hybridfree/eevblog-posts huggingface dataset:
uCurrent - Page 1
Forum section: electronics / general

author: Fenichel
author_rank: Contributor
timestamp: January 28, 2010, 09:38:58 pm
content: I am planning to build a uCurrent device for myself. Is there a reason that the design posted on the blog used a voltage divider and a special-purpose opamp instead of an integrated virtual ground like the TLE2426?

author: EEVblog
author_rank: Unknown
timestamp: January 29, 2010, 02:17:10 am
content: No reason apart from cost.The LMV321 opamp is 28 cents, the TLE2426 is 70 cents or so.The LMV321 is nothing special, it's just a low power general purpose opamp that was cheap and available.Dave.

author: dmage
author_rank: Newbie
timestamp: June 17, 2012, 02:54:34 pm
content: Hi.This device is very nice for measuring current in one selected ranges, butthere is a situation when you need to measure accurate current in 0-100mA and 0-10uA at the same time.Can i use two devices in series to solve my problem or i shoul use another approach ?
EEVblog #292 - Johnny B. Good - Page 1
Forum section: electronics / general

author: Boloop
author_rank: Contributor
timestamp: June 12, 2012, 08:04:27 pm
content: So the bear visit's David's surgery to get a new battery compartment.As for the Chinese, I shot off a quick email to a friend who can read the stuff. Apparently It is read as Yue Han, ??,? Which translate to the name John. Maybe they make loads of them with different programmed songs, as this was the Johnny version. So that mystery is solved. Although Sagan remains unconvinced. :p

author: SeanB
author_rank: Super Contributor
timestamp: June 12, 2012, 08:10:29 pm
content: At least that came apart. Some I have met use enough glue to stick the entire battery compartment into the insides, and this gums up the works totally.

author: retiredcaps
author_rank: Super Contributor
timestamp: June 13, 2012, 04:20:26 am
content: Maybe I should have hacked my Fluke 187 like Dave?https://www.eevblog.com/forum/general-chat/fluke-187-corroded-battery-terminals-how-to-clean/

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: June 13, 2012, 09:06:43 am
content: I've been MOONED!

author: Amarbir[Lynx-India]
author_rank: Frequent Contributor
timestamp: June 13, 2012, 09:48:31 am
content: Quote from: retiredcaps on June 13, 2012, 04:20:26 amHi ,I Have a Similiar Situation with My Scopemeter and i will Take some Reading + Suggestions And solve The Issue .

author: LaurenceW
author_rank: Frequent Contributor
timestamp: June 13, 2012, 07:56:57 pm
content: Tear down Tuesday?"Bear Down" Tuesday, more like
DaveCAD - Page 1
Forum section: electronics / general

author: chrome
author_rank: Regular Contributor
timestamp: July 07, 2012, 01:02:47 pm
content: Shouldn't DaveCAD be called like DAD or something?Unless Dave is a computer it's not a Computer-aided Design.DAD however would be Dave-aided Design (or Dave Assisted Design/Drawing)

author: G7PSK
author_rank: Super Contributor
timestamp: July 07, 2012, 02:04:55 pm
content: I would like a copy of Dave CAD. Fully autonomous without me having to do more than just give a brief idea to get a fully functioning drawing. Of course the upgrade to Dave CAD/CAM would be better still.

author: vk6zgo
author_rank: Super Contributor
timestamp: July 07, 2012, 02:20:09 pm
content: Some of the "beginners" think that this forum provides just such a service!

author: Short Circuit
author_rank: Frequent Contributor
timestamp: July 07, 2012, 07:50:16 pm
content: think Chalkboard instead of Computer

author: EEMarc
author_rank: Regular Contributor
timestamp: July 11, 2012, 08:15:51 pm
content: Only 60 years ago, a computer was job position for someone who does computations. It isn't much of a stretch to call a person a computer as they have the capability to do what an electronic computer does, computes.
EEVblog #290 - Mailbag - Page 1
Forum section: electronics / general

author: nitro2k01
author_rank: Frequent Contributor
timestamp: June 11, 2012, 11:06:10 am
content: So that guy got two packages from Renesas? I requested a free sample board for the contest two (?) years ago, and I got two of them with a week between them. I'm wondering if Renesas does this often.

author: Psi
author_rank: Super Contributor
timestamp: June 11, 2012, 11:56:55 am
content: You'd think, if they were going to send people two, they'd send them in the same package and save on postage.

author: nitro2k01
author_rank: Frequent Contributor
timestamp: June 11, 2012, 01:32:00 pm
content: Yeah, I think both in his and my cases, it was a cock-up in the communication so they didn't know they had already sent one. So I'm wondering if Renesas' free stuff department does this often.

author: Guppzor
author_rank: Contributor
timestamp: June 12, 2012, 01:47:34 am
content: Quote from: nitro2k01 on June 11, 2012, 11:06:10 amMine were about two weeks apart from memory.Edit: Dave - Sorry I didn't send something that actually worked. Maybe thats why I got the extra one... :-P
293 Fluke Birthday Cake - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: June 18, 2012, 07:43:52 am
content: Happy Birthday Dave, Just wondering what the resolution was for that Fluke cake.

author: Mercator
author_rank: Contributor
timestamp: June 18, 2012, 11:55:48 am
content: Happy Birthday. What a wonderful cake. What did the filling taste like?It is like a message to the world: Less pollution. Just eat up your old equipment.

author: T4P
author_rank: Super Contributor
timestamp: June 18, 2012, 12:36:45 pm
content: Quote from: G7PSK on June 18, 2012, 07:43:52 am5-1/2 sliceswith 0.01% deviation +-1molecule

author: LaurenceW
author_rank: Frequent Contributor
timestamp: June 18, 2012, 07:13:42 pm
content: What's the CURRANT rating <sorry>

author: SeanB
author_rank: Super Contributor
timestamp: June 18, 2012, 07:22:20 pm
content: From the teardown it would appear that it was limited to zero, but it was a high sugar experience. Sagan must have been on a sugar high for hours afterwards.

author: caroper
author_rank: Regular Contributor
timestamp: June 18, 2012, 09:06:46 pm
content: Could you let us know the energy consumption in calories?
EEVblog #288 – Transit Of Venus 2012 - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: June 07, 2012, 09:26:22 pm
content: Thanks for the video of the transit Dave, I did not get to see it here as we had lots of cloud. Nice to see the transit of Dave again as well instead of being in the lab all the time.
EEVBlog #286 - Page 1
Forum section: electronics / general

author: PeteInTexas
author_rank: Frequent Contributor
timestamp: June 03, 2012, 03:38:24 am
content: Anybody else squirmed a little when Dave wrote down the "reference point" as 1 instead of 10^0 in the second column of the first white board? It would have helped reinforce the notion of "being within the ballpark" as no difference in the order of magnitude.

author: Bored@Work
author_rank: Super Contributor
timestamp: June 03, 2012, 07:07:20 am
content: No.
EEVblog #283 - Agilent U1732B Contest Draw - Page 1
Forum section: electronics / general

author: mjo
author_rank: Newbie
timestamp: May 30, 2012, 12:46:55 pm
content: Hi.When I watch this episode from iTunes on the Mac the aspect ratio is broken: the height is about 2.5x the width. Episodes #282 and #284 were fine.

author: EEVblog
author_rank: Unknown
timestamp: May 30, 2012, 01:05:54 pm
content: Thanks, fixed, uploading now.Dave.
Forum is picky about attachment file types - Page 1
Forum section: electronics / general

author: hlavac
author_rank: Frequent Contributor
timestamp: June 01, 2012, 11:06:38 pm
content: Dave,could you somehow persuade the forum to allow .c and .hex files as attachments? Maybe .h and .asm too?

author: EEVblog
author_rank: Unknown
timestamp: June 02, 2012, 03:41:21 am
content: Done.Dave.
Bad Post in Snake Oil Thread. - Page 1
Forum section: electronics / general

author: PeterG
author_rank: Frequent Contributor
timestamp: May 29, 2012, 12:54:32 am
content: Hi all, i tried to load page 5 of the Snake Oil Thread and it triggered the following page.Maybe an Admin should check it out.Regards

author: EEVblog
author_rank: Unknown
timestamp: May 29, 2012, 01:31:06 am
content: Thanks.It was just an image link, so no harm, but it's been removed.Dave.

author: Monkeh
author_rank: Super Contributor
timestamp: May 29, 2012, 02:04:32 am
content: It's just Google being unwantedly intrusive and flagging on nothing. It's Dealextreme's CDN..

author: PeterG
author_rank: Frequent Contributor
timestamp: May 29, 2012, 02:25:36 am
content: Quote from: Monkeh on May 29, 2012, 02:04:32 amThis may be so, but i would rather err on the side of caution. Even if it is DX.Regards

author: Monkeh
author_rank: Super Contributor
timestamp: May 29, 2012, 02:37:16 am
content: Quote from: PeterG on May 29, 2012, 02:25:36 amThey base their assertion that it's 'known to distribute malware' on a stupid tool which identifies it as 'suspicious' due to a redirect back to the main site.

author: vk6zgo
author_rank: Super Contributor
timestamp: May 29, 2012, 04:58:44 am
content: I'm always very suspicious of such notices.Sometimes they are not the real thing,& a click on the link downloads "scamware" which does a pretend scan of your computer,says it is full of malware & asks you for money to "fix" the non-existent problem!System Restore usually makes it go away.
only one part of the Talking Electronics is on the itunes  - Page 1
Forum section: electronics / general

author: r
author_rank: Contributor
timestamp: May 22, 2012, 05:55:51 pm
content: there is a problem with the Talking Electronics on the itunes feed there is only on there or are they putting them on one at a time

author: EEVblog
author_rank: Unknown
timestamp: May 25, 2012, 11:40:25 am
content: Yeah, sorry, I'm not sure how to fix that. Podpress accepted all 5 files, but something else doesn't like it obviously.You can download direct.Currently changing over the eevblog.org server where the files are hosted, so they might be down for another day or so.Dave.
Surplus Electronics Market in Australia... - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: May 21, 2012, 10:14:03 pm
content: Dave, your item on Talking Electronics drew me back to my days in the electronics industry here in Jersey, where we had RCA the real company, designing and testing broadcasting equipments... I worked there on secondment from the Rediffusion UK company where I worked, primary within the Reditronics R&D laboratory section, until the UK government of the day, decided to break-up any large companies, and sell them off; bad days and millions of skilled electronic individuals, unemployed.And was wondering how the surplus electronics market in Australia has changed, since I tried to become a resident back in the 1990's... to cut a long story short, I found myself competing with lots of unemployed Australians within the electronics industry, this continued for a good 6-7 years on; thus with two failed attempts to stay, not helped by personal ties, pulling me back to Jersey the Channel Islands.Anyway, while i was staying at Oatley Electronics in Sydney, Branco the company and he's family, were very good to me and very welcoming; we went around a number of surplus companies in the area, and I was astounded at the dollar value of test equipments and parts, that seem to be close-out items; this was in the 1990-1992 period.I see Oatley Electronics is still around, but lost contact with Branco, and see he sells a wide range of products on his web-site:http://secure.oatleyelectronics.com//index.phptheir is considerable more hardware, than the kits that he used to designed, back then; as I recall, these were made into articles for Silicon chip and I think also, Electronics Australia.
EEVblog #272 - Manson 9400 40A 3-15V Switchmode PSU Teardown - Page 1
Forum section: electronics / general

author: si2030
author_rank: Newbie
timestamp: May 04, 2012, 04:54:55 am
content: Hi Dave,So I watched with avid interest the episode on the above power supply... really helpful and informative... I was wondering though whether you might put an episode together specifically on the TL494 and in particular the way the error amps are being used in this and other supplies for those of us that are challenged in this area. I naturally downloaded the service manual on the above power supply and saw there was quite a bit of circuitry with regard to the error amp and how its been designed. I dont understand this part of the PWM and in particular how to work with error amps in this and other chips of this kind. Is it possible to do an episode or episodes on the way this aspect of control works?Kind regardsSimon

author: xquercus
author_rank: Contributor
timestamp: May 05, 2012, 04:23:42 am
content: Dave,Thanks for the follow up blog on power factor correction. I've never considered this issue in regard to power supply design.-Jeff

author: maxpayne
author_rank: Regular Contributor
timestamp: May 06, 2012, 04:45:14 pm
content: Dave,enjoyed the episode with great pleasure. I also support Si2030's comment. Please ada a tutorial on how to design and stabilize feedback loop and compensate for a stable design on various SMPS topology.In this Manson SMPS which topology is used ? its more like half-bridge. I have another question in my mind, why ac coupling is used instead of direct connection in the primary of main power transformer ?

author: jahonen
author_rank: Super Contributor
timestamp: May 06, 2012, 05:01:59 pm
content: AC coupling is there to avoid flux imbalance problems. If there would be even very slight DC component on the switching waveform, then the transformer would be saturated from that DC and switching mosfets would be destroyed. AC coupling is simple way to avoid that without adding much complexity.Topology surely looks like a half-bridge to me.Regards,Janne

author: aargee
author_rank: Frequent Contributor
timestamp: May 06, 2012, 11:43:08 pm
content: Well Dave, does it actually do a wire melting 15V @ 40A?
EEVblog #230 - ArduCopter ArduPilot Troubleshooting - Page 1
Forum section: electronics / general

author: lgbeno
author_rank: Frequent Contributor
timestamp: June 05, 2012, 08:43:31 pm
content: Hi Dave,What ever happened to the ArduCopter, how is that thing going?Also just curious if you were aware of the website kickstarter.com and if you have ever thought about running a campaign on there for either your blog website or one of your latest projects.-Luke
Mail bag item to test to failure - Page 1
Forum section: electronics / general

author: JimmyM
author_rank: Regular Contributor
timestamp: April 25, 2012, 04:56:05 am
content: I love the mail bag.I have built a Microcontroller based regulator for incandescent bulbs in the 1-2 kW range. I want to send you one for your mailbag. I just have to get around to sending it.A link to it, and development can be foundhttp://www.candlepowerforums.com/vb/showthread.php?295756-Pre-Order-JM-PhD-X1-PWM-Lantern-Regulator. Yes, I have been selling them, but the recipient audience seems to have been saturated. So I figure you might like one to test, fiddle, blow up. I've only been able to test at 50V (battery) input and 15V/30A RMS output.
EEVblog #284 - Elan Micro Corp - Page 1
Forum section: electronics / general

author: Pat Pending
author_rank: Regular Contributor
timestamp: June 05, 2012, 07:24:18 pm
content: I'd just purchased this educational robot kit made by Elenco for my kid, and would not havegiven its microcontroller a seconds thought were it not also a product from Elan Micro Corp.Unlike the Braun, this uses a 78P156 8bit uC.Further browsing of thehttp://www.elenco.compdf catalog revealed the 200-in-one electronics kits, the MX-907.Is this the same all-in-one kit Dave talks about?

author: Kevin.D
author_rank: Frequent Contributor
timestamp: June 05, 2012, 08:00:24 pm
content: Yes that's the very same one .Been around along time those kits have .I bought one from Tandy in the 80's .
EEVblog #269 - Energy Micro Tiny Gecko - Page 1
Forum section: electronics / general

author: BobC
author_rank: Unknown
timestamp: April 21, 2012, 07:48:20 pm
content: Great overview! I attended a half-day Energy Micro seminar that was hosted by a local distributor, and Dave covered the most important parts. Still, if you can attend one of those seminars, I recommend it.
EEV Blog KiCad - Page 1
Forum section: electronics / general

author: MagFlux
author_rank: Contributor
timestamp: April 11, 2012, 01:28:00 am
content: I just got around to trying KiCad and noticed that the print out on my DeskJet is very slow to produce and very faint. All the other software that I have , and tried(DipTrace etc) all work fine.If this can be resolved it would be a toss up between KiCad and DipTrace. If not, then it will be DipTrace that I choose. Anyone have any input as to either the problem or any other Pros/Cons of each?

author: amspire
author_rank: Super Contributor
timestamp: April 11, 2012, 01:56:15 am
content: KiCad doesn't give a huge range of formatting options.In the Preferences->Options, you can increase the default line width to 15 mils.Also I nearly always have the Box to print in Black and White ticked in the Print dialog box, as the colours are usually only relevant to the schematic editor.Richard.

author: MagFlux
author_rank: Contributor
timestamp: April 11, 2012, 09:00:28 pm
content: Thanks Richard,Took your advice and also changed component body, value, pins etc to darker colors.Looks KiCad is back in the race.

author: McMonster
author_rank: Frequent Contributor
timestamp: April 11, 2012, 10:23:45 pm
content: As an alternative you may also try exporting to SVG (plotting in KiCAD's language) and using an external application like Inkscape for greater control over the printing. That's what I'm always using for exporting to image, pain in the ass, but gives best results for me.
EEV Blog#180 Soldering Tutorial Question - Page 1
Forum section: electronics / general

author: boostedsupra
author_rank: Newbie
timestamp: April 14, 2012, 08:28:33 am
content: Dave, in ur blog#180, at 6:31 in the video u show a really nice led illuminated magnifier, i have searched all over the web and ebay and cannot find one like the particular unit u showed in the video. can u give me the link to finding one, thanks

author: T4P
author_rank: Super Contributor
timestamp: April 14, 2012, 09:55:15 am
content: Guess this shall do :http://www.totobay.com/reading-lamp-928a-220v_p13600.html
EEVBlog #267 and #265 - Page 1
Forum section: electronics / general

author: solid_liq
author_rank: Newbie
timestamp: April 13, 2012, 02:43:45 am
content: Hey Dave, what did you do differently with how you uploaded these two episodes to Youtube? Unlike your other episodes, they will NOT show up in a search in my Samsung Youtube App on my Bluray player. I always watch your vlog on my TV. For these two episodes, though, I had to resort to watching them on my computer. Is there some way you can check to make sure they show up in all the Youtube apps in the future? At the same time, maybe there's a way you can find out why I usually have to wait up to 24 hours before your episodes hit the Youtube Apps (I can't see them for that long after I see them available on the Youtube website).

author: T4P
author_rank: Super Contributor
timestamp: April 13, 2012, 05:37:18 am
content: The options are BLANK to us youtubers .It's about how Samsung does it , it might cache a day earlier and only refresh the cache the next day .And it can be possible that Samsung is screwing it's users like it did with it's phones .Why i mention phones , when the Galaxy S came out and S II came out , pretty much a hell lot of apps are unusable .

author: EEVblog
author_rank: Unknown
timestamp: April 13, 2012, 06:15:08 am
content: No idea, sorry, nothing different as a far as I know.Have never used a Youtube app.MY new media box has one though, I might try it.Dave.

author: metalphreak
author_rank: Frequent Contributor
timestamp: April 13, 2012, 11:37:58 am
content: I sometimes watch the blog videos on my AppleTV and I've noticed a few times the latest videos don't show up even when searching specifically for the title. I would guess either Apple/Samsung use their own caching (or 3rd party) or google itself has a separate API interface for these devices that takes a while to catch up to the main youtube site.

author: solid_liq
author_rank: Newbie
timestamp: April 14, 2012, 09:41:36 am
content: Yeah, that's exactly how I search for them: by title. These two episodesstillhaven't shown up on there. I hope this isn't a sign of things to come.
EEVblog - uCurrent article  - Page 1
Forum section: electronics / general

author: Bob Engelhardt
author_rank: Newbie
timestamp: April 11, 2012, 02:01:43 pm
content: I hope that this is the right forum - it isn't actually about an EEVblog, but the article link is there. And I hope that it hasn't been discussed before, but I couldn't find it.I think that that switch SW1A is superfluous. It's common is connected to IN+ for all settings of the switch. IOW, a wire from IN+ to R12 would serve the same function.It seems to me that it would be better not running the sense signal through switch contacts and a single pole switch would be cheaper.Am I missing something?Bob

author: grenert
author_rank: Frequent Contributor
timestamp: April 11, 2012, 02:35:05 pm
content: If you didn't have that switch there, and all three lines were just connected to R12, then all three resistors R1, R2 and R8 would always be in the circuit, regardless of the setting of SW1B, effectively turning everything into a mA setting (since the resistance of R1 will dominate in parallel).

author: amspire
author_rank: Super Contributor
timestamp: April 11, 2012, 02:36:56 pm
content: Quote from: Bob Engelhardt on April 11, 2012, 02:01:43 pmYes, you are missing something.A switch can easily have a contact resistance of 20 milliOhms If you try and switch in a 10 milliOhm current sense resistor with a 20 milliOhm contact resistance switch, then you could end up with no accuracy at all. The uCurrent could read high by 200% with your suggested wiring as you would be measuring the voltage across the sense resistor plus the SW1B contact resistance. Even the best quality switches only offer about 1 milliOhm contact resistance and that would give 10% accuracy on the maximum current range.Sw1A ensures that the uCurrent sees only the voltage across the current sense resistor in use, and so the effect of the switch SW1B contact resistance is eliminated.Richard.

author: ejeffrey
author_rank: Super Contributor
timestamp: April 11, 2012, 02:37:55 pm
content: Nope. The point is that no current flows through SW1A, so the contact resistance is unimportant. The full sense current flows through SW1B, and thus it has some voltage drop due to contact resistance. If you omitted SW1A, the sense lead would see the voltage drop across SW1B in series with the sense resistor. It would cause a serious error on the milliamps range, a non-negligible error on the microamps range, and no error on the nanoamps.

author: Bob Engelhardt
author_rank: Newbie
timestamp: April 11, 2012, 03:13:01 pm
content: Quote from: grenert on April 11, 2012, 02:35:05 pmActually, no. The 3 shunt resistors would still be switched by SW1B.

author: Bob Engelhardt
author_rank: Newbie
timestamp: April 11, 2012, 03:19:10 pm
content: QuoteRiiigght! Thanks, Bob
idea for teardown - Page 1
Forum section: electronics / general

author: eevblogfan
author_rank: Frequent Contributor
timestamp: April 09, 2012, 12:21:30 pm
content: hey Davecan you please make an teardown of the lovely 3478A ?and maybe even a review ? (I know you don't really like bench meters ) but I would like to know how do they work etc ,are there anyone else who would like that teardown ?or the keithley current source ? (I think that you've said something about future teardown of them back then .... )thank you in advance !
Help,My RIGOL ds1052E can't connect to the computer anymore! - Page 1
Forum section: electronics / general

author: ming3761
author_rank: Newbie
timestamp: April 06, 2012, 05:50:27 am
content: Help! First of all.thanks a lot to those who provided the approach to hach the rigol ds1052E.After being hacked to DS1152E,it become really powerful,that I get a signal of seveal hundreds mhz via FFT translation.HOWEVER,after my rigol being hacked,it can not connect to the computer any more,neither via usb or serial port, I really what it to do acquisition with labview.Who can give me a solution? My appreciation to you is beyond word.

author: Mint.
author_rank: Frequent Contributor
timestamp: April 06, 2012, 11:45:55 pm
content: Bumping, somebody help this guy!

author: Psi
author_rank: Super Contributor
timestamp: April 07, 2012, 12:19:04 am
content: this is quite odd. Are you sure its a fault with the rigol and not your drivers, cables, pc or terminal software?have you tried a different computer?

author: ming3761
author_rank: Newbie
timestamp: April 07, 2012, 03:12:52 am
content: of course, I have try almost every possible methods to make my rigol connect to computer again,but failed.UNLESS,I downgrade it to 2.02,and change its model back to DS1052E, then it can be connected again. It just upset me. it makes me diffcult to make choice,for I really appreciate the higher bandwidth, but I need it communicate with my labview so that i can collect the data and do the analysis? I just don't know why,may be it can be tackled by modify some code in the firmware.

author: Psi
author_rank: Super Contributor
timestamp: April 07, 2012, 03:43:42 am
content: i could see rigol possibly changing the usb remote software to detect hacked units and refusing to work. but i cant see why the serial would stop workingunless the serial and usb hardware is different on the new models. but i would have expected others to have come across the issue too. and as far as i know, none havehave you done a recalibrate on the unit after the hack. Maybe that resets some of the communications stuff as well

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 07, 2012, 06:51:04 am
content: have you reinstall the visa driver? and what's wrong with 2.02? hacked to ds1152e?

author: icon
author_rank: Regular Contributor
timestamp: April 07, 2012, 03:22:29 pm
content: I have replied in the other thread, too, but just in case; my hacked DS1052E connects just fine.John

author: Barryg41
author_rank: Contributor
timestamp: April 08, 2012, 02:12:57 am
content: When I got my new DS1052E, I had to go to the Utility menu then picked I/O Setup. I changed USB to computer for the scope to work with my computer.Maybe it is set for PictBridge.

author: ming3761
author_rank: Newbie
timestamp: April 08, 2012, 02:46:49 pm
content: MY hardware version is 58. I have aready set it to computer mode. when my rigol scope plugged in USB, it just no reflection at all, even the "dingdong" sound of the window,ALSO i recalibrate it for several times,but it still not work.
My version of the ep#102 Constant Current Dummy Load - Page 1
Forum section: electronics / general

author: chrisw957
author_rank: Newbie
timestamp: May 22, 2011, 09:53:47 pm
content: I finally got around to creating a version of the constant current dummy load. I've been meaning to do it for awhile now, but never found the time. I think it will be useful for testing various buck/boost switching power supplies that we're always building. I kept everything pretty similar to the original, so it can handle about 15 watts, which is plenty for my purposes.I have some extra boards that I'm selling as a kit if anyone wants to build one:http://www.sleepyrobot.com/?p=95thanks,chris

author: linux-works
author_rank: Super Contributor
timestamp: April 24, 2012, 02:19:28 am
content: hi all. my first post to this forum will be a photo of my implementation of the 'active load' using the op-amp and mosfet.on mine, I used an old cpu heatsink/fan, drilled and tapped holes for the various hot devices and mounted everything there. a small pcb stands off and holds the op-amp and a small molex for power and voltage-control.also on the heatsink is a thermistor that I plan to use to cpu-control the fan (not shown but there's a fan behind this heatsink).thanks for the cool idea, dave! I enjoy viewing your videos, although you are causing me to buy more equipment ../bryan
Speaking of April Fools Jokes - Page 1
Forum section: electronics / general

author: bearman
author_rank: Regular Contributor
timestamp: April 03, 2012, 10:23:25 pm
content: Check this one out. Another free energy gimmick.Self powered power strip. Gotta love this one.EnjoyB

author: hans
author_rank: Super Contributor
timestamp: April 06, 2012, 05:04:26 pm
content: It's actually quite genius to have a cable off-camera powering the devices.(note that at the 'proof of concept' he doesn't capture the whole picture :-))

author: Mint.
author_rank: Frequent Contributor
timestamp: April 06, 2012, 11:45:24 pm
content: I really like this one, genius!
Teardown tuesday - Page 1
Forum section: electronics / general

author: king.oslo
author_rank: Frequent Contributor
timestamp: April 03, 2012, 01:54:51 pm
content: Sounds fantastic! You should do a tutorial thursday too.M

author: McMonster
author_rank: Frequent Contributor
timestamp: April 03, 2012, 09:20:18 pm
content: I vote for rant sunday!

author: T4P
author_rank: Super Contributor
timestamp: April 03, 2012, 09:43:27 pm
content: And review saturday

author: baljemmett
author_rank: Unknown
timestamp: April 03, 2012, 10:37:47 pm
content: Quote from: McMonster on April 03, 2012, 09:20:18 pmI think if Dave arranged a regular thing at the weekend there'd be ranting a-plenty, but not from him

author: EEVblog
author_rank: Unknown
timestamp: April 03, 2012, 10:42:21 pm
content: Quote from: baljemmett on April 03, 2012, 10:37:47 pmYep, and I could just record her, plenty of content there!Dave.

author: azrobbo
author_rank: Newbie
timestamp: April 08, 2012, 04:27:05 am
content: I like the idea - and it does have a catchy name.If you decide to do this, I would suggest you film/edit so the episodes hit the site on Tuesday (vs. just being 'filmed' on Tuesday).

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 08, 2012, 05:41:50 am
content: Quote from: EEVblog on April 03, 2012, 10:42:21 pmand not ee related stuff. could be a good thing to invite more "audience" to the forum.
Missing rss feeds - episode #14 - episode #126 - Page 1
Forum section: electronics / general

author: d3javu
author_rank: Regular Contributor
timestamp: March 29, 2012, 07:01:32 am
content: Hi everyone,I notice that a lot of episodes are missing in the rss feed (episode #14 - episode #126) . Anyone else having the same issue? I searched through the forum and found couple of topics on rss issue but still not the same as the one i am having.Thanks.
EEV Power Supply and floating ground - Page 1
Forum section: electronics / general

author: joegtp
author_rank: Contributor
timestamp: April 03, 2012, 02:58:23 pm
content: I'm building up Dave's power supply but I want to have it plugged in instead of battery powered. What is the best way to get the outputs floating? Are those cheap wall wart power supplies floating usually?

author: firewalker
author_rank: Super Contributor
timestamp: April 03, 2012, 03:24:24 pm
content: If it uses a simple transformer yes. I would choose a transformer one to avoid any noise of a switching one.Alexander.

author: amspire
author_rank: Super Contributor
timestamp: April 03, 2012, 03:42:50 pm
content: You still need the switching pre-regulator from Dave's RevC circuit if you want a full 20V 1A output.If you are going back to a heatsink + fully linear regulator, you will probably have to make the supply 0-10V @ 1A or 0-20V @ 0.5A.Richard.

author: gxti
author_rank: Frequent Contributor
timestamp: April 03, 2012, 05:47:42 pm
content: Any safe mains supply is intrinsically isolated. It's just that sometimes one output, usually the negative one, is then tied to earth to keep the output from floating. If your wall wart does not have an earth connection then it will (hopefully!) be floating.
Did Dave ever review the U1253B? - Page 1
Forum section: electronics / general

author: king.oslo
author_rank: Frequent Contributor
timestamp: March 26, 2012, 11:34:03 am
content: Hello,I am interested in the U1252B. In the U1253A review, he promissed a review of the U1253B. It'd be interesting to learn what the changes are. Did he ever carry it out? I could not find it on the episodes list, but perhaps it is included in another episode?ThanksM

author: EEVblog
author_rank: Unknown
timestamp: March 26, 2012, 11:43:19 am
content: Agilent never followed through and sent me one.So, no review, sorry.Dave.

author: king.oslo
author_rank: Frequent Contributor
timestamp: March 26, 2012, 01:11:04 pm
content: No worries Dave. I take it as a hint from Agilent that they do not want to sellOr perhaps they realised they have work to do on the B model tooM

author: robrenz
author_rank: Super Contributor
timestamp: March 26, 2012, 03:24:29 pm
content: What about the Agilent U1733C - IET DE-5000 comparison/review? Patiently waiting

author: king.oslo
author_rank: Frequent Contributor
timestamp: March 26, 2012, 07:20:55 pm
content: Quote from: robrenz on March 26, 2012, 03:24:29 pmI do not mean to subtract from the importance of your request. I just came to think of something funny:I bought an U1733C. IET told me in an email that the designers of the DE5000 left out the shielding and input protection by accident. I have the email, I can post it if you think it sounds interestingMarius

author: robrenz
author_rank: Super Contributor
timestamp: March 26, 2012, 07:40:31 pm
content: Quote from: king.oslo on March 26, 2012, 07:20:55 pmMarius,Since I own the DE-5000 I would be very interested.Thanks, Robin

author: king.oslo
author_rank: Frequent Contributor
timestamp: March 26, 2012, 08:27:16 pm
content: Robin, I agreeIt'd be good to test the weaknesses of both. Are you happy with yours so far?MThese are the emails. I was surprised to learn that shielding and input protection could be an oversight:Quote

author: robrenz
author_rank: Super Contributor
timestamp: March 26, 2012, 08:53:29 pm
content: Thanks, I love mine. I have nothing to compare it to but it is very repeatable and settles very fast. works especially well on low resistances (ESR mode) because the ac excitation removes thermal emf errors and it has 1 miliohm resolution in that mode. I sorted a ton of capacitors and resitors I had and it worked extremly well.

author: king.oslo
author_rank: Frequent Contributor
timestamp: March 26, 2012, 11:31:12 pm
content: Good stuff man. We will have to wait and see if Dave will teach us how they compareM
Ads not showing up - Page 1
Forum section: electronics / general

author: ivan747
author_rank: Super Contributor
timestamp: March 24, 2012, 02:27:46 am
content: On both forum adds, all I see is this:ERRORTHE PAGE YOU HAVE REQUESTED CANNOT BE FOUNDPlease select one of the navigation links at the top of this page to access other sections of this site. If you feel that you have found a bug in our site or have a suggestion, please email support@supplyframe.com.I have tried with 2 different browsers and I believe I have tried this on a different connection. It was working 12 hours ago.

author: Psi
author_rank: Super Contributor
timestamp: March 24, 2012, 02:42:09 am
content: yeah, its normalthe ad sponsor keeps breaking the ads

author: ivan747
author_rank: Super Contributor
timestamp: March 24, 2012, 03:02:51 am
content: Ads get broken every once in a whileah, well, what can I do, anyway.

author: EEVblog
author_rank: Unknown
timestamp: March 24, 2012, 05:54:30 am
content: Yep, Findchips always seem to be having issues in various geographical areas.They know about the issues and are working on them.Dave.
any news about flux capacitor tee shirt ? - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 18, 2012, 04:46:41 pm
content: or aren't i allow to mention "flux capacitor"

author: hans
author_rank: Super Contributor
timestamp: March 18, 2012, 09:20:58 pm
content: Are you meaning this one?http://www.zazzle.com/fluxgate_condenser_tshirt-235358197897656959

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 18, 2012, 10:09:09 pm
content: condensor ? don't sound right

author: Neilm
author_rank: Super Contributor
timestamp: March 18, 2012, 10:11:37 pm
content: Quote from: siliconmix on March 18, 2012, 10:09:09 pmCondenser is an old word for capacitor.Neil

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 18, 2012, 10:13:28 pm
content: yeah i know but it dont sound right

author: Neilm
author_rank: Super Contributor
timestamp: March 18, 2012, 10:20:20 pm
content: Quote from: siliconmix on March 18, 2012, 10:13:28 pmTrue.It also has the advantage that the trolls at the film company are less likely to spot it.Neil

author: metalphreak
author_rank: Frequent Contributor
timestamp: March 19, 2012, 09:22:49 am
content: I'm pretty sure engineers have been using the terms "flux" and "capacitor" long before the movie(s) were made, so they can't exactly claim rights to it

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 19, 2012, 09:47:44 am
content: thats what i was thinking.i wonder if sales of shirts have increased because of the interest this must have caused ?
DJ in ECN's Euope Daily - Page 1
Forum section: electronics / general

author: Short Circuit
author_rank: Frequent Contributor
timestamp: March 20, 2012, 09:18:19 am
content: http://view.mail.advantagebusinessmedia.com/?j=fe9616757167037f77&m=fe9d157075610d7f74&ls=fe2617747364077a701079&l=ff041571736506&s=fe4d117472610d747113&jb=ffcf14&ju=fe4c16777c6c02747310&r=0http://www.ecnmag.com/Blogs/2012/03/From-prototype-to-volume/?et_cid=2543722&et_rid=54759947&linkid=http%3a%2f%2fwww.ecnmag.com%2fBlogs%2f2012%2f03%2fFrom-prototype-to-volume%2f

author: BravoV
author_rank: Super Contributor
timestamp: March 20, 2012, 10:42:05 am
content: Nice exposure, congrats Dave !Attached screen shots here for Dave'sego, err.. I mean documentation and archiving purpose !.. just j/k Dave ...

author: EEVblog
author_rank: Unknown
timestamp: March 20, 2012, 09:50:57 pm
content: M.Simon gave me the heads up on that one.Is it just me or is the ECN Blog site the most convoluted possible?You can't even follow your favourite blog author it seems, it just all gets dumped in one big heap.Dave.

author: Bored@Work
author_rank: Super Contributor
timestamp: March 20, 2012, 10:57:32 pm
content: Quote from: EEVblog on March 20, 2012, 09:50:57 pmYes, all those industry rags have horrible websites. EDN, Electronic Design, ECN, T&M all have completely mad websites and no clue how to publish on the web. EDN, for example just managed this year, for the first time in their website's history, to publish schematics directly embedded on the same page of an article, and not just as links. Electronic Design still doesn't manage to do this and just posts a kind of thumbnail gallery. Ho, ho, ho.QuoteThey do have separate pages per author, too. E.g.http://www.ecnmag.com/tags/Blogs/M-Simon/But I have yet to find a journalist' pseudo blog worth following on any of these industry rag sites. It is just so obvious they deliver the number of words/week they are contractually obliged to deliver, and don't write blogs because they love it. Even those who have something to say have so much filling material in their pseudo blogs that I prefer not to read any.
EEVblog #46 - Page 1
Forum section: electronics / general

author: Greg323i
author_rank: Contributor
timestamp: March 12, 2012, 05:21:41 am
content: I've just spent a week or two watching all the videos after finding the EEVblog. With the review on the Gossen Metrawatt XTRA, and Dave's enjoyment of the switch, I remembered that I have a 25 year old DMM branded BBC Goerz Metrawatt, model M2012. I've been searching for information about it on and off for years (decades?). I contacted Gossen in Germany and they were able to send me a manual for the meter (in German as they didn't have any English) in less than 36 hours! I'm impressed. I plan on translating this in to English and sending them a copy so they might be able to help out anyone else that needs it.Btw, Dave is right... The Metrawatt selector is pornographic, even from the mid-80s!
#163 solder paste - Page 1
Forum section: electronics / general

author: n6nz
author_rank: Newbie
timestamp: March 07, 2012, 12:09:47 am
content: Hi,A gang of us have been working on a homebrew solder paste dispenser, using my friend's CNC mill (Mikini 1610L) and a manual paste dispenser (that I bought used on E-Bay), plus some mechanical & electronics & software hackery.Here's a short video from our first day of testing:It isn't working well yet for fine pitch TQFP pads, but was doing sort of OK for 0603 and SOIC pads.Your commercial unit in blog #163 is really interesting to watch. We have some questions:1) What is the granule size on the solder that you are using, or is there some specific solder that they recommend?2) What is the needle size?3) How small of a dot size can you get?4) It looks like the board is on a spring loaded holder and the needle contacts and deflects the board. Is that right? When is the paste dispensed -- before, during, or after, or <something complicated> the needle contacting the board?Thanks! Great blog!-dave

author: Psi
author_rank: Super Contributor
timestamp: March 07, 2012, 12:27:48 am
content: yeah, it seems the amount of paste is too much. need smaller needle and/or less pressure.

author: n6nz
author_rank: Newbie
timestamp: March 07, 2012, 12:35:41 am
content: The video was shot when we were still tuning a lot of things. We were able to get less paste. We tried a smaller needle, but couldn't get good solder flow, so I'm wondering if we had too large of granulate? Pressure was set to about the max of the unit's spec.The biggest issue was getting consistent results. It's hard to tune when things aren't consistent. As you can see from the video, the PCB was clamped in a milling vise, so we didn't want to crash the needle into the board. The commercial unit in Vlog #163 looks like it has a spring loaded board holder and the needle deflect the board. I'm wondering if we need to knock out a spring loaded jig.
EEVblog #252 - Multimeter Ohms Overload - Page 1
Forum section: electronics / general

author: IanB
author_rank: Super Contributor
timestamp: March 03, 2012, 06:37:08 pm
content: Love the follow up video on overload recovery with different meters. Looks like the Agilent still has some details to work on to catch up with the Fluke. Although I've never feed 240 V into the ohms range and I'm never likely to. I always check and double check the meter setup before I go anywhere near dangerous measurements.Also I'm surprised none of the meters gave a "beep beep beep" alarm signal when exposed to an overloaded input like that. It would seem like an obvious design feature to incorporate.

author: Neilm
author_rank: Super Contributor
timestamp: March 03, 2012, 11:01:08 pm
content: Quote from: IanB on March 03, 2012, 06:37:08 pmIEC61010 says that they should be safe - not necessarily report an issue. Though to my mind they shouldNeil

author: free_electron
author_rank: Super Contributor
timestamp: March 04, 2012, 05:46:58 am
content: i think this has something to do with a special feature in the agilent.the agilent machine can actually measure ohms while a voltage is present !Here is an example : you have a ground wire coming from a machine. Let's say there isa problem with this ground wire ( loos / bad connection ) and the resistance is around 40 ohms.. Due to leakage in the machine there will be a voltage present across this wire.Attempt to measure the 'resistance' and it is possible that the meter says : very low. simply because the measurement is upset due to the voltage drop across the cable.The agilent meter WILL give a correct reading . That particular model that dave has has this special feature built in. (Qik-V and Smart-Ohms)The way it works is that they switch the ohms current source off and sample the incoming voltage, store it in a cap and then pull off sime trickery ..by 'force-feeeding' 220 into the meter in ohms mode i suspect that there is so much residual charge in this sampler that it simply takes a long time to bleed off.I suggest the following test :switch the meter out of auto range and into the 400 ohms range. activate the dual display ( so the temperature goes away and a voltmeter or ampere meter appears ). now do the test again...This is a measurement technology not present in any other manufacturer.
EEVblog #250 – Anti-Static Mat Myth - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: March 01, 2012, 09:31:06 am
content: Great video Dave and thought provoking as usual. I have just tried to measure my anti-static mat and some of those anti-stat bags, the grey ones. I used a megger meter at a thousand volts got no reading at all even on the bags it was only when I ghot the probes to within half a milli meter that tracking across the surface occurred.
RSS Feed of new episodes (for HD download) - Page 1
Forum section: electronics / general

author: Chet T16
author_rank: Frequent Contributor
timestamp: February 16, 2012, 08:04:53 pm
content: Is there anyway of getting an RSS feed of the new episodes with links HD (720p) video?All i can get at the minute is 480x270 video fromhttp://www.eevblog.com/feed/(the little link at the top right)Using the feedburner link (the one in the right sidebar) gets me videos that won't play on my player (will need to check what formt they are, i thought it was m4u but that can't be rightUsing the youtube rss feedhttp://gdata.youtube.com/feeds/api/users/EEVblog/uploadsdoesn't get me any video links at all

author: Chet T16
author_rank: Frequent Contributor
timestamp: February 21, 2012, 09:41:50 pm
content: I've had no luck with this so farDid I see a server a while back that was used for backing up vids? Anyone have that link?

author: EEVblog
author_rank: Unknown
timestamp: February 21, 2012, 09:56:25 pm
content: There are no HD video files available. If you want HD you have to watch through Youtube.eevblog.org/video carries only the 480x270 version, this podcast version is designed for people with iPhones etc, hence the smaller sizeDave.

author: Chet T16
author_rank: Frequent Contributor
timestamp: February 21, 2012, 10:12:20 pm
content: Jdownloader can pull the HD downloads from a youtube link but I was looking to automate it. My media server will automatically download from an rss feed which would make things easier.I'm sure a script could pull the links and output an rss feed of them, i'll look into it and see if I can get something running.BTW I finally watched a few vids in HD on the tv (usually I'm stuck with 320p on my netbook) and the picture quality from that camera is amazing

author: EEVblog
author_rank: Unknown
timestamp: February 21, 2012, 10:54:00 pm
content: Quote from: Chet T16 on February 21, 2012, 10:12:20 pmActually, I'm not that happy with Youtube's HD quality these days, they seem to have throttled it back a notch. The original rendered HD video I upload is very noticeably better quality.Dave.
ANY OPINIONS ON ATTEN 5010 0R 6010 FOR RF WORK - Page 1
Forum section: electronics / general

author: jason695
author_rank: Newbie
timestamp: February 11, 2012, 10:17:13 pm
content: hi everyone,thanks for reading this topic.its as the title says, does anyone have any opinions on this spectrum analyser. the Atten 5010 goes to about 500mhz & can be extended to 1ghz. i know a used HP would be very good and highly reccomendable but, its the cost obviously. im measuring harmonics & power levels from small oscillators, they've probably got power levels up to say 10mW at most & studying frequencies from about 30 - 100mhz.advice here much appreciated.again thanks,jason