still be trying to fix the ATX PSU.

author: SeanB
author_rank: Super Contributor
timestamp: May 07, 2014, 06:12:48 am
content: If you know it overshoots then use manual range and it will not overshoot. This only occurs when the meter does a range switch, and the first reading has a large value because the input sampling circuit is recovering from the transient overload on the input.
Help identifying a chip P3366 K70V_F8736 - Page 1
Forum section: electronics / general

author: OP
author_rank: Newbie
timestamp: May 05, 2014, 05:43:39 pm
content: I don't have any experience at all working with SMD components, and having trouble identifying a chip.Larger image:

author: krish2487
author_rank: Frequent Contributor
timestamp: May 05, 2014, 05:54:38 pm
content: Its a IRF Mosfet.IRF8736.Google will give you the DS.

author: OP
author_rank: Newbie
timestamp: May 05, 2014, 07:23:20 pm
content: Quote from: krish2487 on May 05, 2014, 05:54:38 pmThank you so muchHow did you figure out it was the IRF8736 (as in, how did you figure out the "IRF" part)?

author: SeanB
author_rank: Super Contributor
timestamp: May 05, 2014, 07:36:26 pm
content: IR logo on the top of each chip, and that there are 3 pins connected to a fat trace on top and 4 on the bottom, leaving only one as the gate lead. Thus power mosfet from International Rectifier, and then you just look for the part number using the regular IR prefix of IRF ( International Rectifier Field effect transistor).

author: DavidDLC
author_rank: Frequent Contributor
timestamp: May 05, 2014, 07:50:56 pm
content: Once you figure out about the component, check the datasheet, look for: Part Marking Information, to be 100% sure that is the part in question.David.
smd part marked LD50 SOT223 possible match found need proof - Page 1
Forum section: electronics / general

author: Kjelt
author_rank: Super Contributor
timestamp: May 04, 2014, 08:00:53 pm
content: Hi all,I am currently busy cleaning up my SMD surplus parts and most of them are "finds".I have already positively identified some 30+ parts but now I have encountered one i can not find absolute proof of identity for:Package: SOT223Marking on part: LD50 and below: F013Manufacturer: ST (marked on part)Suspected candidate: LD1117D50 5.0V LDO regulatorHowever I can't find anywhere if this is true. I found the datasheet and **** me, no marking codes mentioned in that datasheet, how bad of ST not to supply these.So I tested the suspect by connecting it: 8V on the input and yes I do measure 5.0 V on the output but I really really want to be 100% sure before I am going to use these parts in any of my design, otherwise I better throw them away.Who can find and give me the magic match between the SMD coding and the partnumber?Thanks.

author: mariush
author_rank: Super Contributor
timestamp: May 04, 2014, 08:06:51 pm
content: There's no universal smd code database, and manufacturers don't have one location to store all their markings.1117 has about 1.2 voltage drop so if your put some load 100-200mA on your regulator and it goes out of regulation when you go below 6v, then you know it's a 1117.You ca also check the current limit, such an IC should be capable of 400-600mA max so it should current limit above that value.. see datasheet and you can check it out and confirm.
Were's "posts since last visit link gone? - Page 1
Forum section: electronics / general

author: AlfBaz
author_rank: Super Contributor
timestamp: May 04, 2014, 09:20:10 am
content: Both links that usually reside at the top left of the page are gone on both my androids default browser and on IE on my desktop.

author: XOIIO
author_rank: Super Contributor
timestamp: May 04, 2014, 09:34:38 am
content: It's still right under "Hello XOIIO" in IE for me.

author: AlfBaz
author_rank: Super Contributor
timestamp: May 04, 2014, 09:58:09 am
content: I'd buy the "it's me" line if it wasn't happening on both my tablet and desktop. Also tried firefox on my desktop, same thing.Maybe it has something to do with my account? I certainly haven't touched anything in my profile settings

author: XOIIO
author_rank: Super Contributor
timestamp: May 04, 2014, 10:04:07 am
content: Hmm, that's really strange.

author: AlfBaz
author_rank: Super Contributor
timestamp: May 04, 2014, 10:11:26 am
content: Argh... never noticed this before and it must remember for the user login, hence why I was getting it across devices.Pretty weird "feature"Must of hit it on my tablet with my large apelike fingersClicking on this arrow...Produces this...

author: EEVblog
author_rank: Unknown
timestamp: May 04, 2014, 10:17:55 am
content: Oh yeah, I did that once by accident and I was confused for ages!

author: AlfBaz
author_rank: Super Contributor
timestamp: May 04, 2014, 10:45:35 am
content: Quote from: EEVblog on May 04, 2014, 10:17:55 amLOL, I'm in good company then

author: electrolux
author_rank: Regular Contributor
timestamp: May 04, 2014, 02:39:53 pm
content: Quote from: EEVblog on May 04, 2014, 10:17:55 amOn your own forum too Woohoo Astralians can be sily!

author: XOIIO
author_rank: Super Contributor
timestamp: May 04, 2014, 02:59:41 pm
content: Quote from: electrolux on May 04, 2014, 02:39:53 pmIt's because he was viewing the web page upside down
Switch Mode Power Supply Videos - Page 1
Forum section: electronics / general

author: Legion
author_rank: Frequent Contributor
timestamp: May 04, 2014, 02:36:57 am
content: Found this really good series of videos on SMPS by The Post Apocalyptic Inventor. The explanations are clear and the production value is great.https://www.youtube.com/channel/UCDbWmfrwmzn1ZsGgrYRUxoA/feed

author: TVman
author_rank: Frequent Contributor
timestamp: May 04, 2014, 04:14:35 am
content: Thanks for the info.
BTTF - Doc's brain wave analyzer makes the BBC.....maybe! - Page 1
Forum section: electronics / general

author: IanJ
author_rank: Unknown
timestamp: May 07, 2014, 11:57:09 am
content: Doc: Don't tell me anything. Quiet, quiet. I'm gonna read your thoughts. Let's see now, you've come from a great distance?Marty: Yeah, exactly.Doc: Don't tell me! Uh, you want me to buy a subscription to the Saturday Evening Post?Marty: No.Doc: Not a word, not a word, not a word now. Quiet, donations, you want me to make a donation to the coast guard youth auxiliary?So, the first pic below from the BBC's website the other day.............
Does USPS Priority international ship on weekends? - Page 1
Forum section: electronics / general

author: XOIIO
author_rank: Super Contributor
timestamp: May 03, 2014, 04:58:15 pm
content: Not really related to electronics though I guess it is a bit since it's my new multimeter that's coming, does anyone know if USPS priority mail international ships on weekends? I know it says 6-10 business days, however I am guessing/hoping it will be faster than that since I am just in Canada.Anyways, yesterday it was in the ISC san Francisco facility at around 2:30 PM, I'm in Saskatchewan so that's only a 5 hour flight, I'm guessing they send priority stuff over air most often?Anyways I recall seeing something about them shipping on Saturdays, I don't have much experience with USPS, but if they do then maybe there is a chance that it will get here today? That would be awesome, but I doubt it. What do you guys think? Canada post still hasn't picked it up on their tracking system so I am thinking it will probably be next weekI wish that tracking had a live GPS feed of the truck or plane it was on so that you could follow it, that would be awesome lol

author: rdl
author_rank: Super Contributor
timestamp: May 03, 2014, 06:20:02 pm
content: The local Post Offices are closed on weekends, but there are Saturday deliveries. I've shipped several hundred items by USPS over the last few years, I'm fairly certain that items in transit do move from point to point over the weekend.

author: XOIIO
author_rank: Super Contributor
timestamp: May 03, 2014, 06:35:11 pm
content: Quote from: rdl on May 03, 2014, 06:20:02 pmAlright, thanks. I was worried that they just stop moving altogether on the weekends, that would suck.

author: Vgkid
author_rank: Super Contributor
timestamp: May 03, 2014, 06:35:40 pm
content: My local office closes at around 1:00, but the work a few hours later than that.

author: John Coloccia
author_rank: Super Contributor
timestamp: May 04, 2014, 07:38:55 am
content: I've shipped my products to Canada, and generally use priority mail. The last thing I shipped went like this:Mailed on March 5.Makes it to customs on the 9th. That's a Sunday, BTW so it was probably actually delivered to Canada on Saturday, the 8th.Clears customs on the 12th...hey...that's the day my new twin girls were born!Actually delivered on the 14th.So it took 3 days to get to Canada....about what you'd expect with priority mail. Then it took 6 days to clear customs and actually get delivered.I tell my international customers to expect at least 1 week transit time, and often it's closer to two weeks by the time it's all said and done. It takes almost as long to get delivered in Canada as it does when I send my product to Japan. Stuff has to clear customs, and sometimes it sails right through....other times, it sits for a few days..
eMMC - Page 1
Forum section: electronics / general

author: Jane
author_rank: Frequent Contributor
timestamp: May 02, 2014, 08:00:15 pm
content: Is there any description/tutorial how to work with eMMC? How to read or write data ?

author: Hideki
author_rank: Frequent Contributor
timestamp: May 02, 2014, 11:15:08 pm
content: http://www.jedec.org/standards-documents/technology-focus-areas/flash-memory-ssds-ufs-emmc/e-mmc
[ car ultrasonic proximity sensor packaging ] - Page 1
Forum section: electronics / general

author: texane
author_rank: Regular Contributor
timestamp: May 01, 2014, 07:24:31 am
content: Hi,I have a question regarding how ultrasonic proximity sensors are packagedin cars. I thought that there was a grid, but it is not the case, thereis a full cover protecting the sensor. Do you know how it is made ? Arethe thickness and the material of the cover, and the length of the ultrasonic wave adjusted so that the wave does not interact with the cover,but still interact with nearby obstacles ?Thanks for your answers!

author: Rerouter
author_rank: Super Contributor
timestamp: May 01, 2014, 08:47:50 am
content: The cover is within the blind time of the sensors, so it ignores any pulses within the first dozen centimeters, (It takes time for the sensor to stop vibrating after outputting a pulse)
Extension Cord Reel = Stitches - Page 1
Forum section: electronics / general

author: kolbep
author_rank: Frequent Contributor
timestamp: April 29, 2014, 06:43:14 pm
content: Thats right.Some boiler makers on the 3rd level of a local factory decided to pass each other a metal extension cord reel over a void. And the buggers dropped it.I was on the 1st level, just pulling a plastic sheet over a panel, before going to the next job.Man that steel reel hurts. Cut into my head. Blood pouring everywhere.I can still see the look on the cleaning ladies face when she saw the blood rolling down my face.Got a small shave from a sister at the doctor, 3 stitches and a tetanus jab later, i still have a sore head, as well as a bad hair day...On the plus side, the brand new 3 stage vacuum plodder machine now has a nice bloodred tint on parts of it.P

author: SeanB
author_rank: Super Contributor
timestamp: April 29, 2014, 06:54:59 pm
content: That is a shit day you had Peter. Hope you recover fast, though I think you should take the opportunity and even it out with a Roofie haircut again. Hope you take the cleaner a little gift tomorrow, as she probably had to hose down the "reminders" from your head.Never had that, though 2 years ago I went and sliced my hand open replacing a window. Bandage it up and went to the neighbour, who is a nurse and asked for opinion. Opinion was " silly bugger, go to the doc and get some stitches", so i drove to the medical centre, and walked in and waited for the doc. Luckily it was my regular doctor doing a Saturday shift, so he said the same again, and proceeded to do some needlework on me, 4 little stitches. No pain as I took 2 Stopayne when I cut myself, while washing the wound clean and washing with Hibiscrub to make sure. worst part was the local, I know from previous experience that it stings.Looks like it is time to find some boiler makers and introduce them to a few aircon 50uf capacitors just post test from the insulation tester. Preferably in the shower.ps Was the reel still connected, and what brand of reel survives boiler makers?

author: electronics man
author_rank: Frequent Contributor
timestamp: April 29, 2014, 08:19:10 pm
content: You are so lucky it could have been much worse, those silly buggers, I hope they apologised

author: kolbep
author_rank: Frequent Contributor
timestamp: April 30, 2014, 04:52:04 am
content: Nope, no apology from them. But the factory supervisor actually saw them drop it. It looked to him like slow motion.He only realised that it hit somebody when he came around the corner to see where it landed.As they were taking me to the first aid station, he called the chief boilermaker down to explain how stuipid they were.

author: SeanB
author_rank: Super Contributor
timestamp: April 30, 2014, 07:30:53 pm
content: This is South Africa, where those are only needed at soccer matches. Possibly it was not a building site, or they did not put up the signs.

author: PedroDaGr8
author_rank: Super Contributor
timestamp: April 30, 2014, 08:28:15 pm
content: Quote from: kolbep on April 30, 2014, 04:52:04 amThats messed up, I would have expected AT LEAST a damn apology.
Weird ceramic board origins? - Page 1
Forum section: electronics / general

author: daqq
author_rank: Super Contributor
timestamp: April 25, 2014, 02:25:57 pm
content: Hi guys,I got this from a gold scrap harvester guy... I don't know what it's from, or anything. Does anyone have a clue? The processor is a Siemens 186. The real puzzle is the board - it's a ceramic square, with at least 3 layers. There's no high frequency stuff going on there as far as I can see - why would someone go to all that trouble. Doesn't exactly seem to be better suited for space/mil stuff than, well, anything... if anything, it looks more fragile.The only other thing I know about it is that it was a part of a larger system (duh!) with more boards like this (in terms of size, interface, not content) around.So... any clues?Thanks,David

author: daqq
author_rank: Super Contributor
timestamp: April 25, 2014, 02:29:06 pm
content: Oh, and don't mind the crystal frequency, I soldered that on there because the old one wasn't in any useful state, being only legs and part of the package... I tried powering it just out of curiosity.

author: SArepairman
author_rank: Frequent Contributor
timestamp: April 25, 2014, 07:48:03 pm
content: possible for high temperature usethat board might be able to sink alot of heat too

author: hagster
author_rank: Frequent Contributor
timestamp: April 25, 2014, 08:39:27 pm
content: It's thick film technology.http://en.m.wikipedia.org/wiki/Thick_film_technologyLots of reasons for it.High temp,high reliability,low loss substrate etc. Also the substrate needs to be ceramic to withstand the kiln firing to sinter the inks.They often print the resistors directly and laser trim for accuracy.

author: daqq
author_rank: Super Contributor
timestamp: April 30, 2014, 08:35:04 am
content: Thanks. Seems overkill though for a control board. But maybe they were doing all of the boards that way and decided to do it in one run.

author: Kjelt
author_rank: Super Contributor
timestamp: April 30, 2014, 08:43:36 am
content: Looks familiar, I have seen these kinds of sub-boards for PIP (picture in picture) also from Siemens I believe made for Philips in tv sets begin/half 90's must still have a couple of them somewhere. For the PIP unit it had pins attached (where your board has gold fingers) to stick it in a standard female header sockets.I also have seen a couple of this kind of boards in their older VCR's same brand.

author: senso
author_rank: Frequent Contributor
timestamp: April 30, 2014, 08:27:48 pm
content: Even more amazing is the TI chips marked Portugal, now thats a rare thing.
Metcal MX-5200 Teardown - Page 1
Forum section: electronics / general

author: IntegratedValve
author_rank: Regular Contributor
timestamp: January 14, 2014, 05:20:41 pm
content: This is a very interesting detailed teardown of the Metcal MX-5200 soldering station.The most interesting part is the the microwave stuff, looks like alien technology!

author: KJDS
author_rank: Super Contributor
timestamp: January 14, 2014, 06:00:07 pm
content: Is it me, or have you missed something important from your post?

author: IntegratedValve
author_rank: Regular Contributor
timestamp: January 14, 2014, 06:07:36 pm
content: Quote from: KJDS on January 14, 2014, 06:00:07 pmMissed what?

author: rdl
author_rank: Super Contributor
timestamp: January 14, 2014, 06:13:51 pm
content: Some kind of link to the tear down?

author: skipjackrc4
author_rank: Regular Contributor
timestamp: January 14, 2014, 09:25:27 pm
content: Wrong video.

author: AndersAnd
author_rank: Frequent Contributor
timestamp: April 29, 2014, 09:27:30 pm
content: Where's the teardown video? The above video is not a teardown.

author: mamalala
author_rank: Unknown
timestamp: April 29, 2014, 10:26:26 pm
content: Plus, no microwave stuff in Metcals eitherGreetings,Chris
Thick As a Brick - Page 1
Forum section: electronics / general

author: Mr Simpleton
author_rank: Unknown
timestamp: April 29, 2014, 07:33:59 pm
content: Thats me today... could have had the leading role in "Dumb Dumber"I was trying to order a circular bayonet connector for some equipment at work... so turned to PEI Genesis, and found what I needed....CA3106E18-10S to me this is a ITT-Cannon circular bayonet with 18-sized shell and 10 layout for the sockets.... but to my surprise there is aCA3106E18-10SB listed at a higher price, and checking the configuration docs the B is not listed as an option. This had me puzzled. So I shot a e-mail to PEI support, which responded quickly... B stand for bayonet! Ehhh wait a minute, theCA-connector family is specified as circular bayonet, why the B?? One more e-mail to the support... Answer was the the bayonet is apparently available in threaded version too and if one is have a bayonet type you better specify BDoh Why would I ever think that a bayonet connector family would be bayonet as standard Me = DumbEarlier today a collegue needed my help, he tried to power an active antenna using the coax to send up the DC, no biggie but the supply he used was a cheapo switch-mode and of course caused all sorts of fun signals... so he asked me to find a linear ps. Now to my surprise linear power supplies are almost like hens teeth, very rare. But after looking at Mascot I saw a model that would do the trick Mascot 6823... Enter in Google and see that RS components do stock this very model... not cheap ~€100 but still available. But wait, there appears to be another model listed 6823 000111 at ~€60. Mascot shows nothing about this number, so "Hello RS tech support" and a quick reply tells me that they are almost identical but the 000111 comes with UK 3 pin mains connector vs. EU 2 pin mains at a €40 difference.

author: MasterBuilder
author_rank: Regular Contributor
timestamp: April 29, 2014, 08:21:07 pm
content: Pricing on RS makes very little sense to me. Today I was looking at type K thermocouple connectors for 50 bucks, when identical looking one are also available for 20 bucks on the same page. Pricing seems to be based on how much stock is available for that part number or some black art.Ordering, part numbers and pricing is to be avoided if at all possible, its a thankless painful job to be passed on to "juniors"
Mike's video on heise.de - Page 1
Forum section: electronics / general

author: mortos360
author_rank: Regular Contributor
timestamp: April 29, 2014, 09:41:46 am
content: http://www.heise.de/newsticker/meldung/Roboter-Schwarm-als-Fabrik-Modell-der-Zukunft-2178785.html
Linear Applications Handbook - Page 1
Forum section: electronics / general

author: IO390
author_rank: Regular Contributor
timestamp: April 28, 2014, 07:24:33 pm
content: So I got this recently:Makes for excellent bedtime reading.And whilst looking through the index I found:Good ol' Jim

author: SeanB
author_rank: Super Contributor
timestamp: April 28, 2014, 07:34:44 pm
content: Yes, worth the read and a reread every so often.

author: echen1024
author_rank: Super Contributor
timestamp: April 28, 2014, 09:39:59 pm
content: I will be on a lookout for this book at my local surplus store. A quick internet search shows that it will make good bedtime reading.

author: TerraHertz
author_rank: Super Contributor
timestamp: April 29, 2014, 04:15:08 am
content: It got bigger over the years.

author: calexanian
author_rank: Super Contributor
timestamp: April 29, 2014, 06:11:17 am
content: Cool!

author: ElektroQuark
author_rank: Unknown
timestamp: April 29, 2014, 06:34:20 am
content: Volumes I & II are available online:Volume IVolume II

author: David Hess
author_rank: Super Contributor
timestamp: April 29, 2014, 08:48:04 am
content: There were four printed volumes but the content of the first thin one was included is the next one marked "Volume I".A lot of the content is also part of the currently available "Analog Circuit Design - A Tutorial Guide to Applications and Solutions" and "Analog Circuit Design - Immersion in the Black Art of Analog Design" both of which were edited by Bob Dobkin and Jim Williams.
New website targeting counterfit components - Page 1
Forum section: electronics / general

author: JonnyBoats
author_rank: Regular Contributor
timestamp: April 28, 2014, 08:39:22 pm
content: Is anyone using The Trusted Global Buyers Network (TGBN)https://www.tgbn.com?Apparently their goal is to address the problem of counterfeit components.Thoughts?

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: April 28, 2014, 10:43:56 pm
content: Every chance to get the info is a good thing .Have you found bad caps site ?http://www.badcaps.net/forum/index.php
Time to go feed the Sarlacc - Page 1
Forum section: electronics / general

author: Stonent
author_rank: Super Contributor
timestamp: April 29, 2014, 02:15:16 pm
content: http://www.nerdist.com/2014/03/the-next-big-thing-in-star-wars-bathroom-fixtures-the-sarlacc-toilet/Time to go drop Boba Fett off at the Sarlacc pit.http://www.toiletsarlacc.com/