hybridfree/eevblog-posts huggingface dataset:
What to do with Sonos Playbar? - Page 1
Forum section: electronics / general

author: John B
author_rank: Frequent Contributor
timestamp: May 29, 2025, 10:25:10 pm
content: I scored a free unit, and I'm figuring out how to re purpose it. As I understand, this brand exemplifies a locked down ecosystem in that you need to use an app to control the speakers, which requires you to have an online account.Of course, I will grind this unit to dust before I do any of that. So I am wondering if there has been any success in turning these into independent units? The ideal would be to run a different firmware, and use the existing power amps. Since it's a speaker array, I imagine there was a fair bit of configuration in equalisation and speaker phasing.

author: Analog Kid
author_rank: Super Contributor
timestamp: May 29, 2025, 10:33:03 pm
content: I wish I could help you here, but I can't.Just stopped by to say that my interest in Sonos is in the quality of their audio reproduction. There's a local store that has a Sonos unit sitting on the shelf and I'm always impressed by the quality of the sound that comes out of that little box. Wouldn't mind scoring one myself so I could look at least at the audio amp & speaker system. (Class D I'm guessing?)

author: tom66
author_rank: Super Contributor
timestamp: May 29, 2025, 10:51:33 pm
content: Sonos kit can be locally controlled - there are things like Home Assistant integrations. You'd probably need a 'cloud account' to pair it, but I think you can delete that once you're done with pairing it onto your wireless network. Haven't tried it myself as I don't own any myself, but the real power of Sonos stuff is the multiroom behaviour, it can segue from one speaker to another, or keep all speakers in a home in sync over a wireless network, so it -has- to be doing most of this stuff locally as most internet connections would have too much jitter and unreliability.https://www.home-assistant.io/integrations/sonos/

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 30, 2025, 08:34:40 pm
content: Ah that's why Goodwills are flooded with these

author: thm_w
author_rank: Super Contributor
timestamp: May 30, 2025, 10:39:18 pm
content: Need photos of what you are talking about.Easiest solution:
Can you help identify these caps - Page 1
Forum section: electronics / general

author: seavan
author_rank: Contributor
timestamp: May 29, 2025, 03:01:55 pm
content: Mouser sent these capacitors to me by mistake and does not want them back. I think these are likely 2u2 250V, but I did not find anything similar on Mouser. Any idea?

author: squadchannel
author_rank: Frequent Contributor
timestamp: May 29, 2025, 03:10:29 pm
content: B32562J3225K000B32562H3225K000B32562H3225J000

author: seavan
author_rank: Contributor
timestamp: May 29, 2025, 07:37:53 pm
content: Thank you! I think it's exactly right. My mistake was - I thought it was MLC.
amusing picture of chassis grounding in action - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: June 01, 2025, 07:42:16 am
content: https://imgur.com/gallery/color-changing-bolt-nut-KSn8eo2Good reason to study fasteners as EE and to take 'creative' (low cost) chassis hardware decisions with more then a grain of salt

author: tggzzz
author_rank: Super Contributor
timestamp: June 01, 2025, 08:11:52 am
content: ... for examplehttps://www.eevblog.com/forum/chat/whats-this-component-462724/?Unpleasant, but not in the same way

author: temperance
author_rank: Super Contributor
timestamp: June 01, 2025, 10:17:56 am
content: That's is not a problem with the bolts but with the mains wiring. The installation doesn't seem to have a GFCI.

author: coppercone2
author_rank: Super Contributor
timestamp: June 01, 2025, 10:47:49 am
content: what I mean is that it shows that the chassis is a conductorand of course it could be a broken GFCIAs for the electrical working as intended, I am not sure how they engineered it to handle fault currents and if its performing to spec (not my area of expertise). I suppose its not dripping steel, which is a plus. If it started dripping molten metal to the outside and started another fire that would sure be interestingThe bolt glowing near the electrical fire inside of the machine is I guess... reasonable?, the rando bolt glowing on top of the machine.. far away from the fire.. with another bolt near it that is closer to the fire and not glowing and bolted to what looks like the same thing... hmm that one is making me think

author: AVGresponding
author_rank: Super Contributor
timestamp: June 02, 2025, 05:21:04 am
content: Quote from: coppercone2 on June 01, 2025, 10:47:49 amProbably where an earth bonding strap is attached

author: Jeroen3
author_rank: Super Contributor
timestamp: June 02, 2025, 05:50:06 am
content: Quote from: temperance on June 01, 2025, 10:17:56 amWhat do you mean, that's obviously an ground fault circuit indicator.

author: coppercone2
author_rank: Super Contributor
timestamp: June 02, 2025, 06:28:50 am
content: Quote from: AVGresponding on June 02, 2025, 05:21:04 amShould the earth grounding point be glowing when its under SC condition though?I am thinking that what could happen is if the system is like robust enough to supply that current, eventually it will get destroyed and float.

author: Jeroen3
author_rank: Super Contributor
timestamp: June 02, 2025, 06:42:32 am
content: I do not recognise the connector. But I do see 3 leads going into the connector, suggesting a delta setup. Or perhaps it is not, and earth fell off causing the indicator bolt to illuminate.480V is often used on ships, I am not very familiar with ship distribution. But sometimes ships run a floating delta network with fault monitoring. Meaning the system is tolerant toonefault.

author: Refrigerator
author_rank: Super Contributor
timestamp: June 02, 2025, 08:39:36 am
content: Very thoughtful of them to install light emitting fasteners that indicate excess current flow in a very visible and easily discernable way.
Anyone ever used sensefuture products? (temperature and laser products) - Page 1
Forum section: electronics / general

author: PascalNE
author_rank: Regular Contributor
timestamp: May 25, 2025, 12:56:28 am
content: Hello,I've recently been wanting to make a temperature controlled chamber for coefficient testing. So I need a TEC controller I came acrosshttps://www.sensefuture.com/products/3a-high-precision-temperature-controller?it claims an accuracy of +-0.01c for only $135 which seems pretty cheap compared to equivalent products. They also have a version that claims to have +-0.001c temperature stability which seems very good.So if anyone has ever used it or verified their claims please let me know.Thanks, Pascal

author: Someone
author_rank: Super Contributor
timestamp: May 25, 2025, 01:46:22 am
content: Quote from: PascalNE on May 25, 2025, 12:56:28 amPrecision /= AccuracyAll their specifications are around drift/stability rather than accuracy (as would be expected of an NTC sensor).

author: coppercone2
author_rank: Super Contributor
timestamp: May 25, 2025, 01:52:26 am
content: the hall mark of ntc is their sensitivity

author: PascalNE
author_rank: Regular Contributor
timestamp: May 25, 2025, 09:26:09 am
content: Quote from: Someone on May 25, 2025, 01:46:22 amYes apologies I did know that I just didn't check over my post. For my application stability is mostly what matters. I can always have a pt1000 to measure the actual temperature. And still equivalent products seem to be more expensive generally.

author: PascalNE
author_rank: Regular Contributor
timestamp: May 28, 2025, 10:56:24 am
content: A quick warning about the sensefuture website they have just raised their prices so now the TEC103L (+-0.01) costs $168 however I just discovered their taobao page where the same product costs 540yuan or $75!The TEC103(+-0.001) now costs $328 where as on taoboa it costsjust $130 so way less than half!So if anyone sees this and plans to buy one here is the linkhttps://shop108216074.world.taobao.com/
Chinese robot try to kill its developer with a karate neck whack! - Page 1
Forum section: electronics / general

author: RoGeorge
author_rank: Super Contributor
timestamp: May 22, 2025, 01:53:28 pm
content: Well, that was a lie.The explanation is at minute 7:00 in this video (some fancy dancing moves were uploaded without proper training, and the robot lost its balance):AI Robot Goes BERSERK on Engineers in Leaked Chinese Lab Footage | Unitree Glitch, Attack or Skynet?Kalil 4.0https://youtu.be/uQ8ehsA4nS0?t=420

author: UnijunctionTransistor
author_rank: Frequent Contributor
timestamp: May 22, 2025, 04:23:14 pm
content: I also agree, clickbait. Most likely this was only an incorrect setup or programming.But to get additional clicks, the person who uploaded the video makes it look like a Frankestein going berserk on its maker.

author: SiliconWizard
author_rank: Super Contributor
timestamp: May 22, 2025, 10:37:34 pm
content: You may want to have a look at this to instill some common sense:

author: rdenney
author_rank: Regular Contributor
timestamp: May 29, 2025, 02:11:57 pm
content: The only difference between a dance program that got out of hand and a purposed attack by a newly sentient and malicious robot is the purpose part, but the guy that gets whacked by one one of those flailing arms may not appreciate the distinction.Power tools are dangerous because they are power tools. Their ability to multiply effort means the ability to do damage, even if unintentional. The table saw didn't know it could cut off my hand, but there I am arterially bleeding anyway.The more apparently frivolous the task, the less likely the program directing the task will include the safety protocols necessary for a tool with such power. The guy designing an attack robot for military use will probably be required to spend 100 hours on safety protocols for every hour on attack effectiveness, while the guys programming their robot with dance moves--well, we see how that turned out.Rick "all this was covered in Robocop" Denney
Rework station (Hot air station) temperature measuring topology - Page 1
Forum section: electronics / general

author: Els_Chaos
author_rank: Regular Contributor
timestamp: May 26, 2025, 09:26:00 am
content: Hi everyone,I'm trying to diy a rework station for myself using jelly bean mcu like atmega328pa. While reviewing some commercial product's schematics, i dont understand how does it work.From my perspective, i am planning to using discrete instrument amplifier (since i dont have much budget to Max6675 or so) which maybe provide better noise rejection and high input impedance. Because of low cost DIY, accuracy isnt a problem.But the commercial ones, why it does have R7 pull up resistor and a voltage offset created by R9 R8 and VR1?Could you explain how to measure K type sensor for me?

author: thm_w
author_rank: Super Contributor
timestamp: May 26, 2025, 09:44:23 pm
content: R7 can be a safety mechanism, if the thermocouple is broken or disconnected then the input will pull high and the output will read maximum voltage.R6 C4 for filtering.Not sure what the trimmer pot is for, maybe to calibrate offset due to the LM358 having poor spec.I would recommend not using LM358, instead using something like OP07, which is commonly used in soldering stations. Or finding an equivalent clone on LCSC.https://blog.junix.in/2018/12/24/thermocouple-amplifier-with-op07c-op-amp/
Lidar scanner burned iPhone camera - Page 1
Forum section: electronics / general

author: Bud
author_rank: Super Contributor
timestamp: May 25, 2025, 02:06:50 pm
content: A stunning video shows a car's Lidar burning pixels in iPhone camera in real time ! Wow.https://www.theverge.com/news/674173/what-happens-when-you-try-to-film-a-lidar-scanner

author: Grandchuck
author_rank: Super Contributor
timestamp: May 25, 2025, 03:10:06 pm
content: https://www.eevblog.com/forum/chat/volvo-lidar-damages-camera-sensors/

author: Halcyon
author_rank: Unknown
timestamp: May 26, 2025, 02:24:59 am
content: Locked due to duplicate post. See other thread above.
Diode I.D. - Page 1
Forum section: electronics / general

author: Hifi Necromancer
author_rank: Contributor
timestamp: May 15, 2025, 08:48:10 pm
content: I found a tape with several hundred of these glass diodes and I'm not sure what they are, nor did I purchase them. They're marked with yellow and black bands as well as a "4" printed on the package. Vf measures .68v @5mAAny ideas? If I had to guess based just on the quantity I'm thinking 1N4148.

author: Dave Wise
author_rank: Regular Contributor
timestamp: May 17, 2025, 02:50:16 am
content: What you call "4" looks like the Fairchild "F" logo to me. The parts may have been made for a customer, in which case you will probably never know the color bands' meaning. I'd use them wherever a generic part would work.If someone has a real decode, I'll be delighted to hear it.

author: RoGeorge
author_rank: Super Contributor
timestamp: May 17, 2025, 08:25:19 am
content: That F (from Fairchild) is not a 4. Search for 'Fairchild diode color code' rings, maybe you are lucky to find the color codes in some datasheet. By the length/diameter ratio, they seems a little thick for 1N4148, but I'm not very sure.I would also try to polarize them in reverse, with a current limiting series resistor, to see if they are normal diodes, or Zener.Another possible test would be to check for reverse recovery time, with a square wave generator and an oscilloscope. This will tell if they are switching diodes, or rectifier diodes, or maybe something else, like varicap diodes.

author: NiHaoMike
author_rank: Super Contributor
timestamp: May 17, 2025, 12:55:09 pm
content: I would say a Zener is most probable. I haven't seen any high voltage (>100V) diodes in that sort of packaging and at lower voltages, typically a Schottky would be used if fast recovery is desired.
ST67W (STM32 Wifi/BT companion chip): Has anyone gotten sample or datasheet? - Page 1
Forum section: electronics / general

author: BreakingOhmsLaw
author_rank: Frequent Contributor
timestamp: May 20, 2025, 08:20:51 am
content: After announcing the ST67W in the beginning of december 2024, hardly any information is available. Some dev boards were shown atembedded world, but since then, they are awfully silent.Samples were announced for Q1 25, release for Q2 2025. But as of today, I cant apply for samples, there's not even a preliminary datasheet available.I'd like to include it into a design, but I get the impression this is going to be vaporware. Has anyone gotten their hands on one?
Bourns 3590S fakes - Page 1
Forum section: electronics / general

author: BradC
author_rank: Super Contributor
timestamp: May 18, 2025, 09:55:59 am
content: G'day all,Has anyone seen a teardown of a Bourns 10 turn pot vs a fake? I have some 3590S here that given what I paid, where they came from and how they perform are clearly fakes (mostly good enough though). I've been cruising the net looking for someone having done a teardown or side by side but have turned up nothing. Maybe my google-fu is getting weaker as I age.Does anyone have a lead on something? I'd do one myself but I'm not keen to tear into a $50 pot, don't have a youtube account and nobody would want to hear my voice anyway.

author: amyk
author_rank: Super Contributor
timestamp: May 18, 2025, 10:46:02 pm
content: Here's a fake one:https://www.eevblog.com/forum/chat/fake-bourns-10-turn-potentiometer-tested-to-failure/
New silicon free transistor from China - Page 1
Forum section: electronics / general

author: Picuino
author_rank: Super Contributor
timestamp: May 16, 2025, 08:39:14 am
content: Simple hype or new future?Original article:*Low-power 2D gate-all-around logics via epitaxial monolithic 3D integrationNews about it:*China unveils silicon-free transistor outpacing Intel, TSMC, and Samsung*Chinese researchers develop silicon-free transistor technology, claimed to be fastest and most efficient ever*Peking University Develops Silicon-Free Transistor, Bypassing Chip Restrictions*China’s new silicon-free chip beats Intel with 40% more speed and 10% less energy

author: Zero999
author_rank: Super Contributor
timestamp: May 16, 2025, 09:28:05 am
content: Great, now where can I get one?

author: Simmed
author_rank: Frequent Contributor
timestamp: May 16, 2025, 09:40:33 am
content: bismuth oxyselenide appears to be much much more expensive than silicon is it not ?
Videos!! Tektronix Factory Surplus Store Yes, it is Still Open..   - Page 1
Forum section: electronics / general

author: KG7AMV
author_rank: Frequent Contributor
timestamp: May 17, 2025, 07:19:01 am
content: Here are the Details Days and HoursA Look Inside..As a Data I/O 288 IC Chip Programmer Geek.. Score...https://www.youtube.com/shorts/WcFhrJRQ6RwLive Saturday the 17th 9am Pacific Time to Check out the surplus haul. its not a lot...https://www.youtube.com/live/33D8S3MGMEo
Li-Ion Battery : State of Charge (SoC) - Page 1
Forum section: electronics / general

author: John-O
author_rank: Contributor
timestamp: May 13, 2025, 10:03:40 pm
content: On request, I bought a Honda Motocompacto electric scooter for a South-African friend here in the USA - they cant get them there.I warned him exporting the battery will be a problem, but he assured me he got it under control.Fast forward - I had to remove the battery and ship the scooter.Now we are trying to ship him the battery.I found company here in Texas that will package and ship the battery, but they require a State of Charge confirmation - the battery must be below 30% charge, otherwise they wont ship it.I am now struggling to locate a company that is able to check the SoC and provide me a printout/written confirmation.Local battery shops have no idea what I am talking about, or unable to test for SoC.Any ideas or suggestions will be highly appreciated.(see photo of battery attached)

author: thm_w
author_rank: Super Contributor
timestamp: May 13, 2025, 10:23:34 pm
content: Discharge to 35 or 36V and that will be 0 to 30% capacity.Are you saying ship from Texas to South Africa?There are services that you can use yourself to do this as well, AFAIK, but you have to meet the packaging and labeling requirements. 234Wh is too high to go on a passenger plane.

author: John-O
author_rank: Contributor
timestamp: May 14, 2025, 01:43:07 pm
content: Quote from: thm_w on May 13, 2025, 10:23:34 pmThey wont take my word for it - they require a report/receipt from a company who is able to check it.We are using a service that gives you self packing options, but the buddy opted to use their full service.

author: thm_w
author_rank: Super Contributor
timestamp: May 14, 2025, 09:40:36 pm
content: Quote from: John-O on May 14, 2025, 01:43:07 pmDoesn't exist. You can either write up something yourself and include the voltage measurement, or find another service.Shipping companies are usually good at refunding you if you cancel or modify the shipment.
Is this an (old) solid state relay?? - Page 1
Forum section: electronics / general

author: Chris Wilson
author_rank: Super Contributor
timestamp: May 13, 2025, 07:50:46 pm
content: In a steam cleaner I am checking out, I suspect it's an old solid state relay, I expected a timer relay but I think I have ID'd that elsewhere. I hope the phone camera photo is good enough to show the worn text and schematic. The machine itself is almost certainly Italian.As an aside the machine has two capillary tube thermostats, but instead of the control knobs being on each thermostat the single control knob is remote on its own "box" and connects to both thermostats remotely, hard wired. Anyone come across this sort of arrangement?Thanks for any help.

author: Poroit
author_rank: Frequent Contributor
timestamp: May 14, 2025, 07:54:45 am
content: G'day Chris,It looks like an SSR type with those two SCR's back to back.If your thermostat has two capillary tubes(Instead of one like the attached) then maybe it is for setting a Differential Temperature.

author: squadchannel
author_rank: Frequent Contributor
timestamp: May 14, 2025, 10:34:24 am
content: probably Syrelec SCS timer relay. marking is worn out, dont know specs.

author: Haenk
author_rank: Super Contributor
timestamp: May 15, 2025, 05:10:17 am
content: Syrelec is a good start for a google search
Location tracking in Ai and HPC chips from now on - Page 1
Forum section: electronics / general

author: u666sa
author_rank: Frequent Contributor
timestamp: May 13, 2025, 12:13:56 am
content: https://www.tomshardware.com/pc-components/gpus/u-s-inks-bill-to-force-geo-tracking-tech-for-gpus-and-servers-high-end-gaming-gpus-also-subject-to-trackingThe bill authorizes the Secretary of Commerce to verify the ownership and location of regulated processors and systems after export and maintain a centralized registry of current locations and end-users.

author: Analog Kid
author_rank: Super Contributor
timestamp: May 13, 2025, 12:20:45 am
content: Techno-fascism at its finest.We're fucked. Doomed.

author: themadhippy
author_rank: Super Contributor
timestamp: May 13, 2025, 12:31:06 am
content: Cant have the commies being able to play GTA6

author: RoGeorge
author_rank: Super Contributor
timestamp: May 13, 2025, 06:47:14 am
content: Never heard of Senator Tom Cotton before (I'm not familiar with the USA politicians), so I've looked up the Wikipedia page, to learn who's side the senator is:QuoteThe above quoted text is from today's Wikipedia page:https://en.wikipedia.org/wiki/Tom_Cotton

author: u666sa
author_rank: Frequent Contributor
timestamp: May 13, 2025, 01:06:48 pm
content: Quote from: RoGeorge on May 13, 2025, 06:47:14 amThomas Bryant Cotton (born May 13, 1977) is an American politician and Army veteran serving since 2015 as the junior United States senator from Arkansas. A member of the Republican Party, he is the chairman of the Senate Republican Conference and third-ranking Senate Republican. He also chairs the Senate Intelligence Committee.In May 2006, Cotton was deployed to Baghdad as part of Operation Iraqi Freedom (OIF) as a platoon leader with the 101st Airborne Division. In Iraq, he led a 41-man air assault infantry platoon in the 506th Infantry Regiment, and planned and performed daily combat patrols. In December 2006 Cotton was promoted to first lieutenant and reassigned to the 3rd U.S. Infantry Regiment (The Old Guard) at Fort Myer in Arlington, Virginia, as a platoon leader.From October 2008 to July 2009,[citation needed] Cotton was deployed to eastern Afghanistan. He was assigned within the Train Advise Assist Command – East at its Gamberi forward operating base (FOB) in Laghman Province as the operations officer of a Provincial Reconstruction Team (PRT), where he planned daily counter-insurgency and reconstruction operations.Harvard.Wiki article is ginormous.https://en.wikipedia.org/wiki/Tom_Cotton
Sony Trinitron KV-3000R $10,000 in 1981 - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: May 12, 2025, 12:15:05 am
content: Random YouTube find.Interesting look at a $10,000 Sony TV from 1981.

author: tom66
author_rank: Super Contributor
timestamp: May 12, 2025, 12:09:56 pm
content: Kinda crazy what counted as luxurious back then - wooden cabinet, grand style...Now what does a $10,000 "luxury" TV look like? Probably something like an 83" OLED TV, with nearly no frame to be seen, a plastic remote control and a normal user interface. But it's -bigger-, and some designer who is famous put his name on it, so more money please.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 12, 2025, 01:24:58 pm
content: On a related note - cool story of rescuing possibly the last of the largest Trinitron monitor ever made from japan

author: coromonadalix
author_rank: Super Contributor
timestamp: May 12, 2025, 02:19:54 pm
content: that was a good video storyman i played in theses oldies ...Sony are peculiar, they look like tv's but man their circuitry is something else,on some circuit(s), if they say xxxx model of transistor, don't even think to subs it with something elseZenith System 3 space command, they weighted a ton too, 2 guys to carry themSony 3 tubes projectors, boy they took long time to calibrate, around 32 trimmers in theses ...ahh souvenirs

author: themadhippy
author_rank: Super Contributor
timestamp: May 12, 2025, 02:41:38 pm
content: QuoteSame with the ole barcos,ah the fun and games of trying to get to 2 or 3 lined up

author: Halcyon
author_rank: Unknown
timestamp: May 13, 2025, 07:41:49 am
content: *subscribed*Really interesting video. His house looks very interesting as well. At first I just thought he liked really ugly carpets, until I realised his entire house is preserved in the 1980's.

author: nctnico
author_rank: Super Contributor
timestamp: May 13, 2025, 10:13:23 am
content: Quote from: Halcyon on May 13, 2025, 07:41:49 amThat reminds me of a visit to the 'DDR museum' in Berlin. They have all these funky looking every day items and then it dawned to me: I'm looking at 1980's stuff! There is nothing special about it.
Wavetek-test-equipment@groups.io - Page 1
Forum section: electronics / general

author: ME
author_rank: Frequent Contributor
timestamp: May 15, 2025, 09:13:01 pm
content: Ive tried posting on there for a few weeks , I says message will be posted when the modderator approves it, nothing of mine ever seems to get posted,have the mods fell off of there perch?,seems the groups owners have dropped the ball!.
Datasheet Catalog.com issue? - Page 1
Forum section: electronics / general

author: orbiter
author_rank: Frequent Contributor
timestamp: March 21, 2013, 12:31:31 pm
content: Anyone know what's up withhttp://www.datasheetcatalog.com/.I can't access any of their .pdf's

author: david77
author_rank: Frequent Contributor
timestamp: March 21, 2013, 12:38:51 pm
content: Same here, has stopped working sometime yesterday.I wouldn't worry too much, they have these kinds of problems quite often. In the past they've always recovered.

author: orbiter
author_rank: Frequent Contributor
timestamp: March 21, 2013, 01:26:47 pm
content: Yea I noticed it having problem yesterday tooHope they sort it quite quickly as that site is the one I use the most. Most of the other sitesare a pain in the ar*e to get info from.

author: Devlop
author_rank: Newbie
timestamp: May 13, 2025, 05:04:58 pm
content: Can you please confirm.the datasheetcatalog.com website is having problems or has been offline for some time and I didn't notice?

author: Steffen
author_rank: Regular Contributor
timestamp: May 13, 2025, 08:17:13 pm
content: I have the same issue here too.Many weeks ago the site did not even have had a valid SSL certificate. Strange, because the site used Let's Encrypt. Obviously some renewal did not work.
Component identification please - Page 1
Forum section: electronics / general

author: Coordonnée_chromatique
author_rank: Frequent Contributor
timestamp: May 03, 2025, 07:43:51 pm
content: Hello,Can you say what it is please ?NE5532 ?

author: Andy Watson
author_rank: Super Contributor
timestamp: May 03, 2025, 08:01:47 pm
content: If it has 8 pins it's probably a dual, low noise BJT op-amp with a bandwidth of 10MHz. A decent op-amp ... 40 years ago.

author: Coordonnée_chromatique
author_rank: Frequent Contributor
timestamp: May 04, 2025, 06:46:12 am
content: Quote from: Andy Watson on May 03, 2025, 08:01:47 pmThanks, i've opened a low cost prosumer DSP that some "audio enthusiasts" find a little "cold sounding".It seems excellent to my ears, so i decided to open it to see if there is some apparent signs of quality (i know it mean nothing) and it seems very well constructed and durable, a 5532 seems perfectly matched with a 112dB "rated" DAC IMHO.You can clic on the image

author: Coordonnée_chromatique
author_rank: Frequent Contributor
timestamp: May 06, 2025, 11:10:58 am
content: There is no one for a confirmation bias !My lovely DSP is BS :'(

author: u666sa
author_rank: Frequent Contributor
timestamp: May 06, 2025, 11:54:46 am
content: Quote from: Coordonnée_chromatique on May 03, 2025, 07:43:51 pmHehehttps://www.ti.com/product/NE5532/part-details/NE5532DR

author: u666sa
author_rank: Frequent Contributor
timestamp: May 06, 2025, 12:02:51 pm
content: OP, unless that opamp is dead, I don't think that's your problem. That capacitor in photo looks suspicious. It could be just a bad photo, of course. But, I'd start by checking all the caps around the opamps.

author: Coordonnée_chromatique
author_rank: Frequent Contributor
timestamp: May 06, 2025, 07:13:31 pm
content: Quote from: u666sa on May 06, 2025, 12:02:51 pmThere is some screw locking paint on the capacitor, the DSP is working perfectly, thanks.
RFDEVICES - Page 1
Forum section: electronics / general

author: Lango1818
author_rank: Contributor
timestamp: May 06, 2025, 06:22:58 am
content: HiI was recently given a couple of old switch-mode down converters out of Telecom somewhere. They were made be RF devices and converted 48 volts DC to 24 volts DC at 20 Amps. Being an X Telstra worker, I cannot recollectwhat these were used for. However I googled RFDEVICES (was based in Sydney in 1993) and like many Australian companies it seem to have gone the way of the dinosaurs. Anybody have any memories of these devices.
Metal Detectors - Page 1
Forum section: electronics / general

author: hwasti
author_rank: Contributor
timestamp: May 05, 2025, 02:26:09 am
content: Can anyone recommend a decent metal detector?I am looking for something more than a hobbyist toy, but not terribly expensive, and not very hard to use for a complete beginner.Thanks in advance!

author: aargee
author_rank: Frequent Contributor
timestamp: May 05, 2025, 06:36:01 am
content: Have a look at the Minelab hobby range, Go Find/Vanquish.

author: Haenk
author_rank: Super Contributor
timestamp: May 05, 2025, 07:22:42 am
content: XP DEUS, Garrett*Don't* buy some cheap crap - those are really unusable. Buy some branded stuff. I'd say 300EUR/USD gets you a "good enough" basic device.Invest 100 in a pinpointer as well.And remember: It often is not a matter of the detector you use, it's about working the "right spot" and also good technique. And endurance, endurance, endurance.

author: Poroit
author_rank: Frequent Contributor
timestamp: May 05, 2025, 07:33:47 am
content: This is what they use in Gold prospecting areas in Oz.https://prospectorspatch.com.au/

author: u666sa
author_rank: Frequent Contributor
timestamp: May 05, 2025, 12:16:31 pm
content: Buy same hardware army uses for finding mines. Mines often are made of plastics, so you'd have to look for explosives which contain trace amounts of metals. That's some sensitive stuff.https://detsys.ru/catalog/minoiskateli/?srsltid=AfmBOopygCAb6QUVa20VoJ3MK11hKPsB-tBEF2nFBrd07iQ5mD_Up8TpI remember during Olympic games detection thing that you go through at train station, went off. I had nothing on me. No belt. Nothing metal. Just a pack if cigarettes. It reacted to stuff that is in cigarettes. Put cigarettes on the tray and went through it again, and it was fine.

author: langwadt
author_rank: Super Contributor
timestamp: May 05, 2025, 12:30:47 pm
content: Quote from: u666sa on May 05, 2025, 12:16:31 pmmines usually have metal parts in the trigger mechanism, most countries have banned the use of "undetectable" mines that contain no metal.it's the metal foil wrapper in pack, not the cigarettes that trigger the detector

author: Haenk
author_rank: Super Contributor
timestamp: May 05, 2025, 01:18:45 pm
content: Quote from: u666sa on May 05, 2025, 12:16:31 pmI'm not sure how good those russian detectors are, but to my knowledge *nobody* (except the army itself) uses army detectors - even if they can be obtained rathjer cheaply.I assume they lack the discrimination technology to ignore iron, select only gold/silver and so on - likely a feature not needed and wanted when detecting mines.

author: u666sa
author_rank: Frequent Contributor
timestamp: May 05, 2025, 02:06:53 pm
content: Quote from: Haenk on May 05, 2025, 01:18:45 pmThey are anything but cheap. They will be from military segment of industrial hierarchy. Industrial hierarchy: military space -> civilian space -> military -> industrial -> consumer.Cheaper versions might eventually make it down to consumer market.
Can this Power Bank power a 30W led lamp for camera? - Page 1
Forum section: electronics / general

author: FoxAdriano
author_rank: Contributor
timestamp: May 09, 2025, 01:11:36 pm
content: Good morning, can you please tell me if this Power Bank can power (turn on) a 30 watt led lamp for camera?https://www.amazon.it/dp/B08CKLBQHG?ref_=ppx_hzod_title_dt_b_fed_asin_title_0_0The led lamp is this:https://www.amazon.it/Bi-Color-2700K-6500K-Montaggio-Magnetico-Controllo/dp/B0DD7215LM?ie=UTF8&th=1If it can't do it, can you recommend a travel one?1000 Thanks

author: tooki
author_rank: Super Contributor
timestamp: May 09, 2025, 02:51:24 pm
content: No, that power bank won’t work — the light needs 41W input (using USB PD), but that power bank has only a 10W (5V x 2.1A) output without PD.
How to understand if a cable is PD for fast charging? - Page 1
Forum section: electronics / general

author: FoxAdriano
author_rank: Contributor
timestamp: May 03, 2025, 04:50:04 pm
content: Hi, I have various camcorders, cameras, laptops, lamps, etc, etc. some have batteries with the ability to accept a fast charge, so they need a suitable PD cable for fast charging.But unfortunately my USB C cables have all mixed up and I no longer know which one is from one product and which one is from the other..How can I distinguish the various cables and get the right ones for fast charging?Thanks for some info.

author: kripton2035
author_rank: Super Contributor
timestamp: May 03, 2025, 06:01:29 pm
content: https://treedix.com/fr/collections/tools/products/treedix-usb-cable-tester-board-usb-cable-checker-data-wire-with-acrylic-case-charging-test-data-line-type-c-micro-type-a-type-borhttps://treedix.com/fr/collections/best-seller/products/treedix-usb-cable-tester-usb-c-cable-tester-usb-tester-for-data-transmission-and-power-transmission-cable-testing-resistor-testing-type-c-emarker-for-usb-a-micro-b-micro-b-3-0-type-c-lighting-mini-b

author: tom66
author_rank: Super Contributor
timestamp: May 04, 2025, 09:35:28 am
content: If a USB-C cable has a USB-C connector on both ends, then it must support a minimum of 20V/3A charging to be compliant. So all should work for charging.

author: FoxAdriano
author_rank: Contributor
timestamp: May 04, 2025, 09:46:19 am
content: So it seems to me that I can use a cable with 2 USB C ends and buy this extension to be able to connect it to the laptop.https://www.amazon.it/Adattatore-maschio-femmina-adattatore-realizzato/dp/B0CR8WDKL9?__mk_it_IT=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=22STLBQ2DKLW6&dib=eyJ2IjoiMSJ9.zPjBtwowCiqWN9812vmJ0K3jn2oUzRlEzSBWJIq49D6zbe1V_dKXDBA6dkycvz4cQUddX6Aue4u54fcJofErh_HjpSM-5jD8YHO1njOnl6nDUVMDoJBtFpAZyzpQoTOk8Ul4z8ny0EWUPYDb_eX0VhfbaK8T8dsIBK4gQhzET2mMIuCD8ERkhs1kL6BqMA6keHvsDk5jd45nN8_g0zDH8JkvdKRFvIWyqq-U1fwWPJXTTB1qNTcbNWlzRD9DfpyfJOYp7p-wKDQXsogeHKZphuASPRa9P_ZB2QiqJ_rdS2w.kVbO9GW0jLG-0fvDVxyLUZ_AcdfjdfwkPqPnNrZAtw4&dib_tag=se&keywords=Cavo%2Badattatore%2Balimentazione%2BDC%2B12V%2B4.0%2Bx%2B1.35mm%2Ba%2BUSB%2BC&qid=1746293326&s=electronics&sprefix=cavo%2Badattatore%2Balimentazione%2Bdc%2B12v%2B4.0%2Bx%2B1.35mm%2Ba%2Busb%2Bc%2Celectronics%2C168&sr=1-1&th=1
Tariffs are affecting other countries - Page 1
Forum section: electronics / general

author: u666sa
author_rank: Frequent Contributor
timestamp: May 05, 2025, 11:04:02 pm
content: Sirs, I hear in Russia people are complaining products on aliexpress got more expensive pretty fast. Much more expensive than on ozon (Ruissian version of amazon) and on wildberries (another clone of amazon). Fact.What's happening?China lost major market, and now other countries will have to pay more to keep China satisfied.Seems to be what it is.

author: SteveThackery
author_rank: Super Contributor
timestamp: May 05, 2025, 11:54:48 pm
content: That seems strange. I would have thought that US tariffs would lead to China dumping products into non-US markets,reducingthe prices.Odd. Perhaps someone here can explain.

author: u666sa
author_rank: Frequent Contributor
timestamp: May 06, 2025, 12:42:47 am
content: [Edited by Moderator: Is that really relevant?]

author: tggzzz
author_rank: Super Contributor
timestamp: May 06, 2025, 08:33:13 am
content: Quote from: u666sa on May 06, 2025, 12:42:47 amProbably not relevant.While that OP indicates the USA flag and "Miami Fl", he consistently pushes Putin's PoV, e.g.https://www.eevblog.com/forum/chat/when-your-marketing-bot-goes-berzerk/msg5901540/#msg5901540While he is free to push those views, not openly indicating his origin is dubious.

author: bingo600
author_rank: Super Contributor
timestamp: May 06, 2025, 08:39:51 am
content: Quote from: tggzzz on May 06, 2025, 08:33:13 amHis github link mentions another location.

author: tggzzz
author_rank: Super Contributor
timestamp: May 06, 2025, 09:10:37 am
content: Quote from: bingo600 on May 06, 2025, 08:39:51 amWell spotted; links updated

author: brucehoult
author_rank: Super Contributor
timestamp: May 06, 2025, 09:25:07 am
content: Quote from: bingo600 on May 06, 2025, 08:39:51 amIt's the Miami of Russia :-) I've been there for Formula 1 in the first weekend of May, but now the first weekend of May is Miami.If Sochi is Miami, maybe Anapa is St. Augustine. And they want Crimea to be Key West lol.

author: joeqsmith
author_rank: Super Contributor
timestamp: May 06, 2025, 12:38:13 pm
content: He does have a couple hour video about leaving Russia and coming to the USA. Too long to watch but I would assume with the war, maybe their number was up. With their photos of the dead bear and knife in their ear, maybe they figured out as easy as it is to kill an animals from a distance with a high power rifle, humans will shoot back.With the USA deporting so many, I wonder they had to offer that got them in.

author: thm_w
author_rank: Super Contributor
timestamp: May 06, 2025, 09:56:27 pm
content: When production volume goes down, costs would go up. That is long term change, but, some manufacturers or suppliers will try to pre-empt the change by raising costs early to not get caught.Aliexpress prices aren't specific to a country, afaik, they are global. Unless you are talking about: currency changes, local VAT or taxes, shipping costs, etc.Anyway you can link a specific item in question and discuss if you want, use a site like alipricetracker to look at the price history.
Bloody RS again - Page 1
Forum section: electronics / general

author: BradC
author_rank: Super Contributor
timestamp: May 02, 2025, 03:45:48 pm
content: I ordered some 5F super caps from RS a couple of days ago on the basis they were "in stock worldwide for 10 day delivery". I should have ordered them from Digikey, but I wasn't in *that* much of a hurry and I happened to be logged into RS at the time so I thought I'd just use them.2 days later I get a "change of delivery status" e-mail from RS telling me now they'd be *dispatched* (not arrive at my door) some time around the 20th of May.Frustrated, I ordered another set from Digikey (they'll be here Tuesday) and then sent a stinking reply to the RS notification explaining that I'd been using them for over 30 years and their progressively degrading service, terrible website and lack of stock has often sent me to other suppliers. "As you are unable to keep your sales contract (delivery within 10 working days) please cancel the order and refund the payment as I've bought them from Digikey and they actually know what customer service means."That was last night.Blow me down, 20 minutes ago (after 11pm here) I get a dispatch note with express delivery from RS to say they're on the way and will be here in half the original estimated time. So now I'll have double the quantity I need. Does go to show though that their customer service is bloody poor when they can make it work when they want to.A shower of bastards!
Help identifying NOS Tektronix parts - Page 1
Forum section: electronics / general

author: veedub565
author_rank: Frequent Contributor
timestamp: January 07, 2023, 03:43:53 pm
content: I've got a large quantity of NOS Tektronix parts which I'm trying to catalogue and price up to get rid of. I've done some, but there's still a lot of parts I don't know what they are or what their value is.Is there any online resource that might be useful ?Putting the part number into google works for some of them, but doesn't always reveal what the part actually is, and rarely any for sale.Same for EBAY, quite a lot of these parts aren't on there.(List of parts attached)

author: AVGresponding
author_rank: Super Contributor
timestamp: January 07, 2023, 04:05:13 pm
content: Have you tried the TekWiki?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: January 07, 2023, 04:12:59 pm
content: Try here for some part numbershttps://www.sphere.bc.ca/test/tekequiv.htmlThen there's Yahoo TekScopes groups where you can search or ask people.

author: edavid
author_rank: Super Contributor
timestamp: January 07, 2023, 04:56:04 pm
content: For parts not made by Tek, you can look in the Common Design Parts Catalogs:https://w140.com/tekwiki/wiki/Common_Design_Parts_Catalogs

author: veedub565
author_rank: Frequent Contributor
timestamp: January 07, 2023, 05:36:08 pm
content: Thanks for the suggestions, had a look at TekWiki and Sphere.120-0341-00 for example appears to be an IC of some sort, literally comes up with one hit when you google it.

author: tautech
author_rank: Super Contributor
timestamp: January 10, 2023, 07:29:58 am
content: Quote from: veedub565 on January 07, 2023, 05:36:08 pmOf course.It’s a Tek pt# not used by anyone else.This is where the cross reference charts sources linked earlier are invaluable.

author: qfx
author_rank: Newbie
timestamp: May 02, 2025, 08:07:24 am
content: I've been getting the manuals OCRd then exporting part refs for searching - some of the descriptions are helpful and, of course, we get to see the context for their use in the schematics.I found this thread when looking for a particular ref myself
Interesting retrospective on audiophillia, or even just the electronics. - Page 1
Forum section: electronics / general

author: aargee
author_rank: Frequent Contributor
timestamp: May 01, 2025, 09:30:18 pm
content: From the BBC archives.https://youtu.be/Us6hQLwG1S8?si=FfnuJtq1U00hs48J
simulink quality criterion - Page 1
Forum section: electronics / general

author: Danil_Pochkanov
author_rank: Newbie
timestamp: May 04, 2025, 01:30:37 pm
content: Good day to all! Please tell me, so I created two ACS with a P and a PI controller.As a result, I got the following curves.I know how to manually determine the static and dynamic error, the degree of attenuation, the adjustment time, and overshoot from the graph. But in the near future, I will have to create many ACS for my diploma, both single-circuit and cascaded with different regulators. Is there a way to automate or at least simplify the process of determining these regulatory criteria so that you don't have to count them yourself every time?
Universal Travel Adapter PD (Power Delivery)? help! - Page 1
Forum section: electronics / general

author: FoxAdriano
author_rank: Contributor
timestamp: May 01, 2025, 11:47:59 am
content: Hi,I have to admit that I am not an expert and I need some advice.I travel quite often to remote areas of Africa, Asia, South America and I need a good Universal Travel Adapter to be able to quickly recharge my devices: Osmo Pocket 3 batteries, Notebook, batteries for my lamp, etc.I need a Universal Travel Adapter PD (Power Delivery) that allows me to fully exploit my needs. Sometimes I recharge them individually but sometimes also simultaneously.I already know that these recharges can deteriorate the batteries more quickly, but I will recharge them about 4-5 times and no more on each trip. I travel twice a year, so all the other times I will recharge the batteries at home in a slower way.My question: can anyone recommend me a good and reliable plug adapter, Universal Travel Adapter PD (Power Delivery)? Could a 65W be enough?THANK YOU for your kind replies.

author: u666sa
author_rank: Frequent Contributor
timestamp: May 01, 2025, 01:56:12 pm
content: Oh. Well, you need a charger with battery pack inside of it. Something like thishttps://infinacore.com/products/p3-wireless-travel-power-bankOnly from aliexpress and with bigger battery capacity, and just like infinacore in the link it should have many plug options.P.S. option in the link is bad don't buy it. It takes forever to charge iPhone with it. It's okey for a short trip, 48 hours or less, but for something longer it's not good enough.
Dog Chewing a Lithium Battery - what could possibly go Wrong - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: May 01, 2025, 02:30:46 am
content: does your Dog like to chew anything left lying around when your not home? -see video

author: Halcyon
author_rank: Unknown
timestamp: May 01, 2025, 03:31:16 am
content: Lucky escape for those dogs.

author: artag
author_rank: Super Contributor
timestamp: May 01, 2025, 12:37:59 pm
content: Are they admiring the cosy fire they created all on their own, or staring horrorstruck at the devastation ?

author: RoGeorge
author_rank: Super Contributor
timestamp: May 01, 2025, 12:49:49 pm
content: The legend says every time a dog eats a battery, it will turn into this:C.H.O.M.P.S. (1979) Movie Trailer - Wesley Eure, Valerie Bertinelli & Conrad BainMr80sMoviesBy the way, that was a captivating movie for us, the kids from the "Cercul de electronica" (a club during the communist regime, similar with a nowadays makerspace). Apparently that movie is free now on YouTube. Still a fun movie to watch in 2025, 45+ years later:https://youtu.be/bbdOXz8UTxc

author: themadhippy
author_rank: Super Contributor
timestamp: May 01, 2025, 12:59:54 pm
content: Would the addition of K9P extinguished or made the fire worse

author: SiliconWizard
author_rank: Super Contributor
timestamp: May 01, 2025, 01:16:41 pm
content: At least the dogs managed to stay alive. I've seen stupider ending with humans involved in similar fires (well, not from chewing batteries, but sometimes that's not much better).