hybridfree/eevblog-posts huggingface dataset:
Is there a list of Dave's blogs apart from on YouTube? - Page 1
Forum section: electronics / general

author: Chris Wilson
author_rank: Super Contributor
timestamp: February 11, 2012, 04:33:58 pm
content: Does this forum or anywhere else have a list of Dave's blogs and their subjects, with links to YouTube? So you could just browse a whole list in one place and then jump to something of interest via a link? Thanks. I have only been able to see them by logging on to YouTube and browsing his channel, IYSWIM?

author: BravoV
author_rank: Super Contributor
timestamp: February 11, 2012, 04:36:28 pm
content: http://www.eevblog.com/episodes/

author: Chris Wilson
author_rank: Super Contributor
timestamp: February 11, 2012, 06:29:43 pm
content: Thanks for that, not sure how I missed it, but bookmarked now.
Documenting the LAB PSU - Page 1
Forum section: electronics / general

author: mtkaalund
author_rank: Contributor
timestamp: March 06, 2012, 04:54:50 am
content: Hi Dave,I was thinking about, now that you have a page on the webpage, dedicated to projects, I would be cool if you made a page with the specs of the design for you LAB PSU project.Perhaps you could include some of your results as you make it further in the process of debug HW/SW?regards. MTKaalund

author: EEVblog
author_rank: Unknown
timestamp: March 06, 2012, 08:05:50 am
content: Yep, that is the intention.Dave.

author: mtkaalund
author_rank: Contributor
timestamp: March 06, 2012, 08:29:59 am
content: He he, perhaps I did not make my question quite clear (too little sleep and not enough coffee), what I meant making the project page now (<-- want another word, can not find it in my thoughts).Where you can make an update to it, perhaps an FAQ to the project, as I go though the pages of the forum,I can see that many of the questions are the same and I just thought it could save you some time.But I think your video posts are quite good, and I am looking forward to the next update on you LAB PSU kit making project.

author: EEVblog
author_rank: Unknown
timestamp: March 06, 2012, 09:28:14 am
content: I know, my answer was deliberately non-committalDave.
Manufacturing specialty cables just like specialty boards - Page 1
Forum section: electronics / general

author: kiyotewolf
author_rank: Contributor
timestamp: February 03, 2012, 01:52:30 am
content: I debated using the general section, but..I'd love to see you cover this Dave.You've got a custom project, and it's got all it's inputs and jacks, and whatnot, and it connects to something at the other end, .. piece of equipment, some Joe's computer back panel..How do you get your custom cable, built to order, with all the strain relief you want, the fancy dongle looking end, where it splits into finer cables, and then off to particular plugs of various kinds?A working example would be..::::Just the other day, I was using a retro computer, TI 994/a, and, my audio interface cable was MIA.Got the parts, followed the diagram, but on a professional point of view, it's stuff hacked together, held together with tape.How, where, would I go, to get something, which is not an exact copy or even a duplicate of the original cable, but a new cable, which happens to have the same wiring?And this example, would be for any project really, not just rebuilding retro computers, with brand new cables from the 80's.~PaulThis has been bugging me for quite awhile, and I'd love an answer, or even better, a video.

author: Short Circuit
author_rank: Frequent Contributor
timestamp: February 03, 2012, 02:36:32 am
content: This is quite simple actually; you draw a diagram of the wanted cable assembly. Usually as if laid out on the table with connectors and wiring as if it was a normal schematic. Added to that the wire sizes, lengths of segments, requirements for shielding, drainwires, cable impedance, UL rating, connector partnumbers, probably references to other drawings (such as specific strain relief designs).Then you find a selection of cable manufacturers (usually China these days) that seem ok, and ask for quotations. You find these on alibaba or globalsources, and browse their online portfolio for similar cable assemblies as what you want to make.Of course you need to have quite a few to justify this route. Usually, the MOQ is 1000 assemblies or thereabout, and in case of custom raw cable (so the cable is build exactly to your spec), and additional MOQ of 3000 meters or thereabout. But often, it's no biggie to negotiate a somewhat smaller MOQ, especially with first order.In the attachments is an example of a USB cable assembly that I have in the making at this moment.Just a simple drawing of the connections, of the desired packing and a custom strain relief (with last page suppliers' drawing of the sr for mould making).Costs for such a project are $509 for mouldmaking and sample production and $2.27 each for production of 1000pcs.

author: kiyotewolf
author_rank: Contributor
timestamp: February 04, 2012, 07:07:22 am
content: Make a run of TI 994/A cassette interface cables, and sell them till I get old and grey.~PaulThanks for the info! Are there, any other ways, of getting smaller runs of custom cables?
EEVblog #171 - Agilent U1272A Multimeter Teardown - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 22, 2011, 04:22:35 pm
content: Great Job Dave ..I am a lover of quality , and after viewing an such teardown, I am also impressed .Congrats

author: Fox
author_rank: Regular Contributor
timestamp: May 24, 2011, 12:09:31 am
content: Yes very impressive construction.I would like to take a look at the schematics, but i doubt that there is any chance.Intrestingly the Agilent U1241B 200€ meter uses the same 24bit ADC, so the number of Bits of the ADC is not everything.e.g. The Fluke 28II uses the 20Bit LTC2035 and has about the same specs as the U1272.And.. Great Job Dave as always

author: Geir Tore Simonsen
author_rank: Newbie
timestamp: February 03, 2012, 07:59:00 pm
content: Just a word of caution for anyone considering ordering this meter:Based partly on this teardown and the response/firmware update I decided to buy a U1272A a few days ago. I was very surprised when I got home with it, and without touching a screw or even inserting the batteries I could pull it open at the top without using almost any force with my bare hands. The rest of the meter felt solid, but at the top it just felt cheap and flimsy - not at all what I expected after watching this video, especially at the 2:35 mark.I went back to the store the next day to get a replacement, but the other meter they had in the store was just like the one I got. Not sure what's going on, but I would never buy this meter without being able to check it out in the store before buying. I just got a refund and continued to consider options.I don't know much about multimeters and electronics in general, but I needed a multimeter with logging capabilities in order to find a non-constant current drain on my car battery. After the disappointment over the Agilent, I decided to buy a Fluke 287/FVF instead that I just brought home. Way more expensive than what I was looking for initially even though it was discounted due to being replaced with an upgraded version, but at least I feel confident that it's a good piece of equipment.

author: saturation
author_rank: Super Contributor
timestamp: February 03, 2012, 10:47:03 pm
content: I also reviewed this DMM and couldn't find this problem; however, that was a while back at the time of its introduction. I wish you had taken videos of the problem to bring it to Agilent's attention.Quote from: Geir Tore Simonsen on February 03, 2012, 07:59:00 pm

author: Geir Tore Simonsen
author_rank: Newbie
timestamp: February 04, 2012, 12:42:27 am
content: Unfortunately I didn't think of documenting it until after I had returned it, but I suppose the store (Elfa Distrelec in Norway) will return it to Agilent so they get the word that way. It's really a shame, I think the feature set was pretty good considering the expected build quality and price compared to the alternatives.
Lecroy 9384C Oscilloscope  - Page 1
Forum section: electronics / general

author: FreeThinker
author_rank: Frequent Contributor
timestamp: January 23, 2012, 04:43:31 pm
content: Any further updates on the repair of the scope Dave?

author: radiopierre
author_rank: Newbie
timestamp: January 26, 2012, 12:25:23 pm
content: Hello,Can I add to this site, questions and advice for 9310 am video board issue ?
lecroy 9310am (video board problem) - Page 1
Forum section: electronics / general

author: radiopierre
author_rank: Newbie
timestamp: January 26, 2012, 09:33:45 am
content: Hello all , I am new to this blog and wish to all best for 2012 ( its not too late).I have a Lecroy 9310am and when i powered the scope the first time the video board( EC-0813030B-4) Resistor R313 blew i changed the resistor and verify the capacitor C308/310/305 its all ok. i have received the service manual but have not found any schematic of the video board in order to verify what else would be defect, but was not able to view the specific schematic . I have verified with someone in germany who had the same scope and - video board and that work perfectly with my scope . I wonder if anybody had same experience and or detailled schematik for that little video board or any tips that could fix it. Appreciate any help regards . Pierre
Dave, don't forget to update video copyright text to 2012 - Page 1
Forum section: electronics / general

author: wilfred
author_rank: Super Contributor
timestamp: January 19, 2012, 10:48:51 pm
content: .

author: Unknown
author_rank: Unknown
timestamp: January 19, 2012, 11:21:08 pm
content: Quote from: wilfred on January 19, 2012, 10:48:51 pmYes, this is important, because now his videos are only copyrighted until 2061 or so, instead of 2062(not sure about exact copyright terms in Oz, and it's likely to change before that time, like in the US).

author: Mechatrommer
author_rank: Super Contributor
timestamp: January 20, 2012, 12:24:53 am
content: Quotewould like to add... dave pls check your autofocus function. slow refocus near<->far object bothers me :-|

author: McMonster
author_rank: Frequent Contributor
timestamp: January 20, 2012, 03:23:31 am
content: Quote from: Mechatrommer on January 20, 2012, 12:24:53 amYes, autofocus is annoyingly slow, you loose some close ups completely on videos.

author: EEVblog
author_rank: Unknown
timestamp: January 20, 2012, 09:42:56 am
content: Quote from: McMonster on January 20, 2012, 03:23:31 amI'm not sure what I can do with that, I have a top of the range Canon HF G10 which even has dedicated fast autofocus sensor.Dve.

author: Mechatrommer
author_rank: Super Contributor
timestamp: January 20, 2012, 01:57:16 pm
content: Quotethere's the problem. top of the range performs worst than low fo the range. i suspect either lemon camcorder or user/setting error. please check in the menu if anything related to autofocus you've accidentally set such as focus area, priority, mode etc. i noticed your camcorder tend to stick to the focus of the previous/farther object such as background at the side/top of the picture/frame or reflection of lamp from lcd screen. iirc in quadcopter video.edit: and try to play around such as tapping the manual focus ring (slightly rotate) while shooting, if it helps redirecting focus point.
Security issue on eevblog.com - Page 1
Forum section: electronics / general

author: azrimola
author_rank: Contributor
timestamp: January 17, 2012, 11:20:47 pm
content: Hello,if you visithttp://www.eevblog.com/page/2/and have a look at the bottom link pointing to either "« Older Entries" or "Newer Entries »" you will see that there is an extra URL parameter appended to both of the links.One example of such link is:http://www.eevblog.com/page/3/?file=..%2F..%2F..%2F..%2F..%2F..%2Fproc%2Fself%2Fenviron%00This at least indicates a failed attempt of running an exploit described here:http://www.thesecuritysamurai.com/2011/02/24/the-procselfenviron-vulnerability-by-cesar-salas-stillsecure-soc-analyst/

author: EEVblog
author_rank: Unknown
timestamp: January 18, 2012, 12:45:08 am
content: ThanksYes, I am aware of this and need to look into how to fix it.Dave.
New User and Blog I'd like to see - Page 1
Forum section: electronics / general

author: CraigHB
author_rank: Regular Contributor
timestamp: January 03, 2012, 01:18:25 am
content: Hi folks, just registered here.Love the blogs, any chance we'll ever see a $200 multimeter shoot-out?

author: EEVblog
author_rank: Unknown
timestamp: January 03, 2012, 01:31:23 am
content: It was considered at one point.Hard to find suitable players in that market I suspect...Dave.

author: CraigHB
author_rank: Regular Contributor
timestamp: January 03, 2012, 08:46:55 am
content: True, there's not a whole lot of them, but would love to see how the ones out there stack up. I just bought one myself, but was flying blind. Is the Protek 608 any good? how about the BK 390A. Would I prefer a 20k or 40k count over a 6k count? When they say .03% accuracy is it really .03%? Ended up buying an EX520. It's in the mail, hopefully I'll be happy with it. Couldn't decide if the 40k count and higher accuracy of the EX530 was worth it or not. Didn't know anything about the Protek, never heard the brand, but looked good. Maybe the BK Precision would have been better. Needed to see a shootout.

author: IanB
author_rank: Super Contributor
timestamp: January 03, 2012, 09:11:44 am
content: Quote from: CraigHB on January 03, 2012, 08:46:55 amI bought a Protek 6500 (I think the 608 is discontinued). It is nice enough, but whenever I'm using it a little voice is going through the back of my mind, "it's not a Fluke". I might end up getting a Fluke at some point just to compare with, which defeats the object of buying a lower cost meter in the first place.The main problem I see with the Protek is the lack of certainty and traceability of the calibration. There is no published information about the calibration procedure and no calibration certificate with the meter. There's a reason Fluke meters cost more, and that's one of the reasons.Having said that, the accuracy appears to be within spec from the testing I have done, and the only niggle is a small zero offset on the volt ranges.

author: EEVblog
author_rank: Unknown
timestamp: January 03, 2012, 09:39:28 am
content: There was a bit of interest in 200,000 count meter shootout, I think they are mostly around the $200 mark.Dave.
EEVblog.org  - Page 1
Forum section: electronics / general

author: hitachi8
author_rank: Contributor
timestamp: December 31, 2011, 04:52:59 pm
content: hello,i was about to go on the blog when i suddenly mistyped eevblog.ORG instead of .COM.i found a website made of extremely simple HTML webpage (directory type) that contain stuff from the blog.so i was wandering... is that normal? just to let Dave know about it.here's some snapshot (247Kb):Edit: OK, i just found some older post from Dave, apparently this is his Video backup website, or something similar.

author: Armin_Balija
author_rank: Regular Contributor
timestamp: December 31, 2011, 06:55:08 pm
content: Are all those episodes downloadable?

author: shebu18
author_rank: Frequent Contributor
timestamp: December 31, 2011, 07:13:24 pm
content: Teoretical yes, but under every episode on the blog you have a download link.

author: ivan747
author_rank: Super Contributor
timestamp: December 31, 2011, 09:19:04 pm
content: Quote from: Armin_Balija on December 31, 2011, 06:55:08 pmSounds like you are one of the viewers who wants to watch the episodes on an MP3 player. Just right click and click "Save As", as usual.

author: EEVblog
author_rank: Unknown
timestamp: December 31, 2011, 11:22:52 pm
content: Yes, that is normal.eevblog.org is what hosts my podcast video files on another (shared) server (where I have unlimited space).The .com website and this forum and wordpress blog are hosted on my dedicated server.Yes, you can download directly from there if you want, no different to right clicking Download on the blog site.Dave.

author: PedroDiogo
author_rank: Regular Contributor
timestamp: January 01, 2012, 04:32:29 pm
content: Quote from: EEVblog on December 31, 2011, 11:22:52 pmIf that's the case why not redirect people from EEVBlog.org to EEVBlog.com ?

author: EEVblog
author_rank: Unknown
timestamp: January 02, 2012, 11:35:43 am
content: Quote from: PedroDiogo on January 01, 2012, 04:32:29 pmI could, but it's actually convenient for me to grad the URL from when making the blog post!Dave.
EEVblog #231 - 2011 - Page 1
Forum section: electronics / general

author: caroper
author_rank: Regular Contributor
timestamp: December 31, 2011, 03:57:28 pm
content: All the best for 2012 Dave, I hope your gambles all pay off.I have enjoyed your Blog and forums for the sort time I have been a member and look forward to many pleasant and educational hours in 2012 following your adventuresAnd to my fellow formalities HAPPY NEW YEAR or in my languagevoorspoedige nuwejaarCheersChris

author: Armin_Balija
author_rank: Regular Contributor
timestamp: December 31, 2011, 07:01:44 pm
content: Aye, cheers! Click the ads people! Sagan needs more toys!!
UI improvement - Page 1
Forum section: electronics / general

author: Greg J
author_rank: Regular Contributor
timestamp: December 30, 2011, 09:47:50 pm
content: I just watched an episode in here:http://www.eevblog.com/2011/11/28/eevblog-221-lab-power-supply-design-part-1/And now I want to see the next episode, or just next blog episode (whatever) - but there is no control to just jump ahead.Pita.

author: shebu18
author_rank: Frequent Contributor
timestamp: December 30, 2011, 10:02:00 pm
content: http://www.eevblog.com/2011/11/29/eevblog-222-lab-power-supply-design-part-2/http://www.eevblog.com/2011/12/03/eevblog-224-lab-power-supply-design-part-3/http://www.eevblog.com/2011/12/07/eevblog-225-lab-power-supply-design-part-4-pwm-control/Here you go.

author: Unknown
author_rank: Unknown
timestamp: December 30, 2011, 10:03:12 pm
content: I'm surprised that Youtube doesn't have a concept of next/previous episode. Of course there are workarounds like video replies or playlists. Maybe they want to discourage splitting long videos (eg. movies) up in 15 minute segments to avoid the time limit for non-partners?You could watch thePower Supply Designplaylist, although it's in reverse order for some reason. The second episode is actually linked from the description of the first video on Youtube, but the third and fourth are not. I guess it's a pain to go back to the previous episode and add the link.As for watching from eevblog.com, it's just embedding Youtube, so I'm not sure if Dave should spend the time trying to make it more like Youtube.

author: Psi
author_rank: Super Contributor
timestamp: December 30, 2011, 10:16:29 pm
content: There used to be a youtube bug which meant the 'order by date' button for video channels didn't work. (It did do something, but it wasn't putting them in order)But since the new layout updated recently the bug has been fixedSo if you click on the EEVBLOG youtube channel and select VIDEOS.Then you can see all the EEVBLOG videos in forward or reverse order right back to the first rigol videohttps://www.youtube.com/user/EEVblog/videos

author: EEVblog
author_rank: Unknown
timestamp: December 30, 2011, 10:18:25 pm
content: There is a Youtube based hot link on the end screen of every video linking to the next one.Click on the "to be continued" graphic.Plus the playlist, plus the URL link in the video text.So plenty of ways to find the next episode.Dave.

author: Greg J
author_rank: Regular Contributor
timestamp: December 31, 2011, 03:15:10 am
content: Simple back/forth linking on the site would be nice tho.I'm watching movies in html5 mode (flash is a royal pita!) - so I don't think the 'to be continued' is clickable
Dave gets featured on Hack-a-Day, again. - Page 1
Forum section: electronics / general

author: ivan747
author_rank: Super Contributor
timestamp: December 13, 2011, 12:27:37 am
content: This time is a solar panel hack. Mathieu was interested in using some solar cells indoors. He probably watched Dave's "Solar Panel Hope" video. He built a development board to test the performance of his identical solar cells. He also charged a lithium cell, as well as drive a load.http://hackaday.com/2011/12/12/crunching-the-numbers-using-solar-cells-indoors/

author: ivan747
author_rank: Super Contributor
timestamp: December 13, 2011, 01:50:37 am
content: The chip used in the article looks interesting. I will save the datasheet for further reading.http://www.ti.com/lit/ds/symlink/bq25504.pdf
DS1052E as Serial Object - Page 1
Forum section: electronics / general

author: y33t
author_rank: Contributor
timestamp: December 09, 2011, 12:32:15 pm
content: Hi all,Is it possible to make PC recognize DS1052E as serial com object ? Some vendors provide drivers for this but didn't come across for Rigol.

author: olsenn
author_rank: Frequent Contributor
timestamp: December 09, 2011, 01:17:49 pm
content: The DS1052E is LXI compatible and you can manipulate it with VISA librariues from NI. Alternatively to using LabView, Rigol makes their own application for communicating with their devices called UltraSigma. The programming commands can be found in the datasheet for your scope.As for raw serial comminication, I can't see why it wouldn't work. There is a serial port on the device, and the hack, made popular on this website, to convert the DS1052E -> DS1102E was origonally done using a com terminal. Were you looking to connect the device from its RS232 port, or did you want a USB-to-serial type thing like what you'd get with a FTDI chip?

author: y33t
author_rank: Contributor
timestamp: December 09, 2011, 02:11:57 pm
content: Quote from: olsenn on December 09, 2011, 01:17:49 pmI intend to use the usb interface for a serial connection like they did with an Instek here ;http://www.mathworks.com/matlabcentral/fileexchange/31371-retrieve-data-from-instek-oscilloscope-via-matlab-serial-interfaceThere is a 5.5mb download at the top-right of the page, there is a pdf file inside the archive and it seems that they can introduce the DSO as a serial object. I would like to achieve this because I had already written the script for serial data acquisition. To do this over USBTMC I need to rewrite the code - which seems that I have to in case I can't find a similar workaround as above.

author: ivan747
author_rank: Super Contributor
timestamp: December 09, 2011, 10:21:58 pm
content: Why don't you just use a $10 USB to RS-232 adapter? I think the Rigol outputs waveform data via RS-232. If it doesn't, you are on your own.
EEVBLOG #220 Kindle Fire Review - Page 1
Forum section: electronics / general

author: gordo51
author_rank: Contributor
timestamp: November 27, 2011, 09:40:36 pm
content: I picked up my Kindle Fire yesterday, Nov 25, and wouldn't you know it, Dave has done a review. I have been using is for a few hours yesteday and today and I have to say it seems to be a bit quirky but maybe I just need to figure it out. I am in Canada so no Kindle Fire here but I had mine shipped to a nearby US postal address. I have the same problem with trying to buy anything, No Go at this time. If I could have bought a few things I would have so it does seem like a poor idea to not have every place up and running but I guess they wanted to rush this out for Christmas and there just was not enough time to get every country operational. I am going to San Diego for two weeks at Christmas so it will be interresting to see if it lets me buy stuff while down there. Basically all I can use it for is Web browsing which is actually what I had in mind, something bigger than my Blackberry but smaller and easier to use than my laptop. Web browsing seems pretty fast and I have not had a problem with signal strength in several locations including my brother's detached garage which gets a signal from the house.I watched three EEVBlog videos yesterday and they played very well except the first time I tried the unit totally locked up. I could not get it to respond to any taps anywhere. I had to hold down the power button to shut it off. When I turned it back on everything was fine. Another strange thing it was doing is going from a web page I was viewing back to the home page. I then had to tap on the page to open it up again but it went back to home page after a few seconds. Closing the page and starting over again stopped this behavior. At first I could not figure out how to search in the Oxford Dictionary, not that I plan to do that much, but eventually noticed the magnifying glass in the bottom right corner. It seems to search really slowly though. You would thing there would be a setting to slow down that carosel? So far I'm not dissapointed as it does browse the web quite well. Eventually I expect to be able to buy stuff and I may go for some music and apps.Interested to hear what others have experienced.cheers,Gordon
EEVBLOG #76 - Publish and be damned - Page 1
Forum section: electronics / general

author: x86opcode
author_rank: Newbie
timestamp: December 05, 2011, 10:15:35 pm
content: I've been watching these episodes for a while and surprised I hadn't known about this YouTube blog until recently.I was rather surprised to know people had been upset you (Dave) had "missed areas" or need more explanation. All I can say is Good job, Dave. With all the resources available on the Internet, I have found it very educational to watch this blog. I think it's perfectly fine to not describe every little aspect of every theorem, idea, principle, etc. It's fun to pause the video and go look up information on what I don't know. I even take notes on these blogs. It's fun to go search out the information and learn more. It's fun to see Dave, with the professional experience he has, to just simply draw out these circuits and talk about what's going on. It's awesome.My suggestion would be if something didn't make sense, the person pause the video and go read up on it.Good job, Dave. You've done great. Awesome video blog.Have a good one.Drinking a beer for you here.Tim

author: EEVblog
author_rank: Unknown
timestamp: December 05, 2011, 10:21:23 pm
content: Thanks.Even if I did plans things and script my blogs, and carefully check and review and refine them, then I still wouldn't be able to satisfy everyone, and cover every detail. And then you get the people who complain about the video being too longUnwinable - sounds like most jobs I've hadDave.

author: wkb
author_rank: Super Contributor
timestamp: December 05, 2011, 10:24:52 pm
content: Whatever you do these days, there will be whiners on the web. SNR going way downhill there.Just ignore them, you can't please the world anyway!
EEVblog #218 – Manly Warringah HAM Radio Society - Page 1
Forum section: electronics / general

author: JonnyBoats
author_rank: Regular Contributor
timestamp: November 29, 2011, 10:36:39 pm
content: Being a ham (WA1KLI), I was pleased to see Dave visited the Manly Warringah HAM Radio Society.I was a little disappointed that we didn't get any video of their antennas so I would like to share this youtube link:with a catchy song about ham radio and a rather nice antenna tower.Hams in Australia have a proud history of being involved in cutting edge research going back to the inception of ham radio.Dave, if you get a chance I would love to see more video showing hams down under. Perhaps you could show one of the many hams there who routinely bounce signals off the moon along with video of their antennas?

author: DrGeoff
author_rank: Frequent Contributor
timestamp: November 29, 2011, 11:19:59 pm
content: An old work colleague of mine used to be very active in the ham shack up there in Terrey Hills. You didn't bump into Phil up there did you Dave?

author: Unknown
author_rank: Unknown
timestamp: November 30, 2011, 05:46:04 am
content: Quote from: JonnyBoats on November 29, 2011, 10:36:39 pmIt was in this country, that the cotanger antenna was invented by famous radio operator and then Yaesu agent Richard Smith (OAM).Thousands of cotanger antennas are pressed into service daily, both in Australia and overseas.

author: amspire
author_rank: Super Contributor
timestamp: November 30, 2011, 05:58:54 am
content: Cotanger? Is that the same as a Coat Hanger antenna?

author: BravoV
author_rank: Super Contributor
timestamp: November 30, 2011, 06:05:03 am
content: Quote from: amspire on November 30, 2011, 05:58:54 amHuh ? You meant like this ?

author: vk6zgo
author_rank: Super Contributor
timestamp: December 03, 2011, 12:42:57 pm
content: I believe dear old Uncle was jesting,referring to the habit of some sections of the community (Google for "Bogans"),"temporarily" replacing broken car radio antennas with bent coathangers.The owners often show their artistic talent,with many of these coathangers bent into fantastic shapes,such as maps of Australia (minus Tasmania),kangaroos,flowers,etc.Coathangers are also useful for unlocking your car if you locked the keys inside,or someone else's car if you are of a criminal bent.(Or,at least they were with older cars)VK6ZGO
EEVBlog #46 / #173 - The power of Dave - Page 1
Forum section: electronics / general

author: sradtke
author_rank: Newbie
timestamp: November 27, 2011, 08:52:44 am
content: It is interesting to see how much influence one person can have on a mail order shopfar far away. One of the bigger mail order shops here in Germany has added DMMs fromGossen Metrawatt to their catalog. And yes you guessed it, amongst the four devicesare the Metrahit X-tra and the Metrahit Energy. I guess a lot of people seen the video blogsand asked them to add these to their portfolio. Well done Dave! Or as you would say 'beauty!'

author: Neganur
author_rank: Unknown
timestamp: November 27, 2011, 11:05:43 pm
content: They still try to get rid of those UNI-T scopes though *giggle*I've got to say, I'm impressed. It's one of the only stores I still buy from even though I don't live in Germany any more.
EEVBlog #212 - resistors in series/parallel - Page 1
Forum section: electronics / general

author: alexwhittemore
author_rank: Frequent Contributor
timestamp: November 23, 2011, 03:36:57 am
content: I agree that, assuming the limits of the resistor tolerance, you proved that the end series equivalent resistor tolerance will definitely be within the same tolerance. However, you didn't note that you'll statistically improve tolerance by using a bunch of resistors in series. I'm not sure that there's anywhere that it's practically applicable, but imagine that I have 1 million 1ohm 1% resistors, and one 5% 1Mohm resistor. It's certainly possible that the 5% resistor will be spot on, but given that you've effectively averaged a million 1% resistors which are, on average, perfectly spot on accurate, the chain has better tolerance!Of course, a million 1ohm resistors is a bad example, since contact/joint/lead resistance will begin to dominate the error.

author: slateraptor
author_rank: Frequent Contributor
timestamp: November 26, 2011, 11:03:32 am
content: Quote from: alexwhittemore on November 23, 2011, 03:36:57 amThere appears to be a bit of cheating going on here.

author: ejeffrey
author_rank: Super Contributor
timestamp: November 26, 2011, 11:28:50 am
content: Also, as dave showed, the mean error is not necessarily zero. This is to be expected -- when you build a setup for manufacturing and testing 1% resistors, you are going to specify that the meter used to measure them is calibrated to 0.1%. There are other systematic errors both fixed and temperature/time dependent that may also be another 0.1% (or so). This means that every resistor from a batch, the same factory, or even the same manufacturer will have a slight average bias. Furthermore, someone pointed out in the other thread that the manufacturer may deliberately target a point slightly below the nominal value to keep the resistor as accurate as possible accounting for aging and operating at elevated temperature.So 1 million resistors in series will average out the statistical errors in manufacturing, but it won't necessarily converge on the nominal value. The compound resistor will also be just as drifty as a single resistor made by the same technique. Real precision resistors need to be designed as such.

author: slateraptor
author_rank: Frequent Contributor
timestamp: November 26, 2011, 11:47:29 am
content: Quote from: ejeffrey on November 26, 2011, 11:28:50 amOh, how we so often fail to acknowledge our friend tempco. *Bows to ejeffrey*
Amazon Kindle Fire Tablet Teardown
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: November 23, 2011, 09:00:52 am
content: It seems like they wanted a removable sd card first?

author: EEVblog
author_rank: Unknown
timestamp: November 23, 2011, 10:31:32 am
content: I thought that for a second, but that's not like any SD card socket I've seen.3G module perhaps?Dave.

author: timelessbeing
author_rank: Frequent Contributor
timestamp: November 23, 2011, 11:25:22 am
content: Does the metallic tape simply shield what is directly beneath it, or does create a conductive link from the large shield to something else? If it's the latter, how did you restore it?

author: amspire
author_rank: Super Contributor
timestamp: November 23, 2011, 12:08:33 pm
content: Quote from: EEVblog on November 23, 2011, 10:31:32 amI suspect it is for a connector to an EEPROM emulator. I think the development time for the Fire was very tight, and I suspect the hardware had to be in production before the software was finished.Flashing the eeprom to test the final unit can be slow, and if there are bugs, unreliable, so it makes sense they test with a flash memory emulator.Richard

author: codeboy2k
author_rank: Super Contributor
timestamp: November 24, 2011, 05:29:44 pm
content: Quote from: amspire on November 23, 2011, 12:08:33 pmThe flash could be a disk-on-chip device (a flash module with an IDE interface) and the 40 pin connectionis for an external IDE hard drive only used during development, as Richard noted.
EEVblog #213 New Sydney hackerspace. - Page 1
Forum section: electronics / general

author: aargee
author_rank: Frequent Contributor
timestamp: November 20, 2011, 05:32:02 am
content: Dave,Just catching up on EEV Blog videos and saw the new Hacker Space you are organising - well done!!I was just wondering when it will be ready and how much subscriptions will be.It's a bit small, though, so I imagine it will be rather exclusive. You could start an outreach program to the public and run tours to see the latest and greatest in teardowns and the inside scoops on secret projects for un-named government departments!All with tongue firmly in cheek, of course!- Rob.p.s. if I join, I'll be looking for a discount as it's a long way to come from Queensland...

author: johnboxall
author_rank: Unknown
timestamp: November 20, 2011, 06:35:02 am
content: If anyone local to Sydney is interested, the real hackerspace is:http://robodino.org/
EEV Blog: 214 Commander Telephone Box tear down, what it might be. - Page 1
Forum section: electronics / general

author: Lawsen
author_rank: Frequent Contributor
timestamp: November 14, 2011, 08:13:58 pm
content: The Commander Telephone Box is most likely based on an old Samsung PBX telephone control box.http://www.pbxguru.com/pbx/samsung-nx.htmhttp://commanderphonesystemsserviceparts.street-directory.com.au/
How can i download EEVblog #137 ? - Page 1
Forum section: electronics / general

author: eddyman
author_rank: Newbie
timestamp: January 05, 2012, 01:48:29 pm
content: hi therethe "EEVblog #137 – BK Precision 879B Handheld LCR Meter Review"is not ready i cant download it from this link:http://www.eevblog.com/podpress_trac/web/1271/0/EEVblog137-BKprecisionLCR-480x272.m4valso i have no access to youtube.what should i do?

author: eddyman
author_rank: Newbie
timestamp: January 05, 2012, 01:52:46 pm
content: wooow ive found here :http://eevblog.org/video/
EEVblog #136 - Building an Electronics Storage Cupboard - Page 1
Forum section: electronics / general

author: krantz
author_rank: Newbie
timestamp: November 10, 2011, 03:53:01 pm
content: I dont know about the rest of you but I have been wondering what dimensions the boards are that Dave built for hes Electronics Storage Closet?I was also thinking about that this thread could be good to have just to talk about wood-builds.So, Dave - if youre reading this - Can you please give us, if you have them, the dimensions of your Electronics Storage Cupboards?Thanks!
DS1052E from Alpha Electronics - Page 1
Forum section: electronics / general

author: dmreese1
author_rank: Newbie
timestamp: November 08, 2011, 08:21:10 pm
content: Received my DS1052E yesterday from Alpha Elec. Unit was clean, no smells and had HW 58 and FW ...05.02........

author: ChrisKiwi
author_rank: Contributor
timestamp: November 09, 2011, 01:32:05 am
content: Be sure to try out the software on the CD, it seems to work quite well, though not had much time to try it out myself.
Missing video files. - Page 1
Forum section: electronics / general

author: PeterG
author_rank: Frequent Contributor
timestamp: October 01, 2011, 10:13:28 am
content: I have noticed the video files from 1 to 127 seem to be missing from the new server.Was this part of house keeping or lost somehow?Regards

author: McMonster
author_rank: Frequent Contributor
timestamp: October 01, 2011, 01:15:00 pm
content: There's also #101 where embedded video does not show up (Firefox 7, Adblock disabled).

author: sdscotto
author_rank: Contributor
timestamp: October 30, 2011, 08:45:35 pm
content: Any chance the missing videos will return?

author: EEVblog
author_rank: Unknown
timestamp: November 07, 2011, 04:44:24 am
content: The video files have always been there.http://eevblog.org/video/If you are talking about the RSS/iTunes feed, there is a maximum limit to the size of the RSS file, so it will only show the last NN posts.Dave.

author: PeterG
author_rank: Frequent Contributor
timestamp: November 07, 2011, 05:55:33 am
content: That ftp list works.However, the problem is withhttp://www.eevblog.com/episodes/For example, if you go tohttp://www.eevblog.com/2010/07/11/eevblog-99-100-multimeter-shootout-extech-amprobe-bk-precision-ideal-uei-uni-t-part-1of2/the 'Download' link points tohttp://www.eevblog.com/podpress_trac/web/866/0/EEVblog99-480x272.m4vand produces a "File not found' error.Same appears to apply for videos 1 to 127.Regards

author: EEVblog
author_rank: Unknown
timestamp: November 07, 2011, 06:07:34 am
content: Oh, ok, I know what went wrong.I switched to using eevblog.org/video instead of eevblog.com/video around that time.Will upload those files back to the eevblog.com server.Dave.
Strange noise on hacked Rigol DS1052E - Page 1
Forum section: electronics / general

author: Mat
author_rank: Contributor
timestamp: October 26, 2011, 08:49:37 pm
content: Hi everyone!Several months ago, I bought a DS1052E from a local guy. The scope was new but he sold it to me already hacked to 100Mhz. I didn't do anything regarding firmware update and the scope worked fine for everything I used it (very low speed stuff <200kHz).Today, I wanted to view a 1Mhz sine wave and noticed that when I go from 500ns/div to 200ns/div, there is suddenly a lot of noise on both channels (more on channel 1 than channel 2).The amplitude of this noise doesn't depend on the vertical attenuation (see pics). Each channel was 50Ohm terminated and DC coupled. When zooming further on the horizontal axis, it looks like the noise is some sort of 100Mhz signal.I would be very grateful if anyone could share any ideas about what could be the cause of this noise.Scope : DS1052E hacked to DS1102ESoftware version : 00.02.04.00.03DSP : 02.20FPGA : 02.00HardVersion : 58Thanks in advance,Mat

author: drieg
author_rank: Regular Contributor
timestamp: October 26, 2011, 09:55:52 pm
content: Firmware 00.02.04.00.03 doesn't support your HW58 (check here), update to 00.02.04.01.00 or later...

author: Mat
author_rank: Contributor
timestamp: October 27, 2011, 07:55:23 pm
content: Problem solved, thanks!! Didn't think my problem was similar to the calibration issues mentioned in the post about the dark side of the hack. Apparently it was!For future reference, what I did :- update from 00.02.04.00.03 to 00.02.04.01.02- self calibrateM.
EEVblog #211 IET Wide Range Resistance Box - Page 1
Forum section: electronics / general

author: Conrad Hoffman
author_rank: Super Contributor
timestamp: October 28, 2011, 07:56:18 pm
content: FWIW, if you look at an old Julie Research 1 ppm Kelvin Varley divider, they used the same trick to get within tolerance- add a small piece of resistance wire to the lead of a resistor. My guess is that's what IET did on that one odd connection, though I have to agree, the entire construction isn't up to a really professional standard.

author: hacklordsniper
author_rank: Frequent Contributor
timestamp: October 29, 2011, 01:40:32 am
content: Im somewhat suprised at cost & construction detail on such expensive decade, it looks like mine altrough much cheaper is better.

author: ciccio
author_rank: Frequent Contributor
timestamp: October 29, 2011, 10:40:58 am
content: It is possible to build such a decade box with only 4 resistors per decade, using commercially available thumbweel switches, like those made by Crameda (I fear that they are expensive, being Swiss made...)The catalog is herehttp://www.crameda.com/pdf_files/eng/multiswitch/MS-U-E-060915.pdfYou need the version 632 (page 4) but beware that there is an error in the schematic : the 4 resistors' values should be 3R, 4R1Rand 1R, and not 3R, 4R,2Rand 1R as indicated.EDIT: the values shown on the data sheet do not result in the correct values when the switches are set according to the truth table, or at least this is what I get after filling two A4 pages with schematics.. If another member wants to show me where I'm in error, he's welcome.You need the values 3R, 4R, 2R and 1R if you want to have a total resistance value from 0 to 10, as shown at the end of Dave's episode #212, but a decade starts form 0 and ends at 9, value 10 is thesecondfirst one of next decade.. (and this requires a different switch arrangement)We used a similar construction for the thumbweel set-point selector of temperature controllers, but it was many years ago, when electromechanical components were cheaper..Weeks ago I've seen one of them at a customer's plant: the controller is still working after more than 20 years, the only problem is the dim HP LED display...

author: Bored@Work
author_rank: Super Contributor
timestamp: October 29, 2011, 12:28:29 pm
content: Quote from: ciccio on October 29, 2011, 10:40:58 amThey have an online shop. Depending on configuration they quote in the range of 23 to 35 Euro per Series U, 632-type switch, excl. VAT (they might bill in CHF, I didn't check, and since they aren't in the EU, you might have to pay some import tax).What I find great about their offerings are the dummy switches - if you need some non-functional switches for "aesthetical reasons". Almost 12 Euro per U-series dummy.
Dave, Simplify your Live Shows - Page 1
Forum section: electronics / general

author: kolbep
author_rank: Frequent Contributor
timestamp: October 14, 2011, 06:29:15 pm
content: Hi Dave.I have been watching your previous live shows, and seen that you are using a Webcam and Mic for the Ustream Feed, and another camera and mic for the Video Blog recording. I have seen that you have to realign both of them when you are changing views, and also that the amount of cables, etc must be horrendous.I do not know much about how the Ustream system works, but perhaps you could simplify things (and improve quality) as follows :Get one of these :http://www.ebay.com/itm/USB-2-0-VIDEO-TV-DVD-VHS-AUDIO-CAPTURE-ADAPTER-/250863172322?pt=LH_DefaultDomain_0&hash=item3a689c3ae2You can then hook the Composite Video and Audio outputs of your camera into your computer that you use for the stream, and set the stream to use the Capture Driver instead of the webcam.This will let you still Record the HD video, as well as SD video being sent out to Ustream with the Same Camera. By eliminating the webcam and its microphone, you will make your setup less complicated, and will only have say a set of RCA cables from camera to pc, and will allow you to move the camera around more (with less chance of knocking over a glass of water).(If your computer and Camera have firewire or similar, perhaps you could use a firewire cable and avoid the above usb adaptor, but I do not know if this method will work, ie the camera passing signal to the pc whilst it (the camera) is recording)You will also know that what you see in the viewfinder is exactly what the Live Stream and the Video Blog is Showing.Hope this makes sense.BTW I have been watching so many of your videos, I think I am at risk of catching your Accent.Peter
EEVBlog #202 - Page 1
Forum section: electronics / general

author: Richard W.
author_rank: Regular Contributor
timestamp: September 21, 2011, 07:43:09 pm
content: Hello Dave,very impressive. Some time ago i worked at the EMC lab of BMW, one of the biggest automotive manufacturer in germany.The BMW emc-chamber is slightly biggerField strenght far above "healthy" are easily possible. 400V/m are usual, but thats not full powerhttp://www.7-forum.com/news/2006/fahrerassistenzsysteme/absorberhalle_p0028425-b.jpghttp://conference.vde.com/emvkfz/publishingimages/titelbild-emc04_400.jpghttp://www.emvgmbh.de/05_Partner/Bild/BMW.jpgThe chamber was also made by frankonia (afaik).I also worked with the Rohde&Schwarz ESU (36:55). Thats really expensive testgear. 80k€ or about 100k$Richard

author: EEVblog
author_rank: Unknown
timestamp: September 21, 2011, 11:05:20 pm
content: Awesome!Well, this is only Australia, it's lucky we have one at all!Dave.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 21, 2011, 11:48:22 pm
content: Quote from: Richard W. on September 21, 2011, 07:43:09 pmI would prefer an HAMEG HM400 ... do you have any source ?
Where do you type or finger touch type the tablet your EEVblog? - Page 1
Forum section: electronics / general

author: Lawsen
author_rank: Frequent Contributor
timestamp: September 21, 2011, 05:07:26 pm
content: Where do you type your EEVblog; at home, your bench, work, an Android or I Pad tablet at a bus stop, your tablet cellular telephone, on your laptop at school or library, or at an wi-fi hotspot in a cafe? Do you view all the videos? Do you make purchase decision based on the videos or you just try what ever you are curious or like? Dave Jones advice are useful to me, but I still try items that are not reviewed here on my own.This came about, when I wondered how many Australians saw a salt water crocodile? Not necessary a crocodile or alligator would crawl by, while responding to the EEV blog. Americans have similar reptile, but that is only in Florida with the alligators.

author: SgtRock
author_rank: Unknown
timestamp: September 21, 2011, 05:25:32 pm
content: Dear Lawsen:--I conduct all business from my work bench/desk/kitchen table. I have seen all of the videos and I am working my way through the Amp Hour programs. I always take DJ's advice into consideration, but I never by major pieces unless they are used and cheap."If it weren't for Philo T. Farnsworth, we'd still be eating frozen radio dinners. Johnny CarsonBest RegardsClear Ether
Heat Sink Question - Page 1
Forum section: electronics / general

author: Keith
author_rank: Contributor
timestamp: September 20, 2011, 05:29:21 pm
content: I just purchased a few Heat Sink mounting kits that come with the hardware and an insulator to support a TO-220 mount. My question is do I need to purchase and apply a heat sink compound to this assembly or is the mounting kit and insulator sufficient? Thanks.....

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 20, 2011, 07:37:37 pm
content: Usually I add thermal compound in the back plate of the transistor and at the heat sing.The existence of the insulator plate does not change anything.

author: Unknown
author_rank: Unknown
timestamp: September 20, 2011, 08:01:57 pm
content: Depends on the type of insulation. Hard stuff like mica needs thermal grease to fill all voids, the soft silpads can be deformed and will do most of the work themselves, although I guess a tiny amount of thermal grease wouldn't hurt. Thermal grease is necessary to displace any air that's inevitably present between two hard surfaces that are not perfectly flat, but copper or aluminum conduct much better, so always use thermal compound sparingly.