hybridfree/eevblog-posts huggingface dataset:
Sharkbanz2 - Page 1
Forum section: electronics / general

author: Ario
author_rank: Regular Contributor
timestamp: September 12, 2020, 10:29:46 am
content: Anyone also figures, this product is as fake as it comes?https://www.sharkbanz.com/

author: Raj
author_rank: Frequent Contributor
timestamp: September 12, 2020, 10:55:24 am
content: I'm not a marine biologists had they said 'it emits awful smell to deter shark' instead, I would have believed it.To bad, they claim to use magical electrical science.

author: Ranayna
author_rank: Super Contributor
timestamp: September 12, 2020, 03:13:52 pm
content: Well, sharks, among other fish, are indeed electro sensitive.I remember that some yeas ago there was a video that a submarine filmed. It showed a shark nibbling on an undersea cableApparently they had an issue with their cables and wanted to investigate, and they were very surprised to see sharks causing the damage.Though i have no idea how just strapping a magnet to your wrist will really help. I just have to hope they are under close scrutiny, considering that this is potentially very harmful.

author: Haenk
author_rank: Super Contributor
timestamp: September 13, 2020, 07:13:12 am
content: From the video: "patented magnetic technology".So, yes, this smells as a BS product at first.However, magnets do seem to work as shark repellant, if strong enough. Unfortunately it's not a 100% repellant, it's rather a nuisance for the shark. Depending on hunger, it will eventually fail.They even tested those personal devices:https://peerj.com/articles/5554/And yes, they don't really work.
Scalar energy for healing and whatever else? - Page 1
Forum section: electronics / general

author: Rx7man
author_rank: Regular Contributor
timestamp: August 05, 2020, 06:06:43 pm
content: Here's a doozie that's probably just a credit card phishing scam or something.. It shows a picture of Nikola Tesla so it must be good!https://www.spooky2scalar.com/free-ultimate-guide-to-scalar-energy/

author: Berni
author_rank: Super Contributor
timestamp: August 05, 2020, 07:10:37 pm
content: Aren't all kinds of energy a scalar value?What sort of energy has a direction so that it could be a energy vector instead.

author: Berni
author_rank: Super Contributor
timestamp: August 06, 2020, 05:53:00 am
content: Quote from: barycentric on August 05, 2020, 08:51:20 pmPyonting vector is the direction of a energy flux (in units W/m2). the other fields explain how energy changes in 3D space (since they exert a force, and so moving in space with a force applied takes or gives energy).Energy is measured in Joules, so if the thing is measured in some other unit that does not have some sort of direct tie back to Joules then it is something other than energy.It might seam sensible that a moving object with a velocity along some vector also has an kinetic energy pointing in the same vector. But if you take something like a tuning fork that oscillates with both of its prongs moving opposite of each other and sum the kinetic energy of both prongs as vectors you get a total kinetic energy in the fork as 0. Even tho there clearly is energy there and it can be used to move other things such as air to create sound. Energy often appears in math along side of vectors quantities (ie velocity and force) but that doesn't automatically make it a vector too (for example dot product operation used in kinetic energy produces a scalar result)And before you bring it up, yes energy can appear as a vector in quantum mechanics. It is used to make the weird quantum mechanics math work (Much like complex numbers are also used to make some of our other math work)
Elon Musk's Hyperloop - In 2020 for $25 take the Hyperloop from SF to LA 30 mins - Page 1
Forum section: electronics / general

author: DougSpindler
author_rank: Super Contributor
timestamp: August 06, 2020, 11:05:58 pm
content: Theranos or Hyperloop Which scam was bigger?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: August 06, 2020, 11:34:32 pm
content: AFAIK Hyperloop didn't endanger anyone's life.

author: DougSpindler
author_rank: Super Contributor
timestamp: August 06, 2020, 11:41:35 pm
content: Quote from: Alex Eisenhut on August 06, 2020, 11:34:32 pmDo we know how many people Elizabeth Holmes indirectly killed? We know of one employee. Do we know how many people her company's machine said didn't have cancer when they did? I know there were people who were told they had cancer and were treated when they didn't have cancer.

author: cdev
author_rank: Super Contributor
timestamp: August 07, 2020, 01:36:03 am
content: Cancer treatments are incredibly profitable. They are raising prices a huge amount simply because they know they can get away with it in this atmosphere of criminality.http://www.pharmamyths.net/_market_spiral_pricing_of_cancer_drugs__120860.htm

author: wraper
author_rank: Unknown
timestamp: August 07, 2020, 01:47:35 am
content: Why are you creating duplicate threads?https://www.eevblog.com/forum/renewable-energy/its-2020-sf-to-la-for-$25-on-elon-musks-hyperloop-are-you-buying-it/
Nikola motors electric truck - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 04, 2020, 08:00:17 pm
content: Setting off all sorts of bullshit detectors...

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: August 05, 2020, 03:46:24 am
content: Holy shitsnacks, justThe only reason they came out with the "badger" pick-up truck model is to ensnare retail investor numpties. Its all CGI.I am a "VISIONARY!" Trevor will hire other people to do the menial stuff, and will just collect money.Even theranos actually went through the motions of building prototypes. sheesh

author: RenThraysk
author_rank: Regular Contributor
timestamp: August 05, 2020, 11:31:49 am
content: Listened to part of their stock earnings call on the 4th.They had lost more than analysts expected and so the stock price was falling.And yet in the call, management are giving themselves congratulatory pats on the back for doing better than the analysts predicted?!

author: AVGresponding
author_rank: Super Contributor
timestamp: August 05, 2020, 05:19:59 pm
content: OFC!They lost MORE!More is always better, QED.
SCIO – Device (Medical wuwu thing..) - Page 1
Forum section: electronics / general

author: Bloody_Lyra
author_rank: Newbie
timestamp: August 04, 2020, 01:26:14 pm
content: I stumbled on this ad on ebay. Someone wants 5k for some electronic wuwu device.Without a look inside it looks like an uC that blinks some leds and has serial over USB.I think dave had something like this in some teardown.Here is the link, but I will translate the text and copy the images (I don’t know how long it’s online.https://www.ebay-kleinanzeigen.de/s-anzeige/scio-geraet/1473590516-224-9304The (translated) Text is: (additions from myself are in [these brackets])The device was purchased in early 2019 from Silke Polifka in Dormagen [Town in Germany].She is a worldwide known SCIO expert and frequently shows up at expert congresses.I have paid 7500 euros for the device including accessories and a new PC.I can’t work with my PC as good as always, because I have an eye disease. This is why I sell the device.The device is in good condition.The seller (Dr. Christoph Jaffke) from Stuttgart seems to be an English teacher at some school.This SCIO biofeedback devices seem to be a big thing in scam “medicine”.If I search for it on Google I find some hand scanner and a few pictures that shows a similar device. Often with keywords like “quantum” and “natural health”.Has someone a picture of what is really inside of this thing?(or even worse, does anyone knows someone who believes that this thing is good for something?)
Pipe dream wireless power in NZ - emrod - Page 1
Forum section: electronics / general

author: jastervoid
author_rank: Newbie
timestamp: August 05, 2020, 11:48:28 am
content: Pretty sure this tech is all marketing and no substance.https://newatlas.com/energy/long-range-wireless-power-transmission-new-zealand-emrod/

author: Psi
author_rank: Super Contributor
timestamp: August 05, 2020, 11:54:40 am
content: Wireless power using directional microwaves is real and can be done at quite high power, but it's hard to imaging a use case where it makes sense over other options, given the losses, complexity and safety issues.

author: mikerj
author_rank: Super Contributor
timestamp: August 05, 2020, 03:08:36 pm
content: QuoteThe microwave link may well be fine, but I'm a little dubious about the "laser safety curtain" working reliably in those conditions.Company name is uncomfortably close to Emerod, an old fashioned term for hemorrhoid
Asbestos in 946C Hotplate? - Page 1
Forum section: electronics / general

author: BenjaminJAnderson
author_rank: Newbie
timestamp: July 20, 2020, 03:33:59 pm
content: Hello!This is my first post so please tell me if I do anything wrongI recently purchased a cheap hotplate from banggood.https://www.banggood.com/200x200mm-946C-110-220V-850W-Hot-Plate-Preheat-Preheating-Desoldering-Station-for-PCB-SMD-Heating-p-1348275.html?rmmds=search&ID=515155&cur_warehouse=CZI was looking through the manual when I found this piece of text"石棉"in the component breakdown.Is there really asbestos in this product?? or is this a misstranslation. I don't particularly want to open up the product to check.How dangerous/detrimental is this product to my health?Hopefully this isn't a stupid question.

author: AVGresponding
author_rank: Super Contributor
timestamp: July 20, 2020, 04:47:40 pm
content: Asbestos is usually only dangerous when it's disturbed, as this causes microscopic fibres to get into the air and inhaled.It is however not legal to use it in products in the UK, so if the translation is accurate, it's quite a serious breach.You should contact your local trading standards, who can arrange for the suspect material to be tested if necessary.You should not under any circumstances attempt to disassemble the device.

author: amyk
author_rank: Super Contributor
timestamp: July 20, 2020, 11:58:13 pm
content: The Chinese characters for asbestos literally mean "rock wool" which unfortunately also refers tohttps://en.wikipedia.org/wiki/Mineral_wool. Looking at the diagram, it does not appear to be in a friable form. Either way, not something I'd be worried much about. If it is asbestos, it is going to be chrysotile (the far less dangerous form; the others were banned and all mining stopped many decades ago) and looks like it will be in a molded plate.

author: Cyberdragon
author_rank: Super Contributor
timestamp: July 21, 2020, 05:05:11 am
content: I assumed that as well, but with no expertise in Chinese was not sure. People also still call fiberglass insulation "rock wool" since it originally used to be asbestos.

author: AVGresponding
author_rank: Super Contributor
timestamp: July 21, 2020, 05:01:46 pm
content: Quote from: amyk on July 20, 2020, 11:58:13 pmSorry, but all forms of asbestos have been illegal to import and use in the UK since 1999.If this is indeed asbestos, the importer and vendor are both in breach of the law.
Y-CAM strips away web portal (app only) - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: July 08, 2020, 04:07:03 am
content: I was given a camera a couple of years ago pulled out of a job, it had 7 day recording free online storage. Y-cam discontinued it the free recording and wanted £10 a month to renew. I needed something temporary last year and found it was reduced to £2 a month for 2 weeks of footage. Some months ago it stopped working, I think it was early February or March. Just a blinking red light but there was a powercut that day, let me guess maybe it was doing a firmware update during the powercut and became bricked. I forgot about it during the lockdown but now when I went to look to cancel the subscription I found this message:QuoteI didn't notice that message at the time.The "APP" on my phone had nothing but problems, it would hang on playback even with the updates that went by but it only worked well at showing live footage that's all.Anyway I think it is very poor to offer one mode of access to a cctv system.What if the APP stops working due to changes in the operating system of the phone/tablet or even on a global scale.One incentive not to buy and not even use lockedown managed camera's when things like this are away.

author: Halcyon
author_rank: Unknown
timestamp: July 08, 2020, 09:59:00 am
content: Yep, typical IoT technology. Perfectly good hardware is rendered completely useless because of dependence on some "cloud" or activation server somewhere. When that service disappears or the company decides to no longer support your product, you're left with a paperweight.My opinion is, if you buy a product, the product should do the thing that it was designed to do, for eternity, regardless of what happens to the company.

author: MrMobodies
author_rank: Super Contributor
timestamp: July 08, 2020, 07:07:56 pm
content: I would never buy anything like this in fact I was against it when I found out it was brought without me knowing. Someone thought they could just buy it, mount it anywhere, without any means of power or network connection and that was when it was dumped on my desk and asked to make it work.The picture wasn't great more like 480p but it had a microphone.I was trying to find the original firmware for it years ago so I could join it to an IP recorder but found too many firmware versions for different pcbs that didn't match and it had I think the controller was called "Grains".Just looked on Trustpilot many complaints 30% bad 5% poor.https://uk.trustpilot.com/review/www.y-cam.comIt looks like they are trying to reduce the debt over the years and Era Home Security Limited took over in February 2019.https://suite.endole.co.uk/insight/company/06039855-y-cam-solutions-limitedhttps://beta.companieshouse.gov.uk/company/06039855/officers
Charmhigh: the $17,000 pick and place machine that doesn't work - Page 1
Forum section: electronics / general

author: Kean
author_rank: Unknown
timestamp: June 30, 2020, 02:06:13 am
content: For reference, this is already being discussed herehttps://www.eevblog.com/forum/manufacture/charmhigh-t560p4-pnp-problems/And herehttps://www.eevblog.com/forum/manufacture/chmt-560p4-pick-and-place-please-share-your-experiences-here/
Oneplus 8 sees through objects... - Page 1
Forum section: electronics / general

author: Raj
author_rank: Frequent Contributor
timestamp: May 14, 2020, 08:30:04 pm
content: But a dodgy tech but, someone tries oneplus 8 ir camera, and was able to see through some plastics, opaque to naked eye.CCTV cameras had the ability since ages (only an ir pass through filter was required)And the media makes a show out of it as if it's a quantum age cutting edge tech.Kinda makes us people who've been modding cameras since ages to do the same, look like dorks.

author: AVGresponding
author_rank: Super Contributor
timestamp: May 15, 2020, 11:49:43 am
content: It just makes me wonder if any serious general media organisation bothers to check the scientific credentials of their correspondents any more.The answer would seem to be mostly not.

author: Raj
author_rank: Frequent Contributor
timestamp: May 22, 2020, 05:41:16 am
content: They softpatched it away...keep your internet off, if you have one

author: Ultrapurple
author_rank: Super Contributor
timestamp: June 04, 2020, 12:25:00 pm
content: When I was a boy, theExchange & Martweekly small-ads paper had an advert offering details of an "amazing invention that lets you see through walls", inviting the reader to send about six months' pocket-money for "plans".I am glad I didn't waste my money. It took years, but eventually I realised they were probably selling you information about a window.

author: Canis Dirus Leidy
author_rank: Regular Contributor
timestamp: June 07, 2020, 02:54:46 pm
content: Quote from: Ultrapurple on June 04, 2020, 12:25:00 pmIf it was the same company that advertised (in seventies) a device that allowed you to see through walls up to 25 cm thick, then, as the magazine "Chelovek i Zakon" wrote, the buyer received a toy telescope and drill, 25 cm long.

author: Ultrapurple
author_rank: Super Contributor
timestamp: June 11, 2020, 09:54:16 am
content: Re the original post: this general topic waslooked at in the Thermal Imaging forumand some interesting stuff came up - but a stock cellphone isn't going to replace medical X-Rays (or whatever) anytime soon.

author: Raj
author_rank: Frequent Contributor
timestamp: June 12, 2020, 07:09:55 am
content: Quote from: Ultrapurple on June 11, 2020, 09:54:16 amYup completely different end of the spectrum, literally, can't compare near ir to x-ray

author: ArthurDent
author_rank: Super Contributor
timestamp: June 20, 2020, 08:53:43 pm
content: You could use a low tech solution that I remember seeing in the back pages of magazines in the 1950s.
Conscious Spaces using England European Regional Development Funds - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: June 17, 2020, 11:15:30 pm
content: I was shown a dodgy site by a friend promoting some EMF products such as coils wrapped around wood and air freshners with bacteria in them.https://consciousspaces.com/collections/emf-protectionI was looking on careers.QuoteI am wondering is this is true.Are they transfering the money out of the sales to poorer counteries or just helping themselves.What do you think?Also checkout the Walnot thing:https://consciousspaces.com/collections/emf-protection/products/qi-me-emf-protectionDouble blind study claim:QuoteI haven't seen them as of yet placing their products on their stock? photos like the others.

author: Haenk
author_rank: Super Contributor
timestamp: June 18, 2020, 10:32:08 am
content: Oh boy, this leads to yet a larger network of questionable products, like this:https://www.echo-h2.de/https://www.waveguard.com

author: Stray Electron
author_rank: Super Contributor
timestamp: June 18, 2020, 10:54:19 am
content: The words "Sales Professional" should tell you everything that you need to know. The income from Sales jobs is almost always based on the amount that you sell. So basically they've come up with ridiculous idea and are looking for suckers, er ah, Sales Professionals, to go try and sell their product or services but the Sales Professional doesn't earn anything unless that actually sell something. Also in many cases the potential Sales Professional is required to take,and pay for, expensive classes from them before they can start working.
New mobile "High quality" airconditioning that you can take with you everywhere. - Page 1
Forum section: electronics / general

author: conducteur
author_rank: Regular Contributor
timestamp: July 04, 2020, 06:36:31 pm
content: This company is advertising on Youtube (in Belgium). They tried to reïnvent the weel but failed to do so.https://getpolaire.com/They claim that the aircon that consumes only 7.5-12.5W can compete with "real" airconditioning installations with an in- and outdoor unit. Do you smell bullshit too?

author: 0xdeadbeef
author_rank: Super Contributor
timestamp: July 04, 2020, 06:45:29 pm
content: Just an evaporative cooler. They were sold everywhere in last summer. Obviously they are not nearly as effective as a real AC and increase humidity which is something you don't really want when it's hot (unless you live in a very dry climate zone). Besides, with humidity increasing, this approach also becomes less and less effective.

author: jmelson
author_rank: Super Contributor
timestamp: July 05, 2020, 02:03:28 am
content: One of the NASCAR racers built a rig to keep him cool in the race car. It was a picnic cooler full of ice and a small pump. He put some kind of tubed panel, likely from some medical device up his back under the nomex jacket. I don't know if this got banned, or now everybody uses them. Such a rig would be trivial to build.Jon
Paper on noninvasive blood glucose monitoring. Hoax? - Page 1
Forum section: electronics / general

author: JimRemington
author_rank: Regular Contributor
timestamp: August 27, 2020, 03:28:43 pm
content: This paper sure looks like a hoax to me, and interestingly, it uses the exact same technique, used the world over to monitor blood oxygen saturation through a finger tip. But there, you have the dramatic change of hemoglobin absorbance to monitor.https://ieeexplore.ieee.org/document/9103375Look for a crowd funded project soon!PDF attached.

author: Haenk
author_rank: Super Contributor
timestamp: August 28, 2020, 06:20:36 am
content: This does not seems dodgy to me.I scrolled through quickly, and after all they are comparing the inner tissue reflection of two different wavelength; one being absorbed by sugar, one not (to normalize the length of the light path).

author: JimRemington
author_rank: Regular Contributor
timestamp: August 28, 2020, 04:17:55 pm
content: After doing more research on the topic, the idea to measure blood glucose by light scattering has been explored for several years, but has evidently never worked well enough to be reliable. I conclude that the authors of the paper I cited are amateurs engaged in wishful thinking, insufficient experimental work and sloppy reporting.This 2018 paper uses the same basic idea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6116315/In the 2018 paper, the apparatus, experimental methods and measurements are vastly better documented but the result statistics reveal the basic problem.
za-pet advertising quackery as a virus zapper  - Page 1
Forum section: electronics / general

author: Kiwi_frog
author_rank: Contributor
timestamp: April 10, 2020, 12:25:59 am
content: This site is selling an overpriced square wave generator as a cure-allza-pet.com/buy-now. The "tech" is based on Hulda Regehr Clark's quackery who ironically died from blood and bone cancer, yep this unit really cured that cancer.They have added lots of info to make it sound like this $235 buzzer is doing something special"Our zapper uses a standard 9 volt battery to power a 30 kHz (50%) square wave frequency generator whose output is offset by 0.25 volt so that the polarity is always positive. The batteries generally have 9.2 volt when new, our zapper can output almost 9 volts where as our competitors are lucky to output 7.5 volts, which is important when you realize that you need at least 5.5 volts to get past the skin’s natural resistivity."These are the sort of people that would claim 5G is a virus trigger, so lets shock the virus away."For users to feel the voltage would require in the order of 25 volts which is unacceptable when you consider that to kill a virus only requires a voltage of 6-9 volts at a current of only 0.0001 Amps, that’s 100th of one millionth of an amp. Our zappers put out approx 15-20 mA which is still 20,000 times higher than that required to kill viruses."Dave do your worse.

author: Kiwi_frog
author_rank: Contributor
timestamp: April 10, 2020, 12:41:40 am
content: The original unit is extremely simple, there is no way they can justify that price.

author: Domagoj T
author_rank: Frequent Contributor
timestamp: April 10, 2020, 10:10:29 am
content: Any Kiwis want to introduce those guys to your local regulatory bodies?

author: rrinker
author_rank: Super Contributor
timestamp: April 10, 2020, 07:53:14 pm
content: Wait, first radiation is CAUSING viruses, now radiation will KILL the viruses? Which is it?ALso, if it's outputting a 9V p-p square wave, how does a .25V offset make it always positive? Either it goes from 0 to +9 or close to that, never below 0, or if it is a square wave centered around 0, it would take a 4.5V offset to raise the lowest level to 0 so it never goes negative. What am I missing here?

author: Cyberdragon
author_rank: Super Contributor
timestamp: April 10, 2020, 09:36:44 pm
content: Quote from: rrinker on April 10, 2020, 07:53:14 pmThe fact that the people making this are stupid and don't know real science or mathmatics.

author: amyk
author_rank: Super Contributor
timestamp: April 11, 2020, 02:35:24 am
content: If 15-20mA actually passed through you, you'd be convulsing and soon dead. Even the Big Clive couldn't take more than ~14mA in a very ill-advised experiment he did...

author: fzabkar
author_rank: Super Contributor
timestamp: May 25, 2020, 10:37:52 pm
content: Quote from: Kiwi_frog on April 10, 2020, 12:25:59 am0.0001 amps is one 10th of one thousandth of an amp.
yet another 5G blocker - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: May 21, 2020, 10:39:22 pm
content: https://hackaday.com/2020/05/21/dont-worry-this-box-will-protect-you-from-5g/http://www.quackometer.net/blog/2020/05/unboxing-a-5g-protection-device.htmlMaybe it's time to resell aluminum window screen and aluminum foil as 5G blockers? It would actually work...

author: Raj
author_rank: Frequent Contributor
timestamp: May 22, 2020, 02:57:13 am
content: As if 5g signals aren't already attenuated by literally everything.

author: Haenk
author_rank: Super Contributor
timestamp: May 22, 2020, 06:22:44 am
content: You get some nice copper plumbing, which is more than I expected (a cheap "magic stone" would have worked as well, I guess).

author: Raj
author_rank: Frequent Contributor
timestamp: May 22, 2020, 06:55:45 am
content: Meanwhile, in India, my good old drain pipes are asbestos based pipes with lead seals and fresh water pipes are galvanised steel and walls of brick... Some freaks use pvcOn the plus side, my walls don't catch fire and it doesn't cost an arm or leg to install/repair it.No wifi signal can go through 2 walls of mine.I have 3 routers in my house :p5g? Forget about it, I'd have to stand on my roof in 38degree centigrade sun just to watch a cat video

author: AVGresponding
author_rank: Super Contributor
timestamp: May 22, 2020, 11:10:01 am
content: Can't beat a good cat video...Galv steel for drinking water?!?Hope you have a means of filtering out the black sludge!

author: Raj
author_rank: Frequent Contributor
timestamp: May 22, 2020, 02:05:25 pm
content: Quote from: AVGresponding on May 22, 2020, 11:10:01 amYup...I do have an RO...Btw...if you leave a tap. unused for an year, when you open it, noting but red rusty water comes out of it.

author: Cyberdragon
author_rank: Super Contributor
timestamp: May 24, 2020, 04:50:32 am
content: Quote from: Raj on May 22, 2020, 02:05:25 pmWent to an old hotel once that had that problem. Came out of the taps, the shower, in the toilet.
Concious Spaces £4,999.00 Qi-Max EMF Protection - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: June 17, 2020, 11:24:54 pm
content: https://consciousspaces.com/products/qi-max-business-emf-protectionQuoteQuoteQuote£4,999 for 20kg of copper over bit of wood.Other wild claims:https://healthyh2infusedwater.com/emf/Quote
Wink: IoT vendor lock-in scam - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: May 08, 2020, 01:59:18 am
content: https://hackaday.com/2020/05/07/ask-hackaday-wink-hubs-extortion-as-a-service/Just one of the many reasons why I advocate for IoT to be based around open source software that the user has complete control over. Or as some say, make it a LoT - LAN of Things.
"Flexible Wearable Charger": "Energy Harvesting" never gets old - Page 1
Forum section: electronics / general

author: Zeitungsjunge
author_rank: Newbie
timestamp: May 03, 2020, 05:16:43 pm
content: Another "energy harvesting" free energy from body movements dream on kickstarter...Will they never learn?https://www.kickstarter.com/projects/1074819525/wearable-charger

author: PlainName
author_rank: Super Contributor
timestamp: May 03, 2020, 09:57:53 pm
content: This one seems pretty straight up and can't fail. Spend $13K and you will get that perk, no question. What's not to like?

author: Haenk
author_rank: Super Contributor
timestamp: May 04, 2020, 05:42:51 am
content: Quote from: Zeitungsjunge on May 03, 2020, 05:16:43 pmAt least they don't promise a "final product". It's just "send me money, so I can spend it (on reasearch?)".Interesting, but not a great way to harvest energy, IMHO.

author: AVGresponding
author_rank: Super Contributor
timestamp: May 04, 2020, 12:40:29 pm
content: Quote from: Haenk on May 04, 2020, 05:42:51 amLooks like it might be a good way to harvest other people's cash though...
Hulda Clark "Zappers" - Page 1
Forum section: electronics / general

author: donotdespisethesnake
author_rank: Super Contributor
timestamp: May 12, 2020, 04:26:04 pm
content: Seems that Crazy FoolHulda Clarkinvented "zappers" which can cure anything.https://www.zapperstore.com/dr-clark-zapper/hulda-clark-zapper-elzappQuoteAlthough the product page says :QuoteThat should satisfy the FDA.AFAICT, a zapper just sticks some juice through the body. Different frequencies "cure" different diseases...

author: Cyberdragon
author_rank: Super Contributor
timestamp: May 12, 2020, 04:39:37 pm
content: https://www.eevblog.com/forum/dodgy-technology/za-pet-advertising-quackery-as-a-virus-zapper/

author: donotdespisethesnake
author_rank: Super Contributor
timestamp: May 12, 2020, 04:46:20 pm
content: Huh, there seems to be several sites selling variations of these zappers.It seems that humanity has a whole new layer of stupidity I wasn't aware of !

author: amyk
author_rank: Super Contributor
timestamp: May 12, 2020, 11:42:33 pm
content: Every time I see that name, I can't stop thinking of this...https://scienceblogs.com/insolence/2009/10/27/requiem-for-a-quack-part-ii
ANENG AN888S Bench Multimeter uhm.. Built in Sub-Woofer? - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: March 29, 2020, 02:39:57 am
content: https://www.aliexpress.com/item/4000343031770.htmluhm... Right.... A Bench Multimeter.... With a sub-woofer?Aneng = a decent brand, Dave himself praised the tiny handheld AN8008...But this has got to be a joke.... Built in alarm clock and subwoofer

author: ebastler
author_rank: Super Contributor
timestamp: March 29, 2020, 08:00:28 am
content: Meets a clear market need -- every electronics engineer hs always wanted a multimeter on their nightstand...It has been discussed here a while ago:https://www.eevblog.com/forum/testgear/what-new-aneng-an888s-combines-multimeter-bluetooth-speaker-and-clock/

author: Unknown
author_rank: Unknown
timestamp: March 29, 2020, 05:27:37 pm
content: Quote from: ebastler on March 29, 2020, 08:00:28 amOh... I did a search for an888s...must have only searched this part of the forum. Thanx

author: rrinker
author_rank: Super Contributor
timestamp: March 31, 2020, 03:54:05 pm
content: Needs a big snooze button on top to use bedside though.If I didn't have a PC with speakers on my workbench - listen to some music while I take some measurements....If it was only on the Aneng page, I'd be tempted to say April Fools.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: May 03, 2020, 11:06:00 pm
content: I wonder what's worse.A Talking Toaster or a babbling multimeter.Proabably depends on who you ask.Mr Potatohead likes talking toasters, while Lister does not.

author: Cyberdragon
author_rank: Super Contributor
timestamp: May 04, 2020, 05:42:44 am
content: Does it even have a built-in radio, preferably AM/FM and satellite? I mean these guys don't know the first thing about feature creep. Where's the cupholder?

author: Haenk
author_rank: Super Contributor
timestamp: May 04, 2020, 05:46:58 am
content: Quote from: Cyberdragon on May 04, 2020, 05:42:44 amDoh, it's right there. Put it on its back, so the circle-ly thing is on the top, you can even adjust the temperature, it seems.However I do miss the Swiss-Army-Knife part, but maybe that one is hidden on the bottom side.
VIZIV Wireless power - Page 1
Forum section: electronics / general

author: Wimberleytech
author_rank: Super Contributor
timestamp: May 09, 2020, 03:34:15 pm
content: Here is something going on here in Texas. Tesla risen from the grave.https://vizivtechnologies.com/science/utilizations/energy/Lots of provisional patent applications.Here is one:https://patents.google.com/patent/US20160079769A1/en?oq=20160079769Enjoy!!

author: AVGresponding
author_rank: Super Contributor
timestamp: May 10, 2020, 08:42:54 am
content: I believe this utter bollocks also goes under the name of "Texzon", and is already covered in this thread:https://www.eevblog.com/forum/dodgy-technology/bullshit-texzon-wireless-power/

author: Haenk
author_rank: Super Contributor
timestamp: May 10, 2020, 11:56:23 am
content: Certainly they do - their old website redirects to this new BS.

author: Wimberleytech
author_rank: Super Contributor
timestamp: May 10, 2020, 02:15:05 pm
content: Quote from: Haenk on May 10, 2020, 11:56:23 amYup...appears that they changed their name. Prolly change it again before it is over.

author: AVGresponding
author_rank: Super Contributor
timestamp: May 10, 2020, 04:50:57 pm
content: Quote from: Wimberleytech on May 10, 2020, 02:15:05 pmProbably change it every time their negative comments > newfoolsinvestors.
Maybe not dogy after all: LED brain stimulators - Page 1
Forum section: electronics / general

author: Haenk
author_rank: Super Contributor
timestamp: June 08, 2020, 08:05:29 am
content: https://www.cell.com/neuron/fulltext/S0896-6273(19)30346-0However this does not make flashing junk from Kickstarter any better, it's just that the general idea might work after all...
Jadis of France  PA100  $14,900 - Page 1
Forum section: electronics / general

author: Haenk
author_rank: Super Contributor
timestamp: April 29, 2020, 05:20:50 am
content: Expensive, but not dodgy.Ultra-low production run, plus costly product finish, plus not-so-cheap components, plus "work of art", plus the "I need this" on top.If you divide the development costs by the low production number and add the part costs, I bet they don't make a huge amount of money on this.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: April 29, 2020, 07:35:20 am
content: It's a Carver Silver Seven, with more silver!

author: Ranayna
author_rank: Super Contributor
timestamp: April 29, 2020, 10:06:22 am
content: What cheap shit:https://en-de.sennheiser.com/sennheiser-he-1

author: dropkick
author_rank: Contributor
timestamp: April 29, 2020, 06:51:35 pm
content: More expensive "art" just sitting in the dust on the floor. I don't get it. These men can't be married. The wife wouldn't stand for this mess scattered about the living room. Buy a damn table!
Programmed with Phi energy  -- ohhh ok, got it! - Page 1
Forum section: electronics / general

author: DrG
author_rank: Super Contributor
timestamp: April 21, 2020, 02:34:43 pm
content: Forgive me if this has been brought up before, I did look...these energydots, smartdots, whatever...EDIT: as noted, there is already a thread on this type of "product"https://www.eevblog.com/forum/dodgy-technology/smartphone-emi-blocking-sticker/(fromhttps://www.energydots.com/products/smartdot/)(fromhttps://techhouseholds.com/smartdot-i-took-my-sons-phone-away-radiation-2/)Sure, it has been debunked -https://medium.com/hacksters-blog/how-to-spot-pseudoscience-on-the-internet-e7d1f53796a2Here is the ASA Adjudication on Phi Harmonics Ltd from 6 years agohttps://www.asa.org.uk/rulings/phi-harmonics-ltd-a13-253081.html..and still....https://www.energydots.com/*sigh* I don't know why these things get me so angry, I suppose it is just the perception of a declining standard of proof and greed.

author: Cyberdragon
author_rank: Super Contributor
timestamp: April 21, 2020, 03:52:50 pm
content: https://www.eevblog.com/forum/dodgy-technology/smartphone-emi-blocking-sticker/
EarthCalm SCAM - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: June 29, 2019, 09:28:59 pm
content: QuoteTake a look at this "review":https://shop.earthcalm.com/Home-Protection-Products.htmlQuoteThat page has been on archive.org since late 2016:https://web.archive.org/web/20161224001204/https://shop.earthcalm.com/Home-Protection-Products.htmlIt wasn't even on there so it was before the review.Check this out:That image has been available since March 2012 and the highest resolution one is on SYSPLUS NOMINA:http://sysplus.com.co/productos/sys-plus-nominaTranslated:https://translate.google.co.uk/translate?hl=en&sl=es&u=http://sysplus.com.co/productos/sys-plus-nomina&prev=searchTheir products are so good they have to fabricate the reviews.

author: Gregg
author_rank: Super Contributor
timestamp: June 30, 2019, 01:20:11 am
content: I love that the spokesperson is April F. Maybe this is just one big April Fools prank.

author: MrMobodies
author_rank: Super Contributor
timestamp: July 02, 2019, 07:31:22 pm
content: April fools prank forfoolsor anyone who doesn't get the hint.

author: katk
author_rank: Newbie
timestamp: April 20, 2020, 03:26:59 pm
content: This is a total scam. Please consider trying to have a conversation with customer service prior to purchasing. Maybe some distributors are good hearted people who are not informed-- that or they are just in to the money they can make from selling this scam. The only thing you will get out of customer service is to look at the website. So as you navigate the website, if you ask questions, you get directed to website verbiage. I was unsure if customer service was AI, as they are unable to give any words that are not direct quotes from the website. If you are not impressed with the website or have any additional questions, just save yourself the frustration and look at the many other products out there that are manufactured by people who know their stuff and really want to help people with EMF. You will have to do your research...and ask the right questions....but they are there. EarthCalm is not one of them.

author: Haenk
author_rank: Super Contributor
timestamp: April 20, 2020, 07:12:19 pm
content: Quote from: katk on April 20, 2020, 03:26:59 pmOf Course. That's why this sort of stuff ends up in the "dodgy" department. It's presented here for the LULZ andandand
EMF protection, and water filtration from a Shungite Nugget... - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: April 18, 2020, 03:09:43 pm
content: https://www.ebay.com/itm/264606394097

author: Cyberdragon
author_rank: Super Contributor
timestamp: April 18, 2020, 04:01:46 pm
content: It's almost pure carbon, it does in fact absorb some waterborne impurities. (not that I would trust it over modern filtration/sterilizatiom).Quote"EMF protection"...not so much. These nutters need to all be put in a giant farady cage and wonder why "my phone don't work".

author: Unknown
author_rank: Unknown
timestamp: April 19, 2020, 04:49:07 am
content: It's.. Beyond stupid...https://www.banggood.com/Dreame-V9-Cordless-Handheld-Vacuum-Cleaner-from-Xiaomi-Youpin-with-20000Pa-Suction-100000RPM-Brushless-Motor-p-1409219.htmlKinda like that doohickey that is supposedly using a 100k rpm motor.... lol

author: Haenk
author_rank: Super Contributor
timestamp: April 19, 2020, 06:51:00 am
content: There are plenty of 100k rpm motors out there, it seems. (But that will be without load, I guess.)Xiaomi is in most cases a rather innovative company and one of the more trustworthy chinese companies.So I'd say it's quite possible they put such a motor in there.This Aliexpress offer has some Details on such a motor:https://www.aliexpress.com/i/32963020250.html
Laser wrist thingy to treat Diabetes .... hm..... - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: April 11, 2020, 02:22:15 am
content: https://www.aliexpress.com/item/32899152621.htmlOk, this claims to cure: Rhinitis Diabetes Hypertension Thrombosis CholesterolRight... nose plugs... that glow..More attachments, I wonder if they have one that goes up your rear end....Call me skeptical...

author: babysitter
author_rank: Frequent Contributor
timestamp: April 11, 2020, 08:08:45 pm
content: Insert "Idiorcracy" joke here.

author: AVGresponding
author_rank: Super Contributor
timestamp: April 12, 2020, 03:04:21 am
content: - waits for bigclive to test one to destruction -

author: Cyberdragon
author_rank: Super Contributor
timestamp: April 12, 2020, 04:49:34 am
content: Quote from: AVGresponding on April 12, 2020, 03:04:21 amwaits for StyroPyro to add an actual high power laser
Fake UVC lamps... - Page 1
Forum section: electronics / general

author: ivi_yak
author_rank: Regular Contributor
timestamp: April 30, 2020, 12:35:06 am
content: latest one looks like a dildo

author: richnormand
author_rank: Unknown
timestamp: May 01, 2020, 09:30:07 pm
content: Got a few UVA (315-400nm) LEDs specified at 360nm for about half the price when compared to other mainstream sources. I was happy to see the seller was indeed accurate.Here is my setup to measure them. Once you get to UVB (280-315nm) and for UVC (100-200nm) in particular, the quartz or sapphire windows as mentioned in the videos.True UVC LEDs are pretty low power so you would need severals. Considering the price the real alternative is still a gas discharge tube for bang to the buck ratio.

author: Zero999
author_rank: Super Contributor
timestamp: May 03, 2020, 10:22:40 am
content: Old news. If you see any LED disinfection lamps on ebay or Amazon they will be fake. At the moment, UVC LEDs are too expensive an inefficient to compete with mercury lamps, in most applications.

author: Someone
author_rank: Super Contributor
timestamp: May 03, 2020, 11:07:40 am
content: Quote from: Zero999 on May 03, 2020, 10:22:40 amThere will be some legitimate ones, and then this comment on the video:QuoteGoing back to Master Clive's coverage that predated the current mania:

author: Zero999
author_rank: Super Contributor
timestamp: May 04, 2020, 08:25:54 am
content: Quote from: Someone on May 03, 2020, 11:07:40 amI very much doubt it given the price of real UVC LEDs. Even if there are some genuine ones, I wouldn't bother because they will have a pitiful power output and efficiency, compared to a mercury lamp of a similar price/power rating. Perhaps in 10 years time there will be UVC LEDs cheap and efficient enough to compete with mercury lamps in most applications, but for now they're an immature technology with a few niche applicationsQuoteYes, I've seen that one before and I did think it was odd because even before this pandemic, UVC tubes were generally more expensive than UVA ones. I suppose it might have been a lack of understanding or someone having a surplus of UVC tubes they were desperate to sell at whatever cost.
Long range gold detector Bionic X4 - Page 1
Forum section: electronics / general

author: Manul
author_rank: Super Contributor
timestamp: April 02, 2020, 12:32:08 am
content: This is beyond words. Even more surprising is that this company seems to be located in Germany. They have a lot of other products. And they have headquarters inside a pyramid building. What the hell is all this? You decide.Bionic X4 detector:https://www.okmdetectors.com/products/bionic-x4/Bionic X4 demo:OKM detectors:And if someone is interested to buy, I found Bionic X4 price

author: Haenk
author_rank: Super Contributor
timestamp: April 02, 2020, 05:48:41 am
content: This seems to be a legit company with a lot of detector products like ground radars and magnetometers. And with plenty of money on hand.However I would rather thinks of April Fools.

author: Manul
author_rank: Super Contributor
timestamp: April 02, 2020, 01:18:37 pm
content: Quote from: Haenk on April 02, 2020, 05:48:41 amWell, this is definetly not an April Fools joke. Not by me, not by them. You can easily check it by googling. Some of their other producs also gives suspicion, just not so openly.So the question remains, what is this and how can it happen in Germany, middle of Europe, middle of sunny day.Search for Bionic on their youtube channel:https://www.youtube.com/user/OKMDetectors/search?query=bionicAnd how about this random product then? Also very suspicious.

author: Manul
author_rank: Super Contributor
timestamp: April 02, 2020, 01:53:55 pm
content: I start to think myself, that everything about this company is a scam. Also someone in metal detecting forum said, that every product OKM sells is a scam.One more amazing product:

author: Haenk
author_rank: Super Contributor
timestamp: April 02, 2020, 02:30:28 pm
content: I stand corrected - they are obviously really trying to sell this "long range detector" for years.As for their other stuff, this mostly looked OK to me, this expendable detector might be a dual-magnetometer combined with high resolution (commercial) GPS, who knows...But it's hard to judge without a real test (using it with my own hands). Those promo videos are not to be trusted, that's for sure.

author: Manul
author_rank: Super Contributor
timestamp: April 02, 2020, 02:49:41 pm
content: If it is dual magnetometer with gps, $31,000 sure seems like a bargain

author: daqq
author_rank: Super Contributor
timestamp: April 03, 2020, 06:17:42 am
content: The faux Egyptian HQ only adds to credibility.
Reduce Electricity Bill Power Saving Scam - Page 1
Forum section: electronics / general

author: johnlsenchak
author_rank: Frequent Contributor
timestamp: March 31, 2020, 12:59:15 pm
content: Reduce Electricity Bill Power Saving Scam•Mar 31, 2020Reduce Bill Power Saving Scam

author: Raj
author_rank: Frequent Contributor
timestamp: April 01, 2020, 05:11:45 am
content: Dave and Big Clive have already beaten it to death
pointless cascade of charge pumps - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: March 23, 2020, 03:19:10 am
content: I was looking through some app notes on charge pumps and found this:https://www.maximintegrated.com/en/design/technical-documents/app-notes/4/4500.htmlIt looks like it turns -5V to +5V, then +5V to -3V. Each stage can unity current gain so what advantage does that arrangement have over a LDO?

author: amyk
author_rank: Super Contributor
timestamp: March 23, 2020, 04:57:53 am
content: One advantage is that you get to pay Maxim fortwoof their somewhat-pricy parts instead of one.

author: exe
author_rank: Unknown
timestamp: March 23, 2020, 08:00:48 am
content: Vendors are keen to sell you more of their parts. I think I've seen unnecessary complicated schematics from maxim too. For this reason I'm a bit skeptical about application notes -- designs are limited to what that vendor has in production. Competitors may have better deals, or do the same in less parts. Example: datasheet for LM74670-Q1 suggests an active rectifier build with four LM74670 parts, but lt4320 can do the same job in one IC (and costs a little bit less).EDIT: I also noticed that some parts from the same vendor are... complementary. I mean, it becomes sometimes easier to design things from parts from the same vendor because they match, say voltage levels, or specific features. Like voltage references from maxim may have remote sensing, which is probably meant to be used with their ADCs that has this feature (a dedicated pin to sense voltage right in the IC). Few other vendors offer such feature. So, if you want it, you have to use their parts. Though I don't know how much this improves precision.

author: Kleinstein
author_rank: Super Contributor
timestamp: March 23, 2020, 09:40:31 am
content: The application note circuits are not necessary good examples. They are more to show what could be done with the chips, even of there are better solutions. The quality of the example circuits goes from,overtoand