hybridfree/eevblog-posts huggingface dataset:
0.65mm BGA 15 years ago? - Page 1
Forum section: electronics / general

author: soFPG
author_rank: Frequent Contributor
timestamp: October 24, 2019, 08:25:14 pm
content: Lately I am really interested in Mediatek CPUs (ARM based) because they are available for very cheap at well known chinese shops.But they are lacking in documentation. What I could find out though is that a almost 15 year old chip (MT6217) is only available in 0.65mm pitch BGA package?So 0.65mm BGA was common in entry-level ARM CPUs (56 MHz) back then but today 0.65mm didn't become a cheap option at the common chinese PCB fabs - why is that? How did the PCB manufacturing process develop in the last 15 years?
"Gravity Waves", Western Australian skies .... - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: October 24, 2019, 11:26:11 am
content: On our News TV this evening, they were talking about a Visual Phenomena in the sky,that they say is attributed to 'Gravity Waves' . . . .I have my own opinions about how/why/what 'gravity' could be explained, howeverI'm not convinced, (yet), whether the following explains things well enough !?https://www.abc.net.au/news/2019-10-23/satellite-captures-rare-atmospheric-gravity-waves-off-wa-north/11633004

author: radar_macgyver
author_rank: Frequent Contributor
timestamp: October 24, 2019, 11:45:08 am
content: Yes, these areGravity waves(waves created due to interaction between gravity and buoyancy) and notGravitational waves(disturbances in space-time caused by colliding black holes)
Element14 & RS Components silently linking unrelated accounts - Page 1
Forum section: electronics / general

author: liteyear
author_rank: Regular Contributor
timestamp: October 23, 2019, 08:26:10 pm
content: We've long battled Element14's impenetrable logic of associating individual accounts with business/credit cards/trade accounts/other accounts. I thought it was all finally behind us since I abandoned a long used, but ultimately borked, account and started a fresh one. The fresh one was intended to cast off the junk associations of the previous one and start anew with a new business name and email address.I've just discovered that an ex-colleague at an old job from >4 years ago has a record on their order history of every order I've placed with my new account.What madness is this? Are we just really lucky, or have others experienced unwanted account linking?I wonder if this issue ("undesirable feature") is not just Element14 - for a long time each of our individual RS Components accounts my employees have created all somehow manage to send order confirmations to a single, unrelated, now defunct, email address. I only know because all email to invalid addresses at my domain go to me. None of us have ever deliberately linked accounts, and we'd prefer they weren't, so this is some magic matching that RS Components is doing.In the RS case the results aren't undesirable, so I've never bothered to investigate, but in general it's a major concern than account information is being leaked to other accounts without our preference.
x-rays for looking inside electronic devices? - Page 1
Forum section: electronics / general

author: engineheat
author_rank: Frequent Contributor
timestamp: October 24, 2019, 09:08:03 pm
content: Hi,I wonder if there are businesses that offer x-ray services to look into a manufactured product, like electronic devices without having to open and disturb the device?Thanks

author: tautech
author_rank: Super Contributor
timestamp: October 24, 2019, 09:20:15 pm
content: Hunt out some earlier threads from Fraser, he's done heaps of this.He uses mainly dental units.

author: Someone
author_rank: Super Contributor
timestamp: October 24, 2019, 10:20:05 pm
content: Quote from: engineheat on October 24, 2019, 09:08:03 pmYes, they exist.I wonder if you can form a better question?

author: james_s
author_rank: Super Contributor
timestamp: October 24, 2019, 10:28:15 pm
content: I've done it many times, using dental and veterinary equipment. The machines can be found surprisingly cheaply, expired film is also cheap and usually fine. It can be developed with ordinary photographic chemicals and can be handled under a red safelight.

author: MosherIV
author_rank: Super Contributor
timestamp: October 24, 2019, 10:45:13 pm
content: I am pretty sure many electronics board assembly companies may have x-ray equipment.It is needed to inspect bga soldering.If you can hire them to build boards, I am sure you will be able to hire them to x-ray things for you.

author: james_s
author_rank: Super Contributor
timestamp: October 24, 2019, 11:25:50 pm
content: I should have mentioned, while it's easy to do, it's also something that has the potential to be dangerous enough that you should absolutely not try it yourself unless you are really confident that you know what you're doing.Legality aside, even a tiny little dental head has the potential to cause seriously nasty radiation burns, cancer or death if used carelessly.

author: Sal Ammoniac
author_rank: Super Contributor
timestamp: October 24, 2019, 11:27:39 pm
content: Do you need a license to own an X-ray machine in the U.S.?

author: james_s
author_rank: Super Contributor
timestamp: October 25, 2019, 12:59:49 am
content: To own? No. To operate it you don't technically need to be licensed yourself but it has to be an approved installation.

author: SerieZ
author_rank: Regular Contributor
timestamp: October 25, 2019, 08:31:33 am
content: Most serious PCB Assembly Factories have one.As Pointed out earlier to inspect BGA and other Components Soldering Joints which are hidden under the Component.Also sometimes they are used to try to find Problems and fix the more expensive Boards.I dont think a Chinese Company assembling cheap Boards would have such Luxury...Never heard of a Company offering just X-Ray services... I would not be surprised if it exists tho. Sounds so specialized tho it has to be expensive...
Youtube only shows last 200 videos. Why?! - Page 1
Forum section: electronics / general

author: Yansi
author_rank: Super Contributor
timestamp: October 23, 2019, 02:03:00 pm
content: Hello,I have just noticed, that when I open my account and click "videos", I can only load 200 videos maximum by clicking the "show more" repeatedly. My channel contains more than 200 public videos.That means, older videos can not be probably accessed by other users.Could you please verify in your channel, if you have one, that you can load more than 200 videos?I have found a brief notice of the problem here:https://support.google.com/youtube/thread/3707366?hl=enPlease up-vote and comment if you have the same issue.

author: StillTrying
author_rank: Super Contributor
timestamp: October 23, 2019, 02:47:05 pm
content: I make it 261 in FF, I don't have any current YT or google accounts.

author: senso
author_rank: Frequent Contributor
timestamp: October 23, 2019, 04:35:03 pm
content: Clear your browser cache/temp/cookies.I can see all the videos, running latest Chrome with uBlock Origin running, logged in into Youtube.
Electronics haiku - Page 1
Forum section: electronics / general

author: Tomorokoshi
author_rank: Super Contributor
timestamp: October 18, 2019, 03:16:01 pm
content: Although off and darkThe cathode ray tube emitsWarm satisfactionSurprised confusionPhilips should be PosidrivTrail of hackjobCapsule of glassRarefied air and metalAtomic powerBoatanchor rule:More weight equals more functionNeed a bigger boat!In EMC labEven if everything worksOh, the expenses!Drawers of ferritesUnsuspecting engineerLike a moth to flameCE is CEIs CE is CE isCE is CELim of RoHS nTo infinity means thatAll things from nothing

author: Johnboy
author_rank: Regular Contributor
timestamp: October 18, 2019, 11:44:11 pm
content: In an RC loopCurrent leads the dance againThe Iceman cometh.

author: Bud
author_rank: Super Contributor
timestamp: October 19, 2019, 12:24:16 am
content: Make sure tosmoke something nice beforereading or writing here

author: lordium
author_rank: Regular Contributor
timestamp: October 21, 2019, 02:41:31 am
content: Drink the TEA, dream big!Shelf now heavy with anchors,kids hungrily sleep.

author: Johnboy
author_rank: Regular Contributor
timestamp: October 21, 2019, 06:29:58 am
content: Driving nails through coilsMy refrigerator leftMagnets no excuse.

author: TerraHertz
author_rank: Super Contributor
timestamp: October 23, 2019, 12:21:12 pm
content: ebay victorySits on the bench for repair.Schematics not found.I know I have thatSomewhere among the boxes.Go buy a new one.CMOS is modern,Such wonderful data sheetsTo us old timers.Soldering is fun!So very gratifying.Not while wearing shorts.Discarded on kerb.Expecting some stupid fault.It works perfectly.Following tracesCan drive anyone insane.Shine a strong light through.Old misconceptionsWill haunt us all forever.Positive current.Reviled old white male?We should withdraw our support.See how long you last.

author: NivagSwerdna
author_rank: Super Contributor
timestamp: October 23, 2019, 12:26:17 pm
content: Cheery science labA little, crusty dave probewhilst watching the scope
Odorless flux for 0.5mm QFN soldering - Page 1
Forum section: electronics / general

author: Axk
author_rank: Regular Contributor
timestamp: October 27, 2019, 04:25:58 pm
content: Does it exist?I'm using a FluxPlus gel flux and it appears to work well, but it has this rather strong odor.Even with fume extraction if a bit of it remains on the board after soldering (before cleaning) it has this same odor (which e.g. rosin doesn't when it cools down).

author: DaJMasta
author_rank: Super Contributor
timestamp: October 28, 2019, 03:06:45 am
content: I wouldn't call it odorless, but I've been using Chipquik SMD291 and the odor while soldering is pretty low, can't smell it at all just sitting there on its own.

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 28, 2019, 03:03:10 pm
content: Quote from: DaJMasta on October 28, 2019, 03:06:45 amSame here. I've used the SMD291 quite a bit, and it's fine really as far as odor goes.
Adrian Bowyer's Instant 3D Printer - Page 1
Forum section: electronics / general

author: ssashton
author_rank: Frequent Contributor
timestamp: October 21, 2019, 06:51:47 pm
content: Hi Everyone,This very interesting video was released taking about a potential new 3D printing method passing electrical current through resin to cure it.Adrian is a founder of the RepRap moment, the idea of 3D printers being used to print nearly all the parts to replicate itself. He is certainly not a fool and I think that comes across in three interview.https://youtu.be/aFjrZIqtLZMI'd love to hear from those with knowledge in the field whether it is in some way possible to 'focus' a current in this manner?In the field of acoustics where I am more comfortable, it is possible to used an array of transducers with various phase shifts to focus a sound by constructive and destructive interference. Can a similar method work for AC through a conductive medium?? Does AC acts as a wave at all in a conductor?

author: thm_w
author_rank: Super Contributor
timestamp: October 21, 2019, 09:23:50 pm
content: https://reprapltd.com/electric-3d-printing/https://reprapltd.com/the-electric-3d-printer-first-attempt-to-print-a-controlled-shape/QuoteTangent:Current resins require UV curing and IPA washing, just saw an ad for water washable resin:https://filaments.ca/collections/3d-resin/products/polyjuice-water-washable-resin-greyhttps://cdn.shopify.com/s/files/1/0376/9913/files/PolyJuice-MSDS-NonCasting.pdf?2255It still looks like nasty stuff (per MSDS), but to me it sounds like a lot of innovation is possible.

author: ssashton
author_rank: Frequent Contributor
timestamp: October 21, 2019, 11:11:39 pm
content: Reading those links I don't make the connection about how the current would be forced to take a specific path and be greater at a specific three dimensional location.They simply say 'the current is programmed using the reverse of the spectra system', but in that system there is a physical object in the bath which has variable conductivity through it's body, hence it can be imaged.If you ran multiple electrodes with various phase AC waveforms, would there be constructive / destructive interference of current flow throughout the body of conductive medium?I mean we can do it 2D first, and it seems like their stimulation is doing just that - place electrodes around the perimiter of a conductive sheet like thin copper pcb, then can we create a modal patter of current in the sheet so that it only heats up at certain places?
Fake Terabyte USB Flash Drives - Now Available On Amazon Prime! - Page 1
Forum section: electronics / general

author: Deodand2014
author_rank: Regular Contributor
timestamp: October 16, 2019, 01:58:04 pm
content: This one failed under test, the YouTuber in question has covered a number of other fake high capacity USB drives from other online stores (Wish.com, Aliexpress, eBay, etc.)

author: tooki
author_rank: Super Contributor
timestamp: October 17, 2019, 10:04:11 am
content: What I find so insidious about those things is how they are practically guaranteed to result in data loss, since they pretend to work, rather than just outright failing to write.The vendors should just take 128GB drives (which report themselves to the OS as 128GB) and market them as 2TB with an asterisk that says “assuming 16:1 compression ratio”, sorta how tape drive vendors used to do.

author: amyk
author_rank: Super Contributor
timestamp: October 17, 2019, 11:54:41 am
content: Related:https://www.eevblog.com/forum/dodgy-technology/obvious-fake-memory-cards/Quote from: tooki on October 17, 2019, 10:04:11 amThey still do that. LTO-8 is actually 12TB but they call it a "30TB" tape.

author: German_EE
author_rank: Super Contributor
timestamp: October 19, 2019, 11:32:45 am
content: Rule number one, if something appears too good to be true then walk away.Rule number two, buy your storage hardware from trusted brick and mortar stores, pay with a credit card and get a receipt. That way if anything goes wrong you can get a refund.Rule number three, a fool and their money are soon parted.

author: Cyberdragon
author_rank: Super Contributor
timestamp: October 22, 2019, 03:28:07 pm
content: Rule four: never fully trust big corporations anymore than you can Chinese sellers. Amazon is in it to win it as they say and will stop at nothing to try and crush competition even if that means being shady and selling fake crap.I've seen stuff sold by major upscale retailers that have reviews of the product EXPLODING potentially causing injury or death.
boston dynamics New robots - Page 1
Forum section: electronics / general

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: October 28, 2019, 06:40:02 am
content: Hi,Any ideas on this one?

author: BrianHG
author_rank: Super Contributor
timestamp: October 28, 2019, 06:57:44 am
content: It's a fake, done with video 3D superimposing editing techniques.Hence the name at the bottom right 'Bosstown Dynamics'.....

author: deskpro256
author_rank: Contributor
timestamp: October 28, 2019, 06:58:10 am
content: Yea, same as the first one. Made by Corridor Digital. Here is the behind the scenes video of the second video:First one:BTS of the first one:

author: SerieZ
author_rank: Regular Contributor
timestamp: October 28, 2019, 08:16:45 am
content: Even tho it is obvious once the overt ridiculous stuff happens... that is some damn fine Editing done by them.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: October 28, 2019, 10:56:40 am
content: Then it's a good fake

author: German_EE
author_rank: Super Contributor
timestamp: October 28, 2019, 11:03:10 am
content: How did I know this was fake? All of the Health and Safety violations. It's bad enough giving a robot a live weapon but to then introduce real human beings into the test area, not gonna happen.Nice bit of CGI though.
Tektronix LCD CRT Hybrid Oscilloscope Display Technology - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: October 21, 2019, 02:02:55 pm
content: Tektronixs an American manufactur of oscilloscopes,made a full color LCCS LCD cathode-ray tube or CRT Hybrid display, that ended up with the japanese JVC? or Japan Victor Company.see this part of the video at- 9:18the display technology called NuColor. were is the US patents for this? how did JVC get the rights to this? how did this happen?more about NuColorhttps://hackaday.com/tag/nucolor/LCCS The LCD CRT Hybrid from JVC

author: james_s
author_rank: Super Contributor
timestamp: October 21, 2019, 03:21:08 pm
content: I have a scope with the NuColor display, it's fantastic. It produces a beautiful image, sharp with that smooth clean CRT look but in full color without the screendoor effect of a shadow mask. It looks much better than the TFT displays they used on later scopes.

author: Gyro
author_rank: Super Contributor
timestamp: October 21, 2019, 04:52:25 pm
content: Quote from: jonovid on October 21, 2019, 02:02:55 pmMaybe the patent has expired and Tek didn't feel the need to extend it. They were using the colour LCD shutter, monochrome CRT on the TDS754 back in the mid '90s. It did have a bit too much peripheral vision flicker if you moved your eyes too quickly.

author: nctnico
author_rank: Super Contributor
timestamp: October 21, 2019, 05:09:05 pm
content: Quote from: Gyro on October 21, 2019, 04:52:25 pmI agree. I can't work with those displays at all. I upgraded every Tek scope from that series I owned with a TFT display.

author: james_s
author_rank: Super Contributor
timestamp: October 21, 2019, 05:09:47 pm
content: That is a flaw it shares with DLP, I've noticed it appears much worse to me when I'm very tired, most of the time I don't really see it at all. I think the end result is still very good though, it looks much better to me than LCDs of the era, it's so smooth and the contrast ratio is phenomenal. Nice colors on an inky black background, only OLED comes close.

author: Gyro
author_rank: Super Contributor
timestamp: October 21, 2019, 05:29:34 pm
content: Quote from: james_s on October 21, 2019, 05:09:47 pmYes, very similar, though colour wheels typically alternate much faster than those LCD shutters could manage.QuoteOh yes, no question.
EU: Which TARIC code for a GPSDO? - Page 1
Forum section: electronics / general

author: thinkfat
author_rank: Unknown
timestamp: October 17, 2019, 12:29:05 pm
content: Hi,I'm currently trying to find out where one of my ebay purchases went, according to the logistics company it has been handed over to customs quite some time ago and I guess it's meanwhile on its way back to China.Usually, Ebay vendors from far east can't be arsed to provide a proper customs declaration so I figured it might be a good idea to give them a hint when I order something next time.I checked the TARIC database and I think one of the following codes from Section XVIII is applicable:9031 80 80, for a general measurement instrument that isn't a balance, geometrical measurement or optical equipmentor9031 90 00, a part or accessory for a general measurement instrument.I'd like to hear your opinions.

author: Someone
author_rank: Super Contributor
timestamp: October 18, 2019, 02:35:16 am
content: 9033.00.908517.70

author: bitwelder
author_rank: Super Contributor
timestamp: October 18, 2019, 09:19:40 am
content: Supposing that there wasn't any difference in custom duties for the different categories, has anyone been in any trouble for reporting an item in a slightly wrong category?

author: thinkfat
author_rank: Unknown
timestamp: October 21, 2019, 09:57:10 am
content: Hm, I'm pretty sure the TARIC declaration is open to interpretation. As long it's not high-volume stuff that is being shipped, customs officers usually don't spend a lot of time on a single packet. They're not skilled enough to find a correct declaration code anyway. Well, that's actually not true, they are trained to do that, but that kind of research costs quite some time and it's just not worth their time. I just collected a packet from customs and the officer just asked me to provide the ebay transaction details since he needed to check the shipment cost. He did ask me what was in the shipment and to open the packet and show the content, but of course he couldn't make hands or tails of what was inside. So, he just collected the import VAT and send me off to mind my own business.
How does a phone fingerprint scanner work? - Page 1
Forum section: electronics / general

author: soldar
author_rank: Super Contributor
timestamp: October 20, 2019, 08:55:21 pm
content: I have started using a Samsung Galaxy S7 Edge and the main button has a fingerprint scanner which allows unlocking the phone. I am curious as to how it works and I did some searching and all I could find is that it is by ultrasound.I do not understand how an ultrasound transducer can read fingerprints. Does itreallyread fingerprints? I mean the prints from the skin as taken by the Gestapo. Or is it more of an ultrasonic signature of the entire finger? Even then it seems magical.So,how do they do it?

author: MosherIV
author_rank: Super Contributor
timestamp: October 20, 2019, 09:20:27 pm
content: Your googlefoo is weak young onehttps://thenextweb.com/plugged/2019/07/23/how-does-in-screen-fingerprint-scanner-work/https://www.androidauthority.com/how-do-ultrasonic-fingerprint-scanners-work-666053/

author: soldar
author_rank: Super Contributor
timestamp: October 21, 2019, 05:25:12 am
content: Quote from: MosherIV on October 20, 2019, 09:20:27 pmYes, I had seen those pages but I was hoping for something more detailed.QuoteGreat. How do I build one?

author: MosherIV
author_rank: Super Contributor
timestamp: October 21, 2019, 07:09:25 am
content: QuoteWith a LOT of time, money, equipment, learning, trial, error, even more time and money.I worked in ultrasonic ndt. The analogue front end electronics is very difficult.That was only single beam and sinlge point through material.The finger print application sounds like array sensor - 50x more complexity than single beam.The software behind array sensor was way beyond meThe resolution to get finger print ridges is also very very high, so very difficult.

author: tom66
author_rank: Super Contributor
timestamp: October 21, 2019, 07:56:59 am
content: I had a theory that the ultrasound fingerprint scanner is not doing anything more fancy than a frequency sweep, recording the intensity for given bins and matching this up against a known model.And this method is not very secure but then people want on-screen fingerprint scanning for some reason.

author: Zero999
author_rank: Super Contributor
timestamp: October 21, 2019, 08:17:24 am
content: I found this patent, after a bit of Googling.https://patents.google.com/patent/US8601876B2/en
Any ideas what this is? - Page 1
Forum section: electronics / general

author: NivagSwerdna
author_rank: Super Contributor
timestamp: October 22, 2019, 07:54:49 am
content: See photoA MCU of some kind?

author: jaromir
author_rank: Unknown
timestamp: October 22, 2019, 08:18:29 am
content: Perhaps AtMega48V?Does pinout match datasheet?http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2545-8-bit-AVR-Microcontroller-ATmega48-88-168_Summary.pdf

author: NivagSwerdna
author_rank: Super Contributor
timestamp: October 22, 2019, 08:25:56 am
content: I didn't know there was such a thing! That seems very feasible, I will look closer.

author: mengfei
author_rank: Regular Contributor
timestamp: October 22, 2019, 08:41:29 am
content: check these outhttps://www.newark.com/microchip/atmega48v-10mu/microcontroller-mcu-8-bit-atmega/dp/68T3048?CMP=AFC-ECIAhttps://www.amazon.in/Generic-ATMega48V-ATMega48-Development-System/dp/B071YMHP4Thttps://www.aliexpress.com/item/624847023.html

author: amyk
author_rank: Super Contributor
timestamp: October 22, 2019, 11:43:26 am
content: What is it from?
Poster/chart with SMPS converter topologies - Page 1
Forum section: electronics / general

author: soldar
author_rank: Super Contributor
timestamp: October 20, 2019, 10:53:47 am
content: Rummaging in my files I found a TI chart which I found useful and interesting in understanding the different SMPS topologies.It has all the different topologies and a basic description of currents and voltages which helped me understand the basics of each one.The one topology I find missing is the Cuk converter which, I suppose, can be considered a variant of the SEPIC converter.A similar chart can be found athttp://www.ti.com/lit/sg/sluw001f/sluw001f.pdf. That one seems like a variant of the one I have which is much older. I suppose they complement each other.The old one I am attaching is about 560KB while the newer one at TI is 19600KB even though they contain pretty much the same information.Maybe someone will find this useful. I have found a lot of useful documentation at the TI site.
C13 protection plugs - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: October 18, 2019, 10:46:43 pm
content: HiI ordered an Offline UPS with the IEC Plugs/ C13. So I need to cover quite all because the get on behind the Table and will just maintained every some month. I want to cover the Ports to prevent Dust and other Stuff to get into and maybe cause a Fire. I found them:https://www.ebay.de/itm/BLANKING-COVER-IEC-CONNECTORS-14228-Fnl/391793069668?hash=item5b38afce64:g:ds0AAOSw3gJZJIqOWell I dont want something who is pocked into the UPS Power Plugs.Are the some similar Plugs?Thanks

author: Gregg
author_rank: Super Contributor
timestamp: October 18, 2019, 11:14:04 pm
content: Electrical tape; start with the sticky side out at the smaller end to prevent a sticky mess when removed and after you have covered the plug, twist the tape over and wrap it sticky side in.

author: stevelup
author_rank: Regular Contributor
timestamp: October 19, 2019, 09:54:15 am
content: You are looking for a solution to a problem that does not exist.

author: tooki
author_rank: Super Contributor
timestamp: October 21, 2019, 11:44:06 am
content: Quote from: Lord of nothing on October 18, 2019, 10:46:43 pmMuch of this post is incomprehensible, but if you google for “c13 cover” and “c13 cap” you’ll find plenty. (Are you trying to say you want a cover without pins?)That said, unless you’re operating them in an environment with some combination of metal dust and moisture, I don’t think it’s necessary. (If the regular wall outlets are unprotected, then there’s no need to seal the UPS outlets.) I’ve never heard of anyone ever doing this, other than to cover extra ports to prevent overloading the UPS, which is what many of the covers are specifically sold for.

author: Lord of nothing
author_rank: Super Contributor
timestamp: October 21, 2019, 01:15:08 pm
content: Its going into a dusty environment. I had to totaly open and clean my offline UPS the was that dusty inside.So I want prevent that with cover the Plugs who are unused.

author: Jeroen3
author_rank: Super Contributor
timestamp: October 21, 2019, 01:52:18 pm
content: Looks like a nice justification to get that 3D printer.But what is wrong with those plastic blanking covers? Eg: Bulgin 14228

author: senso
author_rank: Frequent Contributor
timestamp: October 21, 2019, 02:53:43 pm
content: The plugs are sealed, I never saw C13 plugs with holes that allow for dust ingress..Maybe apply some mesh on the UPS openings, but covering the plugs wont prevent any dust ingress...

author: Lord of nothing
author_rank: Super Contributor
timestamp: October 21, 2019, 03:34:02 pm
content: Its this one:Since I plug some PoE extender and maybe a Switch into I decided to buy the C13 Version to get directly with the power cable from the UPC to the Device.
Anyone have trouble viewing youtube tonight? - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: October 17, 2019, 12:09:29 am
content: Anyone have trouble viewing youtube tonight?My location, Montreal, Quebec, Canada...Browser = FireFox, 60.9.0esr (64-bit).(It's Youtube.com, videos inside message links still works...)

author: ataradov
author_rank: Super Contributor
timestamp: October 17, 2019, 12:57:53 am
content: No problems on my end. But it looks like a lot of people are having problems.

author: Yansi
author_rank: Super Contributor
timestamp: October 17, 2019, 01:08:09 am
content: No problem in central EU either.

author: Bud
author_rank: Super Contributor
timestamp: October 17, 2019, 01:16:18 am
content: Toronto was OK as you posted this, I was watching The Signal Path channel.

author: BrianHG
author_rank: Super Contributor
timestamp: October 17, 2019, 02:52:19 am
content: It came back around an hour ago, just all by itself.Probably something with my login and Gmail.

author: EEVblog
author_rank: Unknown
timestamp: October 17, 2019, 04:01:39 am
content: Yes, description and title and comments all blank.Confirmed by others on Twitter.Some get it some don't.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: October 17, 2019, 04:21:01 am
content: Quote from: EEVblog on October 17, 2019, 04:01:39 amSame here in Central Texas USA. Everything blank except the video, which does play OK. I thought it was something wrong with my own installation. I have an addon called "YouTube Classic" and when I activate that addon, everything that was missing comes back. I've switched back and forth several times. Addon off, nothing but the video. Addon active, everything looks normal. Weird.

author: bitwelder
author_rank: Super Contributor
timestamp: October 17, 2019, 06:55:57 am
content: It seems there were some issues about 6 hours ago (at this time of writing).Check e.g. with services like Downdetector or Downrightnowhttps://downdetector.com/status/youtube/http://downrightnow.com/youtube

author: Deodand2014
author_rank: Regular Contributor
timestamp: October 17, 2019, 07:08:11 am
content: I didn't have any problems viewing YouTube this morning. I did notice on one forum a number of linked YouTube videos where the title bar read "302 Moved" instead of the video title which was visible on clicking through to YouTube.
Lost website - Page 1
Forum section: electronics / general

author: tholland
author_rank: Newbie
timestamp: October 07, 2019, 03:47:45 pm
content: I am slowly building Grant Searle's Z80 sbc. However, I can no longer access his website because it is sleeping! Does anyone know how to wake it up?

author: Twoflower
author_rank: Frequent Contributor
timestamp: October 07, 2019, 03:50:55 pm
content: Maybe the internet archive.org helps:https://web.archive.org/web/20181123194029/http://searle.hostei.com/grant/index.html

author: tholland
author_rank: Newbie
timestamp: October 07, 2019, 06:22:04 pm
content: Thanks Twoflower, you're a star!

author: Codex
author_rank: Contributor
timestamp: October 17, 2019, 03:58:13 am
content: He has a mirror here.http://zx80.netai.net/grant/index.htmltwitter for updates and links to the mirrorhttps://twitter.com/zx80nut?lang=en
File attachments when replying to PMs - Page 1
Forum section: electronics / general

author: andy3055
author_rank: Super Contributor
timestamp: October 15, 2019, 08:10:20 pm
content: Is it not allowed to attach files when replying to a PM from another member? I did not see the option.Thanks.

author: tautech
author_rank: Super Contributor
timestamp: October 15, 2019, 08:56:40 pm
content: Quote from: andy3055 on October 15, 2019, 08:10:20 pmNope, not supported.The only way is to get the other members email or some file transfer repository to send files back and forth.

author: Muttley Snickers
author_rank: Unknown
timestamp: October 15, 2019, 09:27:53 pm
content: If the type and size of a file is one that is permitted in normal posts then one way to transfer it to another member is to edit an older existing post and attach the file, then notify the other party where the file is located by way of a private message. Once the file has been acquired by the other party a user can edit the post again and remove the file. This method does not require the exchange of an email address or remote repository but is rather limited and less secure.

author: andy3055
author_rank: Super Contributor
timestamp: October 16, 2019, 12:39:25 am
content: Thank you gentlemen. That confirms my thoughts.
Accessing mobile site - Page 1
Forum section: electronics / general

author: james_s
author_rank: Super Contributor
timestamp: October 15, 2019, 08:36:19 pm
content: I'm probably going to feel dumb after hearing the answer to this but I accidentally hit the "view full site" link on my phone and now I'm not sure how to get back to the mobile optimized interface. Can someone clue me in?

author: tooki
author_rank: Super Contributor
timestamp: October 15, 2019, 09:38:16 pm
content: Look in the last line of the footer. In small blue-gray text over the gray mesh background, almost illegibly, there's a link called "mobile". And since it's nearly illegible, here's its URL for you:https://www.eevblog.com/forum/index.php?thememode=mobile;redirect=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Fchat%2Faccessing-mobile-site%2FSince it's copied from this page, that link includes a redirect to this page. Here it is without it, takes you to the forum index:https://www.eevblog.com/forum/index.php?thememode=mobile

author: james_s
author_rank: Super Contributor
timestamp: October 15, 2019, 10:00:18 pm
content: Oh wow there it is, that really is almost invisible, I couldn't see it at all without scrolling all the way down and zooming way in. Thanks!

author: tooki
author_rank: Super Contributor
timestamp: October 15, 2019, 10:06:54 pm
content: Yeah, without knowing it's there, one is unlikely to even notice there's anything there at all!! (I have no idea what would possess a web designer to put blue-gray text on a gray background...)
What if your toroid transformer is super conducting? - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: October 15, 2019, 08:57:03 pm
content: Say you were wrapping a toroid and you put it in liquid nitrogen would the value (henry's) go way up or down? What if the toroid was made from YBCO material, or what if the ring was made from a type I superconductor (the ones where liquid helium is needed)? The same value? Would this have any practical application?YBCO could be crushed into toroids as its like a ceramic and works at liquid nitrogen temps.

author: Gyro
author_rank: Super Contributor
timestamp: October 15, 2019, 09:11:57 pm
content: The purpose of a laminated core, either EI or toroidal is to prevent eddy current losses. A laminated superconducting core would behave identically (material characteristics permitting).Asolidsuperconducting core would increase your core losses to infinity - zero inductance.
How to create a PDF/offline version of Jekyll docs documentation? - Page 1
Forum section: electronics / general

author: Martin F
author_rank: Regular Contributor
timestamp: October 15, 2019, 11:53:46 am
content: Hi all,We're doing our documentation via Jekyll docs, which for the most part works very well.However, some users prefer to have an offline version, e.g. in PDF form.We were wondering if some of you have good experiences with tools for this purpose?We considered e.g. wkhtmltopdf and the ruby gem pdfkit - this could probably work, but it seems rather challenging to get the internal links to work properly. Alternatively we thought about if there would be a way to "bundle" the entire _site output into a single offline html file that could then be used by end users without an internet connection.Any suggestions on these?Martin

author: madires
author_rank: Super Contributor
timestamp: October 15, 2019, 01:16:15 pm
content: https://github.com/abeMedia/jekyll-pdf
is anyone a member of circuit-board.de ? - Page 1
Forum section: electronics / general

author: fabiodl
author_rank: Frequent Contributor
timestamp: October 16, 2019, 12:42:32 am
content: Hello, I tried to register onhttps://circuit-board.debut I am not getting my account activated, and I find no way to contact the admins. If someone is registered there, could you message one administrator?--EDIT--I finally got my account activated
Fascinating channel on optics and working glass - Page 1
Forum section: electronics / general

author: daqq
author_rank: Super Contributor
timestamp: October 14, 2019, 07:31:12 pm
content: Optics is far from my area of expertise, so a lot of what he's doing seems like witchcraft... but it's beautiful what can be done with glass and the techniques are intriguing. I have only watched a few videos so far, but they are very enjoyable:https://www.youtube.com/channel/UC26YLK0OEbLB3TCYxGh8xVQ
What's all that Pease prototype stuff, anyhow? - Page 1
Forum section: electronics / general

author: Bud
author_rank: Super Contributor
timestamp: October 12, 2019, 06:18:08 pm
content: An cool article in Electronics Design magazine about digging through boxes with Bob Pease's and others' manually built prototypeshttps://www.electronicdesign.com/analog/what-s-all-pease-prototype-stuff-anyhow

author: 0culus
author_rank: Super Contributor
timestamp: October 13, 2019, 03:53:35 pm
content: Some real history there. Thanks for sharing.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: October 13, 2019, 04:51:41 pm
content: Great stuff. I always liked Pease's articles. He described many of his breadboard techniques in them.The shear volume of prototypes speaks worlds about a curious mind that really looked into how things work, going beyond models to reality.

author: Bud
author_rank: Super Contributor
timestamp: October 13, 2019, 09:43:33 pm
content: I like the guys working for serious companies did not hesitate having fun as the Widlar's story tells in this article, great stuff
Trying to identify a part - Page 1
Forum section: electronics / general

author: psubond
author_rank: Contributor
timestamp: October 12, 2019, 05:31:15 pm
content: I am trying to identify this IC from one of those 10mmx10mm boost converters that take lower voltages to 5.5vdc. Normally I can find any datasheet I am looking for, but with this one I am coming up blank, I can't find the parts to buy or a datasheet anywhere. Any help would be appreciated.

author: amyk
author_rank: Super Contributor
timestamp: October 12, 2019, 11:27:06 pm
content: ME2108:https://datasheet.lcsc.com/szlcsc/Nanjing-Micro-One-Elec-ME2108A50M3G_C14839.pdfThe two-semicircles logo is MicrOne.

author: bob91343
author_rank: Super Contributor
timestamp: October 12, 2019, 11:54:41 pm
content: It does appear to be a transistor. Perhaps you can probe it with one of those magic Chinese mega328 units to learn more. It's likely that the top terminal is connected to the center pin below.An Ohmmeter might tell if it's a bipolar transistor.

author: amyk
author_rank: Super Contributor
timestamp: October 13, 2019, 02:44:14 am
content: Quote from: bob91343 on October 12, 2019, 11:54:41 pm...seriously? Even after I identified the part you still think it's something else? Ishttps://www.chinahao.com/product/548793956317/or all the pictures from other sellers not proof enough?
Old Audio gear service info - Page 1
Forum section: electronics / general

author: andy3055
author_rank: Super Contributor
timestamp: October 11, 2019, 02:07:23 am
content: I have some old audio gear service info for various brands/makes like Phase Linear, Pioneer etc. Not a whole lot though. Is anyone looking for such info by any chance? I am in the process of cleaning out my collection of books, manuals, magazines etc.Thanks.

author: 001
author_rank: Super Contributor
timestamp: October 12, 2019, 09:23:27 am
content: Great deal, Andy

author: MosherIV
author_rank: Super Contributor
timestamp: October 12, 2019, 09:25:34 am
content: Why not scan them and upload?

author: andy3055
author_rank: Super Contributor
timestamp: October 12, 2019, 05:08:15 pm
content: I was thinking of the scanning idea. I have to do a whole bunch of other stuff around the house before I sit down to do that. I thought retiring will keep me free but when I look at things that got in the back burner all these years, it makes me wonder if I will ever finish them! Sometimes I think if I finish all that, there won't be anything else to keep me going.One of these days, I will make a list and update this thread to see if anyone will need them. By the way, is there a specific place for that sort of info on eevblog.com?Thanks.
Why I`m so evil every saturday? - Page 1
Forum section: electronics / general

author: 001
author_rank: Super Contributor
timestamp: October 12, 2019, 09:14:48 am
content: I see a lot of dumb silly treads, ugly schematics and overpriced crap every saturdayIs it real world or I`m so evil ?

author: jpanhalt
author_rank: Super Contributor
timestamp: October 12, 2019, 09:20:57 am
content: Quote from: 001 on October 12, 2019, 09:14:48 amI see mispelled (sic) words.

author: 001
author_rank: Super Contributor
timestamp: October 12, 2019, 09:25:26 am
content: Quote from: jpanhalt on October 12, 2019, 09:20:57 amHow do You speak it in US?

author: jpanhalt
author_rank: Super Contributor
timestamp: October 12, 2019, 09:30:22 am
content: The correct spelling for "mispelled" is "misspelled." Is that your question?

author: 001
author_rank: Super Contributor
timestamp: October 12, 2019, 09:34:33 am
content: Quote from: jpanhalt on October 12, 2019, 09:30:22 amHuhI see a sort of grammar nazi troll hereAnd I`m became evil again

author: Mr. Scram
author_rank: Super Contributor
timestamp: October 12, 2019, 10:08:25 am
content: Quote from: 001 on October 12, 2019, 09:14:48 amIf you stopped posting them you wouldn't see them any more.

author: 001
author_rank: Super Contributor
timestamp: October 12, 2019, 10:23:31 am
content: Sorry for my englisch

author: Gyro
author_rank: Super Contributor
timestamp: October 12, 2019, 11:11:28 am
content: Please stop posting when you've been drinking - you may think that you're making sense but you're really not.

author: 001
author_rank: Super Contributor
timestamp: October 12, 2019, 02:49:51 pm
content: No reason to not drink today, isnt`it?

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 12, 2019, 02:55:43 pm
content: Indeed.

author: coppercone2
author_rank: Super Contributor
timestamp: October 12, 2019, 03:12:02 pm
content: go outsideyou are looking at a ocean beach and complaining what animals swim in and then think you can put a sign that will prevent certain animals and thrown away garbage from floating/swimming in

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 12, 2019, 03:29:12 pm
content: I'm sure it's pretty cold outside where he lives.

author: coppercone2
author_rank: Super Contributor
timestamp: October 12, 2019, 03:31:10 pm
content: Quote from: SiliconWizard on October 12, 2019, 03:29:12 pmthis is why the 70,000$ position at palmer is a bad ideaI thought about it a few times then I watched 'the thing' and thought 'no way'.

author: Cyberdragon
author_rank: Super Contributor
timestamp: October 12, 2019, 03:34:07 pm
content: Quote from: coppercone2 on October 12, 2019, 03:12:02 pmHey water, no littering, or you'll be fined!

author: Simon
author_rank: Unknown
timestamp: October 12, 2019, 03:42:32 pm
content: Oh it's another one of 001's threads. Maybe he mistook this forum for facebook
Keysight Ebay is the best - Page 1
Forum section: electronics / general

author: Zucca
author_rank: Unknown
timestamp: October 12, 2019, 10:38:14 am
content: Short happy story here to report.I bought a scope form Keysight Ebay, and it was quickly delivered in Germany.Everything was in great condition but I decided to return the scope for other reasons (it's another story).I shipped the device back to Keysight but it did not go through the Malaysia customs (yes you need to return the device to the Malaysia Keysight Headquarter) for some reasons.My scope was (well, it is still) held by custom import for about 10 day.After opening a case at the Malaysia POS, I contacted Keysight and they took care about this incident as expected.They even gave me the full refundBEFOREto get the scope back in their hands.They will be very happy because the scope is in the same immaculate condition as when it came to me (it did not even smell like a used device..).Respect to Oliver, Martina, Lim and Chen Lai and all the others Keysight associates.Wonderful job and happy customer here.I post this to spread the nice experience, normally only the bad ones goes out in the www.

author: Mr. Scram
author_rank: Super Contributor
timestamp: October 12, 2019, 11:05:40 am
content: Now I really wonder how used devices smell and whether I got lucky so far in that regard.

author: bd139
author_rank: Super Contributor
timestamp: October 12, 2019, 11:06:53 am
content: Only things that tend to be horrid if you buy them second hand are musical instruments and consumer electronics. Lab instruments, unless they've been in some rancid nicotine soaked ham shack, are usually fine. That's a relatively recent thing though. 25 year ago I worked in a company that had a smoking room next to the labs.

author: Mr. Scram
author_rank: Super Contributor
timestamp: October 12, 2019, 11:14:06 am
content: Quote from: bd139 on October 12, 2019, 11:06:53 am25 years ago every room was a smoking room.

author: awallin
author_rank: Frequent Contributor
timestamp: October 12, 2019, 12:20:21 pm
content: what about ROHS and EU/Italy - only a few of the new scopes are ROHS compliant - no problems there?
Cosmonaut Alexei Leonov, Who Was First to Walk in Space, Dies at 85 - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: October 11, 2019, 09:51:02 pm
content: https://www.space.com/cosmonaut-alexei-leonov-first-spacewalker-dies-at-85.html
Speaking of slide rules - bad math joke - Page 1
Forum section: electronics / general

author: rrinker
author_rank: Super Contributor
timestamp: October 11, 2019, 02:07:06 pm
content: After 150 days off flooding, Noah released all the animals from his ark and commanded then to go forth and multiply.After some time, he saw that the flocks and herds were regaining their numbers, but he came across a pair of snakes who had laid no eggs, and were just laying about.“Why have you not multiplied?” he asked.To which the snakes responded,“we can’t, we’re adders.”Noah being a quick thinker went off into the woods to fell some trees, and fastened them together into a platform.He then placed the snakes on the platform and lo and behold the snakes immediately laid a clutch of eggs.Because you see, even adders can multiply on a log table.
ON Semi's website sucks - Page 1
Forum section: electronics / general

author: floobydust
author_rank: Super Contributor
timestamp: October 09, 2019, 07:10:24 pm
content: Does the sort/filter/parametric table work at all for people?https://www.onsemi.comI just get a spinning circle, using a few different browsers on a few different PC's, cookies enabled and no ad blockers. All I find are analytics-related errors from Firefox:The resource at “https://script.crazyegg.com/pages/scripts/0083/2019.js?438291” was blocked because tracking protection is enabled.The resource at “https://munchkin.marketo.net/munchkin.js” was blocked because tracking protection is enabled.The resource at “https://cdn.taboola.com/libtrc/unip/1185727/tfa.js” was blocked because tracking protection is enabled.The resource at “https://connect.facebook.net/en_US/fbevents.js” was blocked because tracking protection is enabled.The resource at “https://snap.licdn.com/li.lms-analytics/insight.min.js” was blocked because tracking protection is enabled.The resource at “https://www.googleadservices.com/pagead/conversion_async.js?cjs=0” was blocked because tracking protection is enabled.The resource at “https://www.google-analytics.com/analytics.js” was blocked because tracking protection is enabled.JQMIGRATE: Migrate is installed, version 1.4.1Never mind that it's a slow POS website for a Fortune 500 company with $7.4B market cap.Thanks ON-Semi for buying Fairchild and killing off the datasheets, jumbling app notes and leaving us with a kindergarten website. What an absolute mess

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 09, 2019, 10:51:23 pm
content: Well, parametric/filters seem to work fine here for small lists of products, but take ages for the longer lists (like when there are more than a few tens of items...) It still ends up listing items, but it's very very veryyyy slow.And overall, the web site is currently ULTRA slow.