hybridfree/eevblog-posts huggingface dataset:
EEVblog #515 - Battery Ionic Resistance Investigation  - Page 1
Forum section: electronics / general

author: hugocoolens
author_rank: Newbie
timestamp: August 20, 2015, 09:12:07 pm
content: Hi Dave,I saw your #515 EEVBLOG, very interesting video. Do you have experience with those "Internal Battery Resistance Impedance Meter Testers" which you can buy from chinese websites e.g. Aliexpress. What exactly do they measure and are they trustworthy and useful? Maybe you could do a tear down of one those? kind regards,hugo

author: EEVblog
author_rank: Unknown
timestamp: August 20, 2015, 10:34:14 pm
content: They just load down the battery.Real ones would test at 1kHz.
Earth - Page 1
Forum section: electronics / general

author: PsychoMaster
author_rank: Regular Contributor
timestamp: May 16, 2015, 08:29:49 pm
content: Hi AllEasy doing your earth isn't it? well not when one half your chip is linear and doesn't want tying to it's digital half or you'll get horrible distortion on it's output.How about a lesson on doing various earth techniques please.

author: miguelvp
author_rank: Super Contributor
timestamp: May 16, 2015, 09:15:37 pm
content: I think Dave touched a bit on that on EEVblog #738 - Yamaha DME32 Digital Mixer Teardown @12 minutes:I think he also goes a bit more in detail on other instances. Edit: like at 32minutes towards the end.Also check out this video that explains Shared Return Paths specially when you have both digital and analog components:I agree that a video by Dave explaining this would be a nice addition, maybe not a blab but a fundamental Friday kind of video.

author: PsychoMaster
author_rank: Regular Contributor
timestamp: May 20, 2015, 07:14:09 pm
content: Thanks Friend!

author: babysitter
author_rank: Frequent Contributor
timestamp: May 21, 2015, 05:16:20 am
content: Oh yeah, ground/earth this is a cheap whore which is working world-wide.She is working at the same conditions no matter who you are but you have to take care of some things to get optimum performance from her.

author: Skimask
author_rank: Super Contributor
timestamp: May 27, 2015, 05:02:12 am
content: What is the sheet resistance of the earth?

author: JazzHarper
author_rank: Contributor
timestamp: August 12, 2015, 08:27:20 pm
content: Quote from: Skimask on May 27, 2015, 05:02:12 amSimple question, difficult answer:http://www.weschler.com/_upload/sitepdfs/techref/gettingdowntoearth.pdf
Forum editor problems... - Page 1
Forum section: electronics / general

author: westfw
author_rank: Super Contributor
timestamp: August 06, 2015, 12:27:41 am
content: How come I don't get the various forum reply edit buttons when I'm using firefox (39.0) on my Mac (10.9.5)? they show up fine in, say, Chrome (firefox first, then chrome.):

author: Andy Watson
author_rank: Super Contributor
timestamp: August 06, 2015, 12:49:16 am
content: I get the same effect if I disable scipts in firefox.Perhaps you need to addwww.eevblog.comto a white-list for firefox ?

author: westfw
author_rank: Super Contributor
timestamp: August 06, 2015, 06:28:32 am
content: Ah hah! Adding to NoScript's white list fixed the problem. I was used to getting warnings from it whenever it stopped something; I guess I'll have to keep this in mind!Thanks!
X-Carve Live Build 4 -> Re Terminal Blocks vs Stranded wire - Page 1
Forum section: electronics / general

author: Asmyldof
author_rank: Regular Contributor
timestamp: August 04, 2015, 01:10:59 pm
content: Dear Dave2 / SpareDave / DaveBackup,You mention here:https://youtu.be/jUtzoO-ur34?t=37m23sThat you hate terminal blocks, specifically with stranded wire. I partly agree with you on your rantings. There are great types of terminal blocks that are great for applications such as the CNC machine (less bending/vibration tension, compared to solder joints), especially if you need to pull wires through somewhere and you don't expect the builder to have crimping tools for connectors. Such blocks would be the type that pull the metal block up on the screw, or quick-insertion/easy-release blocks without screws.But since nobody else seems to use those any more (because $0,02 difference) I can only tell you, get these for the lab, it'll make you much happier in the long run using other people's designs (or cheaper alternatives, but Knipex is the bomb):http://uk.farnell.com/knipex/97-53-14/crimp-tool-for-cable-ferrules/dp/4135520http://uk.farnell.com/multicomp/e1508-red/ferrule-16awg-14mm-nylon-red/dp/9972307http://uk.farnell.com/multicomp/e0508-white/ferrule-22awg-14mm-nylon-white/dp/9972218http://uk.farnell.com/multicomp/e2518-grey/ferrule-14awg-24mm-nylon-grey/dp/9972650http://uk.farnell.com/multicomp/e1008-l-red/ferrule-18awg-14-5mm-nylon-red/dp/9972226http://uk.farnell.com/multicomp/e7508-l-white/ferrule-20awg-14-5mm-nylon-white/dp/9972285(I posted Farnell links, but the stuff is available everywhere, really. Though the multicomp ferrules for their price hold up better than I expected)They're actually mandatory in some areas of installation tech over here, since soldered connections or single core wires are very unreliable in vibrating connections (such as CNC machines might beand generators and such certainly are)

author: Monkeh
author_rank: Super Contributor
timestamp: August 04, 2015, 01:13:45 pm
content: Ferrules are the correct solution to stranded wire in most screw terminals, indeed.Cage clamp (screwless) terminals also work well, and rising clamp is quite suited to larger fine stranded wires.
X-Carve Part 3 RE: BK Precision 8500 Software - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: July 30, 2015, 11:27:45 pm
content: RE: BK Precision 8500 Software.If EEVBlog would like help to create the software for this let me know. It might also come in handy later. I've got the manual open. Even though it's a packet it looks fast for me to spin this out. The checksum appears just a simple modulus sum.Requirements:1) Windows OS2) I'm assuming you installed the USB driver.What I understand from the video is you'll like constant power (W) and also log it to a file. I would build it in C++ and provide you the source code and application. It would log to a comma delimited output file which would be easily imported to open office or excel.I'd love to help you. No $ required will do it pro-bono. Don't even have to mention my name.

author: HKJ
author_rank: Super Contributor
timestamp: July 31, 2015, 05:46:44 pm
content: I do not understand the problem with interfacing to the 8500. The manual describes the protocol and it works exactly as described.I have been using some 8500 for battery test for a few years and the communication is very stable, usual I only have a problem about two times a year and it is probably windows that is the problem.But low power load may not be as precise, the load do use some current for its measuring circuit. I have never bothered with measuring how much, but just stayed at 0.1A and above for my loads and using some other equipment when I need test at lower currents.

author: nitro2k01
author_rank: Frequent Contributor
timestamp: August 01, 2015, 12:26:37 am
content: I could also do this (though my preferred language would be Python). I would have to do it blind, since I don't have a BK Precision meter, though that shouldn't be a major problem if someone can test the code.

author: lapm
author_rank: Frequent Contributor
timestamp: August 01, 2015, 02:24:03 am
content: Problem is that both Dave's are not software people, one is electronics engineer and other is still training to be one i believe..For software programming person i'm sure this would not be big deal.In fact after reading the manual, any software person should have no problem implementing software to do stuff... Protocol is so simple... Even if its not ASCII for Dave's liking..
CloudFlare hickups this morning - Page 1
Forum section: electronics / general

author: jancumps
author_rank: Unknown
timestamp: August 01, 2015, 07:05:56 am
content: I had a few CloudFlare error pages just a few minutes ago. I hadn't seen this for a while.All is back to normal now, a few minutes later.It's the typical error page showing that my connection with CloudFlare is ok, but that it gets timeouts from eevblog.com
That Antenna - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: July 26, 2015, 02:46:27 pm
content: Sorry Dave but I don't do Twitter. The antenna you spotted is a ham radio antenna and it probably operates on all bands from 10m to 40m. They have various names and the following links give you some idea of the possibilities:http://www.dj0ip.de/wire-beams/wire-beam-types/http://www.scribd.com/doc/19452380/VK2ABQ-Beam-20m-15m-10mMy guess is a VK2ABQ Antenna but I could be wrong.

author: Tothwolf
author_rank: Regular Contributor
timestamp: July 31, 2015, 02:57:57 pm
content: https://twitter.com/eevblog/status/625190862754938880https://twitter.com/eevblog/status/625195496236134400My first thoughts were that might be a multi-band shortwave reception antenna. That antenna's elements look like they are complete loops compared to the VK2ABQ design which uses two insulators per wire loop to turn half of it into a reflector.http://homepage.ntlworld.com/m1bhp2/vk2abq.htmlAfter looking at other designs, even though I can't make out any insulators in the photos, I have to agree with some of the other responses that it looks more like a G3TXQ CobWeb or G3TPW CobWebb style antenna.
Live Stream - Page 1
Forum section: electronics / general

author: MyCo
author_rank: Contributor
timestamp: July 23, 2015, 05:04:55 am
content: FYI: That's all I can see... and probably most other Germans as well...

author: Wytnucls
author_rank: Super Contributor
timestamp: July 23, 2015, 05:24:33 am
content: I get the video, but my comments are banned.

author: ProBang2
author_rank: Frequent Contributor
timestamp: July 23, 2015, 06:28:08 am
content: Quote from: MyCo on July 23, 2015, 05:04:55 amIf you are using Firefox, then it is very useful to install this:http://www.unblocker.yt/de/youtube-unblocker-firefox/#install

author: MyCo
author_rank: Contributor
timestamp: July 23, 2015, 06:40:25 am
content: Wholy crap... no, don't use that!!!Quote

author: Wilksey
author_rank: Super Contributor
timestamp: July 23, 2015, 12:21:16 pm
content: I use those kind of programs / addons for the same purpose a lot of the time, and I have no issues.Do you need enhancement? Then look no further, go tohttp://www.bigdickandballs.comI can't see what all the fuss is about?

author: Fungus
author_rank: Super Contributor
timestamp: July 23, 2015, 01:37:48 pm
content: Quote from: Wilksey on July 23, 2015, 12:21:16 pmYou found an unregistered domain like that and didn't instantly register the name? It's got to be worth a lot more than the $14 registration fee.

author: Wilksey
author_rank: Super Contributor
timestamp: July 23, 2015, 02:56:24 pm
content: haha, to be honest, I didn't even check if such a domain existed, I never thought anyone would actually click on it!

author: TeaNTronics
author_rank: Contributor
timestamp: July 23, 2015, 06:52:21 pm
content: btw, if someone noticed at:https://youtu.be/nQH4I_p7-MI?t=2h9m8swhen the second david took piece of paper, one of the small mailbag package dropped down behind the box in the right side.edit:https://youtu.be/199gtbX1y4M?t=24m20sis it was empty or something?

author: German_EE
author_rank: Super Contributor
timestamp: July 23, 2015, 09:44:42 pm
content: Yeah, "Live streaming is not available in your country due to rights issues" I get the same message on Youtube for NASA TV.I shall therefore wait for it to come out on video
Is there an eevblog 666 ? - Page 1
Forum section: electronics / general

author: goldcoin
author_rank: Contributor
timestamp: July 29, 2015, 12:02:33 pm
content: Is there an eevblog #666 ? cause I can't seem to find it on YouTube.

author: RogerRowland
author_rank: Regular Contributor
timestamp: July 29, 2015, 12:06:10 pm
content: https://twitter.com/eevblog/status/563582807406960641https://www.eevblog.com/forum/suggestions/whatever-happened-to-video-666/
Synch - Page 1
Forum section: electronics / general

author: jobog
author_rank: Regular Contributor
timestamp: July 12, 2015, 02:34:42 am
content: Are all of the latest EEVBLOG videos out of synch with the voice for everyone or is it something with my computer? The voice is leading the video by a good 10 seconds or more. I'm watching them on Youtube.

author: rs20
author_rank: Super Contributor
timestamp: July 12, 2015, 03:07:30 am
content: Works fine for me, audio is synced perfectly with video.

author: apis
author_rank: Super Contributor
timestamp: July 12, 2015, 12:36:42 pm
content: Works fine for me too, on many different devices.

author: McBryce
author_rank: Super Contributor
timestamp: July 14, 2015, 01:47:07 pm
content: Have you tried installing the latest drivers for your graphics card? I had a similar problem a few years back.McBryce.

author: Delta
author_rank: Super Contributor
timestamp: July 14, 2015, 11:22:08 pm
content: I have that problem on my piece of shit Kindle Fire tablet. Most annoying... 😣

author: mairo
author_rank: Unknown
timestamp: July 17, 2015, 12:13:44 pm
content: What browser are you using? I had similar problem before (~ a year ago) with Firefox/Youtube, when Dave switched to a higher frames per second videos (mainly for the mailbag videos). This however was a browser problem as they were working fine on Chrome and Internet Explorer.
Whtas up with the live webcam? - Page 1
Forum section: electronics / general

author: elliottveares
author_rank: Contributor
timestamp: July 19, 2015, 10:10:02 pm
content: How long has the live webcam been off air, and why is it not 24/7 anymore? (i.e. this:http://www.eevblog.com/live/)

author: jancumps
author_rank: Unknown
timestamp: July 19, 2015, 10:36:39 pm
content: It seems to work for me right now.

author: kizzap
author_rank: Unknown
timestamp: July 19, 2015, 11:11:56 pm
content: The Camera is no longer 24/7. IIRC it is only on during the day whilst Dave is "in"

author: EEVblog
author_rank: Unknown
timestamp: July 19, 2015, 11:29:17 pm
content: Just like it says on the page, it works business hours on a mechanical timer.No point any other time, it's dark and no one is there.

author: retrolefty
author_rank: Super Contributor
timestamp: July 19, 2015, 11:50:42 pm
content: Quote from: EEVblog on July 19, 2015, 11:29:17 pmA mechanical timer? By the founder of the EEVblog?Certainly WE need to see a micro based auto daylight saving adjustment, etc, etc.

author: EEVblog
author_rank: Unknown
timestamp: July 19, 2015, 11:54:57 pm
content: Quote from: retrolefty on July 19, 2015, 11:50:42 pmYep, I like stuff that just works.

author: EvilGeniusSkis
author_rank: Regular Contributor
timestamp: July 19, 2015, 11:59:18 pm
content: Quote from: retrolefty on July 19, 2015, 11:50:42 pmDon't be silly' a micro is to simple, Dave need a raspberry pi connected to his calendar app on his phone.

author: ez24
author_rank: Super Contributor
timestamp: July 20, 2015, 04:11:33 am
content: How about a mouse and treadmill so we can see something move when no one is thereLooks like a picture otherwiseor how about a useless machinehttp://www.makershed.com/products/useless-box-kitdesigned so that no one has to flip the switch, maybe two machines tied together with a rodOR how about a Kickstarter on a useless machine that operates on its own(a fan would work)

author: miguelvp
author_rank: Super Contributor
timestamp: July 20, 2015, 04:16:54 am
content: Or you can work on your projects instead of having to look at a "nothing to see here" feed

author: ez24
author_rank: Super Contributor
timestamp: July 20, 2015, 04:50:41 am
content: Quoteha ha haI totally agree
Episode Suggestion: Interview for UI design - Page 1
Forum section: electronics / general

author: BlueCoder
author_rank: Newbie
timestamp: July 16, 2015, 04:20:16 am
content: You always point out what you think are mistakes in the UI design. I think it would be interesting if you interviewed someone from say Rigol, Agilent, fluke, etc... on UI design for oscilloscopes and other test equipment.
EEVBlog #768 Cordless Wriststrap dangerous? - Page 1
Forum section: electronics / general

author: compet17
author_rank: Regular Contributor
timestamp: July 20, 2015, 08:01:42 pm
content: Daves newest video about a wireless antistatic wriststrap..... this thing is not only a scam, it is also quite dangerous. The safety resistor inside a wrist strap is not only to dissipate the charge slowly, it's also for wour own safety. It will protect you from being electrocuted when touching a live conductor while wearing the strap.Now this wireless wrist strap has a resistor built in that contacts the philips screw on top. So far so good... But directly under the thin label is a hex nut that is directly connected to the skin contact plate. An aluminum foil label.... not a very good insulator! It's like wearing jewelry while repairing a high current power supply. O0
Switch mode power supply Auxilary transformer winding issue - Page 1
Forum section: electronics / general

author: Ayyaz Ali
author_rank: Newbie
timestamp: July 12, 2015, 05:59:49 am
content: hi, i saw one of the video blog for switch mode power supply MANSON SPS-9400 15v-40Amps and i planned to built it,i have little issue in winding the auxilary transformer in it as it is using a TOP222Y for oscillations generation, and my wrong turn ratio calculations makes the TOP222y to cook in a matter of seconds, i have read many research papers, switchmode power supply books by where they have given formulas for winding a flyback transformer but still the best i can get is my winding ratio now makes the TOP222y to become too hot in about 10 seconds while the output voltage is just fine. So anybody with the same experience please give me some suggestions of what to do.Thanks

author: albert22
author_rank: Regular Contributor
timestamp: July 12, 2015, 06:06:48 pm
content: It is possible that the core that you used is saturating. Depending on the type of the core material it may need an air gap to allow Flyback operation and prevent saturation.
PC BASED LOGIC ANALYZER - Page 1
Forum section: electronics / general

author: MrsR
author_rank: Regular Contributor
timestamp: July 03, 2015, 07:41:50 pm
content: Dave liked your Video on the PC Logic Analyzer and Rack Computer.In 1990 I ordered a 486 based computer but had some delay in getting it as there was no mother board available.Eventually we had a system built "cost $4500 Au" a bit pricey but it was to run our CAD system we also got a Wyse CAD Screen and a Roland Plotter to do our PCBs.I really liked DOS but added Windows 3.11 when we put our accounting system on it.Still use the computer,with a few mods like 20Gig hard drive as DOS could only handle 500megs then.Had Protel on it but it was lost some time ago.That system has been running for 24 plus years and though a bit slow works like a dream.Keep up the good workRachael.
EVVblog 695- what became of the Tek 2465 scopes - Page 1
Forum section: electronics / general

author: newfrontier
author_rank: Newbie
timestamp: June 20, 2015, 04:56:49 pm
content: Hello Dave: In EEV blog 695 you received a couple of bad Tektronix 2465A & B oscilloscopes, did you ever find the time to trouble shoot & evaluate what was wrong with them, or repair to get one up and running? hope I posted in the correct area.
WTB uCurrent in Belgium - Page 1
Forum section: electronics / general

author: Ribster
author_rank: Frequent Contributor
timestamp: June 13, 2015, 10:25:06 pm
content: I've been to the uCurrent page. But belgium is on some kind of list.Is it impossible for me to buy the uCurrent from Belgium ?If so, how can i get my hands on one ?Thanks in advance

author: Simon
author_rank: Unknown
timestamp: June 14, 2015, 07:39:36 am
content: I not sure if Dave means that Belgium is ok or that it's a problem. Dave and I have been talking and soon you should be able to buy the uCurrent from me in the UK just as soon as Dave receives his next batch and gets a quantity sent to me. We have come to this arrangement because of the problems with shipping Dave is having. As I'm in the EU I can ship to europe cheaper and with no customs problems.So it might be worth contacting Dave and possibly hanging on until I have some in stock (Prices will be about the same)

author: Ribster
author_rank: Frequent Contributor
timestamp: June 14, 2015, 08:31:23 am
content: Hey Simon,I'm not disturbing the man if it's not necessary.That's why i'm posting on the forum.I've got some projects coming up in the summer that are low power.So accurately measuring the current consumption would be very necessary.It seems to me that it's some sort of exclusion list. So i think i will need to wait for your stock to arrive.I'll keep your website in my favorites.Greetings

author: Simon
author_rank: Unknown
timestamp: June 14, 2015, 08:44:41 am
content: OK Well I'm sure we can do some sort of announcement. I can ship to europe for £10 whereas Dave has to use an expensive courier that costs £15-20 so hopefully a win all round.
Suggestion for EEVblog topic: Dangers of using Mains Earth direct - Page 1
Forum section: electronics / general

author: DanB
author_rank: Newbie
timestamp: May 07, 2015, 01:48:22 pm
content: G'day Dave,As I mentioned in a recent forum post (re: EEVblog #51), if you haven't already done so, may I please suggest a topic on the dangers of using Mains Earth direct, especially for use in personal ESD shielding and maybe even radio projects.Like myself, until I was educated in the 'proper ways', I'm sure there are many viewers who have thought this practice to be OK and hey, why not! Earth is earth, right? Ouch!Still getting through viewing all your blogs - only up to 51

author: vk6zgo
author_rank: Super Contributor
timestamp: June 05, 2015, 08:29:24 am
content: You've got me lost on this one!Earth mats for ESD protection,as well as wrist straps are commonly connected to Mains Earth via a large value resistor (1MegOhm or more).Even if the Earth connection was somehow elevated to Mains Active voltages,insufficient current would flow to harm you.What I don't like much is the connection of such an Earth lead via a normal mains plug where the lead could contact one of the other pins.Proper plugs are available--though,again you will be protected by the series resistor.Never leave this resistor out!Radios have been earthed to the Mains Earth for many decades with a vanishingly small risk.What are the "proper ways"?---It seems like you are the only one in the parade marching in step!

author: Deathwish
author_rank: Unknown
timestamp: June 05, 2015, 08:34:45 am
content: Question: why does everyone wear a wrist strap, why not an ankle one, I hate having anything round my wrists, its a pain having to wrangle it around with its lead.

author: tautech
author_rank: Super Contributor
timestamp: June 05, 2015, 08:40:55 am
content: Quote from: Deathwish on June 05, 2015, 08:34:45 amThe Aussies historically all wore them..... a ball and chain.

author: lincoln
author_rank: Regular Contributor
timestamp: June 05, 2015, 09:54:58 am
content: Quote from: Deathwish on June 05, 2015, 08:34:45 am<<edit >> sorry I was not done with thatI have only seen them in use in a fab environment (semiconductor / clean room) and the generally suck. (not that they are used else where, that is the only place where I have seen them exclusively used.)You need to have a clean and dissipative floor for them to have any chance to work. That being said you can put on a fresh booty and about half the time they will not past the tester. In the fabs they use them because you are covered head to toe in what ever they make the suites out of. there is next to no bare skin to get a wrist strap on.I suppose a stock room would also be a good application as well
Suggested Episode Solder Types - Page 1
Forum section: electronics / general

author: BlueCoder
author_rank: Newbie
timestamp: July 07, 2015, 01:48:49 am
content: Not sure if this is the proper section to post in. I would like to suggest an episode where you discuss the various types of solder that a beginner to an intermediate might be interested in. Specifically the variations of Kester solder since they have so many varieties.Specifically defining visually wetting and spatter, cleaning and solids content. And also solders better for new work and rework. When would you prefer a solder with silver content, etc...Every formulation number was created for a reason and a demand but their site does not make it very clear.
Topic of interest - Page 1
Forum section: electronics / general

author: Mosaic
author_rank: Regular Contributor
timestamp: June 03, 2015, 05:41:53 pm
content: Hi All:This taught me something new:https://youtu.be/BnR_DLd1PDINow for modern preamps etc, such as found in video cams....a cellular phone on silent mode (in your pocket or from a bystander)appears to emit an interfering EM squawk when it recvs a msg. This signal can get sneak into the audio recording without you knowing it. A live feed picks up the interference.I was wondering if an exercise to test this might be interesting: enclose the caps in a preamp with foil that is grounded and see if the interference is diminished. One wonders whether there are modern caps with 3 pins...one for a body ground shield/can.
The New Pi Based Camera - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: May 19, 2015, 07:19:17 pm
content: Well, it might work, but as you start work at midnight our time and finish at 8am all these German viewers of yours will miss out on the action.I can confirm that the link to the black screen works.

author: lowimpedance
author_rank: Super Contributor
timestamp: May 20, 2015, 02:25:54 am
content: Quote from: German_EE on May 19, 2015, 07:19:17 pmHeh, I'm only a few suburbs away and can also confirm a black screen operation during the 8 - 8 'ON' time !!!.

author: kizzap
author_rank: Unknown
timestamp: May 21, 2015, 06:32:10 am
content: If you expect anything to be happening in the lab between the hours of 6PM to 6AM AEST (Sydney), you are kidding yourself...

author: Asmyldof
author_rank: Regular Contributor
timestamp: May 22, 2015, 12:42:16 am
content: Pfft, what kind of a work ethic is that, then?((Assuming the Forum time showing at 10:42AM server time is Sydney time, I can confirm the confirmation of blackness post 8AM))
Why does this thermocouple measurement work so well? (EEVblog #512) - Page 1
Forum section: electronics / general

author: necessaryevil
author_rank: Regular Contributor
timestamp: May 18, 2015, 05:55:28 pm
content: Why does this thermocouple measurement in EEvblog #512 at 14:35 work so well? The sensor is just touching the regulator, so most of the sensor is exposed to the ambient.

author: electr_peter
author_rank: Unknown
timestamp: May 18, 2015, 08:33:52 pm
content: Video is cut. Thermocouple heated up "in the backstage".

author: necessaryevil
author_rank: Regular Contributor
timestamp: May 19, 2015, 07:45:32 am
content: Yes, but most of the thermocouple is exposed to the ambient air, so I would expect a much lower temperature.

author: electr_peter
author_rank: Unknown
timestamp: May 19, 2015, 05:36:54 pm
content: Thermal resistance of thermocouple <-> heatsink - very low.Thermal resistance of thermocouple <-> air - very high. Air flow is also very low.Comparatively high thermal resistance to air has almost no effect on heat transfer from heatsink to thermocouple. It is like connecting 1Ohm and 1000Ohm resistors in parallel - circuit would not see any significant difference between  and [1Ohm | 1000Ohm] load.Also, thermal mass of thermocouple is very low, so it would heat up very quickly to almost the same temperature as the metal heatsink.

author: necessaryevil
author_rank: Regular Contributor
timestamp: May 20, 2015, 08:29:52 am
content: Hmmm... Thanks! I figured out that the small thermal mass would help, but I didn't think about the thermal resistance difference.Good explanation with the parallel resistance analogy.
Post 666 - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: May 20, 2015, 08:05:00 am
content: This is my post # 666 and it's dedicated to EEV Blog Video # 666 which is gone but not forgotten. Someday it may appear like a ghost coalescing from the ether but we're not holding our breath, maybe it will appear briefly on Halloween and then vanish into the night, who knows
MobileEye - Page 1
Forum section: electronics / general

author: johanan
author_rank: Newbie
timestamp: May 17, 2015, 01:56:21 pm
content: I viewed the lane alert camera tear-down, with the MobileEye chip.I had the opportunity to hear a lecture from MobileEye CTO, and they are doing a lot of real time video processing. One of the amazing things they do is that they can classify object, and calculate these objects distance with only one camera, not two !!Don't ask me (I have no idea) or them (they won't tell you) how they do it.Johanan
EEVblog #396 - Page 1
Forum section: electronics / general

author: danadak
author_rank: Super Contributor
timestamp: May 13, 2015, 08:40:54 pm
content: Dave, just a couple of thoughts -1) Settling time will affect the sweep rate you want, especially at low f filters. So use oflow sweep rate and infinite persistence, maybe single shot, best approach to getting anaccurate bode plot.2) Use of waveform math on vertical, like 20 * log (Vin_scope) will get a db display for thesweep.Regards, Dana.
Expected uCurrent availability? - Page 1
Forum section: electronics / general

author: JimRemington
author_rank: Regular Contributor
timestamp: April 27, 2015, 06:09:03 pm
content: The "shop" says the new ones were due early April. Any updates?

author: wemme
author_rank: Regular Contributor
timestamp: May 12, 2015, 09:19:18 pm
content: They are back in stock.
The David Jones Mirror Universe You Tube Blogger - Page 1
Forum section: electronics / general

author: Towger
author_rank: Super Contributor
timestamp: May 11, 2015, 08:20:59 pm
content: Where would a series of Star Trek be without a few episodes set in Mirror Universe:http://en.memory-alpha.org/wiki/Mirror_universeQuoteWith the scene set, I give you the alternative (zone) realty You Tube blogger, from the opposite side of the planet, Fr. David Jones:https://www.youtube.com/watch?v=9BUhpes5d9U]https://www.youtube.com/channel/UCLPbkPRIesWgVIjrrVZm6twhttps://www.youtube.com/watch?v=9BUhpes5d9U]https://www.youtube.com/watch?v=9BUhpes5d9U]https://www.youtube.com/channel/UCLPbkPRIesWgVIjrrVZm6twhttps://www.youtube.com/watch?v=9BUhpes5d9U

author: SeanB
author_rank: Super Contributor
timestamp: May 11, 2015, 08:39:15 pm
content: A true mirror of Dave that......
Episode #225 (Lab Power Supply Design Part 4 - PWM Control) - Page 1
Forum section: electronics / general

author: aussieklutz
author_rank: Newbie
timestamp: May 10, 2015, 04:55:23 pm
content: Heya Dave (and other forum people),I was watching the Lab Power Supply Design series of videos prior to my first pcb design project (Custom smart watch!)The question was made of 10 turn pot vs dac vs pwm and I was curious why you didn't touch on the possiblity of using a R-2R resistor ladder DAC using discrete/ common resistors you are using elsewhere in the project to do the control?Anyway, Cya!- Aussieklutz
Shotcut video editor. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: May 03, 2015, 08:11:56 am
content: There is a "new" free, open source video editor called Shotcut. Can someone more experienced with video editing give it a try?I gave it a spin and it looks very promising.Windows version:https://github.com/mltframework/shotcut/releases/download/v15.05/shotcut-win32-150502.exeTutorials:https://www.youtube.com/channel/UCjuv-Js1znyvErPy9vZf37A/videosAlexander.
EEV Flying Pig Award - Page 1
Forum section: electronics / general

author: iceisfun
author_rank: Regular Contributor
timestamp: April 25, 2015, 01:21:26 am
content: Where is the new flying pig award?

author: SeanB
author_rank: Super Contributor
timestamp: April 25, 2015, 04:43:50 am
content: Got turned into a bacon sarmie......
Something else then a teardown, review or mailbag - Page 1
Forum section: electronics / general

author: mathias
author_rank: Regular Contributor
timestamp: March 28, 2015, 09:18:36 am
content: I'm a long time follower of the EEVblog, and I must admit that lately my interest has been slipping. Why? Because almost every episode is a teardown, review or mailbag! When is a fundamentals friday coming up? When is a new project introduced? Why not talk about (off the top of my head) modulation schemes, PLLs, logic families, ...?In comparison, The Signal Path blog also does repairs/teardowns, but also explains how everything works. Or explains how a Delta-Sigma Modulator ADC works. Really interesting stuff.Don't get me wrong, I like Dave's style of reviews and this is not an attack on the EEVblog, but lately the content has not been what it used to be.Does anybody else feel this way?

author: electr_peter
author_rank: Unknown
timestamp: March 28, 2015, 12:33:11 pm
content: Exactly the same topic was raised by newbies countless of times on this forum. In short - Dave does all kinds of videos (butyouwatch and like only part of them) and your rant does not help anybody. End of story.

author: AndyC_772
author_rank: Super Contributor
timestamp: March 28, 2015, 02:21:22 pm
content: It'll be April 1st soon. That's usually a cue for a good video

author: mathias
author_rank: Regular Contributor
timestamp: March 28, 2015, 02:36:25 pm
content: Quote from: electr_peter on March 28, 2015, 12:33:11 pmI just want to see if other people feel the same, perhaps we could nudge Dave into going deeper into some topics. That's all, if nobody cares, I don't mind either.

author: Tallie
author_rank: Regular Contributor
timestamp: April 10, 2015, 07:47:55 pm
content: I'd be happy if he only did teardown videos.

author: Stonent
author_rank: Super Contributor
timestamp: April 19, 2015, 05:13:13 am
content: Quote from: Tallie on April 10, 2015, 07:47:55 pmYeah I see stuff in the mailbag that I think I want to see inside that but a 2 minute teardown doesn't happen but mentions "a future teardown" that may or may not happen and if it doesn't I forget about it until I end up rewatching that mailbag at some future time and then wonder if it would ever appear.Yes. That was a run-on.

author: Galenbo
author_rank: Super Contributor
timestamp: April 19, 2015, 06:53:23 pm
content: Quote from: mathias on March 28, 2015, 09:18:36 amI'm going to guess what the EEVblog guys think about that:-Show me the url to your video, where you show your fundamental friday, your new project, PLL etc.
Few new user-selectable themes? - Page 1
Forum section: electronics / general

author: FlevasGR
author_rank: Regular Contributor
timestamp: April 22, 2015, 06:02:54 pm
content: Hey admins, i was wondering if you can add a new user-selectable theme for the forum. I found thisone which is based on the flat UI and it's also free!SMF site:http://custom.simplemachines.org/themes/index.php?lemma=2833Creator website:http://smftricks.com/index.php?action=downloads;sa=view;down=88It's more enjoyable for some peopleI hope you add itEDIT:Wrong location. "Suggestions" is a better place for this thread.
Electronics Today International projects - Page 1
Forum section: electronics / general

author: jshaw
author_rank: Newbie
timestamp: May 25, 2015, 04:23:36 pm
content: I am looking for a copy of the eti131 power supply project article published I think July 1976 in electronics today international.I built one but wish now to repair it and do my own mods. It was a very useful and reliable power supply but my copy of the article has degraded to unreadable. Can any body please help me. regards to all out there Jon Shaw

author: Fungus
author_rank: Super Contributor
timestamp: May 25, 2015, 07:07:04 pm
content: How does this fall under "blog specific"?
My DIY Solder smoke and fume hood - Page 1
Forum section: electronics / general

author: jmctech
author_rank: Contributor
timestamp: April 06, 2015, 12:32:10 am
content: Redoing my work area and needed a solution for smoke and fume, It is in the basement and the wife gets upset especially if I let the magic smoke out of something as the work area is directly below the master bedroom. A friend of mine owns a heating and cooling company and made me the hood in about 10 minutes. Used a four inch 100 cfm duct fan as the extractor. It is going to vent outside. I have glass block windows and can remove one block and install a dryer vent on the outside.

author: jmctech
author_rank: Contributor
timestamp: April 06, 2015, 12:51:39 am
content: Admin if you can move this to the correct spot, I posted from Tapatalk and for some reason it went here, I have tried to delete it but it wouldnt let me. Thanks, Jason

author: Fungus
author_rank: Super Contributor
timestamp: April 13, 2015, 12:55:29 pm
content: Is breathing solder smoke bad for you?

author: SeanB
author_rank: Super Contributor
timestamp: April 13, 2015, 04:18:35 pm
content: About the same as smoking Texan plain. Just without the nicotine hit, the rest of the cyclic aromatics, nano size particulates and organic acids are all there.http://www.cigarettespedia.com/index.php/Texan_%28Toasted_Plain%29_S-20-S_-_South_AfricaLovely things those, 21 per pack, 20 rolled and one loose leaf. The best coffin nails you could buy cheap.

author: Tallie
author_rank: Regular Contributor
timestamp: April 14, 2015, 12:29:32 am
content: Quote from: Fungus on April 13, 2015, 12:55:29 pmYes... I filter mine through a cigarette.

author: Psi
author_rank: Super Contributor
timestamp: April 14, 2015, 12:58:05 am
content: Better than trying to extract the fumes with ya noise i guess.
EEVBlog for Power Supply Health? - Page 1
Forum section: electronics / general

author: Xebec
author_rank: Newbie
timestamp: March 29, 2015, 12:18:54 pm
content: Hi folks - I've been watching EEVBlog occasionally for a little while and love the format/information.I was curious if there is an episode or two folks would recommend to a beginner that would help me determine the relative health of a small power supply, and maybe understand it's likelihood of failure over time?I understand this is probably as much a design question as a health of individual parts question. I'm asking as I (and others) are starting to use modified PC power supplies and the like for things such as powering vintage computers, and I'd like to make sure I don't end up selecting a power supply that will kill the much harder to replace 'old hardware'.Thanks!John H

author: 3roomlab
author_rank: Frequent Contributor
timestamp: March 29, 2015, 12:27:18 pm
content: im not pro, but the best indicator is operating temperature of critical components. hot things tend to break prematurely/faster than the well cooled. it sometimes helps if you can "FLIR" it.

author: Ian.M
author_rank: Super Contributor
timestamp: March 29, 2015, 12:36:08 pm
content: Also, if the hardware you are powering is high value, learn about crowbar circuits.http://axotron.se/index_en.php?page=26

author: DanielS
author_rank: Frequent Contributor
timestamp: March 30, 2015, 03:41:25 pm
content: Quote from: Ian.M on March 29, 2015, 12:36:08 pmAssuming your load does not mind its input voltage suddenly getting yanked to ground. How many linear regulators and opamps have died from their power supply getting turned off or shorted with a significant capacitive load attached back-feeding power through the device's output?

author: Ian.M
author_rank: Super Contributor
timestamp: March 30, 2015, 05:07:10 pm
content: Good designers allow for the possibility of the supply being shut off rapidly e.g. by using reverse diodes across linear regulators. If the high value hardware was not well designed in this respect, series Schottky power diodes between the crowbar circuit and the load can be used, or -worst case- if their Vf drop isn't tolerable, it may need a protection circuit using high-side MOSFET load switches rather than a smple crowbar circuit.Even so, without such protection, the damage due to crowbar activation is likely to be far less than that caused by a SMPSU output rising due to catastrophic loss of regulation.
For Dave! MUST READ PLEASE DAVE - Page 1
Forum section: electronics / general

author: JacobIsHere
author_rank: Contributor
timestamp: April 09, 2015, 06:44:10 am
content: Hi Dave i'm Jacob deasey i live in Canberra ACT and i love the videos. I'm nearly on school holidays and i would love to up and see the lab and meet you, when or if you see this could you Direct message me to let me know what you think! (By the way i'm only 14 so I cant drive up. :/ )?

author: Towger
author_rank: Super Contributor
timestamp: April 09, 2015, 07:00:23 am
content: Don't forget to go on the garbage room tour, you never know what you'll find!

author: JacobIsHere
author_rank: Contributor
timestamp: April 09, 2015, 08:27:44 am
content: I was going to say that! LOL

author: SL4P
author_rank: Super Contributor
timestamp: April 09, 2015, 09:38:27 am
content: The train from Kingston to Sydney is quite pleasant.

author: JacobIsHere
author_rank: Contributor
timestamp: April 09, 2015, 09:44:11 am
content: hmmm i for got about the train! Thanksi like trains :3
Dumpster 50" LG plasma - Page 1
Forum section: electronics / general

author: tom66
author_rank: Super Contributor
timestamp: March 08, 2015, 07:19:40 pm
content: https://www.youtube.com/watch?v=FPK1_hy4KMU&feature=youtu.be&aIt's a bad panel. The drivers for the panel electrodes are failed but like on the Panasonic panel you had they're bonded to the glass. This is pretty much the only fault you can't fix on a plasma (the other one being impact damage.)The drivers are basically ~256/384 channels of 70V CMOS buffer, they convert the highspeed LVDS from the panel controller to the 70V address drive. They operate at something like 4MHz and get HOT, at least on these old panels. The flicker is probably because the panel is on "cinema" or "energysave" mode, this improves the per-frame picture quality but at the expense of increased flicker. Most panels let you turn this off (but they usually hide the option away, you'll have to look for it.)

author: German_EE
author_rank: Super Contributor
timestamp: March 09, 2015, 07:46:12 pm
content: Before you do a teardown or just scrap it check carefully for loose connections and/or intermittents in the thin flex connections at the side of the plasma panel. There are a few people who have repaired sets by jamming silicone rubber tubing at the right point to maintain a connection.This is for an LCD set but the principle is the same:
The lab needs a sign - Page 1
Forum section: electronics / general

author: pickle9000
author_rank: Super Contributor
timestamp: March 01, 2015, 11:17:11 pm
content: Looks like some stuff going on in the lab today. How about hanging a sign up behind the bench?https://www.dropcam.com/p/Lvh0CG

author: necessaryevil
author_rank: Regular Contributor
timestamp: March 06, 2015, 09:25:00 am
content: Well, send it to him! Mailbag!Dave has got a beautiful sign already, I think it is on the lab door.
Have a pile of old Floppy drives and feeling creative? - Page 1
Forum section: electronics / general

author: JJSilver
author_rank: Newbie
timestamp: March 02, 2015, 02:36:14 pm
content: I felt compelled to make a post here when I came across this wonderful use of old computer hardware on Youtube. This may be something old but I was quite blown away with the creativity of turning old drives into an instrument for playing music. Maybe we can see Dave make his own?Best of luck -JJS
World's Worst Shittiest Camcorder daves rant  - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: February 17, 2015, 09:49:41 pm
content: here is a sample video i took with the same camera and for the price its fine ive use way worse cameras that cost 3x the pricehttps://www.youtube.com/watch?v=pl8WJu17WPk&feature=youtu.be

author: elgonzo
author_rank: Unknown
timestamp: February 17, 2015, 09:58:46 pm
content: To satisfy the entertainment needs of the general population, you should perhaps show videos of the worse cameras you used...

author: sony mavica
author_rank: Frequent Contributor
timestamp: February 17, 2015, 11:13:35 pm
content: i can upload a sample clip from a camera i used to have that cost $50usd that had worse video if you likebut for now here is a pic even those cheap $8 keyring cameras look way betterhttp://s3.postimg.org/avhdd3pv7/image.jpg

author: sony mavica
author_rank: Frequent Contributor
timestamp: February 18, 2015, 09:35:21 pm
content: ..
can seem to find first mailbag video  - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: February 13, 2015, 10:50:01 pm
content: can't seem to find daves first mailbag video on his channel can somebody help

author: elgonzo
author_rank: Unknown
timestamp: February 13, 2015, 10:58:10 pm
content: On Dave's website you can find anepisode list.Search for "mailbag". (The 1st mailbag should be #251)

author: sony mavica
author_rank: Frequent Contributor
timestamp: February 13, 2015, 11:17:03 pm
content: thanks
Dave, you need to build some more shelves in the lab - Page 1
Forum section: electronics / general

author: funkyant
author_rank: Unknown
timestamp: February 06, 2015, 10:16:20 am
content: Just looked at the live cam, and you have a lot of stuff on the floor, and a lot of unused space up high. Would also be more Sagan friendly

author: EEVblog
author_rank: Unknown
timestamp: February 06, 2015, 11:24:48 am
content: I plan to move more stuff to the bunker.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: February 06, 2015, 11:36:14 am
content: That's what I was thinking.Make use of the bunker.

author: funkyant
author_rank: Unknown
timestamp: February 06, 2015, 06:37:24 pm
content: Approved

author: bitwelder
author_rank: Super Contributor
timestamp: February 07, 2015, 03:06:51 pm
content: Is there STILL available shelf space in the bunker after moving the Indy train diorama in?

author: lapm
author_rank: Frequent Contributor
timestamp: February 07, 2015, 05:41:45 pm
content: Quote from: bitwelder on February 07, 2015, 03:06:51 pmThat takes just one wall of bunker, there's whole another wall to fill still...

author: jancumps
author_rank: Unknown
timestamp: February 07, 2015, 07:05:24 pm
content: Quote from: bitwelder on February 07, 2015, 03:06:51 pmHe should put the livecam in the bunker , directed to the diorama with the train running.I'd be binge watching day and night
how are pcbs made? - Page 1
Forum section: electronics / general

author: electronics man
author_rank: Frequent Contributor
timestamp: January 30, 2015, 03:32:28 pm
content: i have seen so much on how they are populated (solder past application then pick and place ect) but i haven't seen how the bare pcbs are made. i would love to see how the etching process is carried out and how tiny little vias are made. i would also like to know how multi layer boards are made. does anyone know of any good videos on the process?

author: electronics man
author_rank: Frequent Contributor
timestamp: January 30, 2015, 03:36:34 pm
content: erm i seemed to post this to the wrong board

author: hikariuk
author_rank: Unknown
timestamp: January 30, 2015, 04:56:41 pm
content: You have, however:http://www.eurocircuits.com/making-a-pcb-pcb-manufacture-step-by-step