hybridfree/eevblog-posts huggingface dataset:
Scam or Credible product? - Page 1
Forum section: electronics / general

author: krish2487
author_rank: Frequent Contributor
timestamp: June 25, 2018, 11:21:08 am
content: Hello,I ran into this website after a colleague referred to it for energy harvesting.https://www.enocean.com/en/technology/energy-harvesting/I suspect it is another snake oil scam..Maybe someone more experienced can comment on whether such claims of extracting energy from motion and RF energy is practical?I suspect their modules are the low power and ultra low power modules hooked to a supercap and a COTS energy harvesting IC.

author: larsdenmark
author_rank: Regular Contributor
timestamp: June 25, 2018, 01:02:53 pm
content: As long as the power consumption is extremely low there is nothing wrong with energy harvesting. A button press or a single sensor read doesn't consume a lot of energy.There are more than 8000 videos on YouTube on "enocean" - a lot of these are made by themselves or their partners, but there are also a lot of videos I would consider independent. E.g. the one by Peter Oakes from 2014:I'm sure that someone would have figured out by now if it is a scam and written about it.

author: krish2487
author_rank: Frequent Contributor
timestamp: June 25, 2018, 02:05:53 pm
content: I stand corrected.. and got to learn something along the way! :-)Thank you @larsdenmarkIt didn't strike me to maybe check on youtube..

author: Maxlor
author_rank: Frequent Contributor
timestamp: June 25, 2018, 05:31:47 pm
content: EnOcean are for real, they've been around for many years, and their products are commercially available.I dimly remember Dave briefly checking out some of their hardware when it came as part of some energy harvesting kit from... Silabs maybe? Unfortunately I can't find it right now.

author: BrianHG
author_rank: Super Contributor
timestamp: June 25, 2018, 06:14:22 pm
content: Quote from: Maxlor on June 25, 2018, 05:31:47 pmDave doing a video on Peltier TEG device energy harvesting:

author: krish2487
author_rank: Frequent Contributor
timestamp: June 25, 2018, 08:50:26 pm
content: @brianHG and @maxlor.Thank you. I was uninformed. :-)Now I am little richer in information.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 25, 2018, 10:03:15 pm
content: The Enocean products have been around for many years. their main innovation was a RF receiver that could reliably receive very short packets produced by th eenergy-harvesting transmitters. The switch is a nice solution to avoiding batteries. I have one of their generator modules somewhere - it will produce a fairly bright LED flash when toggled.

author: innkeeper
author_rank: Unknown
timestamp: June 25, 2018, 10:09:23 pm
content: energy harvesting is real and has been around for a long time.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 25, 2018, 11:45:45 pm
content: ...but if anyone claims they can charge a phone with it, that's total BS
Paralleling loudspeakers without consequence - Page 1
Forum section: electronics / general

author: The Chump
author_rank: Contributor
timestamp: June 13, 2018, 10:34:00 pm
content: Apparently this product allows you to connect multiple loudspeakers in parallel to an amplifier without presenting a very low impedance.All without any configuration or setting-up or extra power - it's entirely passive.http://zerohmultispeaker.com/support.phpThru non-exhausive searches I have come to believe that it used to be known as BCS Multi Speaker Systemhttp://www.cggeorgallis.com/readNews.php?nid=119The patent is herehttps://patents.google.com/patent/EP2688313A1Amusingly, all the test results in the patent convince the inventor that it works. You may disagree. I disagree.They were at Infocomm this year (last week). They got a prize last year

author: Bassman59
author_rank: Super Contributor
timestamp: June 13, 2018, 11:27:47 pm
content: The data sheet says that it "eliminates the need for 70V - 100V transformer products," and the only way I can see this working is if the box contains those transformers.

author: Richard Crowley
author_rank: Super Contributor
timestamp: June 13, 2018, 11:50:33 pm
content: The claims for that gadget put it well beyond any commonly-known technology.If what they claim is true, then they have found a way to soundly defeat Ohm's Law.Free energy from the "zero point" (surely not far away from their "zero ohm") should be here soon.Even if the patent illustrations weren't over-compressed to lose many horizontal lines, the diagrams are pure gibberish. The fact that this patent was granted confirms that there are no technically-knowledgeable inspectors remaining in the USPTO. But we knew that already.

author: The Soulman
author_rank: Super Contributor
timestamp: June 14, 2018, 12:54:46 am
content: Glancing at the product for five seconds make me think it has a transformer transforming the input down to be able to drive low ohm loads.To bad a speaker ain't a resistor and multiple speakers often means some distance between em what means fairly long cable runs, bad combo for low ohms load.

author: The Soulman
author_rank: Super Contributor
timestamp: June 14, 2018, 12:59:13 am
content: Hold on, it does do:QuoteIn that case:

author: Brumby
author_rank: Unknown
timestamp: June 14, 2018, 02:47:29 am
content: I tried reading the description from the patent - but by the time I got half way my brain was threatening to throttle me.There are several mentions of capacitors and "high pass" - and I was beginning to wonder if I was looking at a crossover network. The unreadable diagrams did not help.There is also a claim of "no power loss" which I find fascinating.

author: Cyberdragon
author_rank: Super Contributor
timestamp: June 14, 2018, 04:18:43 am
content: The second diagram is mostly discernable if you fullscreen it.It's not even a proper crossover network, it's just two parallel RC filters separated by some large caps.There's a resistor and capacitor to ground, then through two bulk storage caps (in series parallel), then another resistor and capacitor to ground.
Genesys - Claiming to provide 20KW of power from a single 200W Solar Cell - Page 1
Forum section: electronics / general

author: Ranayna
author_rank: Super Contributor
timestamp: June 09, 2018, 12:24:02 pm
content: http://www.24-7pressrelease.com/press-release/453676/genesys-llc-announces-new-patented-renewable-power-generation-technology-that-eliminates-the-need-for-battery-storage-and-electrical-transmission-gridsThis system claims to be able to produce 20KW of power, with just a 200 watt solar cell and some waterIt claims you need no batteries anymore for your electric carsDrones with unlimited range and a payload of 100 kilogramsThat whole article reads like an episode of Star Trek, with all the technobabble...

author: janekm
author_rank: Unknown
timestamp: June 09, 2018, 12:31:17 pm
content: I'm not so sure... Seems to me that Star Trek technobabble sounds more believable than thisQuote

author: BravoV
author_rank: Super Contributor
timestamp: June 09, 2018, 12:40:27 pm
content: "High speed" current ... damn ... I want my slow speed current back.Its more natural like water current in the river.

author: janekm
author_rank: Unknown
timestamp: June 09, 2018, 12:48:45 pm
content: Reading a little further it becomes apparent that they are talking about using the capacitor-like properties of a solar cell to produce short pulses:http://www.genesys.co/images/pdf/Genesys_Self-Charging%20Car.pdf(2ms at 20000V is the example given). Not sure how useful a car that drives for 2ms at a time is though...

author: G7PSK
author_rank: Super Contributor
timestamp: June 10, 2018, 08:55:38 pm
content: Start up farming, where you claim to have a super invention then get some venture capital burn that as salaries and then fold.
ebay scam: DC-DC 3V/3.3V/3.7V/4.2V to 5V USB 2A Step Up power module - Page 1
Forum section: electronics / general

author: Axel1973
author_rank: Regular Contributor
timestamp: June 02, 2018, 02:50:59 pm
content: on 26. Dez. 2017 i bought three small and dirt cheap chinese 3V DC to 5V DC boost converter modules for USB from a chinese ebay vendor on ebay.de. the vendor was/is called "sensecore".Item No 272466346435Its a converter boost converter / step up converter module with two clearly labeled inputs (IN - and IN+) while hacing only a USB Port for output. so its supposed to output 5v strait, while input may vary from 3-5v .however...if you connect them as labeled, they instantly draw like ~680mA (or more if you let them) even without any load at the USB Port!! and the single chip gets HOT REAL FAST!with my usb microscope i was able to identify the chip and to look up a datasheet of some time, including an application note / demo schematics for how to use it.and since EVERY SINGLE ONE of them does not work just the same, i then tried to hunt down what is causing the high current and heating of the chip. i tried to follow the traces to see how the chip is connected (or at least somewhat like the schematics) and it dawned on me, that these cheap ebay scammers are selling rejects. boards that are assembled incorrectly.i found out, that the input coil was NOT connected to pins 1+2, but to7+8 (shorted). so this didnt made any sense.i looked around a little more and saw that the voltage divider too was not connected to the right pin (feedback).these retards put the chip 180° BACKWARDS and sell these boards on ebay. WTF ?!?! they NEVER passed any quality ensurance test.so i tested to rotate the chip with hot air and voila, the converter works! no heat, no high currents, works as described in the datasheet.BEWARE OF CHINESE EBAY VENDORS

author: bob225
author_rank: Frequent Contributor
timestamp: June 02, 2018, 02:59:46 pm
content: Its been going on for years - got a pile of failed boards stick them on ebay - or the factory scraps them, and the locals raid the bins and sell them off

author: Geoff-AU
author_rank: Frequent Contributor
timestamp: June 06, 2018, 08:14:29 am
content: My other favourite is the LM2596 step-down modules. The ebay ones are not LM2596, they're counterfeit and the oscillator frequency is wrong. They also have no thermal protection. To buy the IC legitimately through a retail channel costs more than the whole module, shipped, via ebay. No wonder they're fake. Seehereandherefor analysis others have done. I bought real LM2596 to make a buck converter of my own design.The old axiom "you get what you pay for" is still true. Sorry to be blunt, but if you buy $3 parts off ebay you should only be mad at yourself when it doesn't work out. How much is your free time (and sanity) worth? Isn't it better to spend a bit more and not have to deal with the extra debugging time, frustration and angst?
AfterMaster Pro - TV EQ box - Page 1
Forum section: electronics / general

author: Dave3
author_rank: Regular Contributor
timestamp: June 14, 2018, 03:34:46 pm
content: $180 voice EQ gizmo for your TV. Hear the difference!https://aftermasterpro.com/pages/listenNot really sure this is dodgy tech. In an ideal world, the gizmo would help my parents to hear the poorly mastered dialogue on their lousy TV speakers. I've tried a few different electronic EQ gadgets and have been universially disappointed.There are some good Amazon reviews and a few users indicating glitches. Nice marketing campaign and the gizmo seems to have a lot of parts inside. . .If the gizmo identified compressed blaring audio of adverts and muted them, that would be a winner and moved to the "Great tech" forum.From their site:https://aftermasterpro.com/products/aftermaster-pro"Aftermaster Pro dramatically improves the audio quality of your TV and was engineered to fix the problems commonly experienced with movies or TV audio — difficulty hearing dialogue, poor audio quality and the need to constantly adjust the volume.Improves Experience: Movies, TV Shows, Sports, and Live NewsHear everything you were meant to hear by the people who created your favorite contentExperience audio that is bigger, clearer, fuller and vastly more enjoyableFixes Common ProblemsAutomatically raises and clarifies TV dialogue while controlling the peak levels of special effectsNo need to continually adjust the volume to hear what people are sayingProvides a richness and depth to the music, effects and overall audio that isn't available from expensive audio equipmentNoticeably LouderVolume level and power consumption do not changePatented process improves audio throughout its entire frequency rangeAllows you to hear a sound presence you've never heard beforeAftermaster Audio TechnologyUnique audio process that takes sound to levels that couldn't be reached with even the best mastering techniquesRe-master all audio in real time and transform it to a whole new level-bigger, clearer, fuller, louder and more excitingNote:Not for use with ARC HDMI input ports. Aftermaster is not designed for use with a Smart TV who's only content source is internal wireless streaming. It is designed to go between a programming source (Cable Box, Roku, Apple TV, XBOX, Playstation, etc) and your TV or between your TV and add on speakers such as sound bars, etc."

author: Bratster
author_rank: Frequent Contributor
timestamp: June 15, 2018, 05:36:54 am
content: I have the basic version of that that is HDMI only with no battery. Was one of their Indiegogo backers.Overall I am disappointed with the quality of it. It feels pretty chintzy.As far as functionality, about all I could tell that it did is boost the volume on quieter parts of movies.It does seem to have some issues with HDMI or the hdcp content protection. Sometimes it has to get turned on and off or HDMI cables unplugged and plugged in to get the video to work.Sent from my Moto x4 using Tapatalk
Canadian Tire LED Flashlight - Page 1
Forum section: electronics / general

author: Dwaine
author_rank: Frequent Contributor
timestamp: May 27, 2018, 07:53:58 pm
content: Bought a Canadian Tire LED flashlight for my next camping trip. Opening up the package, the first thing I noticed was the power supply to charge the flashlight. It a dual AC/DC charger. So I thought, let's measure the exposed DC plug ends when plugged in on the AC outlet.Yep... 6volts DC live. At least it's not 120volts AC shooting out. I expected better.

author: Nominal Animal
author_rank: Super Contributor
timestamp: May 28, 2018, 12:47:57 am
content: If I was a baby, I'd say the wall wart looks very much like having a shiny nipple... perfect size for grabbing, too.

author: Dwaine
author_rank: Frequent Contributor
timestamp: May 28, 2018, 03:35:39 pm
content: That’s how you naturally grab the plug. The charger is actually Intertek tested. I guess it’s perfectly fine to have it hot with 6 volts.
US$2050 10ft Cat-8 ethernet cable and more! - Page 1
Forum section: electronics / general

author: JohnnyMalaria
author_rank: Super Contributor
timestamp: May 14, 2018, 09:41:31 pm
content: This websiteis very entertaining. There're BS cables for every conceivable application.Have fun!

author: The Soulman
author_rank: Super Contributor
timestamp: May 14, 2018, 10:44:14 pm
content: Their optical cables aren't shielded, amateurs.. lol

author: Brumby
author_rank: Unknown
timestamp: May 15, 2018, 02:54:13 am
content: (Stop giving away all the good ideas!!)
Really.....BECOME INVULNERABLE TO ELECTRICITY ? - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: April 26, 2018, 03:59:15 am
content: Lets try a 1 amp @ 1 megavolt discharge...Though, this could be an ultimate ESD grounding of a human.

author: Cyberdragon
author_rank: Super Contributor
timestamp: April 26, 2018, 04:23:53 pm
content: ok then...now go stand out in a field in a thunderstorm...

author: helius
author_rank: Super Contributor
timestamp: April 26, 2018, 05:23:59 pm
content: The Faraday Cage principle has been known for almost 200 years. Although they incorrectly wrapped the head part behind the ears, which is why he complains at 1:35.

author: BrianHG
author_rank: Super Contributor
timestamp: April 27, 2018, 12:30:07 am
content: Quote from: Cyberdragon on April 26, 2018, 04:23:53 pmYOU Bet. He should go out in the middle of a golf field during a thunderstorm and hold up an iron golf club. Let's test that invulnerability!

author: rrinker
author_rank: Super Contributor
timestamp: April 27, 2018, 02:27:47 pm
content: Quote from: BrianHG on April 27, 2018, 12:30:07 amOnly if he's having the best game of his life!

author: Seph.b
author_rank: Regular Contributor
timestamp: May 09, 2018, 10:10:45 pm
content: I really enjoy Kreosan. In their earlier videos bombs can be heard exploding in the background. It must really change your risk vs. reward formula when you know you can be blown to bits at any time. Then they probably started making that sweet YouTube money and had to keep up the stupid antics.My favorite was their 'EL' wire lighting on there shed. They just plugged a steel cable into the main line coming into the breaker box.A video showing some of the aftermath of the conflict happening around them.

author: SL4P
author_rank: Super Contributor
timestamp: May 10, 2018, 07:33:51 am
content: Why do people do this to each other?Simple question

author: Electro Detective
author_rank: Super Contributor
timestamp: May 10, 2018, 08:36:56 am
content: Wouldn't it be a lot easier and cheaper...to just not pay the power bill ?"INVULNERABLE TO ELECTRICITY" guaranteed
find a better lightning cable. i dare you. - Page 1
Forum section: electronics / general

author: electrolust
author_rank: Unknown
timestamp: April 10, 2018, 09:11:01 am
content: https://www.getmodern.co/pages/mcb?gclid=EAIaIQobChMI492UsvWr2gIVY8fjBx1nbABjEAEYASAAEgJ8bPD_BwESure, there's some minor defects with the page.- Engrish- no actual product shots (all renders)- calls it Lightning Bolt, when the name is just Lightning- logos of tech sites that have not published articles on the product or mentioned it at all- an offer timer that counts to zero and then does nothing else- one of the product shots shows a different form factor- irrelevant circuit board shot- MFi mis-capitalized. chances of actual certification: 0%It appears to actually do something, judging by the amazon reviews. But it's more of a misfeature than something useful.Just love the name.

author: ebastler
author_rank: Super Contributor
timestamp: April 10, 2018, 07:36:58 pm
content: Quote from: electrolust on April 10, 2018, 09:11:01 amRight. What could possibly go wrong with a product made by "McDODO"?

author: Electro Detective
author_rank: Super Contributor
timestamp: April 13, 2018, 09:13:40 am
content: "Braided Nylon Cable & Stylish Zinc Connector"is the backup wood duck drawcard to get the paypal juices flowing,in case all the tech BS flies over their headsat spotted UFO velocity

author: Sudo_apt-get_install_yum
author_rank: Regular Contributor
timestamp: April 13, 2018, 10:53:12 am
content: I love their catch phrase "We Are Saving Phones! One Charge at a Time!"They also say that there is a 100% money back guarantee so I might order one using PayPal (since it has money back) and see what you getThe cable would probably be filled with "Snake Oil" for extra low resistance

author: JolyGoodDay
author_rank: Newbie
timestamp: April 13, 2018, 03:12:48 pm
content: LOL that tab

author: martinator
author_rank: Contributor
timestamp: April 13, 2018, 04:15:15 pm
content: I've just pounced on their $64.99 five cable offer, too good to resist. I'm desperate to get a working one and by buying five in one go I'm covered if the other four turn out to be duds. Beware of fake McDoo-doo cables, they're really shit.

author: Cyberdragon
author_rank: Super Contributor
timestamp: April 13, 2018, 06:17:44 pm
content: First of all, we all know all lithium batteries have protection, as they are extremely electrically fragile and will burn up otherwise.There's probably not even a protection circuit inside, just the charging coms circuit. You can get higher current through cable negotiation (either digital or analog through resistor bridges), but only if the device and power source support it.

author: David Chamberlain
author_rank: Frequent Contributor
timestamp: April 28, 2018, 10:35:20 am
content: DODO
Who can you trust? - the Dodgy Brothers! - Page 1
Forum section: electronics / general

author: Brumby
author_rank: Unknown
timestamp: February 14, 2018, 06:50:29 am
content: Circa 1990, Australia was treated to a TV show called "Fast Forward". It contained quite a variety of "send up" material - but one pair of characters would be right at home in this thread...I would like to nominate them as honorary patrons of this board.

author: Electro Detective
author_rank: Super Contributor
timestamp: April 13, 2018, 09:19:36 am
content: If you can't afford Audiophool products, Dodgy Brothers have THE deal for you

author: EEVblog
author_rank: Unknown
timestamp: April 13, 2018, 09:21:36 am
content: We will not be beaten on 2 1/2 inch hose bits!
Cheap 300W cc/cv buck converter suddenly quadruples current draw as cc limit is  - Page 1
Forum section: electronics / general

author: Julian Bowen
author_rank: Newbie
timestamp: April 08, 2018, 09:47:26 pm
content: Hi all,I'm trying understand what is happening with a newly acquired cheap chinese 300W buck converter, which has cc and cv adjustment.I am powering it from a 20A 12v atx power supply, and the voltage can be adjusted from 1.3v upto 11.2v in a linear fashion, and voltage appears stable under load. The odd behaviour starts when I start to reduce the cc pot, all starts ok as the current limit is reduced and the output voltage starts to reduce, then the inductor starts to resonate, the current draw from the power supply almost quadruples and the atx power supply shuts down.I've logged a few efficiencies, over a variety of voltages and different loads (11w to 90w) and the numbers are similar each time. The effieciency is in the region of 90%, with a 2-3 watt difference between input and output then a slight decrease in the current limit and the output remains unchanged and the input increases dramatically. One logged change went from 2w difference to a 48w difference. Can anyone explain this?
IQ² power meter for bicycles - Page 1
Forum section: electronics / general

author: Gilatabar
author_rank: Newbie
timestamp: April 02, 2018, 05:44:00 pm
content: Hi all!Long time follower of the Youtube channel, but first time on here.I came across something today about bicycle power meters and it made me wonder if that thing would actually work (I'm thinking not). Let's ignore the additional length it gives to the pedal axles. :Most power meters are either in the wheels, measuring the tortional force between the chain and the rims/tires, or are in the cranksets, measuring the strain on the spider holding the chainrings. Garmin and other brands are also making some in pedal forms, and I'm guessing they're measuring the deflection of the pedal axle. But this "new, revolutionary design" seems off. Would their strain gage actually measure anything?Thanks!

author: BrianHG
author_rank: Super Contributor
timestamp: April 02, 2018, 07:50:12 pm
content: The units inbetween the pedals and crank are load cells, or strain gauges and are very accurate if done right, that is if your call 1.5% error accurate for the usually 1k$ professional pedals. Also, better check if the units are temperature compensated. Strain gauges drift with temperature and the better pedals have compensation and specify their opperating temperature range. This device, though not too clearly shown in the ad, is a strain gauge inbetween the pedal and the crank. They also look so flimsy and weak needing to fit and be small inbetween your existing pedal and crank, that, if you pedal at low RPM and high torque, (My typically cadence is 17-35, but in highest gear going uphill indefinitely), these devices look like they will peak their readings and snap like I have broken many normal pedals and their bearings in the past. If you pedal at the standard cadence range of >80, then they should be fine as this will be a more normal torque.1. Before buying, search for it's sample speed and torque measuring error compared to other dedicated power meters like power-tap pedals which can measure and log torque both on the down stroke and up stroke on each pedal. Check for error margins and which regulatory firm has validated these devices. Example:http://road.cc/content/review/171512-powertap-p1-pedalshttp://road.cc/content/review/232788-favero-assioma-duo-power-meter-pedalshttp://road.cc/content/review/235867-garmin-vector-3-double-sided-power-meterYou should also be asking not only their % accuracy over the life time of the pedals and unit to unit, get the sample rate as 100 is considered a minimum today. The high end units sample 256 times a second as they need to capture the snap torque every time you shift your weight. If none of this information is made available, then you know something hasn't been done to any quality control standards.Prices have dropped significantly since the add links I posted above. Also, search on ebay for used meters if you want a better price.The PowerTap P1 is a good cross between price and quality.
This JCG King-Kong router's magic smoke is already let out - Page 1
Forum section: electronics / general

author: vanarebane
author_rank: Contributor
timestamp: March 21, 2018, 10:12:40 am
content: For some odd reason, the marketing geniuses (or the genius designer Lyle Yang) decided to render a picture with a smoking router...Also the router name is King-Kong, so maybe it's a smoking monkey?Seen here:http://www.yankodesign.com/2018/03/20/this-router-looks-like-its-invading-earth/

author: Crazy_Engineer
author_rank: Contributor
timestamp: March 24, 2018, 04:30:13 pm
content: Seems like typical marketing wank. They wanted it to look cool and futuristic. Perhaps they wanted to create the perception that it is smoking fast. Regardless, when most people see the series of pictures they just get the idea of a high end router. When an electronics person sees the picture they think

author: Halcyon
author_rank: Unknown
timestamp: March 25, 2018, 07:54:26 am
content: If it's running that "smoking hot", they'd better re-visit the heat sink and thermal design. It's obviously pretty crappy.

author: amyk
author_rank: Super Contributor
timestamp: March 25, 2018, 05:32:59 pm
content: A lot of other stuff on that site istoo... I remember this:https://www.yankodesign.com/2011/06/13/top-25-entries-of-electrolux-design-lab-2011/comment-page-1/
what can I say. qte:electrified wire coils and recording any emitted sounds - Page 1
Forum section: electronics / general

author: GreggD
author_rank: Regular Contributor
timestamp: May 27, 2018, 05:52:39 pm
content: California medical board is threatening to revoke the license of Dr. William Edwin Gray III for selling homeopathic sound files"vials of homeopathic remedies (like water) in electrified wire coils and recording any emitted sounds"https://arstechnica.com/science/2018/05/doctor-slammed-by-med-board-for-selling-5-homeopathic-sound-waves-for-ebola

author: BrianHG
author_rank: Super Contributor
timestamp: May 27, 2018, 07:21:54 pm
content: Quote from: GreggD on May 27, 2018, 05:52:39 pmThreatening?For EBOLA?That should be direct instant revocation.He will be directly, deliberately, knowingly responsible for multiple deaths if he makes 1 single sale to 1 wrong individual.

author: Gyro
author_rank: Super Contributor
timestamp: May 27, 2018, 07:51:09 pm
content: I never thought I'd see anything more dangerous than those cowboys who got locked up for selling those ADE-651 fake explosives detectors - It just goes to show, there's always someone willing to plumb deeper depths!

author: Nominal Animal
author_rank: Super Contributor
timestamp: May 28, 2018, 12:50:32 am
content: Doesn't "the law of infinitesimals" mean that repeating those sounds (by blowing a raspberry, say) would be even more potent?

author: dmills
author_rank: Super Contributor
timestamp: May 28, 2018, 01:17:02 pm
content: This guy is an amateur when it comes to dangerous quackery.Andrew Wakefield knew how to do it right (He of the whole MMR scaremongering thing, done for profit).That mans quackery is KNOWN to have killed kids.Regards, Dan.
Solar panels that make electricity from rain - Page 1
Forum section: electronics / general

author: IanMacdonald
author_rank: Frequent Contributor
timestamp: March 14, 2018, 08:09:44 pm
content: https://www.theguardian.com/environment/2018/mar/13/rain-or-shine-new-solar-cell-captures-energy-from-raindropshttps://pubs.acs.org/stoken/presspac/presspac/full/10.1021/acsnano.8b00416The current delivered by a raindrop is apparently 33nA.I've always wondered why, in Scotland, they don't fit buckets to the tips of wind turbine blades. At least then they would generate power for most of the time.

author: jmelson
author_rank: Super Contributor
timestamp: March 14, 2018, 08:41:35 pm
content: Quote from: IanMacdonald on March 14, 2018, 08:09:44 pmIt seems like that should be measured in Coulombs, not Amps.Jon

author: BrianHG
author_rank: Super Contributor
timestamp: March 14, 2018, 11:55:44 pm
content: Since most panels are angled and have some elevation off the ground, what's wrong with placing gutters below all the solar cells, collecting the water flow with some simple plumbing and run a small hydro turbine?

author: JohnMc
author_rank: Contributor
timestamp: March 15, 2018, 12:31:56 am
content: Quote from: BrianHG on March 14, 2018, 11:55:44 pmTwo things are wrong with that.- It would work therefor negating the need to research it to death.- Well not imposable it is much harder to run a successful* kickstarter on something that you can build yourself with a trip to the DIY store and a order from your preferred purveyor of chinesium like eBay, aliexpress or banggood.*Successful=Lots of money for fast cars and fast women.

author: IanMacdonald
author_rank: Frequent Contributor
timestamp: March 15, 2018, 07:00:02 am
content: Quote from: jmelson on March 14, 2018, 08:41:35 pmNo, it states that this is the current delivered. Coulombs would be charge delivered. Of course neither give any clue as to the actual power output. Which is probably miniscule.

author: Delta
author_rank: Super Contributor
timestamp: March 15, 2018, 07:11:34 am
content: Shurely* we should be talking about Joules (or other units of energy) per raindrop?* cf Private Eye magazine.

author: BradC
author_rank: Super Contributor
timestamp: March 15, 2018, 08:02:48 am
content: Quote from: Delta on March 15, 2018, 07:11:34 amWe probably should, and don't call me Shirley.
Paranormal detector - Page 1
Forum section: electronics / general

author: jhenderson0107
author_rank: Regular Contributor
timestamp: March 19, 2018, 12:21:34 am
content: Fortunately, I currently have no need of this device (https://www.ebay.com/itm/Rem-Pod-EMT-Programmable-Field-Temperature-Spirit-Ghost-Detection-Paranormal-New/112437050620?hash=item1a2dc53cfc:g:J7AAAOSwAO9ZOsZi). But it's nice to know that should that should the need arise, it can respond within 100 mS!

author: BrianHG
author_rank: Super Contributor
timestamp: March 19, 2018, 01:13:13 am
content: QuoteWith an EM radiating antenna, does this device meet FCC approvals?Also, what on earth does EM have to do with spirits? Wouldn't a spirit radiating antenna be better suited?

author: jhenderson0107
author_rank: Regular Contributor
timestamp: March 19, 2018, 02:56:20 am
content: Brian -The spiritual plane can be disrupted by an EM pulse - this is common knowledgeJim

author: Cyberdragon
author_rank: Super Contributor
timestamp: March 19, 2018, 06:54:37 am
content: The common belief is that spirits emit and are affected by EM fields.Have you not seen Ghostbusters?

author: daqq
author_rank: Super Contributor
timestamp: March 19, 2018, 07:03:31 am
content: How does one calibrate this? Are there standard haunted items? Say, a doll that has one millihaunt?

author: rrinker
author_rank: Super Contributor
timestamp: March 20, 2018, 07:35:22 pm
content: Oh that's way too expensive. Big Clive, I'm pretty sure it was him, showed how to build one a few years back on one of his videos. Pretty simple, a couple of trannys, an LED, some caps, resistors, and some wire. Worked, too, detected EM radiationCost maybe a buck to make, if you had no junk box of components. Hmm, if I can sell for that kind of price...

author: Cyberdragon
author_rank: Super Contributor
timestamp: March 20, 2018, 07:38:25 pm
content: Yeah, there's nothing much inside it, just an 8-bit micro and some sensors. The price is pure wankery. Unless they actually did over-engineer it with expensive parts just to make it seem "professional".
Is this on purpose? EEVBlog Forum messed up... - Page 1
Forum section: electronics / general

author: ivaylo
author_rank: Frequent Contributor
timestamp: March 17, 2018, 06:56:11 am
content: See attachment. There is some sort of Javascript injected in the forum opening a popup on random pages sending you to Amazon or something. Can’t believe this is on purpose, forum is almost unusable. I am seeing this on iPad/Safari...

author: BravoV
author_rank: Super Contributor
timestamp: March 17, 2018, 07:18:09 am
content: Nope, just tested few minutes ago, never happened on my Android phone & tablet browsers, old ipad Safari, desktop Chrome and Firefox.

author: ataradov
author_rank: Super Contributor
timestamp: March 17, 2018, 07:19:52 am
content: It probably depends on ad serving sever and what it thinks is "relevant" to you. I just tried to browse for a while, and never got this.

author: Marco
author_rank: Super Contributor
timestamp: March 17, 2018, 07:28:20 am
content: Probably some advertiser found a way to sneak a popup through google adds for a while before getting hit with the ban hammer.

author: ivaylo
author_rank: Frequent Contributor
timestamp: March 17, 2018, 07:35:10 am
content: Thanks for checking, guys... It started yesterday. It doesn’t send you to Amazon when you click close, but an Amazon styled site (attachment). Can’t go back either. I am fine ignoring flashy ads, this one takes over the session. Super annoying...

author: frozenfrogz
author_rank: Frequent Contributor
timestamp: March 17, 2018, 08:16:23 am
content: Is it only on the EEVblog, or are you getting similar events on other sites too?As a work around, you can deny certain urls for safe measure in iOS.Settings -> General -> Restrictions -> Websites -> Never allow... Add a website --- should do the trick.You should be able to block all .top top level domain urls - that might result in some issues though, for example visitingwww.tophats.com, if the filter is just checking for strings in the url. I do not know how the filter actually works in iOS and I have no device to test it myself.

author: Stray Electron
author_rank: Super Contributor
timestamp: March 17, 2018, 11:08:23 pm
content: I found that Windows seems to be incapable of blocking certain URLs through the Settings. Particularly those associated with various "Home Shopping Assistants" aka browser hijackers. I now filter all of my non-desirable sites via the Windows "hosts" file and it stops them dead in their tracks.

author: retiredcaps
author_rank: Super Contributor
timestamp: March 18, 2018, 01:18:53 am
content: Quote from: ivaylo on March 17, 2018, 07:35:10 amA quick search says some "malicious ad" got into google's ad network. Recommended action is to clear your browser data, cookies, site data, etchttps://discussions.apple.com/thread/8255372https://www.rollcall.com/news/politics/no-you-didnt-win-a-1000-amazon-gift-card-heres-why-you-saw-a-weird-pop-up-ad-on-rollcall-com
US Psychotronics Association - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: February 19, 2018, 12:37:18 pm
content: Somehow I got onto the newsletter feed of this group of A-grade nutjobs. 100 pages of hilarity...https://drive.google.com/file/d/1NHyKAG0NLfYscEYxuBg3hExNEtl8GkoE/view

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: February 19, 2018, 11:06:51 pm
content: Oh my, you got the real thing there!'Soviet accumulators of healing energies'? Hah, is THAT the stuff with wich they made the old geezers like Brezhnev walk around if still alive?'Quantum Agriculture in India 2018'? Normally called a severe famine!How can this energetic and knowlegdeable body of evolved beings have failed to solve the problems of our planet? Blame it on the Reptiloids again? And I say the Crocs are innocent this time!

author: helius
author_rank: Super Contributor
timestamp: February 19, 2018, 11:24:46 pm
content: Quote from: Neomys Sapiens on February 19, 2018, 11:06:51 pmftfy

author: Buriedcode
author_rank: Super Contributor
timestamp: February 20, 2018, 01:13:27 am
content: Jackpot!Although I'm quite cynical, I am still amazed that not only stuff like this is still about, but just how much of a following it has to warrant seminars and meetings. We tend to think of weird archaic ideas has being superseded by modern theories that are proved to be correct (beyond a reasonable doubt) by modern life (cars, phones, computers all rely on mechanisms and natural laws that discount these woo ones) but seriously.. I think its actually growing.It's even being merged with all the wellness health woo that tries to include "diet and exercise" so it is seen as legitimate, but delve deeper and it's still based on some bizarre 19th century idea of vitalism, "energy" or coffee enema's.

author: Cyberdragon
author_rank: Super Contributor
timestamp: February 20, 2018, 02:09:36 am
content: Quote from: Buriedcode on February 20, 2018, 01:13:27 amUnfortunately, a lot of the diet and excercise stuff people believe in today is actually ancient BS.Watch the show "Adam Ruins Everything"
Zero point energy device patent? - Page 1
Forum section: electronics / general

author: kalel
author_rank: Frequent Contributor
timestamp: July 27, 2017, 03:40:33 pm
content: While searching for conversion of electromagnetic energy into electric energy, I've ran into this patent:https://www.google.com/patents/US5590031'A system is disclosed for converting high frequency zero point electromagnetic radiation energy to electrical energy.'Now, there's a lot of stuff in the Patent that I don't understand, but what are your thoughts?Searching for zero point energy leads me here:https://en.wikipedia.org/wiki/Zero-point_energyAnd it seems to be something from quantum physics.So, is that patent something like one of those free energy videos, or a genuine scientific attempt to extract something that does/might exist?Quote from wiki:"Physics currently lacks a full theoretical model for understanding zero-point energy"So I assume this is not one of those fields that were researched for thousands of years.Edit: Related articles: "Quantum vacuum", I have heard this mentioned with some free energy stuff.But, if we go into the description of it:QuoteLowest possible energy doesn't sound like a good source of energy, could it be? I'm ignorant to quantum physics.

author: colorado.rob
author_rank: Frequent Contributor
timestamp: July 27, 2017, 05:37:30 pm
content: It appears to be an RF antenna. Which, by the way, is exactly what you appear to be searching for (depending on which end of the electromagenetic spectrum you are interested in).
Dave, Bateroo is a joke, check MAGRAV technology!! LOL - Page 1
Forum section: electronics / general

author: TJ232
author_rank: Frequent Contributor
timestamp: August 29, 2017, 11:33:53 am
content: Hi Dave,Please don't waste anymore time with that poor Bateroo thing, Solar Roadways and other obsolete techonology.Did you not heard yet about the new holy grail of free energy, MAGRAV technology? If not, you should check aboutCheers,TJ.

author: Jeroen3
author_rank: Super Contributor
timestamp: August 29, 2017, 11:47:39 am
content: QuoteReady in 2027.

author: cdev
author_rank: Super Contributor
timestamp: August 29, 2017, 02:08:08 pm
content: Do you mean "hot air" ?
How much does free energy cost? $5000.00 - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: September 06, 2017, 04:16:42 am
content: This guy popped up on my youtube. He sucks at bull shitting and sells these things for $5000. He also has a $1000 USB charger that has no plug for recharging. If this worked wouldn't NASA use it and put the fossil fuel companies out of business? Best is read the comments where people are defending his nonsense.https://youtu.be/6NjeJVyZp_kI hate con men. Lowest of the low of criminals and thieves.

author: boffin
author_rank: Unknown
timestamp: September 06, 2017, 04:35:33 am
content: At that kind of price it had better provide inverse reactive current, for use in unilateral phase detractors, and capable of automatically synchronizing cardinal grammeters

author: EEVblog
author_rank: Unknown
timestamp: September 06, 2017, 04:50:46 am
content: Quote from: boffin on September 06, 2017, 04:35:33 amI've only seen that on the $10k units.

author: Brumby
author_rank: Unknown
timestamp: September 06, 2017, 05:00:30 am
content: I didn't even know they had units that cheap!For those wondering (and for those who would like to see it again) here's where these features were presented:

author: raptor1956
author_rank: Frequent Contributor
timestamp: September 06, 2017, 05:25:36 am
content: Quote from: EEVblog on September 06, 2017, 04:50:46 amTo be fair ... there are several Chinese sources at less than half that price -- check the latest models by Drok!Brian

author: jh15
author_rank: Frequent Contributor
timestamp: September 06, 2017, 06:03:06 am
content: He has a lab coat.Not sure how long it is, but mine has an esd Faraday cage.

author: MarkS
author_rank: Unknown
timestamp: September 06, 2017, 08:49:17 am
content: Quote from: Brumby on September 06, 2017, 05:00:30 amOne take, totally ad-libbed!

author: hermit
author_rank: Frequent Contributor
timestamp: September 06, 2017, 01:17:17 pm
content: Magnets not included.

author: Kjelt
author_rank: Super Contributor
timestamp: September 06, 2017, 03:02:35 pm
content: Old news, they had these powersources decades ago

author: lapm
author_rank: Frequent Contributor
timestamp: September 07, 2017, 06:52:41 am
content: Nasa would buy it screaming on its way to store... Especially since they try to make that impossible drive working...So no, i dont believe a moment that this device works as advertised...

author: kalel
author_rank: Frequent Contributor
timestamp: September 07, 2017, 07:00:29 am
content: Quote from: lapm on September 07, 2017, 06:52:41 amWhich device? I guess a few things were discussed here.

author: HighVoltage
author_rank: Super Contributor
timestamp: September 07, 2017, 07:11:29 am
content: He invested in Maxwell Supercaps, so it must be good, ... and working !

author: MarkS
author_rank: Unknown
timestamp: September 07, 2017, 09:24:52 am
content: Quote from: lapm on September 07, 2017, 06:52:41 amIt *is* working! Ignore the fact that it can only lift a postage stamp size piece of tissue paper in a gravity-free environment...
Motherboard marketing BS (audiophool warning + extras) - Page 1
Forum section: electronics / general

author: ivan747
author_rank: Super Contributor
timestamp: August 01, 2015, 05:05:02 pm
content: QuoteIgnoring the audiophiles, how can the leakage current (a DC characteristic) affect the noise level (an inherently AC phenomenon)?Bullshit aside, I'd like to know how good quality capacitors can really affect the sound output of any audio device.Of course, this electrolytic capacitors are used to block DC from the DAC/amplifier inside the product in question. In other words, these capacitors and the headphones connected to them (or line-in circuits) form a high pass filter. The single most sound-affecting characteristic of this circuit is the high pass filter stop band, the point where it starts to attenuate low frequencies significantly. I assume you could even ruin a product if you were on a budget and designed your product to use high quality caps, but the budget forced you to use a capacitance too low for the ideal stop frequency (<20Hz).How can audio quality actually be improved on similar products?What do you think about these motherboard gimmicks? Even low end motherboards now feature these sort of gimicky electronics marketing. I also saw low ESR MOSFETs being featured for their high ESD immunity. These were probably used as pass elements for the RAM DC-DC converter. It was very carefully worded to make it seem like this ESD protection somehow protected the RAM:QuoteQuoteFirst they talk about how the MOSFETS "control the power supply" and then go to talk of how they offer "up to 7.5 times the ESD protection levels". The "them" that is in bold is the only word that saves them.Basically they are marketing how good the RAM DC-DC converter MOSFETs are at protecting themselves... not the RAM, not the processor... LOOK THEY EVEN HAVE A GRAPH

author: German_EE
author_rank: Super Contributor
timestamp: August 01, 2015, 05:30:16 pm
content: No, I'm not an audiophile as I don't have the hearing now to justify it, but I can see how different capacitors can affect a circuit.1) Capacitor leakage current is a factor in DAC and particularly ADC circuits. If a capacitor starts to leak then it might provide a DC offset on the ADC input, especially if the ADC input stage has a high impedance.2) Different capacitors have a different frequency response, especially at the low and high ends of the audio spectrum. Note that I'm not saying that some are better, just different.3) Poor quality ceramic capacitors are piezoelectric and the amount of capacitance that they provide can vary depending on the applied voltage. Good quality film capacitors do not show these characteristics.4) Good quality capacitors have a low ESR.
Can we also have a "what if(I havn't got a clue)" forum please :) - Page 1
Forum section: electronics / general

author: fourtytwo42
author_rank: Super Contributor
timestamp: March 03, 2018, 09:34:23 am
content: Seems to me the renewables forum becomes a general dumping ground for "what if" or dodgy technology!Perhaps the mods could move some of the more extreme examples
You thought solar roadways were BS? You havent seen this guys "invention" - Page 1
Forum section: electronics / general

author: raspberrypi
author_rank: Frequent Contributor
timestamp: March 25, 2017, 01:13:15 am
content: Listen to the bullshit coming out of his mouth. He just takes a whole bunch of technical terms and then mixes them with excuses when you try to make sense of it.This guy pisses me off because not only is it spreading "psudoscience" hes trying to sell this junk for 5000$ along with a whole bunch of other free energy battery chargers.Feel free to leave him a negative comment and hopefully saving some fool from getting scammed.https://youtu.be/30h6hrxACdA

author: EEVblog
author_rank: Unknown
timestamp: March 25, 2017, 03:00:08 am
content: Err, so it's a battery, some supercaps, and a motor.Lasts for a few days and simply assumes it will last for years, got it

author: Red Squirrel
author_rank: Super Contributor
timestamp: March 25, 2017, 04:03:19 am
content: Watch batteries last pretty long too.These pulse motors are neat as a show piece but far from solving any world energy problems.I'll be impressed if someone manages to power a 100w load for a few months with a simple quick hand crank to get it going. Not going to happen.Now if you hooked up a couple batterisers to it...

author: raspberrypi
author_rank: Frequent Contributor
timestamp: March 25, 2017, 04:42:32 am
content: Quote from: Red Squirrel on March 25, 2017, 04:03:19 amI dont even think its that. Its just some spinning motors. From the way the guy talks I don't even think he could build a simple one transistor circuit, or even explain what a diode does. He stumbles around for words when hes trying to bullshit, I wouldn't even put him at average intelligence. His scam is poorly thought out based on what his website says, and his comments don't even do a good job at bullshitting. Not even worth the time to debunk as he won't even sell you a working product because he uses the "You built it wrong" excuse.

author: jonovid
author_rank: Super Contributor
timestamp: March 25, 2017, 05:20:16 am
content: ow Look its the electronics magician & technology entertainers at it again.he will make an electron jump through a hoop.need more magic tricksorhttp://www.kingmagic.com/index.php?main_page=index&cPath=12