hybridfree/eevblog-posts huggingface dataset:
Life update - Page 1
Forum section: electronics / general

author: zerorisers
author_rank: Regular Contributor
timestamp: March 09, 2017, 04:59:43 pm
content: So to leave it short I have temporarily taken a break from high school; my parents are planning on moving; I am living at my neighbors In order to stay in the DFW metroplex. I am working on receiving social security disability for my autism and ADHD. I owe money to a friends stepdad who still has my non-working motorcycle (the reason for me going there was to get the thing running...) So I still don't have a working vehicle.On a good note I am using coursera to learn more about electronics, and will hopefully be more active on the forum.Going to see an autism specialist on the 15th, and see if they will help me with my social security disability.short update on my life as it stands, a bit more going on but that will be left for a later date. I hope for the best, and that hopefully I can get everything straightened out.

author: tooki
author_rank: Super Contributor
timestamp: March 10, 2017, 10:52:26 am
content: Good luck!!I can't speak to autism, but I have ADD/ADHD as well as depression/anxiety and finally getting the right combination of meds has done wonders.
Here's one for Dave - Page 1
Forum section: electronics / general

author: rrinker
author_rank: Super Contributor
timestamp: March 09, 2017, 07:34:45 pm
content: In the US there is an auto parts chain called O'Reilly's. Hit up their site (just google it) and in the search box look for part 121G.

author: Tom45
author_rank: Frequent Contributor
timestamp: March 09, 2017, 08:18:08 pm
content: As I was typing Oreiily into the Google search the second auto complete was Oreilly 121G. Must be a lot of people passing that search around.

author: PointyOintment
author_rank: Frequent Contributor
timestamp: March 10, 2017, 06:28:20 am
content: Indeed: I typed inoreiand the first suggestion waso'reilly auto parts, with the book publisher (which is more in line with my interests) at the bottom of the list. When I accepted that suggestion (but didn't yet press enter), the next suggestion waso'reilly auto parts 121g.

author: Red Squirrel
author_rank: Super Contributor
timestamp: March 10, 2017, 06:53:07 am
content: That is pretty funny, they should have had an actual product page for it with specs and a datasheet though, just say it's not an actual item once you go to check out.
Supercomputer-on-board - NVIDIA computation/control module - Page 1
Forum section: electronics / general

author: daqq
author_rank: Super Contributor
timestamp: March 08, 2017, 06:44:38 pm
content: Seems like a really cool little thingie:http://www.nvidia.co.uk/object/embedded-systems-dev-kits-modules-uk.htmlAt 50x87mm it's pretty damn powerful.

author: jimdeane
author_rank: Regular Contributor
timestamp: March 09, 2017, 09:13:51 pm
content: Could this be used to make an advanced robot maid?
NEC FIP13N8 VFD Display datasheet needed  - Page 1
Forum section: electronics / general

author: razecus
author_rank: Newbie
timestamp: March 09, 2017, 10:16:36 am
content: Hello guys and girls,I have 2 VFD displays that came from two office calculator, like Walther 2202 PD, on the vfd say : NEC FIP13N8 ( its 13 symbols, 12 7segment and some symbols like M minus and an arrow taking one digit ). i want to use the in a project, thing is that i need to know some data about them, dose anybody know something about them? I did not had the full calculator to measure the voltages, and on the VFD side there are no electrolytic caps to figure it out. here is the board i haveAny advise is welcome,Thank you!
Open the iron burger skull - Page 1
Forum section: electronics / general

author: mtdoc
author_rank: Super Contributor
timestamp: March 10, 2017, 05:08:23 am
content: After watching Julian Illet do some soldering with one and out of sheer curiosity I ordered one ofthese $5 USB powered soldering pencils.It actually produces significant heat at it's tiny tip (8W!), it's construction is actually decent (given the price) and maybe it could do some soldering in a pinch (I haven't tried it yet!). But these instructions from the eBay listing are the best part. OK, we've all seen bad Chinglish but this one really had me chuckling:

author: MarkS
author_rank: Unknown
timestamp: March 10, 2017, 05:35:28 am
content: Well... There you go...

author: Ampera
author_rank: Super Contributor
timestamp: March 10, 2017, 06:24:07 am
content: Can I sue people for making me hungry?No?damn.

author: CJay
author_rank: Super Contributor
timestamp: March 10, 2017, 07:21:28 am
content: I've a week off work next week, we've planned to go for a 'dirty burger'* on one of the days and now I want it to be served in an Iron Skull.*http://www.almostfamousburgers.com/index.html
rectifier ramblings  - Page 1
Forum section: electronics / general

author: t_ryner
author_rank: Regular Contributor
timestamp: March 08, 2017, 11:14:54 pm
content: The other day, I had a interesting idea; would a full bridge rectifier work if you used different types of diodes? Of course, a LED rectifier may not be able to handle high voltages or current, but what about using a zener, schottky or even a tunnel diode?There's probably something I forgot, But just wondering.

author: mariush
author_rank: Super Contributor
timestamp: March 08, 2017, 11:42:38 pm
content: You can use shottky diodes and other types, but in some cases you may want to add some snubbers across the diodes, seehttp://www.hagtech.com/pdf/snubber.pdfBut why use diodes at all? Use an ideal bridge controller like LT4320 (http://www.linear.com/product/LT4320) with four mosfets and you're in business. Works only on <70v though.

author: Red Squirrel
author_rank: Super Contributor
timestamp: March 09, 2017, 01:33:31 am
content: I've used random diodes pulled from junk to create one. Pretty much any diodes will work, of course you want to respect the ratings etc and be aware of any voltage drop which will vary based on type.Recently did a Digikey order as I needed a part and figured I'd throw more stuff in there to make the shipping worthwhile, and threw in some discrete bridge rectifiers too along with other stuff. There's a million to choose from but here's what I went with:https://www.digikey.ca/product-detail/en/diodes-incorporated/GBJ2506-F/GBJ2506-FDI-ND/815161More than good enough for any mains application that would run on a regular household circuit.

author: Unknown
author_rank: Unknown
timestamp: March 09, 2017, 03:00:24 am
content: Quote from: t_ryner on March 08, 2017, 11:14:54 pmOut of all of those, a zener in particular might make things difficult if the reverse breakdown voltage is less than your incoming peak voltage. Above the reverse breakdown voltage, it would no longer be rectifying.
Mobile Phone  1979  - Page 1
Forum section: electronics / general

author: Benta
author_rank: Super Contributor
timestamp: March 07, 2017, 08:40:41 pm
content: The Nagra made me drool...

author: iainwhite
author_rank: Unknown
timestamp: March 07, 2017, 09:00:28 pm
content: I used to love watching Tomorrow's World back in the 60s and 70s
API Documentation (big company) - Page 1
Forum section: electronics / general

author: metrologist
author_rank: Super Contributor
timestamp: March 07, 2017, 06:46:01 pm
content: I was talking to an API developer about an API document. The developer is using visual studio and has downloaded the VSdocman plug-in to create an online Help for his APIs. The plug-in provides an icon button that will open a form dialog for him to complete some basic fields. The content is then injected into the source code, which is checked in to some kind of vault or...they use git. I know nothing about that, but need to learn about the software workflow... The Help file package is hand delivered to the web team to publish.anyway, that is one programmerAnother programmer is using VS too, but has found a different plug-in to use to create API documentation.Another programming team is using something else entirely, like 'cute' or some similar sounding Q name.All separate, independent teams doing their own things.There is a publications group that creates user manuals. The software managers want them to create all the documentation, but getting access to information is difficult, and the outputs of the systems being used in engineering do not provide a consistent type of data that can be easily reused. Maintenance is difficult since things like spelling errors persist in the code and never get fixed.How do big companies do this, where they are able to leverage things like re-use.Re-use is a key concept. Somehow it works with code. How do programmers find a little function to reuse among the sea of millions of functions? What if that function just needed a minor tweak to use in this new context? How is that code managed? And can it applied to user documentation in a broad systematic way? What tools are being used?Thanks for any insights....

author: rrinker
author_rank: Super Contributor
timestamp: March 07, 2017, 07:26:54 pm
content: Usually there is a standard set to that everyone is using the same tool, or at least the same format with the same level of detail and a common style. Even here were output of different people doesn't tend to get added together in a single document, we all start from a common set of base templates for documentation so it all has a similar look and feel no matter who did the actual document creation.
Validity of declaration of conformity - Page 1
Forum section: electronics / general

author: gaminn
author_rank: Frequent Contributor
timestamp: March 06, 2017, 05:27:40 pm
content: Hi,I have quick question. Is CE declaration of conformity valid when validity of a standard in the declaration of conformity ended and when the old standard was substituted by a new one?Do one have to declare conformity again (the product itself doesn't changed)?Thanks

author: Neilm
author_rank: Super Contributor
timestamp: March 06, 2017, 07:29:08 pm
content: You will have to declare to the new one.Note that the information required on the DoC changed last year, so possibly you should have redone it then.

author: rsjsouza
author_rank: Super Contributor
timestamp: March 06, 2017, 10:18:30 pm
content: Quote from: Neilm on March 06, 2017, 07:29:08 pmI can confirm that as well. For some products next year there will be a new round of re-classification...

author: Tomorokoshi
author_rank: Super Contributor
timestamp: March 07, 2017, 04:01:42 am
content: The standards change for reasons such as:1. Technical updates to cover emerging techniques and technologies2. Harmonization of equivalent standards between different regions3. Expenses for luxuries and vacations need to be paid for

author: jh15
author_rank: Frequent Contributor
timestamp: March 07, 2017, 05:47:48 am
content: shouldn't #3 be at top?

author: Jolle
author_rank: Contributor
timestamp: March 07, 2017, 01:06:21 pm
content: For information on the use of harmonised standards to show compliance with the essential requirements in the EU, I can recommend taking a look at the "Blue guide 2016". Regarding your question it is only the standards published in the EU Official journey (aka EUOJ) which is capable of giving you a presumption of conformity.But with that said harmonised standards are not mandatory, so in theory you could continue using the old DoC (making sure you comply with the correct directives of course) as long as you have a documentation showing your product fulfils the essential requirements, but by doing so you miss the advantage of presumed conformity and have a higher burden of proof on yourself. You can read more about using other means than HS in chapter 4.1.3 of the Blue Guide.How a confrontation with the market surveillance would end by keeping your old DoC I do not know, the safe path is to use the harmonised standards...
Here's a real DOH! moment for you - Page 1
Forum section: electronics / general

author: rrinker
author_rank: Super Contributor
timestamp: March 07, 2017, 01:42:50 am
content: Rearranged my shelves to make room for my new GMD-8251 and decided to play around and check ripple and see if there were any turn on spikes on my E3610 power supply. With the output set to 5V, all I got on my scope was a slight spike to about 1V before a smooth ramp to 5V. Hooked it to the 8251, DC matched the setting plus the extra decimal places, AC showed 1.2mv. Switched to my Fluke 45. DC matched, but I swear AC said .22mv. Checked both against my DMMCheck Plus, 8251 agrees within margin of error, 45 reads a bit high even by worst case error per manual, but DC reads fine, well within the error limits specified.But still puzzled, if AC in a 5V range reads several mV high, why is it showing the AC component on the power supply at 1/6 the value of the other meter? So I sit down to post about this andit wasn't .22mV, it was 2.2mV, I wasn't paying attention to the range it was using. So proportionally it's about the same error as the 5v AC from the DMMCheck. As expected. Oh yes, scope also showed 1.6mV p-p riding on the DC so here I was thinking 2 instruments say 1.6mV and one says .22mV, what gives. Mystery solved, next time pay attention to the range it selects, ya big dope.Also, if I plan to use the 45 for any AC measurements I should have it calibrated. Or just use one of the others that works.

author: Ampera
author_rank: Super Contributor
timestamp: March 07, 2017, 08:20:36 am
content: k.
Water Jet + Nintendo Switch = Magic? - Page 1
Forum section: electronics / general

author: askmyteapot
author_rank: Newbie
timestamp: March 07, 2017, 12:57:59 pm
content: This is something i came across....Using a water jet on a brand new Nintendo Switch console... and ... it was still functioning.Go figure.https://youtu.be/qBVyF0I2Ruo?t=2m36s

author: MK14
author_rank: Super Contributor
timestamp: March 07, 2017, 01:19:56 pm
content: Quote from: askmyteapot on March 07, 2017, 12:57:59 pmI asked your teapot, and they said they think the video is a complete waste of time, silly and crazy, simultaneously in equal measures. Some people have too much time on their hands, and money to burn.But anyway, Welcome to EEVblog forums.

author: CJay
author_rank: Super Contributor
timestamp: March 07, 2017, 03:15:16 pm
content: Quote from: MK14 on March 07, 2017, 01:19:56 pmOdd, my espresso machine told me looks like a transparent attempt at spamming to make money from youtube views.The toaster asked if it could be brought to a Mod's attention and deleted if they agreed.
Disposable drones... - Page 1
Forum section: electronics / general

author: HP-ILnerd
author_rank: Frequent Contributor
timestamp: February 03, 2017, 02:17:26 am
content: A peculiar idea..."...DARPA has funded several companies under its ICARUS (Inbound, Controlled, Air-Releasable, Unrecoverable Systems) program to create cheap, disposable drones that are designed to deliver a thing to a place and then be forgotten about. "http://spectrum.ieee.org/automaton/robotics/drones/otherlab-apsara-aerial-delivery-system

author: xrunner
author_rank: Super Contributor
timestamp: February 03, 2017, 02:22:58 am
content: Very interesting idea!

author: Bud
author_rank: Super Contributor
timestamp: February 03, 2017, 02:35:00 am
content: Thanks, there is also an article and a video on Amazon drones on that pagehttp://spectrum.ieee.org/automaton/robotics/drones/amazon-latest-drone-promoI do not think I may be a happy customer, 'cause of a hawk often sitting on the tree by my backyardand which my cat is scared of like hellAlso, not sure if it is even possible that delivery drones will ever be allowed to fly unattended.

author: Fsck
author_rank: Super Contributor
timestamp: February 03, 2017, 02:44:18 am
content: So, a crappy version of a guided bomb?

author: pickle9000
author_rank: Super Contributor
timestamp: February 03, 2017, 02:52:51 am
content: Deliver a thing? That would have to be poison or some other weapon.

author: Brumby
author_rank: Unknown
timestamp: February 03, 2017, 03:27:57 am
content: If it was a poison or biological agent - you wouldn't want it back.If it was a bomb ... it might be a challenge to find the bits, let alone have them fly back.

author: Guppzor
author_rank: Contributor
timestamp: March 06, 2017, 01:30:54 am
content: Well "the thing" could be many things, depending on the mission. Targeting beacons, sensor network nodes, surveillance and tracking devices, etc. More energetic cargo could be something like a single skeet from a CBU-97, or a set of FRAG-12 like bomblets. Non deployable cargo could simply be laser target designators for guided munitions.https://youtu.be/ndFKUKHfuM0Even unarmed, I feel that the sound of a swarm of these over you would be demoralising, especially if you knew that it signalled something a tad louder about to arrive...Sent from my GT-P5210 using Tapatalk
PSU Input? - Page 1
Forum section: electronics / general

author: E Schnieder
author_rank: Newbie
timestamp: March 06, 2017, 11:09:54 am
content: Hey all,first of all, English is not my first language, so I apologize for any misunderstandings and possibly bad explanations.I found this old PSU (FSPXXX-5DD01) in a computer that more looks like a DVD player. But since it has this weird DC inlet instead of the C14 inlet. Now my problem is that I don't know what sort of adapter I need to connect to the PSU to get the computer running, without burning out anything on this thing/at the adapter.

author: Codebird
author_rank: Regular Contributor
timestamp: March 06, 2017, 11:34:15 am
content: I've seen a couple of similar things before. They always seem to want 12V in, usually at a couple amps only as they aren't design for high-powered PCs. Generally you find them in car entertainment systems. Follow the power from the input to the 12V out - it probably goes almost direct, just a little filtering on the way.
LCD hunt - Page 1
Forum section: electronics / general

author: mOSkit
author_rank: Contributor
timestamp: March 05, 2017, 06:03:51 pm
content: Hi Guys.Im looking for replacement lcd like the one shown on the picture. I have no info who could make or was it a custom design.If any one ever came across than could you please help me finding replacement.thank yo

author: nctnico
author_rank: Super Contributor
timestamp: March 05, 2017, 06:15:37 pm
content: For us to be any help you have to tell us what piece of equipment this display is from and if possible show a picture with it's configuration (segments and indicators).

author: mOSkit
author_rank: Contributor
timestamp: March 05, 2017, 06:25:48 pm
content: Hi.So its autoloc air8000 air ride controller.The chip on the back is samsung 3p825axzz - tw8a 12bg1mm

author: JacobPilsen
author_rank: Regular Contributor
timestamp: March 05, 2017, 06:39:46 pm
content: Custom design...Thankfully it is mainly seven-segment numbers.You could try LCD from ordinary calculator.If you wire it in correct order, you could see at least some digits.

author: mOSkit
author_rank: Contributor
timestamp: March 05, 2017, 06:44:04 pm
content: I was really hoping that some of the graphic LCDs will work. 😑

author: CJay
author_rank: Super Contributor
timestamp: March 05, 2017, 06:47:26 pm
content: Have you tried contacting the manufacturer? It's a current product and they may be able to supply spare parts.

author: NivagSwerdna
author_rank: Super Contributor
timestamp: March 05, 2017, 06:51:21 pm
content: Indeed looks like custom glass. I would say you should try the original manufacturer. For such an expensive product they should have decent technical support.As for the glass itself.... There are a few variables... how many ways is it multiplexed? How are the elements commoned? You could tickle it with a 3V pp 100Hz AC signal and see what you can get out... make sure it is AC and has no DC component otherwise you'll risk damaging it further.

author: mOSkit
author_rank: Contributor
timestamp: March 05, 2017, 06:51:51 pm
content: I've emailed them. Got to wait and see.
Arghh, iphone to Android Whatsapp message transfer - Page 1
Forum section: electronics / general

author: CJay
author_rank: Super Contributor
timestamp: March 05, 2017, 12:28:36 pm
content: OK, so I've had and used Android phones almost exclusively for the past five or so years and have never had problems.But, my partner is a new convert after a dreadful experience with the iPhone 6 (i don't want a platform war, Android works for me, iPhone worked for her until recently and we were both happy with the choices we'd made)So, where we are stuck is in transferring all her Whatsapp chats to the new phone, there seems to be no mechanism to do this?We can back them up to iCloud on the iPhone, I can back mine up to Google Drivebut it seems never the twain shall meet and there's no way to transfer them between, there are plenty of 'guides' out there which are essentiall just ads for rather expensive applicatons of rather dubious facility, some of them require one or both phones to be rooted.Does anyone here know of a way to transfer the whatsapp message store or if it's even possible?(the conversations are especially important as one of them is with a friend who died last year)
Can you help me identify this connector ? - Page 1
Forum section: electronics / general

author: Vicne
author_rank: Newbie
timestamp: February 28, 2017, 12:15:32 am
content: Hi,I would like to sniff signals on the following connector. I looked on farnell and RS but even with the right filters, I could not find the matching plug.The pitch is 2mm and, as you can see, it is keyed by both one large notch on the top and two small notches on each side, but as I just need a female plug, I don't really care about the notches as long at fits in...Any hint is welcome.Kind regards,Vicne

author: Kobus
author_rank: Contributor
timestamp: February 28, 2017, 11:34:50 pm
content: It looks like it may be a JST PH serieshttp://www.digikey.com/product-detail/en/jst-sales-america-inc/S6B-PH-K-S(LF)(SN)/455-1723-ND/926630Digikey has some matching plugs listed on this page.Good luck

author: Vicne
author_rank: Newbie
timestamp: March 05, 2017, 11:02:00 am
content: Sorry for the delay.Thanks a lot, It looks very much like it indeed ! I'm going to order the matching plug.Kind regards,Vicne
Macrium Reflect, for the win! - Page 1
Forum section: electronics / general

author: John Coloccia
author_rank: Super Contributor
timestamp: March 04, 2017, 02:47:45 pm
content: Just uninstalled Acronis Backup 11.7, and I feel like a weight's been lifted off my shoulders. It's slow, it's a resource hog (it's CONSTANTLY doing something...all the time, constantly. WTF?). It does wacky things like fails an archive on validation, but then continues to blindly make differential and incremental backups from it. Again, WTF? It's ONLY job is data integrity...that's it. FAIL.I'm just using the free version of Macrium at the moment. The compression is better, the backups are much faster, and it just sits there quietly doing nothing when it's not running. I can't believe I lived with that Acronis garbage for years.Also, Ubuntu's Unity still sucks. Yesterday I installed it in a VM, just to try it. It's slow as molasses, and after an hour of doing practically nothing (some web browsing, and stuff like that) it pops up an error that says something like, "An error occurred. You should probably reboot." It literally said "probably reboot". Seriously? And what's with the little default Amazon button on the launch bar?And Mint Cinnamon still rocks.OK, that's all for my Saturday morning rant.

author: Jeroen3
author_rank: Super Contributor
timestamp: March 04, 2017, 02:56:33 pm
content: Can confirm. Bought family pack for all pc's. Excellent software.Used it to clone to many ssd's for people too.

author: Ampera
author_rank: Super Contributor
timestamp: March 04, 2017, 05:36:07 pm
content: Yeah. Funny story, I bought a 500GB Samsung SSD (SATA), and the migration software that came with the SSD was NOT cloning. It deleted the data it copied, which I thought was incredibly risky.Reflect was way better, as it cloned the disk, not just deleted and moved it.
The Source of Uncertainty - Page 1
Forum section: electronics / general

author: bitwelder
author_rank: Super Contributor
timestamp: March 04, 2017, 07:48:47 am
content: Got via tweet a link to this pictureOrigin:A quick search on 'source of uncertainty' finds the webpages of Buchla, which makes modules like those:https://buchla.com/product-category/modules/It's a knobbly nirvana!

author: bibz
author_rank: Contributor
timestamp: March 04, 2017, 01:35:07 pm
content: Yup a modular synth piece of awesome. Buchla and Moog were the pioneers of electronics as a musical instrument. West coast (buchla) and east coast (moog). Seeing 'fluctuating random voltages' immediately made me want it for my diy modular, I'm sure theres a DIY schem out there for some of this stuff.That being said we can thank china for including some or all of this module in many of the things they make
Try to explain this... - Page 1
Forum section: electronics / general

author: ProBang2
author_rank: Frequent Contributor
timestamp: March 06, 2017, 04:23:28 am
content: I don´t link to this video, because it is a teardown.(Meh, just another cheapie...)I link to this video, because this DMM is eating fuses.And your mission, if you should choose to accept, is:Try to explain, why?(My first guess: Gremlins...)http://youtu.be/JiqByQkjXB8

author: MarkS
author_rank: Unknown
timestamp: March 06, 2017, 09:22:02 pm
content: My guess is that it is due to poor circuit board design. Possibly an issue that if not for the fuses would have resulted in the magic smoke being released some time ago.Look at the LED isolator as evidence of this. This isn't a bodge; They designed the board like this. Why? They couldn't figure out how to route around a tiny optoisolator? What else did/didn't they do to that board?

author: rsjsouza
author_rank: Super Contributor
timestamp: March 06, 2017, 10:16:27 pm
content: My guess is similar to MarkS: bad board design. When the meter is assembled I suspect that somehow the +VBATis shorted to the mA input which causes the fuse to blow instantaneously (a 9V battery can easily supply 500mA, especially in such short period of time).All in all, I would be very concerned about using this meter anywhere as I would probably be second guessing anything it measures.

author: FireFlower
author_rank: Regular Contributor
timestamp: March 06, 2017, 10:24:27 pm
content: Actually I have tried, 9V battery can give out 9 amps...Wondered once how much shorted out 9V battery gives, so my bets are also with battery being shorted trough fuses.
Ebay hakko 191, any good/somehow legit? - Page 1
Forum section: electronics / general

author: XOIIO
author_rank: Super Contributor
timestamp: March 04, 2017, 03:14:18 am
content: Hey all, so I can't recall where I saw a hakko 191 in a video, but I just remembered it and checked the pricing on ebay and man they seem super cheap, in fact I couldn't see any over $20 without sorting by distance first.I'm curious if this was just a super common thing and there is a whackload of discontinued inventory, or, in more likelyhood, it's knockoffs.My question is, does anyone have a legitimate and fake one that they have compared to see what the differences are, and if the ebay ones are worthwhile?

author: helius
author_rank: Super Contributor
timestamp: March 04, 2017, 03:36:53 am
content: Of course they are fake. It's ultimately a simple device, but the tempco and selection of the components is what makes it suitably accurate or not. Hakko has a reputation and can be trusted to use quality parts, the fakes not so much.

author: klh2000
author_rank: Newbie
timestamp: March 04, 2017, 03:37:33 am
content: The cheap ones on eBay are fake, but big clive uses a fake, it seems to work alright for him.

author: XOIIO
author_rank: Super Contributor
timestamp: March 04, 2017, 03:50:28 am
content: Quote from: klh2000 on March 04, 2017, 03:37:33 amAh that's who had it.

author: VK3DRB
author_rank: Super Contributor
timestamp: March 04, 2017, 05:54:24 am
content: There was the case of a woman in Australia who designed T-shirts with her own copyrighted creative artwork on them. She opened a shop and did excellent trade selling them. Within a couple of months, other shops were selling Chinese counterfeits of her work at a fraction of the price. Sadly, as a result she went out of business and she unable to afford to sue the bastards importing the copies.There is no issue with buying aftermarket spares if the OEM is ripping you off with spare parts for an unreliable product.But in general, buy the genuine article or don't buy it at all. If you invented a device, you'd be very upset if some tosser copied it and was illegally profiting from it.
Japanese micro smd on normal pitch techniques - Page 1
Forum section: electronics / general

author: Kjelt
author_rank: Super Contributor
timestamp: March 02, 2017, 11:04:15 pm
content: https://youtu.be/i5MNLTc7YhY

author: dave_k
author_rank: Frequent Contributor
timestamp: March 03, 2017, 01:35:30 am
content: What a bunch of crap

author: eugenenine
author_rank: Frequent Contributor
timestamp: March 03, 2017, 01:47:57 am
content: Paste the link in the tor browser and it works fine.

author: MarkS
author_rank: Unknown
timestamp: March 03, 2017, 02:57:59 am
content: I HATE region locking! There are NO legitimate reasons for that nonsense. The really sad thing is that getting around a region lock is a violation of the DMCA, so us U.S. viewers have to juggle whether taking the risk of a criminal conviction is worth the video content.

author: rrinker
author_rank: Super Contributor
timestamp: March 03, 2017, 01:58:51 pm
content: It's not really YouTube, it's (once again) record labels trying to hold on to a dying method of distributing music. This time Japanese record companies. RIght up there with the banning of live streaming gameplay of certain games, just to 'protect' the music.http://kotaku.com/youtube-copyright-nonsense-hitting-yet-another-communit-1745318795Absolutely ridiculous.
Alternative use for cheap USB current monitor from China - Page 1
Forum section: electronics / general

author: mrcrud5
author_rank: Contributor
timestamp: February 17, 2017, 08:03:50 pm
content: I bought a cheap little USB current meter from ebay, and I used it as a current indicator for a homemade powersupply I made a while ago that has no voltage or current indicator. I'm sure some of you out there also have a homemade power supply that has current display. I made a little blog post on my website about it.https://www.mrelectronics.net/single-post/2017/02/17/Alternate-use-for-cheap-USB-current-meter

author: Galenbo
author_rank: Super Contributor
timestamp: March 01, 2017, 10:22:35 am
content: Why not use this? It's only 2.56 eurohttps://www.aliexpress.com/item/0-28-Red-Blue-LED-DC-0-100V-10A-Dual-display-Meter-Digital-Voltmeter-Ammeter-Volt/32428900529.html

author: bktemp
author_rank: Super Contributor
timestamp: March 01, 2017, 10:27:55 am
content: Quote from: Galenbo on March 01, 2017, 10:22:35 amBecause it is useless for low current stuff:Quote

author: Galenbo
author_rank: Super Contributor
timestamp: March 01, 2017, 10:42:17 am
content: Quote from: bktemp on March 01, 2017, 10:27:55 amah, ok, I didn't know that you wanted to do that.How low do you want to go, and what's the required accuracy ?the same cheapie also exists in 1A/0.01A

author: Rick Law
author_rank: Super Contributor
timestamp: March 03, 2017, 06:01:03 am
content: Quote from: bktemp on March 01, 2017, 10:27:55 amIt would really depends on the meaning of "low current." I found these USB testersgood enough for voltage but not friendly enough for currentbelow 50mA. For breadboard stuff, when I do need to know about current, I usually needs it in the 100mA to 2A range with +- 5mA. My "go-to" solution is a Nano+INA219.The USB tester cited by the OP appears to be theJ7-tthatHKJreviewed.HKJ's result is this:- Voltage display is within0.03 voltin the 4.0 to 6.0 volt range.- Current display is within0.02 amperein the 0 to 3.0 ampere range with 5 volt supply.http://lygte-info.dk/review/USBmeter%20safety%20tester%20J7-t%20UK.htmlWith "low current" accuracy at +- 20mA. this is one of the better ones. Twice as good as my USB doctor at +-40mA. Can't call it great at +-40mA, but good enough to give me some idea how the charging is going.
micro controller - Page 1
Forum section: electronics / general

author: annapurna
author_rank: Newbie
timestamp: March 03, 2017, 02:42:49 pm
content: I am using a 3 phase interleaved buck converter with closed loop operation (100000 Hz).For this i selected tms320f28027f processor.Now my doubt is how to select the sampling frequency of the processor.According to sampling theorem,i found that fs>2fm .so it should be greater than 200000 Hz.Am i correct?If not please tell me how to select it for my application.Thankyou in advance............................

author: Benta
author_rank: Super Contributor
timestamp: March 03, 2017, 07:22:33 pm
content: Unfortunately, you've only been presented with the simplified sampling theorem.The real sampling theorem states that the sample rate should be higher than two times the maximumbandwidthof the sampled signal, which is not the same as two times the maximum frequency.Undersampling is possible and used in telecom and RF applications all the time.Example: you have a 50 MHz modulated carrier, bandwidth-limited to 500 kHz. Sampling this at 1 Msps is perfectly feasible. Your front-end/sample-hold will need to be able to process the 50 Mhz, though.
Do you think this guy is BS? Claims three alpha from C12 fision - Page 1
Forum section: electronics / general

author: raspberrypi
author_rank: Frequent Contributor
timestamp: March 01, 2017, 08:24:14 pm
content: This video seems too dumbed down to get any real info out but here is an interesting comment they came back with:Video:Me:QuoteThem:QuoteMe:QuoteThem:QuoteSo what he is saying is that the mass difference in a proton added to a B11 to transmute it to a "meta" C12, is so great it falls apart.But a proton is slightly lighter then a neutron so the energy would have to come from kinetic energy of the proton. If we follow our good friend Einsteins equation as he says, logic says that there would be a MASSIVE amount of energy to get that proton up pass the neutrons mass plus enough to overcome the _S_trong nuclear force. Well we have a speed limit of c for the proton but that limit does approach infinite mass as we reach it.What I find suspect is that he won't say how many MeV we need to get that proton up to, to make a meta C12 fall apart if there even exists a mechanism to do this. Fission of stable light isotopes? Sounds like BS.https://youtu.be/2oSRu6mxauw

author: raspberrypi
author_rank: Frequent Contributor
timestamp: March 01, 2017, 08:31:05 pm
content: p + B11 -> 3He(Alphas) But how many Mev is the proton and the 3 alphas? That would be a massive magnetic field would it not? We use neutrons to irradiate for a reason.
5G networks artificial superintelligence by 2020 mobile world congress - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: March 01, 2017, 02:45:31 am
content: the global brain project? electronics in everything? chips in your clothes, chips in your shoes.just hype? or is there truth in all this?video from the mobile world congress barcelona 20172017 Broadcast technology television systems now obsolete?also ownerless cars ride-sharing technology behind driverless carsRobot reproduction technology. Robots build offspring.please discuss this. will we have a global network brain?do we even need one?radio spectrum congestion. will the global 5G network push out other users from the spectrum? Ham radio?
OT Whopping salary of Australian postal service boss sparks furor - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: March 01, 2017, 03:01:50 pm
content: This made headlines in the US. Curious what opinions Australians might have.http://www.usatoday.com/story/news/world/2017/03/01/whopping-salary-australian-postal-service-boss-sparks-furor/98570596/Pay was in US$$4.3 million / year, US counterpart $416,00010 X the Prime Ministers pay? How is that possible?

author: BradC
author_rank: Super Contributor
timestamp: March 01, 2017, 03:06:35 pm
content: Quote from: Homer J Simpson on March 01, 2017, 03:01:50 pmPretty much has to be the boards fault. He was offered a salary of a metric shit-ton to start with and it grew to an imperial shit-ton over his tenure. Somethings wrong somewhere, but hey he made out well and pulled the pin when the excrement hit the rotary air distributor.

author: RGB255_0_0
author_rank: Frequent Contributor
timestamp: March 01, 2017, 03:07:11 pm
content: Quote from: Homer J Simpson on March 01, 2017, 03:01:50 pmCorporate greed.

author: Brumby
author_rank: Unknown
timestamp: March 01, 2017, 03:54:23 pm
content: Have you heard the rumour as to where he might be going....?

author: Brumby
author_rank: Unknown
timestamp: March 01, 2017, 03:55:45 pm
content: IS OUTGOING Australia Post chief AHMED FAHOUR headed for Amazon for its arrival on these shores later this year?That is one rumour doing the circuit of the Melbourne business community.http://www.heraldsun.com.au/news/victoria/page-13-rumours-ahmed-fahour-heading-to-amazon/news-story/a017866d7f2fe623fb6441b16cdccdbc
Sending Prototypes Internationally - Page 1
Forum section: electronics / general

author: @rt
author_rank: Super Contributor
timestamp: March 09, 2017, 04:30:00 am
content: Hi Guys,I’m interested in sending a hand made protoboard overseas, which is ESD sensitive and fragile.I’m sure I could pack them well, but have reservations about US Customs, especially if they X-ray and see inside.Suddenly my vision of the customs people look like these guys.Does anyone have experience with this?
alternatives to snubber circuit - Page 1
Forum section: electronics / general

author: annapurna
author_rank: Newbie
timestamp: February 27, 2017, 01:25:04 pm
content: My mosfet open circuit voltage- 400 volts.Switching frequency-70000I am not using Snubber CIRCUIT to eliminate ringing .Are there any other options to eliminate ringing.Now i am using an active clamp circuit(tvs diode between Gate and Drain).I don't want to waste power at snubber circuit.Am i correct with TVS Diode?Please suggest me how to deal with this ringing.

author: wraper
author_rank: Unknown
timestamp: February 27, 2017, 01:37:33 pm
content: You didn't even tell what sort of the circuit it is. My guess would be probably flyback SMPS but who knows. It might be switching purely resistive heater as well, considering your detailed description.

author: Neilm
author_rank: Super Contributor
timestamp: February 27, 2017, 08:09:45 pm
content: More information required.Google "Lossless snubber networks". In flyback appications it is a capacitor, an inductor and two diodes. This captures the energy of the spike and returns it to a capacitor on the supply.

author: annapurna
author_rank: Newbie
timestamp: February 28, 2017, 03:04:29 pm
content: i am using a non-isolated buck converter.please suggest us
Why Does Foot Pedal Reduce Top Speed of Universal Motor? - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: February 26, 2017, 08:23:46 pm
content: So long, and thanks for all the fish.

author: Benta
author_rank: Super Contributor
timestamp: February 26, 2017, 08:54:43 pm
content: I think you need to provide a bit more detail. I have difficulty visualizing your setup.Cheers.

author: rollatorwieltje
author_rank: Unknown
timestamp: February 26, 2017, 09:14:57 pm
content: Is it a carbon pile rheostat? Those often have up to several ohms of resistance even when fully pressed. If it's a wiper based unit, it could be that it doesn't use the entire range.

author: IanB
author_rank: Super Contributor
timestamp: February 26, 2017, 11:45:52 pm
content: The pedal certainly has a problem. It reduces the top speed because when fully depressed it still limits the power to the motor. It may be faulty, or it may have been designed that way. Most speed controllers will provide the full, unrestricted AC voltage on the output when on the maximum setting.If you want to troubleshoot it you will need to take it apart and see how it is constructed inside, and then you will need to reverse engineer the circuit to find out why does not provide unrestricted power on the max setting.

author: james_s
author_rank: Super Contributor
timestamp: February 27, 2017, 01:35:00 am
content: Are you sure it's a simple rheostat and not a triac or SCR speed control? 1/6HP seems awfully large for a rheostat, it would be burning off a lot of excess power as heat at lower speeds.

author: Brumby
author_rank: Unknown
timestamp: February 27, 2017, 01:54:51 am
content: Quote from: Roy Batty on February 27, 2017, 01:23:58 amThat's one of the options already mentioned above - BUT -there is more than one way to implement motor speed control.To offer any real help here, we would need to know what system is used. The easiest way to start down that path is to take a cover off and take a picture of what's inside.

author: Brumby
author_rank: Unknown
timestamp: February 27, 2017, 01:59:10 am
content: The other thing to keep in mind is that -if the speed controller works well for the device that it came with, then the sub-maximum power limit may be a real, deliberate design feature to ensure the original device operates within it's intended capabilities.As a result, if you modify the controller to give full speed to other equipment and then connect it to the original device, you might drive it to destruction when you put your foot all the way down.

author: johnwa
author_rank: Frequent Contributor
timestamp: February 28, 2017, 09:36:39 am
content: Quote from: james_s on February 27, 2017, 01:35:00 amYes, this may have something to do with it. I think some power tools with an inbuilt speed control use an SCR, that can only pass positive half cycles, and therefore the maximum effective output voltage is only 1/sqrt(2) that of the line voltage. The universal motors are then wound for full speed operation at e.g. 170V (for a 240V system). Running a motor designed for 240V from such a speed control would mean that it would not be able to reach full speed.
Question about pictures - Page 1
Forum section: electronics / general

author: vasi_ro
author_rank: Unknown
timestamp: February 26, 2017, 09:35:32 pm
content: How can i alternate pictures and comments like robrenz did on this topic :https://www.eevblog.com/forum/testgear/hp-3410a-ac-microvoltmeter-restoration/?

author: PA0PBZ
author_rank: Super Contributor
timestamp: February 26, 2017, 09:43:03 pm
content: Attach the pictures to your post, then get the properties of the (expanded) pictures and put them in your original post using the img tags using the modify button

author: grumpydoc
author_rank: Super Contributor
timestamp: February 26, 2017, 10:15:13 pm
content: Quote from: PA0PBZ on February 26, 2017, 09:43:03 pmOr host the pictures on another website first, then use the img tags to embed them in your post.Bonus points for embedding a small(ish) thumbnail in your post which acts as a link to the full res version when clicked - this saves people's bandwidth if they do not want to download large images.

author: vasi_ro
author_rank: Unknown
timestamp: February 26, 2017, 10:30:54 pm
content: Thanks for replyIt's easy with an image hosting web, but the pictures can dissaper anytime or some users can't see and for this reasons i prefer to attach on forum.

author: tautech
author_rank: Super Contributor
timestamp: February 26, 2017, 10:47:22 pm
content: Quote from: vasi_ro on February 26, 2017, 10:30:54 pmMe too.Just be mindful of the size of images you want to upload to Dave's server AND the the time and BW it will take for a large (Mb) image to download when embedded in your posts. Not all members have fast internet connections and big images can take an age to download, the thumbnails not though.Use big images when great detail is required however in most cases 100 Kb is plenty to see enough detail.As others have said use the URL of the thumbnails to embed images and ensure they're within the img tags. (Insert Image)

author: vasi_ro
author_rank: Unknown
timestamp: February 26, 2017, 10:57:37 pm
content: About the internet bandwith... sorry ... but sometime i forget that i live in Romania. Internet here is amazing and very very cheap ! My fiber optic 1Gbps is less the 15euro /mounth.
DG1022 Old Firmware - Page 1
Forum section: electronics / general

author: Paul_Elec
author_rank: Newbie
timestamp: February 26, 2017, 01:25:22 pm
content: Hi everyone,I am having an issue with updating my old DG1022 which developed an issue following firmware update. I didn't have any answer on the "instrument" forum" and hope to be more successful here. Rigol customer service has been receptive but unable to help due to the age of the instrument (10 year old now).Anyone would have the old firmware 00.01.00.04.00.02.03 available by any chance?Thanks in advance.
Software for generating waveforms. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: February 24, 2017, 02:52:29 pm
content: Is there an software for creating waveforms in order to be used in a manual etc?Most of the time I use LtSpice with arbitrary voltage sources etc. But for waveforms like the one bellow...Alexander.

author: Vtile
author_rank: Super Contributor
timestamp: February 24, 2017, 03:39:51 pm
content: Any math program should do? Matlab, Maxima, Maple ... Excel, OpenOffice Calc, GnuPlot what there is these. What they expect as a input data is what rules some of them out.Your waveform in question is a variation of f(x)=tan(x)..Or are you asking a program that allows you to draw by hand the waveform.

author: Ampera
author_rank: Super Contributor
timestamp: February 24, 2017, 03:51:32 pm
content: Google! Just input your waveform you want to graph, and it will do it. Seriously.https://support.google.com/websearch/answer/3284611?hl=en#plotting

author: rstofer
author_rank: Super Contributor
timestamp: February 25, 2017, 05:10:23 pm
content: I use desmos.com for graphing but I haven't had success at saving a simple image. I can save the entire .html but that is pretty much useless.You can certainly do the same thing with wxMaxima and there are a couple of graphing formats. The first attached image uses the 'inline' format. The second image uses the gnuplot format and it is a separate window. Both approaches have a lot of options for sizing, legends, labels and so forth.

author: shteii01
author_rank: Frequent Contributor
timestamp: February 26, 2017, 01:23:11 am
content: Hit Print Screen (if you have multiple windows open, hit ALT+Print Screen to capture active window), then Paste to your favorite graphics editing program (and no, I don't mean stupid M$ Paint), edit the pic, save the pic.I recommend IrFanView graphics editing program. If you need fancy, White Rabbit version for Photoshop might still float around the internetz.Quote from: rstofer on February 25, 2017, 05:10:23 pm
issue between the power ground and signal ground - Page 1
Forum section: electronics / general

author: annapurna
author_rank: Newbie
timestamp: February 24, 2017, 06:28:24 am
content: can we connect power ground and micro controller ground?what will happen if we make the ground common for both?please provide some references to understand it properlythankyou.......

author: T3sl4co1l
author_rank: Super Contributor
timestamp: February 25, 2017, 01:10:02 am
content: Unless you are an expert, NEVER SPLIT GROUNDS. You are almost always better off using one, large, very solid, ground for everything.Solve interference issues by not overlapping parts of the circuit.Tim

author: b_force
author_rank: Super Contributor
timestamp: February 25, 2017, 06:54:05 pm
content: Well eventually you need to connect all ground together.The question is where. Normally you do this at the point of the exit of the power supply, which you use a big star.But sometimes you can also use local stargrounds.If it's really all just digital, i would probably make one big ground plane.If it's mixed (analog and digital), than you have to do some more work.