hybridfree/eevblog-posts huggingface dataset:
Kinetic and solar pathways coming to Bedfordshire - Page 1
Forum section: electronics / general

author: hooker1uk
author_rank: Newbie
timestamp: January 31, 2019, 06:44:29 pm
content: A bit of an ambitious first post to the EEVBlog forums but it has to be (hi all)My local council sent me an email about high tech roads, and while I'm happy the council are happy to innovate and try things I think they are walking into a mahoosive tub of snake oil.Until today I'd not heard of kinetic pathways - sounds as bad as solar roadways and very little data (in my very limited googling) available for end users or organisations to be able to see true cost per install or real life returns on investments.The solar cyclepath is pure snakeoil unless it's similar to others with the panels above the path - I'm sure it's just money fapped up the wall (they love doing this)What are your thoughts on thisThanksQuote

author: Marco
author_rank: Super Contributor
timestamp: January 31, 2019, 06:56:13 pm
content: The only part of that which isn't obviously insane is the geothermal heated roads ... it might still be insane, but at least it would require more investigation than just using common sense.Write to your local council, MP and local newspaper that forthe same amount of moneyspend on solar roadway they could fund 30x more solar-park kWh/year (not that that makes much sense either). Probably 10x more rooftop solar too, but would have to crunch some numbers.

author: Domagoj T
author_rank: Frequent Contributor
timestamp: January 31, 2019, 08:38:24 pm
content: How long before people realize that walking on kinetic paths that capture the energy of them walking is surprisingly tiring, since guess where the energy comes from?

author: David Hess
author_rank: Super Contributor
timestamp: January 31, 2019, 09:59:13 pm
content: Quote from: Domagoj T on January 31, 2019, 08:38:24 pmBut it will keep them fitter lower health care costs ... unless it encourages them to take a vehicle when they otherwise would have preferred walking.

author: hooker1uk
author_rank: Newbie
timestamp: February 01, 2019, 08:44:51 pm
content: HiI'm in the process of requesting this information from them at the moment no doubt CBC PR team are worried as there (as of 10 mins ago) no news on the councils websitehere's hoping it'll bring some good info
150V from a plant! - Page 1
Forum section: electronics / general

author: paullo
author_rank: Newbie
timestamp: December 18, 2018, 09:17:29 am
content: It's dark, we light the plants. Just connect an electrical outlet to the base of the drum to turn on ten LED bulbs: the equivalent of 150 volts."We proceeded by trial, beating on the leaves of oleander in search of the best material and frequency"- Somebody needs to call the RSPCPhttps://www.repubblica.it/scienze/2018/12/12/news/le_piante_che_emettono_luce_create_dall_iit-214102850/

author: Zucca
author_rank: Unknown
timestamp: December 18, 2018, 01:26:28 pm
content: You guys don't understand what can happen in Italy...

author: SiliconWizard
author_rank: Super Contributor
timestamp: December 18, 2018, 07:11:16 pm
content: Oh ok. This is why we call them power plants.

author: PlainName
author_rank: Super Contributor
timestamp: December 19, 2018, 08:14:47 am
content: QuoteEither those are humongous LEDs or they're an order of magnitude out. I suspect someone has missed a . from in front of the 0.

author: grifftech
author_rank: Frequent Contributor
timestamp: January 14, 2019, 03:33:30 pm
content: I could probably get 1000 volts from potatoes

author: Gregg
author_rank: Super Contributor
timestamp: January 14, 2019, 05:49:27 pm
content: California used to love oleanders as barriers along freeways, there are less of them because of droughts lately. But about 20 years ago I saw a vehicle crash through about a hundred meter long path of oleanders at dusk; funny I didn’t see any sparks.

author: ebastler
author_rank: Super Contributor
timestamp: January 14, 2019, 08:06:55 pm
content: Quote from: dunkemhigh on December 19, 2018, 08:14:47 amThey don't claim it's 150V, but "theequivalentof 150V". Whatever that is...

author: rrinker
author_rank: Super Contributor
timestamp: January 14, 2019, 08:19:43 pm
content: .15 volts actual and then making some impossible assumption that it could supply 1000x more current into the same load, if it really wanted to (some people say singing to plants makes them grow - maybe the appropriate type of music makes them supply more power). Or supply the same current into a 1000x lower impedance load.
2N3904s that are CBE! - Page 1
Forum section: electronics / general

author: bjrolfe
author_rank: Newbie
timestamp: December 21, 2018, 03:49:37 pm
content: So, it seems I have a baggie of 2N3904s that are CBE (should be EBC). I used one in an Arduino setup to interface with my alarm system and couldn't figure out why the data line was being partially pulled down to ground (when it shouldn't). Spun it 180° and started working. Dropped in a 2N4400 and was working correctly (EBC).Attached some breadboard pics.Notes: 12V power supply, 1KΩ resistor.Has anyone else seen this madness?I've now labelled that baggie as "CBE!!!"Edit:Added a pic with the multimeter to show where the extra wires are going to.

author: wraper
author_rank: Unknown
timestamp: December 21, 2018, 04:07:50 pm
content: Where did you get them from?

author: bjrolfe
author_rank: Newbie
timestamp: December 21, 2018, 04:19:20 pm
content: I bought them from a local electronics store more than 10 years ago.

author: RoGeorge
author_rank: Super Contributor
timestamp: December 21, 2018, 04:20:38 pm
content: Why is the base of the transistor floating (not connected in any circuit) on the breadboard?If the red/black wires near the transistor are coming from Arduino (GND and Data line), then your LED is powered by the Arduino data line, and not by the transistor.

author: bjrolfe
author_rank: Newbie
timestamp: December 21, 2018, 04:32:45 pm
content: Base is not connected to show that it's conducting without any current through the base. The other wires are just off to my multimeter to check the voltage drop over the transistor (see 4th pic).It's conducting because it's over the ~6V EB breakdown voltage.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: December 21, 2018, 06:02:41 pm
content: There's P2N2222A which is a PN2222A (note: not 2N2222(A), that's TO-18!) with reverse pinout. I wonder if it was a relabel of that, or a "P2N3904" as the case may be?Tim

author: bjrolfe
author_rank: Newbie
timestamp: December 21, 2018, 07:09:26 pm
content: Yes, the labeling does look pretty crappy so might be a relabel of a different part.

author: RoGeorge
author_rank: Super Contributor
timestamp: December 21, 2018, 08:04:22 pm
content: That's weird, those transistors are very common and cheap, so I see no reason why one would take the effort to re-marking (counterfeiting) them, unless someone was trying to literally sell garbage (parts that fail all tests end up in the dumpster bin of the factory. Depending on the wealth of the dumpster diver, some might try to sell out-of-spec parts.Maybe it's a mistake in the datasheet(well, once I found a transistor pinout mistake in a datasheet, but that was in a local paper-printed catalog, way before the PDF datasheet era)My best guess is that you bought some other parts that were labeled by mistake as 2N3904 by the factory, so that particular batch was discarded, and the dumpster-diver somehow managed to sell them as 2N3904, even if they are something else.
EMF Detecting with your Phone - Page 1
Forum section: electronics / general

author: 0culus
author_rank: Super Contributor
timestamp: February 19, 2019, 06:52:24 am
content: https://itunes.apple.com/us/app/electromagnetic-detector-emf/id836603095?mt=8While one might make a case that the App Store is better curated than the Play Store...there's still a lot of crap out there. This fine app has one of the worst UXs I've seen AND charges $3 if you want to remove the time limit. They claim they are using the phone's compass to detect magnetic fields.

author: Raj
author_rank: Frequent Contributor
timestamp: February 19, 2019, 06:59:14 am
content: Well, phones do have magnetometer, but I doubt it has high enough sample rate and resolution to be of any use. They are 25 sampels er second I guess to match the screen refresh while being cheap (don't quote me on this)This app looks like a toy... One of the 'Swiss knife' type app was way better, with graph plotter and much more ... Plus it was free (had it not been, it wouldn't have mattered since Google gives you rewards for surveys)
Third party Maglite Tail Switch - Page 1
Forum section: electronics / general

author: @rt
author_rank: Super Contributor
timestamp: December 11, 2018, 07:08:53 am
content: I’m so pissed!https://imgur.com/a/Pit2nZ2Maglite Mini Pro tail cap is on the left, and the aftermarket tail cap that provides a tail switch on the right.Can you see the problem already?The original Maglite has both threads coated so that leaky batteries don’t corrode the tail cap closed.It only makes connection through the very end of the tube.The third party thing I got today can’t possibly work unless the inside of the Maglite thread in the body is worn badly.https://imgur.com/a/ERCXeMmThis is very difficult to do on purpose, so I taped up the switch tail cap assembly and started sanding with paper bent around a steel ruler.While doing that, the Maglite body rolled of the table and dinged up the open end of the body. It’s literally a few days old.I’ll likely get a refund on the switch part, but dinged up a new Maglite Mini Pro in a matter of days before even using it.It will have to be further messed with to get either tail cap to screw in. Don’t buy!Aside from being useless, and poorly designed, it’s an impressively high quality piece of kit (seriously).

author: nsd_c
author_rank: Contributor
timestamp: December 29, 2018, 03:30:52 am
content: I have an older Maglite (non-pro variant--the kind that uses Xenon(?) bulbs) on which the factory cap is more like the one on the right: no anodizing on the threads. I had batteries leak in it and it wasextremelydifficult to remove the cap. So, that aftermarket cap isn't complete crap: it will work with older (or perhaps all non-pro?) mini Maglites.
ILO Decent Work Across Borders Migration Notes-International Labor Organization - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: December 16, 2018, 02:44:32 am
content: This is a complicated issue with no easy answers. Contains a discussion of the wage parity issue, along with lots of references. And yes it is about (changes happening to) engineering and lots of other professions.ILO Decent Work Across Borders Migration Notes. (International Labor Organization)GATS Mode 4: Movement of Natural Persons and Protection of Migrant Workers' Rights.By Pradip Bhatnagar.https://www.ilo.org/wcmsp5/groups/public/---asia/---ro-bangkok/---ilo-manila/documents/publication/wcms_351261.pdf------Also seehttps://www.google.com/search?q="TN/S/W/14" (dispute over whether guest workers should receive wages based on supplying country or consuming country's laws, or no rules at all. (the free market)Most developing countries argue for the low wages because forcing them to pay wages based on the host country they claim defeats their main advantage low wages.My worry is, would people in the more expensive countries spend years of time in study to enter technical professions if they knew in advance the pay might be really low, perhaps lower than say a taxi drivers or supermarket checkout person? (professions not subjected to trade-agreement mandated international rulemaking)Here is another related discussion:https://library.fes.de/pdf-files/iez/global/06955.pdf--------Of course all this global capture is not what most people want. So how is this happening?When we're told anything, which is seldom, we're told by the Davos crowd that its the fault of 'highly mobile global capital's' demands for 'certainty'.
five volt four amp power supply, not. - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: November 27, 2018, 04:17:52 pm
content: I just purchased anNanoPi-NE04 with power supply as it requires rather more than usual. I checked the output voltage under load and of course it dropped to just over three volts at three amps.So I took it apart and found an unusual electronic component, a ballast gravity ballast that is.A nice chunk of sheared off steel they even went to the trouble of plating it, obviously top quality ballast.

author: SiliconWizard
author_rank: Super Contributor
timestamp: November 29, 2018, 06:20:15 pm
content: A gravity ballast... ok.

author: kjr18
author_rank: Regular Contributor
timestamp: November 30, 2018, 06:04:15 am
content: Well, someone thought: The more power supply weights, the more power you can get from it. So I will take a regular 2A supply, stick inside some slab of metal to make it heavier, and here you go: 4A power supply.I still have somewhere a power supply that is kind of too light to be a 12V 4A. Big enclosure but very light.

author: Gyro
author_rank: Super Contributor
timestamp: November 30, 2018, 01:03:01 pm
content: Quote from: G7PSK on November 27, 2018, 04:17:52 pmAt least they maintained its RoHS status - they could have used Lead.

author: SiliconWizard
author_rank: Super Contributor
timestamp: November 30, 2018, 06:40:26 pm
content: That kinda reminds me of the fake cable grommets you can find on some cheap chinese products and that serve only as decorative deception.
24V LED strip from ebay/china - Page 1
Forum section: electronics / general

author: SillyBastard
author_rank: Newbie
timestamp: November 18, 2018, 03:36:50 am
content: So I just got some 24V LED strips I ordered from ebay and much to my disappointment they came exactly as picturedIf anyone hasn't see these, it's just a stip of LEDs (RGB in my case) that you can cut every 3rd LED for a 12V strip. So that's 3 LEDs in series with a small drop resistorAnyway, so I thought I would go 24V to run 1/2 the current and use smaller wires to run to them. But it seems that whomever designed this either didn't understand ohms law, because the 24V strip, rather than having 6 LEDs in series with the same drop resistor, has 3 LEDs in series still, with I assume a bigger drop resistorMeaning I get the run the exact same current, but at 24V now.

author: SeanB
author_rank: Super Contributor
timestamp: November 18, 2018, 10:03:31 am
content: I just used 2 12V strips in series, so got the current down to half, and this was only because I was going cheap, using an old 24V power supply that was lying around unused, and also recycling old LED strips I gutted out from the scrap yard from scrapped display fridges. Did not need anything more.I would just run 2 in series, the light output will be lower, but the led's will be more efficient at lower current, so not half the brightness, probably 40% less, and as a bonus they will last a lot longer and run cooler.
Good article on "The Deliberate Awfulness of Social Media" - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: November 27, 2018, 03:22:33 am
content: This is so true.https://www.newyorker.com/books/under-review/the-deliberate-awfulness-of-social-mediaQuote

author: MrMobodies
author_rank: Super Contributor
timestamp: November 27, 2018, 03:50:01 am
content: What about the social media here about the Audiophools?It could be awful to them as the truth does hurt.Coming from an Electrical Engineers blog and community it's no conspiracy theory to guess what they're made off.
The Project Tesla Solar Powered Smartphone. - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: November 07, 2018, 02:06:22 am
content: You need 30 hours of direct sunlight to charge it's own battery, not counting the iPhone's battery.https://caviar.global/caviar-iphone-x-en/tesla-en-2/Let the flaming commence:If I had to find a direct sun-lit location to leave my phone, everyday, never using the phone except for around every third day, someone will most likely steal it the moment I look away or accidentally forget the phone at it's optimum sunny location.Is this a 4700$ joke?

author: rrinker
author_rank: Super Contributor
timestamp: November 07, 2018, 05:07:11 pm
content: I guess if I went hiking in the desert, with nothing to block the sun, I could strap it to the top of my hat and get 1/3 of a charge in 10 hours of hiking.It's not BS, it will work. Practicality though - that's another whole ballgame.

author: BrianHG
author_rank: Super Contributor
timestamp: November 07, 2018, 11:16:27 pm
content: Quote from: rrinker on November 07, 2018, 05:07:11 pmI think it would melt in the desert's sun's heat.

author: IanMacdonald
author_rank: Frequent Contributor
timestamp: November 08, 2018, 07:54:40 am
content: A perfect companion for the solar powered miner's lamp.

author: Raj
author_rank: Frequent Contributor
timestamp: November 08, 2018, 10:19:28 am
content: Got 8 of those cell array on my roof, can barely produce 5.7v, 1.3A total.
bell & howel TAC VISOR marketing wank - Page 1
Forum section: electronics / general

author: innkeeper
author_rank: Unknown
timestamp: October 17, 2018, 10:09:05 pm
content: anyone see this ad on tv? its up there on the wank scale in my opinion....they use a tv with the polarizer removed to demonstrate how good their glare blocking visor is.like polarized filters are some ground breaking new thing...guess this is supposed to replace sunglasses... so practicalDonald Joseph Bell (1869–1934) and Albert Summers Howell (1879–1951) must be turning in their graves...https://player.vimeo.com/video/287702086https://www.tacvisor.com

author: Ultrapurple
author_rank: Super Contributor
timestamp: October 27, 2018, 05:08:56 pm
content: Judging by all the macho camouflage stuff near the mid-end of the 2 min video (and easily impressed actresses), it's surely a must-have for all branches of armed services. Much cheaper than radar, thermal imaging or any of that other electro-optic malarkey.Another fine product brought to you by EEZEE-FLEECE Industries.

author: Domagoj T
author_rank: Frequent Contributor
timestamp: October 27, 2018, 08:07:26 pm
content: What is this "separate fee" I would have to pay if I wanted the other thing for free?How can a filter, any filter, improve night time image? It can only further decrease the amount of light available to the eyes.Isn't the blank screen gimmick against some law about misleading advertising?

author: innkeeper
author_rank: Unknown
timestamp: October 28, 2018, 07:37:09 pm
content: lol i didn't catch that fee for the free upgrade to the 2 in 1 till you mentioned it.free shipping but the 2 in 1 deal extra fee for the free extra item is 7.95gotta love it...hmm could they be banged for misleading advertising with the blank screen trick. I guess they could argue there demonstrating that it is polarized "blocks glare" but defianly ment to mislead people imholove how they try and make it sound like its a military grade item, including demoing it in a humv and showing a fighter pilot saying this is "inpired by" ther lense technology.think they would use a real picture of a real fighter pilot, nope, its a cgi off the net..https://www.videoblocks.com/video/fighter-pilot-in-flight-military-airplane-war-army-sdxbjq-8iq1761ev.. likely more inspired by that then anything real

author: MarkF
author_rank: Super Contributor
timestamp: October 28, 2018, 09:47:03 pm
content: And don't forget the Battle Visor...

author: GeoffreyF
author_rank: Regular Contributor
timestamp: October 31, 2018, 01:50:33 pm
content: Stick a "TAC" on it and it's cool and makes you bigger all over.Here is the interesting question for anyone who has the equipment to measure it. Does it actually block UV from your eyes properly? I'm thinking that it doesn't.

author: innkeeper
author_rank: Unknown
timestamp: November 03, 2018, 01:21:13 am
content: Quote from: MarkF on October 28, 2018, 09:47:03 pmomg "atomic clarification technology" will the marketing wank ever stop
Skywater Adiabatic distillation - Page 1
Forum section: electronics / general

author: GeoffreyF
author_rank: Regular Contributor
timestamp: October 25, 2018, 10:09:52 pm
content: I can't figure out if this is bogus or not. I'm not satisfied with their explanation. I'd love to know how much energy is involved and where it comes from.http://www.skywater.com/

author: Cyberdragon
author_rank: Super Contributor
timestamp: October 25, 2018, 10:22:08 pm
content: Absulute phony garbage.It takes tremendous energy to condense water, and even then you only get a tiny amount. This type of scam has become as prevalent as free energy. There are plenty of examples out there. Fontus and Waterseer are two I can think of immediately, but there are plenty more and they are all either failures or rediculously impractical.EDIT:https://www.eevblog.com/forum/chat/couple-wins-$1-5min-xprize-for-invention-to-make-water-out-of-thin-air/msg0/#new

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 27, 2018, 02:26:30 am
content: If only we could find a way to extract and condense human stupidity out of thin air, now we could be on to something.

author: rrinker
author_rank: Super Contributor
timestamp: October 30, 2018, 03:19:27 pm
content: I think we do, it's called Indiegogo

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 30, 2018, 11:28:39 pm
content: Quote from: rrinker on October 30, 2018, 03:19:27 pm
Software for 50Mhz AD9850 Dual Channel Sine/Square Wave DDS Signal Generator - Page 1
Forum section: electronics / general

author: Doogs
author_rank: Contributor
timestamp: October 09, 2018, 10:30:07 pm
content: I purchased one of these boards on ebay. And when I finally got the software link and started going through the convoluted mess of folders trying to find a pin-out chart and the actual software my anti-virus had a hairy Kinipshit and quarantined just about everything, Turns out it was loaded with trojans and adware. Hence the Dodgy thread.I was wondering if anyone has a clean copy or knows a link to a clean copy of the software. I did manage to open a pin-out chart and schematic without a red flag going off so I do have that much. I would hate to throw this thing in the junk bin as it was $35.00CAD and he only gave me a $7.00 refund which was cheaper than mailing it back ( bartered a deal for some kelvin clips for my DER EE De500LCR so that was ok).Here's a pic of an identical board:Ok that didn't work let me figure this out

author: Brumby
author_rank: Unknown
timestamp: October 10, 2018, 02:21:24 am
content: No real comment on software - but there was some discussion on a board using this chip a while back:https://www.eevblog.com/forum/projects/chinese-ad9850-dds-modules-questions/msg476040/#msg476040Don't know if this will be of any use to you.

author: MasterT
author_rank: Frequent Contributor
timestamp: October 10, 2018, 02:31:30 am
content: What is uCPU? Google "arduino + ad9850" - plenty of libraries.

author: rhb
author_rank: Super Contributor
timestamp: October 12, 2018, 10:40:49 pm
content: That's just a DDS eval board. There is no MCU present. You have to connect it to something like an Arduino. There are probably more examples for the Arduino than anything else, but I'm sure that every MCU on the planet has had interface code written for these.The fact that yours has SMA outputs is a big step up from many versions. Since you're probably new to the field, "Arduino modules" are not very standard. They'll all work, but you have to check the pin assignments actually used. It's not difficult, but it's confusing if you don't know to do it. You'll find an example Sketch for the AD9850/1 in the Arduino IDE but you need to verify that the pin assignments on your board match the code."arduino ad9850 19581"will get you everything you need to know.

author: cdev
author_rank: Super Contributor
timestamp: October 27, 2018, 02:41:15 am
content: If I were you I would never ever install anything from a disk that came with the ebay modules, and instead go to the manufacturer of the chip or github, download source, inspect it visually, make any changes you need, and then compile it yourself.
prove that not all Aliexpress sellers know what they are selling - Page 1
Forum section: electronics / general

author: GreenHW_GUY
author_rank: Contributor
timestamp: October 14, 2018, 10:21:01 am
content: I was asking the seller to get the right info, because the info on the page was not right, and the answer didn't help me more. You can try to find the error

author: station240
author_rank: Unknown
timestamp: October 14, 2018, 11:14:34 am
content: RG58 is 50ohm (or 52), so either they meant to write RG59, or they got the resistance wrong.

author: GreenHW_GUY
author_rank: Contributor
timestamp: October 14, 2018, 04:33:39 pm
content: I know that why I don't get any good info Info from the seller, and all with Coax on aliexpress write the same, when you looking for the 50zCOAX, it was only for hobby project, my ham radio I use some highter Quallity Cables

author: Cyberdragon
author_rank: Super Contributor
timestamp: October 14, 2018, 06:05:35 pm
content: They don't use the RJ-59 designation (or at least properly) in China. They mark it based on wire diameter and connector type and not by the impedance standard. So yes, that cable is likely exactly as specified, it really is a 75RJ-58.https://www.eham.net/ehamforum/smf/index.php?topic=94343.0
Studiospares 44900/Soundking EE 301 Mic 48v Phantom Power Supply - Page 1
Forum section: electronics / general

author: TheBay
author_rank: Unknown
timestamp: October 25, 2018, 02:01:40 am
content: Picked this up from a second hand shop today, never seen one with a mains input before and it felt heavy so thought great it's got a nice linear transformer rather than a SMPS that some come with.Got it home and first thing I did was pop the cover off.Yes that label does say 170v on the transformer secondary winding, I got a reading of 220v unloaded with a 240v input.Who came up with the design for this? granted that PSU is rated at a low current but that's just not the point, the last thing you want is a Mic with 170v+ going up it if something goes wrong,look how they are are dropping this voltage, bridge rectifier to DC and some caps and resistors!Look a the X capacitor just held on with hot snot (It's actually come off!) and the connections are insulated with insulation tape!I dread to think what the other AC input is for, I'm wondering if that's for 100-120v countries and they don't bother with a transformer

author: Cyberdragon
author_rank: Super Contributor
timestamp: October 25, 2018, 04:06:21 am
content: Risk of visual shock, DO NOT OPEN!Don't worry it's "PPASS"ed it'll be fine right?(Chinesium alert)If the sockets are paralleled somehow then voltage should come out the other. That's probably the only reason for using an HV transformer.

author: dmills
author_rank: Super Contributor
timestamp: October 25, 2018, 10:51:56 am
content: It is difficult to see, but might that cap be in **series** with the transformer primary?This would kind of make sense if they were repurposing a transformer intended for a valve preamp or the like where a 220V secondary feels quite reasonable, still a nasty hack, but I can kind of see it.Regards, Dan.
Ionic foot detox electrode scam. How it works. - Page 1
Forum section: electronics / general

author: lordvader88
author_rank: Frequent Contributor
timestamp: September 22, 2018, 02:38:21 am
content: LOLI'm surprised rust is so varied in color. I never learned that in chem class

author: Money4Nothing
author_rank: Contributor
timestamp: October 01, 2018, 04:11:14 pm
content: LOLI love bigClive. I'm gonna run out straight away and get some freshly-prepared health-water.

author: ebastler
author_rank: Super Contributor
timestamp: October 02, 2018, 07:48:12 pm
content: Hope I‘ll remember this product next time I have toxic feet...

author: GregDunn
author_rank: Frequent Contributor
timestamp: October 02, 2018, 08:14:17 pm
content: Interestingly, podiatrists often use a similar device to treat plantar warts, though it only has one electrode in the device itself. The process is to clean the skin and scrape the area over and around the wart(s), then an electrode is actually attached to the leg. The electric current causes the salicylic acid suspended in the liquid to be drawn into the abraded skin, which of course is part of the typical treatment for warts. The alternative is to hack them out with a scalpel, which is faster but a bit more painful.

author: Cyberdragon
author_rank: Super Contributor
timestamp: October 02, 2018, 08:53:41 pm
content: Those devices are properly isolated and certified low current devices though. The fake things are often directly connected to mains or poorly isolated so capable of dangerous high current.
Something doesnt feel right: higher voltage = higher bills? - Page 1
Forum section: electronics / general

author: TomS_
author_rank: Frequent Contributor
timestamp: November 08, 2018, 08:59:21 am
content: https://www.abc.net.au/news/2018-11-08/high-voltage-fuelling-increased-electricity-consumption/10460212?fbclid=IwAR1prtZRlZIpINrQquRKUUC8WWJgxzzKGSyUV-kRJevqANKwcGMuA2MRaPoIn particular this quote:QuoteWhich seems to be a reference to the fact that higher grid voltages are causing people higher bills.Given this guy has apparently started a company selling devices to "burn off" excess voltage, as is my understanding of the wording of it? Kind of sounds like a scam in the making.

author: Ian.M
author_rank: Super Contributor
timestamp: November 08, 2018, 09:14:38 am
content: https://www.eevblog.com/forum/beginners/abc-news-posted-a-story-re-jacked-mains-voltage-is-increasing-power-bills/
Incredibly efficient solar panels - Page 1
Forum section: electronics / general

author: radu124
author_rank: Newbie
timestamp: September 21, 2018, 01:08:56 pm
content: This article suggests developments in solar PV that defy the laws of thermodynamics. I'm honestly unhappy seeing such articles, because they discourage people from investing in solar (why would you invest in solar if you are convinced much better technology is coming).https://www.designnews.com/electronics-test/huge-improvements-solar-energy-efficiency-reported-using-gold-nanoparticles/44243934459470

author: Raj
author_rank: Frequent Contributor
timestamp: September 21, 2018, 05:03:48 pm
content: I'd disagree.I think, normies will read it and think gold is expensive thus this too will be.
Patreon anti-robot security  - Page 1
Forum section: electronics / general

author: IanMacdonald
author_rank: Frequent Contributor
timestamp: August 02, 2018, 07:17:07 pm
content: Think this qualifies as 'dodgy technology' so...Message to Patreon support:I'm finding that logins involve multiple pages of captchas. Also, it is no longer possible to update the browser* without that triggering a security alert which calls for re-validation by email. This also makes it difficult to use a separate browser (even on the same computer) to test-out the problems.The captcha problem seems to be related to the use of privacy mode in Firefox.As far as I can see from a few tests, the way this captcha works is actually much simpler than they claim. It looks for tracking/profiling cookies from previous visits to sites bearing advert-agency javascript. In privacy mode these cookies are not retained beyond the end of the browsing session. If no such cookies are found, the captcha assumes you are a spambot.I cannot turn privacy mode off just for one site, and I don't think it's reasonable to expect that I should sacrifice my overall privacy for the sake of one site.Appreciate you have a need for robot protection, but this approach is problematic. Think for a moment about what it would be like if tens or hundreds of sites did this. Nobody would be able to update or patch their computer. -Would that be good for security?Sent from Chrome Portable 68 on a virtual machine, with Google DNS, no proxy, no Adblock Plus, no VPN. Even so the first login attempt took five captcha screens. (Which is exceptionally low, last time it was 18)-It remains to be seen how many captcha screens it will take to send this message. Unfortunately no way I can update you on that!Regards, Ian. (an IT professional)-------------------------------------Actually took well into double figures of captchas to send. I lost count.We do have a fairly sophisticated firewall here, but it causes no trouble on other sites. Damned if I'm going to turn it off (and hang a virtual 'kick me' sign on our IP address, so to speak) for the sake of Patreon, anyway.* You can actually get round this by setting a fake useragent string. Doing so might cause problems on other sites though, as you're then sending them disinformation as to what your browser's capabilities are.Bottom line, if they don't fix this soon I'm likely outa there. Sorry Dave et al, but my patience with this nonsense is coming to an end.
Quantum Battery, Instant charging- This seems a bit fishy. Is the concept sound? - Page 1
Forum section: electronics / general

author: optoisolated
author_rank: Unknown
timestamp: July 21, 2018, 04:00:35 am
content: Saw this article on ABC news today.. I'm certainly no expert on quantum physics.. But this seems a bit fishy to me. Anyone with any expertise/experience in this area able to provide any insight? In the article, the University Professor behind it seems to think he can get a working prototype happening in 6 months...http://www.abc.net.au/news/2018-07-21/new-technology-could-help-to-charge-your-iphone-instantly/10021086Battery could charge 'devices instantly'The concept of the battery will be developed at Adelaide University and could see electronic devices charged instantly.Dr James Quach said that once developed, the battery could be charged in less than a second."So for example your mobile phone at the moment will take, I don't know, thirty minutes or an hour to charge with the quantum battery and if we are successful it would have instantons charging so it would revolutionize the energy storage industry," he said."…what I mean is, the more batteries that you have, the quicker the charging rate."So how is this technology possible?Dr Quach said this technology would possible thanks to a feature of quantum mechanics known as entanglement."Quantum mechanics deals with interactions at the very smallest of scales, at the levels of atoms and molecules — at this level you get very special properties that violate the conventional laws of physics," he said."One of those properties is entanglement. When two objects are entangled it means that their individual properties are always shared — they somehow lose their sense of individuality.Dr Quach said he would "take the theory from the blackboard to the lab"."Entanglement is incredibly delicate, it requires very specific conditions — low temperatures and an isolated system — and when those conditions change the entanglement disappears," he said.A man looks at the cameraPhoto: Dr James Quach aims to build the world's first quantum battery. (ResearchGate)"In terms of time frames, I'm hoping to demonstrate this over the next six months and then after that try and take it further by scaling it up and making it more robust"The long-term aim is to scale up, to build bigger batteries which will support renewable energy technologies by making it possible for continuous energy supply no matter the weather conditions — rain, hail or shine."

author: TERRA Operative
author_rank: Super Contributor
timestamp: July 21, 2018, 07:21:13 am
content: So we need low (cryogenic) temperature batteries in isolated systems, read: useless, and the theory on paper can be made into a working prototype in 6 months?Tell 'im he's dreamin'....
Wireless charging bullshit in the making - Page 1
Forum section: electronics / general

author: Raj
author_rank: Frequent Contributor
timestamp: July 12, 2018, 07:28:13 am
content: https://hackaday.io/project/159661-charge-your-cell-phone-by-calling

author: Cyberdragon
author_rank: Super Contributor
timestamp: July 12, 2018, 02:06:40 pm
content: People still use that style of phone?

author: Brumby
author_rank: Unknown
timestamp: July 12, 2018, 02:22:09 pm
content: "At the time of call you are connected to cell phone tower. It spreads its RF signals. With these RF signals you can charge your cell phone."

author: StillTrying
author_rank: Super Contributor
timestamp: July 12, 2018, 04:10:53 pm
content: is not really enough.Using the battery's own power to charge itself, in about the most inefficient way possible."We have blinking LEDs lights on the back of our cell phone. When we make a call or receive a call these LEDs start blinking until call ended. Here we are going to use these LEDs to charge our cell phone."
DIY "Solder Mask" - Page 1
Forum section: electronics / general

author: Pbm2001
author_rank: Newbie
timestamp: April 28, 2018, 06:53:11 pm
content: I found this diy "Solder Mask" tutorial on youtube, thought you guys would get a kick out of it

author: Brumby
author_rank: Unknown
timestamp: May 05, 2018, 08:06:57 am
content: Yeah - it's green. It's not solder mask - not in any way.This is a classic example of why you need to keep a critical assessment of the things you find on the internet.

author: Fred27
author_rank: Unknown
timestamp: May 05, 2018, 08:11:17 am
content: There's a UV curable dry film solder mask called Dynamask 5000 that works well for home PCBs.

author: Cyberdragon
author_rank: Super Contributor
timestamp: May 05, 2018, 05:02:07 pm
content: Is that...a marker?

author: Brumby
author_rank: Unknown
timestamp: May 06, 2018, 01:20:20 am
content: Quote from: Cyberdragon on May 05, 2018, 05:02:07 pmIndeed - but this was the facepalm moment for me:.... Now what was the key property of "solder mask" ?

author: Gregg
author_rank: Super Contributor
timestamp: May 06, 2018, 03:31:16 am
content: I feel this kid may have a long and profitable career ahead-----------in marketing!The bullshit factor baseline has been established.

author: Bassman59
author_rank: Super Contributor
timestamp: May 07, 2018, 04:18:36 am
content: Quote from: Pbm2001 on April 28, 2018, 06:53:11 pmAlso useful for drawing rings around the edges of compact discs, for some reason I can’t remember.

author: GerryBags
author_rank: Frequent Contributor
timestamp: May 07, 2018, 08:00:33 am
content: It reminds me of Neil's (off of The Young Ones) recipe for Lentils & BreadIngredients: Lentils and bread.Method: Get some lentils and bread together.The only difference is that I think Neil's recipe actually does what it sets out to accomplish, whereas this.....

author: Lionered
author_rank: Contributor
timestamp: July 06, 2018, 11:58:44 am
content: Interesting, I hope this could really work. There's not harm trying though.

author: Brumby
author_rank: Unknown
timestamp: July 06, 2018, 01:56:22 pm
content: Quote from: Lionered on July 06, 2018, 11:58:44 amYouDOknow thepurposeof solder mask ... don't you?Then read this:

author: Raj
author_rank: Frequent Contributor
timestamp: July 09, 2018, 05:40:56 am
content: What part of the term 'solder mask' did this guy didn't understand.On top of that,he calls himself a 'master'.

author: Sudo_apt-get_install_yum
author_rank: Regular Contributor
timestamp: July 09, 2018, 09:01:58 am
content: Best thing in the video is the music and the drawings and the slides!Hopefully he grew up and realized that painting solder pads with permanent marker isn’t such a good idea

author: ebastler
author_rank: Super Contributor
timestamp: July 09, 2018, 10:57:15 am
content: Quote from: Raj on July 09, 2018, 05:40:56 amClearly a master of the marker pen!Just watch his bench surface in the video -- bears the marks of years of marker practice...

author: exit_failure
author_rank: Regular Contributor
timestamp: July 09, 2018, 11:04:56 am
content: My ears are bleeding now.
Solar Freaking Roadways Canada addittion  - Page 1
Forum section: electronics / general

author: conglomerationofowls
author_rank: Newbie
timestamp: June 29, 2018, 07:01:48 pm
content: Well never thought my old home town would be on the cutting edge of stupid but looky herehttps://www.myprincegeorgenow.com/78551/first-solar-road-in-bc-installed-at-city-hall/"The City of Prince George has partnered with YCS Holdings Ltd. who have installed a section of solar-panel road in the parking lot.The segment of Wattway solar-panel pavement connects to City Hall reducing consumption of energy and allows them to supply power to other areas, such as vehicle charging stations.Chris Simons, Division Manager, says this is just the beginning of what he hopes a future expansion.“Right now we are in the research and development stage so we want to trial it here and see how it stands up to Northern BC interior winters and it could be an opportunity for projects going forward to utilize this technology.Simons says with this installation, Prince George is making headway in renewable energy.“This is the first one in British Columbia and it’s the first one in a public environment in Canada.”The panels are installed without having to destroy or rip up the existing roads and can stand the weight load of an 18-wheeler truck."

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: June 30, 2018, 03:50:06 am
content: Oh NoesCompany Wattway by Colas:http://www.wattwaybycolas.com/en/Northern BC is noted for its cloudy skies/heavy rain and snow/. This is going to be epic.

author: X
author_rank: Regular Contributor
timestamp: July 04, 2018, 11:05:48 pm
content: All these solar roadways forget to mention the expected result after some professional amateur hooligans do some magic turbocharged donuts in the middle of the solar road during mating season, to show a female who is the dominant male.

author: thm_w
author_rank: Super Contributor
timestamp: July 04, 2018, 11:42:22 pm
content: That is disappointing.Quote from: conglomerationofowls on June 29, 2018, 07:01:48 pmBeing the first anything is not necessarily a benefit, but it is always spun that way. There are already solar parking lot covers at Grouse mountain and BCIT for example, which are tilted at the appropriate angle to the sun and will perform much better:https://www.bcit.ca/microgrid/energyoasis/

author: EEVblog
author_rank: Unknown
timestamp: July 04, 2018, 11:44:06 pm
content: Hang on,Oh, STOCK PHOTO

author: BrianHG
author_rank: Super Contributor
timestamp: July 05, 2018, 02:21:17 am
content: Quote from: EEVblog on July 04, 2018, 11:44:06 pmYou almost, almost, almost, almost, almost thought they were doing something smart like placing solar panels along the road's center or boarders aimed at the sun. I'm sorry, they don't have the brains for that actual functional, cheaper, more reliable, repairable, practical and sane idea.Too bad...
Deadly quack water tester - Page 1
Forum section: electronics / general

author: lordvader88
author_rank: Frequent Contributor
timestamp: September 22, 2018, 02:14:20 am
content: LOLSurely they at least sell them with an English warning, do not touch electrodes

author: Raj
author_rank: Frequent Contributor
timestamp: September 22, 2018, 05:41:49 am
content: cbc has an episode dedicated to it & other r.o. frauds
This needs a Dave Debunking - Page 1
Forum section: electronics / general

author: bCreative
author_rank: Newbie
timestamp: June 29, 2018, 03:58:46 pm
content: https://arstechnica.com/science/2018/06/splitting-water-for-fuel-while-removing-co%E2%82%82-from-the-air/I see so much wrong with this right out of the gate, but I really want to hear what Dave has to say without coloring his perspective with my own opinion.Yes, my account is brand new; long time lurker, first time poster.

author: Cyberdragon
author_rank: Super Contributor
timestamp: June 29, 2018, 06:54:19 pm
content: I don't see any problem here (except maybe efficiency issues).The wording is stupid but they're making H2for fuel cells as well as forming bicarbonate with hydrogen and water (and CO2of course). They aren't claiming free energy or anything.http://ion.chem.usu.edu/~sbialkow/Classes/3650/Carbonate/Carbonic%20Acid.html

author: JohnnyMalaria
author_rank: Super Contributor
timestamp: June 29, 2018, 07:21:07 pm
content: Agreed. It's perfectly reasonable.Bizarrely enough, I was have a conversation last night with someone about CO2production. You may know that Coca-Cola ran out of CO2in the UK recently. There's a pecking order for the use of CO2: medical, animal slaughter and then food/beverages.

author: Gyro
author_rank: Super Contributor
timestamp: June 29, 2018, 07:24:56 pm
content: It's worse than that, Warburton's has had to halt crumpet production!https://www.bbc.co.uk/news/business-44644407

author: JohnnyMalaria
author_rank: Super Contributor
timestamp: June 29, 2018, 07:39:09 pm
content: Say it isn't true!We're all doomed.
Biophotons and Quantumphysics in a handy device - Page 1
Forum section: electronics / general

author: compet17
author_rank: Regular Contributor
timestamp: June 26, 2018, 03:17:28 pm
content: It seems that the terms "Quantumphysics" and "Biophotons" are very popular in some circles. Has anyone ever heard of the MORA device? Invented by Dr. Morell and Mr. Rasche in Germany. Both were members of Scientology. So no wonder their device has some similarities to the famous E-meter...The MORA device is a bioresonance treatment and analysis device, whatever bioresonance exactly means. It seems that it can really help some people but in my eyes the effect is the same as a placebo.Wanna see it in HD and color? Watch the teardown video here:

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 26, 2018, 06:18:21 pm
content: FYI, there is actually a small amount of light emitted by the body. It's not visible by eye but is just sensible with a sensitive camera on long exposure (obviously, in a very dark room as well). The light is deep red, likely a product of oxygen radicals.Of course, this has nothing to do with whatever people think "bioresonance" might be. Just a little real-science trivia.Tim

author: Cyberdragon
author_rank: Super Contributor
timestamp: June 26, 2018, 11:18:03 pm
content: Good for components salvage. Nice transformer, interval timer (needs repair obviously), and meter movement.You could probably change the "wankery tube" for some inductors and it wouldn't care.
Prepare to be amazed by magnificence of the amazing hotness beam of hotness! - Page 1
Forum section: electronics / general

author: X
author_rank: Regular Contributor
timestamp: July 13, 2018, 12:57:22 pm
content: Ladies and gentlemen, introducingthe HASER!It's basically a beam of heat that follows you everywhere in the room, and by only heating you (and other people) up it is meant to achieve a higher level of efficiency than a standard heater.QuoteEDIT:The demo video was a hoot, but unfortunately today it got blocked for copyright. I'm not sure why, because there was no music I could tell, just some silly robotic voices. The two people would talk about the haser, then tell each other how hot they were, then take off their clothes and exit to the right, then perform an unknown ritual off camera.Sounds promising, but there is an elephant in the room:QuoteSome of the best whoppers areon the slides page:Because that's just what I want in a super-efficient heating system. A flexible API, WiFi/IoT, and Data storage and transfer. You know, just in case I want to back up the thermostat setting to the cloud because I have such a terrible memory.According to"the science"it uses IR lasers. This means it's perfectly safe for blind people.

author: Raj
author_rank: Frequent Contributor
timestamp: July 13, 2018, 03:33:36 pm
content: Lol.It learns.By the time it finishes learning,you'll be blind.

author: SL4P
author_rank: Super Contributor
timestamp: July 13, 2018, 06:57:17 pm
content: What? No Bluetooth!

author: BrianHG
author_rank: Super Contributor
timestamp: July 13, 2018, 07:45:09 pm
content: Time to radiate those sperm cells!Just look at the attached website photo with the heater aimed right up towards your balls... With some spec on the photo having a '666666'...