hybridfree/eevblog-posts huggingface dataset:
crazy flebay prices - Page 1
Forum section: electronics / general

author: whitevamp
author_rank: Regular Contributor
timestamp: October 14, 2016, 05:09:39 pm
content: just a small rant.ok so I was looking on the flebay for a Tektronix Fedthru Termination 1W 75 Ohm 011-0055-01, i came across this one for 955.00 and im like that cant be the price, so redid my search and came up with a few more at ~30.00. and he has a 2nd one at 925.00. ohh and the 955 one is the one that came up in a google search.then i was also looking for a Tektronix 015-1001-00 Attenuator 2X 50 Ohms 2W SMA and found this little guy going for 925.00, when there is a few going for ~30.00 once more.all 3 by the same seller. is this person nutz? or just plain stupid? or?/rant off.

author: timgiles
author_rank: Regular Contributor
timestamp: October 14, 2016, 05:40:06 pm
content: Once someone has made a mistake pricing something, there are a lot automated pricing extensions for ebay that pick up on it. They then cause the problem to only get worse. It is similar in effect to various stock market systems... And we all know how good that is for the normals in this world.

author: mariush
author_rank: Super Contributor
timestamp: October 14, 2016, 05:54:34 pm
content: Some raise the price to a ridiculous amount when they're temporarily "out of stock" for a product - the don't want to pay to relist the product and they don't want to lose extra stuff like (20 items left / over 100 sold) which makes the page listing more attractive to some buyers.

author: whitevamp
author_rank: Regular Contributor
timestamp: October 14, 2016, 06:00:14 pm
content: Quote from: mariush on October 14, 2016, 05:54:34 pmohh ok that makes sense.

author: bitseeker
author_rank: Super Contributor
timestamp: October 14, 2016, 11:48:14 pm
content: In addition to the reasons already given, some others may include:Sellers who don't pay monthly for a store cannot put their items on hold when going on vacation (holidays). So, setting an usually high price is one way to temporarily suspend sales. It's still annoying if you have many active items.Some sell other places in addition to eBay (e.g., other sites including their own, utilizing eBay for the transaction handling) and may be able to sell items to their own customers at a higher markup due to additional support, etc. Of course, this wouldn't be a likely explanation for outrageously high prices, but for ones that tend to be on the upper end of the market's spectrum.Not everyone who buys on eBay necessarily does their homework. Some sellers may try to capitalize on such uninformed buyers or ones that may be desperately in need of some item. When all the items at reasonable prices have been sold, all that's left are ones that are unreasonably priced.Of course, some sellers don't do their homework either and list items at their desired price, not what the market is likely to pay.

author: whitevamp
author_rank: Regular Contributor
timestamp: October 15, 2016, 02:29:30 am
content: ok makes sence.
Smart Watch Bluetooth International (U8 Clone?) - Page 1
Forum section: electronics / general

author: edy
author_rank: Super Contributor
timestamp: October 15, 2016, 02:00:19 am
content: Hi folks,Our office received 8 of these cheap "Smart" watches for attending a seminar. They were free, so I'm not complaining, but I am sure it is a fake of the better (but still crappy) U8. For one, the vibration doesn't work although the menus give options for vibration alerts also.I'm not sure if Dave did a teardown or not. Apparently the BT notification app is also suspicious as it sends info to some Chinese server constantly.Given how cheap it is, it would be a wonderful target for some firmware hack that could improve the functions, similar to how Rockbox worked on older iPods and CDHK works on Canon cameras. But given the huge variation I suspect in the hardware of all the fakes it would probably be difficult to pull off.Anyone else have one of these? I've been using it mainly for Bluetooth headset/speaker and dialer, but the microphone sucks and callers say they hear themselves echo. Also, since I don't trust the phone app and it seems you have to go to some unknown Chinese sites to download it (at least for the fakes) I am not using the extra functionality. I have not bothered plugging it into my computer yet... does it mount as a memory device? Will it let me put any files on there (wallpaper, music) or is it just for charging and firmware updates? Also, since I have no idea what fake I have, I will not risk downloading and flashing it, as I've heard bricking it is likely.Otherwise, I'll probably give it to my kids once the novelty wears off. It is not waterproof, looks ugly and big black box, back is already ungluing (no screws), won't show the time unless I press side button... pretty much a piece of crap, but if there was some hack kit for it... that would be cool.I think this looks similar, on eBay only $9:http://www.ebay.com/itm/Bluetooth-Smart-Wrist-Watch-Phone-Mate-For-IOS-Android-iPhone-Samsung-HTC-LG-BD-/282092493040?var=&hash=item41ae05d8f0:m:mJpuP0ClUobUkme5CPyzqmwThe "camera" is a remote trigger for phone camera (no camera in watch), and MP3/music is actually just playing music on phone to the watch (as far as I know, no internal memory or SD card slot visible). It even says in this listing that there is no vibration or altimeter so this looks like it. That is cheap indeed! By the way the battery lasted the whole day/night.
Ugly Year for Tech Layoffs - Page 1
Forum section: electronics / general

author: member_xyz
author_rank: Contributor
timestamp: October 14, 2016, 10:59:52 pm
content: http://spectrum.ieee.org/view-from-the-valley/at-work/tech-careers/analyst-ugly-year-for-tech-layoffs-and-its-going-to-get-worse
Degrading a capacitor - Page 1
Forum section: electronics / general

author: nicedwarf
author_rank: Newbie
timestamp: October 13, 2016, 10:36:50 pm
content: Hi,I would like to increase the ESR of a capacitor to demonstrate performance of a normal/low ESR and high ESR. I'd like to increase the ESR, but not completely destroy it.Any suggestions?Thanks!

author: dannyf
author_rank: Super Contributor
timestamp: October 13, 2016, 11:02:25 pm
content: Put a serial resistor to it.

author: 2N3055
author_rank: Super Contributor
timestamp: October 13, 2016, 11:31:13 pm
content: Quote from: blueskull on October 13, 2016, 11:19:34 pmLOL , but I was..

author: nicedwarf
author_rank: Newbie
timestamp: October 13, 2016, 11:33:53 pm
content: :-) yes, for a few reasons adding a resistor in serial is not ideal in this case.

author: Ian.M
author_rank: Super Contributor
timestamp: October 13, 2016, 11:35:56 pm
content: So tear down some dead SMPSUs or CCFLs and salvage the worst ESR capacitors you can find that haven't actually bulged or blown.

author: DimitriP
author_rank: Super Contributor
timestamp: October 13, 2016, 11:53:20 pm
content: Quote from: Ian.M on October 13, 2016, 11:35:56 pmReplacing the capacitor with a bad one might not be ideal in this case either.....

author: stj
author_rank: Super Contributor
timestamp: October 14, 2016, 12:26:57 am
content: freeze it with spray and watch the readings on a meter.

author: ANTALIFE
author_rank: Frequent Contributor
timestamp: October 14, 2016, 03:33:33 am
content: Call it mean names, i'm sure that will degrade it's spirit ;^)

author: T3sl4co1l
author_rank: Super Contributor
timestamp: October 14, 2016, 06:37:29 am
content: It would help if you told us which kind of capacitor it is............If it's electrolytic, you can simply shoot freeze spray at it. As it gets cold (below 0°C), ESR rises considerably.If it's any other type, add the resistor...(Or if you want to prank someone, put AC across it. Old tech prank: put a 1uF 100V polarized electrolytic inside the equipment end of a power cable. Like an IEC computer power cable, for instance. When your colleague plugs it in, the capacitor wheezes rapidly, and frustration ensues...)Tim

author: fubar.gr
author_rank: Unknown
timestamp: October 14, 2016, 03:51:30 pm
content: I once degraded an electrolytic by applying current limited reverse polarity DC with the intention to increase its ESRYou can see it here:https://youtu.be/AYjnxdvsI1U?t=758A reverse biased electrolytic behaves kinda like a short circuit so it will overheat rapidly and explode.But in this video I am using a current limited power supply. By adjusting the current I can make the temperature rise in a controlled fashion, so the capacitor vents but doesn't explode.But I overdid it and the capacitor ended up with an ESR of over 40 ohms.Also note that this is a very high quality Panasonic FC cap. A cheap capacitor won't hold for that long.
what the hell is going on ? is this normal ? - Page 1
Forum section: electronics / general

author: rob77
author_rank: Super Contributor
timestamp: October 13, 2016, 10:43:46 pm
content: i needed a FPGA chip for a project.. so went to SK farnell shop, picked one according to specs for the project.. the price looked OK-ish to me so ordered 2 of them one for the project and one as spare (just in case).then i was searching some further info (app notes etc... ) and among google results there was a link to UK farnell shop.. clicked it and couldn't believe my eyes ! the exact chip i bought for 38 euro+VAT is sold by farnell in UK for 142pounds ! WTF ?? checked German site of farnell and it's 26 Euro in Germany !!! WTF ??it's a Altera Cyclone IV GX chip - part number EP4CGX30BF14C6N and attaching screenshots with all 3 sites open... it's simply beyond my understanding how could one company have so different pricing for the very same part across countries withing the EU... and it's the same part - same ID and same amount indicated as in stock.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: October 13, 2016, 10:58:29 pm
content: FPGA pricing can be wierd - could be they are subject to pricing agreements in different countries.Findchips shows a price between the 2, but no stock anywhere but FarnellHope you're not designing it into a product....

author: rob77
author_rank: Super Contributor
timestamp: October 13, 2016, 11:16:35 pm
content: Quote from: mikeselectricstuff on October 13, 2016, 10:58:29 pmit's just a one-off , i'm aware that it will be discontinued (or probably already is)that FBGA169 package (1mm pitch) is not mentioned anywhere in the recent datasheets - it's replaced by UBGA169 (0.8mm pitch) so that's a clear indication that at least this very version is obsolete

author: Red Squirrel
author_rank: Super Contributor
timestamp: October 14, 2016, 06:20:36 am
content: I've seen weird stuff like that too like chips on Amazon for like 60 bucks a pop when the same chip on Digikey is like $6.
What kind of watchlist am i on ? - Page 1
Forum section: electronics / general

author: Refrigerator
author_rank: Super Contributor
timestamp: October 13, 2016, 05:27:12 pm
content: So i went to google soundcloud and this happened.https://gyazo.com/35f311b2816a74fcd6344f1830ce15bbWhat ? How ? I had my tracking protection ON, i guess i didn't turn it all the way to 11.Off to Bing, then...

author: rdl
author_rank: Super Contributor
timestamp: October 13, 2016, 05:36:51 pm
content: Their little error message about unusual traffic may just be incorrect. I've gotten similar just because of not letting a site shit their tracking cookies in my computer.

author: Cubdriver
author_rank: Unknown
timestamp: October 14, 2016, 05:17:33 am
content: We won't tell you.And good luck getting off!-Pat

author: Red Squirrel
author_rank: Super Contributor
timestamp: October 14, 2016, 05:57:06 am
content: I use duckduckgo instead of google.
Forbes: crash of 3d robotics - Page 1
Forum section: electronics / general

author: dannyf
author_rank: Super Contributor
timestamp: October 12, 2016, 11:23:39 am
content: A nice article from Forbes:http://www.forbes.com/sites/ryanmac/2016/10/05/3d-robotics-solo-crash-chris-anderson/It tells far more than just drones.

author: coppice
author_rank: Super Contributor
timestamp: October 12, 2016, 11:49:45 am
content: Sounds like they combined sloppy engineering, with an assumption that there would be no serious competitors. Sounds like a recipe for disaster.

author: EmmanuelFaure
author_rank: Regular Contributor
timestamp: October 12, 2016, 02:23:25 pm
content: Quote from: coppice on October 12, 2016, 11:49:45 amIt seems to me that's a perfect definition for "startup".

author: rollatorwieltje
author_rank: Unknown
timestamp: October 12, 2016, 07:21:59 pm
content: I'm so surprised venture capitalists still fall for the same crap every time. Why would you need several hundred people and millions of Dollars to produce something people are making in their own basement?The Pixhawk autopilot they are using has been developed by a tiny team of students. Don't tell me it takes several hundred people to develop a quadcopter... Sure it requires some work to build a robust consumer level airframe, but really... I bet if you gave that Pixhawk team 1 million USD instead of 100 they would have developed the same machine. In 2009 they already had a working quadrotor prototype (I'm visible in one of their award videos, my only online appearance as far as I know).

author: dannyf
author_rank: Super Contributor
timestamp: October 12, 2016, 09:48:44 pm
content: "so surprised venture capitalists still fall for the same crap every time"It is called macro investing: rather than investing in specific winners, you invest in winning (macro) trends.Driven by the fact that picking winners in venture is next to impossible. Instead, find the macro trend and invest in that.

author: Kohanbash
author_rank: Regular Contributor
timestamp: October 13, 2016, 01:22:39 pm
content: Many technologies suffer from this. When they first come out they are unique and investors jump on the technology. However, soon after, the technology becomes commoditized and the price to entry becomes much lower.
Cesium - The most ACTIVE metal on EARTH - Page 1
Forum section: electronics / general

author: DTJ
author_rank: Super Contributor
timestamp: October 14, 2016, 10:10:22 am
content: Not sure why but I figure some here will find this as amusing as I did. The presenter reminded me a bit of the Electoboom bloke but more by accident.

author: dannyf
author_rank: Super Contributor
timestamp: October 14, 2016, 11:30:07 am
content: nice video. reminds me of highschool chemistry classes,
Interesting Equation - Page 1
Forum section: electronics / general

author: Cyberdragon
author_rank: Super Contributor
timestamp: October 11, 2016, 10:00:46 pm
content: One day, way back in high school statistics class, I got so bored I started messing with numbers. After a while I discovered an equation that determines the deviation of a series, that only works for a series with a constant sum. I was wondering if it had a name or whether it had any applications. I originally though it could be used to identify an overload on a system with a single power source (I.E. a central breaker that turns off if the deviation of current for all branches exceeds a threshold). What use that would be IDK.Sorry for horrible notation (I'm on android)EDIT: fixed the notation\[ D = \frac{1}{{x_{avg}}^n} \prod_{i=0}^{N} x_i \]Output: 0 to 1 with lower numbers being higher deviation (or just subtract from one to invert)

author: T3sl4co1l
author_rank: Super Contributor
timestamp: October 12, 2016, 01:50:32 am
content: It's not very clear... can you write that in LaTeX?I think you're saying,\[ D = \frac{1}{{x_{avg}}^n} \prod_{i=0}^{N} x_i \]but not sure.Tim

author: Cyberdragon
author_rank: Super Contributor
timestamp: October 12, 2016, 04:25:36 am
content: Quote from: T3sl4co1l on October 12, 2016, 01:50:32 amYes, like that.

author: Halcyon
author_rank: Unknown
timestamp: October 12, 2016, 04:47:41 am
content: Quote from: T3sl4co1l on October 12, 2016, 01:50:32 amJust out of curiosity, did Internet Explorer always/recently support LaTeX?I've never seen it render equations properly before, although it's rare that I come across them.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: October 12, 2016, 05:00:09 am
content: The forum uses Mathjax to parse equations and to render them. It's a JavaStript library.

author: Cyberdragon
author_rank: Super Contributor
timestamp: October 12, 2016, 11:15:23 pm
content: Quote from: AntiProtonBoy on October 12, 2016, 05:00:09 amI know nothing about text scripts except for the simple  ones, but I copy-pasted the correct version.
Apple Macintosh introduction video - 1984 - Page 1
Forum section: electronics / general

author: rrinker
author_rank: Super Contributor
timestamp: October 12, 2016, 12:41:52 pm
content: Wow, even back then they were full of it. "Apple invented personal computing"?I was in HS then. A friend got one when they were new, so we all went over to his house to check it out. That very first version with just the single floppy was seriously a pain to use, constantly changing the floppy, and literally the ONLY software for it were the built in programs. We were not impressed.
Buying from Mercateo? - Page 1
Forum section: electronics / general

author: nctnico
author_rank: Super Contributor
timestamp: October 12, 2016, 09:23:51 am
content: Does anyone have experience with buying electronics parts from Mercateo? They list a part I need as 'in stock' but I have the feeling they are just a unified store front like Aliexpress and stock levels may not be accurate. Or am I wrong?
Capacitors 1965 US Air Force Training Film  - Page 1
Forum section: electronics / general

author: g.lewarne
author_rank: Regular Contributor
timestamp: October 11, 2016, 04:12:38 pm
content: Aren't Q1 and Q2 exactly the same?

author: System Error Message
author_rank: Frequent Contributor
timestamp: October 12, 2016, 04:18:36 am
content: We have a few hundred farad capacitors now and they're not gigantic, probably the size of what capacitors used to be in those days.The prices of capacitors now vs last time is so depressing.
USB Switches for Samsung TV's USB port  or TV's with multiple USB ports - Page 1
Forum section: electronics / general

author: ez24
author_rank: Super Contributor
timestamp: October 11, 2016, 07:27:21 pm
content: HiI have a lot of hard drives with a lot of videos on them and I would like to connect them all (or a lot) to my Samsung TV that only has one USB port. I bought two USB switch boxes, here is one of them:https://www.amazon.com/gp/product/B00BWF5U0M/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1Neither works, and I figured it is because they are recognized as a USB hub (on a computer) and the Samsung will not recognize USB hubs. Since they have hard switches I did not think they would act like a hub.Does anyone know of a USB switch that is not a USB hub? I think it would not have any electronics, just physical switches. Or would I have to make my own with something like a 4P6T switch like:http://www.newark.com/electroswitch/c4d0406n-a/switch-rotary-4p6t-500ma-125v/dp/06M4597I would use the switch on powered external drives so low power through the switch.Does anyone know of any TVs that have multiple USB ports or any that allow USB hubs? I do not mind physically getting up and flipping a switch.On the Samsung, I can only connect one drive up to 4 tb external drive (no 5 or 6) to the TV and only up to 2 tb portable (because of power)thanks
Electrical installation products and their nonexistent documentation - Page 1
Forum section: electronics / general

author: fubar.gr
author_rank: Unknown
timestamp: October 11, 2016, 01:48:41 pm
content: I wasbitching some time agoabout the poor documentation of some electronic components.But nothing compares to electrical installation components. Some have no datasheet, product sheet or instruction manual at all! Others come with something cryptic like this:www.africa.hager.com/bs/files/download/0/15144_1/0/XP1_EU300_INT_6E6538B.PDFThis is a power relay controller that trips a relay when a 3-phase asymmetry is detected.If I am deciphering the pictogram correctly, the relay is turned off when a phase sags, a phase is lost, or when two phases are swapped. This probably means this controller won't protect against overvoltage.Why couldn't they simply put that in words?
Can not read MMC card - Page 1
Forum section: electronics / general

author: Srbel
author_rank: Frequent Contributor
timestamp: October 11, 2016, 04:43:14 pm
content: I have an old MMC card from my broken Nokia 6600. I want to get phone numbers of it, but no card reader I have tried will read it. Some of them recognise it as 128 MB card, but that is it.I remember that with this phone if you format the card usig computer, phone will not recognize it. If you format it usung the phone, it will work in phone but computer will not recognize it. That was the story back then.Is there any software that can fix this?I do not have any phone to insert this card in.

author: sam1275
author_rank: Frequent Contributor
timestamp: October 11, 2016, 04:52:04 pm
content: Incompatible file system?Try read it on a Linux computer?

author: rstofer
author_rank: Super Contributor
timestamp: October 11, 2016, 05:13:31 pm
content: Definitely try it on a Linux box using the 'dd' command. I read and write filesystems that Linux has never heard of and there is no problem. Blocks are blocks and bytes are bytes. As long as Linux doesn't need to understand any more than that, it's happy to read and write blocks.

author: Srbel
author_rank: Frequent Contributor
timestamp: October 12, 2016, 08:45:18 am
content: I don't know what file system does it use.I have tried on Ubuntu 12.04 and Windows 7.In Linux, it recognises it as 128 MB card, but can't do anything except format it.In Windows, it only asks to insert drive, and nothing can't see it.I don't know how to use that "dd" command. In fact, I do not know how to use any commands in Terminal, other than "sudo-apt-get" and similar. :/

author: bktemp
author_rank: Super Contributor
timestamp: October 12, 2016, 09:00:34 am
content: You could try TestDisk:http://www.cgsecurity.org/wiki/TestDiskIt can detect and read many file systems and PhotoRec can recover files from almost any filesystem, even broken ones.

author: Srbel
author_rank: Frequent Contributor
timestamp: October 12, 2016, 12:05:38 pm
content: Thanks. I will try.
Creepy Clowns - Page 1
Forum section: electronics / general

author: Bryan
author_rank: Frequent Contributor
timestamp: October 10, 2016, 10:20:34 am
content: Maybe it's my age, but I just don't understand why the creepy clown phenomena is such a big deal. Police involved, schools educating kids, people being traumatized. Give me a break is this world getting that stupid that a few "clowns" dressing up as clowns and scaring people is considered a priority. Good lord, even the White House has to address the issue.!!http://globalnews.ca/news/2990008/creepy-clown-sightings-why-the-epidemic-is-spreading-across-canada-and-the-u-s/

author: amyk
author_rank: Super Contributor
timestamp: October 10, 2016, 03:04:45 pm
content: . I blame the decline of circuses.

author: CJay
author_rank: Super Contributor
timestamp: October 10, 2016, 03:08:18 pm
content: If they've that little else to do other than warn of 'creepy clowns' then it seems the world is a better place

author: Refrigerator
author_rank: Super Contributor
timestamp: October 10, 2016, 03:12:40 pm
content: From what i heard one of those clowns got shot dead in the head in USA.

author: zapta
author_rank: Super Contributor
timestamp: October 10, 2016, 05:04:11 pm
content: Quote from: AcHmed99 on October 10, 2016, 04:39:53 pmMy favorite is SA Wardega from Poland. E.g.

author: ez24
author_rank: Super Contributor
timestamp: October 10, 2016, 05:19:17 pm
content: Here in California (Nannie state), I am sure soon it will be a felony to have clown paraphernalia.
The mechanical side of electrical engineering - A microwave differential probe - Page 1
Forum section: electronics / general

author: Jeff_Birt
author_rank: Regular Contributor
timestamp: October 10, 2016, 08:22:39 pm
content: I was not sure if there would be any interest in this sort of thing, but I did taken some pictures today just in case.This week I'm building a microwave differential probe. It is based on one that I built about a year ago, the same frequency (waveguide size) but different spacing. The original probe was only two pieces, a top cover and a base which had the wave guide milled into it. Then the lab on campus it was made for needed one for a higher frequency which meant the alignment of the splitter to the flanges was more critical. The splitter is a small cube that sets in between the two flanges (upper rear of image). Typically it will have two alignment pins to align it to the flanges. For the lower frequency probe will did without the pins, this would not work on the higher frequency design.The folks at the amntl lab (http://amntl.mst.edu/) then asked if the probe design could be split so it could come apart in two halves. This meant four pieces and more critical alignment! The first split design came out OK, it was usable but it took some effort to hand finish things. I'm hoping this one comes out a little better.The attached image is a rendering of the 3D model I did. The flanges for mounting the splitter are in the upper rear. The two wave guides you see at the front is the business end of the probe. The two rectangular blocks on the legs are just places for mounting the probe.Like I said I'm not sure if this is of any interest on this forum. If so let me know and I'll post some pictures of the covers (two pieces on bottom of image) that I made today. Tomorrow I'll start machining the bases (the two parts with the waveguide slots.) Also, check out the videos form the amntl link above. They so some really cool stuff.
This Is Mission Control - 1960's & 70's NASA Apollo Program - Page 1
Forum section: electronics / general

author: rdl
author_rank: Super Contributor
timestamp: October 09, 2016, 09:58:26 pm
content: "Failure Is Not An Option" is also good. It's somewhat based on the autobiography of Gene Kranz.

author: Tomorokoshi
author_rank: Super Contributor
timestamp: October 10, 2016, 03:09:11 am
content: That's pretty hep background music!
Want to buy 10 PCB's for popular ebay "red" PSU 0-30V 3A - Page 1
Forum section: electronics / general

author: Cliff Matthews
author_rank: Unknown
timestamp: October 07, 2016, 01:40:16 am
content: I tried searching eBay for just the PCB and no luck finding this one:http://www.ebay.com/itm/Red-0-30V-2mA-3A-Continuously-Adjustable-PCB-DC-Regulated-Power-Supply-DIY-Kits-/371597449591?hash=item5684ef1977:g:GkQAAOSwiylXCvvBSurely this must be a popular design? EasyEDA.com doesn't have it listed either. Can anyone point me in the right direction?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: October 07, 2016, 02:16:41 am
content: I dunno, ask the seller?

author: JoeN
author_rank: Frequent Contributor
timestamp: October 07, 2016, 02:34:27 am
content: Quote from: Cliff Matthews on October 07, 2016, 01:40:16 amDo you already have the parts and want to save like three or four dollars, do you want to clone it, or what? It looks like it would be only too easy to buy the kit and clone it if you wanted to. There is no obfuscation or even any marks to indicate someone thinks it is a proprietary design.

author: Marinated
author_rank: Contributor
timestamp: October 07, 2016, 04:14:12 am
content: It is a popular though not great design. Prepare to tinker if you want good performance across the claimed range. There is plenty of information about the design, originally from electronics-lab.com I believe, for example:http://www.paulvdiyblogs.net/2015/05/tuning-030v-dc-with-03a-psu-diy-kit.html

author: ebclr
author_rank: Super Contributor
timestamp: October 07, 2016, 08:33:05 am
content: Here is cheaperBuy the kit and trow the componentshttps://www.aliexpress.com/item/Factory-Free-Shipping-0-30V-2mA-3A-Adjustable-DC-Regulated-Power-Supply-DIY-Kit-Short-Circuit/32736070898.html?spm=2114.01010208.3.402.XzFN6r&ws_ab_test=searchweb0_0,searchweb201602_3_10056_10065_10055_10068_10054_10069_10059_10073_10017_10070_10060_10061_10052_10062_10053_10050_10051,searchweb201603_6&btsid=6a801f2f-f66f-4500-af34-7165d11470db

author: Cliff Matthews
author_rank: Unknown
timestamp: October 10, 2016, 01:33:23 am
content: Quote from: Marinated on October 07, 2016, 04:14:12 amThanks, I'll check with the author later (after reading all) maybe he has Gerber files employing his mods. I plan to go this route since I want to build as many as 12 supplies. I have have the transformers and 70% of the parts.
Mega Projects: chinese high speed rail system - Page 1
Forum section: electronics / general

author: dannyf
author_rank: Super Contributor
timestamp: October 08, 2016, 11:45:09 pm
content: I took a ride on the high speed trains from Shanghai to HangZou a couple years back. Absolutely amazed by that experience - not just the trains themselves but the whole system.the video below is a much more comprehensive view of the entire chinese rail system. it gives you a lot better understanding of what is behind those trains.unfortunately, it is in chinese but the pictures are still the same,40 minutes into the program, there was a factory that makes IGBTs, and then a wireless datalink / coupler that synchronizes two trains.As I live in a 3rd world country, I drool over those trains,

author: Marco
author_rank: Super Contributor
timestamp: October 09, 2016, 02:43:22 am
content: Central planning can make some nice infrastructure.Wonder when/if it will ever be profitable though.

author: EmmanuelFaure
author_rank: Regular Contributor
timestamp: October 09, 2016, 02:27:32 pm
content: Gorgeous!Living in the "TGV" country, I'm ashamed.
good webcam for around $15 - Page 1
Forum section: electronics / general

author: sonicwang
author_rank: Contributor
timestamp: October 08, 2016, 09:28:22 am
content: my $2 webcam is not so good as you can see in the video please check itmy friend got a webcam off ebay brand new for $11 and the video looks amazing but i can't find it for sale nowi don't need good i just need one where the video is not blurry anything will do

author: sonicwang
author_rank: Contributor
timestamp: October 08, 2016, 09:58:45 am
content: bump need to know asap as im going away in just over a month and need it to come before a go away so i can take video on my laptop

author: ZeTeX
author_rank: Frequent Contributor
timestamp: October 08, 2016, 10:33:18 am
content: Quote from: sonicwang on October 08, 2016, 09:28:22 amThis one is pretty good:https://www.amazon.com/dp/B005BZNEKM/ref=asc_df_B005BZNEKM4560689/?tag=hawk-future-20&creative=394997&creativeASIN=B005BZNEKM&linkCode=df0&ascsubtag=hawk-1116501323-20720p..

author: sonicwang
author_rank: Contributor
timestamp: October 08, 2016, 10:48:06 am
content: Quote from: ZeTeX on October 08, 2016, 10:33:18 amit is out of my price is this camera any goodhttp://www.everbuying.net/product1124252.htmlwill this be good

author: Brumby
author_rank: Unknown
timestamp: October 08, 2016, 10:49:42 am
content: My first question is - when was the lens cleaned last?

author: sonicwang
author_rank: Contributor
timestamp: October 08, 2016, 10:56:36 am
content: Quote from: Brumby on October 08, 2016, 10:49:42 amnever

author: kolbep
author_rank: Frequent Contributor
timestamp: October 08, 2016, 11:30:16 am
content: Some webcams have the Focus adjustable.You need to turn the front of the lens until it is in focus.Also, for the webcams to work properly, you need a LOT of light. If you do not give it lots or light, then the picture will be grainy, and the framerate drops down.

author: sonicwang
author_rank: Contributor
timestamp: October 09, 2016, 04:08:37 am
content: ok thx

author: Brumby
author_rank: Unknown
timestamp: October 09, 2016, 04:35:55 am
content: Quote from: wilfred on October 08, 2016, 11:09:40 amTo me, it definitely looks like there's a film ofsomethingon the lens....Is there a cigarette smoker around? Is it a dusty environment? I'd suggest try giving the lens a clean before spending money.

author: Halcyon
author_rank: Unknown
timestamp: October 09, 2016, 05:27:40 am
content: After exhausting all the suggestions already mentioned above (focusing, cleaning the lens etc...) may I suggest perhaps a second hand Logitech camera off ebay? You can get some good buys out there for basic cameras. Just make sure to do your homework first and ensure you can still download drivers for your operating system. Some of the old Logitech cameras have no drivers available past Windows 9x or XP.If you're just recording short ad-hoc videos like the one in the OP, could you just use your mobile phone in a mount or holder?
Oil "cooled" pc setup - Page 1
Forum section: electronics / general

author: ZeTeX
author_rank: Frequent Contributor
timestamp: October 04, 2016, 07:11:32 pm
content: this is fake doe there is a heater under the oil, look at picture 4

author: bitslice
author_rank: Frequent Contributor
timestamp: October 04, 2016, 08:45:31 pm
content: Israel has papers in English?

author: jonovid
author_rank: Super Contributor
timestamp: October 04, 2016, 08:57:23 pm
content: Cooling for my next power supply project....... maybe not! everything is somehow food related nowadays

author: elgonzo
author_rank: Unknown
timestamp: October 04, 2016, 09:00:44 pm
content: Quote from: bitslice on October 04, 2016, 08:45:31 pmPerhaps. But Isreal certainly has Internet. Even four years ago:(the original photos are in all likelihood much older than 4 years, given the Pentium II system and all the CRTs)Still makes me chuckle and hungry, though

author: retrolefty
author_rank: Super Contributor
timestamp: October 05, 2016, 01:07:51 am
content: Must be running Linux.

author: TerraHertz
author_rank: Super Contributor
timestamp: October 06, 2016, 08:04:08 am
content: It's an Intel Slot-1 Pentium antique. Which absolutely does not produce that much heat. Also note the boiling oil is up at the end, away from the motherboard.My guess is he has a hotplate under that end of the tray, and the post is another example of 9gagdeceptionlolz. (Where it appeared before here.)I hope he likes his potato chips with a brew of PVC plasticizers and fiberglass impurities.

author: mcinque
author_rank: Unknown
timestamp: October 06, 2016, 11:53:11 am
content: Totally agree with TerraHertz.

author: ZeTeX
author_rank: Frequent Contributor
timestamp: October 06, 2016, 01:38:46 pm
content: Quote from: TerraHertz on October 06, 2016, 08:04:08 amQuote from: mcinque on October 06, 2016, 11:53:11 amOf course this is fake, I think in picture 4 you can see something under the plate.also to get cooking with oil you need to get it at least 140C-130C and not any electronics in the PC can get this hot before shutdown.

author: bitslice
author_rank: Frequent Contributor
timestamp: October 06, 2016, 05:12:00 pm
content: Quote from: ZeTeX on October 06, 2016, 01:38:46 pmWhy are you posting it then?

author: ZeTeX
author_rank: Frequent Contributor
timestamp: October 07, 2016, 09:43:36 am
content: Quote from: bitslice on October 06, 2016, 05:12:00 pmBecause it's funny?

author: bitslice
author_rank: Frequent Contributor
timestamp: October 07, 2016, 09:59:24 pm
content: Quote from: ZeTeX on October 07, 2016, 09:43:36 amback in the 80's maybe?
Has Tektronix stopped sending EEVBLOG equipment to review? - Page 1
Forum section: electronics / general

author: diyaudio
author_rank: Frequent Contributor
timestamp: October 07, 2016, 07:37:41 pm
content: Question:I noticed Tektronix stopped sending Dave equipment to review for a while now, is this because Dave gave a 100% no bullshit review on the MDO 4000?

author: PA0PBZ
author_rank: Super Contributor
timestamp: October 07, 2016, 07:52:09 pm
content: Do they have anything new to review?

author: diyaudio
author_rank: Frequent Contributor
timestamp: October 07, 2016, 07:57:49 pm
content: Quote from: PA0PBZ on October 07, 2016, 07:52:09 pmTektronix spectrum analyzer rsaXXX, Tektronix TBS2000...

author: EEVblog
author_rank: Unknown
timestamp: October 07, 2016, 09:31:14 pm
content: I don't have anything new from them and they have not approached me. They continue to advertise on the blog though.

author: nctnico
author_rank: Super Contributor
timestamp: October 07, 2016, 10:30:33 pm
content: Quote from: PA0PBZ on October 07, 2016, 07:52:09 pmThey have lots of other gear like signal generators, multimeters, etc.
What are the factors limiting scaling cmos? - Page 1
Forum section: electronics / general

author: Karamel
author_rank: Regular Contributor
timestamp: October 07, 2016, 02:05:55 pm
content: Hi everone,I have read something, some information are not about nowadays but some are currently and nice, about the topic on internet but I am really wondering your views.Economic? Technology? Meterial? Which one or which are they cause this problem?Best Regards,Karamel

author: Wimberleytech
author_rank: Super Contributor
timestamp: October 07, 2016, 03:21:23 pm
content: All of the above.

author: rfeecs
author_rank: Frequent Contributor
timestamp: October 07, 2016, 04:38:17 pm
content: http://arstechnica.com/information-technology/2016/02/moores-law-really-is-dead-this-time/Basic physics? The wavelength of light for photolithography , the size of an atom relative to the gate size?For economics, consider Rock's law:https://en.wikipedia.org/wiki/Rock%27s_lawQuote
Dave's Other Website - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: November 03, 2009, 05:12:00 am
content: [Just in case, like me, you weren't aware of this]In trying figure out exactly WHAT a uCurrent adapter is, I happened upon Dave's Other Website--www.alternatezone.comSee the "Electronics" section to see stuff most relevant to EEVblog viewers.Did you know that Dave actually wrote a book on Internet dating?-- and apparently it WORKS-- checkout the pictures of his wife-- what a babe!Interestingly enough, Dave built a hobbyist-grade frequency generator for Silicon Chip Magazine (AU) some time ago. Unfortunately the kits are no longer for sale. WHAT a BUMMER-- I seem to be in the market for such a device, now!

author: EEVblog
author_rank: Unknown
timestamp: November 07, 2009, 05:09:25 am
content: Quote from: TrentO on November 03, 2009, 05:12:00 amWell, she is Wonder Woman after all:Dave.

author: Unknown
author_rank: Unknown
timestamp: November 07, 2009, 05:46:00 am
content: Holy smokes!

author: Unknown
author_rank: Unknown
timestamp: November 07, 2009, 05:48:27 am
content: Ah yes... but notice that Wonder Woman, like all chicks, is terrible with navigation.

author: qno
author_rank: Frequent Contributor
timestamp: November 13, 2009, 12:59:31 pm
content: Mmmmm...a little girl would be nice.......

author: Unknown
author_rank: Unknown
timestamp: December 11, 2009, 09:03:08 am
content: awesome i didn't know the other page...

author: sonicwang
author_rank: Contributor
timestamp: October 09, 2016, 04:12:02 am
content: Quote from: TrentO on November 07, 2009, 05:48:27 amlol

author: calexanian
author_rank: Super Contributor
timestamp: October 09, 2016, 05:41:49 am
content: Wait wait wait. We are all missing the most important point of the whole thing..this picture.Dave. Story please....

author: timb
author_rank: Super Contributor
timestamp: October 09, 2016, 06:02:20 am
content: Quote from: qno on November 13, 2009, 12:59:31 pmI don't think his Internet Dating book is targeted at pedophiles...

author: Halcyon
author_rank: Unknown
timestamp: October 09, 2016, 06:33:49 am
content: Ah gotta love 90's fashion ;-)

author: iampoor
author_rank: Frequent Contributor
timestamp: October 09, 2016, 08:17:53 am
content: Quote from: sonicwang on October 09, 2016, 04:12:02 am....bumping a 7 year old thread?And sorry your not at my Mom's house.

author: Unknown
author_rank: Unknown
timestamp: October 10, 2016, 01:20:05 am
content: Dave better keep his wife out of sight of "the Donald". (Trump that is....)

author: NivagSwerdna
author_rank: Super Contributor
timestamp: October 11, 2016, 12:25:14 pm
content: Quote from: TrentO on November 03, 2009, 05:12:00 amFlynn eat your heart out. In like Dave!
High tech way to reduce EMF radiation - Page 1
Forum section: electronics / general

author: joeqsmith
author_rank: Super Contributor
timestamp: October 06, 2016, 12:43:24 am
content: 139 sold! That's more meters than Dave has sold on Amazon.Some of the reviews are pretty good.https://www.amazon.com/Aulterra-Radiation-Neutralizing-Whole-House/dp/B00DNIIETK/ref=sr_1_43?ie=UTF8&qid=1475714351&sr=8-43&keywords=gauss+meter

author: System Error Message
author_rank: Frequent Contributor
timestamp: October 06, 2016, 01:15:40 am
content: One of the 5 star comments:"5.0 out of 5 stars Everything has its use..ByDarkpassengeron August 22, 2015Doesn't do squat for EMF, but it DOES take money out of the hands of idiots who might otherwise do something truly dangerous with it."

author: lowimpedance
author_rank: Super Contributor
timestamp: October 06, 2016, 01:46:08 am
content: , Well that description was as clear as 'mud'..Quote from: System Error Message on October 06, 2016, 01:15:40 amOh yes ......how true . soto that.

author: joeqsmith
author_rank: Super Contributor
timestamp: October 06, 2016, 02:51:08 am
content: I take it you saw the mud!QuoteIn other words, after four years of college, flunked out, didn't learn a thing and now living in mom's basement playing WOW and writing Amazon reviews!

author: Red Squirrel
author_rank: Super Contributor
timestamp: October 06, 2016, 09:52:18 am
content: Someone needs to do a tear down of one just to see what is in it, if anything.I wonder how it's even legal to sell stuff like this, it's basically a scam.

author: StillTrying
author_rank: Super Contributor
timestamp: October 06, 2016, 01:42:42 pm
content: Here's another one.https://www.amazon.com/eLink-EMF-Neutralizer-Protection-Device/dp/B00TRM0UI4Moondream EMF Radiation Curtain Lininghttps://www.amazon.com/dp/B018EMIH4QElectro Deflecto Unisex "Tin" Foil Hat One Sizehttps://www.amazon.com/Electro-Deflecto-Unisex-Foil-Size/dp/B01I497JAM

author: Red Squirrel
author_rank: Super Contributor
timestamp: October 06, 2016, 11:43:08 pm
content: Hmmm there seems to be a market for these. It's always tempting to make up stupid devices like this knowing they'll actually sell, but I have morals so I'd never do that.

author: batteksystem
author_rank: Regular Contributor
timestamp: October 07, 2016, 04:22:55 am
content: I am sure that it works, it will occupy a socket space, so less electrical appliance can be connected to the socket, which mean less EMF in theory comparing to fully populated sockets.
For all Nixie fans... This looks GOOD! - Page 1
Forum section: electronics / general

author: bktemp
author_rank: Super Contributor
timestamp: October 06, 2016, 09:22:54 am
content: https://www.eevblog.com/forum/chat/video-the-art-of-making-a-nixie-tube/

author: ElektroQuark
author_rank: Unknown
timestamp: October 06, 2016, 12:37:05 pm
content: Art of artisan. Love it.

author: ebclr
author_rank: Super Contributor
timestamp: October 07, 2016, 04:13:00 am
content: It's really beauty.But why,I can't understand that heavy investing on producing something death 30 years ago, without any technological advantage on the old product, What justify all that money invested in this production ?

author: Cyberdragon
author_rank: Super Contributor
timestamp: October 07, 2016, 04:33:37 am
content: Quote from: ebclr on October 07, 2016, 04:13:00 amSACRELIGE!Why do you think people spend millions repairing paintings centuries old? TUBES ARE ART!

author: ebclr
author_rank: Super Contributor
timestamp: October 07, 2016, 08:36:15 am
content: Sorry, i guess I'm in the wrong Forum , I suppose to be on engineering forum, not on a Art one. But as art material the production is really nice, but it's a copy not original
When something fails just after you make a change but it wasn't caused by the ch - Page 1
Forum section: electronics / general

author: raptor1956
author_rank: Frequent Contributor
timestamp: October 05, 2016, 07:35:00 am
content: I did a small modification to my main desktop PC that I use for image and video editing -- I added a couple more fans and a Gelid fan controller. The Gelid unit messed up a couple fans I had as the LED's in them no longer work and they don't work when plugged into the original power connectors or an external PS. And, just about the same time as that my PC began to act real strange with the PC freezing with the mouse and keyboard inoperative. Once in a while unplugging the mouse/KB wifi dongle then plugging it into another USB port would bring it back to life but often for only a few seconds.So, I undid the modification -- no help. I then began to isolate things by disconnecting the external sound amplifier, and then both storage HD's -- again, no help. I had Task Manager up and noticed that the main boot/OS drive, drive C:, which is a PCIe SSD and very fast, was sitting around 70-99% and for extended periods of time. Out of desperation I went to the Samsung website and downloaded the NVME driver, installed it with Windows 10 first saying I already had it installed do I want to continue -- I did. Well, long story short, my PC is now 15+hours without an incident so it looks like the NVME driver got hosed somehow and I can't for the life of me figure out how anything I may have done during the modification to add a couple fans and a fan controller could have hosed the NVME driver.The moral of the story, I think, is that if you make a change and something breaks right afterwards it's natural to think the change must have been responsible, but that is not always the case...Brian

author: ConKbot
author_rank: Super Contributor
timestamp: October 05, 2016, 07:13:20 pm
content: I once installed the student version of autocad. right after it wrapped up, system black screens and my D: drive is gone, disk totally failed."Well, pirated version of autocad never do that... Hmm"

author: raptor1956
author_rank: Frequent Contributor
timestamp: October 05, 2016, 08:48:55 pm
content: Quote from: ConKbot on October 05, 2016, 07:13:20 pmYeah, depending on the source of the student version of AutoCAD it could have been crashware designed to kill your PC. The stuff circulating on college campuses would make a virologist puke!Brian
ribbon cable pitch - Page 1
Forum section: electronics / general

author: EEVaditya
author_rank: Regular Contributor
timestamp: September 28, 2016, 07:16:29 am
content: Hello,What would be the appropriate Flat ribbon cable pitch for 10 pin (2x5) Female Socket/Connector having pitch 1.27mm.Want to make IDC Cable with 10 pin 2x5 1.27mm pitch Female socket/connector at both ends which can connect Male 10 pin 2x5 1.27mm Box header .

author: sleemanj
author_rank: Super Contributor
timestamp: September 28, 2016, 08:46:42 am
content: For 1.27mm pitch 2 row header, the wire is 0.635mm pitch by necessity.

author: ebclr
author_rank: Super Contributor
timestamp: September 29, 2016, 01:42:49 am
content: Cable readyhttps://world.taobao.com/item/37877390657.htm?spm=a312a.7700714.0.0.S41HIw#detail

author: EEVaditya
author_rank: Regular Contributor
timestamp: October 05, 2016, 02:50:26 pm
content: Also, how much the ribbon cable core matters?and for above said specification what should be the core?