hybridfree/eevblog-posts huggingface dataset:
KA3005P power supply -- RF interference - Page 1
Forum section: electronics / general

author: jimdeane
author_rank: Regular Contributor
timestamp: August 13, 2017, 06:21:45 pm
content: Whoo, I found a limit on the KA3005P power supply. I tried using it to power a 2m 30w amplifier driving an antenna about four feet from the power supply. Key-down produces a Poltergeist-level series of malfunctions in the power supply.I must be sending a lot of RF interference back through the power cables. I guess I'll use a linear supply for that one.

author: bd139
author_rank: Super Contributor
timestamp: August 13, 2017, 06:35:16 pm
content: While the power supply is clearly poo, that PA shouldn't be dumping that amount of noise on the supply. Needs some filtering on the DC in.Edit: it is also a linear supply apparently, just a naff one.

author: Wirehead
author_rank: Regular Contributor
timestamp: August 13, 2017, 07:02:08 pm
content: RF in the shack is hardly "normal" to be honest and should always be avoided. Not really the KA3005P's fault to be honest. Choke the transmission line

author: daqq
author_rank: Super Contributor
timestamp: August 13, 2017, 08:24:13 pm
content: RF nastyness can affect lots of lab power supplies. I remember being mystified by an efficiency going well over 100% when developing a switching power supply that threw interference left and right... apparently the built in meters did not like it and the ammeter in particular was prone do displaying bullshit when interfered with.

author: jimdeane
author_rank: Regular Contributor
timestamp: August 14, 2017, 04:43:00 am
content: I mean linear like regulated but dumb linear. The RF clearly was getting into the control panel and making things very unhappy.I was propping up a Tiny-2 antenna to try and hit a distant repeater. No luck with my HT so I thought I'd put the amp into service. I was already looking askance at the long power cable and thinking they were too antenna-like. Not the supply's fault, it does a perfectly fine job as a bench supply.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: August 14, 2017, 07:32:15 am
content: Yeah, you might want to look into antenna balance.........This one?http://www.rollanet.org/~rrars/tech_files/tiny2.pdfIt doesn't happen to say precisely what the feedpoint is. It does seem to suggest usingunbalanced (50 ohm) coaxto connect to abalanced, symmetricalantenna.Who comes up with these fucking antennas? Ugh.Yeah, put a balun on that retarded thing. And shoot an angry email to the above host noting the same.Tim

author: jimdeane
author_rank: Regular Contributor
timestamp: September 23, 2019, 09:59:49 pm
content: Fun update -- when I next went to use my HTX-202, the audio is dead. Hopefully I just fried the 386-type audio amp chip.I'll get into it and see.
Hakko FX-8801 handpiece holder steampunked!  - Page 1
Forum section: electronics / general

author: peteb2
author_rank: Regular Contributor
timestamp: September 20, 2019, 01:19:05 am
content: So after burning so many bits of junk on my busy (some say messy) workbench, including a nasty one to my pinky the other day when I stupidly shoved the holder during a ‘clear some space moment’ & made a split second contact with the iron, I mod’d the darn thing to prevent any more accidents.Who likes the steampunk look?

author: GreyWoolfe
author_rank: Unknown
timestamp: September 20, 2019, 01:15:44 pm
content: Where are the gauges, copper pipe and goggles?

author: Iwanushka
author_rank: Frequent Contributor
timestamp: September 22, 2019, 10:20:43 am
content: Cool, need to do the same to mine, somehow never tought about this... thanks for the idea

author: Zero999
author_rank: Super Contributor
timestamp: September 22, 2019, 06:59:52 pm
content: Oddly enough, I've never had that problem, even though my workbench is very messy. Copper or aluminium tape might work quite well and will certainly be easier to implement.

author: Stray Electron
author_rank: Super Contributor
timestamp: September 22, 2019, 08:07:35 pm
content: I can't say that I'm fond of the SteamPunk look but that does look good and I like the way that you twisted the wires and interlocked them at every junction.

author: coppercone2
author_rank: Super Contributor
timestamp: September 23, 2019, 04:37:48 am
content: why not drill holes and twist the wire in the end rather then all the screws
Disturbingly small camera modules - Page 1
Forum section: electronics / general

author: daqq
author_rank: Super Contributor
timestamp: September 20, 2019, 02:53:05 pm
content: OK, not exactly HD, but still:https://ams.com/miniature-camera-modules

author: SteveyG
author_rank: Unknown
timestamp: September 20, 2019, 03:06:50 pm
content: We've used some similar devices for endoscope applications from Omnivision - they are a bit tricky to assemble in volume. We had a steep learning curve with the CMO.Even the HD and higher resolution cameras are available in tiny packages.

author: Red Squirrel
author_rank: Super Contributor
timestamp: September 21, 2019, 02:27:43 am
content: Was going to say this is common given how small the camera modules in a phone are... but wow that *IS* VERY small!Those could be interesting to play with though, like you could build an inspection snake for water supply lines or other oddball applications with something that small.

author: amyk
author_rank: Super Contributor
timestamp: September 21, 2019, 03:52:15 am
content: That's a very odd resolution. 256x256 would've made more sense, but I guess they couldn't spare the extra few pixels...The datasheet is an interesting read, there is some slight Chinglishness. It only needs 4 wires to interface, two of which are for power. You can vary the frame rate by varying the supply voltage(!), and for 505 pixel clocks after each frame, the sensor lets you use the same pins as it normally outputs video on to write configuration data to it. It has a single 16-bit configuration register, which you must use at least once to set the pixel reset voltage to something other than the reset default of "do not use" 1.4v.It is not cheap though, which is surprising given how the die is probably smaller than a lot of other cheaper sensors with much higher resolution.

author: chicken
author_rank: Frequent Contributor
timestamp: September 21, 2019, 05:32:14 am
content: $68 on Digikey, ouch. My first project idea was fly eye. But that’s a non-starter at that price point.

author: BravoV
author_rank: Super Contributor
timestamp: September 21, 2019, 06:20:45 am
content: Wonder how much smaller the ones that are manucfactured for big brother's espionage/inteligence parties.

author: FreddieChopin
author_rank: Regular Contributor
timestamp: September 23, 2019, 05:23:43 pm
content: Quote from: BravoV on September 21, 2019, 06:20:45 amWe can only guess but you can order "spy" cameras from China that are disguised in a philips screw head. Perfect for spying in toilets

author: raptor1956
author_rank: Frequent Contributor
timestamp: September 24, 2019, 06:18:23 am
content: As small as the lens aperture is the resolution is going to be limited by diffraction even if they could pack several MP's into it.Brian
Hardware used in "The Girl with the Dragon Tattoo" for hacking? - Page 1
Forum section: electronics / general

author: bjdhjy888
author_rank: Regular Contributor
timestamp: September 22, 2019, 01:54:52 pm
content: 23:43What is the purpose of the hardware? Did she have to use it to access her desired data? She couldn't hack into the system without using it? I never understood.Also, what programming language do hackers use?https://en.wikipedia.org/wiki/The_Girl_with_the_Dragon_Tattoo_(2011_film)
Magnetic pogo connector - high power rated  - Page 1
Forum section: electronics / general

author: Free_WiFi
author_rank: Regular Contributor
timestamp: September 21, 2019, 09:16:20 pm
content: Got spend 7 hours today on the net and aliexpress to find some good high power magnetic pogo connector,but nothing.Do you guys know something that i could get,model,type etc ?https://it.aliexpress.com/item/32952441488.htmlI like this one,but i'm ot really sure that it's rated up to 4 AmpsP.S : I forgot to add this important detail,i need theconnector for DC current rated from 1 Amp to 5 Amps.Thanks.

author: NiHaoMike
author_rank: Super Contributor
timestamp: September 21, 2019, 10:47:46 pm
content: What about the magnetic quick disconnect connectors used on some kettles and electric pots?
Technical Problem - Blasting Rammstein song for hours during the night - Page 1
Forum section: electronics / general

author: Zucca
author_rank: Unknown
timestamp: September 19, 2019, 03:12:15 pm
content: https://www.euronews.com/2019/09/19/hungarian-stadium-apologises-after-blasting-rammstein-song-for-hours-during-the-nightI said it was not a technical problem, some sound tech are still laughing their ass off.

author: FreddieChopin
author_rank: Regular Contributor
timestamp: September 19, 2019, 05:26:10 pm
content: I'd be annoyed too if someone played kindermetal for hours.

author: james_s
author_rank: Super Contributor
timestamp: September 19, 2019, 08:13:24 pm
content: That's hilarious, reminds me of something I would have done for giggles when I was younger.

author: German_EE
author_rank: Super Contributor
timestamp: September 21, 2019, 09:15:09 am
content: They should be grateful that they didn't use a 0dB 1 KHz test tone instead of a little rock music.

author: Red Squirrel
author_rank: Super Contributor
timestamp: September 21, 2019, 09:38:11 am
content: Lol that is pretty funny. Wonder how that happened. If it was a prank, or an actual technical issue.Some modern sound equipment can be controlled with a tablet, I think through wifi or bluetooth. Makes me wonder how secure the protocols are...
googles quantum supremacy - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: September 21, 2019, 03:29:04 am
content: https://hardware.slashdot.org/story/19/09/20/2158233/google-reportedly-attains-quantum-supremacy

author: Cyberdragon
author_rank: Super Contributor
timestamp: September 21, 2019, 04:13:15 am
content: https://www.eevblog.com/forum/chat/google-claims-to-have-reached-quantum-supremacy/
OSRAM getting acquired by AMS AG - Page 1
Forum section: electronics / general

author: thexeno
author_rank: Regular Contributor
timestamp: September 20, 2019, 12:53:19 pm
content: Hi,is the first time I see a semiconductor company wanting to acquire a light related company.Do you think something will change on the user perspective? Seems quite new to me that they are acquiring a company on a different business; or nothing new on the table? The acquisition seems bounded to a 60ish%.Who know what would change, if we will have better products on our houses or on our design flexibility, for embedded systems engineers.Cheers,

author: Nauris
author_rank: Regular Contributor
timestamp: September 20, 2019, 03:29:07 pm
content: But Osram Opto Semiconductors, that sounds like semiconductor company, especially as they sold off their lamp business some years ago
AI Learns to read, learn and reason: Passes 8th grade science exam - Page 1
Forum section: electronics / general

author: windsmurf
author_rank: Frequent Contributor
timestamp: September 19, 2019, 05:25:19 pm
content: AI Learns to read, learn and reason: Passes 8th grade science examhttps://news.developer.nvidia.com/allen-institute-for-ai-announces-bert-breakthrough-passing-an-8th-grade-science-exam/

author: FreddieChopin
author_rank: Regular Contributor
timestamp: September 19, 2019, 05:29:52 pm
content: Does that mean that 8th grade exams in US are more and more suited to mentally disadvantaged people?
erase your flash just before detonation - Page 1
Forum section: electronics / general

author: ledtester
author_rank: Super Contributor
timestamp: September 19, 2019, 04:14:27 am
content: Fromhttps://nypost.com/2019/09/18/irans-supreme-leader-approved-saudi-oil-attacks-report/QuoteSome thoughts/questions...- Was flight data being stored in non-volatile memory?- Is this claim true or a just a red-herring being used by US intelligence to throw off the Iranians?- If the US was able to "reverse-engineer" the flight path did they really want that capability publicly disclosed?

author: BravoV
author_rank: Super Contributor
timestamp: September 19, 2019, 04:20:37 am
content: Don't trust everything you read, and most of the times, as a hint, just follow the money's trail, like which country will have major advantages to fill in the gaping hole of oil disruption globally.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 19, 2019, 06:55:04 am
content: So far, only the White House has been claiming Iran. I wouldn't put much confidence in that unnamed "US official".As for the technical plausibility, perhaps. I don't know how much storage they need to operate those things. If they took the cheap way out and put Linux on an SBC and patched in sensors and controls, it's quite possible; if it's a custom system (the more likely case, most militaries want something a bit more robust), who knows. Flash is certainly used, but they might keep the particulars of targeting and flight planning in SRAM (or less likely, DRAM?), and this would be one motivation behind that. Flash might still be used to hold terrain data, say; and if there's a limited amount available (so-and-so many megs, not gigs of storage), they might only load the local area, or at least at high resolution. That could still be whole quadrangles of the world though, not real helpful at nailing down any particular base.Looks like the wreckage is fairly intact, so even just desoldering the chips may prove fruitful. Flash can be decapped and probed intact, if worse comes to worst. Fractured chips aren't so useful though.Tim

author: StillTrying
author_rank: Super Contributor
timestamp: September 19, 2019, 08:01:48 am
content: Quote from: BravoV on September 19, 2019, 04:20:37 amOr see, perhaps.https://ichef.bbci.co.uk/news/976/cpsprodpb/FB39/production/_108831346_abqaiq_image2_976-nc.png
Damaged components on an M.2 SSD - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: September 19, 2019, 12:59:49 am
content: I have a bunch of Crucial branded M.2 SSD drives. On a significant number of them, a few components appear to be chipped (see below).It doesn't appear to impair their functionality and all of the drives were pulled out of working laptops and stored correctly. I could understand maybe one or two being damaged due to careless handling but 4 out of 9 seems oddly high. Granted, I didn't install them in the first place.Is this "normal" for these kinds of components to be damaged in this way during manufacturing and just passed as "acceptable"?

author: wilfred
author_rank: Super Contributor
timestamp: September 19, 2019, 01:15:14 am
content: Is there any kind of pattern to the orientation of the damage? Could it be heat? Are others visibly cracked at all?My other guess would be using second components. But since I know nothing about whether there is even a market for such devices or whether the reputation damage from using them would be a risk worth taking it is just speculation.

author: maginnovision
author_rank: Super Contributor
timestamp: September 19, 2019, 01:36:21 am
content: They're shielded inductors. Or at least they were. Now they're just inductors. They can chip easily so they weren't handled with care.

author: amyk
author_rank: Super Contributor
timestamp: September 19, 2019, 02:44:46 am
content: Those are inductors attached to TLV62080s, a little chip shouldn't affect their functionalty.

author: Halcyon
author_rank: Unknown
timestamp: September 19, 2019, 02:59:31 am
content: Quote from: wilfred on September 19, 2019, 01:15:14 amNot really a pattern but it's only those inductors on all the SSDs which are chipped, none of the other SMDs are damaged at all. They could be using second hand stock?Quote from: maginnovision on September 19, 2019, 01:36:21 amThis is entirely possible. I didn't install them so I can't say whether or not they were received like this.

author: james_s
author_rank: Super Contributor
timestamp: September 19, 2019, 04:10:26 am
content: A lot of those inductor cores are super brittle. It could be thermal cycles, or it could be vibration or shock, are/were these in laptops? Could just be a manufacturing defect causing the cores to crack.

author: Halcyon
author_rank: Unknown
timestamp: September 19, 2019, 04:17:00 am
content: Quote from: james_s on September 19, 2019, 04:10:26 amYep, pulled out of laptops.
Your home lab layout? - Page 1
Forum section: electronics / general

author: bjdhjy888
author_rank: Regular Contributor
timestamp: September 19, 2019, 12:36:45 am
content: By "layout", I ain't referring to "schematic layout" or "PCB layout".I mean where you put your PC, printer, soldering station, oscilloscope, multimeter, etc.I didn't give a rat's ass about it, until I recently saw an youtuber's workbench in his vid.Man, he literally puts his oscilloscope in the rear centre of his workbench. It kindda ran the bell for me and I immediately re-arranged mine.What do you think? How do you put your stuff around in your lab? I think it kindda reflects your skills and personality.

author: Psi
author_rank: Super Contributor
timestamp: September 19, 2019, 12:38:51 am
content: Have a look at this threadhttps://www.eevblog.com/forum/chat/whats-your-work-benchlab-look-like-post-some-pictures-of-your-lab/

author: blacksheeplogic
author_rank: Frequent Contributor
timestamp: September 19, 2019, 02:14:00 am
content: Quote from: bjdhjy888 on September 19, 2019, 12:36:45 amHow does my organization of my workbenches reflect my skills? Is the where I chose to place my scope now determining what I can / cannot work on? Why can I not place my scope where it makes the most sense for me?
HI DO u need LAUNCH SCANNER for $200 - Page 1
Forum section: electronics / general

author: joeqsmith
author_rank: Super Contributor
timestamp: September 22, 2019, 05:52:38 pm
content: What's up with the PM SPAM? Anyone else seeing this? Sent from:Dean2maginnovision

author: maginnovision
author_rank: Super Contributor
timestamp: September 22, 2019, 10:15:41 pm
content: That's my bad, I didn't check until AFTER I responded that other people were attached. Judging from his posts he's someone trying to work on cars but mostly clueless and is now trying to sell garbage?
Metcal STSS-PS2V-02 restructuring questions. - Page 1
Forum section: electronics / general

author: Free_WiFi
author_rank: Regular Contributor
timestamp: September 17, 2019, 11:52:42 pm
content: As my title already says i got some questions about my 20 years old unit "Metcal STSS-PS2V-02".I wish to make the following restorations on it :1)Total Re-Cap of all lithium caps2)Replace the transformer with an tiny good SMPS like this :https://it.aliexpress.com/item/32837501790.html3)Replace the power socket without the EMI Filter - because of the SMPS4)Re-pasting the thermal paste on the main RF transistor5)Check the values on trimmer resistorsEND.However i got my self an question about the trimmer resistors,the problem with them is that no one knows which must be the original value for each of them.I tried to find something on internet about this unit,but nothing....so at this point what i must to do?PS : The trimmer resistors tend to drift over the time + considering the age of this unit i'm sure at 100% about they're spec off .

author: thm_w
author_rank: Super Contributor
timestamp: September 18, 2019, 12:15:55 am
content: At that point would you be better off building one of the clone designs?https://hackaday.com/2019/06/16/homemade-magic-makes-the-metcal-go/That or keep an eye out for a cheap second hand backup.The trimmer resistors won't have an "original value" they will probably be tuned on each station, ie for frequency setpoint or something similar.

author: Free_WiFi
author_rank: Regular Contributor
timestamp: September 18, 2019, 12:30:49 am
content: The point was to keep this unit as the last Metcal yet Made in USA,it's like an vintage piece of history which is still working as a "new unit" and this is incredible ....However,if this is the situation then maybe i will keep it just like an souvenirP.S I don't like that russian clone ... but anyway it's a nice toy to play around

author: Free_WiFi
author_rank: Regular Contributor
timestamp: September 18, 2019, 12:40:35 am
content: In any case i'm always asking my self- Why the metcal generators work only at 13,56 Mhz if every single tip has it's own resonance frequency?- At this point would it not be better to build an "Auto Tuning RF Generator" to make it working at highest level of efficiency ?

author: Someone
author_rank: Super Contributor
timestamp: September 18, 2019, 01:25:09 am
content: Quote from: Free_WiFi on September 18, 2019, 12:40:35 amYou need to use a well defined frequency otherwise it will not pass RF emissions limits.https://en.wikipedia.org/wiki/ISM_bandThe tips don't have a resonance frequency which makes them work, they use the curie point transition to control the power flow:https://en.wikipedia.org/wiki/Curie_temperatureThat can vary a little with the alloy used, but only changes the temperature.

author: MosherIV
author_rank: Super Contributor
timestamp: September 18, 2019, 07:05:37 am
content: Does the station work?If so, why try to re-work it?If it works, leave it alone. You will do more harm than good.
(Not EE but BIO) Lab explosion - Page 1
Forum section: electronics / general

author: Rick Law
author_rank: Super Contributor
timestamp: September 17, 2019, 07:57:26 pm
content: This is technology related but not directly EE. It is however a piece of news EE'ers would not want to miss."On Monday, a gas explosion occurred at Vector, the State Research Center of Virology and Biotechnology in the science town of Koltsovo, some 20 km (12 miles) from Novosibirsk, the third most populous city in Russia.The research centre isone of only two placesin the world allowed to retainstock of the Variola viruses that cause smallpox. The other one is a Centers for Disease Control and Prevention (CDC) facility in Atlanta....The chances that the blast somehow let loose a plague onto the world seemexceedingly small......the fact it also housesEbola, bird flu, anthrax, and a bunch of other nasties;..." [bold added]It has been reported at many news outlets. Below link is to the ScienceAlert.com article.ScienceAlert.com, Sep17, 2019 "Explosion at Russian Lab That Houses Smallpox Sends Internet Into Panic"Link here:https://www.sciencealert.com/explosion-at-russian-lab-that-houses-smallpox-sends-internet-into-panicEDIT: Sorry, posted in the wrong section - I had intended to put this in general chat. Moderator, can you move this if appropriate?
Someone to look over me - Page 1
Forum section: electronics / general

author: L_Euler
author_rank: Regular Contributor
timestamp: September 16, 2019, 06:59:22 pm
content: For those times when you need someone to tell you what's for dinner, who your uncle is, or something is just crap, I have installed Dave TV adjacent to my bench. Actually I put it in as a monitor for my microscope, but I had an Apple TV laying around and added that as well.
Simple question...how does it going ? - Page 1
Forum section: electronics / general

author: Martin72
author_rank: Super Contributor
timestamp: September 15, 2019, 09:33:51 pm
content: Hi,See this (randomly choosen) post, the attached pictures:https://www.eevblog.com/forum/testgear/the-siglent-sdg2042x-thread/msg2608590/#msg2608590How does it going ?What I do until now is uploading the pics, then copy the link and post it here…Martin

author: windsmurf
author_rank: Frequent Contributor
timestamp: September 15, 2019, 09:42:05 pm
content: Its all right there in the menu choice when adding attachments.

author: Martin72
author_rank: Super Contributor
timestamp: September 15, 2019, 09:43:19 pm
content: Test....Oh my god, so simple...Shame on me and thanks to You !
have you heard of a chibson? - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: September 16, 2019, 12:02:56 am
content: gibson vs chibsongibson had money troubles, exited bankruptcy in 2018. almost taken over by a chinese company.the KRK monitors in some of the repair vids here are under gibson.

author: windsmurf
author_rank: Frequent Contributor
timestamp: September 16, 2019, 06:24:35 am
content: I have a Chibson which I had custom made for me from Aliexpress before the knockoffs got banned.I had it made with no logo (didn't want it to say Gibson), and in a custom color, and axcess neck joint. I had to do a lot of work on it, but that was my plan with this guitar, including replacing pickups, new nut, new tuners, and new bridge. The axcess neck is much better than the Gibson Les Paul Axcess and Gibson Les Paul Standard HP that I have as far as comfort playing at the 22nd fret is concerned. I also scalloped the entire fretboard, which I'd never do to my Gibsons. It plays and sounds great now!
Voyager plasma wave sensor raw audio jupiter and saturn! - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: September 12, 2019, 03:25:30 pm
content: So this is what the VLF for those two planets actually sound like. I'm not sure what the other recordings are of Jupiter that are on the internet.You can hear the power supply at 2khz, the "drum" sound is the maneuvering thruster which fires a lot; must use very little fuel. The horizontal stacked bars sound is of another science instrument.Would love to find a science or electronics article describing how this antenna worked or more about the radio or how it handled all the radiation. I saw the voyager ground test/back up probe in person at the Smithsonian it even has the RTG less the plutonium . The arm that I believe held this instrument makes the craft very long. and about the size of a big pianohttps://youtu.be/5j5IObIReqkhttps://youtu.be/t3oi0_43E3Q

author: Beamin
author_rank: Super Contributor
timestamp: September 12, 2019, 03:33:44 pm
content: Here is Uranus with some really strange sounds at this point:https://youtu.be/JBFHG_Oraw0?t=328Not sure what it is. On the Jupiter on you can hear a whistler confirming that there is lightning on the planet only the lightning travels hundreds of miles long. Must be red sprites and blue jets but different colors due the different gasses. Be a while before we see that.
Liberation Day 75 years anniversary - Page 1
Forum section: electronics / general

author: Kjelt
author_rank: Super Contributor
timestamp: September 14, 2019, 10:40:21 am
content: Hi,75 years ago the south of our country was liberated by a joined operation of American, English, Canadian and Polish troops and yes with smaller forces a lot more countries participated ofcourse.Also I don't want to forget the huge sacrifice Russia brought, without its massive front in the east the war would have taken much longer.Every year we still celebrate this in two weeks with massive airtroop landings and a procession of hundreds of vehicles from that era (and a bit newer) maintained by volunteers.The procession is from the south of our country to the middle around Arnhem where in 1944 the liberation was unfortunately halted.Since this is an international forum, I know many of you have lost family in that period of time.All I want to say, after 75 years, they have not been forgotten and we are still very greatfull.Thank you!

author: BravoV
author_rank: Super Contributor
timestamp: September 14, 2019, 01:51:00 pm
content: Quote from: Kjelt on September 14, 2019, 10:40:21 amSame here, my family lost few members in that era, when trying to liberate our country from your country, that had been looted & occupied our land, for centuries (plural).Should one day, you walk thru your country praising how great the whole things like infrastructures and other great things that was and is supporting you, and maybe so proud too on how your great nation was built upon. Please,don't forgetwhere all of those great things as the great foundation for your country, was originated from centuries ago.A refreshment ->https://en.wikipedia.org/wiki/Dutch_EmpireDon't worry, you're forgiven, but not forgotten.

author: Simon
author_rank: Unknown
timestamp: September 14, 2019, 02:56:43 pm
content: most of our current problems are due to people holding onto history. It was terrible that it happened and while those that gave their lives for freedom or whatever you claim they gave their lives for it is history and we should look to the future and peace. This is not a topic for this forum.
5 inch IPS TFT - Page 1
Forum section: electronics / general

author: Till Matte
author_rank: Contributor
timestamp: September 11, 2019, 04:37:33 am
content: For a new project, we are looking for a 5 inch IPS TFT LCD, 800x480 resolution, it need wide temperature, who used Mac light 5" IPS TFT before?https://www.szmaclight.com/product/5-inch-IPS-TFT-LCD-wide-temperature.htmlWho can tell me its performance?Any suggestion?
Proper use of ESD / Static Dissipative / Conductive Mats - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: September 10, 2019, 02:21:41 am
content: Apologies if this is a noob question; When using a mat on a surface (such as a table top), I understand ideally that the mat and the person should be connected to a grounding point to prevent static discharge damaging electronics. However are there situations where the same or similar protection can be offered without the use of a fixed ground point? i.e.: Connecting a wrist strap directly to the mat so that the mat and and equipment placed on top are at the same electrical potential.

author: Siwastaja
author_rank: Super Contributor
timestamp: September 10, 2019, 08:13:36 am
content: If all your devices under development live on that ESD mat, and every time you start working, you connect yourself to the mat first, then theoretically this will work: everything's on the same potential. But this is a very small island.In reality, people move around, and equipment moves around. In a perfect setting,everythingwould be slightly conductive, and connected to the same reference - which, logically, will be the actual ground as in the soil around the building. So you want to make the "island" as large as possible.By connecting your ESD mat to the mains protective earth, you are closer to that ideal, with the least amount of work, building materials such as concrete being very slightly conductive.In a more professional setting, using more controlled conductivity in building materials - such as ESD floor tiling etc. - becomes important. They are still referenced to the actual earth, to maximize the "island" and remove places where large static discharges would occur.

author: FreddieChopin
author_rank: Regular Contributor
timestamp: September 10, 2019, 06:04:16 pm
content: Quote from: Siwastaja on September 10, 2019, 08:13:36 amBe aware that you have a proper mains (TT) system and not TN-C or TN-C-S. In my old work electrican misconnected phase and ground and I had high impendance 230V on ESD mat in workshop (more like janitor closet but still had a soldering iron). Most devices are today in II class so earth fault is not major issue.
Blackwells bookshop is now selling pipe fittings - Page 1
Forum section: electronics / general

author: tggzzz
author_rank: Super Contributor
timestamp: September 08, 2019, 07:39:19 am
content: One of the few remaining decent bookshops in England, Blackwells (Oxford, Cambridge, etc), has branched out into being a plumbers' merchant. Their fleabay page is selling more than 5000 different types of pipe fitting:https://www.ebay.co.uk/sch/Pipe-Fittings/63900/m.html?_nkw=&_armrs=1&_ipg=&_from=&_ssn=blackwelloxford&_sac=1One example is "Fashion House 4 Mini Notebooks by Megan Hess (author)"https://www.ebay.co.uk/itm/Fashion-House-4-Mini-Notebooks-by-Megan-Hess-author/333238438482How did I notice this? I have a search for any "Business Office and Industrial" items made by a particular company, and a some authors have the same name. The search results are "polluted" by completely irrelevant books. That's irritating.There are several other sellers pulling exactly the same stunt.What can be done about this? I report the items under "listing practices, search browse manipulation, incorrect listing category", with no apparent effect.

author: PA0PBZ
author_rank: Super Contributor
timestamp: September 08, 2019, 08:35:01 am
content: Monster_bookshop is doing the same, 594K in all categories, 455K in books.https://www.ebay.co.uk/sch/m.html?item=383024099969&_ssn=monster_bookshop

author: Zero999
author_rank: Super Contributor
timestamp: September 09, 2019, 02:33:52 pm
content: Well there's no longer any money in books, so it makes sense to diversify. Don't like it? Buy more books!
MathJax available? - Page 1
Forum section: electronics / general

author: ledtester
author_rank: Super Contributor
timestamp: September 05, 2019, 04:59:34 am
content: I know there has been some discussion about being able to use a TeX-like markup for mathematical formulas.I just happened to look at HTML source for the forum pages and spotted this:Code:<script type="text/javascript" async="async" src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML,Safe"></script>So is it possible to use MathJax in forum posts?

author: emece67
author_rank: Frequent Contributor
timestamp: September 05, 2019, 07:48:05 am
content: .

author: nfmax
author_rank: Super Contributor
timestamp: September 05, 2019, 07:54:01 am
content: On the ancient iPad I use to browse the forums, seeing the 'mathjax loading' popup is a constant, long-lasting and annoying sight. I haveNeverseen it used before this post.Dave - take it out and shoot it!

author: emece67
author_rank: Frequent Contributor
timestamp: September 05, 2019, 09:32:45 am
content: .

author: sokoloff
author_rank: Super Contributor
timestamp: September 05, 2019, 11:06:40 am
content: Quote from: nfmax on September 05, 2019, 07:54:01 amI don't think Dave's going to take the time to travel all the way over to your location to shoot your ancient iPad.You'll have to do that yourself!

author: Ian.M
author_rank: Super Contributor
timestamp: September 05, 2019, 12:13:27 pm
content: +1.Also removing Mathjax would break existing posts that use it to display equations.It was added by popular request and if it doesn't work on your antique device, the best option would be for you to blockCode:https://cdn.mathjax.org/mathjax/latest/MathJax.jseither with a content blocker or firewall, or if your ipad is jailbroken by adding hosts file entry.N.B. it doesn't load Mathjax on the mobile version of the site, so maybe use that?

author: ledtester
author_rank: Super Contributor
timestamp: September 07, 2019, 02:41:27 am
content: Just noticed this in the javascript console:Code:WARNING: cdn.mathjax.org has been retired. Check https://www.mathjax.org/cdn-shutting-down/ for migration tips. MathJax.js:32:13
ISRO about to attempt moon landing - Page 1
Forum section: electronics / general

author: StillTrying
author_rank: Super Contributor
timestamp: September 06, 2019, 08:54:02 pm
content: Crashed.

author: chris_leyson
author_rank: Super Contributor
timestamp: September 06, 2019, 09:44:31 pm
content: So close, it's a shame. Because Vikram was spinning at 2km from the surface with a vertical velocity of 60km/s it's end of mission. Hopefully ISRO find some clues from the telemetry. Good luck ISRO

author: CatalinaWOW
author_rank: Super Contributor
timestamp: September 06, 2019, 09:54:35 pm
content: If I interpreted the video correctly it was even closer than that. ~300 meters and 60 meters/sec descent rate. Really, really close to pulling it off. As you say, hopefully the telemetry will let them figure out what went wrong, and then it is up to the budgeteers to arrange another try.

author: hamster_nz
author_rank: Super Contributor
timestamp: September 07, 2019, 12:42:29 am
content: Just watched the replay. First guess was one of the final descent engines didn't fire, and the unbalanced thrust sent it spinning rather than breaking.But the sudden change in trajectory means quite a bit of momentum went somewhere, so it might be more likely that there was some sort of failure that gave it a big kick.Darm, that was looking really good up till then.

author: amyk
author_rank: Super Contributor
timestamp: September 07, 2019, 02:09:08 am
content: Ironic how that guy doing the commentary kept praising them for the "ultra low cost" of the mission... I thought it was common knowledge that 10% of the effort gets you 90% of the way, and it's the last 10 or 1% that takes 99% of the effort...?

author: Rerouter
author_rank: Super Contributor
timestamp: September 07, 2019, 02:28:21 am
content: The effort you have to put in is statistics at its most evil,lets say your efforts amount to a confidence of 50% that everything will go perfectly,Double your efforts, it gets you to 75%Triple your efforts, it gets you to 87.5%Quadruple your efforts, to 93.75%Quintuple your efforts, to 96.875%so the closer you want to 100%, the more exponential the amount of effort you need to put in, and anything you can do to increase your confidence per round is much better than just throwing resources at it. So you can get away with low costs, if some really clever people can bump that initial confidence up to say 90%, so by the second round your already at 99%,again, you never get 100%, no matter how many people or dollars you throw at it, you can only approach it.

author: hamster_nz
author_rank: Super Contributor
timestamp: September 08, 2019, 10:12:25 am
content: The video in this tweet syncs up the radio frequency waterfall over the stream:https://twitter.com/DJSnM/status/1170374542549630976(is it still a waterfall if it goes sideways)And here is the last 5 minuteshttps://twitter.com/cgbassa/status/1170434231622914048As a sudden change in doppler means a sudden change in speed, so it looks like something dramatic happened.
Google Jumpy search box - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: September 07, 2019, 12:09:29 am
content: I notice a jumpy search box some months ago and a week later it went away 't but now it has returned.Try selecting something typed in to type, copy or paste inbetween, then the box moves backwards and the selection moves forward by three characters.So now, I can't just click it, I have to click first but if I want to copy something the on the page or minimize, the box goes back fowards and I have to click again... either at the end or in the wrong place by 3 characters up.Fortunately I don't see it on the non javascript mobile version yet.Like the URL to breadcrumbs change on the results I can't find much about this one other than similar past issues but the box didn't move back.I don't understand the reason for that "change" of it moving backwards as nothing before it seems to be showing or hiding on selection.What do you think?

author: xrunner
author_rank: Super Contributor
timestamp: September 07, 2019, 12:31:44 am
content: Can't duplicate it here (Firefox/Windoze).
Touring an OPEN Radio Shack in 2019 - Page 1
Forum section: electronics / general

author: n5al
author_rank: Contributor
timestamp: September 15, 2019, 01:41:52 am
content: Good news that there are still some Radio Shack stores around the U.S. We have many Radio Shacks around Mexico. But, they don't sell electronic components and such (never did, as far as I can remember). Instead, it's mostly TVs, cell phone accessories, electronic toys, etc. Many of the items they sell can also be found in a Walmart, for a lower price. Still, the Radio Shack stores live on -- there are 12 currently operating here in Guadalajara.

author: AG6QR
author_rank: Frequent Contributor
timestamp: September 15, 2019, 06:31:24 am
content: Great to see that there's still at least one in the USA.I was in Peru this past July, and while in a large shopping center in Lima, I was surprised to stumble across a RadioShack store:The store's primary name was "Coolbox", but it featured a big "RadioShack Authorized Distributor" sign in the window (my translation from the Spanish). It had a wide selection of various cables, adapters, consumer audio, cell phones and accessories, unusual batteries, electronic toys, etc., with much of the merchandise carrying the RadioShack brand. It did not carry resistors, capacitors, transistors, soldering supplies, or other supplies for building or repairing of electronic devices. Oh well. I noticed several other Coolbox/RadioShack stores in other places around Peru.
serious security issues with Logitech's Unifying technology - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: July 10, 2019, 01:31:24 pm
content: Several security issues with Logitech's wireless keyboards, mice, trackballs or presenters using the Unifying wireless technology were found. Logitech plans to fix only a few because of interoperability reasons. Back to cables, I'd guess.Logitech keyboards and mice vulnerable to extensive cyber attacks:https://www.heise.de/ct/artikel/Logitech-keyboards-and-mice-vulnerable-to-extensive-cyber-attacks-4464533.htmlLogitech wireless USB dongles vulnerable to new hijacking flaws:https://www.zdnet.com/article/logitech-wireless-usb-dongles-vulnerable-to-new-hijacking-flaws/

author: Iceberg86300
author_rank: Contributor
timestamp: July 10, 2019, 10:07:44 pm
content: So physical access is required or somebody needs to catch me pairing a new device?I can say I'm less than worried about this.Regards,Steve

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 10, 2019, 11:56:25 pm
content: How often has security through obscurity actually worked on a popular product?

author: madires
author_rank: Super Contributor
timestamp: September 05, 2019, 09:14:25 am
content: Logitech has released the update:https://support.logi.com/hc/de/articles/360035037273... but there's already a workaround which takes just a little bit longer to read the crypto keys.
Battery powered LED work lights - Page 1
Forum section: electronics / general

author: raptor1956
author_rank: Frequent Contributor
timestamp: September 03, 2019, 08:09:16 pm
content: I'm looking to get a couple battery powered LED work lights that can be dimmed but at max brightness is over 500lm. Preferably using 18650 batteries and with mounting options like magnetic swivel base. Lights also need to be reasonably tolerant of fluids -- not water proof per se but not so vulnerable at they fail the moment they get a little wet. Lastly, instead of a 360 degree pattern as a lantern style might have I think 120 degrees or there abouts would be preferred. Any pointers?Brian
LINDY KVM Switch PRO, anyone has any pic of the mobo? - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: September 05, 2019, 10:25:28 am
content: I am considering commercial KVM switch for a project. LINDY KVM Switch PRO looks interesting because it has all the connector on the same side, it's small size, and it has four buttons.But I'd like to know what is used on the motherboard, which mux, and which controller.e.g. on some Dlink KVM-switches I have recently seen the EM78p447, or some 8051 chip.
theoretical rammifications of audiophool ideas? - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: September 02, 2019, 05:44:39 am
content: so does anyone have any theories on what would happen to matter and energy and the nature of the world if your choice of favorite audiophool theory is (may not be easy to find a solution). ?think 'cat logic', or exploring the physical nature of the audiophool universe in the nature of "Flatlander".Flatland: A Romance of Many Dimensionswhoever wrote it, I just watched the youtube videos
Re: FeelElec(FeelTech) product user manual and PC software download link - Page 1
Forum section: electronics / general

author: FeelElec
author_rank: Contributor
timestamp: September 02, 2019, 09:55:21 am
content: Dear Customers,This is our company products user manual and PC software download link:https://drive.google.com/open?id=0B3N_NW8vylrmWU93b0EwRjhrQlEBest regards,SarahFeelElec
Hong Kong Electronics Fair 2019  - worth attending? - Page 1
Forum section: electronics / general

author: SPRX
author_rank: Regular Contributor
timestamp: August 29, 2019, 06:08:18 am
content: I have an option to alter my travel itinerary to route via Hong Kong to attend the Electronics Fair 2019 (on mid Oct).Is it worth attending/effort? Has anyone here attended in the recent past years ? Do you get good deals on Electronic test equipment etc?Any other good places in Hong Kong for Electronic shopping?Cheers

author: tautech
author_rank: Super Contributor
timestamp: August 29, 2019, 07:34:35 am
content: Always threatened to go but never have.With the current HK unrest I'd be giving it a wide berth this year.

author: windsmurf
author_rank: Frequent Contributor
timestamp: August 31, 2019, 08:45:13 am
content: Quote from: tautech on August 29, 2019, 07:34:35 amYes HK is not somewhere I'd want to visit anytime soon... Tianamen 2.0 may be brewing...https://foreignpolicy.com/2019/08/14/how-close-is-hong-kong-to-a-second-tiananmen/I would not be surprised if the Electronics Fair gets cancelled this year...

author: GlennSprigg
author_rank: Super Contributor
timestamp: August 31, 2019, 12:48:51 pm
content: The Chinese Government welcomes all new visitors. Just make it a one-way ticket !!!!While there, do NOT think, do NOT express opinions, do NOT side with anyone.Do NOT contact the media. Don't bother with embassies!! Hang on... but we aretalking about Hong-Kong(Being corrected as we speak).

author: coppercone2
author_rank: Super Contributor
timestamp: August 31, 2019, 12:55:15 pm
content: you should join theprotestinsurrection

author: SPRX
author_rank: Regular Contributor
timestamp: September 01, 2019, 10:28:23 am
content: Quote from: windsmurf on August 31, 2019, 08:45:13 amYep, this is very scary
Dick Smith Electronics Data Section - Page 1
Forum section: electronics / general

author: gnif
author_rank: Unknown
timestamp: September 01, 2019, 11:56:26 pm
content: Hi All,A friend had an old copy of the Dick Smith Electronics catalogue and I figured I would grab a copy of the data section to keep handy, for those that also want it I have uploaded it here.https://hostfission.com/media/downloads/DSEDATA.pdf

author: wilfred
author_rank: Super Contributor
timestamp: September 02, 2019, 12:16:06 am
content: Do you want to rotate the inverted pages?And thanks for sharing.I did it for my copy using PDF-Shuffler.https://sourceforge.net/projects/pdfshuffler/

author: gnif
author_rank: Unknown
timestamp: September 02, 2019, 12:49:15 am
content: If you want to share a copy that is fixed I will update it, I simply printed it out so I am not too worried about it

author: wilfred
author_rank: Super Contributor
timestamp: September 02, 2019, 03:37:55 am
content: It is too big for me to upload. But I did find this in my collection.
Forum Members Country Icon ?? - Page 1
Forum section: electronics / general

author: shakalnokturn
author_rank: Super Contributor
timestamp: September 01, 2019, 04:22:49 pm
content: Noticed that today.A new bug for the admins?

author: shakalnokturn
author_rank: Super Contributor
timestamp: September 01, 2019, 04:25:40 pm
content: Ah sorry, could have been more original and read a little further. Will try to correct this...https://www.eevblog.com/forum/chat/forum-members-country-icon/Edit: done

author: shakalnokturn
author_rank: Super Contributor
timestamp: September 01, 2019, 04:36:32 pm
content: This flag problem could cause fatal forum database runaway....