hybridfree/eevblog-posts huggingface dataset:
Inflation: Have components rocketed in price? - Page 1
Forum section: electronics / general

author: NivagSwerdna
author_rank: Super Contributor
timestamp: April 03, 2020, 04:16:07 pm
content: So I need a 16MHz XTAL and I thought I would just use the same part I used a few years back...It's E3SB16.0000F09G11AE which I bought from Farnell as Order Code 246744...I bought 20x of these on 30 Aug 2016.... at 21.4p each...I checked today.... they are 102p in similar quantities!!!! And it's not like they are rare... they have >4k in stock.Shocking!

author: ajb
author_rank: Super Contributor
timestamp: April 03, 2020, 04:24:06 pm
content: Inflation is a broad economic phenomenon, the price of a single component is not a good indicator for it. A lot can change in a few years. Look at what's happened with capacitors, manufacturers are shifting to product lines that are more profitable, leaving less supply of basic commodity parts, so prices jump until the market settles back down. Getting into the game of making components is hideously expensive and it takes while to get started, and shifting production focus isn't much faster or cheaper, so because there's little elasticity in the supply the market has to react to changing supply and the price changes. 4k is nothing in terms of quantity.

author: NivagSwerdna
author_rank: Super Contributor
timestamp: April 03, 2020, 05:04:28 pm
content: Quote from: ajb on April 03, 2020, 04:24:06 pmThat's fair. Maybe they are EOL.

author: thm_w
author_rank: Super Contributor
timestamp: April 03, 2020, 08:16:15 pm
content: Search for compatible parts and then see if their prices are high as well or not.It seems to be a common size (3.2x2.5mm) so you can just find something compatible and use that, eghttps://www.digikey.ca/product-detail/en/epson/TSX-3225-16-0000MF18X-AC0/SER4070TR-ND/5260855That part is a fairly specific crystal for the "CSR chipset" as they don't even provide stability specifications in the datasheet:http://www.aelcrystals.co.uk/DocumentHandler/125896but appears to be <25ppm.

author: Siwastaja
author_rank: Super Contributor
timestamp: April 03, 2020, 09:15:29 pm
content: Component prices at the distributors are completely random, even in qty 1000 or so. They go up and down and follow no logical connection to the actual manufacturer price. Sometimes the distributor adds 50% margin, sometimes 1000%.In general, not only for price but availability as well, try to use as many parts with secondary sources (different manufacturers) as possible (i.e., ones with a compatible footprint) - do that at the design time, not as an afterthought.

author: NivagSwerdna
author_rank: Super Contributor
timestamp: April 03, 2020, 10:12:38 pm
content: Indeed there are equivs not far off what I paid 4y ago. That will make me think twice before just reordering!
My latest Oldest Radio!!. Crosley Model-51 - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: April 02, 2020, 11:57:13 am
content: My father had a Crosley model 51 & 52 many years ago. (The '52' had one extra Valve Audio stage). Unfortunately, they were 'Disposed of', (stolen!) after I moved from my original house... Sigh. I've always wanted to find another, (quite rare here!), and do it up to like brand new condition & have it fully working, in honor of/for my father. Have now just bought one!! Here's a view inside the top......It is a 'Regenerative Receiver', with feedback to a mechanically adjustable coil, (seen in the photo), in front of the main coil. It has quite a simplistic (though typical of the day), Grid-Leak resistor, typically around 2-Meg, mounted on top of the filtering Capacitor, connected to the Grid.P.S. I always LOVED the old style 'Book-Capacitor' underneath the GridLeak/RF-block Capacitor!!I was 'tickled' though, (and originally confused!), when reading online about a "Grid-Leak-Drip-Pan" that one company made years ago, which hung under the 'Grid-Leak' Resistor!!! (to catch the 'leakage'). It's a NOVELTY just for fun,but I WANT ONE!!

author: TimFox
author_rank: Super Contributor
timestamp: April 02, 2020, 03:29:34 pm
content: What are the two tube part numbers?

author: GlennSprigg
author_rank: Super Contributor
timestamp: April 03, 2020, 04:33:15 am
content: Quote from: TimFox on April 02, 2020, 03:29:34 pmThey are both 4-pin UV 201A Triode tubes. According to the detailed manual which I have with schematics, there are other tube variants that can be used, depending on the type of batteries, (A, B, C), and their configurations. I'll be making my own multi power supply unit!!
IEEE makes access to COVID-19 related publications free - Page 1
Forum section: electronics / general

author: graybeard
author_rank: Frequent Contributor
timestamp: April 01, 2020, 08:58:44 pm
content: The IEEE has made access to their library of COVID-19 related publications free to all.IEEE library of COVID-19 related publications

author: Ruediger
author_rank: Newbie
timestamp: April 02, 2020, 11:08:32 am
content: Most corona papers on PubMed are also freehttps://www.ncbi.nlm.nih.gov/pubmed/orhttps://pubmed.ncbi.nlm.nih.gov/
Auxiliary Engineering Support for field hospitals (UK) - Page 1
Forum section: electronics / general

author: Chris Jones
author_rank: Regular Contributor
timestamp: April 02, 2020, 10:37:02 am
content: There was a request for volunteer engineers to fix medical equipment in the UK.Here is the job description:https://www.raeng.org.uk/publications/other/auxiliary-engineering-support-job-descriptionSince I last looked, it seems like that round of applications has closed but there will be more:https://www.raeng.org.uk/policy/engineering-response-to-covid-19/active-government-calls

author: Chris Jones
author_rank: Regular Contributor
timestamp: April 02, 2020, 10:45:58 am
content: https://www.imeche.org/news/news-article/more-than-600-engineers-volunteer-to-support-nhs-field-hospitals-in-one-day
Ted Yapo - Towards an Open-Source Multi-GHz Sampling Oscilloscope - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: November 18, 2019, 08:00:30 pm
content: Ted Yapo - Towards an Open-Source Multi-GHz Sampling OscilloscopeInteresting Hackaday conference video.

author: KE5FX
author_rank: Super Contributor
timestamp: April 06, 2020, 04:46:09 am
content: Just watched this presentation. Wow, it deservedwaymore attention than it got here, which (after ~6 months) was none. Go watch it.
Face shield design. Does someone know someone at Ford? - Page 1
Forum section: electronics / general

author: Blitzschnitzel
author_rank: Regular Contributor
timestamp: March 31, 2020, 09:36:07 am
content: Hi, so I saw the news that ford is making face shields:https://www.wired.com/story/tinkerers-created-face-shield-being-used-hospitals/Apparently, they are gluing and stapling those by hand. I made a stamping design which you can assemble in the field in seconds. And the big advantage is that you can send them flat pack with an equal number of headbands in the box. You could send these out as fast as you can stamp them. Does someone know the right contact path to get the idea to Ford? Art supplies are closed due to Corona so I can’t make a transparent version.

author: Blitzschnitzel
author_rank: Regular Contributor
timestamp: March 31, 2020, 01:52:03 pm
content: All good. I got the right person on the phone.
Quality of old Chinese Valves/Tubes is High!!? - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: March 27, 2020, 11:35:57 am
content: I unashamedly love all of "Mr. Carlson's" videos. (No-one speaks clearer).Anyway, in one of his old posts, be was repairing an old but well known Guitar Amplifier, and replaced a 1st stage Tube. (Intermittent internal short from the heater filament to the surrounding cathode). He talked a bit about the extreme vibrations inside the amp, due to the large internal speakers, that literally shake the shit out of the valves/tubes.He said though, that he would normally love to use tubes labelled as "Made in USA", but they are not as strong internally. Although a lot of 'modern' stuff from China may be cheap & nasty, he says that back in the days of Tube production, their manufacture of such copies were much more internally robust, and were built to last!!

author: jxjbsd
author_rank: Regular Contributor
timestamp: March 27, 2020, 01:26:03 pm
content: Generally speaking, the quality of electronic tubes produced in China in the 1960s-1980s is very stable.These electronic tubes are not of very high quality, but there is no problem in normal use.

author: GlennSprigg
author_rank: Super Contributor
timestamp: March 27, 2020, 02:02:21 pm
content: Thanks. Yea, he said he would not argue about 'Audiophile' quality, as it's alwaysin the 'ears' of the beholder...

author: GlennSprigg
author_rank: Super Contributor
timestamp: March 27, 2020, 02:23:01 pm
content: Just to add to that??...What IS it that certain 'Audiophiles' try to explain about Quality?? It's a physical mechanical device with plates and a vacuum. Is it about the actual mechanical design/shape etc of the plates/parts within?? I can't get my head around that...

author: jxjbsd
author_rank: Regular Contributor
timestamp: March 27, 2020, 03:03:49 pm
content: I belong to one of them 。but，I can't fully understand the behavior of these people.In my opinion, the main differences of electronic tubes are: 1 material, 2 electrode mechanical accuracy, 3 vacuum degreeHigh quality electronic tubes are usually produced by these companies: GEC，MULLARD STC Mazda、Brimar ，Telefunken Valvo From Britain and Germany ，and PHILIPS .

author: GlennSprigg
author_rank: Super Contributor
timestamp: March 29, 2020, 01:19:39 pm
content: Ok. However one aspect really confuses me. If physical design/shapes of plates etc is so important, what about the difference between directly & indirectly heated Cathodes?? Indirectly heated ones have a smooth geometric shape, but directly heated ones are just a spiraled heater element coil? I would have thought the latter would be be more 'dirty' noise/quality wise?
Any idea what type of antenna is this? - Page 1
Forum section: electronics / general

author: sam1000islands
author_rank: Newbie
timestamp: March 30, 2020, 12:00:01 am
content: Any idea what type of antenna this is?

author: Brumby
author_rank: Unknown
timestamp: March 30, 2020, 12:23:33 am
content: For me, the first thought that comes to mind is a weatherproof, aerodynamic antenna you might find on top of a caravan.

author: 0culus
author_rank: Super Contributor
timestamp: March 30, 2020, 12:25:33 am
content: Might be an antenna for a wireless ISP. OP, you might get more traction in the RF forum. You should be able to move your own topic.
X-Y-Oscilloscope-Tracer, for Cat lovers!! - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: March 27, 2020, 11:15:15 am
content: We've all played with a Scopes XY tracer settings for testing components.This guy takes it to a new level, when outputting signals from his pc/laptopusing an array of specialized software. (Will see where the 'cat' comes in!)Maybe this can be repurposed for something practical ??....

author: SiliconWizard
author_rank: Super Contributor
timestamp: March 27, 2020, 04:01:33 pm
content: Not to rain on your parade, but using XY mode of scopes to display all kinds of stuff is nothing new really. There are many fun demos out there, and the obligatory clock. Like this:http://tuxgraphics.org/electronics/scopeclock/oscilloscope_clock.shtmlRegarding how to proceed, it's a lot like the old vector displays worked too.https://en.wikipedia.org/wiki/Vector_monitor

author: Cyberdragon
author_rank: Super Contributor
timestamp: March 27, 2020, 05:08:51 pm
content: The most advanced thing people have done with vector mode is oscilloscope music, and that's been out for years now.

author: GlennSprigg
author_rank: Super Contributor
timestamp: March 29, 2020, 01:09:35 pm
content: Quote from: SiliconWizard on March 27, 2020, 04:01:33 pmYou're not raining on my paradeThat aspect of electronics is not in my league/branch !!BTW The 'clock' is amazing!
A history of James Clark Maxwell - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: March 25, 2020, 04:50:08 pm
content: https://youtu.be/NuWEqE4k230

author: bsfeechannel
author_rank: Super Contributor
timestamp: March 25, 2020, 05:19:19 pm
content: I think that his name is James Clerk Maxwell.

author: Simon_RL
author_rank: Regular Contributor
timestamp: March 25, 2020, 06:38:54 pm
content: Quote from: G7PSK on March 25, 2020, 04:50:08 pmThanks for posting G7PSK.

author: TimFox
author_rank: Super Contributor
timestamp: March 25, 2020, 07:17:14 pm
content: Quote from: bsfeechannel on March 25, 2020, 05:19:19 pmYes, but it is pronounced “Clark”.

author: bob91343
author_rank: Super Contributor
timestamp: March 25, 2020, 09:52:45 pm
content: The narrator mispronounces Clerk. His enunciation sucks and I could only guess at much of what he was saying.

author: TimFox
author_rank: Super Contributor
timestamp: March 25, 2020, 09:59:39 pm
content: I did not check out the video, but the correct pronunciation of his name is "Clark" even though it is spelled "Clerk".cf.https://www.physicsforums.com/threads/james-clerk-clark-maxwell.432602/

author: aneevuser
author_rank: Frequent Contributor
timestamp: March 28, 2020, 10:20:19 pm
content: Those interested in Maxwell may find this old and very comprehensive biography of interest:https://archive.org/details/lifeofjamesclerk00camprich/mode/2up

author: babysitter
author_rank: Frequent Contributor
timestamp: March 29, 2020, 12:07:07 am
content: Written>Video. Thanks!
Xerox still trying to acquire HP - Page 1
Forum section: electronics / general

author: joeqsmith
author_rank: Super Contributor
timestamp: March 28, 2020, 03:14:52 pm
content: It's been in the works for a while. If they manage to pull it off, will they sell the HP name to Keysight, so the T&M group can finally get their historical name back? Will they care? Will the public care?https://www.reuters.com/article/us-hp-m-a-xerox-hlngs-idUSKBN20E2XZ
Electric magnet/inductor/motor/transformer enamle coated wire cleaning tool... - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: March 28, 2020, 06:17:47 am
content: OMG, this thing actually exists, but, I don't know where I can buy one... This would clean up soldering to transformer wire SOOO much cleaner!Take a look at the tool here:https://youtu.be/bsS_7EEYx1Y?t=1390Can someone point me to a place where this device may be purchased...

author: tautech
author_rank: Super Contributor
timestamp: March 28, 2020, 07:57:46 am
content: Nice vid.Solder pot ?

author: mzzj
author_rank: Super Contributor
timestamp: March 28, 2020, 08:01:07 am
content: https://www.aliexpress.com/item/1340148658.html?spm=a2g0o.productlist.0.0.61f420dcmzLo5Q&algo_pvid=f9433d97-347b-40f1-9777-ce74d2be135c&algo_expid=f9433d97-347b-40f1-9777-ce74d2be135c-24&btsid=0ab6f81e15853823753954582e3249&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

author: BrianHG
author_rank: Super Contributor
timestamp: March 28, 2020, 08:03:12 am
content: Quote from: tautech on March 28, 2020, 07:57:46 amYes, a solder pot is what I use now, but the enamel leaves a gooey residue and smell when being burnt away.That electric drill/cleaner type tool would make my end connections clean / I would not need to do additional cleaning afterward to make the wire ends look presentable.Also, I wouldn't have to warm up a solder pot as my soldering is usually only 2-3 conductors only.

author: BrianHG
author_rank: Super Contributor
timestamp: March 28, 2020, 08:03:52 am
content: Quote from: mzzj on March 28, 2020, 08:01:07 am

author: maginnovision
author_rank: Super Contributor
timestamp: March 28, 2020, 08:05:19 am
content: https://www.amazon.com/dp/B075TWDLG2/ref=cm_sw_r_apa_i_HuWFEbCWTN0H7
What the blazes is this thing? - Page 1
Forum section: electronics / general

author: nighthawke
author_rank: Newbie
timestamp: March 28, 2020, 12:06:09 am
content: https://i.redd.it/qhrg2mjrb8p41.pngAccording to OP, it was dropped by a package thief on his way out after stealing someone's box.https://www.reddit.com/r/whatisthisthing/comments/fpyb68/package_thief_dropped_this_after_stealing_my/No idea what this thing is. Its battery powered and it lights up. Doesn't make noise but one of the settings is "mute". Not sure if it was something he used to check if the package had electronics in it?There are no external input or outputs for cables.Its about 3-4 inches long and about 2 inches wide.I tried to google "small device with lights", "device to test packaging" and a few other variations on that.The 3 LED lights cycle through colors when it starts up. Seems like the lights light up when I tap it or move it so it mush be some sort of movement sensor.

author: Muttley Snickers
author_rank: Unknown
timestamp: March 28, 2020, 12:27:30 am
content: I built a similar gadget years ago but it was a remote control motorcycle alarm, the tilt sensor would trigger the audible alarm if the bike was taken off the stand and moved to the vertical position.
Hack Challenge: Can you hack a CPAP or BiPAP machine into a ventilator? - Page 1
Forum section: electronics / general

author: pipe2null
author_rank: Regular Contributor
timestamp: March 27, 2020, 09:25:46 pm
content: I have relatives who think that because I am adept at using a keyboard and mouse, and happen to have a 3d printer, that I might be able to figure out how to adapt existing breathing assistance machines, given the massive shortages of the beefier ventilators. I would not even know where to begin. But I thought it was an interesting idea to pose to a forum of engineers who are likely stuck at home, and others who might want to take their mind off of recent job losses, etc. Perhaps it is not feasible to hack these devices sufficiently, but it's at least food for thought.For a rough idea of (non-hacked and unmodified) CPAP/BiPAP issues AFA COVID-19 for non-medical people like myself:https://www.quora.com/Can-a-CPAP-or-BiPAP-machine-be-used-as-an-adequate-substitute-for-a-ventilator-if-the-spread-of-the-novel-coronavirus-creates-a-shortage-of-ventilators?share=1

author: NiHaoMike
author_rank: Super Contributor
timestamp: March 27, 2020, 10:13:54 pm
content: https://www.postbulletin.com/life/health/not-so-fast-using-cpaps-in-place-of-ventilators-they/article_50a0ecba-706f-11ea-851c-3b261de43ced.htmlIf the main problem is that they're not built to contain the virus, I think the fix would be to hook those up to a central vacuum system to prevent the contaminated air escaping into the room (probably easier said than done), then send the air through some electric arcs to decontaminate it (with UV and ozone) before exhausting it outdoors.
(Tongue in cheek), If Ann Landers was alive and writing today.... - Page 1
Forum section: electronics / general

author: Ducttape
author_rank: Regular Contributor
timestamp: March 27, 2020, 08:30:05 pm
content: How might she weigh in on how men could behave gallantly in these infectious times?For instance, I remember learning as a kid that the man should walk on the street side of the sidewalk, ostensibly so the woman could enjoy somewhat greater safety from an errant vehicle. This might be updated today to specify that the man should walk downwind of the woman, to lessen potential exposure to her of any airborn covid-19 he might be emitting, while somewhat increasing his own risk. How else can men be manly in these trying times?I did mention this is in good fun, right?
COVID-19 won’t kill you - it’s the underlying conditions. - Page 1
Forum section: electronics / general

author: SL4P
author_rank: Super Contributor
timestamp: March 26, 2020, 10:18:07 pm
content: COVID-19 won’t kill you, it’s the underlying conditions that might get you.Pre-existing conditions, weaknesses, or susceptibility to problems like pneumonia are the killers.Particularly lung and upper respiratory conditions, so it’s probably too late, but quitting the fags for next time may save your life.Good luck, and stay safe.What we need to do is manage the infections to not overwhelm the health system.We can’t STOP CV-19, we can only slow it down to spread the burden.Hopefully everyone remaining will develop antibodies to fight re-infection until the next mutation of CV comes along.

author: NiHaoMike
author_rank: Super Contributor
timestamp: March 27, 2020, 12:40:35 am
content: Not just smoking is bad, air pollution in general is bad.https://airqualitynews.com/2020/03/19/exposure-to-air-pollution-increases-risk-of-dying-from-covid-19-doctors-warn/It would be interesting to see if the younger patients who have/had particularly bad cases have been exposed to more than average pollution.

author: SL4P
author_rank: Super Contributor
timestamp: March 27, 2020, 01:22:00 am
content: Asthma is a significant risk too.Upper respiratory and lung conditions seem to be over-represented, so please be careful for your family & community.

author: EEVblog
author_rank: Unknown
timestamp: March 27, 2020, 01:31:00 am
content: We don't need yet another virus thread. Locked.
What info is in patent filing for chips ? - Page 1
Forum section: electronics / general

author: MathWizard
author_rank: Super Contributor
timestamp: March 28, 2020, 06:36:38 am
content: For instance I'm searching a 10yo sound card processor, I'd be happy to find what the official input voltage is (I know what drives it tho). So is that publicly available in some patent filing ? Don't they have to release some basic electrical characteristic's in some public doc. or something? What about when they get certified for EMI and safety ?IDK jack about legalize and patents, but some video I watched just lately mentioned getting good info from something publicly available. I've heard of patent searches. How's that work for electronics ?

author: magic
author_rank: Super Contributor
timestamp: March 28, 2020, 07:03:35 am
content: No, if you don't have the datasheet you are SOL.There is not even such thing as "patenting a chip", before you jump to assume that blueskull's post implies you can find schematics of any chip on the Internet. At best, you may find patents describing some circuits inside or technological solutions employed to produce the chip, stuff like that. And they won't even be marked as referring to your chip specifically, but described in general terms like "a method of doing X with Y".

author: MathWizard
author_rank: Super Contributor
timestamp: March 28, 2020, 07:47:01 am
content: What about FCC stuff (federal com.com) This reminds me of some sort of RF TX/RX I salvaged, and I did find a bunch of info on the machine, from a testing authority. But yeah, right not the chips themselves, but a bunch on the digital side.Ok I was watching something on hardware hacking and he was talking about what you can learn about a whole machine, like a modem or appliance. Probably about JTAG and machine protocol that has to be published, that type of stuff.But I know it's not the old days when schematic's were available.
the new Apple iPad 2020 has a built-in Lidar: how does it work? - Page 1
Forum section: electronics / general

author: 0db
author_rank: Frequent Contributor
timestamp: March 23, 2020, 10:01:40 am
content: Yesterday Apple announced the new iPad 2020. And I was surprised to see it has a built-in Lidar.I only know mechanical Lidars with a rotating sensor, while the Lidar mounted on the iPad is a solid-state device ... how does it work? How can it scan 180 degrees without a rotating sensor?

author: SiliconWizard
author_rank: Super Contributor
timestamp: March 23, 2020, 03:23:02 pm
content: It's probably LED-based, and from what I got, is not meant to work at 360°. Probably just a relatively narrow angle in front of the device, but enough to give more information than the usual distance sensors that are used in mobile phones and tablets.Probably something similar to this:https://orbitica.com/cameras/garmin-lidar-lite-v4.html

author: NiHaoMike
author_rank: Super Contributor
timestamp: March 24, 2020, 02:24:24 am
content: The second generation Kinect is a LIDAR as well.
Time compressed restoration of a Dynaco ST70 Amplifier - Page 1
Forum section: electronics / general

author: jcrubin
author_rank: Frequent Contributor
timestamp: March 22, 2020, 02:22:53 pm
content: Here is the non-technical artistic version of the ST-70 amplifier restoration video for all to enjoy edited from the several full length videos that made up the original restoration. I make several of such videos a year for larger projects.

author: Cubdriver
author_rank: Unknown
timestamp: March 23, 2020, 02:43:06 am
content: Nicely done!-Pat

author: jcrubin
author_rank: Frequent Contributor
timestamp: March 23, 2020, 12:49:12 pm
content: Quote from: Cubdriver on March 23, 2020, 02:43:06 amThank you!
Away a while - Page 1
Forum section: electronics / general

author: Inverted18650
author_rank: Frequent Contributor
timestamp: March 22, 2020, 03:02:49 am
content: Greetings and Salutations to All,First:Thanks to all who sent cards, notes, letters. I received them all.Much Love & Respect to you all."Your ACTIONS speak so LOUD that I cannot HEAR what you are SAYING." - Mike Ritland, U.S. Navy SEALSecond:I've changed my mind about what I am doing to do with the rest of my life.The reality is life is shorter than we think."Find something you love to do, then find someone to pay to do it." - AnonymousThird:I own "TestGearAddicts.com & .net" and will GIVE the domain to any T.E.A. gal/guy, that I spoke with here, that wants it.Its paid up for 5 years (at the time, probably 3.5'ish now, through GoDaddy).Once I transfer the rights, do whatever you want with it.Lastly:Much Love to Dave, his family, and all of the EEVBlog Crew and members."Don't turn it on, take it apart" - Dave Jones

author: Vgkid
author_rank: Super Contributor
timestamp: March 22, 2020, 06:38:43 am
content: Glad to hear back , I haven't seen you on here in a while.

author: syau
author_rank: Frequent Contributor
timestamp: March 22, 2020, 09:58:57 am
content: Missed you. Be healthyYour friend in far east.

author: mnementh
author_rank: Super Contributor
timestamp: March 22, 2020, 02:41:17 pm
content: Namaste', my friend.mnem*casts a prayer to Ifni for all our lost souls*

author: bitseeker
author_rank: Super Contributor
timestamp: March 22, 2020, 09:23:34 pm
content: Great to hear from you, inverted18650. Glad you got our card. Hope you're doing ok. All the best on your new endeavors and hope to see you again. We have a Discord chat every Saturday. Details in the first post of the TEA thread.
Rotary Encoder - Page 1
Forum section: electronics / general

author: larrybl
author_rank: Regular Contributor
timestamp: March 19, 2020, 06:58:43 pm
content: This popped up as an internet ad. I am pretty sure this is not, but I thought it funny.

author: ajb
author_rank: Super Contributor
timestamp: March 21, 2020, 03:30:34 am
content: Someone was lazy and just keyword searched for stock imagery.Honestly not a surprise after the test treatment we got from what we thought was an accomplished marketing firm recently.
Photonic induction - any update? - Page 1
Forum section: electronics / general

author: owen_a
author_rank: Newbie
timestamp: March 17, 2020, 08:12:37 pm
content: Hi all,I've just been searching through my YouTube subscribers and I came across Photonic Induction again. I used to enjoy watching his videos back when I was studying Electrical Engineering and apparently it was two years ago his last video was released. I know he found a new love in India and apparently his new wife has joined him in the UK, but does anyone know if he has any plans to make videos again?I saw a post on here from January 2019 saying he hopes to make videos again soon, but it's now March 2020 and still nothing.Just thought I'd ask in case anyone else might be wondering the same thing too and if anyone who knows him personally or knows anything at all it'd be nice to know what his goals are (if any) is for YouTube.Thanks,Owen

author: Zero999
author_rank: Super Contributor
timestamp: March 19, 2020, 10:44:56 am
content: Strangely enough I was thinking the same thing th other day. I assumed he quit YouTube and won't be back.

author: TERRA Operative
author_rank: Super Contributor
timestamp: March 19, 2020, 11:40:59 am
content: He seemed to have been starting down the free energy path last time I saw an update from him.I remember him claiming that he could get support in india to fund his idea that couldn't be found in the UK or something similar.I would like to see him back with his usual high voltage and high power antics, but I'm not holding out much hope for him to come back anytime soon.

author: Zero999
author_rank: Super Contributor
timestamp: March 19, 2020, 11:50:28 am
content: Quote from: TERRA Operative on March 19, 2020, 11:40:59 amYes, I remember that, but I didn't take it seriously. I know he was very depressed at the time, so put it down to that. I hope he's better now.
Helping projects around Corona Virus - Page 1
Forum section: electronics / general

author: BU508A
author_rank: Super Contributor
timestamp: March 18, 2020, 03:34:19 pm
content: Hello,I was informed about the so-called open air project where people want to develop parts for open source ventilation for infected people.It was started in Portugal, this is the link to Twitter, where it has been announced:https://twitter.com/hashtag/projectopenair?src=hashtag_clickQuote:We are working on open source ventilators in order to have a fast and easy solution to be reproduced and assembled locally worldwide.If you have any skills that you consider might help, join us @https://projectopenair.org#projectopenair please RT and shareEarth globe americasFlexed biceps#TogetherWeRiseLink to the project:https://www.projectopenair.org/If you are aware of similiar projects or if you have an idea how to support sick people, please write here into this thread.I would appreciate, if general discussions wil be held in the more generic thread here:https://www.eevblog.com/forum/chat/covid-19-virus/Thank you and take care.

author: BU508A
author_rank: Super Contributor
timestamp: March 18, 2020, 03:57:41 pm
content: And here is another project, this time in Germany (sorry, the text is also in German):https://wirvsvirushackathon.org/
Poorly designed Industrial Gear (Beijer Electronics RS422 Adapter Cable) - Page 1
Forum section: electronics / general

author: ratdude747
author_rank: Regular Contributor
timestamp: March 17, 2020, 05:35:23 pm
content: Here's my frustration for today... coming from work.Background: I'm an engineer at an automotive component supplier; I don't do a lot discreet electronics work in my position (I mainly deal with PLCs, Robots, automation, and the like), but today was a brief exception.One of our Maitenance techs pulled me aside today because yesterday he managed to roast a couple of PLC serial cables (RS422 to RS232 adapters used for old Misubishi PLCs). Took the one what was confirmed to be dead back to my desk and did some reverse engineering, with the hopes of deriving a pinout so I could test the PLC for a power supply issue on the programming port.While I was able to derive such, and determine that while the 5V supply is a tad high (5.12V),allof our PLCs that use such are also reading 5.11-5.12V. Not a PLC issue, at least not one that's active at the moment.What I did find, though, is that these cables we've been using for decades (made by Beijer Electronics), at least the newer one that I tore apart, aren't particularly well designed for the "industrial" build quality/price they're made to. Specifically, they ran the 5V connection from the PLC directly to the three chips with zero protection circuitry. The three chips are a TIMAX202(RS232 Line Driver), and two TISN1579B(Differential pair driver/receiver pair). The former is rated for up to 6V supply, but the latter are only rated for Vcc max of 5.25V. Sure enough, one of those seems to be the fried chip based on such warming up very quickly when powered (the adapter did overheat when it failed, I'm told)Maybe I'm being a bit harsh, but this isn't exactly a "Won Hung Lo" product... the "new" cables are made in china, but the older ones were made in Sweden. I haven't had one of the old ones apart to see if the design is any different. On the new ones (and likely the old ones), they even used genuine (or genuine-looking) TI chips. Spend dollars to use name brand parts, but save cents by running the power supply directly into the chip.Not to say this issue is what killed the cable, but for something built for hard industrial use, such an oversight is a plausible explanation.End Rant.
50% Discount on Microchip ICD4 - Page 1
Forum section: electronics / general

author: mc6800
author_rank: Contributor
timestamp: March 19, 2020, 10:09:44 am
content: I don't know if it is of use to anyone else, but Microchip Direct have a 50% discount coupon on the ICD4, as they have (had?) supply difficulties with the PicKit4.Search for PicKit4 at their website, and this gives the code to use to when you place the order for the ICD4 (you also seem to get free postage).However, it looks as if the website is currently a little flakey (presumably the hamster powering it is slightly unwell at the present).

author: TomS_
author_rank: Frequent Contributor
timestamp: March 21, 2020, 07:16:23 am
content: I kinda want one, but my ICD3 is a work horse and hasnt let me down so far.

author: AlfBaz
author_rank: Super Contributor
timestamp: March 21, 2020, 07:31:48 am
content: The errata sheet was pretty horrendous about 8 months ago, especially considering the price

author: JPortici
author_rank: Super Contributor
timestamp: March 21, 2020, 12:35:40 pm
content: Yeah, i suppose they want to dump the current hardware revision. They did the same thing for PK4 and snap about three months ago for that reason
VK-172 GPS Mouse from China?! - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: November 18, 2017, 02:23:48 pm
content: HiI found a ton of VK-172 on Ebay.The claim to use Ublox7 Chipset. The cheapest i could found is EUR 6,25.Does anyone here have experience with?Is this genuine?ThanksEDIT: Some people pre-fare the older Vk-162 one.

author: rstofer
author_rank: Super Contributor
timestamp: November 18, 2017, 06:12:43 pm
content: According to the description on the US Amazon site, these may not work well indoors. Somehow they expect me to boost the satellite signals (probably not happening) or work out in the yard. Even then, the trees probably block most of the satellites.My cell phone won't get a GPS lock inside the house, I'm pretty sure the dongle won't do any better.

author: Cyberdragon
author_rank: Super Contributor
timestamp: November 18, 2017, 07:24:16 pm
content: It's just a USB GPS, why is it called a "mouse"? A GPS computer mouse would be a terrible idea!

author: Mjolinor
author_rank: Frequent Contributor
timestamp: November 18, 2017, 07:40:28 pm
content: Quote from: Cyberdragon on November 18, 2017, 07:24:16 pmThe mind boggles:Take the next available turning on the left.Take the next available turning on the left.Take the next available turning on the left.Take the next available turning on the left.Do a U turn at the next available opportunity.

author: Lord of nothing
author_rank: Super Contributor
timestamp: November 18, 2017, 09:08:06 pm
content: QuoteI never use something like that.Quotedepend on the construction and Material of the Glas and who is coated with.Quoteoke oke this is a GPS Dongle not a Mouse.QuoteWhy? Mine worked ok.

author: rvalente
author_rank: Frequent Contributor
timestamp: March 30, 2020, 03:16:23 pm
content: Does this device work as a serial adapter? If I plug in and open a terminal, will it send data similar to NMEA protocol?

author: NiHaoMike
author_rank: Super Contributor
timestamp: March 30, 2020, 10:42:48 pm
content: Quote from: Mjolinor on November 18, 2017, 07:40:28 pmNot GPS, but something like this:That said, prior to the availability of affordable smartphones, a GPS receiver and mouse combo would actually be quite good for travel use.
What's up with this? (DS1054Z on ebay) - Page 1
Forum section: electronics / general

author: james_s
author_rank: Super Contributor
timestamp: March 14, 2020, 09:40:44 pm
content: I just happened to come across this shortly before it had ended. It was already bid up to $355 which is $16 more than Tequipment charges for a brand new one, and the seller's feedback rating of 90% positive is the worst I can recall seeing. Private listing too, is something fishy going on? I'm not in the market for a DS1054Z, I just thought this was strange.https://www.ebay.com/itm/Rigol-DS1054Z-Digital-Oscilloscope-Bandwidth-50-MHz-Channels-4/264663976997

author: aargee
author_rank: Frequent Contributor
timestamp: March 14, 2020, 10:30:33 pm
content: That's a typical auction bidding weirdness. This happens all the time, people spending more than RRP for second hand stuff at auctions.

author: james_s
author_rank: Super Contributor
timestamp: March 15, 2020, 12:36:45 am
content: I think the strangest thing is the private listing and the 90% feedback. Normally I'd say 90% positive sounds pretty good but the way ebay calculates their feedback that's abysmal.

author: TK
author_rank: Super Contributor
timestamp: March 15, 2020, 01:04:47 am
content: It seems to be a hacked DS1054Z, maybe people that don't know how to do the hacking themselves...

author: nctnico
author_rank: Super Contributor
timestamp: March 15, 2020, 01:12:16 am
content: Quote from: james_s on March 15, 2020, 12:36:45 amWell it seems that Ebay calculates the feedback rating over the past year so 1 negative feedback on 10 transactions kicks the rating down pretty bad. I checked the rest of the feedback but it looks OK to me. Other than that it seems like a few bidders got into a bidding war over the item. Good for the seller.
Keysight In Neon (Giant Nixie) - Page 1
Forum section: electronics / general

author: Cyberdragon
author_rank: Super Contributor
timestamp: March 13, 2020, 07:06:07 am
content: I wonder what they are going to use it for (office decoration?).NOTE: The captions are not super in depth but there are other videos on making nixies if you want to get super technical.

author: PTR_1275
author_rank: Frequent Contributor
timestamp: March 13, 2020, 10:14:27 am
content: That’s amazing, fantastic work

author: cvanc
author_rank: Frequent Contributor
timestamp: March 13, 2020, 01:45:59 pm
content: Absolutely beautiful!

author: noidea
author_rank: Unknown
timestamp: March 13, 2020, 06:02:33 pm
content: That really is "the art of electronics"

author: Tomorokoshi
author_rank: Super Contributor
timestamp: March 13, 2020, 11:25:12 pm
content: Daniel, you have the best job ever.By the way, what is the Keysight part number for that tube?
iRobot accused of selling products that break safety and government regulations - Page 1
Forum section: electronics / general

author: splin
author_rank: Frequent Contributor
timestamp: March 15, 2020, 08:35:05 pm
content: https://www.theregister.co.uk/2020/03/12/irobot_safety_regulation_wrongful_termination/QuoteI suspect this case is just the tip of the iceberg - not with respect to safety but for products which don't have up to date certfication - ie. products which have been updated either trivially, or rather more substantially, from the one that was originally tested and certified. Something as simple as using an direct equivalent component from a different manufacturer can be enough to change the behaviour of a product such that it no longer complies with emissions limits.Case in point, Dave's microcurrent when an unrequested subsitute opamp converted it from an amplifier based product into an oscillatory, un-intentionally radiating product! In that case the 'change' was spotted and fixed because it affected the performance.Firmware updates can also radically impact emissions, but I bet it's pretty uncommon for products to go through expensive emissions recertification testing every time the FW is revised. Mainly because almost no-one cares, manufacture or customer alike, in the the vast majority of cases, with the exeption perhaps of sensitive areas such as medical products.I particularly recommend reading the comments in the linked article for some more insights. I liked this one:Quote

author: amyk
author_rank: Super Contributor
timestamp: March 15, 2020, 08:51:00 pm
content: I haven't heard anything in the news about their products causing fires or whatever else...

author: splin
author_rank: Frequent Contributor
timestamp: March 15, 2020, 09:23:27 pm
content: Quote from: amyk on March 15, 2020, 08:51:00 pmThey probably didn't:QuoteNot being in compliance with safety requirements doesn't necessarily mean they are dangerous - such requirements almost always have large safety margins for obvious reasons.Judging by the many Youtube videos showing teardowns of cheap power supplies which fall badly short of safety standards, it's a miracle you don't hear of many, many cases of electrocutions or fire incidents. Probably there are many unreported incidents where no-one gets badly hurt.
What questions do you have about PCB Design? - Page 1
Forum section: electronics / general

author: ddavidebor
author_rank: Super Contributor
timestamp: March 12, 2020, 04:13:02 pm
content: Good day to you all beautiful people,I'm writing for an ECAD company.Wanna drop here your questions? Anything related to PCBs, PCB Design engineering, Layout, EMI etc etc.What did you take a long time to figure out?What is hardly ever clear?
Small signal Circuits Book - Page 1
Forum section: electronics / general

author: Dellyjoe
author_rank: Regular Contributor
timestamp: March 10, 2020, 01:58:54 am
content: Good evening everyone !!I have been getting back into transistors and doing a lot of small signal analysis, i'm looking for a book that I can use to have a lot of practical small signal circuits that use transistors.Not sure if there really is any, not finding much of anything, but if you don't know any small signal books, maybe you can recommend a circuit design book. Looking for mostly analog circuit books.Thank you for your time,Joe

author: basinstreetdesign
author_rank: Frequent Contributor
timestamp: March 10, 2020, 04:48:14 am
content: This is the one I used in school:https://vdocuments.mx/communication-circuits-analysis-and-design-clarke-hess.htmlIt seems to be close to what you are asking and it looks like you can download it for free through FB or GGL

author: Dellyjoe
author_rank: Regular Contributor
timestamp: March 11, 2020, 11:00:41 pm
content: Thank you sir, after looking over the book, i think i have alot of learning to do. I started learning about CE,CC,CB amplifiers and I know how to build them but I don't really know what I can use them for. So i think this book will help out a lot.If anyone else has any ideas, I'm also looking for a book that has circuits premade and explanations of why they are used.Going to order this so I can read in my hands. Thank you sir.Joe

author: ferdieCX
author_rank: Regular Contributor
timestamp: March 12, 2020, 12:11:17 am
content: I would recommend "Electronic Devices and Circuits" by Millman and Halkias
Can I Use The Money On MY Google AdSense To advertise my youtube video - Page 1
Forum section: electronics / general

author: nvidia
author_rank: Regular Contributor
timestamp: March 10, 2020, 11:32:34 pm
content: back when i made money off youtube till they changed the rules i was to make money i never put my bank info in so i never got a paymenti have 936 subscribers so i need 64more subs and 4,000 public watch hours to be able to make money againso is it possible to use my AdSense money to buy advertisements for one of my videos?
Ideas for remote lab instructions - Page 1
Forum section: electronics / general

author: maxwell3e10
author_rank: Frequent Contributor
timestamp: March 09, 2020, 03:16:12 pm
content: With universities starting to close due to COVID, I am wondering what activities students can do in place of laboratory classes. Any suggestions for cool phone or computer apps that would let students interact with the physical world? Or maybe simple kits that can be purchased and used without other equipment?In general, typical students these days are much more comfortable with computer simulation and analysis than with real experiments. Lab classes are designed to counteract this tendency, so I don't want to completely loose the hands-on aspect.

author: Kleinstein
author_rank: Super Contributor
timestamp: March 09, 2020, 08:49:21 pm
content: It depends a lot on the level of the students and what topic (electronics, mechanics, acoustics, thermodynamics)Measure some quantities with a limited set of tools available can be fun too. So it would be one step further than the usual pre-build lab experiments: design your own experiment for a given target. It would be discussion first to compare suggested solutions. Than build the maybe 2 different suggstions and compare.An example would be measure the speed of sound with the things they have at hand. The earths gravity is another example relatively easy to do. Another nice little experiment is to measure the heat needed to melt ice. It is nice to remember that number and doing the experiment is a very good way not to forget.
WTF Happened to LBRY.SOCIAL ? - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: March 08, 2020, 11:06:38 pm
content: Video here:https://lbry.tv/@eevblog:7/WTF-LBRY-SOCIAL:0BTW: Big Clive has just joined LBRY:https://lbry.tv/@bigclivedotcom:0dor Youtube:

author: mwarren2
author_rank: Newbie
timestamp: March 09, 2020, 01:21:18 am
content: Hi Dave, I've attached file of cached (7 March) HTML code of the "https://lbry.social/lbrynomics/top-lbry-channels/" . I don't know if it would be of any use to you to try and reconstruct the web site, but here is a text file with the entire HTML code for the site. - Mike - email in attachment
Why do seller on Aliexpress editout or hide Brand marking IC? - Page 1
Forum section: electronics / general

author: RoadRunner
author_rank: Frequent Contributor
timestamp: March 06, 2020, 01:58:23 pm
content: I have been searching for few old NRND parts on AliExpress, I have noticed not just for one part but previously as well Sellers have photo of IC with part number and other details but either edit out Company logo For example if it is a analog device part they will just mask analog device logo.One more thing I noticed that in whole item description they only write part number but not the company name. For example they will never write Analog devices ADxx but instead just ADxxAfter being hit my self, The only reason I can think of is to avoid any claim by the buyer that received part is not genuine "Analog Device ADxx". They can always claim back it ADxx , not Analog device ADxxDoes any body knows specific reason?

author: magic
author_rank: Super Contributor
timestamp: March 07, 2020, 07:46:12 am
content: I opened a "counterfeit item" dispute on Ali two or three times. Most of them went through, but most recently Ali didn't acknowledge my claim "because no branding was displayed by the seller" and changed it to "item not as described" since I listed a few specs that the fake chip didn't meet.Make of it whatever you want, but I'm pretty sure that statistics are collected on disputes and that successful counterfeit claims are something that the sellers and AliExpress themselves particularly don't want to have on their record.I could probably contact support and try to argue that the chip itself was branded, but meh, I took the money and went away.Quote from: blueskull on March 06, 2020, 02:04:32 pmNot sure if that would be legal, but these days little would surprise me coming from 'murricaThat being said, they have been blurring those logos for a few years. Not sure if I started using Ali shortly before or shortly after The Donald took office.