hybridfree/eevblog-posts huggingface dataset:
Once again, a KiCad 5.0 ray tracing - Page 1
Forum section: electronics / general

author: technix
author_rank: Super Contributor
timestamp: September 16, 2018, 05:03:44 pm
content: This one is rendered on my dual Xeon E5-2680 machine at 4K resolution.Ray tracing seemed to have an almost perfectly linear scaling, since this took me 34 seconds on this machine with 16 total cores across two processor chips, but a similar ray tracing took me almost two minutes on a quad-core machine with slightly faster cores.I wonder if KiCad have a render to file option? That might be useful if I want to produce a printout for my projects, I can render extra high resolution images (for example, 15320x8640 or 16K 8640p - 16x pixels of the current 4K monitor.) Also since there would be more pixels to draw it also serves as a better benchmark.

author: Bassman59
author_rank: Super Contributor
timestamp: September 17, 2018, 08:59:30 pm
content: Quote from: technix on September 16, 2018, 05:03:44 pmKicad can export the entire assembly to a STEP file, which of course you can import into your favorite 3D CAD viewer/program and print.

author: Rerouter
author_rank: Super Contributor
timestamp: September 17, 2018, 09:35:51 pm
content: I'm not sure if its made it into the nightlies yet. But I recently saw people talking about this in a bug report. To give the option to export the final image to any size.That is a feature I am really keen on. I currently have 3 monitors and shuffle them around in windows to reflect the board shape for long format images.Also the silly back of the board is darker issue.

author: Mr. Scram
author_rank: Super Contributor
timestamp: September 17, 2018, 09:55:55 pm
content: I must admit I'm not too impressed by the render quality, but I guess you don't have to dick around for hours to get a passable image.Nice SushiBits plug.
Should  i go to Chinese LED show this week? - Page 1
Forum section: electronics / general

author: ocset
author_rank: Super Contributor
timestamp: September 19, 2018, 07:19:38 pm
content: Hello,I am British but my friend in China has asked me to come to China this week for the LED China show in Shanghai…https://www.ledchina-sh.com/en-us/He says he will show me LED streetlights which he says he can sell through myself in UK. He says I will make £30 per LED streetlight sold in UK.Do you think many other British people have been invited over by the Chinese for the same show?I don’t want to waste the Air Fayre.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 19, 2018, 07:27:11 pm
content: Quote from: treez on September 19, 2018, 07:19:38 pmI'm sure it would be interesting, but do you already have a visa for China?If not it'sprobably too late to get one in time, unless there is a short-term limited area visa on entry as they have in Shenzen

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 19, 2018, 07:32:01 pm
content: Quote from: treez on September 19, 2018, 07:19:38 pmIf you can do it, so can anyone else.

author: Gyro
author_rank: Super Contributor
timestamp: September 19, 2018, 07:44:52 pm
content: Quote from: treez on September 19, 2018, 07:19:38 pmYou are covering old and familiar ground here Treez! ...https://www.eevblog.com/forum/chat/wish-to-make-bring-electric-toy-cars-to-market/msg1672160/#msg1672160Your Chinese friend is going to land you with exactly the same problems as with his 'Toys', probably worse.Youas theimporterwill become responsible for all EMC and Safety approvals, customer returns, reliability, Tax and other issues!

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 19, 2018, 09:21:11 pm
content: Quote from: Gyro on September 19, 2018, 07:44:52 pmNot to mention marketing, sales, documentation and all the other boring stuffMaybe time to set your sight beyond streetlights...
MGE Protection Box 5 Surge Protector disassembled - Page 1
Forum section: electronics / general

author: matrixcrawler
author_rank: Newbie
timestamp: September 17, 2018, 03:22:29 pm
content: Hi!I've had this surge protector and the protector led was not on for a while now so decided to replace it.For curiosity I've disassembled it. To be honest I'm not good with electronics at all, but isn't this missing some MOVs?Was this protecting from anything at all? (see attachments)I'd appreciate some explanations on how this was supposed to work without MOVs if at all.Thank you.

author: SeanB
author_rank: Super Contributor
timestamp: September 17, 2018, 06:16:22 pm
content: The MOV units would be in the section plugged into the socket inside the case, the rest of it is just a power switch ( double pole, but doubt it will handle switching 10a for long, might do a few cycles at full load before failing), some input filtering ( the 2 series chokes on the power lines, and a simple mains filter with a class X capacitor across the mains and a pair of class Y capacitors from the mains to the protective earth.The MOV unit would have had the fused ( probably a thermal fuse) MOV units, arranged with 3 MOV units. 1 across the mains, and the other 2 from the phase and neutral to the protective earth line, probably with a thermal fuse on each phase wire before the MOV units to prevent fire when they start to degrade and overheat. The fault LED/neon is wired across the thermal fuses, so that it lights when they go open circuit from overheating, indicating it is time to replace the MOV unit.

author: matrixcrawler
author_rank: Newbie
timestamp: September 17, 2018, 07:05:37 pm
content: You're right. I did not even think that was an important part of this device. It looked like just some plugin module which could be replace by something else if needed. (attachments)That got me thinking, could this be "fixed" just by buying a new "plugin module" which contains the MOVs?

author: Gyro
author_rank: Super Contributor
timestamp: September 17, 2018, 08:16:34 pm
content: That looks incredibly messy inside.It must be hell to assemble!I have to wonder how much clamping effect the MOVs and GDTs are going to have at the far end of the unit and connected via a pin header and socket.
Cassette TV in 1970 plus First Look: Motorola Teleplayer EVR (teardown) - Page 1
Forum section: electronics / general

author: johnlsenchak
author_rank: Frequent Contributor
timestamp: September 22, 2018, 02:52:31 pm
content: Cassette TV in 1970 plus First Look: Motorola Teleplayer EVRdatabitsPublished on Sep 22, 2018In my research on EVR I discovered an article written in 1970 regarding the home video war of that time period. I'll place a link to the article below. (If you find it through Google it doesn't require you to subscribe) At that time, the term being coined was "Cassette TV". The article was so good, I made a video about it. I hope you enjoy it. Plus, I received my first EVR player and we'll take a close look at its awesomeness.
Sources of "decent cheap cables" OTHER than Monoprice? - Page 1
Forum section: electronics / general

author: cvanc
author_rank: Frequent Contributor
timestamp: September 17, 2018, 01:43:11 pm
content: Is it me, or have a lot of the products from Monoprice declined in quality? Just spent over $300 on cables and many of them don't seem as nice as what I've gotten in the past.What are my alternatives for inexpensive, decent, pre-made consumer cables? Parts Express, maybe? Others?Thanks...

author: TERRA Operative
author_rank: Super Contributor
timestamp: September 17, 2018, 03:21:45 pm
content: What type of cables? I have received shielded Cat6e cables from them not too long ago that were ok.For 50BNC, I make my own as needed from Canare parts etc.
Exactly what I would expect from down under... - Page 1
Forum section: electronics / general

author: metrologist
author_rank: Super Contributor
timestamp: September 20, 2018, 07:28:23 pm
content: Maybe I will have one...

author: Halcyon
author_rank: Unknown
timestamp: September 20, 2018, 10:25:59 pm
content: We also have a company making V8 chainsaws
Why Should You Use a Thermistor in a Tube Amplifier? (temperature coefficient)  - Page 1
Forum section: electronics / general

author: johnlsenchak
author_rank: Frequent Contributor
timestamp: September 17, 2018, 08:22:13 pm
content: Why Should You Use a Thermistor in a Tube Amplifier?Blueglow ElectronicsPublished on Sep 17, 2018Video telling what a thermistor is and why it is helpful in a tube amplifier.
USB-C (PD) to DC adapters: do they exist? - Page 1
Forum section: electronics / general

author: analogo
author_rank: Regular Contributor
timestamp: September 15, 2018, 11:28:23 am
content: Are there adapters that can take power from a USB-C (with support for PD) and output a certain DC voltage to a standard barrel jack?I have a common 19v laptop and I would like charge it from the chubby USB-C power bank that I carry with me when I travel.I know that USB-PD can deliver 19 volts, but only after an handshake. Are there adapters that perform this handshake and then provide the requested voltage to a standard barrel jack?

author: maukka
author_rank: Unknown
timestamp: September 15, 2018, 11:52:08 am
content: HKJtestedone. Just put a DC barrel connector on the output.Here's another.

author: analogo
author_rank: Regular Contributor
timestamp: September 16, 2018, 07:16:40 am
content: So the "technical" term istrigger, not adapter.I wonder if that term comes from the USB documentation or just a weird Alibaba translation.Thank you maukka.

author: wraper
author_rank: Unknown
timestamp: September 16, 2018, 07:43:00 am
content: Unless your power bank can output full power your laptop takes from it's charger, it won't work. There is no way to tell it to consume less power. Otherwise if you force profile 4 or 5 to output 20V, it will work completely fine with a laptop specified for 19V.

author: Hypernova
author_rank: Unknown
timestamp: September 16, 2018, 02:17:08 pm
content: Quote from: analogo on September 16, 2018, 07:16:40 amIt's from that fact that you need to perform negotiation with the PD source to get the higher voltage. If the board has a local boost converter then it would be correct to call it an adapter.

author: wraper
author_rank: Unknown
timestamp: September 16, 2018, 02:42:18 pm
content: Quote from: blueskull on September 16, 2018, 02:27:21 pmReally? Usual laptop (without USB-C charging capability) with buck converters will somehow develop boost converters inside itself?

author: LapTop006
author_rank: Unknown
timestamp: September 17, 2018, 04:51:24 am
content: Ibuilt something like thata few years ago.There's a few devices available now (USB-PD buddy for example), although I don't think I've seen any consumer-ready versions.
RIP Siegfried Linkwitz - Page 1
Forum section: electronics / general

author: precaud
author_rank: Frequent Contributor
timestamp: September 15, 2018, 03:46:16 pm
content: If you've been at all involved in designing and making speaker systems in the last 3 decades, chances are very high that Siegfried had a significant influence on your design considerations and/or process in one way or another.https://www.avhub.com.au/features/hi-fi/obituary-siegfried-linkwitz-193582112018-512500And this was all done in his spare time, and given away, put in the public domain.. His real job was designing RF network and spectrum analyzers at Hewlett Packard. An exemplary engineer and human being.

author: Tomorokoshi
author_rank: Super Contributor
timestamp: September 15, 2018, 06:43:26 pm
content: Here is the August, 1979 Hewlett Packard Journal that features some of his work.http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1979-08.pdf
Big Iron: A REAL Nixie Power Supply  - Page 1
Forum section: electronics / general

author: johnlsenchak
author_rank: Frequent Contributor
timestamp: September 15, 2018, 05:45:20 pm
content: Big Iron: A REAL Nixie Power SupplyFran BlanchePublished on Sep 15, 2018More Power To You! In this video I get into the basics of high voltage power supply design with a heavy 175VDC powerhouse I call "Big Iron". I get into some power supply basics and show how you can make a custom high voltage supply yourself with plenty of Umph to drive whatever you want. Enjoy!
Antonov An-225: World's biggest unfinished airplane lies hidden in warehouse - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: September 04, 2018, 06:09:54 pm
content: https://www.cnn.com/travel/article/antonov-an-225-kiev-ukraine/index.html

author: RoGeorge
author_rank: Super Contributor
timestamp: September 04, 2018, 06:15:12 pm
content: https://www.boredpanda.com/abandoned-soviet-space-shuttle-program-buran-baikonur-cosmodrome-kazakhstan-ralph-mirebs/

author: Stray Electron
author_rank: Super Contributor
timestamp: September 14, 2018, 02:36:00 am
content: Quote from: RoGeorge on September 04, 2018, 06:15:12 pmDid anyone else here notice that in the picture of the cockpit interior that several of the pieces of equipment are just wooden blocks? Also looking at the various panels that have empty holes where electrical equipment goes I noticed that there's no electrical cabling inside. Based on the pictures these don't look functional shuttles, they look like half finished engineering prototypes so it wouldn't be surprising that they were abandoned when the Buran program ended.

author: Bud
author_rank: Super Contributor
timestamp: September 14, 2018, 03:36:15 am
content: The article says exactly that, one is an operational prototype, the other one is a test mock-up

author: james_s
author_rank: Super Contributor
timestamp: September 14, 2018, 03:38:40 am
content: It says right in the article that one was a prototype and one was a mockup. Wouldn't surprise me either if wiring had been ripped out by scrappers, that's a common problem with abandoned stuff anywhere.

author: lordvader88
author_rank: Frequent Contributor
timestamp: September 14, 2018, 04:12:39 am
content: I saw some big huge plane lately and from the front it looked like a huge fish with it's mouth open, or its head gone and it was gutted.I can't wait for breakfast

author: German_EE
author_rank: Super Contributor
timestamp: September 14, 2018, 06:59:03 am
content: That's just sad, I'm an engineer, I like to see things working and not rotting away in old buildings.
Keysight: Ridiculous survey questions - Page 1
Forum section: electronics / general

author: adrifromhh
author_rank: Contributor
timestamp: September 13, 2018, 12:05:49 am
content: This survey's introduction is so ridiculous:(Sent per E-Mail)https://connectlp.keysight.com/EMO-DLG3000T-3"How Do You Know the 3000T X-Series is the Right Scope for You?Please answer the following question so we can better understand yourtestneeds."*A lot of questions that have absolutely nothing todo with my personal test needs*

author: Stray Electron
author_rank: Super Contributor
timestamp: September 14, 2018, 02:03:31 am
content: Quote from: adrifromhh on September 13, 2018, 12:05:49 amA: How about making a scope that doesn't cost more than my house?

author: xrunner
author_rank: Super Contributor
timestamp: September 14, 2018, 02:10:28 am
content: Quote from: adrifromhh on September 13, 2018, 12:05:49 amSure they do. They will enable a salesman to contact you about your personal test needs, It doesn't get any more personal than that.
Fontus is bankrupt - Page 1
Forum section: electronics / general

author: Electr0nicus
author_rank: Regular Contributor
timestamp: September 11, 2018, 08:08:05 am
content: As expected, Fontus, the startup which makes the self filling water bottle, finally declared bankrupcy today. Just read it in the newspaper. They also linked in Daves videohttps://derstandard.at/2000087063932/Selbstfuellende-Wasserflasche-Umstrittenes-Start-up-Fontus-pleitehttps://www.reddit.com/r/shittykickstarters/comments/9en7h7/fontusupdate_20180910_fontus_is_bankrupt/No wonder, their concept was deemed not to work from the beginningGreetings, from AustriaGregor

author: Lord of nothing
author_rank: Super Contributor
timestamp: September 13, 2018, 07:39:48 pm
content: Who wonder...
Best tech vdeo channels on youtube: - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: September 13, 2018, 06:16:05 am
content: I'll start:(Besides eevblog you already know about that one.)Tech Ingredients:US based (Maine?) English, A guy that makes all sorts of crazy inventions. Excellent production video quality and editing. Updates frequently. Covers: Home made pumped dye lasers, jet engines, huge drones, speakers, helium, electronics and more. Guy has a HUGE budget which makes his projects almost unlimited for home based experimentsVery technical but the lay person can also understand it. 20-30 min videos. Shows you step by step for some topics like carbon fiber construction.Currently active an answers commentshttps://www.youtube.com/user/TechIngredients

author: Beamin
author_rank: Super Contributor
timestamp: September 13, 2018, 06:22:33 am
content: Photonic Induction:English UK:Not really a DIY but plays with huge mounts of electricity in his house! Most current and highest voltage on youtube. More entertainment then learning. Not active at the moment but still a classic youtube channel by now.Volts amps Kilovolts kiloamps KVA huge capacitors. Some lasers in his living room too. His love of electricity ruined his relationship for your enjoyment as he burns his girls friends furniture.https://www.youtube.com/user/Photonvids

author: Brumby
author_rank: Unknown
timestamp: September 13, 2018, 04:08:47 pm
content: Youdoknow about this thread, don't you?.....Electronic Resources - YouTube - Websites
Fed a big spider - Page 1
Forum section: electronics / general

author: lordvader88
author_rank: Frequent Contributor
timestamp: September 14, 2018, 05:11:27 pm
content: There's a spider about the size of my pinky-nail with a web outside the door. And there was an even bigger dead moth in a web that was busted by the door, so probably belonged to the spider. So I tossed the days-dead moth into the new web by the spider. It ran 2 feet away for 1 minute, turned around and went down to it and started wrapping it a little. Then I think it was biting into it to inject it. Then I came back inside. I wonder if that's still fit to eat for the spider? Its been 10-20deg C the last few days.

author: Gyro
author_rank: Super Contributor
timestamp: September 14, 2018, 05:38:25 pm
content: Spider venom liquefies most body tissue and I doubt that it's going to be struck down by Salmonella.

author: lordvader88
author_rank: Frequent Contributor
timestamp: September 14, 2018, 06:20:29 pm
content: Well I just went back outside and the spider was in about the same position, as if it had it's "mouth" on it. I wonder what it's doing. I blew up on it, just to make sure it was alive I guess, and it ran off 2 ft again. The spider never added anymore web, so it barely wrapped it up. So I guess spider's have it in their DNA not to waste silk on dead prey.As more and more animals like Cats, Dogs, Pigeons, Crows, Mice...realize we feed them sometimes for fun, the more and more will show up. What if they they try and take over and enslave us ?A little while back I had a "moment" with a Crow. I didn't even have food but I wish I did and me that crow would be friends.

author: lordvader88
author_rank: Frequent Contributor
timestamp: September 15, 2018, 06:36:55 am
content: The spider actually took the moth from about the center where I tossed it, to about 2ft from the center of the web. The moth is up at the corner of the building.The spider is sitting back, just off center, in the web

author: duak
author_rank: Super Contributor
timestamp: September 15, 2018, 06:06:25 pm
content: Dream big
Scanning electron microscope (SEM) - Page 1
Forum section: electronics / general

author: Sweet
author_rank: Newbie
timestamp: September 14, 2018, 06:55:48 pm
content: Hi everybodyI worked on various electronic system and produce prototype of them in the electronic field and by rely on empirical work.Recently I entered in Nano-electronic area which relates to development of electronic devices and components in a very small scale.My field of study is Nano-electronic and electronic but I like to work as an expert on development of SEM and I would like to gain experience and knowledge in this field. Indeed I am really determined to do this job with great enthusiasm and decided to choose my PHD course in manufacturing and design of this system.Right now I focused on studying the structure of electron microscope in order to reach a right insight and then I want to study SEM and its kinds to get familiar with all aspects of project for setting clear and precise goal to manufacture a prototype.I keep studying and researching regarding the path, in spite of all contempt I have faced so far.while tolerating all these is too painful, I am still delighted because it demonstrates the magnitude of the task I have been through.A very important point is that I don’t want to copy the similar system; moreover, I look for a great perception of designing and developing this system in a scientific way.would be so grateful if I know your point of view or recommend some books or articles which help me to have a better understanding.My email address : MohammadSajadi_68@yahoo.comhttps://www.linkedin.com/in/mohammad-sajadi-150010131/
New Old Stock - Page 1
Forum section: electronics / general

author: Roeland_R
author_rank: Regular Contributor
timestamp: September 12, 2018, 04:42:06 pm
content: The last local electronics shop in Utrecht (NL) is closing. Today I bought all 74xx and 4xxxx series ttl and cmos logic. Don't know what to do with them yet.Also the shop's clock was for sale. Have to make some room for it above my workbench.

author: GreyWoolfe
author_rank: Unknown
timestamp: September 12, 2018, 07:45:09 pm
content: Love the clock. I wouldn't mind having one myself. It would probably annoy the stuffing out of Mrs GreyWoolfe having that in my office. It would rank right up there with my 24 hour analog clock.

author: glarsson
author_rank: Frequent Contributor
timestamp: September 12, 2018, 07:52:13 pm
content: Nice clock but hate the way the month and date is displayed. No leading zeros. Just enough diodes to show 1x for the month and 1x, 2x and 3x for the date.

author: TerraHertz
author_rank: Super Contributor
timestamp: September 12, 2018, 11:39:30 pm
content: Quote from: Roeland_R on September 12, 2018, 04:42:06 pmOuch. A LOT of 4000-series CMOS (and TTL) chips dumped randomly in a big plastic Leyden Jar.Getting them out of there without any (more) static damage, into some bulk anti-static container for starters, is an interesting problem. How to equalize the charge on that pile, with ambient (including you), gently without it all passing via any single IC pins? One thing NOT to do, is just reach in and pick out ICs.I think I'd:1. Find a metal (unpainted) container big enough for the pile. Or something alfoil-lined.2. Lightly fine mist tap-water spray that pile and the inside walls of their plastic container. (Not distilled water. You want it slightly conductive.)3. Place palm flat on an inside wall of that container, spray around it.4. Wait a few moments, with palm still in place.5. Pick up that container (still with hand in contact with inside water film), touch the metal container with other hand, then tip the lot into the metal container.6. Gently warm the metal container for a while to dry off the water.Then there's the issue of how you're going to sort them out, and store compactly and static-safe for the long term.I use small manilla envelopes, holding ICs stacked in 'sticks' and foil-wrapped so the envelopes stay relatively flat. Write IC numbers on the top edge of the envelopes, find or make bulk 'drawers' to stack the envelopes in rows, by part number order. It's very compact and flexible. Also so easy to flip through to find IC numbers, that it's hardly worth making any kind of electronic stock list. Do you have 4xxx? Just look.Edit to add: My condolences on the shop closure. I know that feeling. For years I've been very happy to have a great supplier of quality nuts and bolts (including stainless steel) very close to my place. Now they are under new management. Got rid of almost all the old friendly, knowledgeable staff, and the place is going bad. Losing slow stock lines (ie rare hard-to-find sizes), imposed minimum order limit, no more cash sales, etc. All the corporate bullshit.
IS there a way to find an ISP by the generic SSID - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: September 13, 2018, 01:00:05 am
content: Did you know in 2018 in America there is internet that runs at an amazing 0.9 mbps down and (ERROR=time out) mbps uploads! Im renting a place and the SSID is PLP16 and another with a three digit two digit code ABC00. Since its so slow I'm thinking its like a spint hotspot? I tried a whole bunch of combinations in google but this internet is slow google doesn't want anything to do with it. You can get 12 mbps for 39.99 so this must being amazingly cheap.What I don't understand is at night it will slow down then the SSID will stop being seen by my computer. This is a house without a whole bunch of SSIDs around maybe five from neighbors. Why would it stop broadcasting when there isn't a whole bunch of other SSIDs around?FREE WIFI WITH YOUR RENT! Yes technically it is the internet.

author: Halcyon
author_rank: Unknown
timestamp: September 13, 2018, 02:06:16 am
content: Are you using 2.4 GHz Wi-Fi? If so, don't even bother.Can you use 5 GHz?

author: Beamin
author_rank: Super Contributor
timestamp: September 13, 2018, 02:13:33 am
content: Quote from: Halcyon on September 13, 2018, 02:06:16 amThere are a few walls in between me and where ever this router is so 5ghz will drop off fast. The wifi isn't the bottle neck this is really slow internet. Plus this router is so old/cheap and doesn't even have a 5ghz option.If you have wireless n in your laptop does that automatically mean b,g and or other previous/ older standards will work? Or do they just figure no one will use wireless b anymore?

author: NiHaoMike
author_rank: Super Contributor
timestamp: September 13, 2018, 02:27:51 am
content: Build a high gain antenna and you'll get a much better signal. Start with a "biquad" and attach it to a satellite dish if you're looking for more.

author: Beamin
author_rank: Super Contributor
timestamp: September 13, 2018, 04:03:32 am
content: Quote from: NiHaoMike on September 13, 2018, 02:27:51 amUnfortunately it's easier to just move. I like my lap tops portability. Would that be possible on most lap tops; do they have the small coax connector inside, or is the antenna built into a circuit board/module like in a cell phone?I was going to try this on an old cable modem but found there is three antennas inside and they use phasing to steer them into a directional antenna in a very complex way where you couldn't just plug a bigger full wavelength antenna into it. Much like the do with cell towers to aim them at traffic as it moves through out the day like along the highway.
Harper Nielsen - Page 1
Forum section: electronics / general

author: NivagSwerdna
author_rank: Super Contributor
timestamp: September 12, 2018, 03:29:39 pm
content: Seems like the convicts down under are causing trouble...News seems to have gone global...https://www.bbc.co.uk/news/world-australia-45495675Quite impressive for someone aged 9( If we removed all history that was considered non-PC here in the UK we would have nothing left!)

author: chris_leyson
author_rank: Super Contributor
timestamp: September 12, 2018, 04:04:36 pm
content: According to Ms Hanson ""Here we have a kid that has been brainwashed and I tell you what, I would give her a kick up the backside". Looks more like a kid who can think for herself. Good on you Harper Nielsen.
Electronic Restoration Adventure-The Belmont 636 Radio Receiver!  - Page 1
Forum section: electronics / general

author: johnlsenchak
author_rank: Frequent Contributor
timestamp: September 12, 2018, 01:06:26 am
content: Electronic Restoration Adventure-The Belmont 636 Radio Receiver!Mr Carlson's LabPublished on Sep 11, 2018Join Mr Carlson as he takes you step by step through an entire electronic restoration. Learn about RF alignment, IF alignment, oscillator alignment, electrical safety, and more. Sit back, grab your favorite snack, and enjoy! To learn more about electronics in a different and very effective way
Voltlog #180 - Vishay VHP100 Foil Resistors With Zero TCR  - Page 1
Forum section: electronics / general

author: johnlsenchak
author_rank: Frequent Contributor
timestamp: September 11, 2018, 03:36:13 pm
content: Voltlog #180 - Vishay VHP100 Foil Resistors With Zero TCRPublished on Sep 11, 2018today we’re going to be discussing a project I’ve started recently, which is a resistor reference box. I am in the process of receiving all the parts needed and so far I got the most important parts, which were kindly offered as free sample by Vishay Precision Group.
Louis Vuitton - Actively Involved in Wi-Fi Standards? - Page 1
Forum section: electronics / general

author: kfnight
author_rank: Regular Contributor
timestamp: September 10, 2018, 04:39:44 pm
content: I was looking to see if my company was a member of the Wi-Fi alliance (it's not) and right across from Logitech there's good ol' Louis Vuitton. Seems like Louis is getting involved in wearables (smart watches, etc). Not a face I was expecting to see in a sea of tech companies.https://www.wi-fi.org/membership/member-companies

author: LapTop006
author_rank: Unknown
timestamp: September 11, 2018, 04:11:26 am
content: Sometimes this happens because a company hires a key standards contributor under agreement that even if they don't plan to use the standard they'll still fund that persons contributions for a while.Of course no idea if that's the case here.
Automotive Test Equipment: Use of picometer as o'scope - Page 1
Forum section: electronics / general

author: tpowell1830
author_rank: Frequent Contributor
timestamp: September 10, 2018, 11:09:30 pm
content: I found this channel on YT where this guy does regular automotive troubleshooting and diagnostics with his meters (various) for a living. This particular video is regarding a MAP sensor on an old Ford F-150 and he shows how he used his meter to confirm his gut diagnosis, based on his experience with the symptoms. He looks at a waveform on his scope to verify the part was bad and the new part was working properly.There are many of his troubleshoot and repair videos where he uses the equipment to look at waveforms, etc. and base his diagnosis on solid electrical evidence.This is a very long one in which he and his friend use the diagnostic tools to a conclusion, but then call a friend who is more of an expert and change their diagnosis based on the learned friends experience. Warning, this is a long one.As a young man in the '60s working on cars, this type of equipment was not needed per se, since cars and motors were much simpler then, but sometimes would have been useful.

author: HwAoRrDk
author_rank: Super Contributor
timestamp: September 11, 2018, 12:43:26 am
content: If you like that then also have a look at ScannerDanner's channel on YouTube:https://www.youtube.com/channel/UCrf6f8hn5oy4alB2WXJCIqA
Space Shuttle Columbia STS-107 debris - explanation of damage - Page 1
Forum section: electronics / general

author: Stray Electron
author_rank: Super Contributor
timestamp: September 10, 2018, 06:39:13 pm
content: Pretty neat. I wonder how many millions of man-hours all of that effort took? I hope they find something better to do with the debris than they did with the debris of the 'Challenger'. That was all dumped into an old missile silo and concrete was poured in on top of it to seal it forever.

author: ogden
author_rank: Super Contributor
timestamp: September 10, 2018, 07:12:54 pm
content: Quote from: Stray Electron on September 10, 2018, 06:39:13 pmPlease don'tChallenger debris was notdumpedinto silos and concrete was notpouredon it. Silos are just "storage units" that are sealed with 5-ton concrete "cap" that can be opened if necessary. BTW thisalready happened: In 2015, NASA opened the silo and removed several pieces of Challenger's debris, so they could be placed on permanent display at the Kennedy Space Center Visitor Complex.

author: coppercone2
author_rank: Super Contributor
timestamp: September 10, 2018, 10:22:07 pm
content: why did they do that instead of just locking it in a shed? wtf or in the desert. why a damp underground shit hole?

author: GregDunn
author_rank: Frequent Contributor
timestamp: September 10, 2018, 10:33:23 pm
content: I think the people who worked in missile silos would probably object to their workplace being referred to as a "damp underground shit hole." They had to be well air-conditioned and dry to support the tons of electronics kept inside. Plus they were probably the most secure and environment-proof places in the country. Move along, nothing to see here.

author: coppercone2
author_rank: Super Contributor
timestamp: September 10, 2018, 10:42:42 pm
content: did you ever see a abandoned missile silo? How would you maintain it if its sealed by 5 tons of concrete?I watched like a 2 hour long youtube video series about some guy restoring a old silo. It most defiantly turns into a damp shit hole. Often floods completely. Especially in florida of all places.They don't age well at all. It was built to be cheap man, you need alot of them to work, and it was hard to get money for them because of the big debates between the airforce and ground rockets and then submarines.Why not just store it above ground? So much cheaper.

author: chris_leyson
author_rank: Super Contributor
timestamp: September 10, 2018, 10:53:10 pm
content: I wasted a whole Sunday afternoon watching the same series of videos, sometimes you have stop work and just chill for a bit, that's my excuse anyway. He was restoring the command and control complex and not the missile silo, that's an even bigger undertaking and the don't the US government would sell anyone an abandoned silo. Very informative set of videos if you've got nothing better to do.

author: coppercone2
author_rank: Super Contributor
timestamp: September 10, 2018, 10:54:15 pm
content: I assume it won't be much better. It just seems insane to store broke junk in a silo rather then a ware house.
Extreme Teardown of a Panasonic PT-L780U 3LCD Projector - Page 1
Forum section: electronics / general

author: johnlsenchak
author_rank: Frequent Contributor
timestamp: September 09, 2018, 05:02:12 pm
content: Extreme Teardown of a Panasonic PT-L780U 3LCD ProjectorKerry WongPublished on Sep 9, 2018In this video I did an extreme tear down of a PT-780U projector and found the optical components quite fascinating.

author: tom66
author_rank: Super Contributor
timestamp: September 10, 2018, 07:21:28 pm
content: Nice video and teardown.One of the things that fascinates me about LCD projectors is the power dissipation in the LCD panels themselves. How well do they cope with displaying black if a panel has to dissipate ~10W of optical flux, blocking all of one channel? Obviously these ones lasted fine, but I have seen some Sony 3LCD projectors fail with "blobs" on the image, possibly due to the LC becoming damaged over time.Needless to say this technology lost out to DLP, possibly because of this issue. In DLP, the power is easier to dissipate because it is usually dumped onto a heatsink, external to the DMD chip.
Creativity at the workplace - Page 1
Forum section: electronics / general

author: Gary350z
author_rank: Regular Contributor
timestamp: September 08, 2018, 08:36:17 am
content: Made me laugh.

author: SeanB
author_rank: Super Contributor
timestamp: September 08, 2018, 09:33:30 am
content: Old laptop as a keystone as well.

author: bloguetronica
author_rank: Frequent Contributor
timestamp: September 08, 2018, 11:20:39 am
content: A very nice Gothic arch!Kind regards, Samuel Lourenço

author: nctnico
author_rank: Super Contributor
timestamp: September 08, 2018, 11:24:22 am
content: Awesome!

author: Red Squirrel
author_rank: Super Contributor
timestamp: September 09, 2018, 05:26:27 am
content: Lol that's great. That must have been tricky to setup haha.

author: HwAoRrDk
author_rank: Super Contributor
timestamp: September 10, 2018, 01:49:07 am
content: Haha, nice!Shame you used a laptop as the keystone, because I was going to make a joke about whether the keystone has keystone adjustment controls.

author: RoGeorge
author_rank: Super Contributor
timestamp: September 10, 2018, 08:20:42 am
content: Not my fault (the pic is not mine).Found it posted on a Hack a Day chat room.

author: Red Squirrel
author_rank: Super Contributor
timestamp: September 10, 2018, 05:32:17 pm
content: Lol that's great I didn't even notice the laptop.
Using N Channel Mosfet Voltage rail controller by Arduino - Page 1
Forum section: electronics / general

author: malagas_on_fire
author_rank: Frequent Contributor
timestamp: September 13, 2018, 10:51:59 am
content: I'm planning to use one N Channel Mosfet 5V Voltage rail /load controller by an Arduino pin.The load itself has 200mA of current nominal 1A peak, voltage between 3.6V to 5V, so the losses may be tolerable.I first posted incorrectly on a different topic and i leave the links related to previous data to follow up what is advised:https://www.eevblog.com/forum/chat/irfz44n-mosftet-with-arduino/msg1819265/#msg1819265I have IRF540 mosfet's and i want to know if they will suit this requirements. Added a schematic draft

author: ogden
author_rank: Super Contributor
timestamp: September 13, 2018, 12:31:57 pm
content: To switch positive rails, you need P-mosfet.http://www.onsemi.com/pub/Collateral/AND9093-D.PDF

author: malagas_on_fire
author_rank: Frequent Contributor
timestamp: September 13, 2018, 03:12:35 pm
content: Thanks for the datasheet / application note it is very well documented.However the application note shows the two types for the same purpose, the Rds difference becomes almost the same for low power application, plus the P channel does not require an external source and resistor.So the P Mosfet is more suitable for switching positive rails in low power applications?

author: Zero999
author_rank: Super Contributor
timestamp: September 13, 2018, 03:58:52 pm
content: Quote from: malagas_on_fire on September 13, 2018, 10:51:59 amAccording to the schematic, you want to switch the negative rail to the load, so an N-channel MOSFET is fine.The BJT in your schematic is acting as a NOT gate, which will invert the operation: when ArduinoPin is high, the MOSFET will be off and so will the load, when ArduinoPin is low, the MOSFET will turn on, connecting the 0V side of the load to 0V and allowing current to flow.In this case, as the MOSFET is only being driven off 5V, only one resistor between the gate and +V is required, although connecting the gate to the BJT's collector, via another resistor is not a bad idea, just make sure the resistor has a very low value, compared to the other, otherwise the voltage drop will be too high.Ideally you should be using the IRL540N, rather than the IRF540N, as it's a logic level MOSFET and will be designed to turn fully on, with a gate voltage of just 5V, but the IRF540N should be adequate in this case, as the load current is under 1A.
Wanna take a look around? In 4K? 360*? ON MARS!  - Page 1
Forum section: electronics / general

author: JPortici
author_rank: Super Contributor
timestamp: September 10, 2018, 02:22:40 pm
content: but.. why on youtube?

author: Brumby
author_rank: Unknown
timestamp: September 10, 2018, 03:08:06 pm
content: To tap into a broader audience. Not everybody deliberately heads for the NASA website - but YouTube "suggestions" and search results increase potential viewer engagement.

author: JPortici
author_rank: Super Contributor
timestamp: September 10, 2018, 03:52:19 pm
content: i remember there being a google-maps-style website

author: RoGeorge
author_rank: Super Contributor
timestamp: September 10, 2018, 04:01:29 pm
content: I found this one onhttps://apod.nasa.gov/apod/astropix.html(not from YouTube recommendation).YouTube is a very powerful platform to distribute videos all over the world, in general, well, except maybe China and a few other alike countries. No download or install required, also, videos are "grouped" by channels, and channels are easy to subscribe and follow in order to see future similar content, allows comments from viewers, shows viewers rating, and so on.For this particular image, it is even more advantageous because the "movie" is an interactive view. The user can click and drag the image in order to look around in any direction, upon wish.Did I misunderstood the question, or are there better alternatives than YouTube?
I had no idea we had emojis - Page 1
Forum section: electronics / general

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 07, 2018, 06:52:44 pm
content: List here?:http://widgetsandshit.com/emojis.htmlTim

author: JPortici
author_rank: Super Contributor
timestamp: September 07, 2018, 07:06:48 pm
content: Depends on the browser/os combo i think..i.e.: firefox on my windows pc will show the emoji, on my macbook it won't.Aren't emojis in unicode anyway?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 08, 2018, 04:37:47 am
content: Unicode yes, 👍 we have that now, but note the code, these are embedded images courtesy of forum code -- not plain text!Does this really not show in Mac??? 👉Tim

author: xaxaxa
author_rank: Regular Contributor
timestamp: September 08, 2018, 07:06:40 am
content: 💩

author: Nominal Animal
author_rank: Super Contributor
timestamp: September 08, 2018, 08:01:53 am
content: Like T3sl4co1! said, those (tapatalk emojis) are images. Unicode has some, too.Quote from: JPortici on September 07, 2018, 07:06:48 pmNo. Some forums use images, or map the Unicode characters to specific images, so it depends on the forum. If Unicode emojis like 😲 are used, their visibility depends on the Unicode coverage of the font used. So, it does not really depend on the OS.On my Ubuntu 16.04.4 LTS (two years old, so not "cutting edge") system, the salient tables on the WikipediaEmoticons Unicode Blocklook like this:

author: nctnico
author_rank: Super Contributor
timestamp: September 08, 2018, 09:22:58 am
content: It's a grazy world where :-) can evolve into a standard.

author: tooki
author_rank: Super Contributor
timestamp: September 08, 2018, 10:14:50 pm
content: Quote from: T3sl4co1l on September 08, 2018, 04:37:47 amFirefox sucks. Emoji have worked perfectly on Macs in Safari and Chrome for years now.

author: HwAoRrDk
author_rank: Super Contributor
timestamp: September 10, 2018, 03:28:28 pm
content: Ugh, Tapatalk. Trusting a third-party app with forum credentials and other stuff gives me the heeby-jeebies. I wouldn't touch it with a 10 foot pole, no matter how cool their selection of emojis.Oh, and it turns out they track you and sell your location data to a third-party data monetisation company:https://guardianapp.com/ios-app-location-report-sep2018.html
Look what I found in the skip at work - Page 1
Forum section: electronics / general

author: johnh
author_rank: Regular Contributor
timestamp: September 08, 2018, 07:47:43 am
content: Found this Agilent 34980A in the skip at work. Has six 34942A 75cards.Fortunately the skip was nearly full, otherwise it probably would be more damaged than it isPower up okay. VFD is faint but still readable.4 of the cards have damaged connectors.Don't know what I going to do with it.

author: bloguetronica
author_rank: Frequent Contributor
timestamp: September 08, 2018, 11:37:25 am
content: Hi!Well, I see lots of damaged connectors, which is a shame, but I think that those can be replaced. The trouble will be finding equivalent connectors. Probably you'll have to sacrifice one of the cards for parts, but then you could restore it later.Kind regards, Samuel Lourenço

author: Gribo
author_rank: Frequent Contributor
timestamp: September 08, 2018, 10:00:06 pm
content: Aren't those standard 75 Ohm SMB connectors?

author: johnh
author_rank: Regular Contributor
timestamp: September 09, 2018, 01:22:26 am
content: From the manual 34980-9004The 34942A — the 75-variation — uses Mini SMB connectorsI might send one the cards to Dave for a tear down.

author: bloguetronica
author_rank: Frequent Contributor
timestamp: September 10, 2018, 10:28:31 am
content: Quote from: johnh on September 09, 2018, 01:22:26 amKind of a waste, but if you send one of the cards for a tear down, I suggest that you take all the good connectors first. Also, make sure that it is a defective one. Just because it will probably end up in the bin, anyway.Anyway, you own the equipment, and it is not my business what you do with it. It is just a suggestion.Kind regards, Samuel Lourenço
Repair of Accurite Indoor/Outdoor Wireless Thermometer - Page 1
Forum section: electronics / general

author: xrunner
author_rank: Super Contributor
timestamp: September 07, 2018, 01:12:27 pm
content: This small post isn't so much for the regulars here, it's more for a consumer to find Googling some day, wishing to repair a fault such as this one had. This is an Accurite Model 00782.The problem was that the outdoor temp was displaying ~106 F in a room that was nowhere near that temperature (should have been near 80 F). I have had this for years and I noticed it gradual displaying too high a temp for the outdoor sensor.After changing the batteries, and not changing the results, I decided to take apart the outdoor sensor. Upon inspection I found that some compound had "grown" between some unused SMD jumper pads, probably causing an error in the reading. I scrubbed the area with alcohol and removed the chemical growth. That fixed the problem. It's certainly back within specifications for such a consumer device which is probably +/- 10% or so.So, for you out there that aren't familiar with trying to fix electronics, you might consider taking apart the item you are about to throw away, and simply inspect it. Stick to small battery powered items like this one and other things such as toys. Hey it's worth a try isn't it?

author: onesixright
author_rank: Frequent Contributor
timestamp: September 07, 2018, 01:25:35 pm
content: Quote from: xrunner on September 07, 2018, 01:12:27 pmInteresting 😀 Any idea what that is and what caused it?

author: NiHaoMike
author_rank: Super Contributor
timestamp: September 07, 2018, 01:47:23 pm
content: Looks like it was caused by moisture since it's the outdoor sensor. Add a coat of paint or super glue to seal them up.

author: xrunner
author_rank: Super Contributor
timestamp: September 07, 2018, 02:16:50 pm
content: Quote from: onesixright on September 07, 2018, 01:25:35 pmNo idea at all. I've used it here and there for years. The odd thing is that the area where the "growth" occurred is no different than the rest of the board as far as I can tell. No idea why the growth was only in that area.Quote from: NiHaoMike on September 07, 2018, 01:47:23 pmPossibly, I used to have it in the attic, so at least high humidity. I went ahead and opened up the indoor sensor to inspect - no issues. So, good to go for a few more years.

author: onesixright
author_rank: Frequent Contributor
timestamp: September 07, 2018, 07:42:50 pm
content: Quote from: xrunner on September 07, 2018, 02:16:50 pmBut it looks like achemicalreaction, just on moist?

author: SeanB
author_rank: Super Contributor
timestamp: September 07, 2018, 08:30:39 pm
content: Probably an area with flux residue that attracted moisture from the air. Cleaned the board and got rid of it, though it really should have a small bit of masking applied to the LCD pads and then conformal coat the rest of the board with a few light coats of spray lacquer.
Altronics opened a new store at Airport West. - Page 1
Forum section: electronics / general

author: Muttley Snickers
author_rank: Unknown
timestamp: September 09, 2018, 01:00:44 am
content: Wow, how did I miss this special event ?.For those interested Altronics have recently opened a new store located at Airport West in Victoria, Australia. This is really great news for some of us as their Springvale store although very good is located on the other side of town and was a bit of a journey. I'm only ten minutes away from the local Jaycar store which I support when possible but Altronics are leaps and bounds ahead for our requirements and now only about twenty minutes away. I'm just chuffed and can't get the smile of my face.Altronicshttps://www.altronics.com.au/Altronics Airport Westhttps://www.altronics.com.au/news/altronics-airport-west-opens-september-2018/