hybridfree/eevblog-posts huggingface dataset:
Trade war politics driven Micron ban in China. - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: July 04, 2018, 03:07:57 am
content: Is this just the beginning? How far do you think this will go?

author: BravoV
author_rank: Super Contributor
timestamp: July 04, 2018, 03:24:50 am
content: Quote from: blueskull on July 04, 2018, 03:14:37 amI see that as an opportunity for China to approach politically and business wise of course to Korea & Taiwan, as these are well known US allies.

author: Gyro
author_rank: Super Contributor
timestamp: July 04, 2018, 04:07:07 pm
content: Ouch, that's a nasty thought, it could really stoke the sovereignty situation situation with Taiwan and China. It's hard to think of a fab-less semiconductor company that doesn't use TSMC (or UMC).

author: rstofer
author_rank: Super Contributor
timestamp: July 04, 2018, 05:28:47 pm
content: Maybe, but the last I read was that South Korea was getting cosy with Russia. I don't see that ending well...If we shut down Chinese imports, WalMart will be out of business.https://thediplomat.com/2018/03/why-are-us-allies-japan-and-south-korea-drawing-closer-to-russia/

author: BravoV
author_rank: Super Contributor
timestamp: July 05, 2018, 06:43:03 am
content: Yep, so simple and not complicated.On Russia, just one word, gas, as at Western part like European countries love & hate relationship (love their gas, but hate the Russians), hence upcoming NATO event as Trump says, since you European guys hate Russian, and they're living the same block as you all, then stop being freeloader and put more money into NATO military, US doesn't want to be Santa Claus anymore for NATO. Also its the main reason why most Western rich Europeans countries work so hard on renewable energy, the true reason is not to save the earth mainly, but still its a good excuse that their people love to hear.While Eastern counterparts like Taiwan, Korea & Japan just prefer not to develop the European's route like above, since there is still another major factor which is ...... China ... living nearby their border or just over narrow straits, a main power force for their manufacturing infrastructure, and also potential future huge market for their products, as these Koreans, Japanese & Taiwanese I believe still prefer to love money over the membership of "Anti Communism" dogs pack lead by US.This is the reality, not all people want to admit or believe this.
USB-C hub -- help needed - Page 1
Forum section: electronics / general

author: blueskull
author_rank: Unknown
timestamp: July 03, 2018, 05:55:02 am
content: Does anyone here knows where to get a type C hub?I'm NOT talking about type C to multiple type A, I'm talking type C to type C, with active MUX for alternate modes.My intended case:Laptop-->Hub-->Monitor (DP alt mode over type C)-->Charger (CC USBPD over type C)-->USB 3.0 type A portsI'm pretty sure such a thing doesn't exist, but just in case, before I spend 50 hours+$1000 on reinventing the wheels.

author: Fsck
author_rank: Super Contributor
timestamp: July 03, 2018, 06:14:21 am
content: you sound like you want a usb c dock?

author: Howardlong
author_rank: Super Contributor
timestamp: July 03, 2018, 06:58:01 am
content: Quote from: blueskull on July 03, 2018, 06:32:26 amI’m in the same situation, 12” Macbook that I use when travelling. I’m not aware of any USB C hubs I’m afraid. While I love the screen dimensions, form factor and weight, it was not the sharpest idea to release it with a single port, which typically is used for charging. As a result I have accumulated a collection of various dongles, as I am sure you have. Some work better than others. Power delivery compatibility is a crap shoot. Some dongle docks provide better USB A current delivery than others. All seem a compromise. I was surprised to learn after purchase that the port isn’t even Thunderbolt.

author: TheSteve
author_rank: Unknown
timestamp: July 03, 2018, 07:07:36 am
content: I've never seen such a thing - which is a little odd actually. At the moment it would be a challenge to only use only USB-C with a bunch of devices, especially with a laptop.I have a Thunderbolt 3 dock for my Lenovo Yoga X1, it has lots of USB3, audio, DP, HDMI, VGA etc and a single USB-C/TB port you can use when it is connected. Lenovo wasn't quite as silly though and included two USB-C/TB ports on the laptop.I guess when it is created it will need to be a smart devices to handle the power supply voltages - certainly wouldn't want to use some cheapie no/name one would you!

author: Bassman59
author_rank: Super Contributor
timestamp: July 03, 2018, 08:00:34 pm
content: Quote from: blueskull on July 03, 2018, 05:55:02 amI haven't seen one and would really like one.

author: Fsck
author_rank: Super Contributor
timestamp: July 03, 2018, 08:43:12 pm
content: some TB breakout docks have USB-PD ports, but I guess I've never seen an actual usb c hub.

author: ConKbot
author_rank: Super Contributor
timestamp: July 03, 2018, 09:16:34 pm
content: Maybe I'm not up to date, but how would you get DP alt mode and USB SS over one cable? There are only 4 high speed pairs in a USB-C cable, which DP would use all of them.

author: Howardlong
author_rank: Super Contributor
timestamp: July 04, 2018, 01:45:50 pm
content: Up to about 4k30p, it supports USB 3.1 and DP simultaneously, I assume 2 lanes only are used for DP and the four lane stream is muxed. Over 4k30p, you’re right, the USB part only supports high speed over the “legacy” lanes.Edit: seehttp://www.vesa.org/wp-content/uploads/2014/09/DP-Alt-Mode-Overview-for-VESA-v1.pdf
Reverse-Engineering a Big Trak Toy From 1979 - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: July 01, 2018, 01:19:36 am
content: http://www.robotroom.com/BigTrak.html

author: AllTheGearNoIdea
author_rank: Unknown
timestamp: July 02, 2018, 08:58:08 pm
content: I used to love my big track. The hamster not so much.

author: BillB
author_rank: Unknown
timestamp: July 02, 2018, 09:32:21 pm
content: It even had that awesome trailer!I had Big Trak envy; I was too poor to have one as a kid.

author: AllTheGearNoIdea
author_rank: Unknown
timestamp: July 02, 2018, 09:55:14 pm
content: The trailer was the hamster chariot, could even tip the little bugger out on command

author: BillB
author_rank: Unknown
timestamp: July 02, 2018, 11:10:29 pm
content: How many times did you run over said Hamster after dumping him from his chariot?

author: james_s
author_rank: Super Contributor
timestamp: July 03, 2018, 12:47:17 am
content: That thing looks like something I would have loved. It's just a bit before my time though so it was probably out of production by the time I was old enough.
Crimp (die) for "flag" terminal ? - Page 1
Forum section: electronics / general

author: onesixright
author_rank: Frequent Contributor
timestamp: July 02, 2018, 08:12:30 pm
content: Hi All,I could use some hel with to crimping afewwires with a "angle/elbow/flag" terminal (1.5 mm2). See picture.I'm googling my ass off, but I can't find a budget-friendly die (preferable EU)Found this one (I think it says 'abgewinkelt' = angled ?):https://www.conrad.de/de/crimpeinsatz-flachsteckhuelsen-05-bis-25-mm-toolcraft-1423369-passend-fuer-marke-toolcraft-1423556-1423369.htmlBut its insulated, and of-course, I need thenon insulatedversionAnybody a tip / hint?For a second I thought to just use some plier and solder it. But its mains power, and I'm not comfortable going down that path.As always, many thanks!

author: tautech
author_rank: Super Contributor
timestamp: July 02, 2018, 08:23:31 pm
content: Never heard 'flag' before so learnt something !http://www.ferrulesdirect.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=FD&Category_Code=FLAGNONINSULQUICKWe've always called them 900or right angle.Try Googling this:right angle spade connector female

author: onesixright
author_rank: Frequent Contributor
timestamp: July 02, 2018, 08:31:33 pm
content: Quote from: tautech on July 02, 2018, 08:23:31 pmYour welcomeThanks, but I meant thedie(the head you put on the pliers). The terminals self, I can find .. :-)

author: tautech
author_rank: Super Contributor
timestamp: July 02, 2018, 08:41:20 pm
content: Quote from: onesixright on July 02, 2018, 08:31:33 pmOK but how much is budget friendly ?http://www.ferrulesdirect.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=FD&Category_Code=DIES4FLAGTERM

author: onesixright
author_rank: Frequent Contributor
timestamp: July 02, 2018, 08:52:24 pm
content: Quote from: tautech on July 02, 2018, 08:41:20 pmThanks, yeah those are the ones i need, but they are not uniform.A $25 die is doable, but the machine that comes with it $699, is not :-)

author: Seph.b
author_rank: Regular Contributor
timestamp: July 02, 2018, 08:57:34 pm
content: I would contact the maker of the tool you have and see if they can recommend a die.Or...Try finding a vendor that sells dies for the tool you have on Aliexpress/Alibaba and contacting them with drawings of the connectors you need crimped.

author: Nusa
author_rank: Super Contributor
timestamp: July 02, 2018, 11:28:01 pm
content: Quote from: onesixright on July 02, 2018, 08:52:24 pmLooks like all those dies have a $50 hand tool option.
Longer Thunderbolt 3 Cables - Page 1
Forum section: electronics / general

author: Richard Crowley
author_rank: Super Contributor
timestamp: July 03, 2018, 03:12:46 pm
content: A query on another forum (https://www.gearslutz.com/board/connectors-cables-stands-and-accessories/1221760-do-3-meter-thunderbolt-3-cables-exist.html) asked about sourcing longer Thunderbolt 3 cables (with the USB-C connector).The spec says that copper cables should be available up to 3m, and optical up to 30m. But not in evidence if you actually want to buy one. What gives?

author: iainwhite
author_rank: Unknown
timestamp: July 04, 2018, 11:51:56 am
content: I foundthis articlewhich touches on the issues.
Self-employed electricians launch IWGB branch to fight against exploitation... - Page 1
Forum section: electronics / general

author: maiekmire
author_rank: Contributor
timestamp: July 02, 2018, 11:50:27 am
content: Self-employed electricians launch IWGB branch to fight against exploitation and de-skilling.https://iwgb.org.uk/2018/07/02/self-employed-electricians-launch-iwgb-branch-to-fight-against-exploitation-and-de-skilling/

author: maiekmire
author_rank: Contributor
timestamp: July 02, 2018, 11:53:52 am
content: Does Licensing for electrical workers not prevent de-skilling? New to the term, understand the concept. Would the complaint be: That a licensed/certified electrician is handing out tasks to unlicensed individuals without supervision or follow-up?

author: Simon
author_rank: Unknown
timestamp: July 02, 2018, 12:08:07 pm
content: The solution is simple, ban companies from having employees that are self employed if they do more than a certain percentage of work for that company. I suspect this us off the back of the self employed plumber suddenly deciding he was an employee when it suited him

author: iainwhite
author_rank: Unknown
timestamp: July 02, 2018, 05:49:22 pm
content: QuoteI think the complaint is that the requirements for "licensing" have been reduced - I assume that the 16-week training courses mentioned in the article are shorter (and cheaper) than the previous requirement, and therefore the barrier for new entrants is reduced and the greater availability of electricians will tend to reduce pay rates...

author: maiekmire
author_rank: Contributor
timestamp: July 02, 2018, 06:05:15 pm
content: Quote from: iainwhite on July 02, 2018, 05:49:22 pmMakes sense. That's one way to counter the shortage of skilled labor I guess. I sort of saw this play out with a one-man NFPA inspection/device testing shop. He was contracted under a larger Fire System/Extinguisher outfit to perform annual inspections. Found out later that he wasn't technically performing the tests correctly, just spraying canned smoke at detectors until they went off. He mentioned how they can shirk a bit of liability by contracting out the inspections, and how it was a game of numbers, you need a lot of customers to offset the likelihood of getting sued if something burnt down.

author: Simon
author_rank: Unknown
timestamp: July 02, 2018, 06:34:03 pm
content: Employers want cheaper workers so yes deskilling is a concern. Where I work we make devices that would put lives at risk if they went wrong yet the end of line testing could be done by someone who is not that sharp, does not understand the inner workings of the systems and has a poor grasp of English. I constantly complain of it and often reference "manuel" from faulty towers. I myself am working beyond my so called skill level but then I have seen some so called skilled people that would not have a clue in my situation.
Good O'll silicon Chip Porn  - Page 1
Forum section: electronics / general

author: FotatoPotato
author_rank: Regular Contributor
timestamp: April 04, 2018, 12:09:37 am
content: Nothing like some good o'll silicon Porn!, Post your pics of the best silicon chips you have

author: daqq
author_rank: Super Contributor
timestamp: April 04, 2018, 06:16:04 am
content: You nasty person! If you're into that stuff:https://zeptobars.com/en/Included are photos of a SAW filter that someone managed to kill... (me)

author: FotatoPotato
author_rank: Regular Contributor
timestamp: April 04, 2018, 01:52:03 pm
content: Awww man, there goes my whole day! All im gonna do is scroll through those pic from the site you linked. Thanks haha

author: raptor1956
author_rank: Frequent Contributor
timestamp: April 05, 2018, 01:59:47 am
content: Quote from: FotatoPotato on April 04, 2018, 12:09:37 amTechnically, that would be Silicon Wafer Porn!Brian

author: amyk
author_rank: Super Contributor
timestamp: April 05, 2018, 02:52:21 am
content: The first two pictures appear to be aMPW. Normally all the ICs on a wafer will be the same, but there's far too much variety in shapes and sizes on that one.

author: Ampera
author_rank: Super Contributor
timestamp: April 05, 2018, 02:55:34 am
content: You kids stay away from those dirty silicon wafer brothels. You'll only get binned offerings!

author: VK3DRB
author_rank: Super Contributor
timestamp: April 05, 2018, 10:34:29 am
content: There is nothing pornographic about this. A lot of electronics people are weird, and you are at the edge of the bell curve, Spurty Mcgoo.

author: daqq
author_rank: Super Contributor
timestamp: July 01, 2018, 04:43:03 pm
content: Some more silicon exposed:https://www.youtube.com/user/SIC66SIC66
Package diagram missing in various TI datasheets - Page 1
Forum section: electronics / general

author: blueskull
author_rank: Unknown
timestamp: June 30, 2018, 06:21:24 pm
content: I've been reading a few datasheets from TI, and it seems like they no longer want to keep the diagrams in the datasheet. Has anyone else encountered this?Examples: LP5907older revision had the diagrams, latest hasn't.Also, TPS7A10 has not, and there's no where to find the package diagram, besides to extract from ultra librarian library supplied by TI.Are they trying to screw up their app engineers just like Maxim did before? Ay least with Maxim, with package code, you can download a PDF drawing. Not even that with TI!

author: JPortici
author_rank: Super Contributor
timestamp: June 30, 2018, 06:30:19 pm
content: never noticed itI would hope that since this appears to be a brand new part (MARCH 2018 - REVISED JUNE 2018) the information is not there yet.Side note: man, TI released incredibly useful LDOs and DCDCs recently, in the automotive catalog at least...However, they keep making new ones and putting the old parts in obsolescence, i already had to change the part twice last year..They appear to be new silicon revisions (same pinout or with minor differences in NC pins that now have a function, almost same specs) but it's still annoying.I recently saw their youtube video on three level buck converters. brillant!
SPACEX - Last Block 4 launch and first passenger Cimon - Page 1
Forum section: electronics / general

author: chris_leyson
author_rank: Super Contributor
timestamp: June 30, 2018, 09:21:08 pm
content: Last launch for the Falcon 9 Block 4. Been watching rocket launches for 50 years and this stuff never gets boring. Well done SPACEXFirst crewed flight, SpX-DM2, is scheduled for December 2018. First crewed flight for Boeing ST-100 Startliner, BoE-CFT, has been delayed. I supose this lauch has one "crew member", Cimon, Crew Interactive Mobile Companion.https://www.bbc.co.uk/news/technology-44655675. "An "offline" button has been designed for Cimon, which allows German astronaut Alexander Gerst to avoid having audio streamed to servers on Earth during moments of privacy" Just a much bigger version of Alexa then, hardly AI. With 14 fans to move it around you would think it came with unicorn farts built in because it's probably quite smelly on the ISS

author: Brumby
author_rank: Unknown
timestamp: July 01, 2018, 12:15:16 am
content: Quote from: chris_leyson on June 30, 2018, 09:21:08 pmExcept NASA actually has a "Chief sniffer" (yes, it's a real job) to prevent smelly stuff going into space. After all, it's not as if they can open a window for a fresh breeze.

author: BrianHG
author_rank: Super Contributor
timestamp: July 01, 2018, 12:21:24 am
content: Quote from: Brumby on July 01, 2018, 12:15:16 amThanks. You made my day. And I see it must be true.
Strange interaction between multiple buck converters - Page 1
Forum section: electronics / general

author: dcarr
author_rank: Regular Contributor
timestamp: June 28, 2018, 08:01:25 pm
content: I recently designed a 28V->12V 15A buck converter that lives on a 28V bus inside a vehicle. I designed it myself because it needs to meet strict EMI requirements and the off the shelf units I purchased failed miserably. Anyway...The converter seems to work great except for one thing---there are two other pieces of equipment on the bus which contain ~30W buck converters and when those buck converters first start up, it causes my converter to dip down <10V for approximately 500ms. Interestingly, the main 28V bus doesn't sag much at all during this time so there must be some interaction between the other converters and mine. Perhaps when the other converters are charging their own bulk capacitance they present a load to the bus that causes my converter to become unstable?Has anyone run into something like this before? It's a bit difficult to get a scope out to check the signals further, but that's on my to do list.Thanks for any ideas.

author: jmelson
author_rank: Super Contributor
timestamp: June 28, 2018, 08:06:46 pm
content: Are these other converters fed off the same "branch", ie. on the same fuse or breaker as yours? They may be causing a sudden dip in the 28 V seen at your converter input.I think you may just have to lug a digital scope out there so you can observe the transient. My GUESS, and it is just a guess, is that there is a long run of wire from some main panel to your (and the other) devices, and when they are turned on, the resistance (and possibly inductance) are causing a big sag in the voltage.Jon

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 29, 2018, 07:51:56 pm
content: You were so preoccupied with emissions that you didn't check susceptibility?Tim

author: David Hess
author_rank: Super Contributor
timestamp: June 30, 2018, 02:49:00 pm
content: You might check how much input capacitance the various switching regulators have. Adding some bulk input capacitance might be enough.If these are non-isolated buck converters, are their outputs grounded creating a ground loop?Measuring the input voltages with an oscilloscope will rule out some possibilities.
Huawei RRU3908 base station teardown  "A thing of beauty is a joy forever " - Page 1
Forum section: electronics / general

author: johnlsenchak
author_rank: Frequent Contributor
timestamp: July 02, 2018, 10:14:58 pm
content: Huawei RRU3908 base station teardown (part 1 of 2)Kaizer Power ElectronicsPublished on Jul 2, 2018
Have you noticed videos on Twitter skipping? (mostly on mobile) - Page 1
Forum section: electronics / general

author: a59d1
author_rank: Regular Contributor
timestamp: June 30, 2018, 03:47:07 am
content: Sometimes they'll jump half a second, sometimes two or three. The audio jumps in synchrony - it's like someone does a few awful jump cuts every dozen seconds or so. Tremendously obnoxious.

author: a59d1
author_rank: Regular Contributor
timestamp: June 30, 2018, 03:51:00 am
content: Here's an example: the skipping happens around the 1.5s mark.https://mobile.twitter.com/meganmorrone/status/1012394756675006464/video/1
What Causes Crashed/Glitched Digital Audio Motorboating? - Page 1
Forum section: electronics / general

author: Cyberdragon
author_rank: Super Contributor
timestamp: June 30, 2018, 02:35:54 am
content: I haven't been able to find an actual technical answer, just "fixes" and whatnot on forums. It might be because it's not called "motorboating" or something if it's not analog so I don't know how to find it.I'm interested in the reason (digital system wise) why when a system with digital audio (such as a PC) crashes, overloads, or encounters a problem where it locks up (freezes) while playing audio it sometimes starts repeating the last few samples on loop (resulting in an engine-like purr). Why would it repeat instead of just stopping? Is is because the file reading system gets caught in a loop due to the code lock-up? Or is it something weird going on in the hardware?
US policeman bolts from lightning strike - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: June 30, 2018, 12:38:34 am
content: Pretty close.https://www.bbc.com/news/av/world-us-canada-44663619/us-policeman-bolts-from-lightning-strike

author: chris_leyson
author_rank: Super Contributor
timestamp: June 30, 2018, 01:38:40 am
content: Nice oneThat's not something you see every day. Got to love it, electricity from the sky, and it's freeI love the streamer parallel to the light pole, wtf, that's got to be resonant, it's like the pole is open circuit !
Mirrord SOT 23 ? - Page 1
Forum section: electronics / general

author: Evert
author_rank: Newbie
timestamp: June 29, 2018, 04:50:10 pm
content: Dear friends,it has been a long time that I did draw a PCB.Now I made a few new ones, and I came to the conclusion,that I was mistaken with the connections of a SOT23 transistor.I have 'looked' on the bottomside instead of the topside.So I changed Base and EmittorIs there any type of transistor in SOT23-case, that has BASE on 2 and EMITTOR on 1 ?Voltage >25 Volts, current > 100 mA, Hfe ... well... some 100 ?Many thanks in advance !Evert

author: andy1
author_rank: Contributor
timestamp: June 29, 2018, 05:49:30 pm
content: Done this once myself, if this is not a large run of boards I would just flip the normal sot-23 transistor upside down and bend the legs down (which is what I did in this case as it was only few boards).This way you can use whatever common transistor you were thinking of using originally.

author: Evert
author_rank: Newbie
timestamp: June 29, 2018, 07:37:14 pm
content: Hi Andy,ofcourse I have thought about that, but I thought it was not such a good idea.In the mean time I found out that there is besides the BC817 also an BC817R,with reversed connections for BASE and EMITTER.A few of the PCBs have to be made again, because of other problems, so I alsocan turn the BC817 180° and pull the COLLECTORconnection between B and E.That is not a big change in the drawing of the PCB.But thanks for thinking along !Nice weekend !Evert
Heatshrink plastic bag for small PCB - Page 1
Forum section: electronics / general

author: Martin F
author_rank: Regular Contributor
timestamp: June 28, 2018, 07:26:48 pm
content: Hi all,We're developing a small PCB with a DB9 connector in each end (~5 x 4 cm).For this we're looking for a simple "wrapping" to protect it - and we thought of heatshrink plastic.However, we're not familiar with this and wanted to hear if you have suggestions for where/what to look for?Thanks,Martin

author: SeanB
author_rank: Super Contributor
timestamp: June 28, 2018, 07:36:37 pm
content: Yes, though you probably want an adhesive lined heatshrink if you want to have a more robust shrink sleeve. Otherwise you can get by with only a cheap shrink sleeve, as used for bottles, instead of a regular heatshrink sleeve, or even use a shrinkable plastic sleeve like used for wrapping regular goods. Otherwise look for heat shrinkable tamper proof seals as an alternative, I am using some as shrink sleeves and cable identifier protection, as the ones I got do fit over a BNC plug with ease, and are transparent as well.

author: edpalmer42
author_rank: Super Contributor
timestamp: June 28, 2018, 07:54:42 pm
content: A quick check on ebay showed heatshrink tubing in sizes up to at least 100 mm in clear or many colors. Some had adhesive lining, some didn't.Ed

author: glarsson
author_rank: Frequent Contributor
timestamp: June 28, 2018, 07:58:52 pm
content: There is also the choice of normal thickness and the thin version used to hold battery packs together.

author: Martin F
author_rank: Regular Contributor
timestamp: June 28, 2018, 08:47:02 pm
content: Thanks all for the tips ! Any idea what the version for battery packs is called?

author: glarsson
author_rank: Frequent Contributor
timestamp: June 28, 2018, 08:55:27 pm
content: Quote from: Martin F on June 28, 2018, 08:47:02 pmJust search for "heat shrink tubing battery pack" on eBay and you will find several examples. The thickness is around 0.1mm.
Where to buy Keysight 34461A with valid cal cert? - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: June 27, 2018, 08:59:24 pm
content: Hi,We used to buy our meters from tequipment.com and they would come with almost a year of cal left on them.I guess tequipment shipped so many per month that they didn't sit around for long.But it looks like tequipment.com they have stopped selling all Agilent/Keysight gear.We tried to get a 34461A 6.5digit desktop meter from the local agent (element14) however they shipped a unit with a month left on its year of cal.So that got returned.Can anyone recommend a good online store that sells Agilent/Keysight gear?Preferably one that does a lot of sales per month so wont have stock sitting around for long.

author: nctnico
author_rank: Super Contributor
timestamp: June 27, 2018, 09:38:13 pm
content: Did you try to get a quote through the Keysite website? That should get you in touch with their preferred distributor for your country.

author: Psi
author_rank: Super Contributor
timestamp: June 27, 2018, 11:01:39 pm
content: Yeah, the local agent is element14.The problem is local agents don't move much stock so it sits around for many months before shipping.I can order from the USA and get it mail forwarded to NZ with no problem.I just need to find somewhere that moves lots of volume (and stocks the 230V version)

author: Dubbie
author_rank: Unknown
timestamp: June 27, 2018, 11:18:02 pm
content: I got one from element14 and it came with 11.5 months left of cal.

author: tautech
author_rank: Super Contributor
timestamp: June 27, 2018, 11:39:44 pm
content: If by any chance you want to look at a SDM3065X you can have my demo unit for a bit, it's still in Cal for some months yet.
Archive footage (LOTS of vintage goodness!) - Page 1
Forum section: electronics / general

author: cprobertson1
author_rank: Frequent Contributor
timestamp: June 27, 2018, 04:56:53 pm
content: I recently came across a great youtube channel, calledJeff QuitneyIt has TONS of vintage footage from the early 1900's right up to the modern day (usually with cleaned up audio).It covers a huge range of topics: I'll pick a handful at random to give you an idea of the range of stuff here:-Trench Warfare (a how-to-guide!)-Traffic lights and how to use them (green means go!) (1936)-"How a gearbox works" (chevy motors, '37)-Nylon stockings (oo-la-la!)-Pressure cookers, they were once new as well!-Bazooka training (point over there please)-The interim reports from pretty much every cool space project you can think of: Atlas, Mercury, Juno, Apollo, Gemini - it's all there-Terrifying declassified cold war stuff about how best to drop very large bombs on very large cities-Moonlanding footage (internal NASA overview)-A bunch of tests of various rocket engines-1940's fashion (check that hair!)-Silicon Carbide and Aluminum oxide - from the carborundrum company (c.1920)Of particular interest to the EEVBlog folk are all the great electronics videos: I am particularly partial to the Airforce technician training video on AC Motors - but there are plenty more where that came from!-The oscilloscope (it was new then)-Transistors (they were new then as well)-LEDs (OMAGOD this new technology is magic!)-Tubes (screeds of things!)There are also a bunch of fundamental videos (usually US Airforce training films?) covering lots of interesting things for novices - basics like LC oscillators, filters, and a bunch of other analogue stuff (bear in mind some of this is a little dated xD)Anyway - hope you guys found the channel interesting!There is certainly a great deal of interesting things on there - I'm currently reliving the first moonalnding with firsthand footage from the control centrePs - I totally think the EEVBlog would look just like this if it were made in the '60s - even some of the mannerisms are there]
Greatest Inventions/Inventors in Physics - Page 1
Forum section: electronics / general

author: philaburns
author_rank: Newbie
timestamp: June 27, 2018, 03:36:02 am
content: Hi ForumI have been tasked with giving a talk in a couple months on the greatest inventions in Physics, and am just taking a straw poll to get ideas from the industry. Ideas can be in any field but need a physics angle. Examples may be the telephone, light bulb, wireless communication systems, GPS satellite systems, the transistor, the laser, coffee espresso machines, ... whatever. I will also take ideas/nominations on the greatest inventors in Physics over the past 100 years or so. Bonus points if you can also identify the first patent to your invention. Of course, credit will be given if I use your idea.Thanks for your help.Phil

author: tpowell1830
author_rank: Frequent Contributor
timestamp: June 27, 2018, 03:46:21 am
content: This an easy answer, since you are limiting to around 100 years. Tesla started the modern electrical movement that we must thank him for and that is alternating current for household power. Without that invention, we would not be talking on a forum or have advanced technologically as far as we have. Thankfully, Edison did not win that battle.

author: tautech
author_rank: Super Contributor
timestamp: June 27, 2018, 03:47:15 am
content: Electricity for the masses bar none !So much has evolved from harnessing it as to affect everyday lives.Sure bit more than 100 years has passed since its introduction but not everybody has had the luxury it provides for 100 years.My dad was just 4 and the youngest of 3 when it came here in 1935. My grandma had already been married for 13 years and bit by bit they acquired all the labor saving devices that only electricity distribution can provide.

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 27, 2018, 04:04:47 am
content: Shuji Nakamura, inventor of efficient white and blue LEDs.John Goodenough, inventor of the modern lithium ion battery.Intel, first to bring a high k process to consumer products.Quote from: tpowell1830 on June 27, 2018, 03:46:21 amThat's outside the 100 year mark.
Australian Goods and Services Tax on Electronics Imports - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: June 26, 2018, 02:20:01 pm
content: is it true, that an Australian goods and services tax onALLImports under $1000is starting this July?

author: John B
author_rank: Frequent Contributor
timestamp: June 26, 2018, 10:06:34 pm
content: There is a discussion about it here:https://www.eevblog.com/forum/chat/introduction-gst-for-cheap-goods-(australia)/

author: Halcyon
author_rank: Unknown
timestamp: June 26, 2018, 11:16:57 pm
content: Quote from: John B on June 26, 2018, 10:06:34 pmThis.Also, it is true. More information here:https://www.ato.gov.au/Business/International-tax-for-business/GST-on-low-value-imported-goods/

author: digsys
author_rank: Unknown
timestamp: June 26, 2018, 11:57:05 pm
content: Yup, and likely many companies won't bother to export to OZ. So far, only Digikey has contacted me for an ABN, for business as usual.Hopefully, others will follow, or we need to find "work-arounds" :-)
SPI on Kinetis MCU? - Page 1
Forum section: electronics / general

author: eecook
author_rank: Regular Contributor
timestamp: June 23, 2018, 12:06:01 am
content: Hi All,Has anybody else experienced tremendous frustration trying to get the SPI bus to do anything at all on a Kinetis MCU? I have 2 devboards (K22F and K64F). I have tried the code from the KSDK v1.3 in all the variants it comes in, on both of them, including Slave, Master, Loopback, Blocking, non-blocking, etc, etc.I have downloaded code from github, made my own tweaks, and nothing! All the SPI lines are idle when I look at them with the scope and cannot get it to read data when using it as a Slave.I have tried many of the KSDK samples like the UART and GPIO interruptions and it works just fine, but SPI seems to have it's own personality arghhh!!!Anyways, thought I could just share the frustration.

author: mac.6
author_rank: Regular Contributor
timestamp: June 23, 2018, 12:01:10 pm
content: KDSK1.3 is obsolete, move to mcuxpresso sdk 2.2 at least. Remember also to enable SPI clock and assign correct pinmux.

author: eecook
author_rank: Regular Contributor
timestamp: June 25, 2018, 10:45:16 pm
content: Quote from: mac.6 on June 23, 2018, 12:01:10 pmWorked out of the box with MCUXpresso. Thank you!
MOSFET failure - Page 1
Forum section: electronics / general

author: rckanta
author_rank: Contributor
timestamp: June 25, 2018, 02:51:46 am
content: Am designed inverter 12 to 200vOne MOSFET is driving from pin 11 of sg3525 this MOSFET is fail when I turned on the inverterAnd sometimes this MOSFET(irf3205) is fail when I connect the load like 15 WattSometimes this MOSFET explore and crackAnother MOSFET is working fine (driven from pin. 14)How to fix this problem

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 25, 2018, 03:07:39 am
content: Do you have proper soft start and cycle by cycle current limiting?

author: rckanta
author_rank: Contributor
timestamp: June 25, 2018, 03:16:07 am
content: For the soft start I use 10uf it will give 0.5S delayed

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 25, 2018, 03:34:17 am
content: And what about the cycle by cycle current limit?

author: rckanta
author_rank: Contributor
timestamp: June 25, 2018, 04:13:41 am
content: There is some dead timeBut there no current limiting ckt

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 25, 2018, 04:18:11 am
content: Well there's your problem.No surprise it's not robust against inrush.

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 25, 2018, 12:42:35 pm
content: Not static spike voltage problems with a 'MOS' device ??

author: rckanta
author_rank: Contributor
timestamp: June 25, 2018, 02:15:15 pm
content: I think it is because of spike
Wierd HV Battery - Page 1
Forum section: electronics / general

author: Cyberdragon
author_rank: Super Contributor
timestamp: June 25, 2018, 04:53:22 am
content: So I found a US based company called Excell Battery that remakes most types of odd/rare and vintage battery types with modern chemistries, including B batteries for old tube and early transistor radios. They are pricey but the price seems to vary a lot depending on the seller.What I don't get however, is what on earth is this and what is it used for? Tube stuff?https://www.amazon.com/dp/B00IDXP42K/ref=asc_df_B00IDXP42K5520347?tag=merbethomgarparenting-20&creative=395261&creativeASIN=B00IDXP42K&linkCode=asn&ascsubtag=328945389I've never seen a potentially lethal single battery before.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: June 25, 2018, 05:08:46 am
content: Check out a NEDA 497. 510 Volts.But yeah. Tubes. Photoflash was primary target of the NEDA 489, but lots of high voltage batteries existed to run vacuum based electronics. Photomultiplier. Geiger. Long list of applications. Fading rapidly into the past.

author: Cyberdragon
author_rank: Super Contributor
timestamp: June 25, 2018, 05:37:29 am
content: They might have that battery in stock too.They do..but only in traditional carbon zinc (which is why it's cheaper). Ew...https://mapleleafbattery.com/?product=exell-497-carbon-zinc-510v-battery-neda-741-a497-336f20
California distributor charged with bootlegging counterfeit chips - Page 1
Forum section: electronics / general

author: Bud
author_rank: Super Contributor
timestamp: June 16, 2018, 02:45:46 am
content: Article here couple clicks away:http://www.electronicdesign.com/test-measurement/owner-independent-distributor-charged-counterfeit-chips-scheme

author: Towger
author_rank: Super Contributor
timestamp: June 16, 2018, 06:22:49 am
content: It is not clear from the article what he is actually doing/charged for. If it is for a number of different offences it make sense. But, from the end it would appear he had 2nd hand FPGAs remarked as being from a newer batch (or I assume sold them as new stock). It would also appear he had a proper Chinese lab testing them before resale, which is far than most sellers on Allieexpress :-) But made he made the mistake of selling them to the military.It also mentioned a new US Bill to stop e waste being exported, in case it get reused! I had not heard of this before. Another Trump trade restriction. Will this stop the trade 2nd hand equipment.

author: Stray Electron
author_rank: Super Contributor
timestamp: June 24, 2018, 02:26:55 pm
content: My opinionEbay is FULL of people selling counterfeit chips. It would be nice if the customs services got around to arresting them too. But I think what got this seller into serious trouble was the fact that he was selling fake documentation that claimed that the parts were from legitimate sources and that they had be tested and were fully compliant.This sentence is significant, underscore added: "The charge for dealing incounterfeit military goodscarries another 20 years maximum sentence in federal prison, ICE said"
Another amazing youtube channel disappeared. - Page 1
Forum section: electronics / general

author: Yansi
author_rank: Super Contributor
timestamp: June 24, 2018, 11:05:24 pm
content: I have just found that the Zdenek Houska's TV & video broadcast gear collector's youtube channel disappeared.Although the channel was in Czech language only, there were many great interesting videos from old tube cameras, up to quite modern (yet still vintage) video processing equipment. Many teardowns of old tech, servicing of the extremely complex equipment (including video head refurbishing), etc.I was just curious why there was no update of the Ampex repair series for a long time. Found the channel not existing. No clue what happened there, so RIP Zdenek's channel.
Ivan Sutherland : Sketchpad Demo 1963 - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: June 23, 2018, 02:18:41 am
content: Back in 1963, I wonder if they even had a clue to the degree of graphics processing horse power we have today.

author: David Chamberlain
author_rank: Frequent Contributor
timestamp: June 23, 2018, 05:32:15 am
content: "He's going to be talking to a computer", "Surely not with his voice?" .. no! that would be crazy.

author: VK3DRB
author_rank: Super Contributor
timestamp: June 23, 2018, 05:33:25 am
content: Good find, Simpson. I note the reference to grabbing resistors and transistors from a library. And today we have Altium - advanced PCB design using CAD.Ivan Sutherland is still alive. He is 80 years old. We had our own Ivan Sutherland in Australia. His name was Norbert Nimmervoll, a lecturer at RMIT who used the Data General Nova computer to teach engineering students vector graphics in 1977.

author: BrianHG
author_rank: Super Contributor
timestamp: June 23, 2018, 05:28:40 pm
content: 1963 computer animation:
Low Voltage Capacitor leakage tester - Page 1
Forum section: electronics / general

author: notsob
author_rank: Frequent Contributor
timestamp: June 29, 2018, 11:33:21 am
content: for those who are not aware Mr Carlsons lab (Paul) has released a LV Capacitor leakage tester, full design and build details are available on his Patreon ChannelHere is his intro video

author: Gyro
author_rank: Super Contributor
timestamp: June 29, 2018, 11:56:25 am
content: https://www.eevblog.com/forum/testgear/mr-carlsons-lv-capacitor-leakage-tester!-it's-finally-out!/https://www.eevblog.com/forum/testgear/how-does-the-mrcarlsons-lab-capacitor-leakage-tester-work-without-high-voltage/

author: notsob
author_rank: Frequent Contributor
timestamp: June 29, 2018, 12:38:47 pm
content: thanks gyro, i've been offline for a bit, but it was worth a mention
Components Library Website - Page 1
Forum section: electronics / general

author: radhika
author_rank: Regular Contributor
timestamp: June 20, 2018, 02:40:21 pm
content: Respected,I want to add some components to simulate my circuit in proteus but I am unable to find that desired components in proteus. I can't even find the website where i can add .lib and .idx file to add components. For eg; i want to add DMN3404L - 7 but i can't find site to add components.Please, enlighten me with some website where i download the desired .lib file for proteus.ShukriyaRadhika Das
"My Messages" location ??? - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 14, 2018, 01:26:12 pm
content: I know how to Send a personal message to someone, and after selecting "My Messages"at the top, I can see all my 'responses', as in an "InBox" list......However, I can NOT find a way to display the likes of an "OutBox", for what I've sent?

author: BillB
author_rank: Unknown
timestamp: June 14, 2018, 01:36:24 pm
content: Do you mean "sent items"?

author: rdl
author_rank: Super Contributor
timestamp: June 14, 2018, 01:39:01 pm
content: In your account settings, in a pop up menu "Modify Profile" button, there is a section for "Personal Messaging" with a checkbox for "Save a copy of each personal message in my sent items by default". It isn't checked by default. Maybe it needs to be checked before there actually is a "sent items". Mine is not checked and I cannot find a "Sent items" anywhere.edit:Quote from: BillB on June 14, 2018, 01:36:24 pmAh, there it is.

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 14, 2018, 02:14:35 pm
content: I have that setting checked...."Save a copy of each personal message in my sent items by default"However, I see NO options anywhere to display an 'OUTBOX' or 'SENT'My only options under "My Messages" are...."Read My Messages" , and"Send a Message".....

author: Brumby
author_rank: Unknown
timestamp: June 14, 2018, 02:35:09 pm
content: 1. Click on "My Messages".2. Hover over "Messages" and you will see three options3. Click on "Sent Items" for your 'Outbox'.

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 17, 2018, 12:48:13 pm
content: Quote from: Brumby on June 14, 2018, 02:35:09 pmHi Brumby .... I did that, after verifying that I have the option set in my 'Settings' to placea copy in my 'Outbox'. Upon hovering the Mouse over "Messages", all I see is......(Sorry, only online every couple of days...)

author: rdl
author_rank: Super Contributor
timestamp: June 17, 2018, 01:29:24 pm
content: Click that "My Messages" instead of just mouse over. That will take you to the messages page. There, look to the left just under the advertisements. You will see another button called Messages. Mouse over that one.

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 17, 2018, 01:43:25 pm
content: Quote from: rdl on June 17, 2018, 01:29:24 pmAAhhaaa !!!!! Now I got it !!!!!!!....... Thanks mate.....Don't understand why it was hidden away like that.....Thanks from Western Australia

author: Brumby
author_rank: Unknown
timestamp: June 18, 2018, 08:04:40 am
content: Quote from: GlennSprigg on June 17, 2018, 12:48:13 pmNot quite.... but you did get there.Yes, it is obscure.

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 21, 2018, 01:00:53 pm
content: Yea, sorry Brumby.... It didn't 'click' in my 'brain', that after "My Messages", there wasanother selection for "Messages", after the Advertisements, and without the word 'My'....Thanks...
Recover files from android built in memory  - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: June 20, 2018, 11:32:41 pm
content: ive used Recuva before and its works great to recover files from sd card or flash stick hdd ect butbut my phones built in memory does not show up in my computer it only shows up as a device so in Recuva i can't select itwhat can i do i need to get back 4 photos back if possible i deleted by mistake

author: Halcyon
author_rank: Unknown
timestamp: June 21, 2018, 12:50:24 am
content: Quote from: sony mavica on June 20, 2018, 11:32:41 pmIt's going to be quite difficult to do at home without specialised tools and skill. Most phones don't show up as drives in Windows and even if they do, it's not a guarantee that any recovery software will have direct access to it like a normal drive in order to read the unallocated data.It also depends on the type of phone you have, whether the data was encrypted, how long ago you deleted the files, etc...Specialised tools exist to dump the entire contents of a phone's memory to a file, but those are *very* expensive and depending on the phone, only accessible to Government agencies.

author: amyk
author_rank: Super Contributor
timestamp: June 21, 2018, 02:33:21 am
content: QuoteIf it's a Mediatek you can find it for free: SPFlashTool. Great way to backup everything bit-for-bit and restore from a brick, if you're into ROM modding and such.I haven't worked with any other manufacturers' but I imagine they have similar "factory tools" that you might be able to find online.If you only want to recover a small amount and have a rooted phone, then dd will work to get an image you can then work on. Most importantly, stop using it until you get that disk image --- or your chances of the data not being overwritten will continue decreasing.

author: Halcyon
author_rank: Unknown
timestamp: June 21, 2018, 09:44:47 am
content: Quote from: amyk on June 21, 2018, 02:33:21 amMost don't. If you have an Apple product, they'll just tell you to use iCloud. All the big Android brands will tell you a similar story (use Google Drive, Dropbox etc...) to back up your data. The cheaper Android's are quite easy* to get entire memory dumps from, you might even be able to do this via ADB commands.For phones like Samsung even uploading a custom boot loader can trip the Knox lock rendering your manufacturer's warranty void and inability to use Samsung Knox features like secure payments etc...For newish iPhones (from memory, iPhone 5 onwards), they encrypt data by default and each file has its own individual 256-bit AES encryption key. Once a file is "deleted" that key is destroyed which renders that file completely unreadable and unrecoverable. TheIOS Security Guideis a good read if you wanted to learn more.* "Easy" as in inexpensive and simple for a technically-minded user, not "easy" in that any average user would be able to do it.
Bodaycam recommendation? - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: June 21, 2018, 11:36:50 am
content: HiI need an Bodycam. The situation dont get better.More and more aggressive people out there.I looking for an Bodycam from an Company who sell them to everyone (not just law enforcement) and is not an Chinese Crap. The only think I found from an well known Company is:https://de.transcend-info.com/product/bodycam#376So does anyone other know?