hybridfree/eevblog-posts huggingface dataset:
Microsoft tampering with Search Engine - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: July 10, 2012, 01:42:40 am
content: Microsoft sulking at the imposition of a tax upon users of their POS browser has struck back by tampering with their POS search engine.The real irony being that the only people stupid enough to use Bing are the ones likely to still be using IE7.http://www.dailytelegraph.com.au/technology/microsoft-bytes-back-kogan-disappears-from-bing/story-fn7bsi21-1226422268612While the number who have heard of or purchased from Kogan is tiny it still has to be orders of magnitude greater than those who know no better than to rely on Bing.

author: Fallingwater
author_rank: Contributor
timestamp: July 10, 2012, 02:18:14 pm
content: Does anyone use Bing at all? I've never seen it used, even by the sort of PEBKAC people whose computers I'm always fixing. When your engine's name has entered the dictionary as a synonym for "searching online", it tends to have an effect.

author: PeterG
author_rank: Frequent Contributor
timestamp: July 10, 2012, 02:38:18 pm
content: I have known about Bing since it was created by Microsoft, however i have no need or desire to move from using Google.I always get an uneasy feeling whenever Microsoft come out with new things.Regards

author: G7PSK
author_rank: Super Contributor
timestamp: July 10, 2012, 02:43:20 pm
content: Some software tries to install a Bing search bar when installing Also if you put a fresh install of windows on a computer Bing tries to worm its way in along with IE. I have found that IE often comes back after I have removed it with the next load of updates shortly after the fresh installation is done.

author: SeanB
author_rank: Super Contributor
timestamp: July 10, 2012, 03:36:52 pm
content: I have a few people who use Bing, they like the wallpaper it has...........

author: caroper
author_rank: Regular Contributor
timestamp: July 10, 2012, 04:58:53 pm
content: I installed 3 new workstations today.I booted them up, selected region and keyboard settings, opened IE to ensure they had found the router and they all said Congratulations your Bing Bar is installed.I had all 3 running Chrome as default browser and Goggle as default search before I had finished installing the AntiVirus softwareIt must have been an instinctive revulsion reflex
screen printing video - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: July 13, 2012, 08:31:49 am
content: wouldn't be too expensive to set up

author: chrome
author_rank: Regular Contributor
timestamp: July 13, 2012, 05:25:56 pm
content: I don't believe any professional company uses this method, there has to be a better way right?Especially the bricks part.The voice over was kinda hard to understand at some/most parts.I LOL'ed at the "SUCCES!" at the end though.

author: SeanB
author_rank: Super Contributor
timestamp: July 13, 2012, 05:46:15 pm
content: Well, the factory setup was done on a shoestring, using whatever was around. They are doing something right, as they are still in production, and are pushing out product. Perhaps not exactly correct OHS wise, and possibly there should be more done with the waste stream they generate, both solid and liquid.Loved the hairdryer for all purposes, who knows, they might even use it to dry hair as well in the evenings.

author: codeboy2k
author_rank: Super Contributor
timestamp: July 13, 2012, 08:07:43 pm
content: I think this method might be really good for making PCB's at home too. Screen printing is way easy, if you've never taken a college art class about screen printing you should sign up and have a go, if you want to make PCB's this way.In the past I did screen printing with an Xacto knife cutting away at acetate or some such to make letters, which we subsequently printed on T-shirts. I liked the way they did it using the UV paint emulsion on the threads and washing it away to make the positive artwork from the negative (which looks like a photo negative, which is also very easy to develop yourself in a darkroom)Being able to use the same screen printing technique for the resist, soldermask and silkscreen keeps your chemicals and station count down at home. Plus almost everything can be done in the open light, and hardened under UV, and that makes it easy to work with.They are using a screen with 120 threads-per-inch (0.008333", a little more than 8 mils), but it's probably not possible to get 8/8 line and spacings, maybe you can get 10/10 or better.I don't make boards anymore at home, but when I did I used a photographic method, with photosensitive boards that I coated myself and contact printed artwork on light sensitive A4 sheets from Kodak. Back then (70s. 80s. ) I didn't even do soldermask or silkscreen legends, even though at that time I did have experience with silkscreening, just not on PCB's
No More Little Green Apples - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: July 10, 2012, 02:01:02 am
content: Greetings EEVBees:--Apple asks EPAT to remove all products from its list of certified Green products.http://blogs.wsj.com/cio/2012/07/06/apple-removes-green-electronics-certification-from-products/--They are busy filling up the moat in Cupertino, since by nightfall villagers with pitchforks and flaming torches are expected to arrive demanding the head of the Frankenbook Monster, thought guilty of inducing multiple suicides in Shenzhen, as charged in a retracted NPR article. More importantly Frankenbook is thought not to be completely recyclable. Unsubstantiated and unverified rumors hint at possible meetings between Levinson and Miscavige to discuss a security alliance, now that Apple's free pass with the forces of Anti-Capitalism has expired. No word as yet from Apple board member, and and carbon magnate Al Gore."Please don't be alarmed. I am only attempting to break into the safe."Isakura A. Moto - From "Thank You Mr. Moto" with Peter LorreBest RegardsClear Ether

author: free_electron
author_rank: Super Contributor
timestamp: July 10, 2012, 03:05:15 am
content: Nah , they got plenty of padding in their 'sheeple' forming a happy happy circle around the fort. the moat is filled with cool-aid and it's gonna be an all-night party ...
Electric Race 2012  - Page 1
Forum section: electronics / general

author: lgrfbs
author_rank: Contributor
timestamp: July 07, 2012, 08:53:22 pm
content: I are a rarely visitor here, but I really enjoy the EEVblog videos on the youtube, so therefore this post.CompetitionBegin: 2011-07-15 Kl. 20.00 GMT +1Time leftEnd: 2011-08-04 Kl. 06.00 GMT +1It must be at lest 5 gamers singed up for the competition to be on with prizes. 5 gamers and prize will be given to the top 3 gamers.Trackmania Nations ESWC is a car racing game, this competition is about the best time on most tracks.The competition cover 5 to 20 tracks that is total new, the tracks can be viewed atlgrfbs game page.All tracks shall be ready and tested before 2012-06-30.Date for application2011-06-30 Kl. 01.00 GMT +12011-07-14 Kl. 19.00 GMT +1The server will be taken down for reconfigure for the competition.You sing-up by:Start the game and select country "Sweden".Then the list over available server shows, select "lgrfbs server" click "Join" for get in on the server.Press space for type this in game chat:/join Electric_Race_2012 <1> <2><1> = This is the contact informations as email/IM or SEF name, spacing are not legal character in any field.none registration fee will be needed for attend in the i competition.<2> = If you are a guest of some one as all ready is in the listThis link shows who are in the competition. This list updates from the script in gameprizeThe prize for the winner is an optionalpostcakeand the right to brag about the prize. :-)1st price/placethree Bredboard2nd price/placetwo Bredboard3rd price/placeone BredboardAll detail information and prize onmy wiki page

author: lgrfbs
author_rank: Contributor
timestamp: July 09, 2012, 08:19:27 pm
content: The prizes:+ one postkaka
Transformer Design Kits? - Page 1
Forum section: electronics / general

author: David
author_rank: Frequent Contributor
timestamp: July 09, 2012, 07:30:02 pm
content: Hi all,Does anyone know of any transformer design kits that are available to purchase? I need to prototype some EE16/EE20 core transformers and experiment with a couple of different bobbins etc. The only kit I have come across so far is one from Wurth Elektronik (Page 9:http://products.midcom-inc.com/News/Speedy_Design_Service.pdf) but I am wondering if anyone knows of any others before I just purchase the parts separately.Regards,Dave

author: David
author_rank: Frequent Contributor
timestamp: July 10, 2012, 08:52:59 pm
content: Looks like wurth midcom are the only guys that make these
Current testing of battery powered products.  - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: July 09, 2012, 03:35:41 pm
content: This is not really a project just something I knocked up for testing current draw of batteries without having to mess with trying to hold probes and batteries and circuit under test. it is just two strips of copper foil bonded back to back with double sided sticky tape and two wire soldered on, it is inserted between the battery and terminal and the meter is connected to the wires, very quick and easy.

author: N2IXK
author_rank: Frequent Contributor
timestamp: July 09, 2012, 07:24:48 pm
content: Been using a sliver of double sided copper clad PC board material for the same purpose. Works great!
Megger (insulation resistance tester) needed (UNI-T UT502 an option?) - Page 1
Forum section: electronics / general

author: larry42
author_rank: Regular Contributor
timestamp: July 07, 2012, 11:39:48 pm
content: Hi, recently I needed a megger for insulation testing (2500V) for some small scale testing of a unit for a customer.The Fluke and Megger ones are expensive (1500-2500 USD) when you need >1000V.I've seen plenty of cheap ones on Ebayhttp://www.ebay.com/itm/UT502-Insulation-Resistance-Tester-2500V-20G-ohms-/261048675881?pt=BI_Electrical_Equipment_Tools&hash=item3cc7b6ae29Specifically the UNI-T UT502 looks like it does what I need. I know that UNI-T do multimeters of varying quality.I'm *very* skeptical of buying something that outputs 2500V from a low cost Chinese brand, moreover I wonder if the results would really be trustworthy.Any thoughts?PSI plan to buy a B&K PR-28A (looks identical to the Fluke 80K-40) high voltage adapter so that I can measure the output voltage of the UNI-T, to check that the unit is outputting something near specifications.
Intel 10 gigabit copper ethernet lab - Page 1
Forum section: electronics / general

author: Wartex
author_rank: Frequent Contributor
timestamp: July 07, 2012, 05:07:33 pm
content: http://www.tomshardware.com/picturestory/562-intel-x-lab-10gbe.html

author: McMonster
author_rank: Frequent Contributor
timestamp: July 07, 2012, 08:11:09 pm
content: I want to work there.

author: hans
author_rank: Super Contributor
timestamp: July 07, 2012, 10:03:24 pm
content: Awesome insight. I would think that a company would automate all their testing procedures, even the plugging in and out of ethernet cables for a unit test of different cables. Geekheaven.The gear they have is amazing, but those guys make a lot of money, so investing it in new technologies and products is a must to keep up.I wonder how many people are actually involved in the Intel 10gbit technologies. Clearly these people do much of the testing and signal analysis stuff, including tweaks. How many people 'back at the office' would be designing boards and firmware (with the big amount of DSP involved).. hmm, I wonder.When I got a grey board I will apply there.
Electronics shops in Washington DC - Page 1
Forum section: electronics / general

author: fmaimon
author_rank: Unknown
timestamp: July 07, 2012, 12:15:49 am
content: I'm visiting Washington DC next month so, as the USA is the place to go to buy new toys, I was wandering if there is any electronic's shop in Washington DC worth visiting. Is there any that sells Agilent Oscilloscopes?One thing I'll do is buy lots of stuff from digikey but, unfortunately, they don't sell Agilent Oscilloscopes.Felipe

author: saturation
author_rank: Super Contributor
timestamp: July 07, 2012, 12:50:38 pm
content: Nothing notable as Washington is not a hotbed of electronics manufacturing. One option if you're visiting the states, buy from the lowest cost dealer you can find and have them ship it to your USA address. The places worth visiting mostly for great salvage are near electronics havens, like Florida because of NASA, or California because of Silicon Valley.

author: N2IXK
author_rank: Frequent Contributor
timestamp: July 07, 2012, 06:57:26 pm
content: Not much in the way of surplus shops in DC that I am aware of, but the National Electronics Museum is about an hour outside DC. Well worth a look is you are in the area.[http://www.nationalelectronicsmuseum.org/index.shtml
LevLight - Magnetic Levitation and Wireless Power Transfer by Chris Rieger  - Page 1
Forum section: electronics / general

author: Mint.
author_rank: Frequent Contributor
timestamp: July 07, 2012, 03:25:54 am
content: Hayo!Please see the link below for an interesting project from an EE student here in Australia.http://chrisrieger.com/LevLight.aspxI hope that somebody will find this interesting and this will promote discussion. I've seen people levitating objects using magnetism, and heard about wireless power transfer, but the two together is a completely different thing.Good on him!
Need to source similar enclosure - Page 1
Forum section: electronics / general

author: Alan
author_rank: Newbie
timestamp: July 07, 2012, 10:29:05 pm
content: Hi all,I am looking to find an enclosure for my product. Teko very kindly provided me with a sample of the MC11.9 (http://www.teko.co.uk/en/prodotti/famiglia/FP/serie/40). This case is perfect for my needs. However with only needing batches of 25 or 50 the price quoted was very steep at ~£6 per enclosure. I am aware that this design of case is copied by many and was wondering if anyone knew other places where I can source this enclosure or a similar one.Regards.

author: free_electron
author_rank: Super Contributor
timestamp: July 08, 2012, 12:36:07 am
content: tryBUD engineeringorHAMMOND manufacturing.that is indeed a run -of-the-mill ugly enclosure.
learning by your mistakes is really the best way - Page 1
Forum section: electronics / general

author: shane_95
author_rank: Regular Contributor
timestamp: July 05, 2012, 12:59:50 pm
content: I was using my soldering iron today, and I noticed that the nut to keep the tip tight was getting loose, so i grabbed my pliers to tighten it. Not thinking I touched the metal part if the pliers so i could get a better grip. It hurt. I no know not to so that again

author: Psi
author_rank: Super Contributor
timestamp: July 05, 2012, 01:04:20 pm
content: hehe, done that before.I've also dropped the metal cover part on my lap.

author: shane_95
author_rank: Regular Contributor
timestamp: July 05, 2012, 01:11:42 pm
content: I hate it when you burn the tips of fingers, it makes it so hard to pick things up some times

author: madires
author_rank: Super Contributor
timestamp: July 05, 2012, 01:37:26 pm
content: Hi!And screws for fastening tips are bad also. While iron and tip expand outwards with the heat, a screw will expand both ways and put more stress to iron and tip. That also causes less contact area between iron and tip. Tips with clamps are much better, IMHO.Cheersmadires

author: Short Circuit
author_rank: Frequent Contributor
timestamp: July 05, 2012, 03:19:26 pm
content: That doesn't qualify as a mistake.That's just plain stupid

author: caroper
author_rank: Regular Contributor
timestamp: July 05, 2012, 05:49:36 pm
content: Quote from: shane_95 on July 05, 2012, 12:59:50 pmEspecially when it is the finger you type with

author: Simon
author_rank: Unknown
timestamp: July 05, 2012, 06:38:06 pm
content: That's all part of growing up. Applies in all aspects of life and calls for a general awareness of yourself and the environment your in.

author: mianchen
author_rank: Regular Contributor
timestamp: July 06, 2012, 07:29:43 am
content: When I was playing with soldering iron at the age of 13, my next door neighbour's 5 year old kid wanted to have a go as well and picked it up when I left it on the table to get a drink...he grabbed the metal parts not the handle...ouch...he must have learnt

author: G7PSK
author_rank: Super Contributor
timestamp: July 06, 2012, 07:36:19 am
content: Remember though some mistakes you only make once other mistakes you never get a chance to make again. My grandfather who was Greek had a saying, " there is no such thing as an accident only such thing as a fool".

author: Simon
author_rank: Unknown
timestamp: July 06, 2012, 08:19:45 am
content: Quote from: mianchen on July 06, 2012, 07:29:43 amOuch, hope you learnt too. You can't leave a five year old near a soldering iron unattended
First beer licensed under CERN OHL v1.1 :) - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: July 07, 2012, 12:15:31 am
content: Free as in beerhttp://2012.rmll.info/biere-libreFrom the OHWR,org mailing listonly in French at the moment

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: July 07, 2012, 03:47:00 am
content: This is some good news.And in English:http://translate.google.com/translate?sl=fr&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2F2012.rmll.info%2Fbiere-libre
Faraday cage made with wallpaper - Page 1
Forum section: electronics / general

author: JonnyBoats
author_rank: Regular Contributor
timestamp: May 10, 2012, 01:49:37 pm
content: A French firm has a new product, wallpaper with embedded Wi-Fi blocking.http://www.linformaticien.com/actualites/id/24723/un-papier-peint-pour-proteger-son-wi-fi.aspxUnfortunately I don't speak French; perhaps someone else could summarize the article for us?

author: PeterG
author_rank: Frequent Contributor
timestamp: May 10, 2012, 02:05:50 pm
content: Google translated it with no problems at all.Google Chrome browser with Google Translate extension. Great combo.Regards

author: anotherlin
author_rank: Frequent Contributor
timestamp: July 04, 2012, 09:01:09 pm
content: Quote from: JonnyBoats on May 10, 2012, 01:49:37 pmYou pretty much summed it up: "A French firm has a new product, wallpaper with embedded Wi-Fi blocking".Not much more to say, except that it can also block cell phones.Yet 3rd paragraph is not really clear : It is mentionned that you can block up to three frequencies. My guess is that you can buy a specific wallpaper designed to block certain frequencies (mobile phone, wifi), but you cannot "retarget it" on the fly.Regarding price, it should cost much more than middle-range wallpaper.The article doesn't go into technical specification. It would be great to have a link to the actual press release from the designer (a french engineering school).

author: bilko
author_rank: Frequent Contributor
timestamp: July 04, 2012, 10:24:21 pm
content: OK if you want to stop wifi getting into your room, don't suppose its such a good idea if you want to prevent wifi getting out. The effect will be like sitting in a low power microwave oven

author: free_electron
author_rank: Super Contributor
timestamp: July 04, 2012, 10:43:06 pm
content: what a useless idea ...The first window or door that comes along punches a massive hole in the shield ... back to the drawing board boys ... this is a screen door on a submarine...

author: tom66
author_rank: Super Contributor
timestamp: July 04, 2012, 11:30:29 pm
content: Not only that, in many places it is illegal to block cellphone communications. It may be allowable in private homes but it would limit its use in businesses etc.
Great web site to get electronics and more for us Aussies  - Page 1
Forum section: electronics / general

author: shane_95
author_rank: Regular Contributor
timestamp: July 04, 2012, 02:30:09 pm
content: I was on the looking up the price of 10 tune pots, because I heard that where quite pricey and I was curious and, I came across this webs site for all things electrical and more, for us Aussieshttp://www.wiltronics.com.au. I did a quick test to see how much something would cost + shipping (didn't complete the payment though), for 100 3mm red LEDs it would cost $10 + $7.50 shipping. I thought this was quite good, because I spent $2.50 on 10 5mm leds at jaycar. If you are buying in bulk I don't think you would worry about $7.50 shipping

author: T4P
author_rank: Super Contributor
timestamp: July 04, 2012, 04:02:55 pm
content: 2.50 on 10 leds ... mate you overspentbuy from taydaelectronics

author: shane_95
author_rank: Regular Contributor
timestamp: July 04, 2012, 05:42:17 pm
content: Ok screw what I said use DaveXRT's link, 300 LEDs for 6 bucks with $1.50 shipping!!!
combined results give a local significance of 5 sigma at 126.5 GeV - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: July 04, 2012, 08:53:03 am
content: combined results give a local significance of 5 sigma at 126.5 GeVhello mr higgs

author: Unknown
author_rank: Unknown
timestamp: July 04, 2012, 11:27:25 am
content: Contrary to my expectations (and Frankie Boyle's) our realty didn't dissolve and there was no huge sign saying****************LEVEL 2****************Which is a shame.But what now...once they have found it? Thoughts?

author: Rerouter
author_rank: Super Contributor
timestamp: July 04, 2012, 12:33:54 pm
content: gravity guns?more seriously it will probably be the construction of a larger partical accelerator to find more exotic particles at even higher energy levels, i doubt the higgs will be the last we find,

author: G7PSK
author_rank: Super Contributor
timestamp: July 04, 2012, 12:47:52 pm
content: They have got to find the Majorana particle yet.

author: Sionyn
author_rank: Frequent Contributor
timestamp: July 04, 2012, 01:02:52 pm
content: gravity guns.....Gordon freeman style yes pleasehttp://havewefoundthehiggsbosonyet.org/

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: July 04, 2012, 03:27:51 pm
content: My understanding is that official CERN results won't be announced until the end of this year, unless I'm mistaken.So keep the champagne on ice.

author: 8086
author_rank: Super Contributor
timestamp: July 04, 2012, 04:30:53 pm
content: http://www.ebuyer.com/390394-higgs-boson-higgs126
So what exactly do you need 6 fingers for again? - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: July 04, 2012, 10:39:15 am
content: Banjo playing.

author: Unknown
author_rank: Unknown
timestamp: July 04, 2012, 10:49:08 am
content: Live longer and prosper even more

author: vk6zgo
author_rank: Super Contributor
timestamp: July 04, 2012, 02:15:15 pm
content: Using a duodecimal system.Oh,wait,that needs 6 on each hand!Cartoon characters use Octal!

author: G7PSK
author_rank: Super Contributor
timestamp: July 04, 2012, 02:59:45 pm
content: So you can show a few more V's to the likes of Cisco.

author: Mechatrommer
author_rank: Super Contributor
timestamp: July 04, 2012, 04:03:43 pm
content: to prove imperial is right!joking guys! i got 4 summons so i need to cheer a bit.
Renesas DevCon 2012 - Page 1
Forum section: electronics / general

author: Pat Pending
author_rank: Regular Contributor
timestamp: July 03, 2012, 10:44:04 pm
content: We last heard from Dave at DevCon in 2010 and now Renesas is at it again.http://www.renesasdevcon.com/index.htmlThe course sessions for 2010 are in the archive.From similar events I've attended, the presenters typically rehash the same course material from year to year.You might find what you want in the archives and blow that early bird registration fee on some new gear.

author: EEVblog
author_rank: Unknown
timestamp: July 04, 2012, 01:41:03 am
content: There was some talk early on to get me back for 2012, but have not heard anything since.It was a great event, recommended if you can get your company to pony up for itAnd the Hyatt is a great venue.I wonder if the after party will be as epic this time around, given Renesas's current financial issues...Dave.

author: T4P
author_rank: Super Contributor
timestamp: July 04, 2012, 04:47:13 am
content: Quote from: EEVblog on July 04, 2012, 01:41:03 amThere's not much they can do anyway ... With ST & ARM leading the ARM forefrontIt's interesting to note that Renesas did buy some licenses from ARM

author: Pat Pending
author_rank: Regular Contributor
timestamp: July 04, 2012, 06:49:42 am
content: That's just it. Renesas should have offered ARM cores long ago, but Japanese companies like toroll their own difficult to program processors.Factor in Renesas's looming financial predicament and their ability to deliver abstraction libraries forcomplicated peripherals and FAE support is called into question.Alas Dave, Dean Kamen has this years DevCon podium - darn it!.

author: T4P
author_rank: Super Contributor
timestamp: July 04, 2012, 04:00:47 pm
content: Quote from: Pat Pending on July 04, 2012, 06:49:42 amJapanese-style, they like to do their own things
Fluke Holster C81Y (Flex Stand) vs H80M (solid yellow tilt stand) - Page 1
Forum section: electronics / general

author: retiredcaps
author_rank: Super Contributor
timestamp: July 04, 2012, 05:59:19 am
content: I have the older discontinued C81Y (Flex Stand) and the newer H80M that comes with the series V multimeters.I can only keep one because I'm selling a series 80 multimeter.I'm curious to which one would you keep and why? I know from Dave's videos that he prefers the C81Y Flex Stand.If you don't know what I'm talking about, see below for sample pictureshttp://www.fluke.com/fluke/usen/Accessories/Cases-Holsters/C81Y.htm?PID=55846vshttp://www.fluke.com/Fluke/usen/Accessories/Cases-Holsters/H80M.htm?PID=56254

author: T4P
author_rank: Super Contributor
timestamp: July 04, 2012, 03:59:01 pm
content: I preferred the H80Mthe C81Y was a POS for me because the meter kept sliding towards the table ...
Lead forming tool design for 3D printer - Page 1
Forum section: electronics / general

author: ChrisKiwi
author_rank: Contributor
timestamp: July 04, 2012, 12:49:51 pm
content: Just found this on thingiversehttp://www.thingiverse.com/thing:26025thought it might be useful.

author: notsob
author_rank: Frequent Contributor
timestamp: July 04, 2012, 01:22:38 pm
content: you can get them at your local component supply storejaycar TH-1810 for example

author: ampdoctor
author_rank: Frequent Contributor
timestamp: July 04, 2012, 11:43:31 pm
content: I hate those things. The bends always look like crap when you're done. Unless you're populating a board with something on the order of 50-100 axial components, you'll get much better results both visually and mechanically by slowing down and using a pair of needle nose pliers.

author: ChrisKiwi
author_rank: Contributor
timestamp: July 05, 2012, 02:04:44 am
content: Quote from: ampdoctor on July 04, 2012, 11:43:31 pmI've never had a problem, perhaps your just blaming the tools because you can't get it to work properly?

author: ChrisKiwi
author_rank: Contributor
timestamp: July 05, 2012, 02:10:27 am
content: Quote from: notsob on July 04, 2012, 01:22:38 pmYes, $9.90 if you live in NZ. I'm assuming you followed the link. If you had a 3D printer why spend $9.90 buying one when you could print a custom one, or several and give them away to your friends

author: ampdoctor
author_rank: Frequent Contributor
timestamp: July 05, 2012, 05:03:56 am
content: Quote from: ChrisKiwi on July 05, 2012, 02:04:44 amNo problem using the tool. It's just that the lead bender tends to make the bend rather rounded whereas if you make the bend with a pair of pliers you'll get a sharp bend with a very tight radius that looks crisp and professional. Another issue I've had with them is that they don't always bend the leads at exactly the right place relative to the through hole location. Then you're left with leads that are either angled in or out slightly. When this happens you can either say screw it and just leave them that way or you're back to pliers and adjusting the bend location anyway.With the pliers method, you just center the component between the pads, grab the leads at the through hole's centerline and bend. The leads are now going straight down thru the center of the pads resulting in a beautiful solder joint. It takes a few more seconds this way but the results are significantly better.

author: LEECH666
author_rank: Frequent Contributor
timestamp: July 05, 2012, 05:54:51 pm
content: I do it the same way as ampdoctor. I own one of those lead forming tools tho. I hardly ever use it.Cheers,Florian

author: G7PSK
author_rank: Super Contributor
timestamp: July 06, 2012, 02:13:16 pm
content: I often use a surgical staple remover to make bends in leads, they produce a nice omega shape in the lead for vibration absorbing and heat expansion purposes.
Dynamic input range of single-ended vs fully differential ADCs - Page 1
Forum section: electronics / general

author: onemilimeter
author_rank: Frequent Contributor
timestamp: July 03, 2012, 10:52:35 pm
content: ADC1: 16-bit, single-ended input, accept true bipolar +/-4.096VADC2: 16-bit, fully differential input, accept ±2.048V pseudo-differential bipolarhttp://www.linear.com/product/LTC2389-16Is the dynamic input range of both ADC1 and ADC2 the same?Thanks.
Feel stupid. Blew up two STM32 discovery boards today. :/ - Page 1
Forum section: electronics / general

author: tom66
author_rank: Super Contributor
timestamp: July 03, 2012, 11:26:14 am
content: For a battery load tester. It worked fine but I needed to check how it would load with various voltages, so I used a bench PSU. Then the board just died, shorted. Couldn't figure out why. So I replaced it, and 5 minutes later that one died too, with a 1 ohm short across 3V and ground. Then I saw what it was. PSU spiked to 6V due to loose SENSE- wire on output, frying the ADC input and probably blowing some stuff inside the chip.Both boards have STM32s which get excessively hot when powered up.Lesson learned - use a limiting resistor and/or zener on the ADC input!!!

author: T4P
author_rank: Super Contributor
timestamp: July 03, 2012, 11:29:22 am
content: which board is it? The STM32F4 disco board i have gets only slightly warm

author: Rerouter
author_rank: Super Contributor
timestamp: July 03, 2012, 11:30:53 am
content: the golden question is why your supply doesnt ignore by defualt having 0V on the sense line, unless its all analog in which case its more understandable, still should have something to detect 0,

author: tom66
author_rank: Super Contributor
timestamp: July 03, 2012, 05:27:25 pm
content: ^It's an old TTI quad-mode triple output power supply, pretty ancient.Both STM32 chips are fried. I can get the board to boot if 2.5A (@3V) flows through it, but the main STM32 is dead. Only the programmer LED lights up.
Why may a poor reverse recovery diode cause "shoot-through" in a inverter? - Page 1
Forum section: electronics / general

author: onemilimeter
author_rank: Frequent Contributor
timestamp: July 03, 2012, 11:33:34 am
content: Let's refer to a 3-phase inverter, which made up of six power MOSFETs. Each MOSFET has an intrinsic body diode with rather poor reverse recovery characteristics. Learned from several online articles that the poor reverse recovery diode may cause a "short-circuit" or "shoot-through" of one inverter leg. For example, if the upper MOSFET is turned on when the body diode of opposing MOSFET in the same inverter leg is conducting, then an "effective short circuit" may occur. However, I do not understand how a poor reverse recovery diode may cause "short-circuit" in one inverter leg. Kindly comment. Thanks.

author: Rerouter
author_rank: Super Contributor
timestamp: July 03, 2012, 11:39:49 am
content: a diode is a short with a voltage drop while conducting forward, and if it is very slow to recover, it can even pass current of the opposite polarity through it before it recovers,the voltage drop of such varies, and with a mosfet body diode i dont have the faintest on what it might be, just be aware while its recovering, its effectivly a bipolar voltage drop,

author: jahonen
author_rank: Super Contributor
timestamp: July 03, 2012, 11:42:47 am
content: If one of the body diodes is conducting (with neither mosfet turned on) due to external inductive load and the opposite side mosfet turns on in the same inverter leg, this produces a short (or huge spike of current) via body diode until diode recovers. These current spikes cause all kinds of problems, like EMI. Obviously, it is not a problem if load would be completely resistive (as there would be no current through the body diodes then).Regards,Janne

author: onemilimeter
author_rank: Frequent Contributor
timestamp: July 03, 2012, 12:28:29 pm
content: Quote from: jahonen on July 03, 2012, 11:42:47 amThanks. Please refer to the 3-phase inverter shown on the attached image. Let's the Vdc is 35V, the Rd_on of the MOSFET is 0.3ohm, and the forward voltage of the MOSFET body diode is 0.7V. If the upper MOSFET (Q1) is turned on while the lower MOSFET body diode is conducting as described in jahonen's last post, the current though Q1 will be (35-0.7)/0.3 = 114A. Does it mean this large current of 114A will flow through the Q2 body diode too?

author: onemilimeter
author_rank: Frequent Contributor
timestamp: July 03, 2012, 12:34:09 pm
content: Quote from: Rerouter on July 03, 2012, 11:39:49 amThanks. What will limit the opposite polarity current that passes through the diode? Will it exceed peak reverse recovery current stated in its datasheet?

author: jahonen
author_rank: Super Contributor
timestamp: July 03, 2012, 12:35:15 pm
content: Quote from: onemilimeter on July 03, 2012, 12:28:29 pmYes, basically that is correct. Also, since power supply rails have some inductance, large di/dt of the current spike tends to generate huge voltage spikes on the rails, even killing bridge transistors if inductance and/or di/dt is high enough.Regards,Janne
Possible to compensate the phase error introduced by a LPF? - Page 1
Forum section: electronics / general

author: onemilimeter
author_rank: Frequent Contributor
timestamp: July 03, 2012, 12:49:05 pm
content: If a signal frequency is close to the cut-off frequency of a low-pass filter (LPF), the filtered output signal will have a phase error due to the LPF. Is it possible to apply a "real-time" compensation of the phase error introduced by a LPF? Cheers.

author: amspire
author_rank: Super Contributor
timestamp: July 03, 2012, 01:29:45 pm
content: Quote from: onemilimeter on July 03, 2012, 12:49:05 pmIt is much easier designing a low phase error low pass filter, rather then correcting a filter with a poor phase response. In general, if you want a very sharp cut-off, the phase response will be pretty bad at the high end of the passband. If you want a very constant group delay, then you need a high order filter (lots of stages) to get anything better then a gentle cut-off.Take a look at Bessel filters that have a constant group delay to well into the stop band.It comes down to the specifications that you need for the filter.Richard.

author: vk6zgo
author_rank: Super Contributor
timestamp: July 03, 2012, 04:03:35 pm
content: Although it is obviously easier (better?) to design a LPF with a low phase error,occasionally circumstances restrain you from doing so.In that case, real-time correction of such errors is done,often with active circuitry.An example is Group Delay correction in analog Television Transmitters.In this case,however, as well as the sharp roll off of the Upper sideband, the GD corrector must correct for the presence of the Vestigial Lower Sideband,& the filtering applied in the VSB receiver which is designed to prevent excessive signal level at low video frequencies.These characteristics of an analog VSB TV signal cause GD errors at both high & low frequencies, w.r.t. mid frequencies.
uCurrent for measuring micro volts - Page 1
Forum section: electronics / general

author: desirider
author_rank: Newbie
timestamp: June 22, 2012, 10:24:20 pm
content: Hi folks,My first post to the forum, so go easyI am thinking of using the uCurrent adapter to measure very small voltages. It has a nice stable gain of 100, so if we remove the 10K shunt and drive the op-amp directly by the voltage to be measured, we would get an accurate voltage scaling right?I am not sure what noise implications are, but the input impedance should be fairly high. Any comments/suggestions?Thanks,Desirider.

author: EEVblog
author_rank: Unknown
timestamp: June 22, 2012, 10:49:46 pm
content: Yes, that would be possible.Dave.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 22, 2012, 11:00:33 pm
content: You need to be quite careful to avoid thermocouple effects when probing microvolt signals - even having probes at slightly different temperatures can introduce errors.

author: desirider
author_rank: Newbie
timestamp: July 02, 2012, 09:56:33 pm
content: Thanks for the feedback guys!I found some additional info on compensating for thermal voltages:http://www.ni.com/white-paper/3296/en#toc7National Instruments also has some tutorials for low-level measurements:http://zone.ni.com/devzone/cda/epd/p/id/5357

author: DaveW
author_rank: Frequent Contributor
timestamp: July 03, 2012, 10:26:31 am
content: The bible for this sort of thing is the Keithley handbook, have a look at section 3.2 for low voltage measurements,http://www.keithley.com/knowledgecenter/knowledgecenter_pdf/LowLevMsHandbk_1.pdf
How save money on LR44.. - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: July 05, 2012, 04:00:35 pm
content: Use a lot of LR44?http://www.humour.com/videos/faites-des-economies.htm

author: rr100
author_rank: Frequent Contributor
timestamp: July 05, 2012, 04:31:08 pm
content: You're saving only if you compare with the $4.99 LR44 supermarket rip-off.
Ultra Fast Nickel Iron Battery - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: July 02, 2012, 04:50:58 am
content: Greetings EEVBees:--See below link for Stanford University News article about using Graphene to revive Edison's old Nickel Iron Battery:http://news.stanford.edu/news/2012/june/ultrafast-edison-battery-062612.html--I am not an Engineer, and I have almost no technical knowledge of batteries, so any informed coments would be welcome.There is a great satisfaction in building good tools for other people to use.Freeman Dyson 1923 -Best RegardsClear Ether

author: PeterG
author_rank: Frequent Contributor
timestamp: July 02, 2012, 06:13:58 am
content: Seems to me they perform similar to modern Super/Ultra Capacitors.Regards

author: tom66
author_rank: Super Contributor
timestamp: July 02, 2012, 09:18:44 am
content: Hmm.Saying it charges in 2 minutes and discharges in 30 seconds means very little, though it is impressive. But - will it be practical? Durability/cycle lifetime? Density? Cost?

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: July 02, 2012, 02:33:38 pm
content: Re. durability:Quote

author: TerminalJack505
author_rank: Super Contributor
timestamp: July 02, 2012, 09:31:11 pm
content: Another rechargeable battery technology that Edison invented has recently made a comeback: the nickel-zinc battery. NiZn batteries have an energy density similar to NiMH batteries but have a higher nominal voltage: 1.65V vs. 1.2V.In the US a company called PowerGenix sells NiZn batteries. I bought one of their chargers with 4 AA batteries at a 'liquidation' store. The charger needed some minor tweaking for it to work properly but so far the batteries seem to work pretty good.The packaging was a bit misleading. They used the term mWh rather than mAh like other battery manufacturers.
What type of ceramic 10 amp fuse does the AMPROBE AM220 require? - Page 1
Forum section: electronics / general

author: ItchyTasty42
author_rank: Newbie
timestamp: July 02, 2012, 02:55:20 pm
content: My stupid idiotic 'friend' borrowed my multimeter and used it on the wrong setting, especially stupid as he's got a Fluke multimeter and should know better. His excuse is he wasn't familar with my multimeter and didn't pay me a penny towards any replacement fuses.And luckily the only thing that happened was it blew a fuse inside.Luckily the PCB says what rating of fuses it takes, both a 10A/250V and and 0.5A/250V.However I looked it up and found this:http://www.testequipmentdepot.com/amprobe/multimeters/am220_am240.htmThe 0.5A/250V fuse says it has to be a fast blow fuse, but says nothing about the 10 amp fuse which has blown. I presume it's a slow blow fuse? Or could even be an anti-surge fuse? I'm clueless, especially as in the UK there's nowhere that sells exact replacement fuses for that multimeter.All I can find are these:http://www.amazon.co.uk/Quick-Blow-Ceramic-Fuse-6-3mm/dp/B003O8VJMI/ref=sr_1_fkmr1_3?s=electronics&ie=UTF8&qid=1341238402&sr=1-3-fkmr1orhttp://www.amazon.co.uk/Microwave-Fuse-32mm-Time-Delay/dp/B003O8R1DY/ref=?ie=UTF8&m=A1HYUQEVEP9KPZAlso even more annoying that the fuses are not marked with their ratings,I only can barely see something under a strong magnifying glass on the metal end cap. Which they would print the amp rating on the ceramic fuse body,like normal domestic plug fuses do.The 0.5A 250V ceramic fast blow fuse can luckily be got here:http://www.amazon.co.uk/Siba-Fuse-Ultra-Rapid-0-5a/dp/B0058JPOKO/ref=sr_1_37?s=electronics&ie=UTF8&qid=1341240678&sr=1-37

author: nanofrog
author_rank: Super Contributor
timestamp: July 02, 2012, 03:56:06 pm
content: Littelfuse 326010 (10A/250V, 6x32 mm, slo-blow). There's a US seller that has these listed on eBay.co.uk. Listing is a 4pk, @ ~5GBP, incl. shipping.

author: ItchyTasty42
author_rank: Newbie
timestamp: July 02, 2012, 04:36:58 pm
content: Cheers

author: T4P
author_rank: Super Contributor
timestamp: July 02, 2012, 06:22:56 pm
content: 6x32mm HRC fuses ( the small ones )You can go to farnell for a reputable source
Which manufacturer's logo is this? - Page 1
Forum section: electronics / general

author: DrSegatron
author_rank: Contributor
timestamp: July 01, 2012, 11:24:50 pm
content: I can't find this logo anywhere, is it a company logo?It is from an LCD display module.

author: free_electron
author_rank: Super Contributor
timestamp: July 02, 2012, 04:44:53 am
content: varitronix

author: DrSegatron
author_rank: Contributor
timestamp: July 02, 2012, 04:59:46 am
content: Thanks. I don't get any hits on the model number though.

author: free_electron
author_rank: Super Contributor
timestamp: July 02, 2012, 05:10:09 am
content: this is very old. varitronix changed thair logo in 2003 ... looks like a 2 line by 22 char custom job.

author: DrSegatron
author_rank: Contributor
timestamp: July 02, 2012, 05:30:32 am
content: That would explain why don't get any hits.I removed the protective plastic, and it actually seems to be a 2x16 char. It has a Samsung KS0066 chip, so I guess I could try to figure out the pinout of the module.

author: amyk
author_rank: Super Contributor
timestamp: July 02, 2012, 09:35:35 am
content: Quote from: free_electron on July 02, 2012, 05:10:09 amMy first guess was Varitronix too but then I looked and have only found the old logo being the "VL" one. An archive of their website from '98 also shows that. They were around since '78 so maybe this one is even older, but it looks more like "VC" or "CV" to me.Is the model number cyrillic? 2022STLDY?BN?

author: DrSegatron
author_rank: Contributor
timestamp: July 03, 2012, 08:15:42 am
content: Quote from: amyk on July 02, 2012, 09:35:35 amSeems like 2022STLDY?BN, possibly a Russian OEM part. Thought it was a misprint first.
WOW Thanks dave!!! - Page 1
Forum section: electronics / general

author: shane_95
author_rank: Regular Contributor
timestamp: July 02, 2012, 01:49:54 pm
content: I was going though my sub box on youtube, waiting for an EEVblog to pop up. I click on the video to watch it, then to my amazement I here "shane_95 asked"My reaction - OMG now way!!!! get out, that was me OMG *jaw hitting the floor*Now just to go through with the ideas I have and plan, design, and buildTHANK YOU DAVE!!!!
Thermal Infra red Camera Sensors and FLIR - Page 1
Forum section: electronics / general

author: johnnyfp
author_rank: Frequent Contributor
timestamp: June 28, 2012, 09:59:28 pm
content: Why are Flir camera's soo expensive, and that's for a 60x60 pixel camera. Look at a supposedly high res camera at 320x240, you can buy a high spec'd car for the same price.It can't be the technology, it must be just because they can charge so much.

author: Sionyn
author_rank: Frequent Contributor
timestamp: June 28, 2012, 10:17:27 pm
content: id ask mike likely optics ?he did a awesome teardown loving mikes teardowns really interesting just waiting on dave photocopier now asanyway check mikes video here

author: johnnyfp
author_rank: Frequent Contributor
timestamp: June 28, 2012, 10:23:36 pm
content: Yeah I saw that. Interesting tear down.Looking around I've seen many Vid's of people using a Single cell or PIR equivalent and a scanning motion to build up a 2d image, which seems one way to do it, but that would require servos and such. So I was thinking, what about using something like a DLP chip to individually reflect onto a Single Cell thermal censor to then build up an image.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: June 29, 2012, 01:22:28 am
content: Optics is really not a very expensive part of IR tech, at least not to the point where it bumps the asking price to $6 k for each unit. It's mostly to do with the sensor array, which generally consist of ferroelectric or pyroelectric materials. The phase transition properties of such materials must be sensitive enough at room temperature, must be fast enough for real time read-outs, and each pixel must be uniform in sensitivity. Additionally, the sensor array needs to be housed in a Dewar flask like environment to keep the sensor substrate temperature as stable as possible. I'd imagine all of that would be very a big engineering challenge for uncooled cameras.

author: codeboy2k
author_rank: Super Contributor
timestamp: June 30, 2012, 05:43:17 am
content: Quote from: johnnyfp on June 28, 2012, 10:23:36 pmDLP technology might work. Unfortunately, the window on the DMD (Digital Micromirror Device) chip is optimized for visible and UV light, where the transmission at those wavelengths is nearly 100%. At IR wavelengths , transmission of the window drops down to about 70%. And the datasheets say nothing about the mirrors themselves, which might not reflect IR.And you would need optics. The DMD is planar and has no focal point of it's own. You would have to have a parabolic reflector with the detector at the focal point or a converging lens. I'd start with a parabolic reflector from a hacked flashlighttransmissive characteristics:http://www.ti.com/lit/an/dlpa031/dlpa031.pdfdatasheet:http://www.ti.com/lit/ds/symlink/dlp5500.pdf

author: SeanB
author_rank: Super Contributor
timestamp: June 30, 2012, 06:11:26 am
content: The mirrors are aluminium, so will reflect IR. The glass is probably almost totally opaque to IR, as this is part of the lamp filtering to keep the mirrors cool, you would probably have to break it off the chip to use it.