hybridfree/eevblog-posts huggingface dataset:
If you are fed up go to Farnell Electronics and search for ooooo - Page 1
Forum section: electronics / general

author: SparkyBruce
author_rank: Contributor
timestamp: March 05, 2020, 12:54:37 pm
content: One of my colleagues found that if you search for "ooooo" (so 5 o's) on the Farnell electronics website it comes back and says something funny "did you mean …….."But only with 5 o's

author: Neil Johnson
author_rank: Newbie
timestamp: March 05, 2020, 01:02:05 pm
content: Yes it was quite amusing! I also tried "oooo" - looks like the Librarian is on their web team

author: edy
author_rank: Super Contributor
timestamp: March 06, 2020, 02:53:52 am
content: If you search "ooo" on Google you get this funny Star Trek inspired catchy music video from a band I've never heard of but now glad to have discovered:
Another good Generic Video Downloader! - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: March 06, 2020, 12:42:25 pm
content: I generally use "4K-Downloader" now for Youtube videos, but it doesn't work with 'Reddit'.I've found a new OnLine one, that works well with...Youtube, Facebook, Instagram, Reddit, Tiktok, Twitter,Twitch, Tubblr, Vimeo, Vine, VK, Weibo... flawlessly!!https://ripsave.comSimply copy/paste the URL and you are given many options for saving.
identificate component - Page 1
Forum section: electronics / general

author: k.valentino
author_rank: Contributor
timestamp: March 09, 2020, 02:22:54 pm
content: Hi, need help to identificate one component marked as 822K 6011. I need to replace it, it’s blown.

author: Zero999
author_rank: Super Contributor
timestamp: March 09, 2020, 02:37:09 pm
content: It's a capacitor. The first two digits represent the value in pF, with the last digit, the number of zeros, so that's 82 00pF, or 8.2nF and K means 10% tolerance.https://www.engineering.com/ElectronicsDesign/ElectronicsDesignArticles/ArticleID/16388/How-to-Interpret-Capacitor-Markings.aspx

author: k.valentino
author_rank: Contributor
timestamp: March 09, 2020, 02:57:38 pm
content: Quote from: Zero999 on March 09, 2020, 02:37:09 pmIs it without polarity?

author: Zero999
author_rank: Super Contributor
timestamp: March 09, 2020, 03:03:09 pm
content: Quote from: k.valentino on March 09, 2020, 02:57:38 pmYes. The low value (under 1µF) and lack of a polarity marking, indicate it's non-polarised.

author: gamalot
author_rank: Super Contributor
timestamp: March 09, 2020, 03:09:05 pm
content: I think it is a 8.2uH chip inductor from TDK(EPCOS).https://www.tdk-electronics.tdk.com/inf/30/db/ind_2008/b82422a_100.pdf

author: gamalot
author_rank: Super Contributor
timestamp: March 09, 2020, 03:19:28 pm
content: Found a lot of similar pictures on Taobao, now there is no doubt that it is the inductor produced by EPCOS.

author: k.valentino
author_rank: Contributor
timestamp: March 09, 2020, 03:29:47 pm
content: ThanksZero999andgamalot!Yes, it really looks like it's a inductor

author: Zero999
author_rank: Super Contributor
timestamp: March 09, 2020, 04:25:08 pm
content: Quote from: gamalot on March 09, 2020, 03:09:05 pmThanks. I feel a little bit embarrassed for suggesting it was a capacitor. I've not seen an inductor which loos like that though.Quote from: k.valentino on March 09, 2020, 03:29:47 pmI was going to suggest testing for continuity to confirm it's an inductor, but the part is bad, so it will probably be open circuit.

author: gamalot
author_rank: Super Contributor
timestamp: March 09, 2020, 04:56:46 pm
content: Quote from: Zero999 on March 09, 2020, 04:25:08 pmYes I does really look like a capacitor.
Digi-Key Bugged? - Page 1
Forum section: electronics / general

author: T3sl4co1l
author_rank: Super Contributor
timestamp: March 04, 2020, 03:59:31 pm
content: This is... interesting:Not sure if anyone else is seeing it, or, for that matter, how DK's website is set up. If they have distributed servers, it might just be the one near me that's going batty.If it's their fault I'm sure they'll fix it quickly, I'm not worried, more amused. Just about every category looks like this right now, all sorts of columns crossed and mixed up.Tim

author: madires
author_rank: Super Contributor
timestamp: March 04, 2020, 04:07:34 pm
content: A tad too high for hardware debouncing.

author: cvanc
author_rank: Frequent Contributor
timestamp: March 04, 2020, 04:16:58 pm
content: Yeah the fields of the database are totally bonkers. I just tried to search for an electrolytic and got incomprehensible results.

author: 1Ghz
author_rank: Unknown
timestamp: March 04, 2020, 04:18:22 pm
content: Same here.btw, PIC10F322 1.33GHz? Wow!

author: Ice-Tea
author_rank: Super Contributor
timestamp: March 04, 2020, 04:22:55 pm
content: 0.07$ for that microswitch? I think you should buy a few thousand, no?
AoEX Fig 9x.87: Voltmeter not on sense terminals ? - Page 1
Forum section: electronics / general

author: bsdphk
author_rank: Regular Contributor
timestamp: March 04, 2020, 11:02:28 am
content: In the top left corner of the full schematic (Fig 9x.87) for the "laboratory dc power supply", the voltmeter is shown connected between the +OUT and -OUT terminals.That makes no sense to me.The meter should show the voltage at the point of load, excluding the wire-loss to get there, so it should be connected across the +SENSE and -SENSE terminals.
Unknown component - Page 1
Forum section: electronics / general

author: Riccardo_Tommasin
author_rank: Contributor
timestamp: March 03, 2020, 06:17:54 pm
content: Hi, does anyone know what this component is ??

author: Gyro
author_rank: Super Contributor
timestamp: March 03, 2020, 06:29:48 pm
content: It's a very early RCA Opamp, built with discrete components and then potted.

author: Riccardo_Tommasin
author_rank: Contributor
timestamp: March 03, 2020, 07:02:59 pm
content: Any ideas where i can find the datasheet ?

author: chickadee
author_rank: Contributor
timestamp: March 03, 2020, 07:29:59 pm
content: Google has been vacuuming up every single book in existence, I have seen some very old databooks on there. Not sure, you might need a google play subscription to read them, but it's worth a look - I have seen the 1960's motorola databooks so the RCA/GE ones might be there too.
tektronix tas475 0scilloscope - Page 1
Forum section: electronics / general

author: cuda340
author_rank: Newbie
timestamp: March 04, 2020, 06:15:25 pm
content: HELLO EVERYBODY,I RECENTLY PURCHASED A TEKRTRONICS TAS475 OSCILLOSCOPE AND AM LOOKING FOR A PDF DOWNLOAD MANUAL.IF ANYONE CAN HELP ITWOULD GREATLY APPRECIATED

author: StillTrying
author_rank: Super Contributor
timestamp: March 04, 2020, 07:55:37 pm
content: THERE'S SOME INFO AND MANUALS HEREwww.valuetronics.com/product/tas475-tektronix-analog-oscilloscope-usedThe TAS455, TAS465, TAS475 and TAS485 are four very similar analog scopes introduced in the mid-90s. They all have a readout system, cursors and digital controls.http://w140.com/tekwiki/wiki/TAS465

author: GreyWoolfe
author_rank: Unknown
timestamp: March 04, 2020, 11:27:59 pm
content: Please don't yell, it hertz my ears.

author: james_s
author_rank: Super Contributor
timestamp: March 05, 2020, 07:12:47 am
content: Is there something wrong with your caps lock key and spell checker?
Titan Missile Museum: Butterfly Valve Lock Control System - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: March 03, 2020, 07:33:31 am
content: Titan Missile Museum is cool to begin with.Many cool additional videos on the link below.https://www.youtube.com/user/titanmissile/videosTwo good videos on the "Butterfly Valve Lock Control" security system on the Titan II.
What is the purpose of the IC in this SLR lightmeter circuit?   - Page 1
Forum section: electronics / general

author: julian1
author_rank: Frequent Contributor
timestamp: March 02, 2020, 08:43:00 pm
content: Schematic is the light-meter for a circa 1998/2000 slr camera.What is the function of the 10 pin IC within J100. Is it analog switch?, level adjust, switchable comparator?, analog sample-and-hold? Is it likely a custom part?- SOUT (pin 5) connects to what appears to be a light dependent resistor.- The analog signal is connected to the microcontroller ADC (AN0).- SEL1, SEL2, SEL3 are uncertain select/switch functions driven by MCU gpio.

author: Zero999
author_rank: Super Contributor
timestamp: March 02, 2020, 09:31:30 pm
content: Please post the complete circuit. It appears to be a sample and hold circuit.Q1 is a FET, probably low power MOSFET, but I couldn't find a sane data sheet.

author: julian1
author_rank: Frequent Contributor
timestamp: March 02, 2020, 10:30:22 pm
content: The complete analog section is shown.I believe Q1 (pchannel fet connected to body/rail VDD) just allows the microcontroller to power on/off the analog section as a whole. Eg. by pulling AVDDCNT and the mosfet gate low to turn on.Edit. I think there is some kind of integration/negative feedback with AOUT,AIN,SOUT around what looks like a light dependent resistor.Edit 2. I now suspect the 10 pin IC is just level shifter - to bridge the digital voltage levels of the GPIO select pins to the analog circuit. eg. pull SOUT high - to get a LDR reading at the ADC. pull the AOUT or AIN high to get reference voltage levels at the ADC.
Brick and mortar store to close: Tanner Electronics - Page 1
Forum section: electronics / general

author: rsjsouza
author_rank: Super Contributor
timestamp: March 02, 2020, 08:24:07 pm
content: Dallas - Fort Worth areaI just saw an announcement thatTanner Electronicsin Carrolton will close June 1st.They are an absolutely wonderful family owned store and with an admirable selection of vintage parts and equipment.They mentioned last year they were looking for a new place to move their store and announced today they will be closing for good.It is quite sad to see this simply vanish like many others. Anancient threadtalking about them.
How rockets are made (ULA) - Page 1
Forum section: electronics / general

author: eti
author_rank: Super Contributor
timestamp: March 01, 2020, 02:56:19 am
content: https://youtu.be/o0fG_lnVhHwIt's a blessed relief that there exists a 0.0000000000000001% of ACTUAL, REAL science channels on YouTube, from ACTUAL scientists and engineers who do actual elbow grease for a living, and share the fruits of their labour with the world.

author: Domagoj T
author_rank: Frequent Contributor
timestamp: March 01, 2020, 07:15:06 am
content: This is the part you're not supposed to see, as demonstrated by the stir welding machine manufacturer themselves
What's inside a cheap rechargeable drill & it's charger? - Page 1
Forum section: electronics / general

author: Gyro
author_rank: Super Contributor
timestamp: February 28, 2020, 11:47:08 am
content: That's truly awful for $45 (US?), especially with such a blatant lie printed on the outside of the battery pack!Wait for a Lidl or Aldi specialbuy. Vastly better quality, truthful specs and properly approval tested!
Freeman Dyson (Dyson sphere guy) has passed - Page 1
Forum section: electronics / general

author: bsudbrink
author_rank: Frequent Contributor
timestamp: February 28, 2020, 10:49:27 pm
content: May he rest in peace.https://www.space.com/freeman-dyson-dead-at-96.html

author: donotdespisethesnake
author_rank: Super Contributor
timestamp: February 29, 2020, 02:29:04 pm
content: One less climate change denier to worry about.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: February 29, 2020, 02:56:47 pm
content: Quote from: donotdespisethesnake on February 29, 2020, 02:29:04 pmGet your facts straight."While he did not dispute that human emissions were causing Earth's climate to warm, he expressed frustration with the tone in which the subject was discussed at the time, as The New York Times reported in 2009. Dyson suggested that other problems were more important and expressed doubts about some techniques used by climate scientists to estimate the effects of future warming. "
Hacking a RFID System With The ESPKey - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: February 29, 2020, 06:10:04 pm
content: We use this at Home:https://www.evva.com/int-en/products/electroniclockingsystemsaccesscontrolsystems/airkey/Any idea for an non destructive hack?
Byte Magazine collection from 1975 to 1989 - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: February 26, 2020, 09:13:22 pm
content: https://www.reddit.com/r/opendirectories/comments/f9s434/byte_magazine_old_issues_in_pdf_from_1975_till/

author: rsjsouza
author_rank: Super Contributor
timestamp: February 26, 2020, 09:37:50 pm
content: IIRC someone had shared a similar thing around here, but I can't find the thread.At any rate, many thanks for sharing! It is quite a journey.

author: Gyro
author_rank: Super Contributor
timestamp: February 26, 2020, 09:48:56 pm
content: You can also find them onhttps://www.americanradiohistory.com/Together with the treasure trove of other stuff.
Converting PCB to point to point - Page 1
Forum section: electronics / general

author: Excavatoree
author_rank: Frequent Contributor
timestamp: February 27, 2020, 01:10:13 am
content: Please forgive me if this has been discussed. I tried searching, but if I screwed up, please delete.I was surprised enough that someone would waste time removing components from a PC board and re-building a commercial amplifier to be "point-to-point," but the real facepalm was using the soldering gun on a PCB.For the record, I might agree with hard mounting the tube sockets and running leads to the PCB, if that's necessary, but why turn an easy to repair PCB amplifier into a rats nest for some nebulous "sonic improvement?"Again, forgive me if this has been posted before and discussed.

author: 0culus
author_rank: Super Contributor
timestamp: February 27, 2020, 01:54:18 am
content: It's a "vintage" thing. A lot of "custom shop" guitar amps come with p2p wiring so they are just like the original. Yes, they are expensive. No, it probably makes zero difference in the toanz. My favorite amp is my little Egnater 15W head. It's got the tubes, but it's built on a PCB and it sounds great. And it + a 12" speaker cab is light enough to reasonably carry with me when I want to go jam with friends.

author: james_s
author_rank: Super Contributor
timestamp: February 27, 2020, 05:26:58 am
content: There's no point in looking for logic when it comes to this sort of audio stuff.If I were building a tube amp from scratch I'd probably build it point to point just for fun, but I'm sure not gonna take the parts off a PCB that's already built.

author: Berni
author_rank: Super Contributor
timestamp: February 27, 2020, 06:21:24 am
content: Yep vintage design style and nothing more.All the old amplifiers and radios and all used to be built like this just because circuit boards have not gained popularity yet. These devices ware really expensive anyway so it justified paying someone to put it together by hand. Then as technology marched on they found out PCBs can drastically speed up the assembly process and later on the process being automated entirely with pick and place machines for even higher production speeds.This style of construction can still look beautiful in its own right. There are some old electronics where they have taken careful planning out of the component layout while the guy assembling it has taken care to bend the component leads nice and carefully, loom the cables together by hand, make each cable exactly to length, a true work of art. But is still annoying to troubleshoot and repair compared to a PCB
Outdoor house illumination - Page 1
Forum section: electronics / general

author: riacob
author_rank: Newbie
timestamp: February 26, 2020, 12:57:54 pm
content: Hi everyone, I'm new to the forum.I need to light up a wall of an house at night, with one led floodlight.How can I calculate the lumens needed in order fot that to work and nicely light up the wall?Here is a quick sketch of the house:https://pasteboard.co/IWt9HrM.bmp(yellow-outlined area is the area i need to light up).The wall is about 15m long, and the floodlight would be about 15m away from the house.Is that possible or would it need a power so high that id doesn't even exist?
Dubioza kolektiv - InMove by Gaël LANGEVIN and other spots :) - Page 1
Forum section: electronics / general

author: nardev
author_rank: Unknown
timestamp: February 25, 2020, 03:41:23 pm
content: Interesting, InMoov by Gaël LANGEVIN reproduced by students at El.Engineering Faculty in sarajevo, Bosnia. Acting in a spot of Bosnian band Dubioz Kolektiv.Here is the story how they have created it:https://www.bhfuturesfoundation.org/news/2020/1/31/our-scholars-participated-in-making-of-robby-megabyteThe same band had very catchy song about the pirate bay too, very very interesting spot.sadly, not many songs by Dubioza is in English, but you can find more if you like that style of music.

author: maginnovision
author_rank: Super Contributor
timestamp: February 25, 2020, 06:17:38 pm
content: Not the best inmoov I've seen but I'm not that interested in art projects.

author: nardev
author_rank: Unknown
timestamp: February 26, 2020, 05:25:19 am
content: Well, actually the story goes like this. The Band didn't know how to make one so they went to a faculty of el.eng. and asked if that would be possible to make. The professor over there realized that it would be great learning platform and in fact it was. Student are still learning, adding segmenta, programming parts etc. It's undergraduate project so there is plenty to lear for those kids.

author: maginnovision
author_rank: Super Contributor
timestamp: February 26, 2020, 06:17:15 am
content: At my robotics club people were pretty interested for a couple years but after 4 or 5 were made I think people got bored of them.

author: nardev
author_rank: Unknown
timestamp: February 26, 2020, 07:09:41 am
content: Heh the students clubs are usually getting new members every year. Makes things easier
how many views on youtube to make $120nzd - Page 1
Forum section: electronics / general

author: nvidia
author_rank: Regular Contributor
timestamp: February 25, 2020, 05:09:16 am
content: my friend wanted to the amount of video views his channel need where he would be guaranteed to make $120nzd a month

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: February 25, 2020, 05:18:16 am
content: www.socialblade.comhttps://socialblade.com/youtube/channel/UC2DjFE7Xf11URZqWBigcVOQQuite a few, I'd say

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: February 25, 2020, 05:35:44 am
content: Quote from: nvidia on February 25, 2020, 05:09:16 amDepends on various factors such as CPM, CTR, etc., and there's noguaranteednumber (especially if he gets demonetised for any reason ... or indeed no reason at all).Ballpark figure is 5,000 views per day, or fewer if he looks cute in a dress.

author: blacksheeplogic
author_rank: Frequent Contributor
timestamp: February 25, 2020, 07:00:03 am
content: Quote from: I wanted a rude username on February 25, 2020, 05:35:44 amThe modern pro-noun is she not he.... unless they are gender fluid in which case I'm not sure.

author: TERRA Operative
author_rank: Super Contributor
timestamp: February 25, 2020, 10:21:50 am
content: I get a bit more than you are asking about, and I get a little over 56 thousand views a month.Your milage will vary with CPM and whatever other metrics the algorithm uses.
How to get the old mobile forum design? - Page 1
Forum section: electronics / general

author: BiasedAmpere
author_rank: Newbie
timestamp: March 02, 2020, 05:25:47 am
content: How to get on mobile to get the old theme and design?

author: ataradov
author_rank: Super Contributor
timestamp: March 02, 2020, 05:54:10 am
content: I don't think it is possible. And I agree, new one sucks.

author: tautech
author_rank: Super Contributor
timestamp: March 02, 2020, 06:37:34 am
content: Discussion here:https://www.eevblog.com/forum/news/forum-mobile-site-updated/
History always repeats. - Page 1
Forum section: electronics / general

author: Karel
author_rank: Super Contributor
timestamp: February 24, 2020, 12:03:11 pm
content: The web is 'optimised for Chrome, not for independent browsers'https://www.theregister.co.uk/2020/02/20/mozilla_eu_internet_regulation/

author: Karel
author_rank: Super Contributor
timestamp: February 24, 2020, 12:06:21 pm
content: Chrome deploys deep-linking tech in latest browser build despite privacy concerns.It's not a bug, it's a feature, explains the Chocolate Factoryhttps://www.theregister.co.uk/2020/02/20/chrome_deploys_deeplinking/

author: tggzzz
author_rank: Super Contributor
timestamp: February 24, 2020, 12:36:07 pm
content: History doesn'trepeat.History doesrhyme.

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 24, 2020, 02:59:15 pm
content: Quote from: Karel on February 24, 2020, 12:06:21 pmAny organization, no matter how big or small it is (applies to even individuals) will usually try relentlessly to optimize how it functions and how much of its environment it has an influence on. Even bacteria and viruses do that. I think it all comes down to that.So yes of course, all attempts to "grow" will IMO never end. It's the battle of life. Not trying to be too philosophical here - just very basic actually. And the same "approaches" for growing attempts are bound to be reused again and again - sometimes with variations of course - exactly as we can observe for any form of life. In that respect, yes, similar things will tend to occur again and again.The big picture for Google (and similar companies) is exactly that IMO. They are just constantly expanding, sometimes (or most of the time) at the expense of other people/organizations. Regulations are a bit like fighting a virus so it doesn't spread so much as to be a hazard for our future - but exactly like with viruses, it's a never-ending fight, and the more influence big companies acquire, the harder they become to regulate.Oh, and just like with viruses, the only thing you can do on an individual basis to limit the expansion is just not to contribute propagating it. So don't use Chrome, and limit your use of Google services in general. It's not a stab at Google per se - I don't think Google is inherently "bad" - it's just gotten big enough that its influence can now become a hazard to us, and even Google can't do much about it IMO. The only way to reverse the trend would be if Google split up in several smaller and fully independent organizations to get things back to a situation in which their individual influence is contained.And interestingly, "It's not a bug, it's a feature," is exactly how a virus could be described, so I like this parallel.
Where did that one section go? - Page 1
Forum section: electronics / general

author: Ben321
author_rank: Frequent Contributor
timestamp: February 27, 2020, 12:18:47 am
content: There used to be a section on here to talk about fake products (like quack medical devices), but I can't find that section now.

author: thm_w
author_rank: Super Contributor
timestamp: February 27, 2020, 12:23:01 am
content: https://www.eevblog.com/forum/dodgy-technology/
Dave!  How about a video on Fake Chips - Page 1
Forum section: electronics / general

author: bruceathompson
author_rank: Newbie
timestamp: February 24, 2020, 12:02:39 am
content: Saw this the other day and thought, DAVE, you need to do thisThanks!

author: boB
author_rank: Frequent Contributor
timestamp: February 24, 2020, 01:35:45 am
content: Very interesting !And another geek channel on YT I did not know about !Thanks !

author: MrMobodies
author_rank: Super Contributor
timestamp: February 25, 2020, 01:28:05 pm
content: It reminds me of something that happened to Dave and he did a video ofFairchild SemiconductorsFTDI bricking a lot of suspected counterfeit chips through the driver updates in video EEVblog #676 - RANT: FTDI Bricking Counterfeit Chips!Edit:Oops I confused the two manufacturers.

author: wraper
author_rank: Unknown
timestamp: February 25, 2020, 01:41:44 pm
content: Quote from: MrMobodies on February 25, 2020, 01:28:05 pmFairchild and FTDI have nothing to do with each other.QuoteThrough the method they were bricked, its impossible to brick genuine chip. They simply wrote to EEPROM with a width that the real devices ignore. So bricked chips were 100% counterfeit.

author: coppice
author_rank: Super Contributor
timestamp: February 25, 2020, 01:46:09 pm
content: Why would Dave want to make a video on fake chips? Several people on YouTube have seriously researched the topic and made reasonable videos. I'm not aware of Dave having any specific expertise on the topic. A lot of the interesting experience many of us have with fake chips are things we can't really talk about, because companies don't want publicity about the problems they have had.

author: TK
author_rank: Super Contributor
timestamp: February 25, 2020, 02:21:09 pm
content: I agree with coppice, Dave does not seem to be involved in lots of projects and ordering large number of chips from China to encounter fake ones to make a video. He just does mailbag and teardown stuff... and a couple of custom products.

author: Karel
author_rank: Super Contributor
timestamp: February 25, 2020, 02:43:05 pm
content: Quote from: wraper on February 25, 2020, 01:41:44 pmActually, the counterfeit chips were not really bricked. They were just temporary put out of service. The problem can be corrected by writing the correct values to the eeprom in the chip.The term bricked is used when a device is damaged or rendered inoperative beyond repair.

author: AlfBaz
author_rank: Super Contributor
timestamp: February 25, 2020, 02:53:23 pm
content: Quote from: Karel on February 25, 2020, 02:43:05 pmFixed that for you as unbricking is a thing

author: schmitt trigger
author_rank: Super Contributor
timestamp: February 25, 2020, 03:39:57 pm
content: Although I agree there are already several Youtube videos dealing with counterfeit components, I really enjoy Dave's way of explaining things.Very much, I should add.Such that if he decides to do a video on the subject, I would definitively watch it.
Nice Science Kit - Page 1
Forum section: electronics / general

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 19, 2020, 02:16:35 pm
content: https://www.orau.org/ptp/collection/atomictoys/GilbertU238Lab.htmThose were the days...

author: Cyberdragon
author_rank: Super Contributor
timestamp: February 19, 2020, 05:12:29 pm
content: We've seen this upteen times...
KSGER T12 soldering station tip grounding - Page 1
Forum section: electronics / general

author: michalwu
author_rank: Newbie
timestamp: February 20, 2020, 10:40:15 am
content: Hi Guys,I am going back to electronics after 10 year break. I do have soldering station (937+, hakko clone) but I'd love to have T12 KSGER. I am tempted to buy kit without PSU since this part has its serious security issues. I'd just use some lenovo 20V PSU.Considering this setup, what about ESD security? Sure I can connect tip to ground via 1Mom resistor. But what about leakage current?Or should I use PSUs outer part of barrel plug as ground for tip?mike
IP65-IP67 low cost electronics box - suggestions? - Page 1
Forum section: electronics / general

author: Martin F
author_rank: Regular Contributor
timestamp: February 19, 2020, 02:53:18 pm
content: Hi all,We're looking to source a fairly low cost IP65-IP67 plastic box (e.g. a junction box), ideally with a transparent top cover.I've scoured Alibaba and various other pages, but I struggle getting the dimensions right.The attached picture shows roughly what dimensions we're looking for and what we're trying to do.Basically, we're looking to offer the box as a low cost optional add-on for our existing data logger product. To do so, we were hoping to find a standard-size box that is as compact as possible, while still allowing the end user to insert/extract our product from the box.Our product has 2 x DB9 connectors which are not IP67. Our thinking is to create a small PCB with 2 x regular DB9 connectors on the lower side and 2 x IP 67 DB9 connectors on the upper side. This would be added inside the junction box to serve as a "gateway" for the device to the outside of the box.Note that it's not possible for us to easily create a variant of the product that is IP67 without the outside box because the footprint of existing IP67 DB9 connectors take up too much space on our PCB, which would require also a custom PCB for this purpose (which is outside the scope for now).1) If any of you have good suggestions for standard boxes or where to look for these, let me know2) If you have alternative ideas for the setup, we're also interestedThanks!

author: peter-h
author_rank: Super Contributor
timestamp: February 19, 2020, 04:51:35 pm
content: The first thing to decide is whether it needs to be airtight i.e. moisture proof.That is very hard to achieve and you need IP68, and a strong box with stiff sides to make sure the o-ring seals are properly compressed.Below that, there are loads of boxes on the market. Or you can get tooling made in china for a few k.
Neutrions Energy - Page 1
Forum section: electronics / general

author: ats3788
author_rank: Contributor
timestamp: February 16, 2020, 05:33:33 pm
content: Hello my Elektronic friendsI watch a show about Neutrino Energy and it hurts so much the Problem I try to prove that this is just BS, Please help me for well explained arguments.Have a good one

author: Nominal Animal
author_rank: Super Contributor
timestamp: February 16, 2020, 07:48:08 pm
content: Neutrinosonly interact viaweak nuclear forceand gravity.This means that to neutrinos, matter and electromagnetic fields are basically irrelevant. Ten meters of lead, or a single sheet of tissue paper, or voltages enough to create lightning meters long, or magnetic fields stronger than our best experiments, is all useless: the neutrinos will just pass through, because they do not interact.(And unless we use a significant fraction of the total mass of the planet Earth to build a machine to slightly deflect a neutrino here and there, there is nothing we can do with gravity.)Claiming to develop devices for catching neutrinos -- even converting them to usable energy somehow -- is exactly as believable as someone claiming they can control clouds with their mind. The two interact just about as much, you see: ones mind and the clouds, as neutrinos and matter and electromagnetic fields. There is no connection, no interaction, just unrealistic beliefs.It is just a scheme to part fools and their money.

author: daqq
author_rank: Super Contributor
timestamp: February 16, 2020, 07:52:51 pm
content: Name the particular show.see:https://www.eevblog.com/forum/dodgy-technology/energy-from-neutrinos!!!/1) The neutrino flux through a square meter of the Earth way less than 1W/m2. That's orders of magnitude lower than classic solar power.2) At the present there is no technology that is capable of catching neutrinos aside from a real crapton of mass.Until anyone solves 2. there is no point in theoretizing about powering stuff via neutrinos. Once 2. is solved there will be no point in powering stuff via neutrinos due to 1.

author: Nominal Animal
author_rank: Super Contributor
timestamp: February 16, 2020, 08:04:43 pm
content: Another good analogy could be a device that converts birdsong into usable energy.The only way we can even detect neutrinos is to use really, really sensitive devices shielded from everything else; much like those anechoic chambers where it is so quiet you can hear your own blood flow through your veins.FWIW, solar irradiance on sea level on Earth is on the order of 1,000 W/m2, or a thousand times the energy of neutrinos passing through.

author: ats3788
author_rank: Contributor
timestamp: February 19, 2020, 10:50:33 am
content: Thank you guys I wonder why even smart people believe this BS

author: Brumby
author_rank: Unknown
timestamp: February 19, 2020, 11:18:30 am
content: Because they are not smart in those areas.But you don't even need to be smart to pick up the BS. Usually you just need to be savvy enough to check the basics - but a good con man will sell you a story that will sound good enough for you to not even suspect you need to.
Yamaha AV Receiver is dead - Let me intro myself - Page 1
Forum section: electronics / general

author: iperez_genius
author_rank: Newbie
timestamp: February 16, 2020, 12:08:59 pm
content: Hi, my name is Ilan.I have recently started arduino projects. I am a programmer and want to get into hardware. During the course I am taking for the projects my AV receiver for the sourround sound system suddenly stopped working.I thought...I can fix this. I have a multi meter how hard can it be to diagnose. Well as you can all imagine, not easy for me at least.I tried to follow this videoas my machine is very similar to this one even though the model is different. So this is where I am at. I am trying to self teach and self repair but really need mentoring. I will go through some of the course and tutorials online.Are there meet up or people in Sydney Aus, who will be willing to teach me how to analysis this device? I could send it off for repair (not worth the cost) or throw it out and by a new receiver (only $185) but I really want to understand how to work this out.Let me know if anyone is interested in mentoring. Anyway that is who I am and how I arrived here.

author: jeremy
author_rank: Super Contributor
timestamp: February 16, 2020, 12:46:55 pm
content: Hi,I’m not near Sydney, so I cannot help in that regard. But perhaps if you provided some more details about your receiver (model number in particular) and a more specific set of symptoms/observations then someone might be able to point you in the right direction.

author: tooki
author_rank: Super Contributor
timestamp: February 16, 2020, 12:50:16 pm
content: Going by the posts on the forum (in the Repair section), Yamaha receivers seem to have a lot of power problems. Looking for those threads might give you some good starting points.

author: iperez_genius
author_rank: Newbie
timestamp: February 17, 2020, 09:36:12 am
content: Jeremy thanks! The receiver I have is an MTR-3064. The device wont power on at all.I am happy to take instructions on what points to check for what voltages etc. I have attached two photos. The top and bottom of the power board.Let me know what the first steps are to checking this. I have prodded and poked my multimeter but without structure and understanding what output I should expect I have no idea how to see what is wrong.

author: iperez_genius
author_rank: Newbie
timestamp: February 17, 2020, 09:37:00 am
content: I have also looked in the repair section. Couldn't find much. Maybe I am not looking properly.

author: shakalnokturn
author_rank: Super Contributor
timestamp: February 17, 2020, 10:33:31 am
content: Start by checking you have something in the range of 9V DC at C1501, this will be fed (possibly after a 5V or 3.3V regulator) to the microprocessor. The microprocessor in turn is meant to activate main power supply through "PRY" line, Q1501, SW151 (relay).

author: tooki
author_rank: Super Contributor
timestamp: February 17, 2020, 12:03:54 pm
content: Quote from: iperez_genius on February 17, 2020, 09:37:00 amEh, it’s not you, the forum’s built in search kinda sucks. Try this instead: googlesite:eevblog.com yamaha receiver
When is an differentialen ADC worth it? - Page 1
Forum section: electronics / general

author: implor
author_rank: Regular Contributor
timestamp: February 16, 2020, 01:26:02 pm
content: What is your decision process?Assuming you have an single ended source and ADC is on same PCB.Say that requires resolution is 0.1% and Vref is 1.2V.Is it worth the extra cost?

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 16, 2020, 02:07:09 pm
content: Agreed. Note that many high-res ADCs will have differential inputs anyway (usually starting with 16-bit, and even more common at 24-bit) to meet their rated specs. So you don't necessarily have a choice. You may of course still drive them single-ended, but with extra care and as blueskull said, never without proper additional filtering and a pretty limited bandwidth.
Another YouTube oddity, or something odd going on with my machine? - Page 1
Forum section: electronics / general

author: Ranayna
author_rank: Super Contributor
timestamp: February 15, 2020, 05:47:32 pm
content: Hi,today, two BigClive Videos where shown to me on the Youtube homepage, that i do not think that i have seen before, both being somewhat oder videos.But very oddly, both do not have any sound. And yes, i am sure that i have not muted the Player, nor the browser tab.Other Videos work fine, regardless of age, just those two BigClive videos have shown this behaviour so far.So either my newely installed Windows 10 box has some very wierd problem, or Youtube borked something...These are the two videos:Do these have sound for you?Given BigClive's general content, i cannot imagine that he was muted due to copyright...EDIT: I was not aware the the embedding was automatic here... The embedded videos also do not play sound for me.

author: SilverSolder
author_rank: Super Contributor
timestamp: February 15, 2020, 05:49:33 pm
content: both have sound

author: NiHaoMike
author_rank: Super Contributor
timestamp: February 15, 2020, 05:54:55 pm
content: I think he mentioned something about the audio format he uses decodes to the center channel, so there is no sound if your audio setup is configured to use a center speaker if there isn't one installed.

author: Ranayna
author_rank: Super Contributor
timestamp: February 15, 2020, 06:03:19 pm
content: Wow, indeed something going on with my local sound settings. Wierd.I use Headphones, have always used Headphones. Those are also Configured as Headphones in Windows 10. I have not yet installed the Realtek Sound Manager software that would allow me to fiddle around with the channels, because i thought i did not need that anymore.Anyway, just fiddling around, i enabled "Spatial Sound (Windows Sonic for Headphones)" with the video running in the background, and suddendly: Sound!Thank you, i would *never* have expected that to matter.EDIT: To complete my confusion: I turned that Spatial Sound thing off again, because other stuff sounded wierd with it on. And now the audio for those two videos still plays

author: SilverSolder
author_rank: Super Contributor
timestamp: February 15, 2020, 08:04:15 pm
content: It all comes free with each PC (Personal Confuser!)

author: NiHaoMike
author_rank: Super Contributor
timestamp: February 15, 2020, 10:50:24 pm
content: What I find strange is why does it seem like only Big Clive is affected.

author: Cyberdragon
author_rank: Super Contributor
timestamp: February 16, 2020, 04:29:09 am
content: Quote from: NiHaoMike on February 15, 2020, 10:50:24 pmHe records mostly on smartphones, so I bet other channels with mobile recordings could be affected as well (possibly could be the model of phone too).
Panavise 350 jaw dimensions - Page 1
Forum section: electronics / general

author: Helix70
author_rank: Unknown
timestamp: February 14, 2020, 12:41:41 pm
content: Can anyone with a Panavise 350 tell me what size the metal jaws are (the part that the neoprene soft jaws slide over).I have a vise from a company called Royston Electronics that is about 40 years old and the jaws are stuffed. The Panavise ones look real similar.The metal jaws on my vise are 38.1mm wide x 4.8mm thick (1.5 inches x 0.19 inches).

author: aargee
author_rank: Frequent Contributor
timestamp: February 14, 2020, 10:21:32 pm
content: I have an old Panavise here and it's roughly (in dim light with a steel rule) 37.5 x 4.5mm - so I imagine its pretty much the same. Royston may have just re-badged the Panavise gear?The clamp material looks to be stamped out of steel plate.

author: Helix70
author_rank: Unknown
timestamp: February 14, 2020, 10:31:07 pm
content: Thanks for that, sounds close enough. I might buy a set of neoprene soft jaws from Panavise to see if they fit.

author: Gregg
author_rank: Super Contributor
timestamp: February 15, 2020, 12:42:13 am
content: Panavise 350 Jaws are 37.8mm wide x 4.56mm thick and 44.6mm tall (height where the rubber cover slides over the jaw) Width is +/- 0.5mm because the steel jaw pieces are sheared with rough edges. Measurements taken with a genuine Mitutoyo digital caliper.

author: Helix70
author_rank: Unknown
timestamp: February 15, 2020, 07:10:08 am
content: Thanks Greg. Sounds like I can make it work.
Chinese Electronic Engineer with good english - Page 1
Forum section: electronics / general

author: marc.hickling
author_rank: Contributor
timestamp: February 11, 2020, 06:11:09 am
content: Hey any know of anyone who is a good electronic engineer that lives in China and speaks good english? There must be someone! Need help sourcing some parts/finding a supplier

author: VK3DRB
author_rank: Super Contributor
timestamp: February 13, 2020, 09:15:46 pm
content: There are not many electronic engineers in China who can speak English, but some have very good English writing skills. Fortunately I always have a Chinese engineer around who can make phone calls if necessary. Come to think of it, from my experience there are not many Anglo electronic engineers born in Australia with good written English. If it wasn't for spell checkers, most would be stuffed. I have found that American electronic engineers have superior writing skills to their Aussie counterparts.A former colleague of mine had a hobby of studying linguistics. He told me the world's most difficult language to learn is Icelandic, the world's easiest language to learn is Indonesian and the world's most perfected language is Italian. In my opinion, the world's most difficult language to learn is C++, the easiest language is C, and the most perfect language is C#.

author: marc.hickling
author_rank: Contributor
timestamp: February 15, 2020, 07:06:32 pm
content: Quote from: blueskull on February 11, 2020, 06:16:21 amthanks Mate, I'll DM youAmazing. Thankss
RIP Barrie Gilbert (1937-2020) - Page 1
Forum section: electronics / general

author: 0culus
author_rank: Super Contributor
timestamp: February 09, 2020, 06:38:35 am
content: Apologies if this has been shared already, but there's a bit of sad news. Barrie Gilbert (father of the Gilbert cell among many other things) passed away on Feb 4.https://www.microwavejournal.com/articles/33425-living-and-learning-with-barrie-gilberthttps://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4785651
Magnetometer - Questions - Page 1
Forum section: electronics / general

author: mzdenkov
author_rank: Regular Contributor
timestamp: February 06, 2020, 03:56:11 pm
content: So i have this magnetometer LIS2MDL.Normally i use magnetometers that have scale +-8 or +-2 gauss.They say that it has " ±50 gauss magnetic dynamic range ", what does "dynamic range" mean?Is it good to determinate where north pole is(aka use it as a compass)?Thank you.Best Regards.

author: m98
author_rank: Frequent Contributor
timestamp: February 06, 2020, 09:57:07 pm
content: Dynamic range is the range the physical quantity you want to measure lies in. So in this case, the magnetometer will give you a value from -50 to +50 gauss, with adjustable null point.In this case, the higher range allows you to compensate for stronger magnetic fields in the environment while still being able to measure the earth's weak magnetic field. This comes at the price of resolution.

author: mzdenkov
author_rank: Regular Contributor
timestamp: February 08, 2020, 12:43:22 pm
content: Greetings,QuoteThank you for your answer.After making little calculations and using WIKI.Earths magnetic field is: 0.25(250mgauss) to 0.65(650mgauss) gauss.LIS2MDL has 16bit data registers and sensitivity 1.5 mgauss/LSB250 mgauss / 1.5 (mgauss / LSB) = 166.66 -> 167650 mgauss / 1.5 (mgauss / LSB) = 433.33 -> 434And if im not wrong ill be working in range of 8 to 12 bits of usable data ?

author: Siwastaja
author_rank: Super Contributor
timestamp: February 08, 2020, 05:57:21 pm
content: Yes, having already been answerred, do note that using magnetometer as a compass is a fairly complicated task.If you need more accuracy than, say, +/- 45 degrees, you need at minimum:1) A calibration jig2) A calibration and data compensation algorithm against hard iron and soft iron distortion. This needs to be unit-by-unit. The math for simple compensation (say, to +/- 20 degree accuracy) is fairly simple, do some offset & gain scaling, but for really usable compass, especially 3D (one which can be used at any angle), the math is very convoluted and I haven't been able to find any open-source implementation or freely available descriptionGetting low-noise data practically requires averaging over a long time, say second-scale. If you then need quick response, you need to do some sensor fusion with gyros, which in itself is fairly trivial if you have already solved 1 and 2.PCB layout and device casing matters as well.All of this is because the earth's magnetic field is very weak, interference sources are often much stronger, and all the nearby components and metallic materials distort the fields.This is something I tried to do as a part of a bigger project, and never had time to do properly. It was more difficult than I thought.
nokia lumia 520 Microsoft  Stopped support for app store - Page 1
Forum section: electronics / general

author: nvidia
author_rank: Regular Contributor
timestamp: February 07, 2020, 07:56:51 am
content: i have a nokia lumia 520 my friends aunty gave me because she dropped i replaced the touch part of screen for like $3but now Microsoft no longer support the app store on 8.1 so where would i go to download apps or games for this phone?

author: jogri
author_rank: Frequent Contributor
timestamp: February 08, 2020, 12:14:04 pm
content: You can't as Microsoft designed those devices to only accept apps directly from the app store. However, there was one Win10 build (10240) that allowed the installation of Android apps via the developer mode. But since this is a five year old build i really wouldn't recommend using it as on your normal phone.Let's face it, Windows phones are bricked as the app store is no longer available and many apps simply refuse to run (Whatsapp is one of those).
Changes at the EDN web-site - Page 1
Forum section: electronics / general

author: orbanp
author_rank: Regular Contributor
timestamp: February 19, 2020, 12:29:04 pm
content: Hello Everyone,I have been a long time subscriber to a number of EDN news letters and enjoy reading them.Till a while ago the articles could be easily downloaded in pdf format.This is no longer the case, no more menu entries for pdf download.Is it just my browser settings or there was a policy change at EDN?If this was/is a deliberate policy change, the web-site became a lot less useful!Any comment on the above?Thanks, Peter

author: BravoV
author_rank: Super Contributor
timestamp: February 19, 2020, 01:02:53 pm
content: Its all about advertisement driven business, PDF file basically shut off part of your viewing real estate areas, especially for the onlined interractive types.

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 19, 2020, 01:12:48 pm
content: Indeed, it seems to have changed lately.As BravoV said. It's just a matter of generating revenue. Yes it sucks, but they probably don't have a choice if they want to keep running.

author: blackdog
author_rank: Frequent Contributor
timestamp: February 19, 2020, 01:21:34 pm
content: Hi,I hardly ever go to EDN now, way too much marketing bullshit and tracker.They themselves make it increasingly unattractive to go to that website.It's like the last years of "Electronics and Wireless World" almost entirely advertising and you had to look hard for articles that were of some value.Bye EDNKind regarts,Bram
Eletronic Equipment Store - Page 1
Forum section: electronics / general

author: franciscoPT
author_rank: Contributor
timestamp: February 05, 2020, 09:14:39 pm
content: Hello guys. I'm from portugal and i want to know the best stores in europe that sell eletronic equipment (lab power supply, oscilloscope, etc).

author: daqq
author_rank: Super Contributor
timestamp: February 05, 2020, 09:31:02 pm
content: New stuff: The common distributors - farnell, mouser, digikey, elfa, or smaller local distributorsOld stuff: ebay, swapmeets, fleamarkets, local ebay/craiglist equivalent

author: RoGeorge
author_rank: Super Contributor
timestamp: February 05, 2020, 09:44:58 pm
content: Batronix, Germany.I've bought a few Rigol instruments from them. Good prices, outstanding services.