hybridfree/eevblog-posts huggingface dataset:
Anyone successful modd a GW sfg-1003 from 120v to 230v? - Page 1
Forum section: electronics / general

author: implor
author_rank: Regular Contributor
timestamp: May 10, 2011, 08:42:49 pm
content: Have anyone tried to modd a 1003 to 230v ? there is markings on the PCB for 230v but no easy way to change.

author: bilko
author_rank: Frequent Contributor
timestamp: May 10, 2011, 08:55:15 pm
content: Can you post some photos please ?

author: firewalker
author_rank: Super Contributor
timestamp: May 10, 2011, 09:35:19 pm
content: I think that Instek uses standard transformers. So it should be something relatively easy.Check Dave's number 5 blog and the next video.

author: implor
author_rank: Regular Contributor
timestamp: May 11, 2011, 05:56:09 pm
content: The big issue so far is that I can't get the knobs off, Any idea? they are of the same type as in the video.

author: bilko
author_rank: Frequent Contributor
timestamp: May 11, 2011, 06:38:27 pm
content: If you RTFM it tells you how to take the case apart. It might not necessarily use the same type of PSU as it is a different generation piece of kit.

author: implor
author_rank: Regular Contributor
timestamp: May 12, 2011, 08:21:07 am
content: The transformer can be change to 230v, but I need to get the basterd out of the case to solder
Purchasing via MicrochipDIRECT - Page 1
Forum section: electronics / general

author: tjw
author_rank: Contributor
timestamp: May 04, 2011, 01:50:30 pm
content: Hi,I need to buy some Microchip products and was wondering whether anyone here has any experience dealing with MicrochipDIRECT ?Having read comments regarding TI's estore (both good and bad), how does MicrochipDIRECT compare ? Or should I just buy from Element 15/RS/Digikey ?BTW, I am in Australia.Thanks, tjw.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 04, 2011, 05:53:26 pm
content: They're fine but be sure to check the shipping amount.They will also program, mark & re-reel parts very cheaply

author: Frangible
author_rank: Regular Contributor
timestamp: May 05, 2011, 06:11:01 pm
content: They're fine. I've only made a few purchases, but they were delivered quickly. I wasn't worried about pricing and delivery costs - I needed a compiler and emulator quickly to handle a fast project...

author: Neganur
author_rank: Unknown
timestamp: May 05, 2011, 09:30:45 pm
content: I recently purchased a few items from them.Placed the order monday morning and the courier delivered it wednesday. I like that.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 05, 2011, 09:38:44 pm
content: Quote from: Frangible on May 05, 2011, 06:11:01 pmMost software products can be purchased for immediate download.

author: metalphreak
author_rank: Frequent Contributor
timestamp: May 07, 2011, 11:28:47 am
content: They're pricing and shipping speed is pretty good. Usually only takes 2-3 days to your door. Shipping cost is $17 though regardless of how small your order is.

author: Trigger
author_rank: Regular Contributor
timestamp: May 08, 2011, 06:16:01 am
content: They're good, and if you create your account with an .edu email you'll get an automatic 25% discount on all dev tools and software. That comes in really handy when you're buying the more expensive items.

author: Frangible
author_rank: Regular Contributor
timestamp: May 11, 2011, 03:03:38 pm
content: Quote from: mikeselectricstuff on May 05, 2011, 09:38:44 pm"Emulator" as in MPLAB real ICE. That had to come FedEx.
Smart test leads by FLUKE  (video)  - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 04, 2011, 05:40:13 am
content: http://assets.fluke.com/video-ACC/TL-175/3857978A-TL175-Promo-English-No-Logo.html

author: Drirr
author_rank: Regular Contributor
timestamp: May 04, 2011, 06:27:57 am
content: Perfect probes. Is it possible to buy them somewhere? What about the price?When I'm measuring on the breadboard, my probes sometimes connect components each other, becouse the are not isolated near the tip.edit :http://cz.farnell.com/fluke/tl175e/test-leads-premium-1-2m-fluke-tl175e/dp/1827186really cheap

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 04, 2011, 02:01:34 pm
content: Many moons ago, I found tubing that was just smaller than the threads on my probes. Then I manually threaded them on when I needed isolation. This is definitely faster and harder to loose.

author: Ernie Milko
author_rank: Regular Contributor
timestamp: May 04, 2011, 03:27:42 pm
content: I find bog-standard multimeter probes far too clunky for electronics work. Those do look a little better than most.I use these test leads more than any other I've got:-Pomona, very thin probes and very sharp points:-http://uk.farnell.com/pomona/6275/test-lead-with-ss-tip-probe/dp/4135799Fluke retractable; the 'Heineken' of probes:-http://uk.farnell.com/fluke/tl40/test-lead-set-fluke-tl40/dp/3890545

author: gobblegobble
author_rank: Regular Contributor
timestamp: May 09, 2011, 10:30:11 pm
content: Quote from: Drirr on May 04, 2011, 06:27:57 amComing soon to every multimeter as stock and onto every shop as an only option you'll be able to buy, as they're mandatory for higher CAT rated stuff. Either that or more clunky approach like the one of Amprobe's:https://www.eevblog.com/forum/index.php?topic=3329.0

author: saturation
author_rank: Super Contributor
timestamp: May 10, 2011, 11:52:59 am
content: Thanks a bunch, K. Here's the motherload of material on the Fluke leads:http://www.fluke.com/Fluke/usen/Distributors/TL175_Launch_Page.htmReasonably priced, $24 retail.Quote from: Kiriakos-GR on May 04, 2011, 05:40:13 am

author: Bored@Work
author_rank: Super Contributor
timestamp: May 10, 2011, 06:31:34 pm
content: Quote from: Drirr on May 04, 2011, 06:27:57 amIf you are in a hurry before your new probes arrive, put some heatshrink tubing on the tips of your old probes.
How to use long memory on Rigol DS1052E? - Page 1
Forum section: electronics / general

author: Lion251
author_rank: Newbie
timestamp: May 10, 2011, 02:46:28 pm
content: I received my brand new Rigol DS1052E last week. Firmware 2.05 SP2.So far, it looks really nice. Intuitive in operation, not too much noise.But I have a problem with using the 'long memory' option.I press 'Acquire', and under MemDepth, I select 'Long Mem'.But when I then take a measurement, I don't know how to access the long memory that has supposedly be stored.When I scroll with Horizontal - Position or zoom in with Horizontal - Scale buttons, I get to see only a little of my signal, and at a low resolution.I'm trying to debug a serial communications problem.Data is at 10 Mbps, and the whole exchange lasts only tens of us.With 250 Msps (2 channels, long memory), and 1 million points, it should be easy to capture everything in sufficient detail, but I don't seem to know how to.I have attached two captured images to show what I'm seeing.Can anyone help me with this?-- Update: OK, I've found one way to do it: set triggering to 'Single Sweep' instead of 'Normal'.Not a big problem, just remember to press Run/Stop before you run the experiment.I have added a new screenshot taken in Single Sweep mode.

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 10, 2011, 11:56:18 pm
content: you are capturing at 2us/div (newfile1) and stop... zooming to 200ns (newfile0) and expect it to high fidelity? no, my scope did this too. the only thing you can get like in the (singleshot) is capturing and viewing at the same s/div, 200ns in your case. its digitized resolution issue, cant get rid of it.

author: Psi
author_rank: Super Contributor
timestamp: May 11, 2011, 01:17:41 am
content: from memory.... Set the scope so it triggers at the start of the signal and have the timebase set so it gives a clear image of the individual pulses. Then, once captured press stop and zoom out / move left or right / zoom in etc..

author: Lion251
author_rank: Newbie
timestamp: May 11, 2011, 07:40:17 am
content: Quote from: Mechatrommer on May 10, 2011, 11:56:18 pmEhhh.... the 'singleshot' file was taken at 200 us/div(!!!), then zoomed in, so I could see the overview of the whole exchange, then zoomed in to 200 ns/div to look at the individual bytes. The key was setting the trigger to 'single sweep' instead of 'normal' or 'auto'.Psi: It appears that, if triggering is set to 'normal' or 'auto', long memory isn't used at all.I only get it to work in 'single sweep' mode'If I set the timebase so it gives a clear view of the pulses during capture, and use 'normal' or 'auto' triggering mode, I can zoom out only one extra screen or so.The pulses are 100 ns, one exchange takes 20 us or so, and two exchanges are approx 2 ms apart.By starting at 200 us/div, my sample rate is 100 Msamples/sec, so I have 10 data points per pulse.Then, I can zoom in to the level of singleshot.png, or zoom out so I can see the second exchange as well, and zoom in on that.This is the way I expected long memory to work, but it would be useful if the manual would mention that it only works in single sweep mde.
Most of Agilent's handheld LCR meters appear to have been discontinued - Page 1
Forum section: electronics / general

author: slburris
author_rank: Frequent Contributor
timestamp: April 08, 2011, 08:44:19 pm
content: Except for the U1701A, all of the U17XX series handheld LCRmeters are showing up as discontinued on Agilent's web site,including my several months old U1732B.No sign of any replacements, I wonder what's up?Maybe Grainger is going to have a blowout on these next! :-)Scott

author: gobblegobble
author_rank: Regular Contributor
timestamp: April 08, 2011, 10:04:22 pm
content: Both U1701A and U1701B seem to stay. But isn't the U1701A/B actually more of a "C meter" instead of a "LCR meter"? At least they toute it as 'Handheld Capacitance Meter' only.What's also interesting that they bother to keep both A and B models up: the specifications for both are 100% identical while for the DMM models they at least had minor differences. Same identicality goes also for the discontinued U173*A/B models.

author: saturation
author_rank: Super Contributor
timestamp: April 09, 2011, 09:53:42 am
content: Interesting. The handheld line of Agilent has much higher turn over than Fluke, so something to watch in the new products arena and deals if they exist.

author: EEVblog
author_rank: Unknown
timestamp: April 09, 2011, 10:52:32 pm
content: Wow, so they are.http://www.home.agilent.com/agilent/product.jspx?nid=-34196.0.00&cc=US&lc=engI guess I shouldn't bother to review my U1732B any more?Dave.

author: ElektroQuark
author_rank: Unknown
timestamp: April 10, 2011, 05:50:42 am
content: I was about to pick one, but finally the ESR capacity of the BKPrecision meter won.

author: saturation
author_rank: Super Contributor
timestamp: May 08, 2011, 08:54:42 pm
content: Bryan, an Agilent business development manager and engineer posted at element14.com that a new LCR series is set to launch June 14, 2011.http://www.element14.com/community/message/23292#23292

author: EEVblog
author_rank: Unknown
timestamp: May 08, 2011, 10:28:45 pm
content: Looks like the cats out of the bag.Yes, they have a new updated LCR meter coming, and they are trying to get me one before it's released.I told them about the discontinuation notice and it turns out someone was a bit premature on the website announcement, they have since removed the notice.I don't know the reason for discontinuing the B version meter not long after it was released. Most likely because they have a completely new design available. They seen to be moving away from the original Escort designs entirely for various products.Dave.
FBI Gps Tracker Teardown - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: May 09, 2011, 03:43:42 pm
content: http://www.wired.com/threatlevel/2011/05/gps-gallery/http://www.wired.com/threatlevel/2011/05/gps-video/
Digital scope features real-time digital triggering - Page 1
Forum section: electronics / general

author: orbiter
author_rank: Frequent Contributor
timestamp: May 13, 2011, 02:48:40 pm
content: See if ya can get hold of one of these for testing Dave? Whoaaa.. Looks awesome.http://www.elektor.com/news/digital-scope-features-real-time-digital.1810582.lynkxhttp://www.rohde-schwarz.co.uk/en/Products/Test_Measurement/Oscilloscopes/RTO.html

author: scrat
author_rank: Frequent Contributor
timestamp: May 13, 2011, 07:59:15 pm
content: Seems a revolutionary scope, but... They claim no missed trigger events, but have a 1Mwfm/s rate. What if I'm trying to trigger on every event at 1.1MHz?

author: Rufus
author_rank: Super Contributor
timestamp: May 13, 2011, 08:28:43 pm
content: How many of Dave's viewers are in the market for a scope costing around 20k Euro with another 15k Euro of optional extras?

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 13, 2011, 09:25:03 pm
content: Quote from: Rufus on May 13, 2011, 08:28:43 pmHow many people who watch other kinds of porn can afford the goods on display

author: johnmx
author_rank: Frequent Contributor
timestamp: May 13, 2011, 11:14:07 pm
content: I have one RTO1022 at work (demonstration unit). This scope is cheaper than Tek or Agilent ones and it looks very powerful.Today I did some basic tests for some minutes, nothing too advanced. I only explored 0.1% of its capabilities.After 5 minutes it crashed! No surprise, it runs over windows embedded! Also it takes too long to start-up.It has some nice-looking menus, but too fancy for my taste. The touch screen is very annoying. It’s difficult to touch very close to the edge of the screen and you need to do that in order to close some windows. The best option is to use a mouse, but that’s a necessary requisite for every scope of this class.For the first impression I think it’s very hard to use although the interface was meant to be user friendly. But it’s simpler compared to any Tek scope.As a final note, let me tell you that the blind time between waveforms can be very low (<200ns) but this is only valid in ultra-segmented-mode which is limited to a fixed number of acquisitions.I also have one Tektronix MSO5204 (demonstration unit) but I didn’t have time to test it.
Seeed Studio updates their Fusion PCB service! - Page 1
Forum section: electronics / general

author: shadewind
author_rank: Frequent Contributor
timestamp: May 09, 2011, 07:24:21 am
content: Seeed Studio have updated their PCB service to include more finishing options, board thicknesses an size choices. And the price is lower too... It starts at $10! There's some competition for iTeadhttp://www.seeedstudio.com/blog/2011/05/04/fusion-pcb-service-upgraded-with-even-lower-pricing/

author: allanw
author_rank: Frequent Contributor
timestamp: May 09, 2011, 03:02:58 pm
content: Seriously amazing stuff.
What do you think about Intel's new tri-gate transistor announcement? - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 07, 2011, 11:21:30 pm
content: http://news.cnet.com/8301-13924_3-20059431-64.htmlQuote

author: allanw
author_rank: Frequent Contributor
timestamp: May 08, 2011, 01:41:45 am
content: I'm amazed we can keep shrinking the process by the same amount time after time, considering how crappy the performance of short-channel transistors are (other than raw speed).
replacing a wall wart - Page 1
Forum section: electronics / general

author: haglered
author_rank: Contributor
timestamp: May 08, 2011, 01:15:42 pm
content: I read this question in another forum and I thought I would like you guys to give me a perspective on it.I recently had a "wall wart" power supply go bad on some equipment. I wasable to find an identical power supply to replace it, but as I was goingthrough my box of orphaned power supplies, it got me to thinking....These things are typically labeled with volts, amps, and polarity. Forexample, the power supply I replaced was 5 volts, 2 amps, and positive inthe center. I was once told by a trusted electrician that a replacementpower supply had to be no more than 1 volt off what the equipment calls for(and some would not agree with that), at least equal in amps, and the samepolarity. So in my case, I was looking for a power supply that was 4, 5, or6 volts, and at least 2 amps, with positive in the center.Now, I also know that 5 volts x 2 amps = 10 watts. So what would happen ifI found a power supply that was 4 volts and 2.5 amps? Or 3 volts and 3amps? Or for an extreme example, 10 volts and 1 amp?I guess what I'm asking is, can I just go by watts, or do I need to payseparate attention to the volts and amps? How close do I need to be?

author: Hypernova
author_rank: Unknown
timestamp: May 08, 2011, 01:25:03 pm
content: It depends on what the equipment is capable of handling, some will indeed just pull more current at a lower voltage. But there is a drop off point where they will just refuse to work. Unless you take it apart and look up the part's datasheet or experiment you just won't know. Although +5% and -10% should be a decent ball park figure.

author: Zero999
author_rank: Super Contributor
timestamp: May 08, 2011, 01:45:58 pm
content: Quote from: haglered on May 08, 2011, 01:15:42 pmThat depends on the application.There are two types of wall wart: regulated and unregulated, the former maintain the same voltage regardless of the load and the latter don't, the voltage is higher off load than on load. Generally switched more PSUs are regulated but this isn't always the case with cheaper units.Most 5V appliances need a stable 5V supply and typically have fairly tight tolerances i.g. 4.5V to 5.5V so a 6V supply might damage it, especially if it's not regulated.QuoteIn this case I wouldn't recommend replacing it with anything other than 5V >2AQuoteIf the voltage is too low, the device might not work properly, if the voltage is too high, it might be damaged.If the current rating is too low, the adaptor might shut down or could overheat and stop working permanently.Also don't go too overboard on the current if the wall wart isn't regulated because the voltage could be too high.QuoteAs above make sure the voltage matches as closely as possible and if it's 5V make sure you use a regulated 5V supply. As a generaly rule, you'll be fine if the PSU is regulated and the current rating is the same or higher than required by the device.
Quartz crystal resonates - Page 1
Forum section: electronics / general

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: May 07, 2011, 01:00:13 am
content: I have been googling for analysis of spurious resonances in crystal quartz filters and got this:http://www.omnivos.com/products/12%22-Aqua-24k-Gold-Crystal-Singing-Bowl.htmlYou can order 3-rd eye frequency but "exact pitch" still costs extra $25. Never mind, you are protected!QuoteGive us a call?! I would have expected them to just sense the lack of resonance remotely by directly transcending through time-space continuum bullshit and just teleport it back.We are in the wrong business ladies and gents.

author: Bored@Work
author_rank: Super Contributor
timestamp: May 07, 2011, 07:31:26 am
content: Ikea glas cylinder, 3 for £17.35http://www.ikea.com/gb/en/catalog/products/30150559For an extra £100 I promise I do the higher thoughts resonant process for you - from remote. Just send the money, and your Ikea glass cylinder will filter and cleans away negative influences which cloud your thought.
Show room about multimeters and more in Poland + (video)  - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 03, 2011, 09:29:34 pm
content: This is an example what they can see , the ones who travel allot .All the big players under a single roof .http://www.automaticon.pl/english/

author: PetrosA
author_rank: Frequent Contributor
timestamp: May 04, 2011, 02:39:29 am
content: Duzo ciekawostek na pewnoThe only problem is, multimeters are more expensive there than they are here...It's a shame this show is now and not in June when I'm going to be in Poland. It would be worth the trip to Warsaw.

author: PetrosA
author_rank: Frequent Contributor
timestamp: May 04, 2011, 02:52:49 am
content: One example:Customer comes in off the street, not a business, has to pay VAT tax and wants a Fluke 233.tequipment.net price - US $299 (plus 5% discount on web orders today)grainger.com price - US $330.75 (probably the most expensive US source for anything!)merazet.pl "promotional" price - US $505.17 (list price - US $597.10) incl. VATSo almost $200 more expensive than the highest US price, on sale. Fuck that.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 06, 2011, 03:22:52 pm
content: PetrosA , forget the pricing and enjoy the technological developments , you will feel match better .. :-)
Portable Measurement Equipment of the Year 2010 !!  - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 04, 2011, 05:23:46 am
content: Well there is some one out there who rates products ,and get paid .. tooUse IE to navigate on those links, the Firefox can not load those pages.Portable Measurement Equipment of the Year 2010 !!http://ecmweb.com/product_year/2010/pme_multi_function/ex540-wireless-datalogging-multimeter/Portable Test Equipment of the Year 2010 !!http://ecmweb.com/product_year/2010/portable_test_equipment/dlro10hd-low-resistance-ohmmeter/

author: insurgent
author_rank: Regular Contributor
timestamp: May 04, 2011, 05:31:53 am
content: Sweet Megger tester! I wonder how much that puppy costs? I know some generator service technicians that would be drooling and suffering tumescence over that unit!

author: ElektroQuark
author_rank: Unknown
timestamp: May 04, 2011, 07:59:20 am
content: Quote from: Kiriakos-GR on May 04, 2011, 05:23:46 amNo problem here with Firefox. They load correctly.

author: Zero999
author_rank: Super Contributor
timestamp: May 04, 2011, 04:30:22 pm
content: Check your AdBlock configuration, I use Opera and haven't had any problems.

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 04, 2011, 04:55:11 pm
content: Quote from: Hero999 on May 04, 2011, 04:30:22 pmYep, I had to disable Ad Block Plus to get it to load for me on Firefox 4.

author: lowimpedance
author_rank: Super Contributor
timestamp: May 05, 2011, 01:28:34 am
content: Nice unitsFor those who own an Extech 540 or looking at one , be aware (if not allready) of a product recall on them andsomeother Extech products.Should have been corrected for units made this year.http://www.extech.com/instruments/recall2010.aspCheersJohn

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 06, 2011, 01:59:07 pm
content: Well about the FF , I was able to navigate , but the page had no content .Any way , as soon it does not trouble you , forget about it.About this website , The mystery remains to me , why they do not post details ,about the how-to of their evaluation ?They say its top product , ok , compared to what ?
UL Standard for Electroc Wire. Anybody has a document? - Page 1
Forum section: electronics / general

author: guscrown
author_rank: Regular Contributor
timestamp: May 05, 2011, 09:53:46 pm
content: Recently I have been dealing with cables for a big project I am working on (big company), but I am really new when it comes to UL standards for wires. I am working with a high voltage cable that adheres to the UL 3239 standard.Some of the project leaders worry about insulation for high voltage cables and are requesting we add tubing to the cables, this of course will increase the price of the cables, which we do not want.Does anyone have any information regarding these standard?Also, I have a page of a document that appears to be made by Sumitomo Electric, which includes basically all UL standards for electronic wire and their details. Can anybody share this document with me?

author: qno
author_rank: Frequent Contributor
timestamp: May 06, 2011, 07:20:23 am
content: go to a site of the cable manufacturer.There is usually information about the cables and voltages.Use their advice.Have you tried wiki?

author: PetrosA
author_rank: Frequent Contributor
timestamp: May 06, 2011, 12:04:10 pm
content: UL charges a fee for the definitions sheets. Since the UL definition is a minimum design spec, individual manufacturers may have product spec that exceed the UL rating and I would think that the best option is for the project leaders to define their concerns and submit them in a letter to the manufacturer so you have a documented answer. That would absolve you of liability
Computational Fluid Dynamics and Finite Elements Analysis - Page 1
Forum section: electronics / general

author: s.mosfet
author_rank: Contributor
timestamp: May 02, 2011, 06:17:01 pm
content: I would like to know the main differences between these two method.Particularly, i'm interested in the numerical study of the natural convection with Matlab.Maybe someone can help me...Any help about this particular study is welcome (matlab, which method to use..etc..)Thanks

author: Time
author_rank: Frequent Contributor
timestamp: May 02, 2011, 07:12:15 pm
content: Finite element analysis is simply one method for numerically solving a dynamic fluid system.

author: Zad
author_rank: Super Contributor
timestamp: May 04, 2011, 02:52:04 am
content: I imagine that FEA models are generally rigid, or at least semi-rigid and consist of connected polygons, whereas CFD may well be unconnected (free) particle based.

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 04, 2011, 05:33:20 am
content: each node has parameter of how strong they are connected to adjacent nodes. the lower the parm, less rigid it is hence, more fluid, and will affect the load/force distribution. at least thats what i imagined (half read the book long time ago) but i never got passed that subject. that realm only lies in the software (tool) that the engineers used.last time my discussion with marine eng. friend was that they use Navier-Stoke Equation to solve fluid problem. i guess thats fully pure continuous mathematical system. in order to calculate it numerically, FEA is used... i guess.

author: Time
author_rank: Frequent Contributor
timestamp: May 05, 2011, 02:34:39 pm
content: You can apply the FEA approach to any system governed by partial differential equations. In this case the system is a fluid dynamics system. Depending on the boundary conditions in your system, what you are trying to do might be easily achievable in matlab (analyzing a CFD system with an FEA approach). The really tricky part about the stuff is doing it efficiently and quickly. I think the kicker is your algorithm used for solving and dividing down your polygon matrix.
Intel's 22nm 3d/tri-gate transistor chips. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: May 05, 2011, 09:57:09 pm
content: Intel's 22nm 3d/tri-gate transistor chips.YIkMaQJSyP8

author: scrat
author_rank: Frequent Contributor
timestamp: May 05, 2011, 10:37:45 pm
content: Nice animations...I don't know if it's exactly the same, but I heard about something similar, which was under research, at university, under the name "finFET", referring to the fin channel shape..

author: Sionyn
author_rank: Frequent Contributor
timestamp: May 05, 2011, 11:22:58 pm
content: nicebut in dave land they transistors out of 7 atomshttp://www.physorg.com/news193896845.html
I think I've found a parallel universe 'Dave' - Page 1
Forum section: electronics / general

author: philbx1
author_rank: Regular Contributor
timestamp: May 04, 2011, 10:38:50 am
content: Hi all,I'm still amazed at Dave's great videos, and really appreciate whatever he does.By accident tonight I discovered an Aussie uni (UNSW) lecturer who has a similar giftand thought I might share the name for other Youtube junkies.His name is 'Richard Buckland'.Please do check out some of his stuff if possible.

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 04, 2011, 12:53:28 pm
content: doesnt chalk will cause cancer?

author: FreeThinker
author_rank: Frequent Contributor
timestamp: May 05, 2011, 01:50:08 pm
content: Very competent teacher, getting people involved is 90% of the battle. His Dave Cad needs a little work

author: Ferroto
author_rank: Frequent Contributor
timestamp: May 05, 2011, 02:33:51 pm
content: Quote from: Mechatrommer on May 04, 2011, 12:53:28 pmEverything gives you cancer.
Infrared Rework Stations - Page 1
Forum section: electronics / general

author: divelectservices
author_rank: Contributor
timestamp: May 08, 2011, 02:30:55 am
content: Has anyone used any of the cheap Chinese infrared rework stations such as the T-862, or any other brand?There are several videos on YouTube showing them being used. Do they really work? How do they compare to the traditional hot-air devices?I am skeptical about them, but the price is really compelling if they work.

author: Hypernova
author_rank: Unknown
timestamp: May 08, 2011, 04:38:51 am
content: Here's my 862D+, I had a thread here last year when it first arrived but it seems to have disappeared. I can repost more pic's on the accessories if you want.The silicon sealant on the preheater gives off a toxic smell when it goes over 100C so I don't use it. I took it to the Uni's lab and all the guys liked it, especially when you don't have to try book the SMD lab as the thesis deadline draws near.

author: Psi
author_rank: Super Contributor
timestamp: May 08, 2011, 05:40:15 am
content: you could try running the preheater outside all day, the smell might go away after its been broken in

author: FreeThinker
author_rank: Frequent Contributor
timestamp: May 08, 2011, 01:35:59 pm
content: Quote from: Psi on May 08, 2011, 05:40:15 amI agree. It is more than likely that it is oil or such on the heating element, new electric cooker elements have the same issue when first used ,goes away after 5 mins or so.

author: Hypernova
author_rank: Unknown
timestamp: May 08, 2011, 02:34:06 pm
content: Well, I had it on 180C for an hour when I first got it, while it has reduced some what you can still smell it. And now that I have moved to Taiwan I have yet to unbox the thing and do another burn in (since I got access to a lab at work). I'll get around for full day burn this time once I find a transformer since it isn't 110V compatible.Here's how bad it was when I first got it, you can see the smoke very clearly.

author: FreeThinker
author_rank: Frequent Contributor
timestamp: May 08, 2011, 04:09:49 pm
content: Quote from: FreeThinker on May 08, 2011, 01:35:59 pmHmm! Daft question but you did remove ALL the packing material? Sounds like something getting overly hot. 'Burn in ' should be in the range of a few mins any longer and I would be investigating further.

author: FreeThinker
author_rank: Frequent Contributor
timestamp: May 08, 2011, 04:15:11 pm
content: Looking more closely at the photo and I feel that the white cover on the preheat may be a plastic protection which peels off. Normaly this would be blue but just check that you cannot peel this off, seems strange that it is not a brushed aluminium base.

author: Hypernova
author_rank: Unknown
timestamp: May 08, 2011, 04:36:49 pm
content: Quote from: FreeThinker on May 08, 2011, 04:15:11 pmNope, the ceramic preheater really is like that with a hard shiny finish, I've also once dial up the heat so high that you can use it like those home made SMD hot plates. It's definitely the silicon sealant around the edges. They probably used off the shelf plumber types that wasn't mean to be heated.
Agilent InfiniiVision DSOX2MSO upgrade trouble... - Page 1
Forum section: electronics / general

author: elCap
author_rank: Regular Contributor
timestamp: May 02, 2011, 07:13:21 am
content: Hi all, first post!Today I received my MSO upgrade for my Agilent DSO-X 2014A. The kit includes the probes, license certificate, and a sticker to put on the scope (Saying "MSO Enabled"). To get the license key, you have to go to an Agilent page and enter some information about your scope and they will e-mail you the license file. No problem, easy. But the reply I got said:QuoteWhat the...??!! I had already put on the MSO Enabled sticker and probes were hocked up. I was ready! A bit disappointed, but actually I was not surprised.After about 40 minutes I got another mail with the license file! Great! The file worked but the information in the mail is totally wrong. Here's what it said:QuoteNo information for the new line of InfiniiVision scopes and no information on how to actually enable the license. There is no License soft button on the InfiniiVision under Utiliy-->Option.(to enable the license just put the lic file on an USB stick, plug it in to the scope, locate the file and click on it, a message appears, power cycle the scope, done. Easy)I think Agilent have had plenty of time to fix this (almost 3month since release) and should put higher priority on the upgrade part. After all, it's a major part of the marketing of the scopes and then it should work flawless and be done correctly.This together with the power consumption when off, and some other minor issues with the scope, and the 1272A meter I also have, has dropped my confident in Agilent products. I will think more than twice before investing in more Agilent gear.Sorry, long post. Now I'll do some browsing/window shopping for Fluke and Tektronix products

author: tnt
author_rank: Regular Contributor
timestamp: May 02, 2011, 08:50:33 am
content: Well all of your criticism seems to be about their licensing system ... not about the performance of the item itself.For me, as long as the scope performs well, I don't see much issue if their email texts are a bit ouf of date. It's all in the manual anyway.

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 02, 2011, 09:14:45 am
content: a review of service and support. one of a kind, for a better future,

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 02, 2011, 09:19:52 am
content: So what did Agilent say when you called them?
Porn for engineers - Page 1
Forum section: electronics / general

author: tekfan
author_rank: Frequent Contributor
timestamp: May 01, 2011, 12:49:34 pm
content: You won't regret seeing the whole lot of videos.

author: Psi
author_rank: Super Contributor
timestamp: May 01, 2011, 12:52:21 pm
content: Quote from: tekfan on May 01, 2011, 12:49:34 pmquoted to fix the broken link

author: Sionyn
author_rank: Frequent Contributor
timestamp: May 01, 2011, 12:59:52 pm
content: like much !!!
Need Help! - Page 1
Forum section: electronics / general

author: flyingfrancisco
author_rank: Contributor
timestamp: May 03, 2011, 11:06:47 pm
content: Hello everyoneI just statred to mod my DS1052eE from version 02.05. SP2 and I have hit a wall. I have installed the 02.02. SP2 but can't connect to the scope with UltraScope. When I try to connect it asks me to choose from ASRL1-INSTR or ASRL10-INSTR but either one doesn't work. I get the error "Can't Read from Device" and when I click ok I get "Device not found" I have uninstalled ULtrascope that came with cd and uninstalled "Visa462runtime.exe" reinstalled them and get the same errors. I did not get a request to install drivers. What am I doing wrong.Thx in advance to everyoneflyingfrancisco

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 04, 2011, 02:12:38 am
content: this is the 3rd time i saw this! do you really need to shout 3 times at the same time?
Cheers to Dave for his mention in Circuit Cellar! - Page 1
Forum section: electronics / general

author: krapht
author_rank: Contributor
timestamp: April 27, 2011, 07:41:40 pm
content: His quote is immortal now: "Don't turn it on, take it apart!". Page 30 in CC May 2011, which was released today.

author: EEVblog
author_rank: Unknown
timestamp: April 29, 2011, 10:51:46 am
content: Ooh, I didn't know about that!My sub lapsed just the other month, anyone got a scan?Dave.

author: sacherjj
author_rank: Frequent Contributor
timestamp: April 29, 2011, 02:05:25 pm
content: Bottom Left:

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: April 29, 2011, 03:09:23 pm
content: Well it looks to me, that Dave have an admirer who writes articles on this magazine.Probably he has an name ... so who is it ?

author: Zad
author_rank: Super Contributor
timestamp: April 29, 2011, 05:13:44 pm
content: It seems to be written by Keith Brown of Canada (hello Keith!)

author: sacherjj
author_rank: Frequent Contributor
timestamp: April 29, 2011, 08:25:15 pm
content: Quote from: Mechatrommer on April 29, 2011, 07:13:03 pmCompletely depends on if it requires you to cut or indicate in any way that it was disassembled. At 6 years old, my mom would sit me with a big bowl and a mechanical toy. I took everything apart that I could. I didn't get all of them back together. But I learned how most worked. Knowledge is the point.

author: EEVblog
author_rank: Unknown
timestamp: April 29, 2011, 11:25:55 pm
content: Quote from: Zad on April 29, 2011, 05:13:44 pmHey Keith, if you are here!Dave.
Cheesy Microchip Video - Page 1
Forum section: electronics / general

author: Strube09
author_rank: Regular Contributor
timestamp: April 27, 2011, 05:53:20 pm
content: Not really sure what to think of this video:http://techtrain.microchip.com/mrbytes/Strube

author: FreeThinker
author_rank: Frequent Contributor
timestamp: April 27, 2011, 06:12:33 pm
content: Think *Dilbert*

author: sacherjj
author_rank: Frequent Contributor
timestamp: April 27, 2011, 07:44:07 pm
content: Makes me think I might not be dumb enough to attend.... Maybe they are trying the Dummies book style of recruiting.

author: monpjc
author_rank: Contributor
timestamp: April 27, 2011, 08:00:46 pm
content: Having attended a training centre - I'll guess you will not miss much...!

author: alexwhittemore
author_rank: Frequent Contributor
timestamp: April 28, 2011, 03:38:36 pm
content: It's pretty bad, but at least the production value is good. Also, I canNOT place those accents! Was that their maine office in Arizona? That doesn't sound like any american accent I know.

author: Bored@Work
author_rank: Super Contributor
timestamp: April 28, 2011, 05:19:55 pm
content: Quote from: Strube09 on April 27, 2011, 05:53:20 pmMade by idiots for idiots.

author: Unknown
author_rank: Unknown
timestamp: April 28, 2011, 05:46:12 pm
content: Worst video from MCP must have been the one where they slam an ethernet dev board on a surfboard making retarded sounds and pretending to be excited. It used to be on utube, cant find it now. I remember a comment saying that these things make you look stupid and he was absolutely right.

author: logictom
author_rank: Unknown
timestamp: April 28, 2011, 10:04:06 pm
content: lol spotted this one on youtube the other day, couldn't last the entire video, had to stop it after about a minute.Surely these sort of things just put more people off trying microchip than attract them?
18650 battery holder. - Page 1
Forum section: electronics / general

author: PeterG
author_rank: Frequent Contributor
timestamp: April 28, 2011, 07:13:37 am
content: I have been looking for a single or double cell battery holder for 18650 batteries. I have had no luck finding them so maybe someone here may have seen them around.Regards

author: johnboxall
author_rank: Unknown
timestamp: April 28, 2011, 07:26:12 am
content: eBay -http://bit.ly/lMr4zf

author: PeterG
author_rank: Frequent Contributor
timestamp: April 28, 2011, 10:06:52 am
content: Many thanks for the quick reply tronixstuff.Regards
Relay fpg - Page 1
Forum section: electronics / general

author: House91320
author_rank: Regular Contributor
timestamp: April 25, 2011, 01:00:37 am
content: How funny would it be to make a relay fpga.

author: smackaay
author_rank: Regular Contributor
timestamp: April 25, 2011, 01:08:40 am
content: Yep, that would be pretty funny...

author: tekfan
author_rank: Frequent Contributor
timestamp: April 26, 2011, 12:54:42 pm
content: Guess what this isYou've got to be a bit crazy if you want to build an FPGA out of relaysVery cool though
inductor value in a dc step up converter - Page 1
Forum section: electronics / general

author: marios
author_rank: Contributor
timestamp: April 25, 2011, 03:07:22 pm
content: I built an dc converter and first i used a 47microfarad inductor but then i change it and used a higher value 170microfarad,is it possible to have less input power when i am using a higher value of inductor? but the output power of the converter at the same loading condition to be the same(1.5 W) with both inductors.thanks

author: tnt
author_rank: Regular Contributor
timestamp: April 25, 2011, 03:32:17 pm
content: quick note: Henry ... not Farads

author: marios
author_rank: Contributor
timestamp: April 25, 2011, 03:38:34 pm
content: yes sorry my bad!!! i was in hurry, anywayso what you suggest, is what is happening correct?

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 25, 2011, 05:04:11 pm
content: Quote from: marios on April 25, 2011, 03:07:22 pmYes, if the 47uH was saturating, or the 170uH has lower DC resistance.

author: marios
author_rank: Contributor
timestamp: April 25, 2011, 06:30:40 pm
content: thanks mike, and again sorry for the mistake!!
Fluke 8842A - Page 1
Forum section: electronics / general

author: howieleem
author_rank: Newbie
timestamp: May 03, 2011, 10:14:26 am
content: Hi, i have a Fluke 8842A with an aditional card fitted inside marked, 88$XA-3009A CKT1 Rev B.Is this card the Option 09 card?

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 03, 2011, 10:59:42 am
content: Hi friend ,is your unit operational ?If so why you are not testing the Ohms range , so to find out .The other optional card , looks to be the OPT 05 IEEE Communication Card.But you will get more help if needed , by posting few pictures of it .Take care.
The Spying Apple - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 20, 2011, 03:05:05 pm
content: http://www.guardian.co.uk/technology/2011/apr/20/iphone-tracking-prompts-privacy-fears

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 20, 2011, 04:23:21 pm
content: github repository he compiled it for a mac any other platform you have to compile your self written in objective chttp://petewarden.github.com/iPhoneTracker/

author: Simon
author_rank: Unknown
timestamp: April 22, 2011, 06:59:34 am
content: what apple did and microsoft is notorious for is something I just don't understand. How does it help them ? it only justly inflames the issue of privacy and companies acting like pirates. I would not mind a phone with the functionality but I'd want to enable it at my will and for my own purposes. What just reason apple has to track a user i don't know.I'd also put a halt on these silly long contract and terms. No one will/ has the time to read a 15'000 word contract and to be honest this is more nastiness on these companies parts by creating such insanely large terms and conditions and then burring stuff in there. They should use few words and state the essential. maybe have a short version with key facts in it like: WE WILL STALK YOU !

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: April 22, 2011, 09:33:45 am
content: The contract could still be valid by shortening it to just five words:We pwn you. Suck eggs.

author: Simon
author_rank: Unknown
timestamp: April 22, 2011, 12:54:24 pm
content: yes and if it was shorter people could and would read it. cmon you tell me when was the last time you read right through a long contract like that for a mobile phone and didn't get lost/fed up after 1 paragraph because they were going in circles and dragging it out ?

author: firewalker
author_rank: Super Contributor
timestamp: April 22, 2011, 01:03:32 pm
content: I think that those data are used by Core Location when there is no GPS or WiFi. As I understand it tracks down the cells near th phone. Not the phone actual location.

author: Simon
author_rank: Unknown
timestamp: April 22, 2011, 02:55:03 pm
content: all it needs to do for that is know where it is and seek out known cells etc. or just seek them out. It does not need to log everywhere you go

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 22, 2011, 10:25:59 pm
content: i guess its trivial to find some one emitting rf (square distance thing).
What are these plastic "wings" for on Power adapters? - Page 1
Forum section: electronics / general

author: metalphreak
author_rank: Frequent Contributor
timestamp: April 22, 2011, 05:18:55 pm
content: So I recently bought some wallplug power adapters for various projects, and the ones that came have these funny plastic "wings" on either side. It's really annoying because you can no longer plug two in next to each other on a standard power board or wall socketI can't think of any legitimate reason why. It's not like a 5V 1A adapter is going to get very hot. The only thing I can think of, is that they use a similar fabrication mould for all versions (the size is similar to the chunky UK style plug)Is there some kind of safety regulation that forced them to do this?Pic:

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 22, 2011, 06:29:18 pm
content: My guess is it's to accommodate the full range of international variants, teh UK one being the biggest (and best of course).

author: ziq8tsi
author_rank: Regular Contributor
timestamp: April 22, 2011, 07:43:16 pm
content: It appears to say "100-240V", so they almost certainly make it with various pin configurations. But recessed sockets likeSchukowill need extra or different moulding protrusions anyway, so I am unsure of the benefit of leaving the UK wings on.Still, better than the opposite problem of neglecting the clearance (and fuse) requirements of BS1363...

author: deephaven
author_rank: Frequent Contributor
timestamp: April 22, 2011, 07:54:38 pm
content: Blimey, what's that from?

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 22, 2011, 07:57:28 pm
content: ergonomics?

author: Zero999
author_rank: Super Contributor
timestamp: April 22, 2011, 08:34:34 pm
content: Quote from: mikeselectricstuff on April 22, 2011, 06:29:18 pmYou're right, nothing beats the UK plug for safety and durability. I heard somewhere the EU were talking about standardising to an inferiour German plug but our government wouldn't have it. If they're going to standardise it, the EU should adopt the UK plug but that won't happen because it would be too expensive.

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: April 22, 2011, 09:49:37 pm
content: Quote from: Mechatrommer on April 22, 2011, 07:57:28 pmUp until you step on one in the darkness! OuchI like UK plug - it's large, ugly, bulletproof, traditionally unique and somehow likeable.

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 22, 2011, 10:07:26 pm
content: yes nothing beats good old BS1363

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 22, 2011, 10:43:41 pm
content: Quote from: Leo Bodnar on April 22, 2011, 09:49:37 pmwill be more ouch in the dark as its built with ruggedness in mind. notice the small back footprint of the winged adapter? not just we can easily grab it and the wing protect your finger from reaching the wall plug (electricity?) it also can easily flip if you step on those metal pins, and the chance of it facing upward is lesser if it fall on the floor.