hybridfree/eevblog-posts huggingface dataset:
JBC C245 Clone - Page 1
Forum section: electronics / general

author: DiddlyJackSquat
author_rank: Contributor
timestamp: May 24, 2021, 05:41:23 am
content: Yes, I kid you not. It is really miles ahead of my T12 station (those who want to believe it's worse than the fx951 go ahead, I'm not in your camp)Internal 24V psu is VERY beefy for its size 24V 8A SMPS inside. Although you might say "yeah but JBC has some magic sauce!" Well not really, end of the day irons are irons this is essentially a more powerful T12 and so far my experience with it has been nothing short of impressiveIt's really so fast when I first turned it on I thought it was broken when it reached 270c the moment I looked back at the displayIt too has auto detection for the tip!

author: RayRay
author_rank: Frequent Contributor
timestamp: May 24, 2021, 07:11:36 pm
content: Thanks for sharing. That said, you better check if the enclosure itself is properly grounded (given the fact it's made out of metal) and as for it being "a more powerful T12" I'd say you're exaggerating, it probably heats a bit more quickly, but with the same tip & proper temperature calibiration, there shouldn't be a huge performance difference between em.

author: Shock
author_rank: Super Contributor
timestamp: May 24, 2021, 08:57:20 pm
content: Why worry about JBC clones even? The Unisolder is $100 for the completed PCBs with display and it runs every notable handpiece including Pace, Weller, JBC even some Ersa, plus all the tweezers. Plus the firmware is well developed, tested and has button and encoder control.Every entire clone is rubbish now it's just plug and play. You can run the original handpieces or clone handpieces as long as you know it's wire correctly no problem.

author: floobydust
author_rank: Super Contributor
timestamp: May 24, 2021, 09:29:59 pm
content: Where's the teardown pictures, we want to see the miles ahead inside and the tiny mosfet switching the heater onI'll bet it still has a flimsy stand that doesn't fit so good. Why does the sticker say "do not use during thunder storm weather" or "wet hands" ? I think AvE must have made itHigher power soldering tips are not the Holy Grail. The lack of (tip and cable) copper, crappy plating, skinny cord, poor connections to cartridge etc. all add up to a hassle some people don't mind for the cost savings, others strongly dislike it all.

author: floobydust
author_rank: Super Contributor
timestamp: May 25, 2021, 04:13:11 am
content: The mains SMPS PCB is just glued down? Bueller, Bueller! At least they used fish paper... no sign of a safety groundThe controller displays a bogus temperature when a tip is cooled. I dunno, this station needs some work.

author: DiddlyJackSquat
author_rank: Contributor
timestamp: May 25, 2021, 04:15:03 am
content: Quote from: Shock on May 24, 2021, 08:57:20 pmThat's because this is HALF the price of that.

author: floobydust
author_rank: Super Contributor
timestamp: May 25, 2021, 04:52:41 am
content: A real JBC handle alone is USD $77, about the price of this entire station kit - handle, cartridge, case, controller, PSU, holder.It's much less than 1/2 the price. Reviews are not so great though.
Suggestions? Android app that can import marine GPS positions and navigate - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 23, 2021, 07:57:31 pm
content: A buddy of mine has gone fishing. I should be there but work beckoned.I have a dozen or so position marks in text format and I'd like to send them to the guy's phone in the hope that he could import them into a GPS app that allows selection of one and then presents an large arrow/compass and distance whilst hopefully avoiding all the soc media/need access to contact list nonsense, or indeed any road navigation.Need a simple barebones app. Basic tracking could be useful but not essential.Target phone is Galaxy 6 or 7.Do you have any ideas?Looking at this so far..https://play.google.com/store/apps/details?id=com.vecturagames.android.app.gpxviewer&hl=en&gl=US
What is the name of this physicist? - Page 1
Forum section: electronics / general

author: vlad777
author_rank: Frequent Contributor
timestamp: May 21, 2021, 08:47:59 pm
content: What was the name of the physicist who conviced a laboratory to do his experiment and then the lab director got the nobel prize?I think his discovery was a particle. I think I saw this on BBC and the presenter was Jim Al-Khalili or someone like that (Brian Cox?).I also remember a scene (in the lab) where they record a computer screen, with a spike in the chart ,which is the proof.Many thanks.

author: DrG
author_rank: Super Contributor
timestamp: May 21, 2021, 09:14:06 pm
content: Quote from: vlad777 on May 21, 2021, 08:47:59 pmAre you thinking of Astrophysicist Jocelyn Bell Burnell?https://www.npr.org/2018/09/06/645257118/in-1974-they-gave-the-nobel-to-her-supervisor-now-shes-won-a-3-million-prize

author: vlad777
author_rank: Frequent Contributor
timestamp: May 21, 2021, 09:20:53 pm
content: I don't think so. I think it was a man.Also , everything was by the book. The rules were wierd and the director got the (Nobel ) prize.

author: JustMeHere
author_rank: Frequent Contributor
timestamp: May 22, 2021, 07:29:27 pm
content: Higgs Boson possiblyhttps://en.wikipedia.org/wiki/Higgs_boson

author: penfold
author_rank: Frequent Contributor
timestamp: May 22, 2021, 08:54:39 pm
content: Any more clues? Was it a fairly recent discovery?The trouble is with a lot of particle physics... the results are mostly blips/spikes in a graph (Higgs' maybe more a blip than a spike though) and they mostly rely on big complex experiments and have to share credit.Until we find out the real answer, can I claim to be half-correct and guess Schrödinger?

author: vlad777
author_rank: Frequent Contributor
timestamp: May 23, 2021, 11:21:31 am
content: I figured it out, because I remembered it was about a carbon isotope.Fred Hoyle and Triple-alpha process.
Hoping to find some more old school piezo speakers like this. - Page 1
Forum section: electronics / general

author: XOIIO
author_rank: Super Contributor
timestamp: May 23, 2021, 10:07:17 am
content: Hi all, I have a project I'm working on, and I salvaged some parts from an old alarm panel (unfortunately the case is long gone so no clue who made it).It had this really nice, metal can piezo speaker in it which gave a really nice quality sound, and was very loud, much louder than the standard small, black 5v piezo speaker you see how.Unfortunately however, it ended up dying on me, it seems like something internally started to break causing an intermittent connection, or perhaps it wasn't rated for 5 volts, though that seems unlikely, and its completely hooped now.I love the look of this thing and it fit the aesthetic of this project, but it was also just a nice quality piezo, however I couldn't find any info from the stamped markings on the can, but I figure you guys might know of a spot to find NOS similar ones, or perhaps there are still some in this fashion still being made. I'm sure they wouldn't be cheap, but it tickles my old school appreciation bone.

author: Zero999
author_rank: Super Contributor
timestamp: May 23, 2021, 10:22:01 am
content: How do you know it's a piezo? Magnetic transducers often have similar packages.

author: MIS42N
author_rank: Frequent Contributor
timestamp: May 23, 2021, 10:32:43 am
content: It's not piezo, and I'd say you exceeded 50mW. This on Ebay:Miniature Audio TransducerItem Description:Panasonic - ECG EAF-14R06C Miniature Audio TransducerSpecifications:Rated Input (mw) – 50DC Resistance (ohms) – 15Impedance (ohms) – 45Sound Pressure Level (dB/1 W/1 m) - 93Frequency (Hz) – 2.5K-3KPhysical size (mm) 14x10

author: XOIIO
author_rank: Super Contributor
timestamp: May 24, 2021, 01:06:33 am
content: Ah, interesting, first time hearing about magnetic audio transducers.I did have that resistor on the pin providing power to it, but that was based off of the assumption that it's a piezo, and I think the resistor is more for the capacitance of a piezo than current limiting.I'll order a handful of those so I have some spares for other projects. I'm definitely using it at the top end of the range, but I don't need anything aside from a single tone from it.What value resistor should I be using to protect it from over current at ~5v then? Driving it with the tone function from the arduino worked well so probably just over powered it. Don't really have to worry much about that or impedance with piezos, at least I haven't killed any the couple times I used them. Assuming it's nothing wierd, 500 ohms or a bit higher I think?

author: Zero999
author_rank: Super Contributor
timestamp: May 24, 2021, 10:48:30 am
content: 500 Ohm sounds reasonable. I'd put a 1µF capacitor in series with it, which will get rid of the DC component and any associated heating.

author: tooki
author_rank: Super Contributor
timestamp: May 24, 2021, 01:23:28 pm
content: Quote from: XOIIO on May 24, 2021, 01:06:33 amYou've never heard of speakers before? They’re audio transducers, and they’re magnetic.
500MHz 2G/s scope for cheap? - Page 1
Forum section: electronics / general

author: josh132
author_rank: Contributor
timestamp: May 22, 2021, 07:59:59 pm
content: So ive been browsing ebay... AGAIN. And i found this really interesting scope. They dont say its broken or anything but its really cheap. And for a TDS620 500MHz 2G/s scope thats really strange. The current bid is not $99.95. Is it worth it?https://www.ebay.com/itm/254984896122?hash=item3b5e48be7a:g:ihIAAOSw6z1gpS8m

author: josh132
author_rank: Contributor
timestamp: May 22, 2021, 08:03:47 pm
content: forgot to leave a link. I added it in.

author: nctnico
author_rank: Super Contributor
timestamp: May 22, 2021, 09:51:54 pm
content: You better skip the TDS600 series. Short memory an no peak detect. Better look for a good deal on the TDS500 or TDS700 series. The particular one from the listing is showing a copyright notice from before 1995 which means it almost certainly has leaking electrolytic capacitors which need to be replaced. The good thing is that the leaking capacitors have not caused a failure in the power-on diagnostics. If there are more than 2 power-up diagnostics failures on a TDS500/600/700 series it means the leakage has caused serious damage and chances are high you'll be looking at a lengthy repair job.
Fujitsu Quaderno A4 - Any europe based resellers? - Page 1
Forum section: electronics / general

author: Moriambar
author_rank: Unknown
timestamp: May 21, 2021, 09:12:37 am
content: Hi,I've recently started looking around for some kind of eink tablet of some sort.Seeing some videos on youtube I think that Fujitsu's Quaderno A4 is really awesome and could fit my needs.BUT...unfortunately I only find either ebay sellers or us-based sellers (goodereader).Does anyone know why? Fujitsu is impossible to reach without a product to ask for and their reseller page does not work!I just need someone to buy it from in the EU (well, to see if I can afford it first).Can anyone help?Thanks

author: PlainName
author_rank: Super Contributor
timestamp: May 21, 2021, 05:59:09 pm
content: The Quaderno was my primary target when I was looking to go down this route, but reading between the lines of reviews quickly put me off and I went with other kit. AIUI, Sony previously made one of these but decided to wind up the operation, and Fujitsu used the display from the Sony. Smells of obsoleteness to me...
PERTH - anyone interested in a FREE box of old books? - Page 1
Forum section: electronics / general

author: DTJ
author_rank: Super Contributor
timestamp: May 07, 2021, 04:58:42 am
content: I've got a big box of old books;Electronics text booksSome physics / chem / maths calculus textsSome hobbyist type electronics cook booksA few data booksThey're dated but the fundamentals don't change. Anyone interested in taking them.Pickup from south of the river near Fremantle.

author: TerraHertz
author_rank: Super Contributor
timestamp: May 09, 2021, 03:30:55 pm
content: Is there any chance you could separate out just the Electronics related ones including data books, box them and post them?I'm in Sydney, would pay postage.Edit to add:Speaking of giving away a box of books...I recently saved a pile of Chinese language books from being binned. Can't stand to see books destroyed.I'm told by a Chinese neighbor of mine, that they are a wide range of topics, from famous Chinese historical works, through poetry, well-known literature, to kung fu novels.Pics of them all here:http://everist.org/pics/books/I'm hoping to find someone who'd appreciate these and enjoy reading them. Obviously I can't read Chinese and never will be able to, much as I wish I could. (And btw, now I know the meaning of the sequence ordering pictorgrams and realise I arranged volumes out of order in the photos.)Anyway, these are free to a good home. Preferably pickup in Sydney Sth area, but I could post them if necessary. All in one lot, no selections.The only condition is you have to convince me you can read Chinese, and will cherish and preserve them. No cutting them apart to scan them then binning the remnants. People who do that are barbarians.

author: DTJ
author_rank: Super Contributor
timestamp: May 11, 2021, 05:30:14 am
content: Hi TerraHertz, maybe... I'd much rather just have someone local take the problem away for me.Posting is super expensive - I'm posing a 13kg parcel locally at the moment and Aus Post want $50~ !!!You'd be forking out for books you probably won't want.

author: harerod
author_rank: Frequent Contributor
timestamp: May 11, 2021, 10:06:13 pm
content: Guys, I would love to help you out. Perth to Sydney in a campervan is very high on my bucket list.Unfortunately my travel plans are put on hold for the time being. Looking forward to better days.

author: TerraHertz
author_rank: Super Contributor
timestamp: May 12, 2021, 03:06:50 am
content: Quote from: DTJ on May 11, 2021, 05:30:14 amWell failing that, I'm still interested.QuoteHeh, I gather you haven't paid freight on any large heavy boxes from USA to Australia lately? $50 pfft.Also, it might be better to get a quote from DHL/TNT.QuoteOn the contrary, old electronics books I _do_ want. Think personal historical archive/library. One that actually preserves old books, as opposed to destroying them as soon as no one is watching. (What a lot of libraries actually do.)

author: DTJ
author_rank: Super Contributor
timestamp: May 20, 2021, 02:51:27 am
content: All sorted and gone to a local. Thanks.
corrosion protection wax? on top of hybrid board - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: May 23, 2021, 07:14:42 am
content: I was cleaning out some stuff and I disrupted some kind of thin coating on top of a hybrid. It looks like the traces are covered with some kind of stuff (like a solder resist) but then to take it a step further someone put a thin coat of some kind of weak substance that was peeled off by the ultrasonic cleaner.I want to replace it. what remains of it is a yellowish color. I thought since the bath was 65C, that it may have been some kind of wax. But I am not sure. It is a RF board, paralyene came to mind but I expect it is more durable. I thought maybe someone sprayed wax on it, because it did not flake off, it just kinda.. bunched up, so I noticed ripples, when I rubbed it with my finger it came off, and it feels soft, waxy, rubbery, etc. I think the heat did it. It's very thin, looks better without it to be honest, but I wanted to bring it back.
Chinese Capacitors, an idepth product testing report. - Page 1
Forum section: electronics / general

author: peteb2
author_rank: Regular Contributor
timestamp: May 20, 2021, 10:54:48 pm
content: Apologies if this has already being posted (my searches did not find anything). As a tech plus a hobbiest i have to say i have had nothing but trouble with the range of one hung low branded electrolytics from China based manufacturers. I've basically given up on them & stump up the big bucks, buying the better quality Japanese etc made stuff from a reputable supplier.Sometimes though it might be cost effective to use the stuff supplied from China simply because of being able to save a few bucks during development etc & you are just chasing performance range/tolerances etc etc ...Put your feet up and check this blog out .....https://chinese-electronics-products-tested.blogspot.com/p/assortment-of-electrolytic-capacitors.html
(Solved) Raspberry Pi **400** question - Page 1
Forum section: electronics / general

author: eti
author_rank: Super Contributor
timestamp: May 21, 2021, 03:15:26 am
content: I found the answer:https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=289934&p=1755420#p1755428As you've surmised from the title, this question is pertinent to the AIO (All In One) Raspberry Pi 400 computer - the model where a higher clocked Pi 4 has been designed into a red + white keyboard casing as seen below, not any other model.Does anyone here own the Raspberry Pi 400 (again, not the 4, the 400), as I hear it is missing the EEPROM which stores boot configuration info, where it is present on the Raspberry Pi 4 model. Does this affect the 400's ability to USB boot?Many thanks. Please be as verbose as possible.
Can I connect a USB 3.0 microscope to my phone? - Page 1
Forum section: electronics / general

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 23, 2021, 09:59:04 pm
content: The idea being to use a Samsung S10 as the screen. I have ordered what is claimed to be a USB-C to USB 3.1 cable which is blue, so it's not a USB2.0 adapter, which I already have.I know the usual mouse / keyboard stuff works fine in any phone, but I never tried a USB 3 microscope.Do you think it would work?

author: Halcyon
author_rank: Unknown
timestamp: May 23, 2021, 10:08:43 pm
content: The only way to know for sure is to test it.Samsung and other Android phones support a surprisingly large number of external devices including displays, storage devices, network adapters, even USB floppy drives!I routinely use my Dell laptop dock on my Android phone.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 24, 2021, 07:34:02 pm
content: Is there a word for "there's no reason it can't, but we do it on purpose to be needlessly complex"?

author: Caliaxy
author_rank: Frequent Contributor
timestamp: May 24, 2021, 08:18:22 pm
content: Most likely not, or at least not directly. I bought a cheap endoscope for pipes (camera + LEDs at one end of a 15 ft semi-rigid cable, USB at the other end) advertised to work on any MacOS or Windows computer and on selected Android devices. Android required an app called "OTG viewer" or "OTG endoscope" or similar. There are quite a few of them on Google PlayStore (most of them free). Per seller's advice, I tried a few until I found one which worked on my combination of Android device and camera. I remember the seller mentioning that the endoscope does not work on Samsung phones (but it might have been specific to that camera).Maybe you should ask the seller?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 28, 2021, 04:23:54 am
content: Great, my cable arrived and it's just a blue USB 2.0 connector on the other end.

author: NiHaoMike
author_rank: Super Contributor
timestamp: May 29, 2021, 03:59:56 am
content: Quote from: Alex Eisenhut on May 28, 2021, 04:23:54 amComplain that the item is "not as described" or "not working" and you'll probably end up getting a refund with no return needed. (It might not cost much but it helps to discourage sellers from using that sort of trick.)

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 29, 2021, 02:45:53 pm
content: Oh yeah, already done. I think the keyword is "OTG", cables described as USB 3 OTG seem to have the real USB 3 connector....If the description doesn't show a real photograph of inside the connector, it's suspicious.I finally found a cable where they do show the right connector.In another week or two I'll find out.
Structure collapse in an Israeli synagogue - work of resonance? - Page 1
Forum section: electronics / general

author: Bud
author_rank: Super Contributor
timestamp: May 17, 2021, 02:48:33 am
content: Looks like hundreds of people moving in unison may have created favorable conditions for a resonance so the structure self-destructed?Warning: graphics contentScroll to 1:00https://www.cnn.com/2021/05/16/middleeast/israel-bleacher-collapse/index.html

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: May 17, 2021, 04:44:33 am
content: I'm betting the structure was not properly rated to for the load. If there was resonance, I'd expect the whole structure sway, but I couldn't see anything like that.

author: AlbertL
author_rank: Regular Contributor
timestamp: May 17, 2021, 11:19:52 am
content: Might have been incorrect assembly; perhaps some bracing omitted? The loading doesn't seem beyond what I'd expect bleachers to be designed for.

author: Stray Electron
author_rank: Super Contributor
timestamp: May 18, 2021, 12:32:37 am
content: Quote from: AntiProtonBoy on May 17, 2021, 04:44:33 amI watched the video over and over but I couldn't see any sign of the bleachers swaying but the entire crowd on it was swaying and it was so crowded that I couldn't see the bleachers themselves. I think that, based on the pictures alone, it's impossible to tell of the bleachers were swaying or not.

author: Gribo
author_rank: Frequent Contributor
timestamp: May 18, 2021, 03:11:44 pm
content: The builders used metal wire to attach the beams to each other, no screws, no nails, no brains either. Inspectors warned about this structure 2 weeks prior, and were ignored.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: May 19, 2021, 02:55:21 am
content: Quote from: Gribo on May 18, 2021, 03:11:44 pmwhat a surprise
Ultrasonic cutters - Page 1
Forum section: electronics / general

author: DrG
author_rank: Super Contributor
timestamp: May 16, 2021, 05:38:17 pm
content: I have been thinking about getting one of these very pricey items to make it easier for me to successfully negotiate building enclosures for projects - hobby projects.I have done some due diligence, read a lot and seen some videos.I am considering these two:https://www.micromark.com/Wondercutter- been around for a while and there are some videos out there.More recently, a flood of these have shown up on $bay -https://www.ebay.com/itm/393069929067?chn=ps&mkevt=1&mkcid=28~US$ 100 cheaper. Looks like lower power and absolutely no video reviews that I can find and that manufacturer has lots of other models.Does anyone have some advice? Has anyone actually used any at this level?

author: coppercone2
author_rank: Super Contributor
timestamp: May 18, 2021, 06:52:36 am
content: careful with the cords, the cheap ones literary looked like they use telephone cords, and I am not sure how high the voltage is, they do use a regular telephone jack from the youtube video I watched some time ago (lost it).
electronics work surface for wooden desk - Page 1
Forum section: electronics / general

author: RustyShackleford
author_rank: Regular Contributor
timestamp: May 19, 2021, 05:00:40 am
content: I've built a nice room-wide desk/workbench for computer, digital darkroom, and electronics. To the extent my limited skills allow, it's a pretty nice surface of oak-veneer plywood, so I'd like to not mess it up with solder drips and such. So I'm wondering would be a good second surface for the EE end of the desk ? Anti-static would be nice but not super-critical for me. It should be a material I can cut to fit the area I'm dedicating to EE, probably roughly 40x28".Looking to me like some kind of silicon mat is the way to go, something like:https://www.amazon.com/gp/product/B083SRJ144/ref=ox_sc_act_title_1?smid=A328EBN1BG6NU5&psc=1... though I'd prefer a bit larger (this is the largest I could find).

author: beanflying
author_rank: Super Contributor
timestamp: May 19, 2021, 05:10:07 am
content: There is a jumbo thread to trawl over herehttps://www.eevblog.com/forum/chat/whats-your-work-benchlab-look-like-post-some-pictures-of-your-lab/msg2577009/?topicseen#msg2577009This is my Cork over junk timber. Water based Clear coat is holding up well and the Static Dissapative met is just an Evilbay cheapy likewise holding up well. It is NEVER that clean either

author: David Hess
author_rank: Super Contributor
timestamp: May 19, 2021, 05:11:54 am
content: The work surface I have always liked is a sheet of black anti-static foam. Small leaded parts can be stuck in it to keep them in place.

author: Halcyon
author_rank: Unknown
timestamp: May 19, 2021, 09:56:55 am
content: I just use a cutting mat.https://www.officeworks.com.au/shop/officeworks/p/a2-cutting-mat-ow9358It makes for a very tough surface that's resistant to scratches and doesn't cost an arm and a leg. No idea how good it is for ESD sensitive devices, but for a general all-purpose mat, it works well.

author: RustyShackleford
author_rank: Regular Contributor
timestamp: May 19, 2021, 05:49:16 pm
content: Thanks for the replies, folks, and especially the link to that massive thread. I think I'll go with some kind of mat, looking at these three:https://www.officeworks.com.au/shop/officeworks/p/a2-cutting-mat-ow9358#qandahttps://www.amazon.com/gp/product/B01MDO2BGP/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&th=1https://www.amazon.com/gp/product/B083SRJ144/ref=ox_sc_act_title_2?smid=A328EBN1BG6NU5&psc=1
Ear buds - Page 1
Forum section: electronics / general

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 16, 2021, 10:17:04 pm
content: Here's another stupid interface design. While talking on the phone, I decide to use my bluetooth ear buds. I grab the right one, and as I fiddle to make it fit in my ear, it hangs up the call.Can't there be a 10 second delay between being uncradled and sending touches to the phone while I put them in? What kind of dumb design is this? And again, trying to locate any kind of menu setting about which ear bud registers which press to do what is impossible.I just can't keep up with all these menus and settings changing all the time and defaulting to the stupidest possible behavior.

author: eti
author_rank: Super Contributor
timestamp: May 16, 2021, 11:17:14 pm
content: Quote from: Alex Eisenhut on May 16, 2021, 10:17:04 pmI bet I can find an even MORE stupid interface design for you - my "Tozo T12" wireless earbuds, which a friend kindly gave me, I do NOT use, since they've become a victim of the obsession by modern Chinese "designers" of putting touch interfaces ON EVERYTHING, for no good reason! I listen to live MP3 streamed podcasts 3x a week - now with these in my ear, if I reach up to readjust them for comfort, I end up touching the capacitive touch control surface whcih registers this as a "play/pause" tap, AND THEN I LOSE MY PLACE IN THE LIVE STREAM (it is not pausable!)Arghhh! So they sit in their nice little case doing nothing, and my cheapo "Trust" £10 pair go out with me, which have TACTILE buttons.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 17, 2021, 12:14:27 am
content: In the before time, we had a little port in the phone called an earphone jack. It was quite possible to conduct a phone call normally in one ear whilst placing an earbud in the other. You'd then plug in the cord into the phone and boom. You're off to the races.My other gripe is the company Raycon. All they sell is wireless earbuds. The company is so sophisticated they have been slowly adding different countries to the list in the online shopping cart. They still haven't figured out how to sell to Australia.E-commerce in 8 easy steps:https://www.squarespace.com/blog/how-to-set-up-an-online-store

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 17, 2021, 12:22:34 am
content: I also have the same problem of moving my hair and the earbud detects it. I had a pair of terrible, awful Mobvoi buds where the right earbud could sense the neutrinos in my fingers from 600 feet away, and the left one required The Thing from the Fantastic Four to press on it. Quite interesting.Then of course the batteries die asymmetrically and they are not very user-replaceable. I tried. Not worth it.
Line/choke filter replacement - Page 1
Forum section: electronics / general

author: LiGhTMaGiCk
author_rank: Newbie
timestamp: October 22, 2016, 04:24:49 pm
content: I picked up a used model 3 Sega Genesis(Mega Drive to those not in the US) that was not functioning and found some rust and corrosion. Long story short I cleaned up and repaired some traces and bad solder joints but one component was ruined. It was in line with the power adapter input so I believe it is a line or choke filter. It is labeled "RC 04 T" and I have found a visually matching component referred to as a "CM04RC04" common mode choke filter. As it stands now the Genesis unit will function with this component removed and jumpers put in its place. The component in question is not made any more so it won't be directly replaceable. I would rather have something in its place to take up the same function so if anybody could point me to something closely compatible I would greatly appreciate it.

author: NiHaoMike
author_rank: Super Contributor
timestamp: October 23, 2016, 03:15:12 am
content: Snap a ferrite core on the power cord as close to the unit as possible.

author: LiGhTMaGiCk
author_rank: Newbie
timestamp: October 23, 2016, 01:04:09 pm
content: Quote from: NiHaoMike on October 23, 2016, 03:15:12 amThat's actually what I've already done for a temporary solution but I'd like to get a drop in replacement for the failed component. Of course if it's not gonna be possible then I'll live with it as it is.

author: Ian.M
author_rank: Super Contributor
timestamp: October 23, 2016, 01:26:20 pm
content: All its there for is to keep the FCC off Sega's back by suppressing some of the noise that could be radiated via the power cord so it meets the limits of a FCC Class B digital device. Replacing it with a footprint-compatible part not specified as an exact equivalent, may give you a warm and fuzzy feeling, but does nothing for the FCC without emissions testing. However, if the replacement part has an adequate current rating, is intended for a similar application, you already have it, and the board is in good enough condition to withstand the rework, you might as well fit it, as it *MAY* help with EMC.

author: LiGhTMaGiCk
author_rank: Newbie
timestamp: October 23, 2016, 04:29:50 pm
content: Quote from: Ian.M on October 23, 2016, 01:26:20 pmThat works for me I guess. I just wasn't sure whether it was really necessary or not.

author: sv
author_rank: Newbie
timestamp: May 16, 2021, 07:04:51 pm
content: Came across this thread when I was searching for the same part and thought I'd add an update for posterity's sake. As of May 2021, the CM04RC04T is available for purchase from Quest Components:https://www.questcomp.com/part/4/cm04rc04t/141651187?utm_source=octopart&utm_medium=industry-cpc&utm_campaign=partsearchI purchased a reel of 20 for $40.Also, you can find the Taiyo Yuden datasheet for this part here:https://ds.yuden.co.jp/TYCOMPAS/ut/detail?pn=CM04RC04T++&u=M
Fake diamond manufacturing during WW2 - can't find anything - Page 1
Forum section: electronics / general

author: daqq
author_rank: Super Contributor
timestamp: May 09, 2021, 09:02:51 pm
content: Hi guys,Many years ago I read somewhere something like this:During WW2, some German con artists managed to convince the government (or a branch thereof) that they could manufacture synthetic diamonds. The government funded them, they milked ithard, occasionally providing 'samples' from the process machine using sleight of hand. Eventually some awkward questions were asked. The con artists claimed that the diamond manufacture is just a side effect of some even greater advancement. And before more awkward questions could be asked, they disappeared with a fair amount of resources.This is the rough outline of the story, but I can't for the life of me find anything on the Internet or anywhere else. Does anyone have any leads, know anything? I'm sure I've read it, but the original text could be BS of course.Thanks,David

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: May 13, 2021, 09:48:47 am
content: If you find something, please let us know. Sounds like one hell of a story.Reminds me ofthe 1990s "magic box" video compression scam.

author: nctnico
author_rank: Super Contributor
timestamp: May 13, 2021, 11:12:24 am
content: Quote from: I wanted a rude username on May 13, 2021, 09:48:47 amThis one is far more intriguing:https://en.wikipedia.org/wiki/Sloot_Digital_Coding_System

author: Youthe
author_rank: Newbie
timestamp: May 13, 2021, 12:30:37 pm
content: Diamonds are really quite an interesting item. Would you pay big amounts for something that can be made synthetically withvirtuallyno differences?Although I couldn't find your story on the internet to confirm, i did find this, which was really interesting to read:https://www.ehudlaniado.com/home/index.php/news/entry/the-history-of-lab-grown-diamonds

author: NiHaoMike
author_rank: Super Contributor
timestamp: May 13, 2021, 01:09:21 pm
content: Quote from: nctnico on May 13, 2021, 11:12:24 amThere's an example of "encoding" 15 minutes of video into 64kB:http://www.theproduct.de/I remember in the early 2000s an add on for Internet Explorer that plays TV in a side window at surprisingly good quality for the time, over 56k dial up. My guess is they just used a somewhat more advanced codec than was mainstream at the time. Codecs really have changed a lot over the years.https://goughlui.com/2021/04/23/tech-flashback-digital-video-at-1-2mbit-s-developments-in-video-compression/
Where to buy WellShin connectors? - Page 1
Forum section: electronics / general

author: TBS
author_rank: Contributor
timestamp: May 08, 2021, 01:25:18 am
content: Hello everyone,does anyone know where could one buy a WellShin connectors? (http://www.wellshin.com.tw/en/mod/product/index.php?REQUEST_ID=46889a3a0a28b9acb1acb693ab864c4c&cls=338)Apparently, they are widely used in Eaton UPS products, but I couldn’t find them on eBay, AliExpress, Alibaba or Amazon.I am interested particularly in these:EM-023EM-023-AEM-024EM-024-AThanks.

author: TBS
author_rank: Contributor
timestamp: May 14, 2021, 09:40:43 am
content: Bump? Nobody has any idea or stock?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 14, 2021, 12:18:22 pm
content: http://www.wellshin.com.tw/en/mod/location/index.php
[YouTube] “How I hacked the Apple AirTags” - Page 1
Forum section: electronics / general

author: eti
author_rank: Super Contributor
timestamp: May 13, 2021, 05:59:09 am
content: Just found this, looks fun:

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: May 13, 2021, 09:26:10 am
content: Andthe vulnerability used was published a year ago... Makes you wonder what Apple was thinking ...

author: Gregg
author_rank: Super Contributor
timestamp: May 13, 2021, 08:12:16 pm
content: Quote from: I wanted a rude username on May 13, 2021, 09:26:10 amApple doesn't have to think as they are a fashion marketing company firstElectronics gadgets are just a means for the overall business model

author: m98
author_rank: Frequent Contributor
timestamp: May 13, 2021, 10:16:25 pm
content: And what would a "responsible company" do in their place? Don't use any nr52 chips at all? It's not like Apple could do anything about this vulnerability, except not putting any sensitive information like symmetric keys in the firmware, which should be standard practice anyways.

author: bd139
author_rank: Super Contributor
timestamp: May 13, 2021, 10:21:06 pm
content: Yeah not much they can do.AirTags 2 will have their own core in it probably based on what they are doing. They have built their own silicon after being screwed over by crap like this from suppliers. It's 5G blocks already on the table.

author: thm_w
author_rank: Super Contributor
timestamp: May 14, 2021, 08:43:14 pm
content: The NRF does bluetooth and NFC, so what exactly is the purpose of the larger apple IC?Supposedly BL5 range is up to 200m as it is.Good video.
L@@king for Cloud Storage! Easy Sharing, Easy Backup, Fast! Help? - Page 1
Forum section: electronics / general

author: NeedsPractice
author_rank: Contributor
timestamp: May 14, 2021, 07:02:30 pm
content: Hello,I know there are a couple of threads out there about this but nothing very detailed. I have checked YouTube, official websites, and checked pricing. I am looking for something kind of special and I am not sure if it exists. It may not.What I want is something like Idrive with an Amazon Photos flare to it. I want to backup everything I have to the cloud and then be able to share it with ease. i.e. picture or video. (not necessarly need an account to view the file, however this is not a deal breaker) I also want decent speeds and for everything to not run like a turtle.I have heard that Idrive is great however, they are slow? Is this true? I like Amazon Photos, free unlimited photo storage if you have prime. However, for non-photos i.e. videos and other storage concerns their "cloud storage" can get expensive fast.Anyone found the perfect solution?-fast-great pricing, however not too worried about this-incredible sharing capabilities-updated designed, doesn't feel like I'm in the 90's when using the software-please fill me in on other great benefits not listed here if neededP.S. I have (8TB drives I will already be backing up everything to locally (copied twice). However, I want cloud storage in case house burns down.Look forward to hearing all of the solutions!Thanks!

author: ataradov
author_rank: Super Contributor
timestamp: May 14, 2021, 07:47:00 pm
content: I would consider separating sharing and backup. For backup I personally usewww.rsync.net. There is no UI, it is just a server with storage. You point a backup tool at it and it just does its thing. Most of the files I need backed up, I never want to share.For sharing I use whatever is appropriate for the stuff I want to share. Most of the time I just use my email provider's (fastmail) sharing thingy. It is not fancy, but does the job.
Datasheet: A.S. Microelectronics (= OSI Optoelectronics) Photodiode "AE 9447" ? - Page 1
Forum section: electronics / general

author: Uky
author_rank: Regular Contributor
timestamp: May 13, 2021, 03:57:40 pm
content: Greeting forum members.I am looking for data on a PhotoDiode, type AE9447 once made by A.S. Micro Electronics, Horten, Norway in 1990.Searching for this company takes me to OSI OptoElectronics which manufactures a lot of different types withdifferent names, although some of the packagings looks identical. The one I have does generate a few hundredmillivolts when exposed to indoor light. But if it's performance are optimized for visible wavelengths I do not know.Any member from Norway that can shed "some light" ?

author: amyk
author_rank: Super Contributor
timestamp: May 14, 2021, 12:36:02 am
content: Do you have some pictures? Is 9447 actually a datecode?

author: Uky
author_rank: Regular Contributor
timestamp: May 14, 2021, 07:37:56 am
content: The photovoltaic element is housed in a large gold plated enlarged TO5-can style (but with a diameter of 12 mm). On top of it is a glass lens covering the entire top area. On its bottom, there are three pins: One for grounding the metal case and two for connecting to the photovoltaic element inside. On its side is markings: "AME 9447 9050". The "9050" is obviously the date code, since the ESD-package is marked "Approved 11/12 1990". This package style is used by OSI today in some of its components.
Can you identify this automotive connector? - Page 1
Forum section: electronics / general

author: dcarr
author_rank: Regular Contributor
timestamp: May 12, 2021, 05:10:09 am
content: Hi EEVBlog,I'm working on a vehicle that has a ECU connector that I don't recognize and I'm having trouble locating it on Digikey/Mouser.Do you recognize the 24 pin connector on the left? It's hard to get calipers in there to measure, but my best estimate of the pitch is 2mm.Thank you for the help!
LED Switch, dimmable - LED limit 3W till 35W Load? But what about current?! - Page 1
Forum section: electronics / general

author: PushUp
author_rank: Regular Contributor
timestamp: May 11, 2021, 12:28:40 pm
content: I bought two different "Kopp LED Switches":Kopp 8428: 3W - 35W LED Load, leading-edge onlyKopp 8454: 3W - 100W LED Load, both leading-edge and trailing-edgeIn addition to this I also bought different LED bulbs - my lamp needs two of them:The "technically better" switch 8454 does make more flickering, thus I have chosen the "manually adjustable" dimmer 8428, which officially only takes 35W LED Load max - and here is my problem:11W x 2 = 22W(< 35 W LED Load)17W x 2 = 34W(< 35 W LED Load)0.88A when dimmer on max20W x 2 = 40W(> 35 W LED Load)This gives the best light!!!0.88A when dimmer on maxWhen measuring the current of the 2 x 17W version, it reaches 0.88A max as well as the 2 x 20W version, although having different specs in watt?!However, as the light is much more nicer from the 2 x 20W version, and as it is the same current consumption compared to the 2 x 17W LED dimmable light bulbs, I wonder how to take the LED Load of 35W max into consideration?Power : Volt = Ampere35W : 230V = 0.15 Ampere (This should be the limit of the switch concerning LED Load?!)But I measure 0.88 Ampere with both bulb versions 2 x 17W and 2 x 20W?!I don't want to risk a fire, but cannot explain myself the limitation of the "LED Load" in this respect as the amperage is equal? I haven't opened neither the bulbs nor the switches so far, so that I don't know anything about their circuit protections...Taking protection at first place, I obviously must not use 2 x 17W and not 2 x 20W, regardless of the printing on the bulbs...These are my first LED dimmers, so that any help is appreciated, as I don't have any experiences with them!ThanX!
The remarkable story of Skylab's crash back to Earth  - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: May 07, 2021, 12:26:15 am
content: Interesting to listen to.Montage of Australian radio and TV reports on the re-entry of Skylab in 1979.At 20:18 " I'm calling in from Salmon Gums. " "Which is where ? "

author: Gyro
author_rank: Super Contributor
timestamp: May 07, 2021, 07:32:15 pm
content: Interesting that there are still modern day counterparts. I saw this just this morning - 18 tonnes of Chinese rocket segment on its way down... somewhere tbd on impact!https://www.bbc.co.uk/news/science-environment-57013540
Is There A Way To Upload More Then 15 Videos To YouTube - Page 1
Forum section: electronics / general

author: nvidia
author_rank: Regular Contributor
timestamp: May 16, 2021, 11:40:05 pm
content: is there anyway to be able to upload more then 15 videos every 24hours?

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 17, 2021, 12:01:51 am
content: Quote from: nvidia on May 16, 2021, 11:40:05 pmWhy?If anyone on my sub list put up more than two or three on one day I used to kill the sub.It's annoying.
Losing my mind or my posts - not sure which. - Page 1
Forum section: electronics / general

author: jpyeron
author_rank: Regular Contributor
timestamp: May 02, 2021, 09:04:17 pm
content: I went through my browser history, and I see I did post a question about a data sheet about 18 hours ago. It was titled "Looking for the Standex LG100-1-5 reed relay datasheet"I later replied to the thread with the more information I found.Now it is gone.Is it me?

author: Gyro
author_rank: Super Contributor
timestamp: May 02, 2021, 09:08:12 pm
content: No, it's not you. A fair number of threads / posts have gone missing today!

author: jpyeron
author_rank: Regular Contributor
timestamp: May 02, 2021, 09:10:14 pm
content: is there a thread discussing it?

author: jpyeron
author_rank: Regular Contributor
timestamp: May 02, 2021, 09:12:29 pm
content: Yes - see page 19+https://www.eevblog.com/forum/chat/website-error-reports/450/

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: May 02, 2021, 10:24:21 pm
content: The message database has been restored from backup, probably the best part of a day old.This doesn't preclude the possibility of you also losing your mind though.

author: Halcyon
author_rank: Unknown
timestamp: May 02, 2021, 11:21:05 pm
content: Dave is working on it.

author: jpyeron
author_rank: Regular Contributor
timestamp: May 08, 2021, 11:35:53 am
content: Quote from: I wanted a rude username on May 02, 2021, 10:24:21 pmmeh - I guess it was in the "window" and I have to repost it.
RCA  TR-4  Video Tape Recorder 1966 Promo Film - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: May 02, 2021, 10:19:35 pm
content: Interesting video from RCA on the TR-4.Goes into pretty good detail on the design, operation and construction.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 04, 2021, 05:02:04 am
content: I'd love to tool around inside one of these.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 04, 2021, 05:25:06 am
content: If you wanted to be a fly on the wall during recording ...https://youtu.be/mfsE_C-7jv4?t=1360
May the forth be with you - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 03, 2021, 08:09:22 pm
content: Live long and prosper.

author: floobydust
author_rank: Super Contributor
timestamp: May 03, 2021, 08:45:48 pm
content: May 4th Star Wars Day is tomorrow, or are you referring to the programming language?Four is pronounced Si in chinese, the same as 死 (death). I'm celebrating the commie leaving the forum. Long overdue. Too bad that resulted in a corrupted database.

author: JohnnyMalaria
author_rank: Super Contributor
timestamp: May 03, 2021, 08:52:13 pm
content: Quote from: floobydust on May 03, 2021, 08:45:48 pmWell, "live long and" does have a reverse Polish feel to it.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 03, 2021, 09:03:23 pm
content: Quote from: floobydust on May 03, 2021, 08:45:48 pmIt's already tomorrow here.
Convolution Question - Page 1
Forum section: electronics / general

author: Cujo
author_rank: Regular Contributor
timestamp: May 03, 2021, 05:13:27 am
content: How do I solve this convolution question? Thank you.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: May 03, 2021, 01:57:13 pm
content: Substitute the operands into the definition and integrate.Tim

author: Cyberdragon
author_rank: Super Contributor
timestamp: May 03, 2021, 04:56:19 pm
content: We're not here to do your homework.However, we can build a computer to do it for you.