hybridfree/eevblog-posts huggingface dataset:
Forum Search Function Needs a Sort Feature - Page 1
Forum section: electronics / general

author: TheRuler8510
author_rank: Regular Contributor
timestamp: September 04, 2014, 03:53:25 am
content: Dave - The Forum Search Function Needs a Sort FeatureMaybe - there is a way to do it and I missed it?Anyhow - When searching the forums, typically the response is to have a list, which can be long and is difficult to go thru.For Instance - The list is usually not in sequential order for time, so the dates of the posts in the list are usually randomly interspersed with old and new posts. One should be able to hit a button to sort the list by time.Suggestion - Add feature to sort by time, relevance, title, poster, etc.

author: tautech
author_rank: Super Contributor
timestamp: September 04, 2014, 04:27:15 am
content: Are you using the Search to the right of the home button?You will find extra parameters there for refining a search.https://www.eevblog.com/forum/search/

author: TheRuler8510
author_rank: Regular Contributor
timestamp: September 04, 2014, 12:45:26 pm
content: Oops, Thanks--I'm a dope.
Friday lesson on Multi-phase buck converters - Page 1
Forum section: electronics / general

author: rfmerrill
author_rank: Regular Contributor
timestamp: August 30, 2014, 12:19:15 am
content: Many DC-DC converters in PCs and other digital electronics these days are multi-phase. I think there's a lack of information about how multi-phase converters work as opposed to the normal kind. Perhaps dave could give us the lowdown on what the advantages are?

author: Whales
author_rank: Super Contributor
timestamp: September 02, 2014, 10:45:32 am
content: Sounds interesting

author: Pedram
author_rank: Regular Contributor
timestamp: September 02, 2014, 04:21:30 pm
content: sounds interestingDave can get/probe multiphase regulators from dumpster diving motherboards ...

author: DutchGert
author_rank: Frequent Contributor
timestamp: September 03, 2014, 09:46:31 am
content: Yes, I miss fundamental Friday and this would be a very good topic!
Will a UPS that uses simulated sine waves damage electronic equipment or not? - Page 1
Forum section: electronics / general

author: MeganVonTincan
author_rank: Newbie
timestamp: August 08, 2014, 06:26:13 pm
content: I'd be interested in seeing Dave conduct some experiments with inexpensive UPS's (APC, CyberPower, etc) that use stepped sine waves and various types of electronics equipment (maybe breakout the Flir) to see how simulated sine waves can overheat certain types of electronics. Does Dave think cheap UPS are safe to use with PCs, test equipment, A/V equipment, etc.?

author: David Hess
author_rank: Super Contributor
timestamp: August 08, 2014, 07:26:37 pm
content: Quote from: MeganVonTincan on August 08, 2014, 06:26:13 pmThe simple answer is that in general, no. As long as the peak to RMS value is the same as a sine wave, most loads will not care. The exceptions include inductive loads like motors and transformers which may run warmer and objectionably hum more and low power factor loads like certain ballasts including passive gas discharge lamp ballasts.The switching power supplies found in most electronics in particular are unlikely to have problems unless they were defectively designed in the first place.Active lamp ballasts could go either way depending on design.Some power supplies with active power factor correction behave poorly with non-sinusoidal inputs but they were defective to start with.

author: Whales
author_rank: Super Contributor
timestamp: September 02, 2014, 10:50:43 am
content: Don't forget the harmonics/noise -> radio and TV interference ( and humming )

author: David Hess
author_rank: Super Contributor
timestamp: September 02, 2014, 12:28:28 pm
content: Quote from: Whales on September 02, 2014, 10:50:43 amI have seen this be a problem with sine wave output inverters and UPSes as well. They almost always use class-D output stages for high power density and efficiency. Presumably they meet FCC requirements but that is not enough in some applications.
Suggestion for Digilent Analog Discovery Review/Teardown - Page 1
Forum section: electronics / general

author: polishdude20
author_rank: Contributor
timestamp: July 18, 2014, 11:18:57 pm
content: Hi Dave!I've been poking around the forums trying to find out about the Digilent Analog Discovery and I found out that you had one sent to you in the mailbag one time.I know you've done many videos on cheap/usb/crappy scopes but this one might be different with all the functions it provides and the software it comes with.I would love for you to do a review or teardown of it and see what you think!

author: Syntax_Error
author_rank: Regular Contributor
timestamp: August 28, 2014, 01:19:12 am
content: And a second vote for this!I have an Analog Discovery as well, and am using it through the Real Analog course (Digilent's name for their Circuits 1 course) and it is really neat. I have no professional gear to compare it to, and I can tell it is limited to purely educational use, whether as part of a class or self-education.Since it is a Xilinx FPGA inside that implements most of the custom logic, there is a notion that maybe it could be redesigned and reprogrammed to provide additional or different functionality, still making use of the input signal conditioning and sampling circuitry.
test equipment data collection - automated or semi-automated - Page 1
Forum section: electronics / general

author: george graves
author_rank: Super Contributor
timestamp: August 20, 2014, 03:01:03 am
content: How can you collect data from several different meters/test equipment and easily get it into a spread sheet?Mostly I'm asking about having a few different meters (like a U761E) and take a snap shot of what they are measuring, and get that dumped into one line of a spreadsheet, CVS file, or the like.

author: ivaylo
author_rank: Frequent Contributor
timestamp: August 20, 2014, 10:51:31 am
content: Depends. If your multimeters are portable (but have some sort of serial connection) and from different manufacturers you have to write code (assuming their protocols are known). Actually not sure if any of the open source data logging programs doesn't support multiple instruments and let you mix manufacturers. If they are from the same manufacturer there may be a ready solution there (one of the Fluke Forms versions supports multiple simultaneous connections, Fluke Connect probably does, Agilent's mobile app supports up to three instruments, etc). And if those are bench multimeters you may still have to script a little but using the standard protocols. What are your multimeters (no idea what U761E is)?

author: miguelvp
author_rank: Super Contributor
timestamp: August 20, 2014, 05:41:03 pm
content: Someone posted this project on a thread a while back, probably worth taking a peek to see if it will do what you needhttp://sigrok.org/wiki/Supported_hardwareThe support a lot of hardware as you can see on that link.
Review / Teardown of A CircuitMaster 4000M Precision Active Oscilloscope - Page 1
Forum section: electronics / general

author: AdamPanic
author_rank: Newbie
timestamp: July 21, 2014, 06:07:17 pm
content: I would like to see Dave review aCircuitMaster 4000M Precision Active Oscilloscope, then take it a part.Product PageAs it is capable of injecting signals back into to circuit under test.
Agilent Benchvue, Benchlink and other software tools - Page 1
Forum section: electronics / general

author: andrewwong2000
author_rank: Contributor
timestamp: August 06, 2014, 04:57:58 am
content: Hi Dave,It would be pretty interesting to get your thoughts on the Agilent tools that are available to owners of MSO/DSO 2000,3000 (and 4000 scopes)In particular Benchvue, Benchlink Waveform editor and the interesting 64997A Oscilloscope Spectrum Visualizer.There are free versions and some pretty steep prices for the Pro ones.Cheers,Andrew

author: free_electron
author_rank: Super Contributor
timestamp: August 06, 2014, 05:04:58 am
content: benchvue has gotten reviews here on the forum. I helped design that thing

author: Alexei.Polkhanov
author_rank: Frequent Contributor
timestamp: August 06, 2014, 05:45:21 am
content: Benchview sucks! Crashing all the time, slow, UI locks up. Someone tried to make it sexy but forgot to fix bugs. Worth product from Agilent I have seen so far IMHO.

author: andrewwong2000
author_rank: Contributor
timestamp: August 06, 2014, 05:57:29 am
content: Nice work there with Benchvue.As a new Agilent MSO3000 scope owner with a Rigol as well, I'm interested in knowing if the value of having Agilent's PC software levels the bang for buck against a good chinese scope which seem to have more firmware bugs, slower UI, primitive PC software.Before I plough into using Python/SCPI (reminds me of my EE lab youth writing calibration lab scripts for GPIB!), I'd appreciate some impressions of the the eye candy apps.

author: Lukas
author_rank: Frequent Contributor
timestamp: August 06, 2014, 06:19:39 am
content: IMHO they messed up the 'eye candy' stuff recently. Take a look at Benchvue, the FlexDCA App and the new infiniium scope app. They all feature some custom dark theme which looks nice when viewed from a distance, but when actually working with the software looks plain ugly. The old inifiniium scope app did it perfectly: No eye candy, just use the default windows widgets. Never looks dated. Concerning FlexDCA: Anyone got an idea why they went to the trouble maintaining a set of two seperate scope apps? (one for sampling, one for realtime) Especially the old sampling scope app is rather painful to use compared to the realtime scope app of the time.
Why does youtube allways autoplay now ? - Page 1
Forum section: electronics / general

author: adream
author_rank: Newbie
timestamp: July 22, 2014, 06:28:36 pm
content: been watching the blog for ages, and bloody good it is tooover the last few days I have noticed when i select a video to play from the main video list page it goes into a playlist mode and plays every episode until i kick the thing to bitshas dave altered the way things are or is you tube being an arse ?drivin me nuts:-)
Smarter Every Day - Page 1
Forum section: electronics / general

author: Dongulus
author_rank: Regular Contributor
timestamp: August 30, 2014, 02:07:58 am
content: I just watched the video on EEVblog2 with Destin.Dave, I don't know if you could make it happen, but I would love to see a team up between the two of you.

author: EEVblog
author_rank: Unknown
timestamp: August 30, 2014, 03:51:15 am
content: Quote from: Dongulus on August 30, 2014, 02:07:58 amI'm sure he gets a dozen collaboration requests a month, so probably not going to happen.
Ultra cheap chinese logic analyzer? - Page 1
Forum section: electronics / general

author: Leonelf
author_rank: Contributor
timestamp: June 24, 2014, 02:06:30 pm
content: I foundthislogic analyzer on aliexpress. I would really be interested in a teardown/rant about itIt supposedly has 24MHz and 8 channels XD

author: Legit-Design
author_rank: Frequent Contributor
timestamp: June 24, 2014, 02:16:36 pm
content: https://www.saleae.com/counterfeitQuote

author: Spikee
author_rank: Frequent Contributor
timestamp: June 24, 2014, 02:28:14 pm
content: Quote from: Leonelf on June 24, 2014, 02:06:30 pmI and many friends of mine use that exact model.It just works and is cheap (the 24 mhz mode on multiple channels is a bit wiggly).

author: Leonelf
author_rank: Contributor
timestamp: June 24, 2014, 02:51:39 pm
content: does it use the software mentioned above?

author: MattSR
author_rank: Regular Contributor
timestamp: June 24, 2014, 10:36:33 pm
content: I find the saleae to be great value. The cheap knockoffs are out there by the dozen, but of course the quality is nowhere near the real thing.Saleae are also releasing new analysers with FPGAs and other bits and pieces too, which will make them very hard to copy.
$1 Microscopes - Page 1
Forum section: electronics / general

author: kfitch42
author_rank: Frequent Contributor
timestamp: September 19, 2014, 06:59:33 pm
content: I know this is a bit outside your usual area (the working distance isn't QUITE enough to solder with), but I thought it might make a reasonably enjoyable rant. And, you are the only person I know with a 3d printer (or two).I feel like I see a news article about these every so often, and they sound awesome, but every time I look into it, the article lacks detail and seems WAY over hyped. Could you build/test one or more of these and de-hype it? You seem like you could do a good job calling BS on the $1 claim. How much would you charge to really sell these? My guess is more like $20+.http://availabletechnologies.pnnl.gov/technology.asp?id=393http://www.foldscope.com/?

author: Dongulus
author_rank: Regular Contributor
timestamp: September 19, 2014, 07:43:43 pm
content: What sort of hype have you been seeing? Neither design is going to usher in a new era of medical science, but the real pictures captured using both designs indicate that they work surprisingly well for essentially no money.There is no way anyone is going to get away with selling a piece of plastic and a glass bead for $20, unless if part of some children's microscope kit with some already prepared slides.

author: atferrari
author_rank: Frequent Contributor
timestamp: September 20, 2014, 11:28:08 am
content: Quote from: kfitch42 on September 19, 2014, 06:59:33 pmFirst link: I cannot access the site.Second link: I cannot see images.

author: JoeO
author_rank: Frequent Contributor
timestamp: September 20, 2014, 11:51:48 am
content: The 2 websites work for me.

author: kfitch42
author_rank: Frequent Contributor
timestamp: September 22, 2014, 03:05:11 pm
content: Quote from: Dongulus on September 19, 2014, 07:43:43 pmFor the hype I have read a few news articles talking about how this will revolutionize lab work in 3rd world countries, and stuff like that.For the price, well, building one of these can't be done for $1. You need a 3d printer, and a supply of glass beads to start with. So, the one-off cost is closer to $1000+. If you happen to be in a well stocked lab with the right supplies it might only be $1 worth of materials ... but then you probably don't need it. If you were to try to bring this thing to production... well 3d printing is probably not a good idea, and you need to select the glass beads that are optically good enough (again, doesn't sound like a trivial thing to do in a production environment.

author: Spikee
author_rank: Frequent Contributor
timestamp: September 22, 2014, 09:05:15 pm
content: I almost never use my microscope for soldering. TQFP, QFN, SOIC, MSOP etc just have a decent soldering iron and the correct tip for the job.For soldering for example a msop or tqfp just use decent flux and the drag soldering method works every time. The only time i really use my microscope is to look if there is enough solder on a pin and if there are shorts at those fine pitch chips.
New EEVblog Wordpress comment system - Disqus - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 17, 2014, 03:09:01 am
content: http://www.eevblog.com/2014/06/17/new-eevblog-wordpress-comment-system-disqus/

author: miguelvp
author_rank: Super Contributor
timestamp: June 17, 2014, 03:59:37 am
content: You can get a Disqus account AFAIK I think I have one, (I must, since I don't have twitter, FB etc..)Then again I might have used my GMail, not sure.Edit: Which brings me to question, how honest are those Google OAUTH 2.0 permissions that get displayed, isn't it up to the program to tell you or is actually Google showing you the permissions the application wants access to?Same as FB and Twitter (although I think Twitter uses OAUTH 1.0, OpenID or something older than OAUTH 2.0)

author: EEVblog
author_rank: Unknown
timestamp: June 17, 2014, 04:16:23 am
content: Quote from: wilfred on June 17, 2014, 03:55:00 amYes, I signed up for a Disqus account without any of those.

author: kizzap
author_rank: Unknown
timestamp: June 17, 2014, 04:59:25 am
content: looking at the twitter permissions for it scared me. It allows Disqus to do pretty much anything it wants with your account, including following people, posting as you... just...
One Million Dollar Solar Roadways Challenge - Page 1
Forum section: electronics / general

author: Legit-Design
author_rank: Frequent Contributor
timestamp: June 24, 2014, 05:19:07 pm
content: Ok, maybe not One million dollars.Quote from: EEVblog @ [url=https://www.youtube.com/watch?v=LvYv62X-DD0&google_comment_id=z122fjhywsrtvdskn22ludmy5yitclbtnIf solar roadways can prove Dave wrong and Solar Roadways is viable, Dave will post a public apology telling how wrong he was. Dave will also start working on this project and preach it during that time, wear solar roadways swag, make positive videos about solar roadways saying how awesome they are. Dave will also use his decades of experience in electronics to work for the project. Dave will also start project to turn EEVblog industrial park headquarters walkways and any open areas into solar roadways powered. Since solar roadways are such awesome invention there will be no more power outages in the lab. Dave will also become a positive person, he change his shirt to "I only give positive feedback... Proudly powered by Solar Roadways, Thank You!" With solar roadways logo. These official t-shirts will be sold for 200$ because they are raising money to prove all the naysayers wrong.Dave will also start to make special tutorial videos on how solar roadways science works and how it differs from normal science where you don't have to just believe in something but can prove it yourself instead.Being viable means showing some valid engineering that this thing can do EVERYTHING it says. Valid engineering includes unaltered data and calculations. Since these calculations are going to be very basic any college or even high school class can verify it. Calculations will have to be valid non-pie in the sky type. For example using a time machine to save people and calculating price for those people is not considered valid calculation. Tests will also have to be performed on the materials to determine their suitability for the task.But wait they already got 750k$ to prove it to the government? And 2 Million dollars because they say they have proven it but can't show it yet until they get the money?This is similar to One Million Dollar Paranormal Challenge.

author: Legit-Design
author_rank: Frequent Contributor
timestamp: June 26, 2014, 12:09:21 am
content: Hmm gather the 1 million dollars required for this through Crowdfunding? Indiegogo with Flexible funding! If the whole amount is not raised still get to keep most of the money, that's is win win all the way.
Quick help please . Fluke 287 vs U1253B - Page 1
Forum section: electronics / general

author: fa2ality
author_rank: Contributor
timestamp: December 26, 2011, 11:56:46 pm
content: If you chose between the fluke 287 and the Agilent U1253B which one will you pick.The price difference is only $25 higher for the U1253B.

author: samgab
author_rank: Frequent Contributor
timestamp: December 27, 2011, 01:16:03 am
content: Me personally, I'd go with the Fluke 287.For various reasons, but the key deal breaker for me with the Agilent U1253B is the battery life with that OLED display.

author: samgab
author_rank: Frequent Contributor
timestamp: December 27, 2011, 02:27:18 am
content: In case you wondered what the other, lesser reasons I personally don't like the U1253B compared to the 287 or 289:-I HATE the horrible beep tones.-Placement of the fuses, right under the PCB assembly!-9V battery-Seems less rugged than the Fluke. I may be wrong, but that's just how it seems to me.-It rattles when shaken-Horribly slow continuity response.-Very slow auto ranging.-Doesn't have any graphing for the logged data.

author: Richard W.
author_rank: Regular Contributor
timestamp: December 27, 2011, 02:04:43 pm
content: the battery lifetime in the 287/289 is 12 times longer, the TempCo is better (lower) and the display is readable in the sun.

author: Lennos
author_rank: Newbie
timestamp: June 13, 2014, 08:50:46 am
content: Yes but at twice the price AUD$1030 vs AUD$562 here in Australia the cost of the Fluke can't be justified. I am struggling to justify the price of the Agilent but it is definately better bang for buck.

author: nanofrog
author_rank: Super Contributor
timestamp: June 13, 2014, 07:21:38 pm
content: Why not consider the U1252B in place of the U1253B?It's less expensive, better battery life and no OLED to be concerned about.As per continuity, I've found ~1.5 seconds on default settings is what's needed to get a good solid tone (U1252B), and there's a trick to speed it up based on another post I've seen here (set it to 50Ohm range).Auto ranging isn't bad either IMHO.Not sure what you're meaning is about the fuses, as the fuse holders are soldered to a PCB.Rattle is the 9V battery, so that exists. I find it's not a problem for me, but I don't make a habit of shaking my meters (it's not a blender after all).Does not graph as mentioned, so a computer will be required to generate one unless Max/Min or Peak values are all you really need (FWIW, you can also scroll through all the logged values).It's not perfect, but it is very usable. Same for the Fluke. Each have their pros and cons, even in this segment (technical as well as subjective elements to the features).That said, if I were buying my first 50k count DMM, I'd go for a Brymen BM869.Much better value over either Fluke or Agilent.Heck, I still want one (have a U1252B and a BM857), and am hooked with Brymen (the build quality and feature set are excellent, and cost makes them even more attractive).
NSA / General conspiracy nuttery episode. - Page 1
Forum section: electronics / general

author: Legit-Design
author_rank: Frequent Contributor
timestamp: June 12, 2014, 04:59:53 am
content: Put on your tinfoil hats. In this episode Dave becomes a conspiracy nut! He hunts around the lab for hidden NSA bugs. With his internet superhero electronics skills he cracks open devices and cords looking for NSA injected hardware bugs. Because you never know, it's always hidden where you least expect.I don't think the NSA card has been milked enough.
Connecting CVCC supplies in parallel and series - Page 1
Forum section: electronics / general

author: saturation
author_rank: Super Contributor
timestamp: June 12, 2014, 11:42:15 am
content: Connecting 2 constant current - constant voltage adjustable linear power supplies in series or parallel has been done for decades. However, I read on threads some folks are not aware of the dynamics between the 2 channels when they are connected this way, particularly in parallel.It would be good to review it because a supply capable of series-parallel connection with few restrictions, makes it far more flexible in one's lab than one that isn't.You can show the flow of current from one channel to another, discuss how the regulator circuits respond and balance between themselves. The effects of setting the voltage between both channels close together, slightly apart, and far apart, and the response of the circuit, and finally how to manually balance both channels to share the current load.You can show first a single multiple output supply like the DP832 sharing two channels, then adding yet another model CV-CC supply as a third channel to further boost the current or voltage, and then even a 4th or more as you please.
Dave designs a chip, possibly first crowd funded manufactured chip* - Page 1
Forum section: electronics / general

author: Legit-Design
author_rank: Frequent Contributor
timestamp: June 05, 2014, 02:56:02 am
content: http://www.theamphour.com/201-cheap-respins-and-a-time-machine-multiscience-mercenary-marketplace/https://www.efabless.com/eFabless is a new service for sharing a wafer and getting low cost custom chips. The low cost is the result of excess capacity.It uses an online compiler called Yosys, the author of which was on our subreddit.eFabless is a new service for sharing a wafer and getting low cost custom chips. The low cost is the result of excess capacity.It uses an online compiler called Yosys, the author of which was on our subreddit.Multimeter chip with everything included for that crazy multichannel multimeter concept.?Maybe time to try out Indiegogo Flexible funding? A continuum for other crowdfunding campaigns done on Pozible and Kickstarter, now the second biggest player Indiegogo?*Jeri is going to do it first, but she has done it before and technically not fully custom chip?

author: orion242
author_rank: Unknown
timestamp: June 05, 2014, 03:10:52 am
content: I thought Dave was going to print chips?

author: ludzinc
author_rank: Unknown
timestamp: June 05, 2014, 03:20:14 am
content: Can eFabless provide mixed signal?If no, then the meter chip is a no...

author: SeanB
author_rank: Super Contributor
timestamp: June 05, 2014, 04:39:07 am
content: Quote from: orion242 on June 05, 2014, 03:10:52 amChris wants the chip printer.....

author: nathanpc
author_rank: Unknown
timestamp: June 07, 2014, 02:16:12 pm
content: Quote from: ludzinc on June 05, 2014, 03:20:14 amI think Chris mentioned they couldn't do mixed signal, but I'm not 100% sure.

author: Legit-Design
author_rank: Frequent Contributor
timestamp: June 07, 2014, 04:09:52 pm
content: Look at their page:https://www.efabless.com/Mixed Signal Devices• We design Analog/Mixed Signal Integrated Circuits & Systems.If that's not true then it's some very misleading advertisement. I think they can do analog/mixed signal, but it's just not that trivial to do analog as it is digital, mostly because "Everyone can count to one!"
New forum feature - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: May 06, 2014, 10:53:53 pm
content: Install a mod that allows direct naming of users using @, like this:@peter.mitchellhttp://custom.simplemachines.org/mods/index.php?mod=3860

author: elgonzo
author_rank: Unknown
timestamp: May 06, 2014, 10:59:08 pm
content: For a moment i thought you kicked Simon...

author: jeremy
author_rank: Super Contributor
timestamp: May 06, 2014, 11:13:33 pm
content: Naing = naming. Twitter style.

author: FrankBuss
author_rank: Unknown
timestamp: May 06, 2014, 11:18:59 pm
content: Quote from: jeremy on May 06, 2014, 11:13:33 pmor broken 'm' key

author: Stonent
author_rank: Super Contributor
timestamp: May 07, 2014, 06:05:15 am
content: I had an old boss who had a friend that lost a finger. He said whenever this friend would type an e-mail, the friend would purposely leave a blank space in the word for whatever key that finger would have pressed.

author: peter.mitchell
author_rank: Super Contributor
timestamp: May 07, 2014, 02:49:20 pm
content: Quote from: EEVblog on May 06, 2014, 10:53:53 pmCheers cobba!
Fundamentals Friday ideas - Page 1
Forum section: electronics / general

author: Chad1
author_rank: Contributor
timestamp: May 29, 2014, 05:14:52 am
content: Over time I've thought of a few topics I wish I knew more about, and I think they'd make for good Fundamentals Friday videos. I know some of these topics are vast enough to warrant their own dedicated courses, but obviously the intention would be to provide a general overview, not cover every little thing.1) Interface standards/devices---> Why they're necessary, when they're required in a design, popular applicationse.g. RS-232, RS-485, CAN2) DACs / ADCs---> It seems like every other EEVBlog teardown features a DAC or ADC. Dave mentions them as if they're child's play and never expands on them. Even when it's the central element of a circuit, he'll say "Well it'll just be a DAC with some other passives and maybe a micro if they're fancy. Boring as bat shit." I never learned about them in college, so I'd love to understand them to the point of them being boring.3) Bootloaders / Getting started with un-programmed micros---> I feel like a large portion of young hobbyists/students aren't aware of all the extra work needed to implement a microcontroller into a design. I know schools use pre-programmed micros so students never really have to worry about it. I've personally scrapped many ideas because they end up requiring a micro and I have no clue how to get to the point of being able to write code to it. I think it would be nice to have a video explaining how to approach un-programmed micros, i.e. getting to the point where you can load your code onto it. Certainly could employ demos as well.If you know of any videos already out there which effectively explain any of the above, then please respond with them. But I still think Dave could do a great job at tackling these topics.

author: dreaquil
author_rank: Regular Contributor
timestamp: May 29, 2014, 11:13:53 am
content: Another good fundamental friday video would be a DDS video as theres very little information I can find about them
Video on why specific voltages are standard? - Page 1
Forum section: electronics / general

author: Jarrod Roberson
author_rank: Regular Contributor
timestamp: April 06, 2014, 08:59:48 pm
content: There are lots of standard voltages, where did they come from? What is the true reason that 5V was picked? Why 3.3V? How about 1.8V?Might not be a long video but it would be educational either way!

author: mariush
author_rank: Super Contributor
timestamp: April 06, 2014, 09:14:09 pm
content: See this thread, a few of the things you ask were discussed here:https://www.eevblog.com/forum/chat/so-why-ttl-logic-uses-5v-again/
Vintage GSM Brick Teardown - Page 1
Forum section: electronics / general

author: SubSonic
author_rank: Newbie
timestamp: April 04, 2014, 07:39:35 pm
content: Got my hands on an Motorola International 1000 which is quite a GSM phone brick from the early 90's.I would like to donate this to a Teardown Tuesday.Please tell me if there is any intrest in this as shipping this thing from germany over to aussie land is quite expensive.-Markus
Noise shaping, sigma-delta, and how GPS is even possible - Page 1
Forum section: electronics / general

author: alexwhittemore
author_rank: Frequent Contributor
timestamp: March 23, 2014, 01:15:48 am
content: I have a slightly-better-than-basic idea of how noise shaping works, specifically in relation to sigma-delta converters, but I could use a clearer, dummy-version refresher. Especially I'm curious about noise as it relates to GPS, where the noise power is actually higher than the signal. Does GPS receiving even use the same kind of noise shaping to achieve the goal? How does it actually work? I know this would be valuable to me, and I'm guessing most others, especially hobbyists but probably a good number of pros, aren't particularly familiar either.
is there a way to unsubscribe from a thread? - Page 1
Forum section: electronics / general

author: linux-works
author_rank: Super Contributor
timestamp: March 19, 2014, 04:25:53 pm
content: for some reason, I can't locate this option on this forum software. I automatically get subscribed to threads I post in, but how can I control this better?I will usually watch the threads I post in but sometimes I just want to suppress one or two threads so that it does not show up on my 'unread' list. is there a way to do that?

author: kripton2035
author_rank: Super Contributor
timestamp: March 19, 2014, 04:43:07 pm
content: would like to know that too !

author: BravoV
author_rank: Super Contributor
timestamp: March 19, 2014, 04:49:07 pm
content: At forum profile, in the "Modify Profile" menu, select "Notifications" sub-menu, un-tick the "Turn notification on when you post or reply to a topic.".The word "Notification" in this SMF forum is called "thread subscription" feature at other popular forum out there.

author: krivx
author_rank: Frequent Contributor
timestamp: March 19, 2014, 04:50:34 pm
content: There is a "notify" button next to "reply" in each thread, I believe you can also double-toggle this is in a thread you wish to subscribe from.

author: apelly
author_rank: Unknown
timestamp: March 19, 2014, 04:51:07 pm
content: And a link in each email.Also, subscribed threads have an un-notify button, instead of a notify one. Something like that anyway.

author: apelly
author_rank: Unknown
timestamp: March 19, 2014, 04:53:15 pm
content: But yea, finding your subscriptions is a PITA with this software.

author: kripton2035
author_rank: Super Contributor
timestamp: March 19, 2014, 05:15:33 pm
content: in fact, I can unsubscribe from a thread I have subscribed before. : just clic the notify - unnotify buttonbut when I answer to a thread, I always get all the answers after that, and yes sometimes, in a long thread, when everything has been said, or that the actual content of the thread is far away from the original subject, I want to unsubscribe : then I cannot because I dont have a un-notify button to do it.

author: linux-works
author_rank: Super Contributor
timestamp: March 19, 2014, 05:30:50 pm
content: guys, I don't see this. I see notify as an EMAIL notifier, but it does not remove you from seeing new thread updates in your 'unseen threads' view.I use that view as my starting page, to see if there are new posts to threads I also posted in. but I need to be able to remove that flag on various topics. it seems there is no way to do that. I don't get email notifies and the notify button just allows ADDING you, not REMOVING you.maybe dave can comment if he sees this thread. noise mgmt is important when you are active in a forum and have many threads you have posted to

author: apelly
author_rank: Unknown
timestamp: March 19, 2014, 05:39:47 pm
content: Ah. I see what you mean. My solution is email notification of subscribed threads. I do not look at page you're referring to.
Driving Solenoid with current controlled PWM - Page 1
Forum section: electronics / general

author: Rudolfo
author_rank: Contributor
timestamp: May 01, 2014, 08:42:03 pm
content: Interesting to see how a 5V coild can be used on 12V or 24V by using current controlled PWM rathern then normal valtage controlled one, or how to drive bistable relays, valves or lifting magnets in the application: Flexible and Low Power Driving of Solenoid Coils -http://ichaus.biz/wp8_whitepaper_en.

author: SL4P
author_rank: Super Contributor
timestamp: May 02, 2014, 07:52:52 am
content: One technique used for both a rapid 'pull-in action' as well as saving power dissipation... is to drive the relay/coil/solenoid at rated voltage for some initial period - say 50ms - then drop back to the specified hold-in voltage (or equivalent PWM) as long as the PWM doesn't make the core resonate. Turn the supply back to 0% to release.
Portable Mini Tektronix Scope Teardown Please - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: March 12, 2014, 10:07:58 am
content: A long time ago a mini Tektronix scope arrived in the mailbag, any chance of doing a teardown on this rather than new stuff such as the power analyzer?

author: Andy Watson
author_rank: Super Contributor
timestamp: March 12, 2014, 11:57:47 pm
content: What are you expecting to see? It will be much like a big scope, ... only smaller !Here is a wee teaser. This is a 222A, the digital cousin of the mailbag Tek. The board at the back, with the 5 pin edge connector is the processor board - not much to see - it is standard processor stuff. The board that lies parallel contains the power supply inverter/converter - it supplies all the low voltage rails, the heater for the crt and the high-voltage (via a tripler) for the cathode. (I really should have taken more photos whilst it was naked). Both of these boards sit on the mother board - some of which can be seen under the crt. The mother board regulates the primary power supply, the battery supervision and provides isolated power and control signals for both acquisition channels.The acquisition board, which is lying flat on the table in the photo, is quite interesting. To the front is an FPGA that performs some sort of overall care-taking function. The remain of the board, from the label onward, contains two identical acquisition channels. The two PLCC devices perform timing and control for the data transfer (to the mother board). At the very back, the blue and white units are the infamous Tek hybrids - ceramic substrate, DIP package, containing attenuator and (I think), the white square chunk is the ADC. Hidden under the hybrids are several relays which complete the attenuator and perform AC/DC coupling.Down the centre of the board are five grey blocks retained with spring clips. These are data transformers for communicating the data back to the mother/processor board. The grey blocks are the ferrite cores of the transformers, these puncture the PCB and mate with identical blocks on the other side. The windings of the transformer are etched as part of the PCB. This side is channel 1, the reverse side in channel two. A third winding, for collecting the data is etched in the middle layer of the board (these are multi-layer boards and the channels share the data transformers.)If there's enough interest I'll post some more details of the repair/tear-down, although, it's probably another thread.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: March 13, 2014, 03:11:27 am
content: That tube shield is so hot. Like a vacuum tube latex suit.
Blog suggestion:  Highside vs low side loads on transistors. - Page 1
Forum section: electronics / general

author: george graves
author_rank: Super Contributor
timestamp: March 05, 2014, 07:40:45 am
content: High-side vs low-side loads on transistors.Thanks Dave!

author: zapta
author_rank: Super Contributor
timestamp: March 11, 2014, 04:16:06 pm
content: +1+ driving power mosfets.

author: gregallenwarner
author_rank: Regular Contributor
timestamp: March 11, 2014, 04:28:02 pm
content: I second the power MOSFET's suggestion.
Transcripts - Page 1
Forum section: electronics / general

author: mboich
author_rank: Contributor
timestamp: March 03, 2014, 05:23:52 pm
content: Dave,Have you considered creating transcripts of your episodes? Once indexed by Google, those would be a great resource, and might also create new inbound traffic for you. I know a major video training site that did this and was very happy with the results. (I don't know what tools exists to make this easy, but I'll bet there are some.)

author: SeanB
author_rank: Super Contributor
timestamp: March 03, 2014, 06:00:54 pm
content: If you can strip out the subtitling ( and correct it to actually be something close to what is being said, seeing as it makes a dog's breakfast of electronics terms, and especially of non USA accents) you can post it in the episode thread on the forum.

author: mboich
author_rank: Contributor
timestamp: March 03, 2014, 10:16:48 pm
content: Ah, I see that it's already there! I just wasn't sufficiently familiar with the finer points of YouTube.

author: hikariuk
author_rank: Unknown
timestamp: March 05, 2014, 04:34:08 am
content: A potentially added bonus of correcting the transcript by hand would be Dave could then use it to put correct subtitles in place on the video. You can either do a straight transcript, which uses speech-detection to work out where each line is, or you can use one of the timestamp based subtitle formats to tell it where to put each line.
full review and teardown of rigol ds10074z/z-s - Page 1
Forum section: electronics / general

author: electronics man
author_rank: Frequent Contributor
timestamp: February 17, 2014, 10:17:43 pm
content: I know there are people who have done bits before and you have looked at it briefly but it would be nice if you could do a full review and teardown on of a ds1000z or z-s, I would do one if i could but i dont have a good camera, we would be very greatfull.

author: GraphicArmy
author_rank: Newbie
timestamp: February 20, 2014, 11:50:41 pm
content: I would love to see a teardown of the Rigol DS1000z vs DS2000A-S model too.Here is the video Dave has done about the DS1000z model.EEVblog #522 - Rigol DS1000Z Oscilloscope Quick Look

author: kizzap
author_rank: Unknown
timestamp: February 21, 2014, 01:56:11 am
content: Is there any real reason why we need a full tear-down of the DS1**4z series? I very much doubt that there will be any fundamental difference between it and the DS2**2 series. The power supply will be the same. The controls will be fundamentally the same. I very much suspect that the inputs will just be a second copy of the input for the 2-channel scope, Fed into the same DSP chip.The only thing thatmightbe interesting is the logic analyser. Even then, I would suspect that it would be a single chip solution, so not really much new content there.just my $0.02

author: GraphicArmy
author_rank: Newbie
timestamp: February 23, 2014, 02:32:41 am
content: Yes, but a lot of new comers would like to see Dave talk about DS1000z vs DS2000A-S. Wish one he would purchase for his first scope.

author: MatCat
author_rank: Frequent Contributor
timestamp: February 23, 2014, 02:43:07 am
content: Mine comes Monday, I really wish Dave would give it a good full review too.
Bug in displaying long nick ? - Page 1
Forum section: electronics / general

author: BravoV
author_rank: Super Contributor
timestamp: February 22, 2014, 03:15:26 am
content: Dave, this is getting intense lately from new comer in this forum, is there any thing can be done to fix this ?Or you can use your admin power to intervene by directly changing the underscore "_" to space character " " so the nick can wrap down when forum displays it in post created by that nick owner, its quite annoying.

author: _I_am_an_attention_whore_
author_rank: Newbie
timestamp: February 22, 2014, 03:16:53 am
content: Hi, see my nick there ? Bragging cool right ?

author: vk6zgo
author_rank: Super Contributor
timestamp: February 22, 2014, 03:25:10 am
content: Quote from: _I_am_an_attention_whore_ on February 22, 2014, 03:16:53 amIf you removed the "I am",the problem would go away.We will assume by default that you are talking about yourself,not someone else.

author: BravoV
author_rank: Super Contributor
timestamp: February 22, 2014, 03:25:29 am
content: Yep, created above nick for Dave to exercise with nick modding, do what ever you like and just delete it once you're done.

author: GeoffS
author_rank: Unknown
timestamp: February 22, 2014, 07:08:04 am
content: Currently, user name has a maximum length of 30 characters. This is in the code and in the databaseIt's a simple enough change to make, the database field could be left as is and just the code changed. I did this in a test SMF setup I have.Even though it's a straight forward change it means one more thing that is non standard when it comes time to upgrade SMF or to install a mod. Testing would need to be done to make sure everything continues to work as it should.Correction: Two places, apart from registration there's also the section that allows users to select their own screen name. Screen name can be longer than user (login) name.
Teardown a BioLite camp stove that utilizes the Seebeck effect - Page 1
Forum section: electronics / general

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 16, 2014, 07:03:28 pm
content: Teardown a BioLite camp stove that utilizes the Seebeck effect.http://www.biolitestove.com/It's right up your alley Dave and maybe you have one already??

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: February 22, 2014, 03:26:37 am
content: Alright maybe not such a good idea. I still really like this stove. For two reasons.1. It has a fan that essentially makes this stove into a furnace that produces heat efficientlyjust from twigs, pinecones and other easy to find debris.2. You can charge your phone,gps, ereader or power a light.
About designing switch mode bench power supply  - Page 1
Forum section: electronics / general

author: yashrk
author_rank: Frequent Contributor
timestamp: February 13, 2014, 10:54:39 am
content: How about designing a switch mode power supply like usupply which could be more efficient, compact and have option of current, voltage control with some programming goodness like tracking battery charge time and.., it would be awesome stuff to learn andI guess people also like the power supply videos very much as they are in most viewed list.Even if Dave didn't design the hole thing still video on current and voltage control in SMPS will be helpful for new player (like me)Thank You for your videos Dave, you are awesome..

author: Rerouter
author_rank: Super Contributor
timestamp: February 13, 2014, 11:17:11 am
content: to a point the lower the switching frequency, the higher the efficiency, but the more filtering it will take to bring the noise down to a similar level, equally your inductors and capacitor sizes will be bigger, so its a trade off,for a variable input you will find many designs, but for variable input and output, you will be more likely to find a boost-buck arrangement, where its first boosted to above your rated output voltage, then bucked down to your desired voltage, this allows you to fight one battle at a time rather than trying to make a single sepic converter with a wide input and output (it seems hard from my own experiences, but i could be wrong)and then there is the fun of layout, switchers can make nice EMI noise sources if the layout is not relatively tight and compact, with no stubs or dead copper,or at-least that is my 2c,
Suggestion: Pitfalls and quick tets: AC/RMS/power measurements - Page 1
Forum section: electronics / general

author: rr100
author_rank: Frequent Contributor
timestamp: March 11, 2014, 09:11:49 am
content: There are many pitfalls when trying to characterize some non-constant voltage/current with a single value. Some theory from Dave plus some specific tests would be welcome:- how the cheap multimeter (peak-to-peak divided by 1.41) work and why you can measure some 1A current from a mains powered device that's in standby and obviously doesn't eat hundreds of watts- why you can't rely on separate current and voltage values to calculate the power even if both are provided by good instruments (I assume some basic DC-DC supply or even DC->nasty waveform might be a good example)- what are the industrial instruments like metrawatt or whatever doing and how can they be fooled (what we know about how they sample the values and how this can not work so well in a real circuit). I have no idea actually about how they work, although I can just imagine but don't know details; are they sampling with a very high frequency, are they doing some analog filtering/averaging before, etc.