hybridfree/eevblog-posts huggingface dataset:
complying with local electric code while protectinng your equipment. - Page 1
Forum section: electronics / general

author: jh15
author_rank: Frequent Contributor
timestamp: December 07, 2013, 05:58:12 am
content: I am not allowed to "daisy chain" cheap crappy power strips for a radio station master control room. I understand.I have on hand 12/3 flex cable, metal dual duplex outlet boxes, and mov's on hand.Can I legally build an "extension cord" to the studio console with 2 4 outlet boxes and put ge mov's inside?

author: Psi
author_rank: Super Contributor
timestamp: December 07, 2013, 06:09:13 am
content: Without telling us which country your in how can we know?

author: KJDS
author_rank: Super Contributor
timestamp: December 07, 2013, 11:15:09 am
content: If in the UK, for a commercial operation, check to see what your Professional Indemnity insurance allows you to do. I suspect that applies to a lot of other countries too.
12 Tips on How to select your next Oscilliscope - Page 1
Forum section: electronics / general

author: skjafar
author_rank: Contributor
timestamp: March 13, 2013, 12:22:39 pm
content: I happened to pump into two documents from Agilent for selecting oscilloscopes, one is a basic "12 Tips for selecting oscilloscopes", and the other is specifically for choosing appropriate Bandwidth for your oscilloscope. I hope they will be useful for someone.Could not attach files, anyway check google docs links:https://docs.google.com/file/d/0B1VHyx017qntdW1hT3BVTFlLNEU/edit?usp=sharinghttps://docs.google.com/file/d/0B1VHyx017qntVk04M21nX3NuX28/edit?usp=sharing

author: HackedFridgeMagnet
author_rank: Super Contributor
timestamp: March 13, 2013, 12:53:39 pm
content: I'll give them a read.google is so annoying these days.pdf linkshttp://cp.literature.agilent.com/litweb/pdf/5989-5733EN.pdfhttp://cp.literature.agilent.com/litweb/pdf/5989-0552EN.pdf

author: Smokey
author_rank: Super Contributor
timestamp: December 10, 2013, 12:24:12 am
content: I was about to start a new post about this. I just got an email from my agilent rep about the "12 tips" app note. Here is the link to the full app note. It's biased to Agilent stuff of course, but it's also a pretty good overview of what makes a good scope.http://www.home.agilent.com/agilent/redirector.jspx?action=obs&nid=-11144.0.00&lc=eng&cc=US&ckey=2364265&pubno=5991-2714EN&ltype=&ctype=AGILENT_EDITORIALand a link to the youtube webcast they did.
Blast From the Past - Page 1
Forum section: electronics / general

author: cubemike99
author_rank: Contributor
timestamp: December 06, 2013, 04:44:44 pm
content: I was working on some computers today in one of my university's graduate labs and saw some grungy looking panels in a corner. Wasn't sure what they were until I saw the label.There were about 5 4'x6' panels that are more than twice my age.

author: TheEPROM9
author_rank: Frequent Contributor
timestamp: December 06, 2013, 08:56:48 pm
content: That's a slip in the uni bag item. My area of equipment gathering is the uni WEEE bin =-)
Not all rulers are equal - Page 1
Forum section: electronics / general

author: JuKu
author_rank: Frequent Contributor
timestamp: December 04, 2013, 09:14:47 pm
content: I bought some super accurate rulers fromhttp://www.schaedlerprecision.com/. I found out that when I bought my steel ruler for my mechanical work, I apparently made a good deal and got more steel than I paid for...

author: HackedFridgeMagnet
author_rank: Super Contributor
timestamp: December 04, 2013, 10:55:24 pm
content: maybe just save the steel rule for when your working outside in winter.

author: opablo
author_rank: Regular Contributor
timestamp: December 05, 2013, 04:49:15 pm
content: QuoteSource:http://www.schaedlerprecision.com/special.htmso... if I send them a ruler (any brand, any kind, any physical conditions)... I get a 50% off ?...huh... this people really like rulers...

author: SeanB
author_rank: Super Contributor
timestamp: December 05, 2013, 08:37:21 pm
content: Good way to advertise........
Energy Innovation Conference - Page 1
Forum section: electronics / general

author: timbob
author_rank: Contributor
timestamp: December 15, 2013, 02:49:10 am
content: https://www.energyconf.org/a energy conference held at my school

author: lemmegraphdat
author_rank: Frequent Contributor
timestamp: December 15, 2013, 08:40:21 pm
content: Quote from: timbob on December 15, 2013, 02:49:10 amAn actor....perfectly appropriate. There is no such dwindling of fossil fuels.
Is dithering or spread-spectrum really a benefit? - Page 1
Forum section: electronics / general

author: Gelf54
author_rank: Contributor
timestamp: December 05, 2013, 03:36:28 am
content: I'd have thought that the apparent lower emissions is really just due to the fact that on the spectrum analyser display we just see the effect of the signal peak (the same size as a non-dithered signal) passing through the frequency response window of the spectrum analyser in asignificantly short time.I don't have the equipment to experiment myself. Wouldn't a tracking signal analyser (or a sufficiently wide frequency window) show the same level as it followed the changing frequency? If so, where is the benefit, other than creating intermittent interference on even more frequencies? What am I missing?

author: marshallh
author_rank: Unknown
timestamp: December 05, 2013, 03:50:41 am
content: It's all about shenanigans to make it easier to pass FCC testing. I'd argue it has no "benefit". And additionally it can be a major source of headache because depending on the app SS clocking may be implemented differently causing problems between devices. For example, how do you decide to sweep 0-5000ppm or -2500, 2500ppm?

author: EEVblog
author_rank: Unknown
timestamp: December 05, 2013, 04:06:08 am
content: Quote from: marshallh on December 05, 2013, 03:50:41 amThat's basically the score.Apart from the FCC testing, benefit to who and under what circumstances (if any) is entirely case-by-case. In fact, it can even make things worse.

author: NiHaoMike
author_rank: Super Contributor
timestamp: December 05, 2013, 04:14:47 am
content: In communication systems, it's much easier to reject a constant frequency than it is to null a constantly changing signal.

author: peter.mitchell
author_rank: Super Contributor
timestamp: December 05, 2013, 04:48:20 am
content: It can be useful in lower frequency PWM applications, for things like LED or Motor control, because the slight variations will reduce flicker and strobing in LEDs, and in motors, it will reduce the vibrations and noise at specific frequency leading to higher lifespan and quieter/softer operation (also useful in some cases to prevent stalling at really low rpm).But for anything near RF, it's pretty much just compliance bullshit.

author: Gelf54
author_rank: Contributor
timestamp: December 05, 2013, 07:04:25 am
content: Thanks all. I was starting to wonder if my IQ had become inversely proportional to the growth rate of my ear hair.
Must see in Shenzhen? - Page 1
Forum section: electronics / general

author: sacherjj
author_rank: Frequent Contributor
timestamp: December 07, 2013, 02:29:50 pm
content: Anyone have some must sees if I have some free time in Shenzhen?

author: amyk
author_rank: Super Contributor
timestamp: December 08, 2013, 10:16:37 am
content: The SEG and all the other shops around it are the best known, see here:http://www.bunniestudios.com/blog/?p=3526
iOS & sockets - Page 1
Forum section: electronics / general

author: psydefects
author_rank: Newbie
timestamp: December 03, 2013, 01:36:19 am
content: Hello all,If anyone can give me a straightforward definite answer That could save me a lot of time , since I'm very new to the iOS and it's origins, I am very familiar with the unix/system v approaches though which share a lot in common with bsd to begin with, anyhow I need to find out if 3rd party developers are allowed to exert full control in sockets, and that includes pretty much anything? Foremost sniffing , inspection and dynamically updating an iPad's routing table but messing only with 3rd party creating and cloning sockets, the uninvited ones and not any others? Anyone?Thanks in advance

author: IanB
author_rank: Super Contributor
timestamp: December 03, 2013, 01:58:37 am
content: This is an interesting choice of forum to be asking a software question on.But my best knowledge of the answer is no, you cannot do what you like. If you will be uploading your app to the App Store, then you are only allowed to use the permitted set of APIs in allowable ways. Your app will be unlisted if you do not work within the documented guidelines.The best way to answer this question is to go to the authoritative source: Apple.

author: NiHaoMike
author_rank: Super Contributor
timestamp: December 03, 2013, 05:18:53 am
content: In summary, Apple isn't very friendly to small third party developers. Stick with Android if you like to tweak stuff.

author: amyk
author_rank: Super Contributor
timestamp: December 03, 2013, 12:00:09 pm
content: Very likely no by default, but jailbroken you can do anything... and if you're creating some sort of low-level networking tool then your userbase is much more likely to already have jailbroken devices anyway.
Latest Altzone video...... - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: November 30, 2013, 12:05:23 pm
content: Really dirty video this. Really dirty.brought back memories of basic training, with less shouting and with daylight as well.

author: steve30
author_rank: Frequent Contributor
timestamp: December 01, 2013, 02:00:19 am
content: Looks fun, although I'd have hoped for a bit more 'running'.Dave actually looks quite sexy in this video.

author: peter.mitchell
author_rank: Super Contributor
timestamp: December 01, 2013, 02:57:38 am
content: If i was from sydney i'd have definitely gone, nothin better than getting covered in mud and making an ass of yourself! Would have been a nice day for it too.

author: Psi
author_rank: Super Contributor
timestamp: December 01, 2013, 12:33:19 pm
content: The timing of this is pretty funny, today i had to wade through mud 1 foot deep to retrieve my RC plane from a marsh. Got totally covered in mud myself.

author: Hydrawerk
author_rank: Super Contributor
timestamp: December 01, 2013, 06:35:49 pm
content: Yes, Dave looks much better than this epic LeCroy guy.
Anybody else notice the 100k+ milestone? - Page 1
Forum section: electronics / general

author: staxquad
author_rank: Frequent Contributor
timestamp: December 02, 2013, 09:00:00 am
content: Wasn't anywhere near that not too long ago.

author: AndreasF
author_rank: Frequent Contributor
timestamp: December 02, 2013, 09:09:26 am
content: Dave hadtweetedabout it last week as he was getting close to the 100k mark.

author: Galenbo
author_rank: Super Contributor
timestamp: December 02, 2013, 11:23:00 am
content: Why celebrate 11000011010100000 or 186A0 subscribers?
Altering image so it comes into focus for the eye - Page 1
Forum section: electronics / general

author: AlfBaz
author_rank: Super Contributor
timestamp: December 02, 2013, 01:58:18 am
content: If you place an LCD, say your phone's for example or even a piece of paper with something on it, right up to your eye, about the same distance as the lens of a pair of glasses, is it possible to alter that image (ie render or draw it differently) so that it appears in focus at such a close range or would you have to use optics (if possible at that close a range).

author: AlfBaz
author_rank: Super Contributor
timestamp: December 02, 2013, 02:01:40 am
content: "Near eye display" seems to be one search term

author: Kryoclasm
author_rank: Regular Contributor
timestamp: December 02, 2013, 03:02:23 am
content: Quote from: AlfBaz on December 02, 2013, 01:58:18 amYou need to have a projected display with an optics system to mimic the distance that you want it to virtually appear at.This cannot be done in the manner you described. Your eye cannot focus that close, and there is not a proper amount of light available at this distance for a passive system.

author: Psi
author_rank: Super Contributor
timestamp: December 02, 2013, 03:23:46 am
content: You can modify ski goggles and add a 200mm box made from foamboard to build FPV goggles to fly an RC plane.The closest we found where the screen was conformable to view was ~200mm from the eye.Also, adding a Fresnel lens about halfway between gave a bigger picture and seemed to make it easier on the eyes.If you want to view really close you can use a lens like in the oculus rift, they are available to buy, just Google for them.But they will stretch the image around your field of view which can be a bit weird if you don't correct for it somehow.

author: amyk
author_rank: Super Contributor
timestamp: December 02, 2013, 07:21:47 am
content: Quote from: Psi on December 02, 2013, 03:23:46 amDon't forget about the eyestrain.

author: Psi
author_rank: Super Contributor
timestamp: December 02, 2013, 09:55:26 am
content: Quote from: amyk on December 02, 2013, 07:21:47 amThe eyestrain is more to do with a bad quality picture.With perfect optics and enough resolution there shouldn't be any eyestrain at all.The brain may be confused by the motion and produce headaches though.
GPIB adapter hack feasibility - thoughts? - Page 1
Forum section: electronics / general

author: c4757p
author_rank: Super Contributor
timestamp: December 03, 2013, 02:40:37 am
content: After searching for quite some time for a GPIB interface I could afford (without severe buyer's remorse), I came across a National Instruments GPIB-232CV-A quite cheap. This is an RS232-GPIB converter. Now, by itself it's good enough for most of my purposes, but it could be a lot better: this adapter only supports addressing one device, set by DIP switch. In fact, all of its functionality is set by switches, and it just tosses data from one interface to the other.However, the manual claims that it uses National's NAT4882 GPIB ASIC. This chip handles all of the GPIB transactions and control systems, and is not programmable, so this is not where multiple address support is missing/disabled. My guess of the architecture of the adapter is that it contains a microprocessor which moves data between a UART connected to the serial port and this NAT4882. The processor, as far as I can see, wouldn't do very much. I think the most complicated thing it would have to do is mediate the DMA connection to the ASIC.Considering all the hardware is there, and the real functionality is in the ASIC, I am considering attempting to reversibly replace the built-in processor with an AVR running custom code. It should have no problem tying into the UART and the NAT4882 control lines, and I don't even have to bother with DMA if I don't want to, because that can be disabled in a control register. Can anyone think of a reason why this would be a lot harder than it seems? I've got a lot of projects going on simultaneously and don't really want to bite off too much.NAT4882 datasheet available fromhere
Akihabara Radio Store closing its doors - Page 1
Forum section: electronics / general

author: Rory
author_rank: Frequent Contributor
timestamp: November 30, 2013, 03:57:27 am
content: http://www.japantimes.co.jp/news/2013/11/25/national/legendary-akihabara-radio-store-closing-its-doors-after-six-decades/Made many trips to Japan but never to Tokyo, but I always wanted to visit Akihabara. Sad. Danged otaku more interested in manga, anime and games. Too bad.

author: amyk
author_rank: Super Contributor
timestamp: November 30, 2013, 10:26:09 am
content: Visit the SEG in Shenzhen instead...

author: Kryoclasm
author_rank: Regular Contributor
timestamp: December 01, 2013, 02:16:24 am
content: Been to Akihabara many times back in the late 90's.I remember that vendor mall as well, as I recall, they had a lot of electronic components. It was kinda like a 1970's radio shack, but way more stuff.They also had lots of computer items and a ton of cell phones.
Web Cam OCR data logger? - Page 1
Forum section: electronics / general

author: Lightages
author_rank: Unknown
timestamp: December 02, 2013, 01:37:02 am
content: I was looking for a web cam program that can OCR a multimeter or any other type of display and then log the data to a csv or similar file. I have looked quite a bit and have found nothing except for an Intel Education software package and some other half baked references to some ideas. Anyone see anything like this? It seems like it is a no-brainer and I assumed someone would have written something along these lines a long time ago.

author: BravoV
author_rank: Super Contributor
timestamp: December 02, 2013, 01:49:57 am
content: Had the same thought when I saw OpenCV (http://opencv.org/) while ago, its just my programming skill is very lacking.The "idea" is using phone to do the video smart recognition of the meter's reading, while logging and sending the data stream either through bluetooth or wifi.Just an idea.
UTP over fuse box - Page 1
Forum section: electronics / general

author: BlinkY
author_rank: Contributor
timestamp: November 29, 2013, 06:10:50 pm
content: Hi everyone.My question is simple (I hope)Is it feasible to suggest that a UTP (un-shielded twisted pair) passing over a home fuse box would cause interference with the cable? Would this then reduce the quality of the internet propagating through the cable?Also, in this case, the definition of passing over is to be read as resting on the fuse box.(I can provide pictures if possible[size=78%])Many thanksBlinkY

author: Monkeh
author_rank: Super Contributor
timestamp: November 29, 2013, 06:30:58 pm
content: It shouldn't cause any significant issues, but YMMV.It may well, however, be in contravention of the wiring regulations.
Appliance wiring? - Page 1
Forum section: electronics / general

author: MacAttak
author_rank: Unknown
timestamp: November 29, 2013, 04:19:01 am
content: Perhaps I don't know the correct name of this stuff, but I've not been able to find a decent source. I am talking about the wire that you find inside of small heating appliances (such as toasters, ovens, etc). It is typically sheathed in a fiberglass mesh insulation. I believe the conductors (usually stranded) are steel or perhaps some other alloy? It's certainly not bare copper. Or at least not usually.Can someone point me in the right direction for this? I just need a small spool of it - not a huge amount.

author: Kryoclasm
author_rank: Regular Contributor
timestamp: November 29, 2013, 04:26:24 am
content: I'm betting it is tungsten wire.Yup, nichrome...http://en.wikipedia.org/wiki/Nichrome

author: Paul Moir
author_rank: Frequent Contributor
timestamp: November 29, 2013, 04:34:01 am
content: Uh, I think he means the wire, not the heater.I only know it as "high temperature wire". Apparently this is TGGT wire, and is nickel plated? Anyway the important thing is you can usually get spools or reasonable quantities at appliance repair places.EDIT: I mean appliance repair parts places. The older the better.

author: MacAttak
author_rank: Unknown
timestamp: November 29, 2013, 07:03:41 am
content: Thanks. Yes, I was looking for the connection wire. Not resistive heating wire.

author: G7PSK
author_rank: Super Contributor
timestamp: November 29, 2013, 09:02:41 am
content: MG wire is the high temperature one TGGT is low temp.http://wire.thermalwire.com/viewitems/cable-600v-single-conductor-538-176-c-to-125-176-c/8-176-c-600v-heavy-duty-high-temperature-lead-wirehttp://www.infraredheaters.com/wires.htmlOr HTMG. there seems to be lots out there with different names a wire for every occasion.http://www.omega.com/pptst/htmg.html

author: Rory
author_rank: Frequent Contributor
timestamp: November 29, 2013, 05:58:49 pm
content: OK, you meant high temperature hookup wire.http://www.alphawire.com/en/Products/Wire/Hook-Up-Wire/PremiumFilter by temperature, they have Mica/Glass insulated from 2ga to 20ga. -55 to 538CQuick search on Amazon gives several vendors.http://www.amazon.com/High-temperature-wire-AWG-roll/dp/B001ALN0JG/ref=pd_sim_sbs_hi_1
Single quoting? - Page 1
Forum section: electronics / general

author: zapta
author_rank: Super Contributor
timestamp: November 29, 2013, 04:07:29 pm
content: When I reply to a post, the new post inherit by default multiple nested quotes. Is there a way (e.g. settings) to tell it to copy only the top level post to which I am replying? Currently I am cleaning it up manually each time.I am using other forums with vBulletin and vBadvanced and this is how they behave.

author: Stonent
author_rank: Super Contributor
timestamp: November 29, 2013, 04:15:29 pm
content: I think you'll have to manually do it.
Realising why something was so cheap - Page 1
Forum section: electronics / general

author: netdudeuk
author_rank: Frequent Contributor
timestamp: November 29, 2013, 09:07:05 am
content: HiI've bought loads of items from Hong Kong. I've been very pleased with most of the purchases but there have been some things that looked ok at first only to be a let down later on.Here are a few examples. Maybe others have got more to add ?Cheap breadboards. Metal inserts have minimal springiness so they soon get tired of gripping wires, causing flaky connections which can waste your time and drive you mad.Anti-static PCB brush. Turns out that brushing off the flux residue left a coating of brush, devolved by the PCB cleaner. That could be me though. Maybe you can only use horse hair brushes for that purpose ?Kynar wire. It looks ok until you actually try using it. I had some that had the insulation shooting right up the wire once I put the iron onto it and the board. I've bought a load of a different wire from someone else and it's so much easier and quicker to work with. Loads of rework needed with the other stuff.

author: netdudeuk
author_rank: Frequent Contributor
timestamp: November 29, 2013, 09:19:22 am
content: Just seen another example. Dave's SMD connectors that melt in the reflow oven.
Stratasys (Makerbot) Sues Afinia (UP Printer) - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: November 28, 2013, 09:36:01 am
content: Douchebags alert...http://makezine.com/2013/11/27/stratasys-sues-afinia-ramifications-for-the-desktop-3d-printing-industry/

author: SeanB
author_rank: Super Contributor
timestamp: November 28, 2013, 06:27:43 pm
content: Infill methods, most likely already covered by patents held by HP for use in laser printers and related to economode used to increase cartridge life. So a patent for material reduction by infill already applied to printers..... Most likely predates the other claimed patents by a few years. Also used by plants and sponges.

author: johnnyfp
author_rank: Frequent Contributor
timestamp: November 28, 2013, 07:22:37 pm
content: How to alienate the OpenSource Community. Oh wait, do exactly what Makerbot are doing.It's a shame really, and what really bothers me is that Joe Blogs won't know any better and still buy from them.

author: Bored@Work
author_rank: Super Contributor
timestamp: November 28, 2013, 07:43:43 pm
content: Begun the Clone War has.

author: c4757p
author_rank: Super Contributor
timestamp: November 28, 2013, 08:37:38 pm
content: Does "embrace, extend and extinguish" sound familiar?Embrace the 3D printing community."Extend" refers to adding features to spoil a standard. Equivalent enough to "file a shitload of patents"; that accomplishes the same alienation.And now, Extinguish.Part of every company's unwritten playbook.

author: JoannaK
author_rank: Frequent Contributor
timestamp: November 29, 2013, 03:03:34 am
content: Well.. I kinda expected something like this start to happen when Makerbot got the VC money. The VC want their investmets to make money and don't care a **** about complexities of idea, future or commonity. IIRC Makerbot tried (not sure if successfull?) patent some commonity known ideas (like automated build platform) as their own.Kinda shame that companies like Stratasys have been sitting on their A**es for decade (or more) and have not been able/willing to develop their own technilogy further, but instead must keep competition out this way.Ah well, good thing is that this shit won't harm that much on Open source users/makers. Open source hardware and software are so widely spread that Stratasys has no way (nor would it ever be profitable) to sue each of the makers. I'm sure they can harm some people, but overall it'll be their loss. And it's not the money, their public imago can't take the hit.
Old cassete radio - Page 1
Forum section: electronics / general

author: Simon123
author_rank: Regular Contributor
timestamp: November 26, 2013, 09:43:33 pm
content: Hello!I have repaired old germanium transistor radio from 60-70 and i dont know what model it is, and more data about it.I just know it was made by RIZ-Radio Industrija Zagreb in Croatia.So does anywhone have more data about it?https://lh5.googleusercontent.com/-w3VbXlAI9B0/UpT7j5NPYoI/AAAAAAAAAPs/W3Ew-P3FzaM/w398-h551-no/DSC00943.JPGhttps://lh4.googleusercontent.com/-dOFXrDN9tZU/UpT7sGIbsJI/AAAAAAAAAP8/vL9qwwQ7nBo/w702-h527-no/DSC00939.JPG

author: fluxcapacitor
author_rank: Frequent Contributor
timestamp: November 26, 2013, 11:09:45 pm
content: the best i can find is a later model at the radiomuseum.http://www.radiomuseum.org/r/riz_4_band_radiorecorder_ste.htmlI`m sure they would appreciate if you could upload some pictures to them.

author: G7PSK
author_rank: Super Contributor
timestamp: November 27, 2013, 09:37:19 am
content: That looks very much like the old ITT machines from the same period. Would they be copies.

author: seoiot123,
author_rank: Newbie
timestamp: November 27, 2013, 10:33:05 am
content: thanks to provide this information,....

author: Simon123
author_rank: Regular Contributor
timestamp: November 27, 2013, 01:34:19 pm
content: Thanks, looks like it uses sanyo mechanism.http://farm3.staticflickr.com/2750/4405200950_2da0f29153_o.jpgIs normal for this, to have positive voltage, where normaly ground would be on microphone and audio jacks?

author: SeanB
author_rank: Super Contributor
timestamp: November 27, 2013, 07:32:57 pm
content: Yes, they often use a positive ground as generally you commonly got PNP germanium transistors. So the supply common is battery positive, with the main power supply rail being a negative voltage and all the inputs and outputs being on this common positive rail. No different than what is now common convention with NPN transistors, just the supply voltage polarity. Makes no other difference.

author: Zero999
author_rank: Super Contributor
timestamp: November 28, 2013, 02:29:54 pm
content: Quote from: G7PSK on November 27, 2013, 09:37:19 amProbably.Quite often, electronics made by eastern bloc are just inferior copies of US/Japanese equipment.
Paste Special in Excel 2003 - Page 1
Forum section: electronics / general

author: GK
author_rank: Super Contributor
timestamp: November 28, 2013, 09:44:37 am
content: I've got 7200 cells in column B containing the formula SIN(Ax), where x=the respective row number (1 to 7200). I now need to duplicate this formula in to rows 1 through 7200 of column C, with a minor addition so that the formula becomes SIN(Ax)*D1, where D1 is a coefficient value located in (obviously) cell D1. Using Paste Special (multiply) for all cells in column C I can only get the value entered into cell D1 to copy over - i.e. the formula becomes SIN(Ax)*3 instead of SIN(Ax)*D1. I NEED TO COPY THE F%$#ING CELL REFERENCE (D1) NOT THE F&^$ING ENTERED VALUE (3 OR WHATEVER).I cannot sit here and manually type the correct formula into 7200 cells. Someone please help before I headbutt my computer out of the window.

author: alanb
author_rank: Frequent Contributor
timestamp: November 28, 2013, 09:53:52 am
content: try SIN(Ax)*$D$1 and then use normal paste. The '$' converts from a relative reference to an absolute reference.

author: peter.mitchell
author_rank: Super Contributor
timestamp: November 28, 2013, 09:58:00 am
content: Usually when I do stuff like that in excel, I type say. .. 10 cells, then smart expand, usually picks up the pattern fine.

author: GK
author_rank: Super Contributor
timestamp: November 28, 2013, 10:25:42 am
content: Quote from: alanb on November 28, 2013, 09:53:52 amThank you!
Apple fined Samsung. Samsung paid... - Page 1
Forum section: electronics / general

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 25, 2013, 04:46:05 pm
content: not sure what lawsuit case, but made me laugh nonetheless. a brilliant way to....Samsung pays Apple $1 Billion

author: mortos360
author_rank: Regular Contributor
timestamp: November 25, 2013, 05:01:16 pm
content: This story was online for a long time now and its fake.. as far as I know.

author: george graves
author_rank: Super Contributor
timestamp: November 25, 2013, 05:13:00 pm
content: http://www.snopes.com/politics/satire/samsung.asp

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 25, 2013, 05:48:13 pm
content: ohh wonderful internet!

author: tom66
author_rank: Super Contributor
timestamp: November 25, 2013, 06:15:34 pm
content: Unfortunately, if it were true, as funny as this sounds, any reasonable judge would consider said action to be deliberately disruptive and probably, in the very least, demand compensation for the costs of counting and depositing such money.The fake "Koreanglish" is quite funny.
The Engineering Wiki - Page 1
Forum section: electronics / general

author: michael.hill
author_rank: Unknown
timestamp: November 24, 2013, 03:21:25 pm
content: I'm aware that wikis have been done in the past for the eevblog and was overrun with spammers and such. I'm not sure of the whole story because I wasn't around for it.I really like the idea of being able to share information with other engineers, especially little "tricks" that we've learned to "fast forward" through "first principles". My idea is to provide a platform for all areas of engineering, not just electronics. I thought I'd start here because the eevblog has quite an active community. Full disclaimer: this is by no means publicly presentable yet. I don't know too much about what I'm doing, but I'm learning as I go. So far, I just have Mediawiki installed with pretty much every spam filter wikimedia recommends. The current permissions require an account to create/edit articles, but everyone can read them, which I think is sufficient. I'm really looking for some people who would help create an organized structure for a wiki before a real public launch. I'm having issues importing LUA-based templates from Wikipedia (portals, etc.)I'm not looking to make money off of this, I just want this resource available to engineers.Any help would be great. Please reply here if you can help out (I need to change some permission to allow others to create accounts I think). Yes, the server is slow, I know. I just want to be sure this is something there is some interest in before I scale up. And yes, there is no logo yet. Anyone know anybody?The URL ishttp://engiwiki.comThanks,MichaelSent from my iPhone usingTapatalk2

author: lapm
author_rank: Frequent Contributor
timestamp: November 25, 2013, 01:04:36 pm
content: Whitelist it, otherwise you have strong spambot infestation in no time.
Proprietary batteries - Page 1
Forum section: electronics / general

author: Stonent
author_rank: Super Contributor
timestamp: November 25, 2013, 05:11:38 am
content: My Jeep has a rechargable flashlight that snaps into the ceiling. I've only had a need for it about 3 or 4 times but it stopped working about a year ago. Today I finally popped it out and opened it up and it has this.http://www.siambattery.co.th/images/Varta%20V500HT.jpgThe specs say 500MaH 1.2V NiMhwhich is basically a rechargable AAA battery.The Varta battery sells for about $15 on ebay. What was the point of using this battery? A AAA battery would have been perfectly fine. Grrr.

author: nukie
author_rank: Frequent Contributor
timestamp: November 25, 2013, 05:41:08 am
content: Varta advertise this button cell designed for trickle charging, overcharging capabilities and special seals for extreme outdoor operations. I don't think it look like an AAA battery. Many electronic auto mains timer uses this for clock battery, and it gets pretty hot when plugged in, its pretty good battery as far as I know.

author: Stonent
author_rank: Super Contributor
timestamp: November 25, 2013, 05:46:11 am
content: Well since it was covered in crusty green crystals... I'd probably have preferred the AAA battery. I might try to hack one in there if I can.

author: Bored@Work
author_rank: Super Contributor
timestamp: November 25, 2013, 05:58:30 am
content: Quote from: Stonent on November 25, 2013, 05:11:38 am2 Euro at this shop in the Belgium. Price is almost too good if it is normally $15http://www.microbatteryshop.com/PBSCProduct.asp?ItmID=11707521
Magnetic putty. - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: November 23, 2013, 09:45:08 am
content: I came across this today, magnetic putty, it reminds me of one of those awful 1950's B movies like the blob etc.https://lh5.googleusercontent.com/-4HZXkhaxTFs/Uo90uvfj8SI/AAAAAAAAQJI/_xVvUI65k5Y/w506-h750/tumblr_mtcddasJvi1s96utdo1_400.gif

author: Psi
author_rank: Super Contributor
timestamp: November 23, 2013, 09:46:52 am
content: heh, thats awesome

author: peter.mitchell
author_rank: Super Contributor
timestamp: November 23, 2013, 11:01:36 am
content: Quote from: G7PSK on November 23, 2013, 09:45:08 ami'm pretty sure thats just a putty with ferromagnetic material impregnated in it, and that is a cube shaped neodymium magnet...

author: SeanB
author_rank: Super Contributor
timestamp: November 23, 2013, 11:18:47 am
content: Om nom nom nom............

author: rollatorwieltje
author_rank: Unknown
timestamp: November 23, 2013, 11:26:49 am
content: TaoFledermaus did this, he used laser printer toner:

author: Kaptein QK
author_rank: Regular Contributor
timestamp: November 23, 2013, 02:36:38 pm
content: Does not look like the silly putty itself is magnetic like the one in the first post.Toner is just fine powdered plastic.

author: senso
author_rank: Frequent Contributor
timestamp: November 23, 2013, 02:54:21 pm
content: Isn't black tonner made with some iron oxide?

author: Kaptein QK
author_rank: Regular Contributor
timestamp: November 23, 2013, 07:43:05 pm
content: You are right, it is carbon, iron oxide and plastic.But it did not work that good, I see people get better result with just iron oxide.
Austraalia..  - Page 1
Forum section: electronics / general

author: JoannaK
author_rank: Frequent Contributor
timestamp: November 23, 2013, 01:07:08 am
content: It's not only the landlife that's there just to kill you..http://www.dailymail.co.uk/sciencetech/article-2511854/The-Cookii-monster-Huge-deadly-pink-jellyfish-discovered-100-YEARS-seen-Australian-coast.html

author: digsys
author_rank: Unknown
timestamp: November 23, 2013, 01:26:18 am
content: yuuummmmm cookieeees <drool> :-)

author: strangelovemd12
author_rank: Regular Contributor
timestamp: November 23, 2013, 02:41:21 am
content: And as a public service, some info on it that doesn't come from the Daily Mail.Good to see Dr. Hawking has a Youtube channel. I love his books.

author: SeanB
author_rank: Super Contributor
timestamp: November 23, 2013, 05:52:18 am
content: The captioning even has errors with the computer generated voices...... But it is a lot better than with the Dave voice.

author: Stonent
author_rank: Super Contributor
timestamp: November 23, 2013, 06:21:47 am
content: Coming soon to a sushi bar near you!

author: SeanB
author_rank: Super Contributor
timestamp: November 23, 2013, 07:04:20 am
content: Something more deadly than Salmonella or Fugu?

author: Mike S
author_rank: Contributor
timestamp: November 23, 2013, 02:30:27 pm
content: Reminds me of this image.

author: tszaboo
author_rank: Super Contributor
timestamp: November 23, 2013, 03:43:58 pm
content: Is that a deadly underwater broccoli, I always feared from?
Problems connecting to EEVBlog forums. - Page 1
Forum section: electronics / general

author: zapta
author_rank: Super Contributor
timestamp: November 23, 2013, 03:50:20 am
content: In the last several days I encountered problems connecting to these forums. Typically it's an error message regarding a database. I do get the EEVBlog page, just not the content.Anybody else having this problem?

author: Rory
author_rank: Frequent Contributor
timestamp: November 23, 2013, 03:53:36 am
content: https://www.eevblog.com/forum/news/forum-outage/
£0.01 GPS module - Page 1
Forum section: electronics / general

author: amyk
author_rank: Super Contributor
timestamp: November 20, 2013, 12:19:58 pm
content: I stumbled across this:http://www.buildyourowndrone.co.uk/MediaTek-MT3329-GPS-10Hz-Adapter-Basic-p/gps-mt3329.htmMaybe that's why they're sold out...But seriously, it's amazing how cheap GPS modules have become (< £10 last time I checked).

author: nitro2k01
author_rank: Frequent Contributor
timestamp: November 20, 2013, 02:01:18 pm
content: Rather, it's likely that they've set the price to £0.01 as a default when it's sold out. £0.01 is certainly a tad too low, yes.

author: BravoV
author_rank: Super Contributor
timestamp: November 20, 2013, 02:06:51 pm
content: ^^^ +1Tips , if you want a benchmark for common easy to find stuff, try search for similar item at Aliexpress first or Taobao (just look at the price, ignore the Chineese lang), then you will have the idea if the price is realistically low or not.

author: Stonent
author_rank: Super Contributor
timestamp: November 21, 2013, 06:23:16 am
content: 1 Pence?! 1 Pence?!?! A Chinese sweatshop could fly you to the moon on 1 Pence!

author: kayvee
author_rank: Regular Contributor
timestamp: November 21, 2013, 06:25:24 am
content: Nah, only half way.

author: JohnnyGringo
author_rank: Regular Contributor
timestamp: November 21, 2013, 08:08:54 am
content: Do euros less than 1.00 have names? Such as nickles, dimes, quarters...

author: poorchava
author_rank: Super Contributor
timestamp: November 21, 2013, 09:01:33 am
content: Ya, eurocents

author: opty
author_rank: Regular Contributor
timestamp: November 21, 2013, 11:13:27 am
content: Quote from: mojo-chan on November 21, 2013, 10:38:11 amMore like Latin, cent, centrum - a 100th, centi- a 1/100 ...

author: AndersAnd
author_rank: Frequent Contributor
timestamp: November 21, 2013, 11:31:12 am
content: Quote from: nitro2k01 on November 20, 2013, 02:01:18 pmA woman goes to her butcher Feinberg and asks the price of lamb chops."$2.50 a pound," he tells her."But Cohen across the street sells them for $2.00 a pound," she protests."Nu, so go buy from Cohen," says the butcher."He's all out," she explains."Oh," says Feinberg, "when I'm out of lamb chops they're only $1.50 a pound."

author: amyk
author_rank: Super Contributor
timestamp: November 21, 2013, 01:09:36 pm
content: Quote from: mojo-chan on November 21, 2013, 10:38:11 amI dug around a little more and found the IC itself sells for <£2:http://detail.1688.com/offer/1198487098.htmlIt's odd how big the price range is: I've found modules with the same IC and antenna selling for more than £50, so most of it is profit.
Help to read date code - Page 1
Forum section: electronics / general

author: bitwelder
author_rank: Super Contributor
timestamp: November 20, 2013, 07:21:38 am
content: Hello,yesterday I went to buy a few 74hc4050 from the local shop,and when I later I examined them I tried to find when they have been produced (just for fun).I was expecting something on the line of the old YYWW (year-week) scheme, so the gobbledygook on this chip was quite a surprise.As much as I could follow TI datasheet, two possible 7-symbols schemes could apply, a UZXYYTT-type (from NatSem) or a YMLLLLS one, but with neither I was able to make sense of the letters.I only got the final E4 as lead finishing (= preplated leads, lead free).Can somebody help to decode it please (possibly with pointers to TI datasheet table) ?

author: fluxcapacitor
author_rank: Frequent Contributor
timestamp: November 20, 2013, 12:35:16 pm
content: Heres a few pointers that will help you decode it.http://www.ti.com/litv/pdf/szza020chttp://focus.ti.com/quality/docs/gencontent.tsp?templateId=5909&navigationId=12626&contentId=5071
Physical Construction Techniques of Point-Contact and BJT's - Page 1
Forum section: electronics / general

author: beaker353
author_rank: Unknown
timestamp: November 23, 2013, 06:54:59 am
content: I'm working on a research'ish paper for my college Solid State I class. The assigned subject was transistors; past, present, and future. If so desired, we are able to limit the scope of the paper to a given area. I chose to limit my paper on the physical construction of point-contact and BJTs. I'm finding quite a bit of information on early point-contact designs as well as emerging technologies for faster, more efficient designs for the future.One area I am struggling to find information that isn't miles over my head is current day manufacturing/construction techniques. The information seems to either be very basic theory (like the basic PNP theoretical model we have all seen in textbooks), or some really high level multilevel stuff in super fast FPGAs or modern processors. I'm looking for more along the lines of what I would find in a 2N2222 I got out of the lab supply drawer if I could pull out the die and look at how it was constructed and why.For example, I found some information below that describes a silicon fabrication process to create a transistor (line type drawing). Pretty basic information, but it's kinda what I'm looking for. However, when I run across die photos like below, I see all types of strange shapes that I'm not 100% sure what I'm looking at (attached photo). Is the idea to increase the depletion zones surface area to increase current carrying capability or does this somehow relate to the transistor beta? I'm having trouble find this level of not basic, but not advanced, information.I am by no means asking for you guys to do my work for me. Just maybe a bit of guidance where I should be looking for my information. Thanks!-EM

author: SeanB
author_rank: Super Contributor
timestamp: November 23, 2013, 07:27:55 am
content: Hard to find die pics, though i have a whole load of Motorola databooks ( remember those) which have the pages with the different die shapes in it.That is a 2N3055/2N3773 which has the fingers. They are there to increase the active area, as the junction is formed between the edges of the base and emitter junctions (emitter to the middle of the die, left pin in photo. Base is the outer side, top pin in photo. Collector is to the bottom and in this unit the case) so you either have a long die, which has problems with the current flow along the long surface differing along the device unless you place multiple bond wires ( used in RF power devices to reduce capacitance and lead inductance) or you fold it into the fingers that you have here. This allows a single cheap bond wire to handle a high current.
Quiet Day - Page 1
Forum section: electronics / general

author: echen1024
author_rank: Super Contributor
timestamp: November 21, 2013, 04:27:11 am
content: Quiet day on the forums today... not much in the Test Equipment or Projects section going on. *yawn* I think I should sleep now...

author: TheBorg
author_rank: Frequent Contributor
timestamp: November 21, 2013, 04:31:11 am
content: Good plan. I did try to visit the forum a few hours ago and it threw a database error again. Perhaps that could be one reason not a lot has been posted.

author: Ton
author_rank: Regular Contributor
timestamp: November 21, 2013, 07:27:43 am
content: web site was unavailable from europe most of yesterday,DNS gave an IP, but IP was unavailable from early afternoon and all evening.

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 21, 2013, 07:44:55 am
content: Quote from: echen1024 on November 21, 2013, 04:27:11 amyes you should! its 3PM now on the other side of the world.Quote from: TheBorg on November 21, 2013, 04:31:11 amditto! i believe some agencies tried to hack eevblog while dave is asleep. my plan when the error occured is "get back to reality"

author: BravoV
author_rank: Super Contributor
timestamp: November 21, 2013, 07:57:10 am
content: Quote from: Mechatrommer on November 21, 2013, 07:44:55 am<conspiracy theory lover mode:ON> ...Maybe those "G+G" thingy have implanted "something" while server was down ? .....PS : Definition of "G+G" ....Google "G+" retaliation .. in cooperation with ... "G"-Man since there are too many reverse engineering infos that have been published & originated from this forum that pissed off some gov/military contractors.<conspiracy theory lover mode:OFF>
how old is this philips light bulb - Page 1
Forum section: electronics / general

author: johnh
author_rank: Regular Contributor
timestamp: November 19, 2013, 12:08:20 am
content: During a renovation the builders found 2 light globes. Does anybody now what vintage they are?Have cleaned it up some what. Filament vaporisedHouse was build about 1912 ~ 1914

author: IanB
author_rank: Super Contributor
timestamp: November 19, 2013, 12:17:06 am
content: What kind of bulb is it? It's hard to tell from the picture, but it seems like it might be a neon lamp? Night light?

author: johnh
author_rank: Regular Contributor
timestamp: November 19, 2013, 02:19:18 am
content: No. I think its a standard light bulb. I need to clean it some more.I can just make out the word "Philips"

author: ScottE
author_rank: Newbie
timestamp: November 19, 2013, 02:31:18 am
content: It looks like an early tungsten filament so I guess it around 1910-1925, but it is hard to tell from the picture.

author: Psi
author_rank: Super Contributor
timestamp: November 19, 2013, 02:33:22 am
content: Does it go?

author: IanB
author_rank: Super Contributor
timestamp: November 19, 2013, 02:41:18 am
content: Quote from: Psi on November 19, 2013, 02:33:22 amIf you try it, use a low voltage supply like a variac and wind it up slowly. There's a good chance if you just whack 240 V up it it will perish instantly.

author: amyk
author_rank: Super Contributor
timestamp: November 19, 2013, 01:21:36 pm
content: Quote from: IanB on November 19, 2013, 02:41:18 amAnd the mains voltage might not have been 240V at that time either.

author: aargee
author_rank: Frequent Contributor
timestamp: November 20, 2013, 10:44:55 am
content: ... and it depends if it was before or after the light-bulb consortium to limit bulb life.

author: johnh
author_rank: Regular Contributor
timestamp: November 20, 2013, 10:53:14 am
content: No it doesn't go filament is blown. See the photo I added to the original post

author: bookaboo
author_rank: Frequent Contributor
timestamp: November 20, 2013, 11:56:05 am
content: Still a nice find, I wonder if it's possible to get inside and fit a new filament somehow.Google carefully first though, could be one of those things worth more broken but untouched.

author: Kjelt
author_rank: Super Contributor
timestamp: November 20, 2013, 12:16:15 pm
content: For a nice perspective here is a rare Philips movie from 1924 black/white no sound how they made the bulbs by hand and mouth.From 2 minutes onwards if you have no time to see the entire introhttp://www.geschiedenis24.nl/speler.program.23957774.html
[Rumour] PS4 Assembly Line Reportedly Sabotaged by Foxconn Interns - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: November 19, 2013, 06:54:49 pm
content: http://www.dailytech.com/Foxconn+Interns+Reportedly+Damaged+PS4+Consoles+Sony+Celebrates+1+Million+Sales+in+24+Hours/article33765.htm