hybridfree/eevblog-posts huggingface dataset:
AudioQuest Perfect Surface copper/grain snakeoil nonsense? - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: September 05, 2021, 03:28:27 am
content: I was thinking about that term "perfect surface" from AudioQuest and found a document:https://www.audioquest.com/resource/1142/DoNoHarm-whitepaper-1222-11-r11.pdfQuoteI thought some cables were already coated in silver? to stop oxidization.If they achieved this "surface perfect" with the so called "grains" as they put it then wouldn't directionality matter to them?How can it be possible to "work against a grain" when they are in all shapes or sizes but then that wouldn't matter if it was as they say "smooth" and "pure".I never heard of it and it doesn't seem practical to me to manipulate conductors in such a way to control all the microscopic artifacts throughout the cable.What do they do in the factories making these things if it is not "possible" to test directionality? properly, have someone "listen" to it as it is stringing along the noisy production line?I think they are correct on that one... they certainly test the human ears into the "direction" of buying these things with all the marketing snake oil claims and material.What do you think?

author: Haenk
author_rank: Super Contributor
timestamp: September 06, 2021, 08:53:35 am
content: Silver (and copper as well) will react with sulfur (various stuff) from the air. So for exposed contacts like plugs, that's usually not a good idea.For home AV systems, there is no point in silver coating your cables, nor is there a point in using monocrystal copper.I only see a point in having your audio connectors gold-plated (no corrosion, not contact problems). So that's a recommendation for hassle-free use; there is no influence on the audio quality (other than avoiding issues with unreliable contacts).All stated marketing blurb is more or less nonsense. "optimized through listening tests", yeah, sure. We all know how this works

author: Halcyon
author_rank: Unknown
timestamp: September 06, 2021, 01:28:27 pm
content: Looks like a slab of makeup to me. Are they sure they aren't talking about Maybelline? It would at least be much more believable and make some kind of sense.

author: Cerebus
author_rank: Super Contributor
timestamp: September 06, 2021, 01:56:58 pm
content: "Simply put, the conductor has lowerperceiveddistortion when running in one direction ..."This perception can only be achievedsubsequentto having the prior and necessary perception of feeling your wallet drain.

author: ConKbot
author_rank: Super Contributor
timestamp: October 04, 2021, 10:00:45 pm
content: "Introducing distortion" they sell coax, PIM testers exist. If they wanted a number to tout, al they need to do is rent some equipment.Low PIM 7/16DIN interconnects, and convincing people to retrofit equipment, that could be lucrative

author: bob91343
author_rank: Super Contributor
timestamp: October 05, 2021, 12:02:44 am
content: Snake oil for sure. All claims like this need to be substantiated by data. I don't see any substantiation. So I have no reason to accept those specious conclusions.
Concrete from Mars dust and astronaut pee - Page 1
Forum section: electronics / general

author: thinkfat
author_rank: Unknown
timestamp: September 23, 2021, 07:33:50 am
content: This is just on reference I found, but it's all over the news:https://gadgets.ndtv.com/science/news/astrocrete-astronaut-blood-sweat-tears-mars-homes-dust-concrete-material-moon-university-of-manchester-2548418Quote

author: Haenk
author_rank: Super Contributor
timestamp: September 23, 2021, 07:41:42 am
content: Vulcanic ash has been used for thousands of years as a concrete-like building material, with amazing properties - so that might work well.However the problem is the water - one would assume a recycling process for astronauts or space stations, so unless they find some nice, easy-to-use water source, their idea won't work.

author: thinkfat
author_rank: Unknown
timestamp: September 23, 2021, 07:48:30 am
content: Quote from: Haenk on September 23, 2021, 07:41:42 amWater, proteins, minerals in the urine, these are literally the rarest materials on Mars and not replenishable other than via spaceship from Earth. How did they come up with the idea to literally piss them away, claiming it is less expensive than bringing concrete bricks to Mars.

author: Infraviolet
author_rank: Super Contributor
timestamp: September 27, 2021, 11:10:41 pm
content: They didn't want to use all the valuable chemicals in the urine, just a specific single substance "HSA" which they found helps bind together what is otherwise a very dusty soil.https://www.theregister.com/2021/09/14/martian_blood_brick_plan/That link gives a bit mroe detail, plus a further link to the research paper.

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 28, 2021, 09:49:31 pm
content: Uh yeah.Still makes you wonder if we have nothing better to do these days.

author: thinkfat
author_rank: Unknown
timestamp: September 29, 2021, 10:28:54 am
content: Quote from: Infraviolet on September 27, 2021, 11:10:41 pmIn such environment as is Mars, to sustain human life _nothing_ is waste. If you can't find it locally or are not able to make it from local raw material, it's not expendable. You will not find cemeteries on Mars because dead people will have to be be recycled.HSA btw is a protein found in human blood, not urine. The stuff they wanted to extract from pee is urea, which I'm sure could be better used as a fertilizer (it decomposes to carbon dioxide and ammonia).
Non-DODGY Packaging / Product Question:. FOLDING MIRROR has Air Spring ? - Page 1
Forum section: electronics / general

author: RJSV
author_rank: Super Contributor
timestamp: October 05, 2021, 04:22:23 pm
content: Hello, my little folding mirror has a fascinating way, of doing a spring-loaded 'lazy' unfolding.It was taking about 2 seconds, to fully open upwards, after release is pressed.Now, a cold morning outside, and the SLOWDOWN is just awesome: taking some TEN seconds, to fully auto-open for use !So, is this a classic 'air shock' or 'air spring', similar to those used on big lids, absorbing and slowing the downward (closing) of a lid to 1950's - 1970's style computer tape drives, loadable disk drives printers, etc.Am I looking at a little rotary spring, perhaps with air chamber. Idea is that any movement requires changing a plunger, pushing or pulling air through small hole. And with a spring acting in parallel.See, in picture, each 'hinge' being enclosed in (cylinder).Thanks

author: Raj
author_rank: Frequent Contributor
timestamp: October 05, 2021, 04:40:22 pm
content: could be just sticky goo with coil spring

author: SeanB
author_rank: Super Contributor
timestamp: October 05, 2021, 07:25:41 pm
content: Quote from: Raj on October 05, 2021, 04:40:22 pmYes, typically those use a spring in the hinge area, and partly fill the spring area with a kilopoise grease, so that the spring and hinge is massively damped down and moves slowly.

author: Raj
author_rank: Frequent Contributor
timestamp: October 06, 2021, 11:06:40 am
content: Quote from: SeanB on October 05, 2021, 07:25:41 pmkilopoise grease? Oh, so that's what's it's called.I have a microscope that had a sticky substance on it's rack and pinion to make it sticky and I accidently wiped it. Will kilopoise grease work there?

author: electr_peter
author_rank: Unknown
timestamp: October 06, 2021, 07:00:42 pm
content: Foldable car roof handles have similar mechanism to slow down movement. It moves slowly back under spring tension in a slow motion. Small component inside acts as a damper. However, if you pull handle too many times in a row, resistance disappears as it heats up. Not sure what kind of substance is inside, likely heavy oil or some waxy substance (but definitely not air).Example part on AliExpress for VW cars,"car armest damper"

author: rsjsouza
author_rank: Super Contributor
timestamp: October 06, 2021, 07:15:04 pm
content: Quote from: Raj on October 06, 2021, 11:06:40 amKilopoise is actually a brand name (here), but indeed is a good search term for "damping grease"."Poise" is the unit for viscosity.

author: RJSV
author_rank: Super Contributor
timestamp: October 08, 2021, 04:19:24 am
content: Great replies, all.I am learning, (my) impulse runs 'too elaborate',Simple 'grease', no need for complicated 'air hole'...
Chinese 25A Solid State Relay dissection - Page 1
Forum section: electronics / general

author: NEDM64
author_rank: Contributor
timestamp: August 16, 2021, 12:18:29 am
content: So I had a cheap Chinese Solid State Relay laying arround for a personal project I'm working on, and after knowing what was inside one of those Fotek ones (or fakes), I started to wonder whats inside of mine before using it.So I teared it apart, ended up destroying the unit, but I think it was worth it. The relay is sold as a Jotta SSR-25DA and they are selling it for 3.33€ + 1€ of shipping on AliExpress.Pleasantly surprised for what I got for the price, first, it had no epoxy to hide the junk inside, and it has a generic BTA24-800 snubberless Triac soldered to the back plate (for heat sinking) and a generic MOC3063 optocoupler with zero-cross circuit (so it should work well with inductive loads).Here are the results of the dissection I want to share with you:

author: T3sl4co1l
author_rank: Super Contributor
timestamp: August 16, 2021, 12:39:54 am
content: Not sure about the SOT-23 ("B1" and "81" don't correspond to any obvious NPNs), but the circuit is clearly a pair of GP NPNs in a "ring of two" CCS. Nice. And individual resistors to share current between the two LEDs.Is that baseplate aluminum? Cronchy... takes special flux to do that [in production*]. Hope the workers had adequate ventilation...*You can of course do it any number of hacky ways, but nothing that's going to be better than just epoxying the poor thing down.Hmm, where's the isolation? Oh, that must be an isolated tab TRIAC huh? (Edit: it is. BTB is the uninsulated version.)Tim

author: NEDM64
author_rank: Contributor
timestamp: August 16, 2021, 02:42:00 am
content: Quote from: T3sl4co1l on August 16, 2021, 12:39:54 amThe SOT23-3 is very hard do read, I think it says "B 1" or something.For the baseplate, steel is what it isn't, as it's very light.

author: Alti
author_rank: Frequent Contributor
timestamp: August 18, 2021, 09:26:27 am
content: Quote from: NEDM64 on August 16, 2021, 12:18:29 amWhat does "generic" mean here? Could you compare that againstlcscor digikey numbers/pictures?It does not make sense to connect 800V triac with 600V optotriac in parallel.Also "soldering" to aluminium usually uses some Al and Zn brazing alloy, these melt "low" but nowhere near 260oC the max typical package is designed for.You reversed MT1 and MT2 on the drawing(red) and these blue lines do not make sense - you connected GATE to bolt terminal.Then, how did they manage to swap the sequence of pins? Standard package has it: MT1,MT2,GATE and this does not align with the picture. Did they criss-cross the pins?The MELF resistor in low cost product - this is super odd, these resistors are quite expensive.
Plasma kinetics - hydrogen storage - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 13, 2021, 10:38:12 am
content: Quite apart from the issue of how you actually generate the hydrogen, this is getting my BS detector twitching...

author: Haenk
author_rank: Super Contributor
timestamp: August 13, 2021, 11:57:16 am
content: Munro is one of *the* EV guys (and girls), for a long time now, and is still consulted by most major carmakers. I'd give him a credibility score of about 100 (from 0-100).His teardowns are a joy to watch, also his introduction into some current projects he is working on.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 13, 2021, 12:27:37 pm
content: Quote from: Haenk on August 13, 2021, 11:57:16 amYes but he's no chemist or physicist, and does make technical errors on some of the teardown videos. We also don't know what he was actually shown, if anything.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 15, 2021, 10:37:03 pm
content: This is one of their patentshttps://patents.google.com/patent/US20100163434A1/en?oq=us20100163434A1
Yet another Free Engery from Utube really funny - Page 1
Forum section: electronics / general

author: Labrat101
author_rank: Unknown
timestamp: August 19, 2021, 09:30:10 pm
content: Hi all was just watching this Guy . His skills with a Hot glue gun are intriguing How he balances spinning barsand large magnets without them flying off. Motors and coils and not to forget the Diode . The soldering skill isamazing to watch , He make no less than 10 . Yes 10 Free energy machines.The bearing and housings are all of course zero friction and the wobble is just an added bonus .If it was possible to build FREE Energy like this . Should n't one patent it first&Not let others just steel this BS.!! ideaIts 100% BSBut what fascinated me was the time he spent building these weird contraptionsAnd he has a talent with a Hot glue gun . The music is horrible so keep the sound off .Really Funny .

author: Haenk
author_rank: Super Contributor
timestamp: August 20, 2021, 09:10:45 am
content: I'm not sure what their intention is. Some mythical, stupid investor buying their "technology"? Men In Black, zapping them? Showing their stupidity in public?Off to grab some old Mabuchis...

author: Labrat101
author_rank: Unknown
timestamp: August 20, 2021, 05:48:43 pm
content: Its funny that it only works when the battery touches the 2 wires sticking up .OOOP my mistake the magnet . disguised as a batteryas he moves the Round black thing there is clearly seen the spark from the commutator .He should be a magician .Is he making money from this??

author: PlainName
author_rank: Super Contributor
timestamp: August 21, 2021, 11:26:42 pm
content: QuoteYoutube payback. That one has ~402K views and 75K subscribers. The thing doesn't need to work or do anything - every time it gets linked to and laughed at on a serious forum he is making more money.
Spanish engineers extract drinking water from thin air! - Better than Waterseer? - Page 1
Forum section: electronics / general

author: SourManiac
author_rank: Newbie
timestamp: August 09, 2021, 12:03:04 pm
content: Is this just another Waterseer? Or is this actually going to revolutionize water availability in countries with lack of drinkable water?The company behind this product seems to be called Aquaer, although I'm not sure if that's the name of the actual product instead.This seems to be their official youtube channel:https://www.youtube.com/channel/UC6_G3D_KOnto3y__3mrcYvwAlso someone should sent these to Thunderf00t.

author: Gyro
author_rank: Super Contributor
timestamp: August 09, 2021, 12:08:56 pm
content: Welcome to the forum.Unfortunately this one was already raised a few days ago...https://www.eevblog.com/forum/chat/spanish-engineers-extract-drinking-water-from-thin-air/

author: SourManiac
author_rank: Newbie
timestamp: August 09, 2021, 12:12:06 pm
content: Quote from: Gyro on August 09, 2021, 12:08:56 pmSorry I made the mistake of not using the search function before posting. My bad.

author: Cyberdragon
author_rank: Super Contributor
timestamp: August 10, 2021, 07:15:20 am
content: TBH that should be moved here.

author: Gyro
author_rank: Super Contributor
timestamp: August 10, 2021, 07:32:13 pm
content: Quote from: Cyberdragon on August 10, 2021, 07:15:20 amThat's a tricky one isn't it. I'm inclined to agree, but the trouble is that the technology works (and is used every day in dehumidifiers). The only trouble is, it doesn't work where it's most needed! I suppose that counts as dodgy.
yet another dumb transport idea - charging frickin' roadways - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 05, 2021, 08:36:58 pm
content: https://www.electreon.com/

author: SiliconWizard
author_rank: Super Contributor
timestamp: August 05, 2021, 11:02:28 pm
content: Yeah. There are vehicles that can be directly powered from the "roads" they operate on. They are called trains.But anyway. Yet another bullshit. Reminds me a bit of the solar panel thing on cars.No practical way it can ever *recharge cars* while on the go, as that would mean powering them + getting enough extra power to recharge the batteries. At best, it would improve mileage on a single charge, but you'll still need to stop the car at some point to effectively recharge it. A simple calculation will easily show you this. The amount of power that a typical road would need to deliver so that any significant amount of power is transfered wirelessly to all EVs driving on it (significant enough to at least make a sizeable difference for mileage) would be quite gigantic.The claim "No need to stop for charging" is complete BS, but even improving mileage significantly looks suspicious.

author: CJay
author_rank: Super Contributor
timestamp: August 06, 2021, 11:46:13 am
content: Quote from: mikeselectricstuff on August 05, 2021, 08:36:58 pmAnother one hoovering up the venture capital.Wondering what your take on this idea is?https://www.theguardian.com/environment/2020/jul/27/ehighways-could-slash-uk-road-freight-emissions-says-study

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 06, 2021, 01:21:46 pm
content: Quote from: CJay on August 06, 2021, 11:46:13 amRather more plausible - I wonder about the reliability of a two-contact pantograph, but see that it could probably be made to work.

author: CJay
author_rank: Super Contributor
timestamp: August 06, 2021, 02:32:42 pm
content: Quote from: mikeselectricstuff on August 06, 2021, 01:21:46 pmTrolleybus style, not sure how they'll deal with movement between lanes, engaging, disengaging etc and it could be fraught if 45 tons of of cargo laden truck gets tangled up on a carriageway that's got mixed traffic, wouldn't be fun to have a multi KV cable whipping around on the carriageway, but in principle it's not a terrible idea

author: Haenk
author_rank: Super Contributor
timestamp: August 06, 2021, 02:45:48 pm
content: This principle has been in use 100 years ago - but it's a mixed bag. High infrastructure costs plus low reliability, but also much lower vehicle costs, risks and likely less emissons.
Nikola Motor- the next Theranos? - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 10, 2020, 11:26:27 pm
content: https://hindenburgresearch.com/nikola/

author: bdunham7
author_rank: Super Contributor
timestamp: September 11, 2020, 12:13:21 am
content: Party like it's 1929.....

author: ataradov
author_rank: Super Contributor
timestamp: September 11, 2020, 12:50:34 am
content: They are the best at making cool looking 3D models of cars.

author: bsfeechannel
author_rank: Super Contributor
timestamp: September 11, 2020, 01:13:32 am
content: It took me a few milliseconds to realize the news was not about Tesla.

author: sokoloff
author_rank: Super Contributor
timestamp: September 11, 2020, 01:32:37 am
content: Hands down the best name I've seen for this type of "find a fraud, short sell the crap out of it, publish your findings" firms.Oh the humanity!

author: schmitt trigger
author_rank: Super Contributor
timestamp: September 11, 2020, 01:54:33 am
content: What can I say?Poor Nikola Tesla must be spinning in his grave.

author: vk6zgo
author_rank: Super Contributor
timestamp: September 11, 2020, 03:08:44 am
content: Quote from: mikeselectricstuff on September 10, 2020, 11:26:27 pmI wonder if Trevor Milton has ever thought of running for POTUS?His statements are somehow, vaguely familiar!

author: Haenk
author_rank: Super Contributor
timestamp: September 11, 2020, 07:05:58 am
content: Their shares doing surprisingly well (still), it seems.

author: RenThraysk
author_rank: Regular Contributor
timestamp: July 29, 2021, 02:59:15 pm
content: The beginning of the end?Trevor Milton indicted on three counts of fraud.https://www.msn.com/en-us/money/news/grand-jury-indicts-trevor-milton-founder-of-electric-carmaker-nikola-on-three-counts-of-fraud/ar-AAMHKyj

author: AVGresponding
author_rank: Super Contributor
timestamp: July 29, 2021, 04:23:11 pm
content: Quote from: schmitt trigger on September 11, 2020, 01:54:33 amCue the next fraudster, who will claim to generate electricity from that...

author: daqq
author_rank: Super Contributor
timestamp: July 29, 2021, 06:16:05 pm
content: An amusing summary:

author: SiliconWizard
author_rank: Super Contributor
timestamp: July 29, 2021, 07:03:31 pm
content: That's a very good one.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: July 29, 2021, 08:48:03 pm
content: Trevor Milton charged with fraud:https://www.cnbc.com/2021/07/29/us-prosecutors-charge-trevor-milton-founder-of-electric-carmaker-nikola-with-three-counts-of-fraud.html

author: Haenk
author_rank: Super Contributor
timestamp: August 04, 2021, 07:17:48 am
content: quote: "the 39-year-old billionaire"So this stunt still brought in some money, it seems.And this story also shows how fraudulent most stock valuations are.
Green-Cap 500F Supercapacitor EDLC 2.7v Samwha  - Page 1
Forum section: electronics / general

author: Pineapple Dan
author_rank: Contributor
timestamp: July 07, 2021, 07:12:12 pm
content: I bought about 15 of these a few years back and never did much with them until now. Thought I had ruined a few by heating up the terminals too much back in the day but this actually wasn't the case. They were simply DoA*Roughly half of them were DoA. These must be some of the worst motherf***ing pieces of sh!t I ever bought.*One more (straight from the package) would not charge and instead heated up significantly*2 more discharging quite fast and getting kind of warmI **might** have 6 left to make my 16.2v bank with that I went through the trouble of 3D printing a case for but quite possibly I'll have to just abandon these caps and buy real ones as I suspect the self-discharge for the remaining so-called good ones is still unacceptably high.These are still sold on Ali Express. I hope they have improved since - I'd be very slow to waste any more money on these. Anyone here bought them more recently and had a positive experience?

author: agtrbt
author_rank: Contributor
timestamp: July 11, 2021, 08:24:44 am
content: They may be genuine but stale.Certain types of capacitors have poor shelf life, some EDLC might use nano thin and even perishable separator.

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 13, 2021, 12:41:02 pm
content: Electrolytic capacitors that have not been used in a long time ideally should be "reformed" by slow charging them to their rated voltage (or at least some voltage between their rated voltage and the maximum voltage they'll see in circuit) over the course of hours or days.

author: Refrigerator
author_rank: Super Contributor
timestamp: July 13, 2021, 01:28:19 pm
content: Quote from: NiHaoMike on July 13, 2021, 12:41:02 pmIIRC these are carbon supercapacitors, so i don't think there would be much reforming?

author: Mr Evil
author_rank: Regular Contributor
timestamp: July 15, 2021, 05:52:29 pm
content: I bought a few of these in 2016, and a few more in 2018 on eBay. They all worked fine, and are still working. However, their measured capacitance was 400F±20% rather than 500F. I was tempted to try buying some 400F ones to see if they were 400F or 300F, but never did.
2021 Ford Mustang Mach-E E:2 Frunk and Thermal System Thermal System Nightmare - Page 1
Forum section: electronics / general

author: DougSpindler
author_rank: Super Contributor
timestamp: June 13, 2021, 03:01:08 pm
content: Interesting teardown of the 2021 Ford Mustang Mach-E E:2 Frunk and Thermal System.https://youtu.be/C1dQtlrI7uU

author: Tomorokoshi
author_rank: Super Contributor
timestamp: June 18, 2021, 08:23:02 pm
content: Interesting.The Mach-E looks like a Mazda.

author: BrokenYugo
author_rank: Super Contributor
timestamp: June 18, 2021, 09:21:37 pm
content: The questionable build quality and half baked engineering is a given with the big 3. What I'm confused about is how this thing was conceived. Who is this car is supposed to appeal to and why is it called a Mustang? Like if you're gonna build an electric Mustang the obvious thing to do in the spirit of the product line is to just cram as much motor as you can into a stripped down production or minimally altered Mustang chassis and be done with it. Just needs to be fast enough to piss off insurance companies and go through a lot of rear tires, cheap, and loud, not some focus group driven gizmo laden knockoff Tesla crossover thing.

author: DougSpindler
author_rank: Super Contributor
timestamp: June 18, 2021, 11:00:28 pm
content: Ford is trying to squeeze as much profit out of the Mustang name. I think just the Mustang name sells this car.

author: SilverSolder
author_rank: Super Contributor
timestamp: June 18, 2021, 11:25:57 pm
content: Ford has abused the Mustang name in the past, with several really pathetic models bearing the name. They have had a good run since about 2005 with the "retro" Mustang, so I guess it's about time to destroy the marque again for a while!

author: DougSpindler
author_rank: Super Contributor
timestamp: June 19, 2021, 12:59:34 am
content: New pres at Ford said 2 yrs ago he wants Ford to be known as a technology company instead of a car manufacture. . VW is suppose to be making all of their cars except Mustang and F150.

author: AVGresponding
author_rank: Super Contributor
timestamp: June 19, 2021, 12:48:08 pm
content: Quote from: Tomorokoshi on June 18, 2021, 08:23:02 pmFord have had a manufacturing partnership with Mazda for decades, it probably is.

author: schmitt trigger
author_rank: Super Contributor
timestamp: June 19, 2021, 01:40:48 pm
content: Ford is miking away their glory days products. I am sure that you are aware of its new Maverick truck.As such, I humbly propose that Ford’s new electric vehicle model to be named the E-Dsel.I know, its a lame joke but couldn’t resist.
£6,995 Shunyata 6 way pdu (standard UK wall sockets not ideal for high current) - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: June 16, 2021, 01:20:52 am
content: SHUNYATA’S DENALI POWER CONDITION NOW AVAILABLE IN UKPosted on 1st May, 2018https://www.theaudiobarn.co.uk/product/shunyata-denali-6000-t-v2/QuoteBullshit buzz terms:proprietary components, Medical grade audio filters, electromagnetic breaker, massive internal wiring ,DTCD® and the CCI™, QR/BB™ technology, CCI™ filter, NIC™, Trident Transient Protection Module, CAIG DeoxIT® and DeoxIT® GOLD contact fluids, KPIP™ process, burn in, SSF-50 isolation footerhttps://www.stereonet.com/uk/news/shunyatas-denali-power-condition-now-available-in-ukDoes look like much "massive internal wiring" in there to me.SSF-50 isolation footer:I am sure there is vibration everywhere including the chair they sit on so they might as well just build some kind of floating studio .The standard wall outlet is usually not ideal for high-current applications?:speechless:What do you think?

author: Haenk
author_rank: Super Contributor
timestamp: June 17, 2021, 09:30:57 am
content: "You may wish to experiment with other more expensive products."

author: srb1954
author_rank: Super Contributor
timestamp: June 18, 2021, 02:12:10 am
content: It has "a non current-limiting electromagnetic breaker".So, it doesn't limit the current even when you get an fault condition?Also, if their wiring colours conform to the normal mains wiring standards, it would appear that the breaker is connected in the neutral leg. That wouldn't provide any protection if you have a phase to earth fault.

author: MrMobodies
author_rank: Super Contributor
timestamp: June 18, 2021, 03:44:21 am
content: Quote from: MrMobodies on June 16, 2021, 01:20:52 amQuote from: Haenk on June 17, 2021, 09:30:57 amPhotoInduction is back and has experimented.Well here is high current out of a standard wall outlet:1000 Amp Hot Knife 2:50https://youtu.be/68MXD94Six0?t=250I think he's just the man to test these audiophoolery stuff he'll burn them in alright.
electromagnetic water softner - Page 1
Forum section: electronics / general

author: Raj
author_rank: Frequent Contributor
timestamp: June 17, 2021, 05:59:29 pm
content: Sounds like bogus science. Do they actually work.Attached: an example circuit and description from an ancient mag

author: Gyro
author_rank: Super Contributor
timestamp: June 17, 2021, 06:33:09 pm
content: At least that design has some current flowing through the coil - I've seen examples with two insulated single-ended coils, applied to copper pipes.[Edit, even here, the copper pipe will act as a shorted turn].I have no idea whether it works, I would suspect that, even if the principle is sound, the coil power level would be too small.There are 'water softeners' sold which have powerful Neodymium magnets clamped to the pipe. I don't know if these work either but the field strength would be much higher.I can't see why an AC magnetic field would be any improvement on a DC (permanent magnetic) field if the water is in motion through the pipe.

author: AVGresponding
author_rank: Super Contributor
timestamp: June 18, 2021, 12:10:08 am
content: It would seem to be a relatively simple matter to build and test it.As to whether it will work; my instinctive answer is "no".
Differential drive misunderstanding? - Page 1
Forum section: electronics / general

author: Raj
author_rank: Frequent Contributor
timestamp: June 13, 2021, 07:01:25 pm
content: Just saw this video a while ago-https://youtu.be/2SUiwQVWe8wIt's been bugging me, he claims thatLetRevolutions on output shaft=xRevolutions on input shaft 1 =yRevolutions on input shaft 2=zThenX= (y-z)/8Now the thing is, near the end, he says, it can achieve arbitrary speed (lower than max) and resolution in output shaft.I claim that he's wrong cause look at the equation.Output resolution is limited to input resolutionAnd so are speedsCause there's no division or multiplication happening here (except for a factor of 8 )Let's politely let him know about this
Sony Companion "device locked" bullshit - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: May 30, 2021, 02:53:00 am
content: I was trying to root a 3113 XA2 phone, had an older version of the tools and companion which ran without an issue (but no drivers as I'd thought it would come with it) but thought I'd continue on another Windows 10 machine installed the latest Sony companion to experience this bullshit message. Two things I find offensive, the typical dimming nonsense in the background, yes it has creeped in there too."Your device is locked."Now if they say "the program/app is locked" then okay but when they say "device" I think they mean phone and if that is the case... then yeah right.My phone is NOT locked.I guess they are trying to force or scare me into accepting updates through their new Sony Companion program.

author: amyk
author_rank: Super Contributor
timestamp: May 30, 2021, 04:30:41 am
content: Deny internet access. You should get a firewall, that way you'll see how many apps try to phone home...
New super battery. It even has Graphene in it. - Page 1
Forum section: electronics / general

author: Haenk
author_rank: Super Contributor
timestamp: May 17, 2021, 05:45:23 pm
content: https://www.forbes.com/sites/michaeltaylor/2021/05/13/ev-range-breakthrough-as-new-aluminum-ion-battery-charges-60-times-faster-than-lithium-ion/?sh=7fc966aa6d28Coming from Aussie-land to you - maybe, but not soon.I wonder why they don't have a deal with a large customer yet. Maybe, but only maybe, they are not the best, safest, fastest charging [insert more BS here] batteries, even if their CEO states so?

author: ConKbot
author_rank: Super Contributor
timestamp: May 17, 2021, 08:52:12 pm
content: Wow, experimental coin-cells. A step up from extrapolating from the performance of a test-tube cell like most batteries in "new break through (x) charges (Y) times faster than lithium ion. EV's/Phones could charge in (Z) minutes" type articles.

author: JohnnyMalaria
author_rank: Super Contributor
timestamp: May 17, 2021, 09:42:11 pm
content: Absolutely no mention of the cost comparison to produce the final cell and the cost of the production technology at full scale. Smacks of academia naivety.

author: MIS42N
author_rank: Frequent Contributor
timestamp: May 17, 2021, 10:06:30 pm
content: The science seems sound. Producing the graphene might be expensive but that seems to be the only barrier to commercialisation. I remember when white LEDs were experimental, had a lifetime of 1 hour before they self destructed. The main barrier is the problems Australians have bringing good technology to market. Hopefully they partner with people who are better at it.

author: penfold
author_rank: Frequent Contributor
timestamp: May 17, 2021, 10:14:41 pm
content: What's dodgy about it?I'd take exception to calling most academics naive, most of the ones I worked with were just downright malicious in thinking they had the hardest job in the process!

author: Haenk
author_rank: Super Contributor
timestamp: May 18, 2021, 07:43:49 am
content: Quote from: penfold on May 17, 2021, 10:14:41 pmThis is per se dodgy.There have been announcements by the hundreds of battery breakthrough technology over the past few years. After all these breakthroughs, Tesla came up with a bigger (in physical size) battery in 2020. Most battery companies went silent, forever. I wonder why.

author: Daixiwen
author_rank: Frequent Contributor
timestamp: May 18, 2021, 09:20:55 am
content: Quote from: ConKbot on May 17, 2021, 08:52:12 pmRunning EVs on coin cells is not a problem

author: SiliconWizard
author_rank: Super Contributor
timestamp: May 18, 2021, 05:38:49 pm
content: The problem is scaling that up. That's why it usually remains at the stage of coin cells.
Breeze portable "air conditioner" - Page 1
Forum section: electronics / general

author: AlbertL
author_rank: Regular Contributor
timestamp: May 17, 2021, 01:45:49 pm
content: https://www.thegadgetchaser.com/aircooler/bc1.htmlNothing more than an evaporative "swamp cooler" - that's been around for decades. I like how it provides "...relief from the scorching heat and humidity" but "It uses a genius water evaporation technique...".

author: Raj
author_rank: Frequent Contributor
timestamp: May 17, 2021, 01:53:03 pm
content: Another Swamp cooler rebrand. And that too a tiny one. I have 20l one and it's nothing but a salt throwing garbage (sure it works great with our 40% humidity but coats everything with brown salt)Just when will they stop...I guess we need to rebrand the AC instead.
A new DMM for the Tinfoil Hat Aficionados   ?  - Page 1
Forum section: electronics / general

author: peteb2
author_rank: Regular Contributor
timestamp: May 12, 2021, 08:31:51 pm
content: only $112 too.....https://theradblock.com/products/rz-electromagnetic-field-radiation-detector-tester-emf-meter-rechargeable-handheld-portable-counter-emission-dosimeter-computer-1

author: Haenk
author_rank: Super Contributor
timestamp: May 17, 2021, 08:48:28 am
content: Actually this seems like a real (measurement) product:http://www.wintact.net/en/products/wt3121.htmlInterpreting/abusing the measurement results is another thing though.

author: Black Phoenix
author_rank: Super Contributor
timestamp: May 17, 2021, 11:29:52 am
content: That's simple, sell everything and go live deep in a cavern (hope that there isn't any radiation from any radioactive element on the cavern) or a desert island somewhere in the Pacific. Done, no radiation whatsoever except the ones from the space that reach the earth and are emitted by the "star who shines upon us" (and some more I'm totally forgetting).It makes me remember when the Fukushima Daiichi nuclear disaster happen a lot of people started to be "nuclear engineers" and knowing the right units of measuring radiation and how much is too much, as also buying portable Geiger counters. I sold 20 Geiger counters on eBay back at the day, for 3x more that they cost me.But as Haenk said and totally right, is not using or being aware of that is the problem, is using the info in a wrong way.

author: srb1954
author_rank: Super Contributor
timestamp: May 17, 2021, 12:24:10 pm
content: Quote from: Black Phoenix on May 17, 2021, 11:29:52 amWhen selecting your Pacific desert island you should avoid a few places like Bikini Atoll and others in the Marshall Islands or Moruroa Atoll in French Polynesia. These are some of the most radiation contaminated places in the world with the decades of the nuclear weapon testing that was carried out in these locations.

author: Pluscrafter
author_rank: Regular Contributor
timestamp: May 17, 2021, 06:52:45 pm
content: Could you use this like for amateurradio to measure your antenna or is it for this even to dodgy or inaccurate?
Blaupunkt gold-plated fiber optic cable - Page 1
Forum section: electronics / general

author: Ultrapurple
author_rank: Super Contributor
timestamp: May 07, 2021, 03:07:35 pm
content: This is for real. I found it on eBayeBay auction: #303982007084. Presumably gold-plating the end of your fiber means better reflection back onto the source or something?Maybe one can persuade the cable to spontaneously lase if you align it just right with the ley lines during a favourable alignment of the planets.

author: penfold
author_rank: Frequent Contributor
timestamp: May 07, 2021, 03:45:32 pm
content: Hmm, that looks like it might only be a gold-plated ferrule.I could almost believe that plating on the end of the actual fibre could do something (not something particularly useful in that context... but stillsomething) via surface plasmon interactions

author: AVGresponding
author_rank: Super Contributor
timestamp: May 08, 2021, 10:35:09 am
content: Presumably it's just to help the ferrule resist corrosion?I'd be surprised to see Robert Bosch GmbH looking to enter the audiophool market.

author: Haenk
author_rank: Super Contributor
timestamp: May 09, 2021, 04:47:24 pm
content: It's just the "plugging plastic part" made shiny. This has no effect on anything, other than being bling bling.I assume the specification would not allow for a metal plug, as the counterpart is plastic as well and would become damaged.You can find other optical cables "golden" plugs on Amazon and ebay, if you really want to buy one.Btw. "BLAUPUNKT" is not the brand you might remember from the 80s (back to the 30s or so). It's just a "brandname for hire" from "GIP Development SARL".So it's just your usual chinese stuff with a wellknown brandname.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: May 10, 2021, 03:51:05 am
content: The effect it has is to not contaminate the electrical contacts. That type of optical link was used in devices like mini-disc recorders where the same plug was also a regular stereo headphone jack.I don't remember anymore if the metal tip was to tell the device that a fiber was inserted as opposed to an electrical cable.
Directional HDMI cables? - Page 1
Forum section: electronics / general

author: John B
author_rank: Frequent Contributor
timestamp: April 20, 2021, 02:37:52 am
content: I picked some wirelogic branded HDMI cables from costco, I think they're also sold at home depot in the states. I wasn't looking for "audiophile" stuff, but I noticed on the package that the cables are labelled as directional, ie there's an arrow pointing from source to monitor. The package states "Direction controlled conductors drain away distortion causing noise." and to orient them "For maximum performance". Needless to say it raised my eyebrow, but for a pack of 2x cables at costco they are cheaper than other consumer electrical stores, so again it's not like I purchased them as some premium product. Is it just marketing wank?

author: james_s
author_rank: Super Contributor
timestamp: April 20, 2021, 02:41:47 am
content: Definitely marketing wank. Costs virtually nothing, ropes in a handful of people who don't know any better. Might be marginally useful for keeping track of which cable is which if you have them coming and going to and from various devices I guess.

author: Algoma
author_rank: Frequent Contributor
timestamp: April 20, 2021, 02:51:46 am
content: HDMI cables near the maximum length of 50ft can have active booster and reciever chips in either ends of the cable that make them directional.. it's more of a trade off with limitations than a feature, needed to achieve a bit more distance.If the cable is below 25ft, then any basic quality cable shouldn't require active boosting to compensate for voltage drop over the distance. Simple is always best, a short cable doesn't need active boosting and it's just using an unnecessary part to raise the cost and increase the marketing wank for something that isn't necessary or needed in there.
Experience 880 cable - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: April 19, 2021, 07:30:46 pm
content: https://www.wireonwire.com/products/experience880-tunable-rca-audio-cable-interconnectQuoteThe only meaningful information I can see are those labelled in bold if they are true or not.Is it really worth £650?Looks very fragile to me.

author: ataradov
author_rank: Super Contributor
timestamp: April 19, 2021, 07:56:13 pm
content: Audio cables have to be the riskiest scam item to sell. The testing is trivial - split the signal at the source, pass one line though the coat hanger and the other one though the cable, compare on the other end. If you sound is the same, it is clearly not "analytical".Power cables and magic stones are much harder to clearly demonstrate like this.It would be nice to see some sales data on stuff like this. I wonder if people are as stupid as abundance of supply seems to show.
Another Cheap power supply :) - Page 1
Forum section: electronics / general

author: jord4231
author_rank: Regular Contributor
timestamp: April 14, 2021, 10:47:25 am
content: Just thought I'd share my recent experience with an eBay 20a 24v switch mode power supply.I purchased this to use in my self playing piano project (if your interested you can see it herehttps://youtu.be/xp2ocvnNoJs(this was a progress video its since complete)The power supply worked ok for a little while but just had no output all of a sudden it was not under much load at the time of failure.On further investigation the two large NPN transistors have failed shorted.It almost looks like the board has been wet at some stage (not in the time I've owned it) the dried crusty flux everywhere is a bonusPhotos almost don't do it justice but I'm sure you get the hint. Enjoy

author: MrMobodies
author_rank: Super Contributor
timestamp: April 14, 2021, 08:54:07 pm
content: The placement of some of the components to me seem very similar to this other one torn down by Diodesgonewild:https://www.eevblog.com/forum/dodgy-technology/new-powersuply-from-china-if-you-think-you-saw-it-all-unbelievable/msg3454624/#msg3454624I wonder if they came out of the same factory or from the same designer.

author: amyk
author_rank: Super Contributor
timestamp: April 14, 2021, 11:49:06 pm
content: Could be a common/reference design. 24V PSUs of that shape and power are not exactly a rare product.

author: AmnevaR
author_rank: Contributor
timestamp: April 15, 2021, 09:08:17 am
content: Those power supplies are common as mud. You'd want to don't turn it on take it apart firstWatch out for solder balls! I've seen some of them stuck in flux or silicone near capacitors.
Rectenna - 5G power grid for IoT? - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: March 30, 2021, 02:19:37 pm
content: Leveraging the 5G Network to Wirelessly Power IoT Devices:https://www.news.gatech.edu/2021/03/25/leveraging-5g-network-wirelessly-power-iot-devices

author: AVGresponding
author_rank: Super Contributor
timestamp: March 30, 2021, 07:20:07 pm
content: I look forward to being able to power a basic LCD-screened calculator from this instead of an in-built solar cell. Surely the world's energy woes are solved!EDIT: Doesn't 5G require a tracked paired device to aim at?

author: Cyberdragon
author_rank: Super Contributor
timestamp: March 30, 2021, 08:03:22 pm
content: Quote from: AVGresponding on March 30, 2021, 07:20:07 pmDon't you look forward to your IOT calculator tracking your accounting and sending it back to China?

author: SiliconWizard
author_rank: Super Contributor
timestamp: March 30, 2021, 11:03:53 pm
content: Quote from: Cyberdragon on March 30, 2021, 08:03:22 pmWhether you're looking forward to it or not...

author: AVGresponding
author_rank: Super Contributor
timestamp: March 31, 2021, 07:38:42 pm
content: Good luck to them, watching me type in "5318008" and the like...
Power bank circuit  that let the magic smoke out - Page 1
Forum section: electronics / general

author: Danielradcliff
author_rank: Contributor
timestamp: March 27, 2021, 03:02:30 am
content: This power bank circuit was working fine until all of a sudden It irrupt it in sparks and fire and smokeThis power bank circuit board is from Amazon in the US I’m Sending it back to Amazon to get a new power bank circuit board hopefully This is a one time occurrence. Here’s a link to the power bank circuit board on Amazon see what you think about it everyone do you think it Technology doggy or decenthttps://www.amazon.com/dp/B08MXM75V1/ref=cm_sw_em_r_mt_dp_EAWAAV71F287ND39RG14?_encoding=UTF8&psc=1Hello if you notice that I edit my posts a lot it’s just how I think

author: Ian.M
author_rank: Super Contributor
timestamp: March 27, 2021, 04:01:34 am
content: There's a datasheet for the SW6106 PMIC that let the magic smoke out here:https://www.waveshare.com/w/upload/e/ed/SW6106_Datasheet_Release_DS008_v1.0.pdfYou can check if component values match the reference design and if your usage was pushing it too close to its rated limits.

author: Danielradcliff
author_rank: Contributor
timestamp: March 27, 2021, 04:05:27 am
content: Thank you

author: MrMobodies
author_rank: Super Contributor
timestamp: March 27, 2021, 05:04:22 pm
content: Just noticed this:https://www.amazon.com/dp/B08MXM75V1/ref=cm_sw_em_r_mt_dp_EAWAAV71F287ND39RG14?_encoding=UTF8&p;sc=1QuoteNot sure what they mean by "triggered by mistake" whether all the outputs are limited to 5v when more than one port is drawing power.