hybridfree/eevblog-posts huggingface dataset:
Videos on the blog website - Page 1
Forum section: electronics / general

author: JimP
author_rank: Newbie
timestamp: February 06, 2014, 09:35:56 pm
content: I haven't seen as many videos posted over the last couple of weeks as I have in previous months.Is something wrong, or are you running out of things to blog about?I'm not complaining. I'm just stating an observation on my part.I enjoy the EEVBlog, and will continue watching until something causes me not to.Regards, JimP

author: mariush
author_rank: Super Contributor
timestamp: February 06, 2014, 09:42:33 pm
content: First few months of the year are months where generally there's very little advertising revenue.Most companies stop the advertising campaigns or "do their inventory" and revenue from ads on youtube drops significantly.Not saying Dave is reducing the frequency for this reason... it's just a guess. Maybe he's too busy with life or with his Kickstarter project (the uCurrent Gold).

author: EEVblog
author_rank: Unknown
timestamp: February 06, 2014, 10:47:01 pm
content: Quote from: mariush on February 06, 2014, 09:42:33 pmDouble bingo.

author: EEVblog
author_rank: Unknown
timestamp: February 06, 2014, 10:48:21 pm
content: Quote from: mariush on February 06, 2014, 09:42:33 pmThat never enters into the equation, not even the slightest bit.

author: JimP
author_rank: Newbie
timestamp: February 07, 2014, 06:09:19 pm
content: I understand. I look forward to seeing more videos on all subjects when you have finished processing the uCurrent kickstarter project.

author: vaualbus
author_rank: Frequent Contributor
timestamp: February 07, 2014, 09:20:14 pm
content: dave within this subject you'll eventually continue the Agilent E35670A repair videos also because now you have the schematics!Looking forward to see another world exclusive of the new tek scope.

author: EEVblog
author_rank: Unknown
timestamp: February 07, 2014, 09:32:58 pm
content: Quote from: vaualbus on February 07, 2014, 09:20:14 pmThat's the plan. Plus the Tek scope.QuoteYep, and there is a couple of days gone right there.And that's the thing it takes a good days works to faff around and shoot and edit a typical video, not including housekeeping or other projects or commitments and I basically work maybe 5 days days a week total. So at best I can only bring out say 4 videos a week on a good week.Over the last almost 5 years I have averaged about 2.5 videos a week, so I'm current doing about that average.

author: vaualbus
author_rank: Frequent Contributor
timestamp: February 07, 2014, 09:55:07 pm
content: yes I'll look forward the videos.You've a strange fortune, when you try to repair somethingh is either a broken hybrid (the lecroy scope) or, as far as now, all the OA burn. Good fortune!How much you take to edit a video?
The Mooshimeter:  a 24-bit wireless multimeter for your phone - Page 1
Forum section: electronics / general

author: Involute
author_rank: Contributor
timestamp: February 07, 2014, 03:15:33 pm
content: $99 on Dragon Innovtaion:http://www.dragoninnovation.com/projects/34-mooshimeterI'd love to see a review of this, though it's not due until August.And, there's this: "The Mooshimeter’s current measurement mode introduces 20 microvolt/milliamp of burden voltage when measuring in 2uA steps over a full 10A range. "

author: sync
author_rank: Frequent Contributor
timestamp: February 07, 2014, 03:28:13 pm
content: There is already a thread about it:https://www.eevblog.com/forum/crowd-funded-projects/mooshimeter-wireless-smartphone-multimetre/Quote from: Involute on February 07, 2014, 03:15:33 pmDo the math!

author: Involute
author_rank: Contributor
timestamp: February 07, 2014, 03:32:44 pm
content: Oh, sorry. I searched on "Mooshimeter" and nothing came up. Thanks for the pointer.

author: sync
author_rank: Frequent Contributor
timestamp: February 07, 2014, 03:46:55 pm
content: Yes, the forum search doesn't work well. Use google with "site:eevblog.com" in the query, e.g. "site:eevblog.com mooshimeter"

author: jaxbird
author_rank: Frequent Contributor
timestamp: February 07, 2014, 04:26:58 pm
content: Quote from: sync on February 07, 2014, 03:28:13 pmNot impossible, but they will need to squeeze 22.5 usable bits out of their 24 bit ADC and surrounding circuitry.That does sound a bit too impressive for a product retailing at $99.

author: sync
author_rank: Frequent Contributor
timestamp: February 07, 2014, 04:57:02 pm
content: Quote from: jaxbird on February 07, 2014, 04:26:58 pmIt has a +/-10A range. So it's 23.25 usable bits and 40nV (or less) per 2uA step.

author: jaxbird
author_rank: Frequent Contributor
timestamp: February 07, 2014, 05:20:35 pm
content: Quote from: sync on February 07, 2014, 04:57:02 pmI didn't take the +/- into account, you are right, 23+ usable bits is close to impossible to achieve with a 24 bit ADC unless it's fast and you can do oversampling. (IMO just 20 usable bits would be impressive)A 5.000.000+ count meter for $99 does sound a bit unrealistic

author: Huluvu
author_rank: Regular Contributor
timestamp: February 07, 2014, 05:34:47 pm
content: Quote from: sync on February 07, 2014, 04:57:02 pmImho this small steps represents only the theoretical values and will never be achievable with such a device.
Deriving design precision specs. (µCurrent GOLD example) - Page 1
Forum section: electronics / general

author: Christe4nM
author_rank: Unknown
timestamp: January 25, 2014, 07:58:14 pm
content: Hi Dave,Lately I've been wondering how you determined the precision of your µCurrent design. It is more than just the µCurrent, but in general how do you get from component precision to circuit precision. I thought that it would make a great fundamentals Friday. Just in case it's not, could you still reply, 'cause then I might open a topic in the projects section.Keep on doing the great workChristean

author: c4757p
author_rank: Super Contributor
timestamp: January 25, 2014, 08:33:17 pm
content: I agree, error analysis would make a great FF topic.

author: robrenz
author_rank: Super Contributor
timestamp: January 25, 2014, 08:34:45 pm
content: +2Including how to calculate your final accuracy including voltage specs of whatever you have µcurrent plugged into.

author: Wytnucls
author_rank: Super Contributor
timestamp: January 25, 2014, 08:55:31 pm
content: The MetraHit 30M has a resolution of 100 pA on the 100 uA DC range, with an accuracy of 0.02% of reading + 0.002% of range. What kind of DMM does one have to plug in the uCurrent to achieve the same kind of accuracy?

author: EEVblog
author_rank: Unknown
timestamp: January 25, 2014, 09:00:09 pm
content: That's a big can'o'worms potentially.In this case I simply wanted "better" than my old one, so chose the next best precision value available (0.05% instead of 0.1%).You can calculate "circuit precision" from the datasheet values in theory, but in practice I test to a tighter spec than what the datasheet says.But then you have the whole issue of metrology and calibration, drift, aging, temperature etc.It would be a video where it would be guaranteed I would:a) do something different to "how it should be done" and hence the complaintsandb) brush over many areas for the sake of simplicity leading to more complaints!In a word, from a blog video point of view, I think it's pretty a pretty "messy" topic.But I agree it's an interesting topic.

author: c4757p
author_rank: Super Contributor
timestamp: January 25, 2014, 09:04:02 pm
content: Of course there'd be whining, but isn't there always? It's a complicated topic, but that's kind of the point to making a video about it!

author: tszaboo
author_rank: Super Contributor
timestamp: January 26, 2014, 12:20:45 am
content: Quote from: Christe4nM on January 25, 2014, 07:58:14 pmThere is the "worst case" analysis, where you have to know how your circuit works, and add together the errors (with significance). There is the monte-carlo analysis, where you just run a simulation few thousand times to get a distribution, and then make confidence intervals for the accuracy. You can also test a few dozen finished product. Also, there are several methods to determine which parameter is significant, which is not.This is definitely not beginners topic...
Using power mosfests in switching applications. - Page 1
Forum section: electronics / general

author: zapta
author_rank: Super Contributor
timestamp: January 25, 2014, 04:19:38 pm
content: The last video about cascading op amps and the affect on bandwidth was very interesting and the right amount of theory vs. hands on.Would be interesting to have something similar for driving power mosfets in switching applications. Handling gate capacitance, high side driving, H bridges, choosing N vs P, inductive loads (step motors), effect of frequency and transition time on power dissipation, etc.
LTspice ac analysis to determine stability of op-amp circuits - Page 1
Forum section: electronics / general

author: mmilejski
author_rank: Contributor
timestamp: January 12, 2014, 09:37:08 am
content: What about a video where Dave would show how to conduct an in depth analysis of some op-amp circuit prone to oscillation, including:modeling test jigan introduction to Bode plottingcommon ways to reduce oscillation in op-amp circuitsusing step function to choose right values for resistors and capacitors in feedback loopI hope that is a good ideaMaybe someone can post a link to existing video or document?I already sawLT videoon it, but it is short and does not explain Bode plots, just assumes viewer knows it.

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: January 12, 2014, 11:14:08 am
content: Hi,I have a look at his thread:https://www.eevblog.com/forum/projects/dynamic-load-bode-plot-using-hp-35665a-dsa/msg309192/#msg309192A Bode plot is the plot of the frequency response of a system versus frequency. The plot can show just amplitude or amplitude and phase.The Bode plot is normally plotted with Log amplitude in dB on the y-axis and Log Frequency on the X-axis.A single pole filter low pas filter will have a slope of -20dB per decade of frequency.Bode plots are very effect for control loop analysis.Before PCs, I used to solve control loop problems by drawing the various elements on Log-log paper.Have a look at this:http://en.wikipedia.org/wiki/Bode_plotIt is a bit over-the-top, in the mathematical department.Regards,Jay_Diddy_B
shootouts for other equipment - Page 1
Forum section: electronics / general

author: deth502
author_rank: Frequent Contributor
timestamp: January 15, 2014, 09:13:26 pm
content: multimeter shootouts seem to be the big thing, but there is a lot of other equipment out there for the hobbyist/electronics tinkerer that falls by the wayside.what about some shootouts them? one for esr meters, lcr meters, even cheap signal generators and such. there is not such a dizzying array of those, so i would think it to be a bit easier than trying to choose between multimeters...again, and again. for instance, between a cheap chinese arduino based esr on ebay for $15 to a $200 bk precision or peak esr there are only maybe 5-6 popular choices that i know of, and i have never really seen any of these reviewed in an apples to apples kind of way against each other.i recently bought a cheap signal gen.http://www.ebay.com/itm/DDS-Function-Signal-Generator-Module-Sine-Triangle-Square-Wave-Servo-Signal-/281220887054?pt=LH_DefaultDomain_0&hash=item417a12320eimo, about as basic as you can get. no frills, no bells and whistles, but it does what i need it to do.it would have been nice seeing an apples to apples comparison between something like this, and a few of the cheaper chinese units in the $150 and below range for the hobbyist, to see the difference and decide if its worth getting the more expensive model. sure, id like to have a nice expensive name brand function gen with all the bells and whistles, but for someone who doesnt make a living with it, the cost gets very prohibitive.afa this forum goes, it seems most here are more professional engineers, so this idea might not go over to well here, but i think there are a lot of hobbyists like me who cant afford to drop $1500 in a signal gen that watch your videos for the great educational value that could use something like this. besides, (even though id like to see the "pocket dmm" video that was suggested) havent we had enough dmm shootouts already??

author: electronics man
author_rank: Frequent Contributor
timestamp: January 15, 2014, 09:17:42 pm
content: It's a good idea mabe a function gen shoot out and what i haven't seen is an osciloscope shoot out I know he has done many side by side comparisons but no shoot outs mabe between 5 or 6 oscilascopes below $800 or something

author: deth502
author_rank: Frequent Contributor
timestamp: January 15, 2014, 09:37:02 pm
content: Quote from: electronics man on January 15, 2014, 09:17:42 pmindeed, budget scopes would make a good one too.maybe bargain power supplies too.
Function Generator reviews.. - Page 1
Forum section: electronics / general

author: Six_Shooter
author_rank: Regular Contributor
timestamp: November 19, 2013, 03:34:29 am
content: As some one else has pointed out in another thread there seems to be a lack of Function Generator reviews or even tear downs, forgive if there has been some, I'm only up to video #435.I'd like to see some reviews to see what is good and what isn't in the market place, especially since I'm currently looking for one.

author: saturation
author_rank: Super Contributor
timestamp: November 21, 2013, 03:11:20 pm
content: Until Dave makes one, see threads discussing the Instek SFG 1003 for a basic FG and the Hantek 3x25, which provides bang for buck high frequency output and waveform generation. From eevblog videos, you can get a general viewpoint by searching videos terms under 'generators' which cover function, signal, waveform or RF generators.

author: JoeN
author_rank: Frequent Contributor
timestamp: January 06, 2014, 02:09:53 am
content: He has these vids available:Siglent Teardown:Agilent Teardown:Rigol 4162 Non-Teardown:Rigol 4162 Non-Teardown:Personally I would love to see a teardown on a Rigol 4xxx or 5xxx. It's been a while since I saw that video, but I think Rigol lent those to Dave for a short period of time and expected them back not torn down so he didn't so it.

author: TMM
author_rank: Frequent Contributor
timestamp: January 06, 2014, 04:24:53 am
content: Quote from: JoeN on January 06, 2014, 02:09:53 amI've seen the 4000 on the shelf in heaps of videos since. I think the reason for not posting a teardown is that Mike has already done an excellent one:

author: electronics man
author_rank: Frequent Contributor
timestamp: January 06, 2014, 06:44:56 pm
content: It would be nice if he could do a side by side review or even a shootout like his multimetor ones
Tesla S teardown - Page 1
Forum section: electronics / general

author: zapta
author_rank: Super Contributor
timestamp: January 05, 2014, 01:08:27 am
content: Somebody mentioned a similar idea in another thread. Have a Kickstarter campaign for a Tesla teardown, buy a used bare bone Tesla S (60K USD?) and have a series of teardown videos. I will back it up.

author: ginsweater
author_rank: Newbie
timestamp: January 05, 2014, 03:53:31 am
content: Buying the whole thing seems like overkill. Lots of the money is in the non-electronic parts (the body, the giant bank of batteries, etc.)There are certainly some great individual parts in electric cars and hybrids, though. I was watching some of the old power supply design videos and thinking I'd love to see Dave take apart one of the huge switching 12V power supplies that go in these things - they're typically capable of 70 A or more continuous output, and built to automotive reliability standards.EDIT: Just realized this was referring to a joke elsewhere. Nothing in this post is meant to suggest I don't think Dave should have a Tesla!

author: echen1024
author_rank: Super Contributor
timestamp: January 06, 2014, 04:41:20 pm
content: Maybe Vincent should donate his...

author: mdszy
author_rank: Unknown
timestamp: January 06, 2014, 05:36:47 pm
content: Quote from: zapta on January 05, 2014, 01:08:27 amI feel like that'd be against Kickstarter's rules
build a radio? - Page 1
Forum section: electronics / general

author: electronics man
author_rank: Frequent Contributor
timestamp: January 04, 2014, 04:18:14 pm
content: i know this is realy basic but it would be nice af dave could design and biuld a radio and (not a very basic radio something a bit more complex) explain exactly how everything works but i think it would make a good video if does simple stuff like putting a kit together on camera then he can biuld a radio.

author: dr.diesel
author_rank: Super Contributor
timestamp: January 04, 2014, 04:53:34 pm
content: Just for clarification of your request, you talking AM, FM, shortwave, amateur transceiver, 10Ghz MBSFN?

author: electronics man
author_rank: Frequent Contributor
timestamp: January 04, 2014, 05:00:54 pm
content: Don't mind too muc but FM would be interesting

author: Unknown
author_rank: Unknown
timestamp: January 04, 2014, 05:03:44 pm
content: Quote from: electronics man on January 04, 2014, 05:00:54 pmI would have thought that something non-basic would mean something that wasn't olden days technology. How about DAB.

author: electronics man
author_rank: Frequent Contributor
timestamp: January 04, 2014, 05:53:24 pm
content: mabe some clarification is in order meant nothing simple like an old fasioned cats wisker radio and something that can easily be fitted in a regular episode

author: MatCat
author_rank: Frequent Contributor
timestamp: January 04, 2014, 05:58:43 pm
content: Though I am sure he could do a basic radio, I have heard him say many times over he is not an RF engineer.
Contents proposals for 2014 - Page 1
Forum section: electronics / general

author: Bloch
author_rank: Unknown
timestamp: December 29, 2013, 04:43:13 am
content: Hi DaveMy proposals may not be as popular in views as you mailbag videosBut i would really appreciate if you did some more LTSPICE Tutorials as the one you did in September. Or was the "Part 1 in a series of LTSPICE tutorial videos." just a tease

author: strangelovemd12
author_rank: Regular Contributor
timestamp: December 29, 2013, 05:09:30 am
content: I just downloaded spice and am having fun playing around but some tricks and conventions would be handy to learn, so more LTspice stuff would be great. Doesn't he open it up in the PSU series at some point?The title indicates this thread was meant more for general suggestions, so I'm game for pretty much anything that Dave feels like doing. I'm interested in maybe 90% of his vids, so whatever comes out will probably be something I enjoy.Whatever comes of that little Sinclair vehicle should be fun to see.

author: EEVblog
author_rank: Unknown
timestamp: December 29, 2013, 08:26:07 am
content: I've down a couple of LTspice videos now, but yeah, that was meant to be a small mini-series, but you know, other things always come up...

author: Bloch
author_rank: Unknown
timestamp: December 30, 2013, 08:52:40 pm
content: Quote from: EEVblog on December 29, 2013, 08:26:07 amThe above was not a criticism. It was more of a reminder if you forgot about it :-)And what kind of any substance I hope to see just once in a while. But I'm a patient man so with any luck, then there's probably a sequel.I have the utmost respect for your/company/brand that you have built up - and from the outside it look like it can give you and the family food on the table. Not many in elektroniks can say way do that so very well doneWishing you and you family a happy New year

author: dog80
author_rank: Regular Contributor
timestamp: January 03, 2014, 01:53:32 pm
content: I would like a Fundamentals Friday on differential signals, ie how to generate them and how to display them on an oscilloscope. Also a piece on POTS signals.

author: electronics man
author_rank: Frequent Contributor
timestamp: January 03, 2014, 02:55:04 pm
content: yeah diferential signaling would be good as dave alwase talks about it but im not too sure how it works and how too produce a nd decode diferential signals.
Storage of components? - Page 1
Forum section: electronics / general

author: electronics man
author_rank: Frequent Contributor
timestamp: January 03, 2014, 11:54:16 am
content: Dave it would be great if you could do a blog about how you store components and how you recommend people store SMD and through hole parts and esd handling suggestions. This would be great dave I think a lot of people would appreciate it.

author: mcinque
author_rank: Unknown
timestamp: January 03, 2014, 12:05:46 pm
content: It would be great!
Content-Type for forum attachments - Page 1
Forum section: electronics / general

author: johnwa
author_rank: Frequent Contributor
timestamp: January 03, 2014, 01:44:53 am
content: Hi Dave,I have a small suggestion for a possible improvement of the forum. It has come to my attention that the server is sending a Content-Type: header of application/octet-stream for all attachments to posts - see the thread athttps://www.eevblog.com/forum/projects/another-kit-all-discrete-power-supply/msg0/?topicseen. It appears that this may be causing problems for some readers.The other alternative would be to configure the server/forum software to send an appropriate Content-Type, presumably based on the extension of the file. (I think it should be application/x-pdf or something similar for the file in question). However, apart from any issues with reconfiguring the software, I am not entirely sure which is the best approach. I think the application/octet-stream type acts as a suggestion to save the file, though the browser is free to ignore this.Perhaps other readers may be able to comment on the advantages and disadvantages of each approach. I did a bit of searching, it appears that other people have also experienced this problem:https://www.eevblog.com/forum/news/attached-jpg's-wont-open-within-firefox/On a related note, it appears that the video downloads fromwww.eevblog.comare being served up with a Content-Type: of text/plain, which definitely suggests a misconfiguration somewhere - I expect quite a few visitors will have their browser windows filled with random binary garbage if they try to use the download link.All the best for 2014 - I am keen to see what you have in store!
Video blog proposal: designing an RC snubber - Page 1
Forum section: electronics / general

author: jippie
author_rank: Unknown
timestamp: December 22, 2013, 07:13:04 pm
content: How do they work and how should I size the components in an RC snubber that goes across a relay switch to suppress sparks and prevent RFI when switching mains inductive loads? Fundamentals Friday on RC-snubbers.In the past I have successfully made a snubber network for switching a PC audio amp, but it was a lot of guessing how to size it and what effects to consider. It worked, but it is more luck than wisdom. Are there any rules of thumb? What power rating should the resistor have andwhy. Is it true the resistor should blow in case the capacitor fails short, is that a design goal? Should that resistor really be able to continuously dissipate several Watts just for the single pulse every once in a while? Should the snubber go across the switch or across the devices mains input? What about leakage current? Is a snubber for switching on an amp different from a snubber across a phase angle controlled TRIAC?I've been asking around about snubbers in various places and I get a feeling that it is like black magic. But when it comes to electronics I don't believe in magic, I like to understand what is happening and why I'm doing things in a certain way. Never really found a good article on Internet about these snubbers.

author: Bloch
author_rank: Unknown
timestamp: December 30, 2013, 08:59:22 pm
content: Quote from: jippie on December 22, 2013, 07:13:04 pmHave you seenDesigning RC snubbersDESIGN OF SNUBBERS FOR POWER CIRCUITSNo magic but a lot of formulas
Blog idea - a visit to an Electronic junk store - Page 1
Forum section: electronics / general

author: zapta
author_rank: Super Contributor
timestamp: November 01, 2013, 12:46:33 am
content: Visited today at a local surplus store. This is a really impressive place, kind of a treasure island for people that love electronics. Tons of components, old test equipment, hardware, and general junk.Dave, if you have one in your area, this can be an interesting blog. There are thousands of stories that can be told about each piece of electronic junk.

author: zapta
author_rank: Super Contributor
timestamp: November 02, 2013, 04:45:01 am
content: Quote from: george graves on November 01, 2013, 01:33:41 amThanks George.BTW, our junk store is more exciting. Less boxes and more visible stuff.

author: JohnnyGringo
author_rank: Regular Contributor
timestamp: November 02, 2013, 05:40:05 am
content: Quote from: zapta on November 02, 2013, 04:45:01 amGPS Coordinates?

author: zapta
author_rank: Super Contributor
timestamp: November 25, 2013, 05:09:49 pm
content: https://plus.google.com/116124970403053182715/about?rfmt=s&hl=en&gl=us

author: station240
author_rank: Unknown
timestamp: November 30, 2013, 02:45:26 pm
content: Used the be a place in Adelaide called Robby the Wrecker, much smaller scale but just as disorganised.I only when there once, and to be honest I struggled to find stuff I actually wanted enough to buy.Got a few components and a prototype device with some odd 7 segment style display made from multiple dots. Only the vast amount of junk I've had over the years, none of the stuff I got that day ended up at the dump.

author: andtfoot
author_rank: Unknown
timestamp: November 30, 2013, 03:03:56 pm
content: I don't think of heard of any electronics surplus stores in Australia.I'd love to know if there are actually any open ones around. I'd be even more broke before you know it...

author: resistor
author_rank: Regular Contributor
timestamp: December 05, 2013, 04:50:07 am
content: Quote from: zapta on November 25, 2013, 05:09:49 pm+1 for HSC! They have some awesome stuff there.

author: echen1024
author_rank: Super Contributor
timestamp: December 22, 2013, 04:31:32 am
content: Quote from: resistor on December 05, 2013, 04:50:07 amAnd massively overpriced test equipment.

author: RJSC
author_rank: Regular Contributor
timestamp: December 22, 2013, 04:44:57 am
content: Quote from: andtfoot on November 30, 2013, 03:03:56 pmDave has that office building dumpster room with free stuff poping all the time. I'd prefer that to a surplus store.
LCD panel meters, but more than one at the same time - Page 1
Forum section: electronics / general

author: efron
author_rank: Contributor
timestamp: February 28, 2014, 06:04:15 pm
content: Hello,A digital panel meter is very easy to use when used as standalone.But when one wants to use more than one at the same time, let's say two (e.g. one for voltage measurement, the other for current measurement) things can become difficult beause of things to take care of depending on the meter configuration; common-ground or isolated power supply.All this 'hidden' stuff is not easy to find in the internet. Well, this is my case, I still don't know how to manage safely two panel meters powered in parallel by the same isolated power supply without blowing them out!Well, to fix the problem I could use 2 isolated power supplies, but well, even in the hobbyst world we can do better than that.Thanks,Efron

author: Neverther
author_rank: Regular Contributor
timestamp: February 28, 2014, 07:35:27 pm
content: This seemed familiar.https://www.eevblog.com/forum/projects/stuck-when-using-2-lcd-panel-meters-in-parallel

author: efron
author_rank: Contributor
timestamp: March 03, 2014, 08:53:40 pm
content: Quote from: Neverther on February 28, 2014, 07:35:27 pmYeap, it was mine.But I can't still find what is hidden inside common-ground and non common-ground digital panel meters.
Hello Dave, care for something completely different for a teardown or project? - Page 1
Forum section: electronics / general

author: Phrea
author_rank: Newbie
timestamp: January 11, 2014, 07:10:27 am
content: Hello, I'm new to the forums, in fact, this is my first post, but I've been following your YT vids for years.I have something for you, if you are interested !It's a Fujica Single 8 Sound ZXM 300 8MM film camera ! It takes batteries so it is at least partially electronic, but I am guessing it's a great deal mechanical too.I originally bought it [cheap in a second hand store for €2.50, would you believe it] for myself, just to tear it down, and have some fun with it, but then I thought: this really is something Dave has never torn down before !Please let me know if you're interested in it for a teardown/check/repair/project. I have not tested it, because I haven't tried to get an 8mm film cartridge for it.Also, I'll have to ship it to you from The Netherlands.I thought it was something new for you to tear down, since it's so old school, and half electric and half mechanical ! Maybe the viewers might enjoy something this different too !Please shoot me an email to the adress I registered with, because I don't know if I'll frequent this board a lot.Thanks for your consideration !EDIT: I hope I posted this in the right forum, if not, please move it to the place where these kinds of posts are supposed to be.Hope to hear from you !BTW: it'sthis camera.

author: EEVblog
author_rank: Unknown
timestamp: January 11, 2014, 08:37:13 am
content: Thanks for the offer, but I suspect there is very little inside that would be interesting enough?

author: Phrea
author_rank: Newbie
timestamp: January 11, 2014, 01:18:02 pm
content: Oh, ok.Thanks for reading though, and keep up the good work !
240VAC -> 110VAC voltage step down transformers - Page 1
Forum section: electronics / general

author: niko
author_rank: Newbie
timestamp: February 10, 2014, 12:32:30 am
content: Hi Dave and fellow EEVBlog followers,I have always been weary of purchasing and/or using a step down transformer and I think it would be cool to have a few of the cheap and mid range step down transformers reviewed. Your thoughts on which ones are cheap but safe to buy/etc would be great to hear and would put my mind and several others at ease to know if safe practices are used in these.For example, I've bought the "brick style" in the past but am now thinking if it's worth buying the bench style units and a review/benchmark of some of these cheap units on eBay would be awesome.Supposed 50W brick style unit I'd bought to transform 220v to 110v for a 17W device and yet it failed to power the device on beyond standby:http://dx.com/p/50w-220v-to-110v-power-transformer-2228#.Uvgcy7RryRQThanks again, hope to see a video on these one day!

author: mariush
author_rank: Super Contributor
timestamp: February 10, 2014, 01:43:58 am
content: That thing you linked to on dx.com is not using a transformer to generate the 110v.It works on the same principles as a light dimmer, probably using a triac or something similar to chop the incoming AC to the levels a 110v output would be.Scroll down under the stupidity at the top of the page (advising to put 190 diodes in series to drop voltage) on this page and you'll have a circuit that might be similar to what's inside your converter:http://homemadecircuitsandschematics.blogspot.ro/2012/08/making-220v-to-110v-transformerless.htmlhttp://homemadecircuitsandschematics.blogspot.ro/2012/03/how-to-make-220v-to-110v-dc-converter.html

author: niko
author_rank: Newbie
timestamp: February 10, 2014, 02:27:43 am
content: That makes a lot of sense, is there any danger in doing it this way? What is the proper way to do it?

author: mariush
author_rank: Super Contributor
timestamp: February 10, 2014, 03:28:29 am
content: When you say "step down transformers" most people would think you refer to something that provides some degree of isolation.Classic transformers and most switching power supplies offer isolation making a circuit safer for humans.Now of course, that product never claims to provide isolation and never claims to "transform" the voltage, at least from what I can deduct from pictures.. ignoring the title which is written by stupid dx.com employees.Classical transformers are big and heavy, even for some measly 50VA the adapter would be probably twice the size of that converter and about 1-2 Kg in weight.For high wattage, I imagine other solutions would be based on designs similar to how inverters work, or how an UPC works.This converter just screws with the AC wave, could be gaps where the triac or whatever it used turns off or on, the parts used may change characteristics as they heat up from the current, who knows.
To Reverse Engineer The Sinclair TV, Thus it shall live again HA HA HA HA :-DD - Page 1
Forum section: electronics / general

author: TheEPROM9
author_rank: Frequent Contributor
timestamp: December 04, 2013, 12:44:22 am
content: With the schematic and service manual it would be possible to reverse engineer the original ULA in this wonderful device.Another advantage Dave could share knowledge on how to reverse engineer a product. =-)
Video Idea: Why do I need an _____? - Page 1
Forum section: electronics / general

author: resistor
author_rank: Regular Contributor
timestamp: December 05, 2013, 04:55:12 am
content: Just thought I'd toss out an idea I had for a (sequence) of videos: Why do I need a _____ ?Everyone watching your videos knows what a handheld multimeter is, and most are probably familiar with an oscilloscope as well. (And if not, you've got plenty of other videos covering them) But why do I need a spectrum analyzer? A vector network analyzer? A universal counter? Even something as simple as a high-precision bench meter?The idea would be to have a periodic feature focusing on a different type of less-common test equipment (vintage units fine), discuss what it does, why it's useful, and in what circumstances you might want to get one for your lab. Ideally you could have some kind of demonstration of the kind of useful things you could do with it.

author: BravoV
author_rank: Super Contributor
timestamp: December 05, 2013, 05:03:08 am
content: Great idea, especially from an enthusiast's paradigm like my self.Also don't forget the bench PSU, just see those tons of threads or posts that the posters are so proud and happy using a modded PC's psu as an adjustable bench psu.Nothing wrong though, especially they're lack of budget or they know exactly what they're doing.Its just I believe many of them need to be enlightened about the risks, culprits and etc when tweaking with electronic circuits, especially the expensive ones.

author: EEVblog
author_rank: Unknown
timestamp: December 05, 2013, 05:46:05 am
content: Not a bad idea...

author: Six_Shooter
author_rank: Regular Contributor
timestamp: December 08, 2013, 05:18:54 am
content: I'd watch this series of videos with interest.

author: romantronixlab
author_rank: Regular Contributor
timestamp: December 08, 2013, 11:45:41 am
content: I totally agree on this idea. That is what I was asking myself a couple days ago and really don't know that those equipment really do or even, how to use them.BTW I made my own PSU out of a PC' power supply, but after seeing a lot of videos about bench PSU's and safety I will probably mod it to make it safer and of all make power controllable. Until my electronics budget is available to get a proper unit.
Forum suggestion...How about an Ask me about ________" - Page 1
Forum section: electronics / general

author: Skimask
author_rank: Super Contributor
timestamp: November 18, 2013, 10:14:03 pm
content: Thinking about that recent post about dino fueled power plants, where the O/P had intimate knowledge of the inner workings of them...How about a sub-forum just for that...Say a guy knows a load about subject X...the forum thread starts out "Ask me about ______".I'm thinking it probably wouldn't be for power supplies, PCs, load banks, etc. It would be for those handful of things that not a lot of people know about and there's not a lot of useful info out there on...
General programming forum - Page 1
Forum section: electronics / general

author: Arp
author_rank: Unknown
timestamp: November 14, 2013, 10:51:22 am
content: Can't find it. Should be there, and divided up into different programming languages such as C, C++, C#, Java etc?

author: Hideki
author_rank: Frequent Contributor
timestamp: November 17, 2013, 02:38:01 am
content: Why should it be there? That's not electronics. When it DOES relate to electronics, such posts usually fit well in the Microcontrollers & FPGA's subforum.

author: apelly
author_rank: Unknown
timestamp: November 17, 2013, 02:48:38 am
content: Quote from: Arp on November 14, 2013, 10:51:22 amMate, the internet is 60% pr0n, 10% programming, .01% (other) interesting stuff and 29.99% crap. No need to re-invent the wheel!

author: Bored@Work
author_rank: Super Contributor
timestamp: November 17, 2013, 07:12:40 am
content: Quote from: apelly on November 17, 2013, 02:48:38 amCats, you forgot the cats.

author: Psi
author_rank: Super Contributor
timestamp: November 17, 2013, 08:30:07 am
content: Quote from: Bored@Work on November 17, 2013, 07:12:40 amThe cats don't take up bandwidth, they make up the very fabric of the internet.At any time they are everywhere and nowhere.

author: codeboy2k
author_rank: Super Contributor
timestamp: November 17, 2013, 06:36:55 pm
content: Indeed.Cats are the photons of the Internet.

author: Arp
author_rank: Unknown
timestamp: November 18, 2013, 07:12:00 pm
content: Quote from: Hideki on November 17, 2013, 02:38:01 amIMHO they are connected. Control software for CNC and such can be written in C# etc utilizing the proper libraries

author: free_electron
author_rank: Super Contributor
timestamp: November 18, 2013, 07:37:23 pm
content: Quote from: codeboy2k on November 17, 2013, 06:36:55 pmCats make up the fuzz and produce the static on the network...

author: Unknown
author_rank: Unknown
timestamp: November 18, 2013, 08:46:37 pm
content: Quote from: Arp on November 18, 2013, 07:12:00 pmIf they are connected could you show me an example of a dedicated CNC section on a popular c# programming forum? :-)You can always post to stuff to "General" or "Projects, Designs, and Technical Stuff" if you need to.
Suggestion : Trader rating system at the forum ? - Page 1
Forum section: electronics / general

author: BravoV
author_rank: Super Contributor
timestamp: November 15, 2013, 04:33:32 pm
content: Just a thought Dave, the Buy/Sell/Wanted section is getting crowded, especially looking at the accelerated growth at the forum's population recently, yes, even after the last contest at Oct 13 ended, its still growing quite fast imo.I believe this feature will improve the forum member's experience, and the most important is to assist potential buyers, and also helps sellers with good reputations as well.Please consider it.

author: dr.diesel
author_rank: Super Contributor
timestamp: November 15, 2013, 05:20:43 pm
content: Heatware.com is a popular private user based system, been around a long time.
How about a review of your Canon HFG10 camcorder? - Page 1
Forum section: electronics / general

author: Involute
author_rank: Contributor
timestamp: July 23, 2012, 08:59:33 pm
content: I know you're not strictly a camcorder blog, but itisa piece of electronics, and an integral part of your operation. And, it seems, to me, you reviewed your overall blogging setup a long time ago, so there's precedent and you're due for another one. Plus, I'm thinking of buying an HFG10. I'm particularly interested in the value of its peaking and zebra stripes features. And, of course, anything else you think is worthwhile.

author: EEVblog
author_rank: Unknown
timestamp: July 23, 2012, 11:23:47 pm
content: I've always wanted to, but never got around to it.It's likely to be superceeded soon, it's been around for a long time.Dave.

author: DrGeoff
author_rank: Frequent Contributor
timestamp: July 24, 2012, 12:03:04 am
content: Hard to take a video using it when you are taking it apart!

author: EEVblog
author_rank: Unknown
timestamp: July 24, 2012, 01:06:22 am
content: I now have a 2nd cam, a Canon HF M400. Same sensor, just smaller lens, and not as wide. So Ican now shoot two angles if needed, with similar quality.They went stupid on the new model, the HF M500. To make it a smidgen smaller they used a different battery, thus making it incompatibleDave.

author: SeanB
author_rank: Super Contributor
timestamp: July 24, 2012, 04:54:17 am
content: Built in obsolescence and a marketing opportunity, plus they can lock out the second source market for 6 months of sales.

author: zapta
author_rank: Super Contributor
timestamp: November 25, 2013, 05:24:39 pm
content: Quote from: EEVblog on July 24, 2012, 01:06:22 amYou can have a teardown video of these cameras, one at a time ;-)
Teardown of the Agilent U1233A (Multimeter)? - Page 1
Forum section: electronics / general

author: eV1Te
author_rank: Regular Contributor
timestamp: April 15, 2012, 01:14:06 pm
content: I would like to see a teardown/review of the latest (I believe it is the latest) Agilent multimeter U1233A (also U1231 and U1232).I have tried it out a bit myself and compared it to the two other DMMs that Agilent has (and also to the Fluke 179 i use most often):-Cheaper than the others, but does not have the same precision and functionality.-The rotary selector knob can not touch the ground if dropped (the rubber on the edges of the meter protects it.-The continuity mode is faster and has both audio and flashing light (but still not as good as Fluke)-The start-up melody can be turned off without turning of all beeps!-It has built in flashlight-It has built in non-contact voltage detection (like those small voltage pens)I have not had time to open it up yet, but I think that Dave does it better than me anyway

author: jmcdonald
author_rank: Contributor
timestamp: November 08, 2013, 10:39:11 am
content: I to would like to see a teardown of one or all of these DMMs.
Oscillators? - Page 1
Forum section: electronics / general

author: madshaman
author_rank: Frequent Contributor
timestamp: November 11, 2013, 11:15:03 am
content: Would love to see a video focussing on different types of oscillators, maybe showcasing some classic designs?

author: GrandTheftAuto4life
author_rank: Contributor
timestamp: November 12, 2013, 04:45:56 am
content: Would be very interesting to watch

author: madshaman
author_rank: Frequent Contributor
timestamp: November 12, 2013, 05:06:10 am
content: Was thinking it could also be an opportunity to show standard practices for using various test equipment to characterise and compare the performance of an oscillator.Dave has this sort of thing sprinkled through some of his videos; for those of us who didn't cut their teeth working in the EE industry, I think it can be very helpful; at least it would be for me.
usb bus  - Page 1
Forum section: electronics / general

author: diceman
author_rank: Newbie
timestamp: November 05, 2013, 02:25:42 am
content: hey there daveyou have done vids on things like SPI and I2C was wondering if you could do something on the usb buswhen you do a Youtube search on usb bus there is very little engineering information on this topici think it would make a great vid for your fundamentals friday segmenthope you like this ideaPaul

author: mariush
author_rank: Super Contributor
timestamp: November 05, 2013, 10:29:51 am
content: USB is much more complex than SPI or i2c , it's not a suitable subject for a"beginners" video.

author: amyk
author_rank: Super Contributor
timestamp: November 05, 2013, 10:59:12 am
content: Universal Serial Bus Bus?Low-speed USB isn't that complicated, you can even bitbang it with an MCU.
testing common house electronic functioning... - Page 1
Forum section: electronics / general

author: ilanko
author_rank: Contributor
timestamp: October 27, 2013, 01:12:48 pm
content: Hi Dave, I hope to see a video testing common house electronic functioning under extreme frequency or low voltage.

author: Psi
author_rank: Super Contributor
timestamp: October 27, 2013, 01:40:00 pm
content: What about under extreme high voltage. PhotonicInduction does that a lot
Episode #555 - Page 1
Forum section: electronics / general

author: Pedram
author_rank: Regular Contributor
timestamp: December 10, 2013, 05:57:53 pm
content: Hi,What about building something cool with 555 (ic) for episode #555 ?

author: Monkeh
author_rank: Super Contributor
timestamp: December 10, 2013, 06:05:01 pm
content: Quote from: Pedram on December 10, 2013, 05:57:53 pmWhat an amazing idea, I'm sure nobody has thought of doing something 555 related for episode 555.

author: opty
author_rank: Regular Contributor
timestamp: December 10, 2013, 06:26:42 pm
content: I'm pretty sure I saw this idea somewhere already...And there was thread where David was looking for ideas for video 555, well, he disappeared for a good couple of days now and I hope something exciting is coming!

author: Six_Shooter
author_rank: Regular Contributor
timestamp: December 10, 2013, 06:48:49 pm
content: I've been noticing a definite lack of video in the last week or so, since #554 was uploaded...

author: SeanB
author_rank: Super Contributor
timestamp: December 10, 2013, 07:07:16 pm
content: I think he does have one of those things called a "Life", so it needs to be used. we will have an Amp Hour fix in a while though, so you will not have to go through the DT's too much.

author: Skimask
author_rank: Super Contributor
timestamp: December 10, 2013, 07:40:44 pm
content: So, is there going to be 2 videos for Episode 556? Maybe 4 for Episode 558?

author: Stonent
author_rank: Super Contributor
timestamp: December 10, 2013, 08:22:06 pm
content: He may have stuff recorded but not posting it because he doesn't want to waste #555.

author: JoeO
author_rank: Frequent Contributor
timestamp: December 10, 2013, 11:01:32 pm
content: Some interesting upcoming videos:567666703741806
clamp meter review? - Page 1
Forum section: electronics / general

author: algorath
author_rank: Contributor
timestamp: October 11, 2013, 06:29:42 pm
content: hiyo folks. i don´t think dave has ever reviewed a clamp meter has he?i´d be interested in a fluke and/or amprobe review/teardownhow bout that dave?

author: retiredcaps
author_rank: Super Contributor
timestamp: October 11, 2013, 06:33:09 pm
content: Martin has done clamp meter reviews.https://www.youtube.com/user/mjlorton/videos