hybridfree/eevblog-posts huggingface dataset:
Warning: phishers targeting digi-key users - Page 1
Forum section: electronics / general

author: ToBeFrank
author_rank: Regular Contributor
timestamp: April 18, 2012, 04:05:25 pm
content: I was surprised to see a phishing email for digi-key in my spam folder. It has a link that purports to take you towww.digikey.com/catalog, but it pointing at a page on lst12.com. It seems the phishers are branching out from banking web sites.

author: ToBeFrank
author_rank: Regular Contributor
timestamp: April 19, 2012, 03:25:50 am
content: My apologies. I have been informed this is a legit email. Gmail flagged it as phishing, and it sure looked like a phishing email, but apparently it is not.

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 19, 2012, 06:38:01 am
content: just wondering .do you have an email program or are you using the web browser ?

author: ToBeFrank
author_rank: Regular Contributor
timestamp: April 19, 2012, 02:43:53 pm
content: I use gmail in the browser at work. And gmail in Mac's Mail.app at home.

author: Digi-Key Corporation
author_rank: Newbie
timestamp: April 23, 2012, 08:04:36 pm
content: Hello,Our apologies for the confusion. The email regarding our new Dynamic Catalog is in fact an email from Digi-Key. The link in the email will take you to the Dynamic Catalog on digikey.com.If you have any further questions please let us know!Digi-Key Corporation
Typical MBA/Marketing crap - Page 1
Forum section: electronics / general

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 23, 2012, 07:27:37 am
content: The ad reads, "the online MBA you probably can't get into"I couldn't believe just how high this particular ad raised its balls...it's actually laughable.It truly is a sad state of affairs to know that these worthless MBA types are being churned out like clockwork, and that reputable academic establishments are willingly setting aside principle to buy into this crock of garbage.
My cousin Terry, he is running the London marathon - Page 1
Forum section: electronics / general

author: dimlow
author_rank: Frequent Contributor
timestamp: April 22, 2012, 08:14:32 am
content: Hi Guys, not really the place to post this but every little helps and i hope Dave dont mind,Just got a message from my cousin Terry he is running the London marathon to generate donations for Seafarers UK, formerly King George’s Fund for Sailors the leading charity for our maritime community, looking after people across the UK from the Royal Navy and the Royal Marines, the Merchant Navy and the fishing fleets, together with their families.Every year over 100 fishermen are killed or seriously injured and at least two fishing boats are lost at sea every month. These terrible accidents often lead to real hardship. Often, it is the breadwinner who is killed or badly injured leaving the family in desperate need of financial and emotional help. Funding grants to help these distressed families is just one of the many things Seafarers UK do to help Britain's maritime communities.Seafarers UK also give grants to organisations that provide the following services: support for veterans from the Royal Navy and Merchant Navy; specialist sea training to provide more opportunities for young people; hostels and specialist services that provide practical help for unemployed and homeless seafarers; care for the children of seafarers who have fallen on hard times.Please support him. if you want to donate visit herehttp://uk.virginmoneygiving.com/fundraiser-web/fundraiser/showFundraiserProfilePage.action?userUrl=terryledwithThanks in advance.
Interesting Capacitor info resource - Page 1
Forum section: electronics / general

author: robrenz
author_rank: Super Contributor
timestamp: April 21, 2012, 12:23:31 pm
content: Group of papers and app notes from Illinois Capacitorhttp://www.illinoiscapacitor.com/tech-center/papers.aspxTech centerhttp://www.illinoiscapacitor.com/tech-center.aspx

author: JorgeCarbajal
author_rank: Contributor
timestamp: April 21, 2012, 05:25:40 pm
content: Thanks for sharing thats a lot of info !!

author: ee851
author_rank: Regular Contributor
timestamp: April 21, 2012, 08:34:24 pm
content: That helped, robrenz. Thank you.I looked at the paper on storing capacitors. I did not know electrolytic capacitors contain rubber. That is a revelation to me. Accordingly, they ought be stored as rubber bands ought be stored -- out of sunlight, in a cool, humid environment above freezing.

author: T4P
author_rank: Super Contributor
timestamp: April 22, 2012, 02:34:41 am
content: Quote from: ee851 on April 21, 2012, 08:34:24 pm... you can see them when you are looking head on at the leads poking out ...
Ebay Bargain? - Page 1
Forum section: electronics / general

author: FreeThinker
author_rank: Frequent Contributor
timestamp: April 18, 2012, 05:03:30 pm
content: Dave Tweeted this link earlier, it didn't sell (no bids) Your chance to grab a piece of computer history has been relistedhttp://www.ebay.co.uk/itm/160781780426?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649very reasonable P&P too

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: April 18, 2012, 05:58:53 pm
content: Well if there is some machead out there giving the asking for that..??Its a MAC .. if i shooult have a MAC it would be a MC Donals Burger / MCdonnell douglas plane..MAC free zone in my home

author: SeanB
author_rank: Super Contributor
timestamp: April 18, 2012, 06:01:42 pm
content: Don't need a original MAC, I have one downstairs in the basement. Complete with external 2 speed disk drive, and the disks. The Applewriter dot matrix printer is there also.

author: Mint.
author_rank: Frequent Contributor
timestamp: April 18, 2012, 08:40:02 pm
content: Uhhh... I already posted a topic about this before.

author: FreeThinker
author_rank: Frequent Contributor
timestamp: April 19, 2012, 07:21:14 am
content: Quote from: iamwhoiam on April 18, 2012, 08:14:48 pmIt would appear not,no one has bid. And 2 and a half grand P&p unbelievable. Smells like BS to me but I'm not sure. Hmm got an old Sinclair Spectrum in the loft......

author: M. András
author_rank: Super Contributor
timestamp: April 21, 2012, 12:46:07 pm
content: 2.5k postage someone made a good money from it thats for sure

author: mariush
author_rank: Super Contributor
timestamp: April 21, 2012, 12:51:35 pm
content: Yeah, with 2.5k shipping you can get on the place with the computer in your hands and deliver it in person to that guy

author: Fraser
author_rank: Super Contributor
timestamp: April 21, 2012, 05:14:45 pm
content: There was a bidder......but the bid was withdrawn.....see bid history comment:"Bidder claims his son placed a bid on this item and requested I cancel his bid"Thats what happens when you let little people near your PCHis son must really hate him.Aurora
ANZAC Day - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: April 25, 2012, 06:34:02 pm
content: On this day in 1915 British, French, Australian and New Zealand troops landed in Gelibolu, today's Turkey, not far from where I live.The cost of the landings was 130.000 lives lost from both sides. 130.000 lives lost for no reason.Let us remember them and let us remember the lesson they thought us - the value of peace.Those heroes that shed their bloodAnd lost their lives.You are now lying in the soil of a friendly country.Therefore rest in peace.There is no difference between the JohnniesAnd the Mehmets to us where they lie side by sideHere in this country of ours.You, the mothers,Who sent their sons from far away countriesWipe away your tears,Your sons are now lying in our bosomAnd are in peaceAfter having lost their lives on this land they haveBecome our sons as well.Mustafa Kemal AtatürkLieutenant-Colonel of the defendant forces.Later, founder and first president of the Republic of Turkey.

author: Unknown
author_rank: Unknown
timestamp: April 26, 2012, 01:29:54 am
content: They shall grow not old, as we that are left grow old;Age shall not weary them, nor the years condemn.At the going down of the sun and in the morningWe will remember them.

author: EEVblog
author_rank: Unknown
timestamp: April 26, 2012, 02:48:35 am
content: Indeed.And hope that never happens again.The sad part is that the British ships almost made it through, and therefore not require the Gallipoli landing at all. But they didn't know that at the time.http://www.anzacsite.gov.au/1landing/why.htmland a description of the landing:http://www.anzacsite.gov.au/1landing/bgrnd.htmlDave.

author: Unknown
author_rank: Unknown
timestamp: April 26, 2012, 10:08:03 pm
content: Quote from: EEVblog on April 26, 2012, 02:48:35 amThat's the important part. Turkish and Aussie troops had both worked it out, nearly 100 years ago, yet as a species we've been pretty poor at learning from their experiences.

author: G7PSK
author_rank: Super Contributor
timestamp: April 27, 2012, 09:34:01 am
content: War seem to be one cock up after another. Not not sure if the winner is the side that makes the most cock ups or the least.
Does Dave upload "private" YouTube videos? - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: April 20, 2012, 01:02:22 am
content: Just got an email alert that Dave had uploaded a video - GRREAAAAT!But then, it says "private":!Private videoIs that normal?

author: MikeK
author_rank: Super Contributor
timestamp: April 20, 2012, 01:23:01 am
content: So he made a private video for someone. So? Leave the man alone. I'm sure he gets harrassed enough.

author: IanB
author_rank: Super Contributor
timestamp: April 20, 2012, 01:23:25 am
content: I would wait a bit. Perhaps Dave is still working on it, or maybe he pressed a wrong button?

author: McMonster
author_rank: Frequent Contributor
timestamp: April 20, 2012, 01:24:38 am
content: I've opened it and watched just after getting e-mail notification. Haven't seen any problems in the video itself, but maybe Dave just wants to reupload a modified version? It was certainly meant for the blog.I can summarize it for you (spoiler alert), a nice board with great power-related software tools available featuring a MCU which can draw down to 20 nA (taking a small board quirk into account) in shutdown and around 1 uA with RTC+LCD running, confirmed using uCurrent.

author: EEVblog
author_rank: Unknown
timestamp: April 20, 2012, 01:48:27 am
content: Sorry, just playing around with the new Youtube upload screen.There are several reasons why I might need to set a video to private temporarily after it's uploaded:1) Youtube has screwed up and made it public before I wanted it too. (a long standing bug)2) I often like to keep new uploaded videos private until the youtube monetisation approval process goes through.3) Sometimes Youtube has a bug that prevents me from uploading a custom or different thumbnail, and I have to set it to private before making the change to give the system the kick up the pants it needs.I wouldn't upload any "private" video to my EEVblog channel that I don't want to go public, because of the many Youtube bugs that may accidentally make it public and auto-notify all my viewers!Dave.
splitting the electron ? will ohms law still apply - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 19, 2012, 07:38:10 am
content: http://www.theregister.co.uk/2012/04/19/splitting_the_electron/

author: quantumfall
author_rank: Regular Contributor
timestamp: April 19, 2012, 08:43:14 am
content: What does it mean ? Is the Electron a fundamental particle ? Or is it all fundamentally crazy.

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 19, 2012, 08:56:42 am
content: like all good science it will lead to more questions.yeah crazy

author: onlooker
author_rank: Frequent Contributor
timestamp: April 19, 2012, 12:54:25 pm
content: The key phrase missing in the title of this thread is [split into two “QUASI particles”]. It just means in a new aspect it can be analyzed/understood as 2 particles. The quasi particle idea is not new. One example is the charge hole concept. The other is the fractional charge appeared in the quantum hall effect. As to the ohms law, it is not really a fundamental law in physics. It is only a good approximation to many macroscopic phenomenons. For the sake of argument in this regard, the nature is "fundamentally" quantum and nonlinear. Or one can argue quantum theory is just a better level of approximation.

author: Unknown
author_rank: Unknown
timestamp: April 19, 2012, 01:04:53 pm
content: As they split matter into finer and finer particles the distinction between matter and energy gets blurry. It is possible that at some level the difference would disappear altogether.

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 19, 2012, 02:12:52 pm
content: do you know we are not solid at all? let alone... physical or "material"? we are... waves!

author: quantumfall
author_rank: Regular Contributor
timestamp: April 19, 2012, 03:21:23 pm
content: Quote from: Mechatrommer on April 19, 2012, 02:12:52 pmThat explains what I see in the mirror, after the night before.

author: ee851
author_rank: Regular Contributor
timestamp: April 19, 2012, 03:59:03 pm
content: That's not a science journal. Nor does the article cite a science journal.I guess it's a newspaper? Can a UK member verify this?

author: baljemmett
author_rank: Unknown
timestamp: April 19, 2012, 04:32:24 pm
content: Quote from: ee851 on April 19, 2012, 03:59:03 pmIt's an IT news site -- beyond that, well, I haven't paid much attention to it for a few years, some of the writers there began to annoy me intensely with their somewhat tabloid approach to journalism.

author: Neilm
author_rank: Super Contributor
timestamp: April 19, 2012, 08:21:40 pm
content: Quote from: baljemmett on April 19, 2012, 04:32:24 pmThere is the occasional good story but the main reason to read it is the BOFH - and that is now very rare.Neil

author: Mint.
author_rank: Frequent Contributor
timestamp: April 20, 2012, 01:45:00 am
content: Quote from: ErikTheNorwegian on April 19, 2012, 02:18:24 pm
POP Source Code Released - Page 1
Forum section: electronics / general

author: olsenn
author_rank: Frequent Contributor
timestamp: April 18, 2012, 10:25:08 am
content: The long lost Prince of Persia source code for the AppleII has been found and released to the public. Any geeks out there that want it can grab it here:https://github.com/jmechner/Prince-of-Persia-Apple-II

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 19, 2012, 09:34:26 pm
content: QuoteHmmm...I wonder if anyone has attempted to port the code to the original Nintendo platform.
Looking for that dangerous cockney on YouTube who blows things up... - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: April 18, 2012, 10:54:17 pm
content: Hi guys. I am looking for the username of that guy on YouTube with a cockney accent, who always blows things up in his house, using massive high voltage gear etc. I watched his videos last year, but didn't bookmark him. Any ideas? He's put HV through TVs etc, blows things up...Thanks!

author: vk6hdx
author_rank: Regular Contributor
timestamp: April 18, 2012, 10:59:47 pm
content: http://youtube.com/user/Photonvids

author: EEVblog
author_rank: Unknown
timestamp: April 18, 2012, 11:03:09 pm
content: Wow, 53 videos back up already.That's a lot of work.Dave.

author: Noize
author_rank: Regular Contributor
timestamp: April 18, 2012, 11:35:43 pm
content: Health and Safety. Videos have got warnings now.Quote from: iamwhoiam on April 18, 2012, 11:06:32 pmBy the way, he is known as "The Nutter" round here boy.
Oops... - Page 1
Forum section: electronics / general

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 22, 2012, 01:03:49 am
content: Evidently, I've been testing my prototype this entire time with the main power header unsoldered to the board.

author: Mint.
author_rank: Frequent Contributor
timestamp: April 22, 2012, 02:45:43 am
content: You're not the only one, only a few days ago I wasted about 1-2 hours trying to troubleshoot my project just to find that I forgot to add all the connections to the power!

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 22, 2012, 02:56:21 am
content: The header pins were actually making solid contact with the board, so it didn't cause me any issues; they're 2.5A rated and slightly oversized compared to the standard. Didn't realize that I had forgotten to solder the power header in until I disassembled the enclosure to finish a bodge fix...and it wasn't until reassembling that I noticed the male header was lodged in its socket.

author: steve_w
author_rank: Regular Contributor
timestamp: April 22, 2012, 05:26:20 am
content: Ive done similar,your not a fair dinkum techo until you screw a few things up. It's called experience.I'll bet most of the experienced people here have a horror story or two, at least you were honest enough to share yours.Keep gaining experience :-)

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 22, 2012, 06:59:55 am
content: Sadly, my mistakes don't end there:1) Accidentally wired a virtual ground net to system ground (had a lot to do with my inner voice constantly repeating "tip to left, ring to right,sleeve to ground"), and2) botched the pin mapping of three identical SOT-23 transistors.All hardware screw ups are corrected now. It's a bit of a disappointment to work on this project alone, without a partner to bounce around ideas and proof-check each others' work. There's another group of 2 that will be presenting their project this coming Thursday. I think everyone is in agreement (myself included) that their combined efforts will justifiably earn them the 1st place prize money this semester...and I'm willing to bet that their project will pop up on hack-a-day sometime shortly thereafter.
an apology - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 19, 2012, 06:30:25 am
content: i do apologise if i have offended anyone with one of the topics i started recently.i'll be more considerate in future to the whole forum .

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 19, 2012, 08:41:31 am
content: i accept your apology, you've been very bad to me. you didnt reply to my thread and you didnt buy me a drink

author: firewalker
author_rank: Super Contributor
timestamp: April 19, 2012, 11:47:41 am
content: Drinks? When? Where?Alexander.
Suggestions on where to buy a UEi DM397? (Not Tequipment) - Page 1
Forum section: electronics / general

author: Lightages
author_rank: Unknown
timestamp: April 16, 2012, 11:13:17 am
content: Seeing as Tequipment wants far too much information about me so I can buy from them, does anyone have a good alternative place to buy UEi multimeters? I am specifically looking for the DM397.

author: Bored@Work
author_rank: Super Contributor
timestamp: April 16, 2012, 11:46:19 am
content: Amazon, eBay, and a few othershttp://www.google.com/search?q=DM397&tbm=shopDon't forget to click the Compare Prices button at the first entry.

author: cybergibbons
author_rank: Frequent Contributor
timestamp: April 16, 2012, 03:22:24 pm
content: Quote from: Lightages on April 16, 2012, 11:13:17 amI think they are the same as the Amprobe AM-140/160, Greenlee and another manufacturer as well. Does it need to be the UEi one?

author: Lightages
author_rank: Unknown
timestamp: April 16, 2012, 06:50:21 pm
content: No they it does not have to be the UEi. With all the meters available it is difficult to not miss a model or two when searching for specific criteria. Thanks for pointing those out. They are not the exact same meter but very comparable.

author: Lightages
author_rank: Unknown
timestamp: April 16, 2012, 09:03:56 pm
content: Hmmm, old age catching up with me perhaps. I have seen a thread on Amprobes here and even replied to one early in the thread. Later oin the thread there is talk about the AM140/160. It does look like a very good meter.

author: cybergibbons
author_rank: Frequent Contributor
timestamp: April 18, 2012, 06:22:44 am
content: I'm very impressed with the AM-140. It seems to be accurate, the display is very readable. It doesn't have the fancy features of higher end meters like touch hold and filtering, but it's great for bench work.

author: Lightages
author_rank: Unknown
timestamp: April 18, 2012, 06:39:58 am
content: After reviewing both the UEi and the Amprobes, the UEi looks like a better buy. It comes with the PC cable and software without having to pay extra.I hate when manufacturers make you pay extra, usually much more, for the accessories that are required to take full advantage of the equipment.

author: Kilroy
author_rank: Regular Contributor
timestamp: April 18, 2012, 11:31:13 am
content: Quote from: Lightages on April 18, 2012, 06:39:58 amAbout that cable...it's serial RS-232.Unless you have a computer with a serial port you will need to get some sort of RS-232/USB interface, and the only one I can confidently recommend here is the Tripp Lite Keyspan USA-19HS...about $30 - $40.There may be other interfaces out there that work well, but this is the only one that I have used that *always* works well.

author: Lightages
author_rank: Unknown
timestamp: April 18, 2012, 08:23:41 pm
content: Yes I know. Luckily I have many USB-RS232 adapters. The ones that I have that work only cost $5. Yes they might not work with things that really require ±12V as per the spec., but everything I have used them with so far have worked just fine.
Can anybody tell me more on this unknown RF transistor - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: April 16, 2012, 08:29:49 pm
content: Was looking through a box of odds and such and came across this pack of old RF transistors. My Google Fu cannot identify it at all, and I would love to get more info on the 50 or so I have around.

author: PA0PBZ
author_rank: Super Contributor
timestamp: April 16, 2012, 09:13:17 pm
content: I found one reference to the RF-35:saying it could be replaced by a MRF453A.http://www.datasheetcatalog.org/datasheet/motorola/MRF453.pdfSo it looks like a Shortwave (30Mhz) one, output anywhere from 35 to 60 Watt.

author: SeanB
author_rank: Super Contributor
timestamp: April 16, 2012, 09:19:18 pm
content: Thanks. Anybody have a use for them?

author: TerminalJack505
author_rank: Super Contributor
timestamp: April 16, 2012, 09:25:32 pm
content: I have a Phillips ECG catalog from 1989 that cross references RF35 to a RF Transistor with the part number ECG336. The case style for the ECG336 is different, however. The case style is a RF-50S10. Now, the ECG335 has the same characteristics has the ECG336 and appears to be the same case style as what you have--RF-50F.The parameters appear to be similar to the part PA0PBZ mentions.

author: gregariz
author_rank: Frequent Contributor
timestamp: April 16, 2012, 09:26:49 pm
content: yes .. typing RF35 into nteinc.com leads tohttp://www.nteinc.com/specs/300to399/pdf/nte335_6.pdfits also the replacement for the MRF454

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 17, 2012, 09:47:07 pm
content: Quote from: SeanB on April 16, 2012, 09:19:18 pmthey'll fly out on ebay.hams will love them

author: SeanB
author_rank: Super Contributor
timestamp: April 18, 2012, 05:33:44 pm
content: So, any Hams here who want? I don't do Fleabay.............
Incoming stuff, PC Analysis Diagnostic Motherboard POST Tester Computer PCI Expr - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: April 18, 2012, 01:27:28 pm
content: This POST card came today in the post...What can i say, just look at the picture and read the text..Ok.. got a E-mail that said.. play easy, not everybody take the joke! So hint, a POST card is a card that diagnose POST /BIOS messages if a maincard wont start of some reason.. it gives an error code that can be referd to in a error list.. Its NOT a snailmail postcard !So everybody informed.

author: free_electron
author_rank: Super Contributor
timestamp: April 18, 2012, 01:44:46 pm
content: The pessimist says the glass is half empty.The optimist says the glass is half full.We engineers say the container is twice as large as it needs to be.We physicists say the glass is neither. It is completely full, halfMathematician say that this is a problem that has been solved before.Lawyers sue the glass company because if it were to break you could hurt yourself.Am i the only one that wonders what's in it ?

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: April 18, 2012, 03:34:22 pm
content: Quote from: free_electron on April 18, 2012, 01:44:46 pmI`m NOT wondering what's in it...lets see if some finaly crack that VERY easy one! THINK Sheldon..
Diamond semiconductor LED - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 16, 2012, 05:59:06 pm
content: http://www.nature.com/nphoton/journal/vaop/ncurrent/full/nphoton.2012.75.html

author: amspire
author_rank: Super Contributor
timestamp: April 17, 2012, 12:00:13 am
content: Diamonds are a really interesting semiconductor. There are several viable ways to grow semiconductor grade diamond crystals, and if MOSFETs could be made from diamond, they would be awesome. I used to think diamond could only be grown under extreme presure and temperature, but this is not the case at all. Diamond beats everything else for thermal conductivity by a massive margin, and works at higher temperatures then other semiconductors. The only thingThe huge problem Diamond has had is you can make good P-type diamond successfully, but n-type has been the huge roadblock. There is a way to make a n-type material but it is difficult and not suited for commercial production. As a result, there is a lot of work into the peripheral uses of diamond semiconductor, like this project.Richard.
Charging LA BAtteries for Dummy - Page 1
Forum section: electronics / general

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 18, 2012, 02:45:37 pm
content: while searching for "safely charging 6v la battery". this one seems really helpfull...http://www.ehow.com/how_4830468_charge-sixvolt-battery.html#1, is the most precious... "buy a charger", and then wear gloves, and then... charge it!why on earth? they expect me not able to read the manual?
UNI-T UT61E freaks out ...  - Page 1
Forum section: electronics / general

author: LEECH666
author_rank: Frequent Contributor
timestamp: April 14, 2012, 10:26:15 pm
content: Not quite sure if I am doing smth. wrong here ...What do you think?Cheers,Florian

author: Monkeh
author_rank: Super Contributor
timestamp: April 14, 2012, 10:57:07 pm
content: Well the issue with the probes is that they're dirty. Residue from the moulding. Clean them with a PVC solvent.As for the autoranging, mine doesn't do that but it might be an odd artifact of that transformer. Send me a transformer to try!

author: T4P
author_rank: Super Contributor
timestamp: April 15, 2012, 12:31:13 am
content: Oh , nevermind , even the metrix freaks out now .

author: onlooker
author_rank: Frequent Contributor
timestamp: April 15, 2012, 01:21:07 am
content: One possible explanation is that when your ut61e is doing resistance check, the auto range switching interfares with the inductive load. Likely (theoretically), this can happen only for load with particular values. A good test is to repeat what you did in the video, but with a scope attached to see the range switching. In the worst case (theoretically) the voltage may go reversed.

author: LEECH666
author_rank: Frequent Contributor
timestamp: April 15, 2012, 02:08:20 pm
content: I just did what onlooker suggested. There are some intersting pulses there ...UT61E in auto range modePulse detail 1Pulse detail 2UT61E in manual range modeApparently my Metrix freaks out too.Cheers,Florian
Agilent U1233A problems - Page 1
Forum section: electronics / general

author: saltech
author_rank: Newbie
timestamp: January 07, 2012, 01:16:32 pm
content: I have just purchased a brand new Agilent U1233A multimeter. I started playing around with it and immediately discovered two strange behaviors or faults. In the resistance function the display is going crazy showing any values (mostly negatives) from zero to a few Mohms. When I short the probes the value displayed is -0.2. When measuring a resistor of any value also the display shows -0.2 ohms. The other problem is that when enabling the vsense feature the multimeter is beeping almost on every move making it practically useless. Anyone had the same experience with U1233A?I shot a little video showing the behavior of the multimeter in the resistance function.

author: Richard W.
author_rank: Regular Contributor
timestamp: January 07, 2012, 03:14:20 pm
content: Quote from: saltechAnd therefore: Send it back!No, serious. There is something wrong. It picks up some voltage and displays it as "negative resistance".

author: saturation
author_rank: Super Contributor
timestamp: January 07, 2012, 06:06:18 pm
content: It looks damaged. If its new, return it, Agilent has superb customer support. I do not know this model, but even the better DMM, 1272a, was released with substantial bugs but Agilent was very responsive to repairs and firmware upgrades.

author: eV1Te
author_rank: Regular Contributor
timestamp: April 15, 2012, 01:20:55 pm
content: The 1233 I use at work sometimes, does not show the incorrect readings that yours does... Must have been a bad meter that you got.
Strange Chirping Noise Comming From Uniden Phone - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: April 13, 2012, 10:48:44 pm
content: Greetings EEVBees:--Here in an old Florida house I tend to get a lot of exotic visitors of the 0,4, 6 and 8 legged kinds. Lately my phone has been waking me up with a strange chirping ring tone. I would grab it and no one was there, and no sign of a call in the memory. I thought the phone had a bug in it. Turns out the bugs were not in, but merely near the phone, which is near a window with a hole in the screen."Evabody gotta be some place."Jackie Mason 1936 -Best RegardsClear Ether

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 13, 2012, 10:55:01 pm
content: Mmmm...frog legs.Oh Florida, how I love thee.

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 14, 2012, 10:44:14 pm
content: had a similar experience when my sons reptile food namely crickets excaped and bred .it was bastard noisy at night.took weeks to get rid .in the end turned the heating off .
Batteries from metal oxide & graphene composites - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: April 16, 2012, 02:57:46 pm
content: A new battery technology is being invented every week yet none is good enough to end our dependence to fossil fuels. This one is interesting though, because it uses a sort of sandwich of graphenes with other active chemicals which is an interesting structure in itself. Besides, one of the researchers is a homey.
NASA Annual Moonbuggy Race - 2012 - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: April 15, 2012, 11:00:13 am
content: Engineering sports anyone?Here is the NASA annual moon buggy race for you. It is quite interesting to watch, good competition.Live feed here(the entire event)http://moonbuggy.msfc.nasa.gov/video_test.htmlBasic rules are1- Buggies must be designed and built by high school or college team.2- Human power only, no energy storage devices such as flywheels or springs.3- Must carry 2 passengers one male and one female4- Must fold to fit inside a space of 4 x 4 x 4 feet (feet? what century is this?)5- Time required to unfold the buggy is added to the total time.6- Buggy must be light enough to be carried by its passengers 20 feet.7- Time penalties for getting off course, setting foot on ground and pieces falling off.8- Buggy must carry a payload consisting battery box 1ft^3 a camera and 24" satellite dish. All of these can be symbolic only.Enjoy

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 16, 2012, 02:42:35 am
content: Outstanding performance by all the high school teams. Puerto Rico was really shining at this event.
UNI-T bench multimeter has flashing display backlight - Page 1
Forum section: electronics / general

author: eddydde
author_rank: Newbie
timestamp: April 14, 2012, 08:27:40 am
content: My UNI-T bench multimeter model UT804 has developed an annoying display screen flashing back-light. Starts ok for about 30 seconds then flashes randomly. I have tried the menu to turn the backlight permanently OFF but this has no effect. I could live with it permanently off!Any suggestions? Have searched for a schematic without any success. UNI-T not interested in helping me other than send it back to the factory for repair.Tnx.
Questionable eBay sellers. - Page 1
Forum section: electronics / general

author: PeterG
author_rank: Frequent Contributor
timestamp: April 11, 2012, 07:25:45 am
content: I was looking round ebay today and came across this image. I had to look twice.Regards

author: GeoffS
author_rank: Unknown
timestamp: April 11, 2012, 08:38:14 am
content: That's an oldie. When did Bankcard disappear?

author: PeterG
author_rank: Frequent Contributor
timestamp: April 11, 2012, 08:40:41 am
content: I'm thinking at least 10 years ago.Regards

author: johnboxall
author_rank: Unknown
timestamp: April 11, 2012, 12:11:45 pm
content: Quote from: GeoffS on April 11, 2012, 08:38:14 amFY 2006/2007.

author: FreeThinker
author_rank: Frequent Contributor
timestamp: April 11, 2012, 02:29:07 pm
content: Damn! Thats why I can't get my paypal account verified. Why wasn't I told?

author: PeterG
author_rank: Frequent Contributor
timestamp: April 11, 2012, 11:46:28 pm
content: Quote from: tronixstuff on April 11, 2012, 12:11:45 pmSeems Bankcard closed its doors in 2007.http://www.bankcard.com.au/history.htmI am still wondering why an ebay seller would use such an out dated graphic.Regards
Hybri Bitting Hind Teat - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: April 10, 2012, 08:26:39 pm
content: Greetings EEVBees:--Hybrids, even with doubling fuel prices, are apparently not quite there yet. see below link.http://bottomline.msnbc.msn.com/_news/2012/04/10/11101762-hybrid-owners-unlikely-to-buy-another-one-study-shows?lite"When people thought the Earth was flat, they were wrong. When people thought the Earth was spherical they were wrong. But if you think that thinking the Earth is spherical is just as wrong as thinking the Earth is flat, then your view is wronger than both of them put together."Isaac Asimov 1920 - 1992

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 10, 2012, 08:58:17 pm
content: I hate how the media constantly refer to "recent studies" conducted by scantly clad for-profit organizations who never seem to openly publish any of their data.

author: IanB
author_rank: Super Contributor
timestamp: April 10, 2012, 09:51:23 pm
content: Hybrids are mostly pointless compared to small efficient conventional cars.

author: NiHaoMike
author_rank: Super Contributor
timestamp: April 11, 2012, 04:19:40 am
content: Quote from: IanB on April 10, 2012, 09:51:23 pmNot for business use that gets a lot of stop and go, where it pays off pretty quick. You also get a bunch of efficiency features that technically are not related to hybrid technology (Atkinson cycle and better aerodynamics, for example), but some regular cars are starting to have that as well. The real deal is to upsize the batteries so that short trips can be electric only. It's still difficult to make up the cost for individual use, however.What is always true and will remain true is that by learning to drive more efficiently (hypermiling), the incremental advantage of hybrid technology is quite low. When possible, coasting is always more efficient than regenerative braking. It is also possible to prove that carefully timing traffic lights is not only the most efficient way to go through them but also the fastest.Maybe we should be spending more effort on developing a computer to detect and track traffic light timings in order to inform the driver of timing information. Computers are cheap nowadays as are very accurate timebases (quartz + GPS). What we're lacking is good software for processing video and extracting data from a very wide range of conditions.I once read an IEEE paper comparing traffic light timing to electrical signal timing. The idea is similar - you're traveling from one end to the other, going through several stages (buffers) in between. If you arrive at a stage too early or too late, you have to wait. The main difference is that while electrical timing problems are usually solved by changing the length of the path, traffic light timing problems (assuming the traffic lights are out of your control) can only be solved by changing your speed.
schematics and manuals - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 11, 2012, 02:42:13 pm
content: any chance of having a schematic and maunals section ?

author: FreeThinker
author_rank: Frequent Contributor
timestamp: April 11, 2012, 02:55:34 pm
content: There is a sticky in the beginners section for books, you could probably start a new thread there.
EX-530 and the big bad spot - Page 1
Forum section: electronics / general

author: cowboy303
author_rank: Regular Contributor
timestamp: April 09, 2012, 10:27:13 pm
content: Once upon a time there was this boy. He had this multimeter. He liked his multimeter.One hot sunny day his tractor stopped working so he took his multimeter in the field to fix it.First he checked the battery voltage and every thing looked fine so he turned the min/max on to see what it did when he tried to start it.he left the multimeter in the sun for about 15 minutes. And when he came back to his horror there was a big black spot in the middle of the display!The little boy ran to put his multimeter in the shade and after 10 minutes all was good againWill the boy ever know what was up with it?Or if that was bad for his meter?Or if it is common for multimeter's to do that?

author: Psi
author_rank: Super Contributor
timestamp: April 09, 2012, 10:53:37 pm
content: I've never heard of that happening but i suspect it's due to heat expansion of the lcd panel at different rates.Probably pushes on the lcd substrate.

author: ivan747
author_rank: Super Contributor
timestamp: April 10, 2012, 12:04:19 am
content: The EX-330 doesn't have a min/max mode, does it?LCDs are quite sensitive to heat. Just let it rest, it might fix it.

author: cowboy303
author_rank: Regular Contributor
timestamp: April 10, 2012, 12:15:30 am
content: Quote from: ivan747 on April 10, 2012, 12:04:19 amSo sorry EX-530 I will change it up top.Thanks.

author: grenert
author_rank: Frequent Contributor
timestamp: April 10, 2012, 12:40:54 am
content: I don't know the physics behind this phenomenon, but it is definitely common with LCD screens. Fortunately, I've never seen a case where things didn't completely resolve when the screen cooled down.

author: Shale
author_rank: Contributor
timestamp: April 10, 2012, 02:32:53 am
content: thats normal. will also happen if you leave it on the dash of a hot truck. Ive had my fluke 83 do it a couple times in the field. never hurt it that i found. I don't like when it happened though. makes me nervous.

author: retiredcaps
author_rank: Super Contributor
timestamp: April 10, 2012, 03:14:25 am
content: Fluke 87III in Iraqhttp://www.fluke.com/Fluke/usen/community/fluke-news-plus/ArticleCategories/DMMs/Fluke+in+Iraq.htmI have been using my Fluke 87-III DMM here in the desert, but the display goes black quite regularly from the heat.

author: cowboy303
author_rank: Regular Contributor
timestamp: April 10, 2012, 01:07:39 pm
content: Thanks Guys.I'm glad to hear my meter will be fine.Thanks you all.
High Resolution 3D Printer - Page 1
Forum section: electronics / general

author: David
author_rank: Frequent Contributor
timestamp: April 09, 2012, 09:03:33 pm
content: Hi all,I am not sure if this has been posted on the forums yet (a very quick search came to no avail) so please point me in the direction if so.I came across this blog via Hackaday and I am very impressed with what I have seen (asides from cost, lack of open source...):http://3dhomemade.blogspot.co.uk/Essentially this is a 3D printer with a very high resolution. Instead of extruding hot plastic, the machine uses a special light sensitive resin to 'print' high quality parts! The quality looks very good and the machine itself is relatively simple (1 axis, DLP project...). The guys have a form of Kickstarter campaign over at Indieogo if anyone is interested:http://www.indiegogo.com/veloso3dprinterI don't think it will be long until we see these type of machines replacing the 'traditional' hot extrusion types. I wouldn't be surprised if there wasn't already an open-source version somewhere!Dave

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 09, 2012, 09:10:03 pm
content: This type of 3d printer has been around for ages - possibly one of the earliest types , using lasers - the problem is up to now the resin has been very expensive - they are claiming to be able to get down to $150/kilo which could get more interesting.

author: David
author_rank: Frequent Contributor
timestamp: April 09, 2012, 09:11:49 pm
content: Am I right in saying to is essentially the same as SLS (Selective Laser Sintering) ?
microfab humour - Page 1
Forum section: electronics / general

author: amyk
author_rank: Super Contributor
timestamp: April 08, 2012, 11:12:54 am
content: Who here tends to pay attention to regularly grounding themselves even when using regular consumer electronics in dry weather? Seeing pictures of ESD carnage really did it for me.After discharging into my laptop and causing the wireless card to stop working until I rebooted, and having done it twice, I don't trust the built-in protections too much now.
Farnell DTV 20 20Mhz Dual trace Oscilloscope - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: April 06, 2012, 03:13:11 pm
content: Hi does any one know anything about the Farnell DTV 20 20Mhz Dual trace Oscilloscope, I have found one on ebay and am wondering if it is worth going after or not, do they have any shortfalls or weakness that I should be aware of.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 06, 2012, 03:51:55 pm
content: From memory a very old, basic analogue unit - I suspect barely worth the postage

author: G7PSK
author_rank: Super Contributor
timestamp: April 06, 2012, 03:55:39 pm
content: Thanks for that, I will leave it alone.

author: Fraser
author_rank: Super Contributor
timestamp: April 06, 2012, 05:08:48 pm
content: I know them quite well.HT transformer winding has a habit of failing, which marks the units end of life.Aurora

author: grumpydoc
author_rank: Super Contributor
timestamp: April 06, 2012, 10:09:12 pm
content: Probably not worth it, even without a weakness for failed transformers, as there's virtually no info on these kicking about the web. If you're going to buy an old analogue 'scope stick to something that you can get user and service manuals for which mostly means Phillips, Tek and Hameg although I've just finished repairing/recalibrating a pair of Hitachi's (a V665 and a V1065) and I have to say they're quite nice 'scopes. The V665 is 60Mhz and the 1065 is 100Mhz, dual time-base, cursors - quite modern for an analogue 'scope from the late 80's (based on date stamps on the IC's the two I have were built in 89/90 and 88/89 respectively).There are much better choices on ebay at the moment.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 07, 2012, 12:35:30 am
content: Quote from: grumpydoc on April 06, 2012, 10:09:12 pmI had a Hitachi scope a long while ago - pretty good. Trio also made some nice mid-range analogue scopes.

author: G7PSK
author_rank: Super Contributor
timestamp: April 07, 2012, 01:30:24 pm
content: Trio were made by Kenwood weren't they. I like the Kenwood transceivers.

author: saturation
author_rank: Super Contributor
timestamp: April 07, 2012, 02:16:21 pm
content: Trio was the original name. Kenwood originally was a brand name for distribution. As Kenwood established a reputation Trio named themselves Trio-Kenwood, then Kenwood alone. ~ 2006, the MTE arm of Kenwood split off as Texio.http://www.texio.us.com/In the 1980s I used to see a lot of Trio MTE gear in Asia, and Kenwood brand was mostly consumer oriented gear. I didn't know the brands were related. I noticed the exact same gear in the US, with Kenwood, Trio-Kenwood, Radio Shack or Heathkit name on it, so I checked it out.Here's what the parent Japanese site says:http://www.texio.jp/english/company/histry.htmlFWIW, Trio gear were very well made, but moderately good specs at the time. Kenwood MTE gear are a class on their own even today.The history:http://en.wikipedia.org/wiki/Kenwood_Electronics
Jim Marshal - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: April 05, 2012, 09:12:54 pm
content: I have just seen on the TV that Jim Marshal of the amplifier fame has died at age 88. When I was a teenager I used to cycle to the next village (Milton) where he had a factory for making speakers and scavenge broken speaker magnets. The factory was just one end of a long prefab building on what was once a quarry the other end was used by a firm called Cambridge forklifts, Behind that was the remains of the quarries power plant which was driven by a beautiful old Paxman diesel.

author: wkb
author_rank: Super Contributor
timestamp: April 05, 2012, 09:14:50 pm
content: Quote from: G7PSK on April 05, 2012, 09:12:54 pmIs that the Marshal of the PA systems used by rock bands and the like?

author: baljemmett
author_rank: Unknown
timestamp: April 05, 2012, 09:27:43 pm
content: Quote from: wkb on April 05, 2012, 09:14:50 pmYep:http://www.bbc.co.uk/news/entertainment-arts-17625335

author: G7PSK
author_rank: Super Contributor
timestamp: April 05, 2012, 09:28:23 pm
content: Yes that's right Marshal amplifiers as used by most electric guitar players.

author: Ajahn Lambda
author_rank: Regular Contributor
timestamp: April 05, 2012, 11:37:52 pm
content: Rest in peace, Jim. You will be missed.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 06, 2012, 12:09:07 am
content: Spinal Tap - 11

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 06, 2012, 01:12:43 am
content: From B3ta.com :