hybridfree/eevblog-posts huggingface dataset:
Types of Nuclear Radiation - Page 1
Forum section: electronics / general

author: Ampera
author_rank: Super Contributor
timestamp: June 11, 2019, 12:18:03 am
content: What about distributed radiation?

author: windsmurf
author_rank: Frequent Contributor
timestamp: June 11, 2019, 02:44:22 am
content: Quote from: Homer J Simpson on June 10, 2019, 09:34:46 pmThis is far more entertaining... and she's better looking too

author: Halcyon
author_rank: Unknown
timestamp: June 11, 2019, 08:05:46 am
content: Quote from: windsmurf on June 11, 2019, 02:44:22 amI dislike her choice of nail polish colour ;-)

author: TerraHertz
author_rank: Super Contributor
timestamp: June 11, 2019, 11:38:31 am
content: Chernobyl: Two Days in the Exclusion Zonehttp://www.wise-uranium.org/rup.html"Depleted uranium thus has the unusual property that it becomes more hazardous with time."https://www.nndc.bnl.gov/nudat2/http://www.angelfire.com/extreme4/kiddofspeed/

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 17, 2019, 10:19:36 am
content: Quote from: Halcyon on June 11, 2019, 08:05:46 amWell on her 1st day there, it WAS a sort-of sparkly 'Puce', but the radiation changed it to a'dead-body' sort of finger-tip blue. However, she did wear lead-lined panties & girdle !!

author: Lord of nothing
author_rank: Super Contributor
timestamp: June 17, 2019, 11:11:33 am
content: The NATO and there deathly Nuclear Weapon polute many Country who the star there illegal war.There are a lot of Youtube Video about the "Deadly Dust"!https://www.youtube.com/results?search_query=deadly+dust&page=&utm_source=opensearch
Using Hameg 208 Service Manual for Philips PM3302? - Page 1
Forum section: electronics / general

author: Pexy13
author_rank: Regular Contributor
timestamp: June 17, 2019, 07:37:54 am
content: Greetings!I recently bought a Philips PM3302 oscilloscope.When I tried to find the service manual I couldn't find it.But I found out that people were using a service manual of the Hameg 208 (even the guy I purchased mine from).Can I use the Hameg manual exactly like it is for philips or should it be more of a guidance?If you have real Philips manual or a link to it's site feel free to send it here.Thanks!
Zenith Chromacolor 1973 Color Console 4 Tube Hybrid Television - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: June 17, 2019, 10:19:13 pm
content: Easy to forget now what TV's were like.This is the stuff that was in the house when I was a kid.

author: KE5FX
author_rank: Super Contributor
timestamp: June 17, 2019, 11:34:56 pm
content: Interesting video, really unusual to see ICs a few inches away from vacuum tubes. It looks like the power transformer was left over from the all-tube era. Power consumption does seem worse than I'd have guessed, but it's in line with what's specified in the placard.The plastic-and-particle-board cabinet may be a cheesy forewarning of the decline of Western civilization, or whatever, but ultimately it has held up great over several decades. Evidently there was nothing wrong with the materials Zenith used, given that they've lasted this long.

author: james_s
author_rank: Super Contributor
timestamp: June 18, 2019, 12:35:49 am
content: That's neat, I'd love to find an old console TV like that to use at our cabin. It would complete the 1970s frozen in time effect of the place.
Probably the world's first repaired Huawei P30 pro - Page 1
Forum section: electronics / general

author: gamalot
author_rank: Super Contributor
timestamp: June 04, 2019, 03:41:47 pm
content: I never thought that I could fix those pads under a BGA chip like this.

author: wraper
author_rank: Unknown
timestamp: June 04, 2019, 03:49:38 pm
content: I've done it many times. But it's really annoying time waste.

author: MrMobodies
author_rank: Super Contributor
timestamp: June 05, 2019, 01:06:52 am
content: That's a bit quick for one to break down so soon after 2 months of release.Quote

author: gamalot
author_rank: Super Contributor
timestamp: June 16, 2019, 07:59:13 am
content: Quote from: 3roomlab on June 16, 2019, 07:30:50 amThe repairman is not in Shenzhen, he lives in Ningbo, a city close to Shanghai. Actually he is a boss, runs a repair shop, and also does some training business.https://www.google.com/maps/place/Ningbo,+Zhejiang,+China/@29.8694844,121.2917706,10z/data=!3m1!4b1!4m5!3m4!1s0x344d6354630858f7:0x948723f846ccf173!8m2!3d29.868336!4d121.54399

author: Warhawk
author_rank: Frequent Contributor
timestamp: June 16, 2019, 09:19:45 pm
content: Quote from: blueskull on June 16, 2019, 09:16:28 amThe Art and Science of Analog Circuit Design - Jim WilliamsChapter: The Importance of FixingI can confirm that I learned more from fixing problems than listening to others on how to fix a problem.(simply said)
confused regarding the names used for cables - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: June 14, 2019, 08:48:59 am
content: I am really confused regarding the names used for cables.I have to admit that having four SAS connections wired in a cable is weird for the common experience, but ... now I have a new doubt: is "mini-SAS QSFP" the same as "Mini SAS SFF-8088" ?Isn't SFF-8088 a better description for the cable? is the right cable?The manual of my equipment says "mini-SAS QSFP", and I don't know if I have to order a SFF-8088 cable or ... something different.And to make things even worse, I asked a seller, and he has just repliedQuotewhy the world must be so difficult ...

author: sokoloff
author_rank: Super Contributor
timestamp: June 14, 2019, 01:32:16 pm
content: Have a look here for some decent pics:http://www.techcable.com/qsfp-qsfp-cables/When I was buying cables to get my external SAS chassis cabled up to the server (all repurposed enterprise gear), it took me three shots before I got a working combo of HBA and cables. I think a lot of this gear is expected to be sold by enterprises sales folks in cheap, ill-fitting suits taking CIOs to ballgames to "discuss their enterprise storage and converged networking needs", so the documentation online isn't as clear as we've come to expect with other things.It took me three shots, because I made the initial mistake of thinking they were all probably the same, so I bought cable A, which was slightly wrong, so I got cable B, only to find it was right but that I wanted to go a different direction on the HBA card itself, resulting in cable C. Was still nickels on the dollar for what this stuff all originally cost and works great.

author: legacy
author_rank: Super Contributor
timestamp: June 14, 2019, 02:49:02 pm
content: each cable costs 70-90 euro ... if I have to "try" then I have to buy on Amazon, so I can send cables back if it's wrong.Anyway, if manuals were clear with cable-names ...

author: sokoloff
author_rank: Super Contributor
timestamp: June 14, 2019, 03:01:33 pm
content: Switzerland makes it tough. Over here, Ebay is thick with recycled enterprise gear and I was trying at $15-25 at a throw, at which point, I'm tossing them in a box labelled "random cables" rather than worrying about sending them back.

author: windsmurf
author_rank: Frequent Contributor
timestamp: June 14, 2019, 06:05:33 pm
content: Quote from: legacy on June 14, 2019, 02:49:02 pmSometimes its the right cable, but its coded wrong at the end.https://www.gigatechproducts.com/dual-coded-dac-solutions/
very weird PCI card with StrongARM CPU and ram - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: June 13, 2019, 08:31:26 pm
content: Searching on eBay, I have just foundthisboard.I haven't yet understood how it works, it looks weird but very interesting

author: wraper
author_rank: Unknown
timestamp: June 13, 2019, 08:36:30 pm
content: Isn't it just CPU card? Should plug into backplane PCB and you have a working computer.

author: Halcyon
author_rank: Unknown
timestamp: June 13, 2019, 08:44:40 pm
content: It looks like a single board computer module designed for backplanes/cluster servers. You can get them in all kinds of flavours, some even have full IO such as disk controllers, GPUs and other interfaces.

author: Original
author_rank: Contributor
timestamp: June 13, 2019, 08:46:54 pm
content: http://netwinder.osuosl.org/pub/netwinder/docs/intel/quicklist/eval-plat/sa110.pdf

author: legacy
author_rank: Super Contributor
timestamp: June 13, 2019, 08:51:42 pm
content: Quote from: wraper on June 13, 2019, 08:36:30 pmSo it cannot be used in a RISC workstation as "accelerating card".It's what I am trying to achieve.

author: Kleinstein
author_rank: Super Contributor
timestamp: June 13, 2019, 10:40:58 pm
content: Given the age of the card - there is not much acceleration possible for a reasonable modern PC. Even at that time (some 25 years back) the Strong Arm was still a little slower than the usual PC.Just read the description - it tells that it is an Intel developer board - so something to test / program the ARM CPU, likely in a PC.So chances are the computer on the card is a little like a Raspberry in slow motion, possibly without graphics.

author: ogden
author_rank: Super Contributor
timestamp: June 14, 2019, 12:28:21 am
content: Quote from: legacy on June 13, 2019, 08:51:42 pmMost likely answer could be "it depends", you have to investigate.Card (EBSA-285) supports PCI master and device mode:Quote

author: legacy
author_rank: Super Contributor
timestamp: June 14, 2019, 08:20:58 am
content: Quote from: Kleinstein on June 13, 2019, 10:40:58 pmWho did say"modern" computers?RISC workstations like HPPA are as old as that card.

author: legacy
author_rank: Super Contributor
timestamp: June 14, 2019, 08:57:32 am
content: Quote from: Kleinstein on June 13, 2019, 10:40:58 pmTwo days ago, someone in my team was thinking about hacking a Rendition Vérité V1000 or V2000 VGA card, because the chip is based on a single Mips-like CPU, accessing all the video memory, and this makes it easy to program a card using a microcode loaded at startup.But, looking at the x11-org driver ... it's very buggy and not well working, this even if people have been working on it for years. Anyway, just to tell you about the "crazy-cool" factor of the people in my team
Has anybody experienced with Mechatronics-System P1 Pick-and-Place - Page 1
Forum section: electronics / general

author: theparitt
author_rank: Newbie
timestamp: May 09, 2019, 02:06:52 pm
content: Hi everybody,I would like to buy a Pick-and-place for entry-level, small production. I found this machine from Germany, Mechatronic-System P1.http://mechatronic-systems.com/products/smt%20placer/P1_e.htmlcosts about 10,xxx Euro. The company's website seems not to update for years. I wonder does it worth to buy for the entry-level and capable to do 0201. There is another option that I also consider is Neoden V4 ( $8xxx).

author: Alicelllly2020
author_rank: Contributor
timestamp: June 14, 2019, 08:18:37 am
content: Hi theparitt,Greetings, this is Alice from Neoden, we are a professional manufacturer of SMT machine since 2010.Glad to know you are interested in our Neoden 4, it supports 0201, this machine has great performance and stable system, which is an excellent choice for prototype and small size production.For more information, you could also contact me by:Email: sales4@neodentech.comMob/Whatsapp: +86-13588176839 / Skype: Alice_NeodenBest regards,Alice
Motorola ARNWESH SBC5204 Evaluation Board -- anyone has ever used it? - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: June 13, 2019, 02:59:01 pm
content: so, a dude in the US has just traded a couple of his boards for supply of good stuff.Unfortunately he doesn't have any documentation for the board, and Googling for it hasn't yet helped a lot.The boards is nothing special, it's a Coldifre V1 chip on a big board with two serial ports, but it also offers an ISA-8bit but and this is really an interesting thing for me

author: Benta
author_rank: Super Contributor
timestamp: June 13, 2019, 04:10:07 pm
content: https://www.nxp.com/docs/en/reference-manual/MCF5204EVALUM.pdfSpelling helps...

author: legacy
author_rank: Super Contributor
timestamp: June 13, 2019, 08:12:00 pm
content: I meant Google hasn't yet helped about programming examples, and about feedbacks from someone who used/still uses the board.I was expecting a couple of links in ... umm ... something on a Yahoo group? something in a dev forum? a post in a mailing list?
what other capacitor types should I get ? - Page 1
Forum section: electronics / general

author: lordvader88
author_rank: Frequent Contributor
timestamp: June 14, 2019, 08:09:46 pm
content: I'm not thinking of large electro. caps, I thinking for low noise, high speed, or precision.So far I have lots of assorted 50V ceramic caps, some tantalum's in the 100n-1u range, 50V or 100V. I have a bunch of assorted green Polyester caps that are under 100n, and 200-630V, for stuff like vacuum tubes or other HVwhat are the next type a hobbyist should keep around? What should I really have for RF projects when a ceramic is not recommended ?Some day I want some expensive mica caps, whats a cheaper accurate version cap these days ??
View my posts - Page 1
Forum section: electronics / general

author: fixit7
author_rank: Regular Contributor
timestamp: June 13, 2019, 12:49:49 am
content: I can figure out how to see my posts.That is one reason why I sometimes post twice on the same subject.Thanks.

author: tautech
author_rank: Super Contributor
timestamp: June 13, 2019, 12:53:18 am
content: Profile> Show Posts.Or Profile> hover over Profile Info> Posts/Topics/Attachments etc.

author: fixit7
author_rank: Regular Contributor
timestamp: June 13, 2019, 01:14:46 am
content: Under profile, I seeSummaryAccount settingsForum profileMentions

author: mariush
author_rank: Super Contributor
timestamp: June 13, 2019, 01:20:41 am
content: Hover on profile , hit Summary, then Show postsor bookmark this url :https://www.eevblog.com/forum/profile/?area=showposts;u=503931

author: Psi
author_rank: Super Contributor
timestamp: June 13, 2019, 01:21:41 am
content: Click on your name top left in any of your posts.<------ etc, here's mineThat will take you to this screen below.Then click on show posts.

author: fixit7
author_rank: Regular Contributor
timestamp: June 13, 2019, 01:31:58 am
content: Thanks guys.

author: soldar
author_rank: Super Contributor
timestamp: June 13, 2019, 04:53:01 am
content: https://www.eevblog.com/forum/profile/?area=showposts;u=503931
Spot the difference - Page 1
Forum section: electronics / general

author: gamalot
author_rank: Super Contributor
timestamp: June 12, 2019, 06:38:13 am
content: I had ordered some components fro DigiKey last weekend, and they had been delivered by UPS this afternoon. When I checked them, there was a small evaluation board that really shocked me.I took a picture of the board and found another one from the Internet. Can you see the difference?

author: gamalot
author_rank: Super Contributor
timestamp: June 12, 2019, 06:40:31 am
content: The board is a TE Connectivity's DPP903M000https://www.digikey.com.au/product-detail/en/te-connectivity-measurement-specialties/DPP903M000/223-1787-ND/6685753

author: Towger
author_rank: Super Contributor
timestamp: June 12, 2019, 06:48:50 am
content: U2 (MS8607?) and C2 are missing and a different pin header.

author: Towger
author_rank: Super Contributor
timestamp: June 12, 2019, 07:21:14 am
content: I thought photo 2 was the problem one! Digikey must be learning from the cheapest Arduino clone sellers on eBay, who sell everything and anything they can pickup cheap at the local markets.

author: HwAoRrDk
author_rank: Super Contributor
timestamp: June 12, 2019, 03:47:54 pm
content: Wow. Do they have random interns soldering these up by hand or something?Also, where there are supposed to be resistors, 10K versus 1K.

author: Arjunan M R
author_rank: Regular Contributor
timestamp: June 12, 2019, 03:50:33 pm
content: Quote from: 3roomlab on June 12, 2019, 07:06:58 am

author: Arjunan M R
author_rank: Regular Contributor
timestamp: June 12, 2019, 04:01:59 pm
content: There is a significant difference in the board quality.Look at the vias .Even they didn't tent the vias the solder mask is over them.
Tracing underground pipes with AM radio - Page 1
Forum section: electronics / general

author: Circlotron
author_rank: Super Contributor
timestamp: June 11, 2019, 01:16:04 am
content: Read the following and wanted to know if anyone here has tried it out?Quote

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 11, 2019, 02:26:39 am
content: It would be far more effective if a low powered AM transmitter is connected to the pipe.

author: Circlotron
author_rank: Super Contributor
timestamp: June 11, 2019, 02:38:36 am
content: Quote from: NiHaoMike on June 11, 2019, 02:26:39 amBut then you wouldn't get the sharp null directly over the pipe, would you?

author: ptricks
author_rank: Frequent Contributor
timestamp: June 11, 2019, 12:57:16 pm
content: I haven't done it with pipe but I did with trace a wire that went to a light in the yard. I connected a signal generator to the end of the wire from the house and then walked out in the yard and found the location of the wire and where the signal stopped , there was the break.Not sure how a pipe will work because of the pipe being grounded , the wire of course was insulated.I used a portable radio (walkman) as the detector.

author: tautech
author_rank: Super Contributor
timestamp: June 12, 2019, 09:31:53 am
content: Only need a length of wirehttps://www.eevblog.com/forum/chat/scientist-finds-uk-water-companies-use-_magic_-to-find-leaks/
Looking for documentation - Dick Smith's SE3002 Bluetooth Handset - Page 1
Forum section: electronics / general

author: Deodand2014
author_rank: Regular Contributor
timestamp: June 13, 2019, 06:57:46 am
content: As the title says I'm looking for any documentation on this handset, i picked one up at a local flee market and have no idea on how to tell if it's charged or not, how to set up pairing or even how the handset shows up when bluetooth is enabled on your mobile phone.If anyone can help I would be very happy.

author: wilfred
author_rank: Super Contributor
timestamp: June 13, 2019, 07:48:25 am
content: Try a generic search on "retro bluetooth handset" and see if you find something similar. They are not all that different. Here are two I found.https://www.thinkgeek.com/files/bluetooth-handset-instructions.pdfhttps://fccid.io/Y56BK011/User-Manual/User-Manual-1584240

author: Muttley Snickers
author_rank: Unknown
timestamp: June 13, 2019, 07:51:16 am
content: I haven't had a proper look around and assume your handset is something like the one in the video below. As wilfred said, more than likely it will be branded or labelled under another name or model as well so it's just a matter of searching for information.

author: Deodand2014
author_rank: Regular Contributor
timestamp: June 13, 2019, 09:04:02 am
content: Thanks for the suggestions, unfortunately mine does not have the silver button

author: wilfred
author_rank: Super Contributor
timestamp: June 13, 2019, 09:21:52 am
content: The blue button between the volume up/down buttons is probably the equivalent button.The electronics are most likely some chip makers reference design in a different box.I had a look for my instructions but they are not surprisingly nowhere to be found.
Recommended seller of Quick 861DW for Australians - Page 1
Forum section: electronics / general

author: rossv
author_rank: Contributor
timestamp: June 10, 2019, 06:43:28 am
content: Hi,I want to buy a Quick 861DW but I'm in Australia, where this product can't be bought locally.Is there anyone in Australia who has bought one that can share where they bought it from?Trying to avoid the stress of receiving a fake from a dodgy sellerThanks

author: beanflying
author_rank: Super Contributor
timestamp: June 10, 2019, 07:01:04 am
content: The short answer is NO ONE. Because of this brand being ratbagged all over Bangood, Aliexpress and Evilbay no one in Oz will stock it. Best idea is Aliexpress as at least you can look at item specific feedback and when needed I have found there refund policy to be good. Either that or take a punt on evilbay with paypal as a backstop.I have been happy with my Hanba 968A+ if you want to look at an alternate option. It runs a very similar hot air end to the quick and you get a soldering iron. Seems there is no longer any local sellers of that item too.

author: rossv
author_rank: Contributor
timestamp: June 11, 2019, 08:23:01 am
content: Hi,Thanks for the advice, I suppose I'll take a look at Aliexpress then. I also note that Louis Rossmann sells them, but I don't fancy paying massive shipping costs to get the unit from the USA.
Nuclear fuel reprocessing and the technology/machines that separate it (In Depth - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: June 06, 2019, 05:52:12 pm
content: What is surprising is that some of these are prototypes and it makes you wonder what they are doing with all these elements, some very useful. 50 years ago waste that was a 1000 year problem and dumped in the ocean is now very valuable fuel. It's foolish to think that we won't come up with ways to economically transmute or find uses for these substances. Also foolish to store on site in dry casks with no long term plan. Tons of energy remains in that waste.https://youtu.be/TaC2pvDMPc0

author: Beamin
author_rank: Super Contributor
timestamp: June 06, 2019, 06:07:11 pm
content: For those who watched this at 53:00 when he says "doubling the distribution coefficient equals not double the output but 2/3 more" is that just simple math in the ratios or is there more to it then that?

author: David Hess
author_rank: Super Contributor
timestamp: June 08, 2019, 12:09:30 pm
content: Quote from: Beamin on June 06, 2019, 06:07:11 pmI think that is just the math when dealing with solutions in equilibrium. There is a logarithmic graph at 54:09 which shows the relationship to distribution coefficient.I recall doing this in quantitative analysis with that logarithmic relationship.At 1:02:00 he says, "The phase ratio is the logarithm of the distribution coefficient." So there is where the 2/3rds relationship comes from.

author: Beamin
author_rank: Super Contributor
timestamp: June 10, 2019, 08:07:09 pm
content: Quote from: David Hess on June 08, 2019, 12:09:30 pm
Tesla battery modified for project - fire - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: June 10, 2019, 05:11:38 pm
content: This might need a Darwin Award.

author: Cyberdragon
author_rank: Super Contributor
timestamp: June 10, 2019, 06:24:30 pm
content: Erm, that's real old news now, been posted before. Where have you been?

author: SparkyFX
author_rank: Frequent Contributor
timestamp: June 10, 2019, 06:27:21 pm
content: Can happen quick:https://youtu.be/tBg4ximDrsk?t=966

author: chris_leyson
author_rank: Super Contributor
timestamp: June 10, 2019, 06:36:43 pm
content: "Where is my explosion containment pie dish"
I had SO much to do today!!! but...... - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 11, 2019, 12:48:33 pm
content: Missus demanded Alarm set for 7:30am... (Still half dark!!!!)Grandchild delivered by working parents, to get to school by 9:00am.Misses demanded that I finish work on a Plaque for her deceased father, in a neighboring town.Had cereal with Yogurt first, in bed. Took 12 Tablets. Reminded her to take hers !!!!!!Heavy rain & storms all night, continuing into the morning.... re-prioritizing... getting in trouble...TV morning shows in bed, for 'education'. Looked outside & got depressed, but finished the Plaque!!!Went on the Internet, but was worried about negative Forum posts, so didn't look !!! hahahaThought about abusing/edumercating 'Flat-Earthers', but realized the futility of that......Mentally 'designed' a new system to keep the wind-blown rain out of the Pergola area, with parts needed.But then I found a "To-Do" list !!!! on my computer (shown below)....So, TOMORROW my 1st 'job' is going to be to "Fill-In" the missingfullstopon Line-10 above !!!!!Heaven knows where my exciting life will head, after that !!!!!!

author: Circlotron
author_rank: Super Contributor
timestamp: June 11, 2019, 12:56:36 pm
content: ^^ Life in the fast lane!
Anti-static brush for electronics - Page 1
Forum section: electronics / general

author: nForce
author_rank: Frequent Contributor
timestamp: June 08, 2019, 08:24:16 pm
content: Is this brush really antistatic:https://hobbyking.com/en_us/static-control-crank-handle-brush-small.html?I don't want to damage my $400 video card and other electronic parts.

author: mcinque
author_rank: Unknown
timestamp: June 09, 2019, 02:12:11 pm
content: For that cost, I doubt it.However, an antistatic brush does not generate static electricity (tipically a natural goat brush is ok), while that seems a fake of adissipativebrush, that AFAIK rely on the operator's grounding.Depending on what you need to do (brushing and cleaning with IPA or simply dust removing), you should choose the proper model.

author: ogden
author_rank: Super Contributor
timestamp: June 09, 2019, 02:22:48 pm
content: Quote from: nForce on June 08, 2019, 08:24:16 pmFarnell have broad range of ESD tools in stock. One brush that look similar to yours:https://uk.farnell.com/duratool/d03138/static-brush-180mm-plastic/dp/2543021
good value room air purifier hepa etc? - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: June 09, 2019, 01:57:44 am
content: What is a good air filter to use for a living space (i.e. living room). I like the tower shaped ones (my current one met the reaper man), and it was being a noisy bastard since 2004,What is a good brand to look at?Looking to get a few units, one to keep dust down in my lab.

author: coppercone2
author_rank: Super Contributor
timestamp: June 09, 2019, 02:01:21 am
content: a requirement is that the electronics package must be accessible through normal methods with screws without like insane stuff (this bionaire that met its end had a fucking metal mesh bend over the panel that had the screw heads) so none to say the autopsy was quite gruesome.if it was possible to disassemble without panel beating afterwards I would have tried to revive it.

author: coppercone2
author_rank: Super Contributor
timestamp: June 09, 2019, 02:10:39 am
content: with this shady power supply I begin to feel like it was me or him
optical fibre cables - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: June 07, 2019, 04:24:03 pm
content: I am a bit confused at the moment. The datasheet of my optical transreceiver says I need a 62.5um multimode cable with an LC connector, while the HBA needs a 62.5um Multimode SC Duplex Cable, so I need to buy a "LC to SC 62.5um patch".What makes me confused is the offers I find on Amazon. Some say 62/125um (e.g. 3M P/N GCFA1CLM03-M), and it's ok, but some say 50um ... so

author: jc101
author_rank: Frequent Contributor
timestamp: June 07, 2019, 05:37:08 pm
content: For multimode fibre the older standard is 62.5/125 in size with more modern standards based on 50/125. Does anything mention OM1, OM2, OM3 or OM4 as that defines the spec?For 99% of kit a 50/125 will work fine in place of a 62.5/125 cable. You will probably find way more 50/125 available these days.For the various types see herehttps://en.wikipedia.org/wiki/Multi-mode_optical_fiberI'd just get an OM3 or OM4 patch lead with the connectors you mention and all should be fine.

author: legacy
author_rank: Super Contributor
timestamp: June 08, 2019, 10:49:27 am
content: thanks for your hintsQuote from: jc101 on June 07, 2019, 05:37:08 pmunfortunately no. I have just checked and found that- SC to LC are available with 62.5/125, rare but I can find some- SC to SC are available with 50/125, haven't yet found one with the 62.5/125 specSC to SC is for a different project and needs to link two QLA2xxxF HBA.I cannot see, in this case, what Qlogic recomends for the optical cable.

author: jc101
author_rank: Frequent Contributor
timestamp: June 08, 2019, 12:01:12 pm
content: I’d just get the 50/125 regardless. The generic term multi-mode is basically just all 50/125 these days.

author: legacy
author_rank: Super Contributor
timestamp: June 08, 2019, 12:06:42 pm
content: Ok, let's try it

author: legacy
author_rank: Super Contributor
timestamp: June 08, 2019, 01:26:57 pm
content: OK, I have just purchased a couple of patch cables, 50/125. Let's see if they will work.The manual of the HBA says only thisQuoteIt's completely unclear if the transceiver uses a LED or a LASER, etc, and there are no other recommendations for the optic cabling.Anyway I am 100% sure, this engine won't go faster than 10Gbs. It's not required, so OM1 "should" be OK.

author: madires
author_rank: Super Contributor
timestamp: June 08, 2019, 02:40:29 pm
content: 62.5µm multimode fiber is obsolete for quite a while. You can use 50µm MM if you don't need the maximum distance supported by the transceivers. Please seehttp://www.thefoa.org/tech/fib62-50.htmfor some info about losses involved.

author: legacy
author_rank: Super Contributor
timestamp: June 08, 2019, 04:48:08 pm
content: Yup, for my application, the cable's length is 50 meters.So 50um is OK!
Unior U620961 VS Wiha 26919 - Page 1
Forum section: electronics / general

author: Free_WiFi
author_rank: Regular Contributor
timestamp: June 07, 2019, 11:39:53 pm
content: Actually amazon.it is giving me the possibility to buy any stuff at €5.00 of discount.So i'm thinking what to pick over these items:https://www.amazon.it/gp/product/B00BOV6NRSorhttps://www.amazon.it/Wiha-26919-impugnatura-dissipative-elettrostatica/dp/B0012T9MJ8orhttps://www.amazon.it/dp/B078GB9JZCP.S I'm also not very sure about my final choose,because a lot of people around the net are blaming CR-V alloy for low resistence in the time for this kind of application.Instead a lot of people are talking very good about CV-Mo-72 from Wiha's screwdrivers set.At this point can you help me to make this situation clear ?Thanks you very much.

author: Monkeh
author_rank: Super Contributor
timestamp: June 07, 2019, 11:56:59 pm
content: Good grief, kid, they're screwdrivers, just buy a set already. They're not for life.

author: Free_WiFi
author_rank: Regular Contributor
timestamp: June 08, 2019, 12:09:32 am
content: Quote from: Monkeh on June 07, 2019, 11:56:59 pmLOLAre you forbidding me to know what other people are thinking about these brands?The problem is not to buy nor if they will rest for the entire life,the nutshell of the problem is that i'm completely new to Unior brand .......

author: shteii01
author_rank: Frequent Contributor
timestamp: June 08, 2019, 03:04:54 am
content: In US nobody heard of Unior.Wiha is spotty. I have their multi bit screwdriver (you store the bits in the hollow handle) and the bits are made in Vietnam. Already broke 3mm slot bit. On the other hand, I have a set of Wiha plus minus screwdrivers, they are great. So. I am very cautious when it comes to Wiha.

author: Free_WiFi
author_rank: Regular Contributor
timestamp: June 08, 2019, 03:18:57 am
content: Quote from: shteii01 on June 08, 2019, 03:04:54 amGedore does rebrand quite a bit of their tools,in fact gedore "outsourced" their electric screwdriver production from the slovenian Unior.Check this outhttps://www.germantoolreviews.com/gedore-171-165-06

author: shteii01
author_rank: Frequent Contributor
timestamp: June 08, 2019, 03:52:38 am
content: At least Slovenia is still in Europe.
If it *Ain't* turned on, then...... - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 05, 2019, 10:56:54 am
content: It always gets me these days, with the number of recent 'incursions' into secure systems.So many companies/departments have many permanently open 'lines' opened to their Routers.Accessed either with passwords, or brute-force attacks etc. I understand why this must be soat times, for say certain Universities & many departments/companies needing 24-hr access....I used to work as a Tech for a certain world-wide company, and virtually all my 'customer' baseinvolved many high security establishments, (including govt. depts), that did NOT need (and deliberatelydisabled!) 'constant' real-world access !! If I needed to 'remotely' connect, when not there in person,for diagnostics/faults/modifications etc, then LOCAL Security Personnel would be contacted by Phonefirst, identification & codewords (& more) given, and they would Physically turn on the Power to theRouters/Modems. A time frame was given, and re-contacted when finished!! Without re-contact, thepower was turned off again. As my Subject description said......If it *Ain't* turned on, then NO-ONE can access ANYTHING

author: Rerouter
author_rank: Super Contributor
timestamp: June 05, 2019, 11:47:10 am
content: 1. Design brief built involving carefully thought out segregation2. System Designer designs it secure and airdropped where possible3. Begins Construction, Local managers start poking and prodding for extra functionality that require things not be air gapped and begin pushing it up the chain4. HR and upper management read those things in half context, and want to have a nice dashboard that lets them see everything5. new hobbled design brief pushed down and some air gapped things end up plugged in for "convenience"6. IT finds out about the changes too late to stop them and has to fight the next few months / years to get things back closer to the original specEnds up being charged 5 times the original brief from inter-office politics.even found this in automotive incident cameras, you would not believe the level ears perk up at the thought of being able to pull a live stream of a driver they don't like to look for faults, despite said system being built specifically to only talk to a secure storage server and using a heavily locked down interface to pull after the fact clips by authorized users.. Every month a feature request pops up wanting the ability to start a real time video stream on any unit to a web dashboard and to share that stream by a link anyone can watch with no time or data constraints....

author: soldar
author_rank: Super Contributor
timestamp: June 05, 2019, 11:24:22 pm
content: I posted this story before.Quote from: soldar on May 07, 2019, 12:42:09 pm

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 07, 2019, 11:07:30 am
content: Quote from: Rerouter on June 05, 2019, 11:47:10 amO-K-A-A-Y.... I'll remember that next time I contemplate leaving a router/Modem turned on !!
Hal Laning: The Man You Didn’t Know Saved Apollo 11 - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: June 02, 2019, 08:32:55 am
content: Holy smokes, she's cuteInteresting video as well!

author: wilfred
author_rank: Super Contributor
timestamp: June 02, 2019, 09:46:44 am
content: Thanks Homer, another gem. You're way better than the YT algorithm.

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: June 02, 2019, 02:01:54 pm
content: First real time operating system. When in doubt always blame the software guy.

author: Homer J Simpson
author_rank: Super Contributor
timestamp: June 07, 2019, 12:13:12 am
content: Interview with Dr. Hal Laning at the Computer Museum 1996
BLDC motor - physical quantites - Page 1
Forum section: electronics / general

author: nForce
author_rank: Frequent Contributor
timestamp: June 02, 2019, 07:28:48 pm
content: Why does B (magnetic density) change like a square function in BLDC motor? And why does magnetic flux change like a ramp function, it goes up and then down and again up...?Why is B the derivative of magnetic flux, and where does magnetic field induce emf?Thanks.

author: nForce
author_rank: Frequent Contributor
timestamp: June 03, 2019, 05:44:22 pm
content: So no one knows what is the function of magnetic density (B) and magnetic flux in BLDC motor?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 04, 2019, 12:43:02 am
content: Square function of what?Flux a ramp function of what?What is the definition of B, anyway?I suspect, if you took a little more time to prepare your questions, you will find your answer in the process!It is a very useful technique. I've answered many of my own questions this way. All too often, answering them myselfafterhitting "Post" and only then thinking about what was missing... but my rate seems to be improving over time.Tim

author: mac.6
author_rank: Regular Contributor
timestamp: June 06, 2019, 01:13:33 pm
content: It's a whole field of physics:electromagnetism

author: ace1903
author_rank: Regular Contributor
timestamp: June 06, 2019, 01:44:36 pm
content: One experiment is worth whole book of theory.Make an experiment with real BLDC motor. Connect scope on one of the coil and turn rotor by hand drill.You will see induced emf in the coil and its form.Most book authors do copy paste from other books and forget to explain that ramp function is like design goal when designing BLDC motor.It is also simplification when doing mathematical model of BLDC motor.In practice ramp function it is impossible to get with normal shape of the magnet and iron pole.Many motors that I have used have sinusoidal form of induced EMF and technically they are same as pmsm motor.
Detailed (3hrs long) Video of how a nuclear reactor works - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: June 05, 2019, 03:55:32 am
content: An excellent explanation of how reactors work from the basics to barnes.https://youtu.be/2Hpq-rU92kw

author: Red Squirrel
author_rank: Super Contributor
timestamp: June 05, 2019, 01:13:59 pm
content: Cool I'll have to check that out when I have the time.

author: Beamin
author_rank: Super Contributor
timestamp: June 06, 2019, 11:15:02 pm
content: Quote from: Red Squirrel on June 05, 2019, 01:13:59 pmThere are other videos from that same poster with what seems to be some conference with the DOE in a hotel function room.Taking the Pu out of the spent fuel is very similar to how you get gold out of solution using SMB in aqua Regia, just a few more steps. If you take too much pu in solution of the right geometry you can have a criticality event as almost happened at Hanford or one of those sites with the terrible track record.
General motor control - Page 1
Forum section: electronics / general

author: nForce
author_rank: Frequent Contributor
timestamp: June 04, 2019, 08:08:24 pm
content: When controlling some motor (DC, AM, SM) if the rotor is spinning in the negative direction and we apply positive torque. Will then the rotor slow down and start spinning in a positive direction?And now if we have a positive torque, and the controller gets the reference value of negative speed. So now the torque goes from positive torque to negative?Thanks.

author: Sal Ammoniac
author_rank: Super Contributor
timestamp: June 04, 2019, 08:16:45 pm
content: Quote from: nForce on June 04, 2019, 08:08:24 pmIt depends on how much torque you apply. If you apply too little torque, the rotor will slow down, but continue rotating in the original direction. If you apply enough torque, you can reverse the direction of the rotor. You can also apply just enough torque to stop the rotor entirely. These statements assume, of course, that you're applying this external torque via the motor's shaft and the motor's speed is not being actively controlled. If that were the case, the controller will attempt to maintain the motor's speed and direction (within limits, of course).QuoteI don't know what you're asking here... If I'm interpreting you correctly, if the motor rotor is spinning in one direction, say, clockwise, and you tell the controller to set a negative (relative to the current direction of spin) speed, then yes, the motor will slow to a stop and start spinning in the opposite direction (assuming the load allows it to do so).
Is there a way to change your time zone on the forums? - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: December 01, 2018, 01:57:39 pm
content: I have searched my profile and calendars links to no avail. I think I'm stuck on Australia time which is upside down.

author: maukka
author_rank: Unknown
timestamp: December 01, 2018, 02:15:55 pm
content: Under look and layout there's "Time Offset".

author: Beamin
author_rank: Super Contributor
timestamp: December 01, 2018, 02:25:07 pm
content: HomeHelpSearchProfileAbout usMy MessagesCalendarLinksMembersLogoutEven when I hover the mouse over these options I don't see that I'm using MS Edge (I know I know, but its spell checker spares you guys from my horrible blind typing so thank Microsoft)

author: spiff72
author_rank: Regular Contributor
timestamp: June 03, 2019, 07:59:28 pm
content: I know that this is an old topic, but I found it using the search function. I am unable to see the settings shown in the previous post. All I have under that "Profile" item in the top menu are:- Summary- Account Setting- Forum Profile- MentionsI wanted to adjust the time zone, but spent 10 minutes in vain trying to figure out where I could adjust it.I only have 9 posts so far, but have been a member for several months. Could that be the issue?I also would like the ability to control the default notifications so I get email notices when I am replied to. I have used SMF before (used to run a forum many years ago), but I can't find settings to control this, either.

author: spiff72
author_rank: Regular Contributor
timestamp: June 03, 2019, 08:00:51 pm
content: Jeez - after posting this, I tried again and now I see it! I am all set!

author: bloguetronica
author_rank: Frequent Contributor
timestamp: June 04, 2019, 12:40:07 am
content: Australian time, and that's it. As long as the water doesn't go the other way when you flush, you are good.Kind regards, Samuel Lourenço

author: vk6zgo
author_rank: Super Contributor
timestamp: June 04, 2019, 06:12:57 am
content: Quote from: bloguetronica on June 04, 2019, 12:40:07 amAhh! but which Australian time?We can do you three in Winter, & four in Summer.
Cooling below room temperature without using energy - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: June 01, 2019, 09:48:06 am
content: Physicists at the University of Zurich have developed an amazingly simple device that allows heat to flow temporarily from a cold to a warm object without an external power supply. Intriguingly, the process initially appears to contradict the fundamental laws of physics.https://www.media.uzh.ch/en/Press-Releases/2019/Thermodynamic-Magic.html

author: OwO
author_rank: Super Contributor
timestamp: June 01, 2019, 05:35:56 pm
content: OK, so object is initially at 100*C. Peltier element is used to harvest electrical energy from it and charge a capacitor. Then the capacitor is discharged through peltier to cool the object below ambient. I can replicate this in my bedroom.

author: IanB
author_rank: Super Contributor
timestamp: June 01, 2019, 05:42:44 pm
content: It requires an external power supply to heat the object initially to 100°C. This is "fake news".

author: amyk
author_rank: Super Contributor
timestamp: June 01, 2019, 06:37:57 pm
content: About the same as claiming that discharging a can of air duster gives "free cooling"?

author: Gyro
author_rank: Super Contributor
timestamp: June 01, 2019, 06:43:53 pm
content: Time for a move to 'Dodgy Technology'.

author: magic
author_rank: Super Contributor
timestamp: June 01, 2019, 07:02:36 pm
content: If they got efficiency right, it would freeze freshly cooked meals without further energy input.And nope, they said something about superconductive inductors rather than capacitors - highly practical for now

author: soldar
author_rank: Super Contributor
timestamp: June 01, 2019, 07:14:16 pm
content: I often eat for free... by paying with my wife's credit card.

author: Brumby
author_rank: Unknown
timestamp: June 02, 2019, 03:47:32 am
content: Quote from: soldar on June 01, 2019, 07:14:16 pmThere's no such thing as a free lunch.You'll be paying for that - one way or another...!

author: thm_w
author_rank: Super Contributor
timestamp: June 03, 2019, 08:32:09 pm
content: Don't blame the researchers for whoever wrote that misleading article.. Paper:https://advances.sciencemag.org/content/5/4/eaat9953"Intriguingly, the process initially appears to contradict the fundamental laws of physics."Then right in the conclusion of the paper:"We have analyzed a corresponding oscillatory thermal process in detail, from both the electrical and thermodynamic points of view.While it fully complies with the second law of thermodynamics"Quote from: OwO on June 01, 2019, 05:35:56 pmInductor not capacitor, but close.

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 03, 2019, 10:23:22 pm
content: Quote from: Brumby on June 02, 2019, 03:47:32 amThis is a little different, in that the energy is taken from the item you want energy taken out of in the first place.

author: Bud
author_rank: Super Contributor
timestamp: June 03, 2019, 11:18:19 pm
content: They should not be saying the process happens without use of any energy. This is deception.
IEEE (forced to?) ban reviewers and content from Huawei - Page 1
Forum section: electronics / general

author: TheUnnamedNewbie
author_rank: Super Contributor
timestamp: May 29, 2019, 08:05:27 am
content: So, this just came in.I have also heard through colleagues that there has also been a second email stating that research groups funded by Huawei will also be banned from reviewing content, and I have also heard this could be extended to not being allowed to publish.https://twitter.com/qian_junhui/status/1133595554905124869This would seem to me to be perhaps a response to Huawei now pouring large amounts of money into EU universities, after they were forced to break ties with many US institutions. By doing this, you pretty much force those groups to either become a Huawei-only research group that doesn't publish, or break ties with Huawei too.More updates will likely follow, and IEEE has not released a public statement on this topic yet (at time of writing, which is 08:05 UTC)Some more links I found:https://twitter.com/HaibianSHITANG/status/1133630982698020864/photo/1

author: tszaboo
author_rank: Super Contributor
timestamp: May 29, 2019, 10:40:15 am
content: You know, it is very possible, that IEEE didn't start this:https://globalcompetitionreview.com/article/1193113/huawei-rejects-ieee-policy-for-some-ethernet-patents

author: TheUnnamedNewbie
author_rank: Super Contributor
timestamp: June 03, 2019, 05:08:30 am
content: The IEEE has released the following last night:QuoteSo good news!