hybridfree/eevblog-posts huggingface dataset:
A Brief History of Science: Through the Development of Scientific Instruments - Page 1
Forum section: electronics / general

author: andre_teprom
author_rank: Regular Contributor
timestamp: January 24, 2016, 06:22:52 pm
content: On the verge of a long 10hs flight over the Atlantic at the end on my last vacation, I decided to buy some pocket book in the departure hall to help me sleep faster if the wine was not enough:http://www.amazon.com/Brief-History-Science-Thomas-Crump/dp/B0091MF1GQHowever, I got surprised with the quality and depth addressed by the author ( Thomas Crump ), which can be regarded as both a historian as a scientist. I can say that by his chronological explanation of how science has been developed, linked step by step, in the view of each sccientists discoverers, I became now able to clearly understand much of what had escaped from me at school in relation to physical and chemical.Very interesting, I recommend.
What Connector is it? - Page 1
Forum section: electronics / general

author: Kalu
author_rank: Newbie
timestamp: January 22, 2016, 09:02:02 pm
content: Does anyone know what kind of Connector it is?It's the inverter Connector from a VIA EPIA Nano-ITX board, but i can't find what connecter this might be.Thanks for every help.

author: FivePoint03
author_rank: Regular Contributor
timestamp: January 22, 2016, 09:12:22 pm
content: Molex Picoblade?

author: helius
author_rank: Super Contributor
timestamp: January 23, 2016, 12:08:56 am
content: It looks like Molex Picoblade 53398-0871, but it is hard to tell from such a poor picture. You have a better shot to identify connectors if you measure their pitch, as there are many similar style connectors at different pitches.

author: Brumby
author_rank: Unknown
timestamp: January 23, 2016, 12:17:12 pm
content: If I have it right - this might be useful .... 2 connectors centre bottom:

author: Brumby
author_rank: Unknown
timestamp: January 23, 2016, 12:23:36 pm
content: Pin spacing is the same as PCI card contacts.

author: amyk
author_rank: Super Contributor
timestamp: January 23, 2016, 03:57:26 pm
content: I've definitely seen these connectors used in LCD monitors but can't put a name to them.

author: helius
author_rank: Super Contributor
timestamp: January 24, 2016, 04:19:32 pm
content: Pitch is 1.25mm, the same as PCI, which is consistent with Picoblade.
Microchip to buy Atmel. - Page 1
Forum section: electronics / general

author: McBryce
author_rank: Super Contributor
timestamp: January 22, 2016, 09:36:13 am
content: Did anybody else spot this? I haven't seen it discussed here yet...http://www.nytimes.com/2016/01/20/business/dealbook/microchip-technology-to-buy-atmel-for-nearly-3-6-billion.html?_r=0McBryce.

author: timb
author_rank: Super Contributor
timestamp: January 22, 2016, 10:18:56 am
content: No, the two other threads on the topic haven't.

author: McBryce
author_rank: Super Contributor
timestamp: January 22, 2016, 10:37:33 am
content: Oh thanks, so there are already threads about this. I couldn't find them, but the Forum search has never really impressed me with its results.McBryce.

author: RogerRowland
author_rank: Regular Contributor
timestamp: January 22, 2016, 12:46:34 pm
content: Quote from: McBryce on January 22, 2016, 10:37:33 amIn case you're still in the dark ...https://www.eevblog.com/forum/chat/microchip-to-acquire-atmel-how-do-you-feel-about-this/andhttps://www.eevblog.com/forum/chat/atmel-is-microchip/

author: McBryce
author_rank: Super Contributor
timestamp: January 22, 2016, 01:02:05 pm
content: Thanks for the links. I hadn't gone searching again yet.McBryce.
dave should get one  - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 22, 2016, 01:52:16 am
content: http://www.aliexpress.com/item/Black-Sports-Camcorder-SJ4000-1-5-inch-1080P-Sport-Cam-Vedio-Digital-Camera-Waterproof-Free-Shipping/32588296210.html?spm=2114.01010108.3.288.ipc7N1&ws_ab_test=searchweb201556_3,searchweb201644_5_10001_10002_9992_10005_301_10006_10003_10004_62,searchweb201560_8,searchweb1451318400_6150,searchweb1451318411_6452&btsid=a3dfce29-8ab0-4875-84d7-8c3429d02c9bhe should get one and do a tear down its really cheap

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 22, 2016, 11:55:21 am
content: this would be cool to see a tear down of thishttp://group.aliexpress.com/267635028-32351953171-detail.html?spm=2114.10010108.0.70.3gpiYJ

author: tszaboo
author_rank: Super Contributor
timestamp: January 22, 2016, 12:07:25 pm
content: There is nothing to be learned by tearing down CCC (cheap chinese crap). maybe how not to do things. The first one is probably fake or scam, the price is just not ok.

author: BradC
author_rank: Super Contributor
timestamp: January 22, 2016, 02:39:03 pm
content: Sucker bait.

author: AlxDroidDev
author_rank: Frequent Contributor
timestamp: January 22, 2016, 06:06:20 pm
content: I had one of those cheap GoPro clones, that I got as a gift when I subscribed a magazine. I can't tell if it was that exact model, since they all looked alike.I was unable to disassemble it since its 2 halves where glued together, rather than put together with screws. It did, however, looked like a cheap cellphone camera put on a case 100x the size it needed to be. Without its battery and supposedly waterproof case, it was no heavier than 3-4 AA cells. I made a few seconds of footage with it, and the video looked like the sensor didn't have full HD native resolution, but instead was an upscaled image of whatever crap its sensor could spill out.

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 22, 2016, 09:48:43 pm
content: Quote from: AlxDroidDev on January 22, 2016, 06:06:20 pmone i got that cost me $20 and is a 720p gopro style camera does a decent job

author: Rasz
author_rank: Super Contributor
timestamp: January 23, 2016, 02:28:18 am
content: they both are 720 mjpeg encoded, upscaled VGA res fakes

author: dexters_lab
author_rank: Unknown
timestamp: January 23, 2016, 02:15:53 pm
content: IIRC the real SJ4000 is not that bad a camera given it's a copy of a gopro, problem is there are fakes of the SJ4000 as well
FLUKEs are everywhere - electrical engineering on container vessels - Page 1
Forum section: electronics / general

author: Herr R aus B
author_rank: Regular Contributor
timestamp: January 20, 2016, 02:40:43 pm
content: Just returned from one of my voyages on container vessels (http://blogs.herrrausb.de/fotoblog/?page_id=5850) and what do you know? also there they are using FLUKE multimeters. in this case wile fixing the ship's intercom and some problems with the navigation signal lights - neat!see attachments...

author: vinicius.jlantunes
author_rank: Regular Contributor
timestamp: January 20, 2016, 03:25:06 pm
content: if my wife saw this meter she would not regain piece of mind until it looked yellow again.

author: saturation
author_rank: Super Contributor
timestamp: January 20, 2016, 04:04:35 pm
content: Fluke DMM's are popular in marine use from its bullet proof reputation, particularly in electrically dirty shipboard environments. Add to it gear cannot be replaced until you reach port, and that erroneous readings in mission critical electronics can be a catastrophe, highest reliability is required.https://www.eevblog.com/forum/testgear/hear-kitty-kitty-kitty-nope-not-that-kind-of-cat/msg823175/#msg823175Some explanations of this need. Now, from all the vendors in the above thread it appears Brymen design can be a true competitor for such use, if it competes well in production batch defects and survives ship conditions such as high humidity and temperature shifts from port to port.

author: Lightages
author_rank: Unknown
timestamp: January 20, 2016, 04:47:27 pm
content: If you want a meter for mining, on board ships, trips to completely inaccessible areas with extreme environments, then the options are probably the Fluke 28IIEX, Amprobe HD160, andmaybea Brymen. Brymen does not make intrinsically safe meters, nor are they IP rated so their suitability in extreme environments are not guaranteed. They are not suitable for mining operations where intrinsically safe ratings are needed. They are very well sealed and protected from environmental contamination though.

author: Herr R aus B
author_rank: Regular Contributor
timestamp: January 20, 2016, 06:39:48 pm
content: Quote from: vinicius.jlantunes on January 20, 2016, 03:25:06 pmJep - the first thing i thought was: man, this piece of equipment looks used ;-)

author: nanofrog
author_rank: Super Contributor
timestamp: January 21, 2016, 12:30:26 am
content: Quote from: Lightages on January 20, 2016, 04:47:27 pmI'd add the Gossen Outdoor (IP65) and suspect the new the Agilent U1282A would hack it as well (IP67 rated).
ElectroBoom compilation - Page 1
Forum section: electronics / general

author: zapta
author_rank: Super Contributor
timestamp: November 27, 2015, 04:25:19 pm
content: Plenty of electronic content for your enjoyment.

author: crispy_tofu
author_rank: Super Contributor
timestamp: November 28, 2015, 04:44:55 am
content: Related threads:https://www.eevblog.com/forum/reviews/is-this-guy-for-real-or-just-playing-the-fool-you-decide-funny-to-watch-though/https://www.eevblog.com/forum/chat/is-this-'engineer'-for-real/

author: quarks
author_rank: Frequent Contributor
timestamp: January 20, 2016, 10:15:46 am
content: for me thats beautiful comedy from an exceptionally gifted Electrical EngineerBut I guess you need to have a very strange sense of humor to be able to laughing out loud, because he really does bloodcurding things you never, never, never ever should Do yourself!!!http://www.electroboom.com
25% off Microchip tools coupon expired on me :-( - Page 1
Forum section: electronics / general

author: matseng
author_rank: Frequent Contributor
timestamp: January 19, 2016, 06:59:30 am
content: Awww crapI just realized that the 25% discount coupon for all Microchip Tools that I won in a competition already expired. I thought it was end-of-2016, not end-of-2015. Well.... If you snooze you lose....

author: kripton2035
author_rank: Super Contributor
timestamp: January 19, 2016, 07:09:39 am
content: well it seems that you don't have so many things to order from themor you would have used it earlier !

author: Falcon69
author_rank: Super Contributor
timestamp: January 19, 2016, 07:16:57 am
content: try contacting them, some times companies will still honor the coupons, even IF they have expired.Hell, if it means a sell, vs. no sell, I would honor it.
Do you recognize this 1970s lab/workshop power supply from Sydney Uni?  - Page 1
Forum section: electronics / general

author: gtc
author_rank: Newbie
timestamp: January 18, 2016, 11:47:02 am
content: If there's anyone here who was studying Electrical Engineering at Sydney Uni during the 1970s, do you recognize this variable power supply stamped 'S.U.E.E. Workshop'?(Apologies for the photo quality -- that's how I received it.)
Space Welders Podcast - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: January 18, 2016, 12:32:30 am
content: I was on the Space Welders podcast. 2 hours of nerdy talk. Check it out:http://www.spacewelders.com/episode-21/

author: luky315
author_rank: Regular Contributor
timestamp: January 18, 2016, 02:41:35 pm
content: Sounds interesting, but they distribute it only via iTunes and have no direct mp3 download.No thanks...

author: lapm
author_rank: Frequent Contributor
timestamp: January 18, 2016, 02:57:26 pm
content: I just hate it when theres no mp3 download... I listen my podcast on mobile smart phone, rss feed and im happy to download stuff and listen in...

author: Mechanical Menace
author_rank: Super Contributor
timestamp: January 18, 2016, 03:20:14 pm
content: Quote from: luky315 on January 18, 2016, 02:41:35 pmYou can listen to it through the webpage using the SoundCloud widget at the top of the page. There's also a download link in said widget. Before you even get to the iTunes link...

author: spacewelders
author_rank: Newbie
timestamp: January 18, 2016, 11:35:33 pm
content: Hi everyoneIt's Steve from the Space Welders podcast. Glad you enjoyed the show, was certainly a laugh chatting to Dave.To answer your questions about downloading, you can listen to and download the show directly from SoundCloud (https://soundcloud.com/spacewelders/) which is also embedded into the posts on the website. You can also go directly to our RSS feed location to add to any other podcasting or feed reading software (http://feeds.feedburner.com/spacewelders).We're still trying to get to grips with the whole podcasting thing and feedback like this is incredibly useful. As an aside, what would be the best way to distribute the podcast to make it easiest for you to download and listen to?

author: kuromaku
author_rank: Newbie
timestamp: January 18, 2016, 11:38:31 pm
content: Quote from: spacewelders on January 18, 2016, 11:35:33 pmStatic link to an MP3 file, please. Thanks.

author: spacewelders
author_rank: Newbie
timestamp: January 18, 2016, 11:55:45 pm
content: Quote from: kuromaku on January 18, 2016, 11:38:31 pmHere's the link to the episode with Dave:http://www.spacewelders.com/media/SpaceWeldersPodcast-Episode21.mp3The other episodes are available with the same URL, just changing the episode number. I'm looking into improving the posts to have direct links to iTunes, the RSS feed and the individual files for each episode.
Spreadsheet to Catalogue Parts Inventory - Page 1
Forum section: electronics / general

author: Bryan
author_rank: Frequent Contributor
timestamp: January 17, 2016, 12:02:18 am
content: Hello:Does anyone have or recommend a slick excel spreadsheet to catalogue parts. I have drawers full of ic's that I wanted to catalogue so I can quickly check what I have on hand for projects.

author: rrinker
author_rank: Super Contributor
timestamp: January 17, 2016, 12:57:48 am
content: Don't have one but I could whack something together pretty quick. I'm thinking it probably wouldn't be a bad thing to have for myself - but then I'd never remember to subtract an item from inventory when I used it.

author: RobertHolcombe
author_rank: Frequent Contributor
timestamp: January 17, 2016, 01:06:36 am
content: A solution to that would be to have a clipboard or similar around your parts storage - write down what you use as a reference to periodically update your spreadsheet

author: Bryan
author_rank: Frequent Contributor
timestamp: January 17, 2016, 02:02:08 am
content: Quote from: rrinker on January 17, 2016, 12:57:48 amLot's of inventory excel templates around, thought maybe someone had something more specific to electronic components. I will do the same and just redo one of the many templates out there..

author: rrinker
author_rank: Super Contributor
timestamp: January 17, 2016, 02:43:24 am
content: I'd probably make my own, just need to think about what data I would need to store.I started down that path for my model railroad equipment but someone did a very nice inventory program that I simply modified to add som reports that weren't provided. Still in the pi0le to integrate it with a program to store DCC decoder settings.

author: rich
author_rank: Frequent Contributor
timestamp: January 17, 2016, 03:07:01 am
content: I know spreadsheets seem an easy start but really aren't the right technology for this kind of job imho. Something a bit more databasey gives more chance of data consistency with the ability to search or generate reports, reallocate locations, whatever you desire really.Maybe look for an inventory program as rrinker did before resorting to a spreadsheet?
PWM pic mailbag? - Page 1
Forum section: electronics / general

author: vlad777
author_rank: Frequent Contributor
timestamp: January 15, 2016, 12:15:16 pm
content: Can someone please tell me in what episode Dave gets pic based PWM board?I think he got it in mailbag episode and I think it was suppose to plug to PC.(Maybe it was open hardware. ?)I think it was at least 1 y ago.I thought about trying to search for it but it would mean watching days of video material.Many thanks.

author: miguelvp
author_rank: Super Contributor
timestamp: January 15, 2016, 08:37:07 pm
content: A search on his YouTube channel for PIC PWM Mailbag only shows this oneDated August 27, 2012. It does have a PIC based dev board, not sure if that's the one you were looking for.

author: vlad777
author_rank: Frequent Contributor
timestamp: January 16, 2016, 10:11:23 am
content: Thanks for the reply. That is not the one.I tried YouTube search, it returns everything no matter what you type.
ge c1433 charge via usb - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 16, 2016, 04:01:10 am
content: i got this camera very cheap last week juts the camera look brand new takes nice photos for a point and shoot just wanted some help i did google this but was not much helpthe guy who sold me the camera told me if i have the usb cable and wall usb adapter i can charge the batteries inside the camera but when i put in ever ready AA batteries the screen comes on and oblong box comes up that looks like its charging then gives me a message after a while give me a message cannot connect if i put energizer AA batteries in the camera and try to charge it the camera does nothing i am using NiMH Batterymaybe this camera can't charge via usb?
Playtape - Page 1
Forum section: electronics / general

author: android
author_rank: Regular Contributor
timestamp: January 17, 2016, 12:15:30 pm
content: Here's a trip down memory lane (for some)...https://youtu.be/qBSGuR589_QI lived through the era but have never heard of the Playtape format until now.The remarkable thing is how those RCA batteries (they look like C cells) lasted 50 years without turning into corrosive goo.
Batteries and Supercaps - Page 1
Forum section: electronics / general

author: HP-ILnerd
author_rank: Frequent Contributor
timestamp: January 16, 2016, 12:11:21 am
content: Bit o' interesting news:Li-Superoxide batteries potentially offering five times the energy density of Li-ion:http://spectrum.ieee.org/nanoclast/semiconductors/materials/stable-superoxide-could-usher-in-new-class-of-lithiumair-batteriesAnd zoomier supercaps:http://spectrum.ieee.org/energywise/semiconductors/materials/nitrogen-can-triple-energy-capacity-of-supercapacitors

author: ECEdesign
author_rank: Regular Contributor
timestamp: January 16, 2016, 03:42:42 am
content: Researchers at my Univeristy have been working on metal air batteries for several years now. Im still not too impressed with any lithium battery. Lithium is a constrained resource and it requires Argon gas in the glovebox so the lithium remains unreacted. A huge cost of manufacture.
Water soluable no-clean flux? - Page 1
Forum section: electronics / general

author: macboy
author_rank: Super Contributor
timestamp: January 18, 2016, 08:30:08 pm
content: I came into someAlpha Cleanline 7000 (click)flux core solder, which claims to be no-clean, leaving behind only a soft, clear, non-conductive, non-corrosive residue. All the active parts of the flux apparently volatilize at soldering temperature. The kicker is: It is also water soluble. The action of the flux is very good; this stuff wets and flows nearly as nicely as Kester 44, my benchmark.I remember reading wisdom that water-soluble fluxes, while easier to clean, generally MUST be cleaned due to their corrosive and often conductive nature. I've understood that no-clean fluxes are based on chemicals which, when cooled after soldering, turn into a non-corrosive, non-conductive polymer which also entraps the metal oxides which might otherwise cause leakage currents (good old rosin is a prime example). Because of this polymerization, they leave behind a crusty, often ugly residue that is difficult to probe through, and they are harder to clean, requiring solvents. In other words "no clean" is mutually exclusive with "water soluble". Googling "no clean water soluble flux" finds only comparisons between the two worlds.I have some DMMs with working GOhms ranges, so I tested. Between adjacent Cleanline 7000 joints, there was no measurable conductivity immediately after soldering, nor after adding a blob of distilled water for couple of minutes, nor after cleaning up with water and drying. The claims of "minimal" and "clear, soft" residue are true as well. Could it be true? A no-clean flux that doesn't leave ugly orange-brown residue, and which can be optionally easily cleaned up with water?

author: calexanian
author_rank: Super Contributor
timestamp: January 18, 2016, 10:25:09 pm
content: I have always held the same view that water soluble MUST be cleaned. It is really reactive stuff and considering moisture is a fact of life it will always remain a little mobile and active. Now if this is some new product, I don't know. but if it is water soluble why not rinse it? I will stick with my tried and true practice of sticking with whatever Kester recomends for their solder i happen to be using. We have no clean, RA flux, and water clean in the shop depending on what we are doing.
metallic glue - Page 1
Forum section: electronics / general

author: MapleLeaf
author_rank: Contributor
timestamp: January 11, 2016, 07:45:44 pm
content: Why did i buy a new soldering iron? I can now just glue the parts togetherhttp://www.sciencedaily.com/releases/2016/01/160108205752.htm

author: dexters_lab
author_rank: Unknown
timestamp: January 11, 2016, 07:54:22 pm
content: interesting science there, wonder how the gallium will react with other metals over time... like 5/10/20 years?

author: grumpydoc
author_rank: Super Contributor
timestamp: January 11, 2016, 08:20:45 pm
content: And if you wish to "unglue" something, perhaps to repair it.....?Perfect for today's world of built-in obsolescence

author: miguelvp
author_rank: Super Contributor
timestamp: January 12, 2016, 05:10:19 am
content: So Aluminum reacts with water and releases Hydrogen, the problem is that it oxidizes so the reaction can't be maintained, but Gallium prevents the Aluminum from oxidizing producing a lot of Hydrogen.You end up with the same Gallium as you started but the Aluminum is converted to Alumina.So careful with that glue using it to bond AluminumGallium has a very low melting point (29.77C), so on a hot day all your components will fall off, the Gallium will be in a liquid state and get to your Aluminum casing, Humidity will start reacting with the Aluminum, Hydrogen will be released and BANG!

author: Brumby
author_rank: Unknown
timestamp: January 12, 2016, 05:25:49 am
content: 29.77ºC would be a warm day for Aussies. Hot starts at around the 34 - 35ºC mark.

author: miguelvp
author_rank: Super Contributor
timestamp: January 12, 2016, 05:33:17 am
content: Sorry I should have said Joking, I bet their compound doesn't melt at that temperature

author: Brumby
author_rank: Unknown
timestamp: January 12, 2016, 05:38:46 am
content: One would hope not.(but it was a funny thought)

author: DimitriP
author_rank: Super Contributor
timestamp: January 12, 2016, 07:21:24 am
content: Quote(bolded the relevant parts)Metallic glue if it works "as advertised" sounds great. I didn't really need the extra "convincing".When they lay it thick like this though, it gets annoying
Entry phone hack - fun weekend project - Page 1
Forum section: electronics / general

author: silent
author_rank: Contributor
timestamp: October 05, 2015, 05:09:36 pm
content: Hi.I'd like to show you my quick, weekend hack - an automated analog entry phone with some useless features.Full description:http://silent.org.pl/home/2015/10/04/entry-phone-hack/.Made for fun ;-).

author: Halcyon
author_rank: Unknown
timestamp: October 06, 2015, 08:05:04 am
content: Although did your neighbours think you were a bit suss hanging out at the front door for long periods?

author: Delta
author_rank: Super Contributor
timestamp: October 06, 2015, 12:38:40 pm
content: Superb work! I love projects with a serious point, and then absolutely pointless features! 😀

author: manu
author_rank: Regular Contributor
timestamp: January 15, 2016, 10:46:48 am
content: Best hack ever!
'Space Travel' cigarette cards from the 1950's - Page 1
Forum section: electronics / general

author: WV1800es
author_rank: Contributor
timestamp: January 11, 2016, 04:43:59 pm
content: Here's a couple of links to the a blog post and the original card scans. Amazing what imagination can do!http://www.ecnmag.com/2016/01/future-space-told-1959-cigarette-cards?et_cid=5049836&et_rid=565876391&type=ctaand the original card archive:http://digitalcollections.nypl.org/collections/cigarette-cards#/?tab=navigation&roots=1120:54511680-c570-012f-d848-58d385a7bc34Hope you enjoy the futuristic nostalgia!
Teardown: DNA Microarray Scanner - Axon Instruments GenePix 4000B - Page 1
Forum section: electronics / general

author: PA0PBZ
author_rank: Super Contributor
timestamp: January 11, 2016, 02:47:10 pm
content: https://www.eevblog.com/forum/other-blog-specific/$24-000-dna-microarray-scanner-teardown/
Hall sensor question - Page 1
Forum section: electronics / general

author: magnetman12003
author_rank: Contributor
timestamp: January 10, 2016, 10:51:07 pm
content: I bought a Allegro SS441R BI POLAR hall sensor. Which of the three legs coming out of it connects directly to the ""POSITIVE"" power supply terminal ? One leg is the Supply VCC leg . One leg is the output leg. The other leg is the ground or negative leg. Need to know if the supply or output connects directly to the positive terminal.Your help appreciated.

author: MarkF
author_rank: Super Contributor
timestamp: January 10, 2016, 11:24:50 pm
content: From the datasheet:

author: magnetman12003
author_rank: Contributor
timestamp: January 11, 2016, 01:22:08 am
content: Quote from: MarkF on January 10, 2016, 11:24:50 pmThanks, That's the information I overlooked on the data sheet. Now I can build without blowing a sensor.
IC Die Photographs - Page 1
Forum section: electronics / general

author: AlxDroidDev
author_rank: Frequent Contributor
timestamp: January 08, 2016, 05:46:33 pm
content: Found these 3 sites today and thought it would be interesting to share with you. All of them feature closeup shots of decapped IC dies.It's some times quite laborious to take such pics, including acquiring and decapping the chip, not to mention that it requires a good macro lens (or a microscope) and camera, plus good lighting.Ic Die Photography:http://diephotos.blogspot.co.uk/ZeptoBars:http://zeptobars.ru/en/CPU-World:http://www.cpu-world.com/info/die_pictures.htmlThis is a photo of a UA741 from ZeptoBars (listed above):

author: free_electron
author_rank: Super Contributor
timestamp: January 08, 2016, 08:02:23 pm
content: what's wrong with that logo on the die ? fake ?www.siliconzoo.org/

author: ion
author_rank: Regular Contributor
timestamp: January 10, 2016, 10:48:41 am
content: I don't know, but other than the clipped corner near the trace, it looks just like the logo on this IC. And I am fairly certain this is genuine.

author: owiecc
author_rank: Frequent Contributor
timestamp: January 10, 2016, 10:53:12 am
content: Photos plusreverse engineeringof 7805 voltage regulator. Engineering porn at its best.http://www.righto.com/2014/09/reverse-engineering-counterfeit-7805.html

author: wraper
author_rank: Unknown
timestamp: January 10, 2016, 11:19:27 am
content: Quote from: free_electron on January 08, 2016, 08:02:23 pmNo, it's nothttp://zeptobars.ru/en/read/ST-UA741-opamp-operational-amplifier
Electrocution - May Not Be OK For Young Players - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: January 09, 2016, 10:00:28 am
content: The following link was posted on another website, it provides a good demonstration of the dangers of high voltage electricity.https://hamgear.wordpress.com/tag/electrocution/After shouting OUCH!! I suspect that all of us will be taking a little more care when servicing HV circuits.

author: amyk
author_rank: Super Contributor
timestamp: January 09, 2016, 06:15:13 pm
content: Quote152kW? That's like transmission-line level power. 240VAC mains looks absolutely weak in comparison.DC is what causes those horrible wounds due to electrolysis. With AC it would just be a severe burn, which is still bad but not quite the same.
Silver bearing solder for everyday use? - Page 1
Forum section: electronics / general

author: macboy
author_rank: Super Contributor
timestamp: January 08, 2016, 04:54:55 pm
content: I scored a deal ($5) on a half-used roll of nice Kester silver bearing solder recently: 245 flux core, Sn62Pb36Ag2, 0.020". My usual go-to solder is Kester 44, 60/40, 0.031". I love that stuff, the action of the 44 flux is great, soldering easily even to moderately corroded stuff, and it spreads like crazy so it tins tips better than anything else that I've tried (one touch can often tin the entire tip). The 44 flux is technically RA, but it is also no-clean if you wish. Really a great all-around product. My ancient one pound roll that I bought as a youngster is getting low. I also prefer a finer solder than 0.031" for SMD work. I really like the 0.020" size, it is just small enough for most SMD work but big enough to be usable for most jobs without having to feed it at a crazy rate.Compared to 60/40, the 62/36/2 alloy melts just a little lower but is plastic just a little longer. The 62/36/2 does producestrikingly beautifulshiny joints. I thought that the 60/40 made nice shiny joints, but this stuff is a step up - the joints are brightcolorlesssilver, without the slightly grey color of normal solder. You might not even notice the grey quality of normal solder until you see it next to silver solder. Kester claims 245 is no-clean, and "comparable" action to RMA flux; 44 is a more aggressive RA and is effectively no-clean (essentially it has been proven over the years to be OK to leave behind). The 62/36/2 has slightly better conductivity and is quite obviously stronger/less ductile. I'm not quite convinced about the mild 245 flux. It doesn't tin the iron tip quite as easily, but it the hot silver alloy does oxidize less quickly, which is a bonus.Is there any reason at all to not use this silver bearing solder for general purpose work? Will it eat my tips? What about the Kester 245 flux? I was thinking the alloy itself is fine/great and I would use this solder so long as the mild 245 flux is up to the task.

author: tautech
author_rank: Super Contributor
timestamp: January 08, 2016, 11:59:52 pm
content: Quote from: macboy on January 08, 2016, 04:54:55 pmNone at all IMO, Ag alloyed solders are premium products, enjoy.
Podcasts about electronics, or science in general, in DUTCH? - Page 1
Forum section: electronics / general

author: gildasd
author_rank: Frequent Contributor
timestamp: January 07, 2016, 05:51:42 pm
content: I want to improve my Dutch by active listening, but I'm having trouble finding podcasts of note in this fine tongue.Any worthwhile recommendations? So far the only radio I've found where people speak consistently over long periods of time is radio Maria.Being deaf is a good option to Radio Maria...Help most appreciated.G.

author: rqsall
author_rank: Regular Contributor
timestamp: January 07, 2016, 10:25:36 pm
content: Not electronics or science, but just regular news:www.bnr.nl

author: CrashO
author_rank: Unknown
timestamp: January 07, 2016, 10:40:27 pm
content: Not a podcast, but might still be usable for you (or just rip them to mp3..). The youtube channel "Universiteit van Nederland"There is a lot of interesting talks on there from professors. A lot of science related, but also from social and economical courses.Might be a good tool in learning Dutch, because they have a lot of different accentshttps://www.youtube.com/user/UniversiteitvanNL/playlistsA few of them:https://youtu.be/4kQFUcVlpi0https://youtu.be/h7m-mKOkB8A

author: Galenbo
author_rank: Super Contributor
timestamp: January 08, 2016, 07:40:05 am
content: I'm not aware of anything electronics/science/tech related thing in dutch.But there's a consumer electronics channel on youtube: HardwareInfoTvQuote from: gildasd on January 07, 2016, 05:51:42 pmRadio 1 is known for a lot of talk, mostly news/propaganda/human intrest.

author: gildasd
author_rank: Frequent Contributor
timestamp: January 08, 2016, 08:19:30 pm
content: Quote from: Galenbo on January 08, 2016, 07:40:05 amI listen to Radio1 and Studio Brussels, but the stuff on there never is of sufficient interest to make me make an extra effort.So far, I've learnt more Dutch with Jeroom (HUMO cartoonist) than any other source...http://www.humo.be/jeroom

author: gildasd
author_rank: Frequent Contributor
timestamp: January 08, 2016, 08:22:54 pm
content: Quote from: CrashO on January 07, 2016, 10:40:27 pmBedankt!
MELF in a blanket? - Page 1
Forum section: electronics / general

author: orion242
author_rank: Unknown
timestamp: January 08, 2016, 07:36:42 pm
content: Nothing more than curiosity...something I haven't seen before.Any idea why the heck they wrapped this guy up in a blanket? I assume its just shielding because the black thing is an inductor which is part of a switch mode supply.

author: MT
author_rank: Super Contributor
timestamp: January 08, 2016, 07:38:21 pm
content: A Pi/T filter.

author: orion242
author_rank: Unknown
timestamp: January 08, 2016, 07:51:27 pm
content: Ahh...So that's not shielding, its actually a lead on the device.
serious WTF?? moment... ADDTEK AMC7660DM.. - Page 1
Forum section: electronics / general

author: rob77
author_rank: Super Contributor
timestamp: January 07, 2016, 11:50:23 pm
content: some manufacturers apparently suffer from lack of creativity... otherwise i can't explain the existence of AMC7660DM IC made by Addtek some years ago (the company seems to be nonexistent at this time - at least they domain is for sale).while scavenging some parts from old electronics i'm going to throw away i met this strange IC - it was part of a buck converter in a small ethernet switch - topology of the circuit (by looking at the PCB) was clearly a standard buck converter - capacitor , inductor, diode, mosfet in SOI8 package and a driver chip in soi8 as well with a marking 7660 on it... but wait... how on earth a 7660 charge pump could drive a buck converter ?that's not possible, so started to reverse engineer the circuit - in few seconds it was clear it's not a 7660 charge pump IC - it must a be a "different" 7660fortunately the marking was a 7660DM and i found the datasheet in no time - and really, this "other" 7660 is a DC-DC converter IC.... ok.. so the manufacturer picked a number already taken by other chip many years ago...but looking at the datasheet closer.... WTF? it's a re-badged MC34063 !even the block diagram of the IC internals and schematics are mirrored in the datasheet (right to left) compared to original 34063 datasheet... probably trying to hide the origin ?here is the link to the datasheet:http://pdf1.alldatasheet.com/datasheet-pdf/view/202804/ADDTEK/AMC7660DMF.html
(RFI) Want to eliminate more RFI+audio noise from PC for swl, any tips? - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: January 07, 2016, 07:30:58 pm
content: Edit: This is much improved now- (a driver reset and setting the SDR software to use the full 24 bits of the on-board Realtek card helped a great deal)I recently bought a "sound card" style SDR, hoping to be able to leverage my PC's onboard Realtek sound card to get better HF reception, but found that digital modes reception is like a magnifying glass for noise of all kinds in my environment.I get the feeling a lot could still be done to quiet both the RF aspect of the PC as well as reduce the noise in the audio. But I've already tried to do as much as the hardware I have (a fairly cheap case) supports.Using approximately 1 mm thick copper wire now with crimped blade style connectors on the ends to strap computer and SDR and (temporary external 16 bit 48 Khz) sound card case has helped.I've removed the paint - and added lock washers, from points where metal screws needed to touch metal around the PC case. It came with those areas painted which was bad news for RFI.The onboard sound card uses a Realtek ALC889 codec, and all the audio plugs (like pretty much all consumer PCs) are unbalanced. The sound card SDR uses a regular stereo miniplug for output. The typical consumer grade audio cable it seems has around half an ohm of residual resistance between the ring shield connections on each end. Cleaning everything with alcohol seemed to help a bit.Edit: connecting computer and external SDR together with thick copper wire, in addition to the audio cable helped a bit too.
32mb mmc card - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 07, 2016, 02:05:28 am
content: i have a 32mb mmc card here anybody know of anything i could use it for it feels like a waste to just chuck it out

author: Refrigerator
author_rank: Super Contributor
timestamp: January 07, 2016, 07:00:56 am
content: Quote from: sony mavica on January 07, 2016, 02:05:28 amGo back in time a couple years and sell it for big bucks.

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 07, 2016, 07:24:37 am
content: Quote from: wilfred on January 07, 2016, 07:20:28 amhttp://jimcollyer.com/wp-content/uploads/2013/03/xx3.png

author: Halcyon
author_rank: Unknown
timestamp: January 07, 2016, 08:45:38 am
content: I have a 4 or 8 Megabyte SmartMedia card kicking around in my memory card box.Those wafer thin cards impress me even today.https://en.wikipedia.org/wiki/SmartMedia

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 07, 2016, 10:52:06 am
content: Quote from: Halcyon on January 07, 2016, 08:45:38 ami have a 16mb one sitting on my desk right now they really are thin just as thin as a credit card or maybe even thinner

author: amyk
author_rank: Super Contributor
timestamp: January 07, 2016, 11:32:50 am
content: That capacity sounds like it will be small-block SLC flash, which is going to be far more reliable in terms of endurance and retention than the newer stuff.

author: sleemanj
author_rank: Super Contributor
timestamp: January 07, 2016, 03:05:50 pm
content: Use it as a data logging card on some future microcontroller project.

author: Godzil
author_rank: Frequent Contributor
timestamp: January 07, 2016, 03:57:44 pm
content: Use it for a small MCU to install Linux on it!You could fit an embedded Linux in less than 4MB so there is still plenty of space for your software!

author: Fraser
author_rank: Super Contributor
timestamp: January 07, 2016, 05:29:43 pm
content: It is sensible to keep a reasonable selection of obsolete flash memory cards. I have needed such on several occasions to replace failed cards found inside expensive equipment. Such equipment was fussy about memory card technology and capacity. There is equipment that will only work with small capacity MMC cards. I even bought a handful of new ones last year for this very reason. One of my Advantest Spectrum Analyzer models uses a 16MB CF card formatted in FAT12 for the firmware. It will not work with any CF card of different FAT or larger than 32MB. I tried many 'tricks' to attempt to fool it. No dice. It was even fussy about brand and needed to be setup as a bootable CF disk drive, rather than just flash memory.Fraser

author: Godzil
author_rank: Frequent Contributor
timestamp: January 07, 2016, 07:05:44 pm
content: Also, especially MMC/SD they could be used to check if the reading/writing code is working correctly, there are so many problem with the SD/MMC that the more card you have the more reliable you code will be
Lemmium' new name for Heavy Metal in the Periodic Table! - Page 1
Forum section: electronics / general

author: MT
author_rank: Super Contributor
timestamp: January 07, 2016, 01:02:41 pm
content: https://www.change.org/p/support-lemmy-tribute-name-newly-discovered-heavy-metal-lemmiumhttp://www.theregister.co.uk/2016/01/06/heavy_metal_lemmium/Hohum, well....hrmm..

author: TechItApart
author_rank: Contributor
timestamp: January 07, 2016, 02:52:35 pm
content: Haha such a joke of a petition... Let's just ignore years of work by the Japanese scientists who don't yet have their own element and name it after some rocker who barely anyone knew about until his death, such a great idea. Apparently he didn't even like his music being called "heavy metal" as well.
Windows 10 Security, (again) - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: December 23, 2015, 01:22:45 am
content: I know this has been beaten to death lately but I ran across this leo laporte video.Nothing new just interesting to hear him talk about it.Here is the link to TrueCrypt.https://www.grc.com/misc/truecrypt/truecrypt.htm

author: saturation
author_rank: Super Contributor
timestamp: January 07, 2016, 06:44:03 pm
content: For Win10, you are better off with its successor, veracrypt, to minimize unforseen incompatibilities:https://en.wikipedia.org/wiki/VeraCrypt#Trusted_Platform_ModuleIt took ~ a year to complete a trucrypt code audit and it appears veracrypt, while not audited, continues a similar spirit as the original trucrypt developers.Note, any software that updates itself, and worse Windows update which changes system level files, have effective administrative access, so this status quo has been around before Win10. If you use whole disk system level encryption, all files are visible to admin once the operating system is booted. You can re-encrypt files using file level encryption but that too has some 'holes'. There are many other issues.A bottom line is, Win10 security issues are more than just in Win10.
Merry Christmas - Page 1
Forum section: electronics / general

author: IconicPCB
author_rank: Super Contributor
timestamp: January 06, 2016, 12:45:53 pm
content: Merry Christmas to the Orthodox Christians

author: orbiter
author_rank: Frequent Contributor
timestamp: January 06, 2016, 12:49:40 pm
content: I'm guessing this post got stuck in the back of a server somewhere for two weeks, OR it's for Christmas 2016

author: PA0PBZ
author_rank: Super Contributor
timestamp: January 06, 2016, 01:12:00 pm
content: https://en.wikipedia.org/wiki/Christmas_in_Russia

author: SeanB
author_rank: Super Contributor
timestamp: January 06, 2016, 01:34:55 pm
content: Quote from: orbiter on January 06, 2016, 12:49:40 pmI guess not....https://en.wikipedia.org/wiki/January_6_%28Eastern_Orthodox_liturgics%29

author: orbiter
author_rank: Frequent Contributor
timestamp: January 06, 2016, 01:49:52 pm
content: Well I'm quite happy to stand corrected.

author: IconicPCB
author_rank: Super Contributor
timestamp: January 06, 2016, 11:18:49 pm
content: Not only Russians but a large number of Eastern Orthodox Christians right across Europe, Asia parts of Africa, North America.

author: TimFox
author_rank: Super Contributor
timestamp: January 06, 2016, 11:39:43 pm
content: Today in the Roman (Gregorian) calendar is January 6. That is Epiphany, the day when the wise men from the East appeared to visit the Christ Child. This is also known as the Twelfth Day of Christmas (as in the song or the Shakespeare play Twelfth Night).

author: fivefish
author_rank: Frequent Contributor
timestamp: January 06, 2016, 11:55:35 pm
content: The wise guys have arrived

author: IconicPCB
author_rank: Super Contributor
timestamp: January 07, 2016, 12:33:05 pm
content: Today in the Julian calendar ( see Julius Caesar see NASA apropos mean Julian day) is Christmas day.
EEVblog forum RSS feed forbidden? - Page 1
Forum section: electronics / general

author: mcinque
author_rank: Unknown
timestamp: March 28, 2014, 10:43:24 pm
content: https://www.eevblog.com/forum/.xml/?type=rssdoesn't work. Is this intentional or is just broken?

author: morcibacsi
author_rank: Regular Contributor
timestamp: January 07, 2016, 09:04:58 am
content: Sorry for resurrecting an old topic, I did not want to start another. Is it possible to enable/fix RSS for topics on the forum? Would be helpful.Thanks.
Cheap RJ45 Ports, Where?  - Page 1
Forum section: electronics / general

author: Dot
author_rank: Contributor
timestamp: January 07, 2016, 10:12:52 am
content: HiI hope that this is the suitable forum section to post this question.I'm looking for RJ45 ports that support data rates up to 1 Gbps with EMI shielding and other typical features (e.g. two LEDs). I searched on Digikey and Mouser, with a goal to choose the least priced component available, and I came to this part from Amphenol (P/N:RJE58-188-5441). On Mouser, It' priced at $3.38 for 1 piece and $2.59 for 250 pieces.I'm looking for the cheapest parts, so I would like to ask if you know about any low price components out there. Recommendations?Thanks

author: DimitriP
author_rank: Super Contributor
timestamp: January 07, 2016, 10:34:09 am
content: This is not an endorsment, just a search result for "cheap"buck-fifty eachhttp://www.alibaba.com/product-detail/High-Quality-Cat5e-Cat6-Cat7-RJ45_60376927456.html?spm=a2700.7724838.30.115.ZoKWrD
update for "Davecad" - Page 1
Forum section: electronics / general

author: grifftech
author_rank: Frequent Contributor
timestamp: January 07, 2016, 02:02:33 am
content: Davecad needs an update: LEDs should have a dot of the same colour next to them (black for a white LED).Line colour should be black.

author: Brumby
author_rank: Unknown
timestamp: January 07, 2016, 02:42:32 am
content: DaveCad tends to be monochrome - so enforcing a colour standard is likely to be problematic. Where LED colour is important, I suggest a series of mnemonics such as R, G, B, W, IR, UV...Now where have I seen something like that before?......

author: calexanian
author_rank: Super Contributor
timestamp: January 07, 2016, 03:28:02 am
content: Traditional DaveCad is either red or black on canary yellow.Anything else is not acceptable!

author: grifftech
author_rank: Frequent Contributor
timestamp: January 07, 2016, 03:42:26 am
content: Quote from: Brumby on January 07, 2016, 02:42:32 amI agree with you on thatQuote from: calexanian on January 07, 2016, 03:28:02 am
TEquipment.NET ROCKS - Page 1
Forum section: electronics / general

author: warnberg
author_rank: Contributor
timestamp: January 06, 2016, 09:21:41 pm
content: ordered a Rigol DG1022 yesterday, got an e-mail stating it would not ship until 3/9/2016.... went direct chat and asked, very helpful but indeed said yes it would be 3/9 as they were out of stock...DAYUM, so I told them to cancel my order.. not 30 minutes later got an e-mail, making other offers as well as stating they even contacted the manufacturer for a drop ship.. nothing... get up this morning, my Rigol DG1022 will be delivered tomorrow, they located one for me...VERY WELL DONE TEquipment.NET !!!
Thermal Camera wildlife tours in the UK - Page 1
Forum section: electronics / general

author: Fraser
author_rank: Super Contributor
timestamp: January 05, 2016, 07:31:51 pm
content: Just watching the BBC 'One Show'. They featured a young girl who loves wildlife but is unable to go out in sunshine without heavy protection due to an incurable skin sun sensitivity.In order to provide the girl with a wildlife safari, the One Show engaged the services of a Night Safari Wildlife tour operator. They were using a combination of FLIR Tau thermal camera (roof mounted on a PT head) and handheld Thermal and Active IR viewers. They used a Landrover Defender as the mobile platform. Very neat. I have both the thermal and IR cameras, plus PT mounts, to do the same on my wife's X-Trail 4x4. Now there's a fun little project.What a great idea. The little girl loved the safari and easily tracked several different animals including deer, foxes and a hedgehog.For children this is magical stuff. If you have children and a thermal camera, take them out to the country for a night safariActive IR viewers from Russia are pretty reasonably priced too. Alternatively a decent monochrome CCTV camera and IR flood lamp works well.Fraser

author: SeanB
author_rank: Super Contributor
timestamp: January 06, 2016, 01:48:06 pm
content: Was watching that last night, the Labs mining for moles in the garden right in view of the CCTV. They have been slowly reducing the population, though they actually have a preference for the Avocado fruit on the tree. Between them and the Vervet monkeys we might not get much ourselves to eat.