hybridfree/eevblog-posts huggingface dataset:
Benteng 3296 multiturn trimmer - quality? - Page 1
Forum section: electronics / general

author: Hydrawerk
author_rank: Super Contributor
timestamp: October 01, 2024, 04:31:02 pm
content: Anyone familiar with Benteng 3296 multiturn trimmer? Is it a low quality component? Who is the manufacturer? The wiper seems to be broken or missing. The center terminal is not connected anywhere.I desoldered it from a cheap LM317 module.

author: Raj
author_rank: Frequent Contributor
timestamp: October 01, 2024, 04:37:58 pm
content: they usually work for me, your one is worth a teardownEdit: I didn't notice the brand at first. Yeah, that's a totally no name brand and I haven't seen it used in Chinese products.

author: Hydrawerk
author_rank: Super Contributor
timestamp: October 01, 2024, 04:41:39 pm
content: I have a second one which seems to be OK, but I prefer a genuine Vishay multiturn trimmer.

author: Kean
author_rank: Unknown
timestamp: October 01, 2024, 04:59:45 pm
content: These fake/clone Bourns multi-turn trimmers are a pain. Even if they seem to be OK initially, they often have a terrible TC or build quality that can cause malfunctions in wide-temperature environments.

author: thm_w
author_rank: Super Contributor
timestamp: October 03, 2024, 08:59:33 pm
content: Never had any issues with similar brands, but there are so many brands and who knows who is making what.And obviously they are nowhere near as good as an original Bourns.https://www.eevblog.com/forum/chat/bonens-%28bochen-also-works-here%29-counterfit-bourns-trimpot-analysis/https://modwiggler.com/forum/viewtopic.php?t=191901Baoter:https://www.aliexpress.com/item/1005006846926629.htmlLCSC sells Bochen if you want a trusted supplier:https://www.lcsc.com/product-detail/Potentiometers-Variable-Resistors_BOCHEN-Chengdu-Guosheng-Tech-3296W-1-103_C118954.html

author: Raj
author_rank: Frequent Contributor
timestamp: October 04, 2024, 06:56:39 am
content: You underpay your workers, and they slack off and forget to insert the wiper. I request a teardown.

author: mikerj
author_rank: Super Contributor
timestamp: October 12, 2024, 10:46:45 am
content: Benteng, Bochen, Bonen etc. are low quality Chinese knock-offs of Bourns Trimpots. You get what you pay for.
ebay guitar to phone adapter - Page 1
Forum section: electronics / general

author: Circlotron
author_rank: Super Contributor
timestamp: October 11, 2024, 11:42:29 am
content: Step 5 sounds interesting.

author: pcprogrammer
author_rank: Super Contributor
timestamp: October 11, 2024, 12:04:26 pm
content: But you have to learn how to, or find someone who can,palythe quitar first.See item 7 on the list.Edit: And you can be sure that every one sold has its own new branding.Quote

author: themadhippy
author_rank: Super Contributor
timestamp: October 11, 2024, 12:05:12 pm
content: will it work with the guitar i bought here

author: Bryn
author_rank: Regular Contributor
timestamp: October 11, 2024, 01:57:51 pm
content: I've seen plenty of dodgy product descriptions like these on Amazon... they really make the item worth paying for, don't they?

author: coppice
author_rank: Super Contributor
timestamp: October 11, 2024, 02:12:26 pm
content: Is this product branded as "Translate Server Error"?

author: MrMobodies
author_rank: Super Contributor
timestamp: October 11, 2024, 07:29:17 pm
content: I thought I posted something here earlier and it's gone.QuoteWhat new brand or as usual is it just the same as the others but with a different name.100% correct that the brand is different but "high quality" sounds to me a matter of opinion from the quality of their typing "insert ADAPTION of bass guitar despite getting it about right in the sentence above "adapter in headphone jack" and the full stop at the starting of the sentence in 6 and 8. Maybe in terms of Chinglish might be 100% correct.
Pressure Releave Valve for an Enclosure? - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: July 21, 2024, 06:58:03 pm
content: HiI bought a while ago an Box where Various USB Device will be inside who are get connect to the Ouside with an Glasfiber Extender where the Cable run truth some "Animal Proofe" Connector. Since the Box will sit in my Attic where its damn hot in Summer and near 0 in Winter there will be a Temperature difference and Air Pressure Difference.I looking for some kinf of Breathing Valve, Over Pressure Valve who maybe let Moisture out and not in when there is an lower Pressure inside the Case and the slowly sip Air truth the thiney Gaps.And Yes everything must be Bug Safe since I cant "de Bug" the System when I am abroad.So maybe someone know that stuff who I can screw into the Case.Thanks

author: themadhippy
author_rank: Super Contributor
timestamp: July 21, 2024, 07:49:40 pm
content: tyre valve put in backwards?

author: Gregg
author_rank: Super Contributor
timestamp: July 22, 2024, 12:48:21 am
content: Search for sintered bronze pneumatic mufflers or if you prefer the aquarium industry uses stone diffusers for air supplies into fish tanks. The pneumatic bronze ones usually have pipe threads making them a snap to install

author: floobydust
author_rank: Super Contributor
timestamp: July 22, 2024, 01:26:06 am
content: I useGore-Texair vents, you can also find them on car headlights, surfboards etc.

author: amyk
author_rank: Super Contributor
timestamp: July 22, 2024, 04:04:42 am
content: What's the concern? There's not going to be much of a pressure difference in your use-case, certainly not enough to cause anything to explode. I'd just seal it hermetically.

author: tszaboo
author_rank: Super Contributor
timestamp: July 22, 2024, 09:59:41 am
content: Just add a textile stealth to any of the cable glands.But I hardly think it's necessary.

author: Lord of nothing
author_rank: Super Contributor
timestamp: July 22, 2024, 11:07:48 am
content: I would like getting the moister out of the Case.

author: Refrigerator
author_rank: Super Contributor
timestamp: July 23, 2024, 06:20:25 am
content: There are solid state dehumidifiers for sealed enclosures, that drive out moisture over time when power is applied to them.

author: floobydust
author_rank: Super Contributor
timestamp: July 23, 2024, 07:08:22 pm
content: Conduits leading into an enclosure can pipe in air and moisture. More so if the enclosure is up high (i.e. attic) where there is a temperature gradient and wind causing delta-P.In the case of HazLoc, they require a seal (Chico cement) to prevent gas ingress.So OP should seal off the conduit coming in, if he's using that. I can't quite tell:Quote from: Lord of nothing on July 21, 2024, 06:58:03 pm
12V to 324V super-duper-kalooper blast converter: I can't believe my meter - Page 1
Forum section: electronics / general

author: BrainyCapacitance
author_rank: Contributor
timestamp: June 14, 2024, 04:59:22 pm
content: below is the schematic for a "blast" converter that can somehow "blast" the input voltage by more than27X!!!!![ Attachment Invalid Or Does Not Exist ]I tried running this exact circuit on my breadboard with a 12V 2.5A power supply and my 1kV meter. when I ran it, my meter (it was on 1kVDC mode) read324V. there is a problem with this circuit though, you absolutely cannot short the MOSFET (things like reading current) but, since this is aboostconverter and not a buck converter, I think the output current should be the same as the "outside" current (the current that is still in thebreadboard "bus" while the circuit is running is, in this case 2.3A) but wouldn't that mean the output is 745.2W?!?! but the input is 30W max! is there something wrong with my meter, or something wrong with me? or did I just create a super-stepper?

author: Xena E
author_rank: Frequent Contributor
timestamp: June 15, 2024, 01:09:40 pm
content: Your meter is telling the truth.The topology you are using will, without regulation or load just jack the voltage until something in the circuit breaks down and clamps or, leakage loads the output.You won't get 745W out of it. Try loading it down and measuring the voltage then.Have fun but be careful at those voltages.

author: Someone
author_rank: Super Contributor
timestamp: June 16, 2024, 12:25:29 am
content: Avoid open loop power switching, too easy to blow up components or have dangerous output voltages.This forum has a better example with a current regulated design:https://www.eevblog.com/forum/projects/555-timer-boost-converter-(and-buck-converter)-switching-power-regulator/These run in simulation so you can experiment with all sorts of ideas before trying them for real.

author: BrainyCapacitance
author_rank: Contributor
timestamp: June 16, 2024, 04:56:05 pm
content: in real practice, C3 should be ≥1000uF and rated for ≥480V. and Q3 (supposed to be Q1) would also be something like one of those 650V GaN FETs. I don't have my 1500uF 500V E-Cap yet, but THEORETICALLY, with a 1500uF cap, it should be able to handle SOME kind of load.

author: Refrigerator
author_rank: Super Contributor
timestamp: July 23, 2024, 06:09:58 am
content: I used my two transistor boost converter design to boost from a single 3.7V Lithium cell to 200V regulated output voltage at about 1W of output power.It's doable and pretty easy, you just need a suitable FET and diodes/caps on the output.I used the same design to build an isolated high voltage supply for a homemade fly swatter. It would boost the voltage to about 1300V through a transformer and would vaporize flies on contact, thanks to a large capacitance on the output, which made the design self-cleaning.PS: i'm not sure what your original circuit was, as the attachment does not exist anymore.
My new discovery - reducing disorder in a system was easier than increasing it  - Page 1
Forum section: electronics / general

author: Circlotron
author_rank: Super Contributor
timestamp: June 25, 2024, 01:33:55 am
content: True story. Today I asked the boss for a day off. That introduced a degree of disorder into the system because some work might not get finished on time, so it needed some persuading. Then later on I found I didn't need to take the day off after all, so I cancelled that request. That reduced the disorder in the system, but that was easier to accomplish than making the disorder in the first place. What is the significance of that?As an aside, I misspelled the word "disorder" three times while typing this post.

author: RJSV
author_rank: Super Contributor
timestamp: June 25, 2024, 04:15:00 am
content: Need more info to reply accurately.But the off the cuff guess would involve timing, as the Boss maybe didn't yet complete the adjustments needed. So the Boss simply cancelled the overtime request.Maybe (Boss) asked someone else, to 'find somebody that can cover the hours that will be missed, and that assistant person had not yet set up the substitute.So it could have been a minor relief, as the task to find temp replacement wasn't itself completed.Is this an ENTROPY question ?
hmmm lets use the hammer to loosen the errr - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: June 14, 2024, 04:29:56 am
content: hmmm a laser sintering printer ?what to do ?is it dodgy ?or not dodgy ?cranky printernot cranky printer$1.6million yankee bucks on kickstarter as of this postanybody have $3.7k to part with ?https://www.kickstarter.com/projects/micronics3d/micron-a-desktop-sls-3d-printer/descriptionedit*the video shows the motor auger unit can be removedthey did not appear to understand the jam in scotty's unit ?they did not appear to have a spare motor unit which could be shipped ?

author: racemaniac
author_rank: Contributor
timestamp: June 14, 2024, 08:20:54 am
content: I think it's an awesome project, don't think i'd like to buy the first generation of a device like this, but it seems like a decent start for these kind of machines.Already saw the youtube video of the first guy that was pretty negative, but not sure if i agree with him. Its obvious that he got a handmade beta unit that's the first time they're shipping these things around, of course things break and go wrong, but as other videos showed, this thing actually works, and if they can get their plastic parts in decent quality, this is a great device for a great price.Looking forward to how this evolves, and i can very well imagine a lot of people support this on kickstarter, stuff like this is what kickstarter is made for, a starting company with a good idea and a working proof of concept looking for funds to clear the last hurdles & bring it to market.
A New Kind Of Electricity - Page 1
Forum section: electronics / general

author: BILLPOD
author_rank: Frequent Contributor
timestamp: July 03, 2024, 01:12:06 pm
content: Good Morning Everyone, check this out:https://www.tiktok.com/t/ZTNMX5NxG/

author: Krotow
author_rank: Regular Contributor
timestamp: July 03, 2024, 02:58:39 pm
content: What it is? Another perpetual machine? TikTok page display only static image and I have no wish to register in that garbage.

author: racemaniac
author_rank: Contributor
timestamp: July 03, 2024, 03:08:24 pm
content: Yup, same issue here, isn't the video somewhere on a decent site?And looking at the comments part of the video appears to be lighting a 800-1200W light to prove his point, with people pointing out that even though the light gives some light, it's obviously not running at 1kW in the tests since it doesn't produce anywhere near enough light for that, but at way lower power it'll already produce some light, so he should just measure the actual power instead of being like "look, this kW light is giving light so i'm producing 1 kW"

author: Kim Christensen
author_rank: Super Contributor
timestamp: July 03, 2024, 03:12:57 pm
content: Video played fine for me. I'm not signed up for Tiktok either.Youtube version:It's definitely not AC...It's not DC...It's 100% BS!

author: themadhippy
author_rank: Super Contributor
timestamp: July 03, 2024, 03:20:58 pm
content: At last a clear explanation of the difference between AC and DC, DC you have to real heavy wire but AC only needs real small wires .

author: Haenk
author_rank: Super Contributor
timestamp: July 03, 2024, 03:38:03 pm
content: Imagine you just invented something worth trillions of $$$ - and invest all your money into the shittiest phone with a "camera" to present your findings to the world.

author: glentek
author_rank: Regular Contributor
timestamp: July 16, 2024, 02:17:43 am
content: Here is a comment from the youtube video that sums it up:"This is the guy from Steven Greer's movie "The lost Century: and how to reclaim it" ... the guy they recorded on hidden cameras and altered his voice. He talks about how he was threatened with prison time if he ever built these devices again. Or if anyone else replicated them. He tried to patent one of his devices back in 1986 and was given a secrecy order under the guise of national security. He had many devices working. I forget his name but you can find other videos of his on youtube."Also for a laugh, look at the user reviews on IMDB for that movie.https://www.imdb.com/title/tt27680530/reviews?ref_=tt_urv

author: vk6zgo
author_rank: Super Contributor
timestamp: July 16, 2024, 04:07:21 am
content: "Mad as cut snakes!"
ID Picture ? - Page 1
Forum section: electronics / general

author: RJSV
author_rank: Super Contributor
timestamp: June 05, 2024, 12:35:42 am
content: Myself, in Half-Lotus yoga maneuver

author: RJSV
author_rank: Super Contributor
timestamp: June 05, 2024, 12:40:22 am
content: Yay, I've managed to get right combination of moves, to include a simple photo!That's me, last year, 2023 just about to turn 70!Sorry that I've lost the e ^-^ven better YOGA photos, from mid-90'sI'mMany folks don't realize, doing YOGA can be very exciting...accomplishment, but also physically a thrill, to do the stretches, and Chi-Gung derivative mat work.Enjoy.

author: Nominal Animal
author_rank: Super Contributor
timestamp: June 05, 2024, 07:49:43 pm
content: "Besides, it is a disgrace to grow old through sheer carelessness before seeing what manner of man you may become by developing your bodily strength and beauty to their highest limit. But you cannot see that, if you are careless; for it will not come of its own accord."-Socrates

author: RJSV
author_rank: Super Contributor
timestamp: June 05, 2024, 10:02:47 pm
content: Thanks.Relating to Technology and Science creativity, I've found that having the side practice, developing intuitive-based flexibility work is helpful. Often too helpful, as various 'novel' ideas, or offshoots of main ideas can be....a distraction!I've written books:'Ten Things Wrong with City Hall',A book with 10 Zen-like revelations and mechanical novelties:I.E. 'Just in time Spokes'. for a idea borrowed from Economic theory...'Bean-Bag theory'... A treateast on trace chemical impurities, (and Chi')Various firmware functional mangling....NOT available, in bookstores everywhere.Accomplished: 32 inch waist (and beginnings of a 'cut' look in upper body.)Main relevance here, is the boost one can get in creativity and imagination.Friends and relatives dying off, all around me, as I try to push approx. 3 times per week, on the outdoors mat.Longevity,...Yay
ARO-GEL REVIVAL.   Possible. technology ? - Page 1
Forum section: electronics / general

author: RJSV
author_rank: Super Contributor
timestamp: June 01, 2024, 04:24:58 am
content: Thinking about if would need a licence / royalty deal, to mess around with selling a novel product, or two:CBD 'Gummie Bear's. A newer medical application is the current innovation in Cannabis derived, non-psychoactive edibles, for sleep and various stress disorders, and seizure disorders.Maybe areogel could be 'flavored', like raspberry or other sweet types.Hamster bedding ( ??). The strength to weight ratio is high enough, to support a 2 kg hamster.Etc.etc. There might be a good list, already, I haven't looked closely at what's already out there. Maybe NASA has some introductory phampletts or something.Right now, a frozen Raspberry Gelgurt sounds refreshing.How about Areogel m&M's (tm)?I keep going back to FOOD, somehow. Heck, I'm not even sure if it isn't toxic ?Then: Areogel Rat-poison ?The FOOD snacks or medical edibles sounds the most novel. ? ? ? ? ?

author: coppercone2
author_rank: Super Contributor
timestamp: June 01, 2024, 05:30:01 am
content: I dunno they say bad things about dioxides in food like silicon and titaniummy gut says that its better without inorganic substances addedeven for medication, gel-type coatings are seen as healthier then 'hard' pills. I think the main area of research right now is molecules that have fat on 1 side and salt on the other to make boundaries. The money is gonna be on nature derived.and consumers are more and more distrusting of foam type substances, because they deteriorate so easily. i.e. black foam in CPAP, the memory foam "powders" etc.it seems that if it powders easily, its bad news. Even flour, look up baker's lung.it might be successful if its an alternative to something that makes micro plastic dust though.I view foam as a cheap material, made in molds on dirt in pakistan, as something that is known to off-gas, deteriorate, crumble, smell, etc.... and is used as a cheap alternative to proper engineering. (instead of clamps).
Oreo better than statin! - Page 1
Forum section: electronics / general

author: SiliconWizard
author_rank: Super Contributor
timestamp: January 31, 2024, 01:50:22 am
content: https://www.mdpi.com/2218-1989/14/1/73Fun stuff.

author: PartialDischarge
author_rank: Super Contributor
timestamp: January 31, 2024, 02:08:18 am
content: Seems to me the keyword there should be ketogenic, but decided to go with Oreo for publicity reasons.

author: sslupsky
author_rank: Contributor
timestamp: May 05, 2024, 10:52:07 pm
content: Food for thought. Consider that there is strong evidence that data was withheld by researchers that undertook highly influential pivotal studies into diet and heart health.https://intheloop.mayoclinic.org/2017/08/24/fathers-sons-and-a-new-take-on-old-research/
The confused solder station - Page 1
Forum section: electronics / general

author: jason random
author_rank: Newbie
timestamp: March 18, 2024, 10:54:33 pm
content: saw this recently at fakebook marketplace. It's having an identity crisis. When I queried the seller if they changed the face plate they wouldn't respond.

author: Ranayna
author_rank: Super Contributor
timestamp: March 19, 2024, 02:29:21 pm
content: Even on the label it is both 937D and 858D937D seems to be the proper model though i would say: I can only find 937D as soldering station and 858D as hot air station.Voilamart GmbH is also quite interesting. Voilamart seems to be an australian company, but GmbH is german, the german version of a limited liability company.Google knows a Voilamart GmbH that is closed.

author: Haenk
author_rank: Super Contributor
timestamp: March 19, 2024, 07:12:49 pm
content: Voilamart is a chinese company:https://uspto.report/company/Lin-YantaoThe brand is registered for some stuff, but not for most of the stuff they sell.The german company (GmbH) is still registered, but has never filed anything. Very likely a case of tax fraud.All in all this seems to be a verysecretiveodd company, there are literally no infos available - still they sell via Amazon and their own websites.

author: thermistor-guy
author_rank: Frequent Contributor
timestamp: May 02, 2024, 06:11:43 am
content: Quote from: Haenk on March 19, 2024, 07:12:49 pmRecently I've noticed Chinese companies using Western sounding brand names and company names, and US/EU URLs, to try to hide the Chinese origin.

author: mendip_discovery
author_rank: Super Contributor
timestamp: May 10, 2024, 12:23:54 pm
content: Quote from: thermistor-guy on May 02, 2024, 06:11:43 amThey also use localised addresses to also get people to buy.Recently we had a chinese firm ask my firm to confirm or deny that we gave thier customer permission to use the company name to register Chinese urls. I suspected it was part of a scam if we responded.

author: Refrigerator
author_rank: Super Contributor
timestamp: May 14, 2024, 01:20:10 pm
content: Regular chinese no-brand generic product being labeled whatever hits the most tags to drive salesI highly recommend switching to T12 based stations because they're just so much better and cost the same or less.I used to have these stations and they suck so bad. Works ok if you're a newbie but changing tips is a pain and cracking the heating element is an even bigger pain yet.
KCD-11 rocker switch from aliexpress is junk - Page 1
Forum section: electronics / general

author: dusan
author_rank: Regular Contributor
timestamp: April 21, 2024, 08:30:02 am
content: I recently had troubles with KCD-11 switches I bought on aliexpress (https://www.aliexpress.com/item/1005001513148147.html), they had 100s of ohms ON resistance. I don't think I used them much, maybe few hundred times. I dissasembled it and found that the seat have worn spots in nickel plating where the botom of the plate is touching the center pin. I did paid $1/10pcs free shipping so, I don't know what I expected. Rant over.

author: dusan
author_rank: Regular Contributor
timestamp: April 21, 2024, 09:29:17 am
content: Here's frequency measurement before (yellow) and after switch replacement (cyan)

author: BrokenYugo
author_rank: Super Contributor
timestamp: April 21, 2024, 01:17:06 pm
content: Yeah definitely don't go too cheap on switches, bad contacts, melty cases, etc.

author: thm_w
author_rank: Super Contributor
timestamp: April 25, 2024, 09:03:38 pm
content: The thing is some suppliers with the exact same looking part might be great. But yeah these look cheap.LCSC has some from 10c each that I'd probably trust more:https://www.lcsc.com/product-detail/span-style-background-color-ff0-Rocker-span-Switches_SHOU-HAN-KCD11-2P-R_C5884414.html(hundreds of options just picked the first one).

author: Kleinstein
author_rank: Super Contributor
timestamp: April 26, 2024, 06:38:27 am
content: Mechnical contacts can be tricky with small signals. A good low ohm contact may need a certain minimum current to flow.The switch could well be OK for other uses (e.g. to switch a light or possibly even mains).The construction looks cheap, with no extra contact material. The problem may not be the worn spot, but possibly just an oxidized or oily contact surface.

author: Stray Electron
author_rank: Super Contributor
timestamp: April 26, 2024, 03:19:47 pm
content: Quote from: Kleinstein on April 26, 2024, 06:38:27 amX2. The OP should look up the term "sealing current" or "wetting current". I found out about this early in my career when I tried to use a normal AC switch in a low current digital circuit. A digital rated switch was about 3x the price but it worked and a standard switch simply wouldn't, even when brand new.Also on those Chinese made switches it very likely that the contacts were made of steel and had a very thin layer of tin on them and that the plating wore through very quickly. I've found that to be VERY common in cheaply made wire, bulbs, sockets, switches, etc.
RooBadge - new mosquito, I mean kangaroo repelent from straya? - Page 1
Forum section: electronics / general

author: dusan
author_rank: Regular Contributor
timestamp: June 04, 2024, 05:45:58 am
content: I've just seen advert for RooBadge:And on VW official site:https://www.volkswagen.com.au/en/roobadge.htmlSome say it's april's fool joke, but VW insist on it being real, what are your opinions?

author: Haenk
author_rank: Super Contributor
timestamp: June 04, 2024, 11:25:02 am
content: "Last Modified: 2024-05-14 03:56:14"That would be quite some effort for April 1st.However, this study suggests it being nonsense:https://www.researchgate.net/publication/261826056_Deterrence_of_Kangaroos_from_Agricultural_Areas_Using_Ultrasonic_Frequencies_Efficacy_of_a_Commercial_DeviceNot sure how kangooroos behave (they are quite rare in northern Germany), but blasting sounds at 150db might actually make them flee, I suppose.

author: Someone
author_rank: Super Contributor
timestamp: June 04, 2024, 11:41:57 am
content: Snake-oil-ishThese sorts of things have been around a long time:https://www.shuroo.com.au/aboutQuestionable efficacy.

author: m98
author_rank: Frequent Contributor
timestamp: June 04, 2024, 05:39:08 pm
content: As I understood, the VW device is more like a phased array speaker and does project audible animal sounds that Kangaroos would flee from. Seems plausible enough.
hmmm NASA spending logic ? - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: July 22, 2024, 06:38:38 am
content: So cancelling it saves $84millionbut they need to send a test mass instead ?how does it work ?https://www.nytimes.com/2024/07/17/science/nasa-viper-moon-rover-canceled.htmlhttps://www.smithsonianmag.com/smart-news/nasa-cancels-viper-moon-mission-after-spending-450-million-to-build-a-rover-180984744/

author: 10maurycy10
author_rank: Newbie
timestamp: July 22, 2024, 07:42:03 am
content: Why not use a totally-not-a-rover rover shaped test mass? It's better if the thing is unfinished, because it will not be a functional rover, at least not by the specifications, but might still be usefull.

author: Psi
author_rank: Super Contributor
timestamp: July 22, 2024, 08:18:25 am
content: Sometimes NASA will cancel something for budget reasons that they know will cause an outcry, or threaten to cancel it.Even when they have other options to save the money required to not cancel that thing.They know if they cancel something important the outcry will likely trigger a boost in funding just to save that thing.It's all politics and methods to get as much funding as they can.It can of course backfire though.In this case though, it looks like it was all contract based, it went too far over budget and triggered a cancellation.
Another Aliexpress capacitor-fest - Page 1
Forum section: electronics / general

author: 5U4GB
author_rank: Super Contributor
timestamp: March 19, 2024, 12:16:34 pm
content: Another piece ofcapacitor artwork from Aliexpress:It looks like a sort of Greek-temple inspired artwork, a colonnade of supercaps surrounding Doric(?) rows of electrolytics and then an inner sanctum (cella) of SMD caps, because if one is good and ten are better then seventy must be even betterer.You can complement it with thissuper DAC:

author: Haenk
author_rank: Super Contributor
timestamp: March 19, 2024, 01:34:37 pm
content: I really wonder if the discrete DAC is any good. For 1k (plain PCB) it really has to be exceptional, which I doubt. Will it beat the 1792s in my Denon player? Or the 1704s in my Denon amplifier?

author: 5U4GB
author_rank: Super Contributor
timestamp: March 20, 2024, 04:55:52 am
content: I was curious too and did a quick search for "ladder dac", and have discovered that they'rea thing in the audio woo-woo world, so this isn't just some random electronic art curio. Of course the results are, uh,mixed.Still, a great way to turna few dollars in SMD resistorsinto $1,000+ of audio gear.

author: Haenk
author_rank: Super Contributor
timestamp: March 20, 2024, 11:25:46 am
content: It seems, tested discrete DAC is not bad, but not better than an average integrated DAC, while good DACs will only cost a third. So probably only a waste of money, they look impressive though.

author: SiliconWizard
author_rank: Super Contributor
timestamp: March 20, 2024, 08:41:07 pm
content: It's IMO a complete waste of money compared to a good, modern sigma-delta DAC and I doubt it comes close in terms of THD.But hey yes, that looks cool. Whatever floats one's boat really.

author: tszaboo
author_rank: Super Contributor
timestamp: March 20, 2024, 10:38:57 pm
content: Quote from: 5U4GB on March 20, 2024, 04:55:52 amHopefully nobody tells them about the thermometer coded DACs or string DACs because sooner or later we will see DACs with 2^24 resistor in them.

author: 5U4GB
author_rank: Super Contributor
timestamp: March 21, 2024, 09:20:49 am
content: Quote from: tszaboo on March 20, 2024, 10:38:57 pmNah, what you need is awhiffletree DAC. Just feel the audio purity created through the use of a purely mechanical DAC!

author: Kim Christensen
author_rank: Super Contributor
timestamp: April 02, 2024, 11:29:29 pm
content: I remember long ago driving a R2R DAC from a 27C256 UVEPROM as a crude voice playback method. Never knew it was sooo fancy!Quote from: 5U4GB on March 20, 2024, 04:55:52 amLove how they called it a "Professional designedo-ring transformer" in that thing.

author: themadhippy
author_rank: Super Contributor
timestamp: April 03, 2024, 12:51:05 am
content: Quoteuse wet string if its an AES signal

author: 5U4GB
author_rank: Super Contributor
timestamp: April 03, 2024, 01:04:12 am
content: Quote from: Kim Christensen on April 02, 2024, 11:29:29 pmJust remember to never run your o-ring transformers at temperatures below 53 °F (12 °C), lest it cause o-ring erosion and they let all the electrons out.
Manufacturers hate this simple trick. - Page 1
Forum section: electronics / general

author: dusan
author_rank: Regular Contributor
timestamp: March 17, 2024, 03:49:23 pm
content: I asked copilot what is 16-bit version of MCP4728 DAC and AI told me I can just pass 16-bit value for more accuracy!

author: Haenk
author_rank: Super Contributor
timestamp: March 17, 2024, 05:04:13 pm
content: Damn, I wish they knew that in the 80s.That would have saved them so much trouble.Now - did you try it with - drumroll - 32bit resolution?

author: bingo600
author_rank: Super Contributor
timestamp: March 17, 2024, 05:13:42 pm
content: Yipieee ....I'll go and load a 64-bit OS on my 32-bit MCU ASAPThat would prob work too .../Bingo
Finally true advertising on Aliexpress - Page 1
Forum section: electronics / general

author: 5U4GB
author_rank: Super Contributor
timestamp: February 14, 2024, 11:42:19 am
content: Just stumbled acrossThe Most Dreadful Energy Modules In The World, presumably just the usual string of large fake-branded capacitors strung between the input and output, but at least they're being honest about how dreadful the product is.Of course then there's the usual "advanced defense grade nano-materials" and "latest ultracapacitor and lithium battery technologies", but at least they don't beat about the bush when they describe the quality of the product.

author: thm_w
author_rank: Super Contributor
timestamp: February 15, 2024, 10:15:41 pm
content: They don't show the inside, but, you can find similar products that are useful for small amplifiers, eg:https://www.aliexpress.us/item/3256805735465143.htmlQuote

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 15, 2024, 10:49:13 pm
content: Quote from: 5U4GB on February 14, 2024, 11:42:19 amYes, I'm sure it is poor chenglish translation of a title that was meant to make it look powerful, rather than a trait of honesty.

author: Eagcress88
author_rank: Contributor
timestamp: February 16, 2024, 05:30:52 pm
content: They got a bit off with the choice of words.

author: TimFox
author_rank: Super Contributor
timestamp: February 16, 2024, 07:39:34 pm
content: A bit of archaic English, like King James’ translators addressing him as “Most Dread Sovereign” in the Epistle Dedicatory to the Authorized Version of 1611.
Alef Aeronautics - Flying car - grab the money and (run) fly away - Page 1
Forum section: electronics / general

author: Haenk
author_rank: Super Contributor
timestamp: March 05, 2024, 09:12:37 am
content: https://www.cnbc.com/2024/03/04/flying-car-firm-alef-hits-2850-preorders-worth-over-850-million.htmlYeah, sure.HyperloopTunnelFlying Car!I think I see a trend there, Elon.
This connector can kill you - BigClive - Page 1
Forum section: electronics / general

author: Helio_Centra
author_rank: Regular Contributor
timestamp: February 13, 2024, 04:44:27 pm
content: https://www.youtube.com/shorts/PmhgNWhmJiELooks like a new Chinese iteration on the older style of Wago that the Chinese manufacturers made knockoff a pass-through version of. Wago made a pass-through on the clear 221 probably in response to the knockoff pass-through ones from China. But this new one is not keyed to block plugging it in incorrectly.
Cheap USB Microscrope - Page 1
Forum section: electronics / general

author: msuffidy
author_rank: Frequent Contributor
timestamp: January 20, 2024, 02:47:25 am
content: I got a used China special 1000x USB microscope a few days ago for $5 Canadian. The big problem is it has to be almost right next to whatever you are viewing so you can't get a soldering iron in. Some people have modified them or stuck a reverse lens on them to make them ok to act like a low res overhead microscope.I used convert -average to blend noise into the median of like 30 frames each here.

author: magic
author_rank: Super Contributor
timestamp: January 20, 2024, 12:25:19 pm
content: These are glorified webcams with macro lenses. Short focal length, short working distance. Only useful for looking at things.I also got one for $5, mine is 1080p

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: January 20, 2024, 01:15:49 pm
content: I use an Elmo Document Camera. There are some used on ebay. Apparently they are used in schools and are replaced by newer models from time to time. New they are quite expensive, but used are quite affordable. I bought mine for $15 and then bought an old monitor. This is not perfect but gives a nice distance to the part and enables soldering.There are various configurations of these things that use different monitor connections ( Some HDMI ) and ones with a "stage" for the document (or PC board) and ones that are free standing. Take a look around ebay or other used equipment sites.

author: Helio_Centra
author_rank: Regular Contributor
timestamp: January 31, 2024, 02:12:48 am
content: I dunno I spent $100 on a cheap amazon electronics microscope and it works. Even came with anti-glare lights.|https://www.amazon.ca/gp/product/B07G92FG7L/It is out of stock, but other similar ones are out there.
Cut your Power Bill in Half! - Page 1
Forum section: electronics / general

author: d-smes
author_rank: Regular Contributor
timestamp: November 21, 2023, 06:46:28 pm
content: That's right- Plug this device into an outlet near your electrical panel and save up to $3000/year on your power bill!!!https://www.getconsumerchoice.com/shopslashwatts.phpIt's called Pro PowerSave and its tech was originally created by no other than the legendary Serbian-American inventor, electrical engineer, mechanical engineer, and futurist, Nikola Tesla.Hadn't they just invented the light bulb in Tesla's day? I wonder how he came up with this!

author: themadhippy
author_rank: Super Contributor
timestamp: November 21, 2023, 06:54:44 pm
content: Wallob.For just £99.99 (inc p+p) i'll send you a device that will cut ALL your bills in half,or quarters or even eighths.please note device only works for customers who receive paper bills.

author: SiliconWizard
author_rank: Super Contributor
timestamp: November 21, 2023, 09:52:51 pm
content: I think for just a few bucks, we can send something that will alleviate all of your problems in a split second.It will come with a disclaimer and a guide for your family.

author: chris_leyson
author_rank: Super Contributor
timestamp: November 21, 2023, 10:43:22 pm
content: Big Clive did a teardown of one that has an unmarked capacitor that could perhaps be used for power factor correction but it's not connected to anything. Electroboom has a few teardowns as welI. I like the £99.99 scissors, guaranted to work.

author: wraper
author_rank: Unknown
timestamp: November 21, 2023, 11:14:14 pm
content: Quote from: chris_leyson on November 21, 2023, 10:43:22 pmFor power correction of inductive loads only, of which you may find some kitchen appliances with motors, maybe some fans. Not that residential premises are charged for the power factor to begin with.

author: newbrain
author_rank: Super Contributor
timestamp: November 23, 2023, 11:23:43 am
content: I mean, you are really telling me that you do not trust "The founders of this powerful new device"?EtA: How do you "found" a device, BTW? I'm dumb-founded.

author: tszaboo
author_rank: Super Contributor
timestamp: November 23, 2023, 05:15:33 pm
content: Only in America can someone have 6000 dollar yearly power bill and don't question life choices.
Oh look, yet another plasma frequency thing to heal you. LOL - Page 1
Forum section: electronics / general

author: Ben321
author_rank: Frequent Contributor
timestamp: October 23, 2023, 05:24:12 am
content: I found this after a quick search. It's a device called the "Plasma generator RPZ 14". And the company that makes it is selling it for $6000. I'm not joking.https://refanalahealth.com/product/plasma-generator-rpz-14/Here's a link to a picture of the device.https://refanalahealth.com/wp-content/uploads/2016/12/plasma-generator-shop.jpg

author: BrokenYugo
author_rank: Super Contributor
timestamp: October 23, 2023, 02:14:38 pm
content: You'd think a $6000 Geissler tube would come with a nicer looking stand/driver, and tube for that matter.

author: temperance
author_rank: Super Contributor
timestamp: October 23, 2023, 02:58:38 pm
content: Interesting, I will post on some audionutter board that it also makes the bass cleaner and vocals sound like never before. But before doing so I will first prepare a webpage where such a thing with a custom label will cost 15K, the mains cable not included. For the mains cable I will refer to a partner selling mains cables for 1K.More interesting is the home page. On the bottom of the page is a map and the company seems to be located next to a restaurant called Hell's kitchen.

author: Zenith
author_rank: Frequent Contributor
timestamp: October 23, 2023, 03:08:32 pm
content: Quote from: Ben321 on October 23, 2023, 05:24:12 amWell, you can expect to pay for quality. And it's based on research by Nikola Tesla, no less, so it must be good.

author: RJSV
author_rank: Super Contributor
timestamp: October 23, 2023, 08:16:17 pm
content: They keep saying, talking about mysterious 'bad frequencies' (entering the body, etc.). But 'they' never say which frequencies are the baddies...I'd maybe, like to see a DICTIONARY, of these 'healing' things. Plasma- Miasma

author: Ben321
author_rank: Frequent Contributor
timestamp: October 24, 2023, 09:44:57 pm
content: Quote from: BrokenYugo on October 23, 2023, 02:14:38 pmYeah. I'm pretty sure the whole thing is just a scam, with absolutely no health benefits at all.

author: Kim Christensen
author_rank: Super Contributor
timestamp: October 25, 2023, 02:33:32 am
content: Well, the lady in the video did say it cured HPV and herpes.
Sidewalk generators  - Page 1
Forum section: electronics / general

author: JMcLaren
author_rank: Newbie
timestamp: July 24, 2023, 08:50:58 pm
content: Hum...https://www.pavegen.com/

author: SiliconWizard
author_rank: Super Contributor
timestamp: July 24, 2023, 08:55:41 pm
content: It's going to save the planet.

author: Brumby
author_rank: Unknown
timestamp: July 28, 2023, 01:53:24 pm
content: Basic physics says that it will harvest energy by extracting it from movement.This means that every step a person takes will have part of the energy they have used to propel themselves along absorbed by the panels. In short, you will have to put more effort into walking a given distance than if you were walking on solid surfaces, such as concrete.Anybody using wheeled mechanisms will really love this - and I'm thinking delivery people with their trolleys and those in wheelchairs.Of course, you could scale back the level of energy extraction, so that it has less impact, but then that rather defeats the objective.I'm all for it being given a red hot go ... and just wait for the feedback of those who traverse it - especially those that do so frequently.

author: mendip_discovery
author_rank: Super Contributor
timestamp: September 17, 2023, 10:08:37 am
content: They have been working on this for a good 20 years or so. I remember tales of the British Army looking at it as they walked a lot and were thinking of ways to power devices such as the weapons-grade phone known as the 32 20.I can only guess that each of these startups gets a certain amount of money and that is enough for them to survive for a year or so, and then they look for the next idea. "I have a Great Idea, I will do X", "Shut up Dave, we did X 5 years ago", "Yes but this is totally different, now we have a new term to use with it that totally changes it". It is like Pinky and the Brain.

author: Stray Electron
author_rank: Super Contributor
timestamp: September 17, 2023, 01:52:06 pm
content: Quote from: SiliconWizard on July 24, 2023, 08:55:41 pmWhat makes anyone think that people are going to walk anywhere as long as they have cars, buses, trolleys, etc? If people had to walk everywhere they went then we probably wouldn't have an energy shortage to start with.I can just see it now, everyone walking and everyone pushing a perambulator full of batteries and an electric generator!

author: Bud
author_rank: Super Contributor
timestamp: September 18, 2023, 11:23:18 pm
content: QuoteWhat?

author: Circlotron
author_rank: Super Contributor
timestamp: September 19, 2023, 12:46:25 am
content: Maybe they should install it on a basketball court.

author: AlienRelics
author_rank: Unknown
timestamp: October 18, 2023, 05:32:16 pm
content: Wait a minute. Did you create my universe? Is my universe a miniverse?
Acme Portable Cell Phone Signal Amplifier - Page 1
Forum section: electronics / general

author: jhoffman
author_rank: Contributor
timestamp: July 19, 2023, 08:16:22 am
content: Warning: Place a dry towel between the legs before reading further because your going to get wet between the legs from all the excitement.1pc Portable Cell Phone Signal Stickers Phone Signal Enhancement SP4 Network Signal Amplifier Signal SP4 Enhancement Stickerhttp://www.aliexpress.com/item/1005003389351638.html207 Sold !!!Feedback from Russia: "Improved the signal by one division. Will order more"

author: Halcyon
author_rank: Unknown
timestamp: July 23, 2023, 03:02:46 am
content: Moving this to dodgy technology where it belongs, however devices like this (if properly designed) aren't entirely useless.External car antennas for example that aren't electrically connected to phones. Or you could do what they do in outback Australia:

author: AVGresponding
author_rank: Super Contributor
timestamp: July 23, 2023, 07:44:38 am
content: Quote from: jhoffman on July 19, 2023, 08:16:22 amDoes this mean that I have to worry about Putin sending tanks to my location..?

author: xrunner
author_rank: Super Contributor
timestamp: July 26, 2023, 12:20:49 am
content: Wait now - every product has an upside ... oh yea, you can see it printed on the thing.

author: RJSV
author_rank: Super Contributor
timestamp: September 24, 2023, 02:01:11 am
content: Needing THIS passive method...is that under any sort of PATENT authority ?I need a simple WIFI extension, getting approx. 15 meters from server, max range!The ideal aspect, in this passive device, is that it can naturally re-transmit passively, all using same frequency band.Haven't seen or thought about the possibility, of no worries about signal feedback etc.
Google the driving force behind dimming overlays. - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: July 29, 2023, 01:50:37 am
content: bI wonder if this was just a natural thing for developers to clumsily slip things in with little though for discomfort and then I found this article:https://m2.material.io/components/dialogs/android#full-screen-dialogI tend to get very angry and upset, when a dialogue appears, hides the scrollbars and suddenly darkens large parts of my screen hurting my eyes by dimming the background thereby cutting me off which is when on webpages I try the javascript button if I can't do it with Adblock. I find it horrible behaviour.QuoteNo I don't want to be cut off from background and the sudden shift with no considering for vision.Reminds me just like what malware use to do around 2010 injected from hidden stuff or banners when I went round removing them.Used sparingly? Rubbish. I have seen it used excessively and seems to be getting worse.Android:This is the sort of thing that puts me off new phones.What good is that suppose to do? Looks very stupid to me as well.My old Samsung J5 has one with the brightness (very stupid when trying to adjust) and that's it I think. Well just checked and it is in many other places which is why I barely use it for much. The Sony XA2 given to me seemed to have a lot of that crap and quite a few when I installed Lineage which is why I don't often use it.I wonder if these developers or people who direct this stuff subject themselves to it.QuoteLike that is a good excuse to cut them off from the background... or maybe they are stupid and confused and can't focus and concentrate.So they call this intrusive, spammy, eye hurting behaviour a practice:QuoteBy dictating to the user when the contents are shown.What if I don't want it to dim ever?I find the behaviour and attitude absolutely stinks.This where again I think they not only think the users is stupid but are effectively calling them stupid that they need the background covered up so they can concentrate on the dialogues and sod the user if the excessive amount affects their vision.What do you think?

author: RJSV
author_rank: Super Contributor
timestamp: October 06, 2023, 02:05:05 am
content: It's only natural behavior. That's why all the fuss, as originally intended, to have fair and effective MONOPOLY controls..They call it 'Antitrust' which is a legal term.Consumers get damage, plus very little recourse. (It's at THIS point I tend to insert sarcasm, it's the 'no recourse' part).Independent developers tend to get cheated as well, outweighed by two (or less) actual competition.