hybridfree/eevblog-posts huggingface dataset:
USB Microscope Eval Request - Page 1
Forum section: electronics / general

author: fishntools
author_rank: Newbie
timestamp: February 14, 2012, 05:21:06 pm
content: Hey Dave,Would you please consider doing a technology/ product review specific to USB Microscopes (<$100.00) to help those of us with limited budgets trying to utilize SMD's at home? (We can feel them but not see them, let alone tell you the color or finish of the solder joint!)The h/w associated with this instrument would also translate nicely to the subject of digital imagery applications (e.g. QR Codes).Appreciate your shows and efforts,Fishntools

author: SeanB
author_rank: Super Contributor
timestamp: March 04, 2012, 02:54:52 pm
content: I did buy a Celestron USB microscope recently. Pretty much looks like all the rest, and I bought on price, looked at the cheapest price and ordered from a local ( in country) supplier. Don't know about the software it comes with ( XP only and I am using Linux) but settled on Cheese as a good capture software ( button on camera not supported, but it would not make a stable image anyway if pressed) and a reasonably good cheap 1280 by 1024 captured image. Nice thing about Debian is there are a lot of image capture utilities to choose from, most are good.Attached is a sample I took this year, I often use it just as a magnifier to look at SMT components, makes it easy to see those tiny markings, my eyes are not what they used to be, or the writing has gotten smaller.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: March 04, 2012, 03:37:24 pm
content: Search Youtube for "USB Microscope Review" - there are quite a few vids there already
Topic Rating installed - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: March 01, 2012, 10:59:12 am
content: I've installed a topic rating package.It allows everyone to rank each topic from 1 to 5 stars, and also see the most popular topics.The stars will show up in the board index (optional)Let me know if you do or don't like it.Also a better formatted recent posts section on the main page.Dave.

author: PeterG
author_rank: Frequent Contributor
timestamp: March 02, 2012, 10:08:44 pm
content: Hi Dave,i am not seeing any change to the board so far.Regards

author: firewalker
author_rank: Super Contributor
timestamp: March 02, 2012, 10:22:51 pm
content: Neither do I.Alexander.

author: EEVblog
author_rank: Unknown
timestamp: March 02, 2012, 10:29:25 pm
content: Hmm, let me look into that, perhaps only an admin can see or something.There should be 5 big rating stars above each thread.Dave.

author: EEVblog
author_rank: Unknown
timestamp: March 02, 2012, 10:34:46 pm
content: Ok, think I fixed it, can anyone see the rating bar now?You won't see it in thread you created, but any other thread should have 5 stars at the top you can click and rate that thread.The stars should also show up on the board index too.Dave.

author: PeterG
author_rank: Frequent Contributor
timestamp: March 02, 2012, 10:40:38 pm
content: Nup, i am still not seeing stars.......

author: PeterG
author_rank: Frequent Contributor
timestamp: March 02, 2012, 10:42:21 pm
content: Seems to be working now.But not on the board index yet.

author: EEVblog
author_rank: Unknown
timestamp: March 03, 2012, 12:54:07 am
content: I see it on the board index (only for those threads that have been rated), but disappointingly not on the "unread posts" page.Dave.

author: metalphreak
author_rank: Frequent Contributor
timestamp: March 03, 2012, 05:52:31 am
content: https://www.eevblog.com/forum/index.php?action=ratingInteresting(the little pie chart icon links there)
VBLOG Suggestion - PSoC - Page 1
Forum section: electronics / general

author: JVR
author_rank: Regular Contributor
timestamp: March 22, 2012, 10:35:34 am
content: Hi,I tried looking at these, but not a lot of info is available on the net as to where they get used, benefits, special useses etc.Any chance you can do a short blog on there Dave?Cheers,Daniel from ZA

author: hans
author_rank: Super Contributor
timestamp: March 26, 2012, 09:05:01 pm
content: I guess they are just an CLPD/FPGA with a microcontroller. I think an episode on a FPGA/CLPD in combination with a microcontroller(or softproccesor) itself is very interesting to watch!
Work Flow is so Important! - Page 1
Forum section: electronics / general

author: Richard Goodrich
author_rank: Newbie
timestamp: February 19, 2012, 04:37:48 am
content: I love getting 80% of the benefit for 10% of the bucks! I have been a EE for 37 years and have most enjoyed working for the small mom & pop company. Like being a big fish in a little pond you could say!And I have found what I call work flow critical and documenting it - because I wear a lot of hats, am getting old and the memory is going!Every tool, software or hardware has bugs and ways in which it works better than other ways. This is what I call work flow! I would like to hear Dave talk about his experience with this!

author: Rerouter
author_rank: Super Contributor
timestamp: February 19, 2012, 05:15:03 am
content: and how unless you really know your stuff that last 19.9% of the benifits costs 150% of the bucks,

author: Bored@Work
author_rank: Super Contributor
timestamp: February 19, 2012, 10:35:48 am
content: Quote from: Richard Goodrich on February 19, 2012, 04:37:48 amWe know, you happen to tell us this in every of your postings.
AC/DC Adapters - Suggestion: Can you do a video on AC/DC Adapters - Page 1
Forum section: electronics / general

author: TymerTopCat
author_rank: Newbie
timestamp: February 15, 2012, 09:12:07 am
content: AC/DC Adapters are everywhere.I would love to see you "Crack open" some AC/DC adapters. Give us the low down on these things. Which ones are junk, which ones are good. Some of these things take power even when they not powering anything, others seem to take a small amout of power.-Russ in (Las Vegas, NV)
Compromising Electromagnetic Emanations of Wired and Wireless Keyboards - Page 1
Forum section: electronics / general

author: diracshore
author_rank: Regular Contributor
timestamp: January 28, 2012, 01:49:25 am
content: Hi Dave,I enjoyed reading thishttp://infoscience.epfl.ch/record/140523/files/VP09.pdfThe USRP is a big topic, also the biconical antenna used and the sampling technique. Fractal antennas are a pretty fun topic too.Love the video blogs ! Keep up the good work !
Flattr.com for donations - Page 1
Forum section: electronics / general

author: bitschubser
author_rank: Newbie
timestamp: January 24, 2012, 08:06:33 pm
content: Hi David,thanks for all the inspiration and entertainment! Did you ever consider flattr.com as a donation method? It's quite popular with bloggers and podcasters here in Europe. You would definitely earn a place in my monthly subscription list :-)BRbitschubser

author: Chet T16
author_rank: Frequent Contributor
timestamp: January 24, 2012, 08:43:37 pm
content: Theres a flattr link on the front page

author: bitschubser
author_rank: Newbie
timestamp: January 24, 2012, 09:40:52 pm
content: Ups... :-) Looks like I have been distracted by the cute baby. Thanks ChetAnyway, happy I can flattr David :-)Cheers
Video Blog suggestions PCB Layout Rule of Thumbs. - Page 1
Forum section: electronics / general

author: CreoNic
author_rank: Newbie
timestamp: February 16, 2012, 02:54:30 pm
content: Hi,I just watched your resent video blog that showed us how you layed out your uSupply PCB.I liked your rule of thumb suggestion to approximate 500mA per via.Maybe you can do a followup video with some rule of thumb suggestions when laying out a PCB?Especially how to think about separating digital and analog ground to make a quiet design.Here are some bullet point question that I have:1.Can I put a ground polygon on the top as well as the bottom plane? Whats the benefit and drawback with doing that?2.Ground loop should be avoided. How do you implement that? Is a star shaped power layout best or maybe a L-shaped power layout? If you use a ground polygon is it best to only connect the ground polygon at one place or can you connect them at several places with respect to creating a ground loop antenna?3.Whats the rule of thumb when you need a component leg to fit in a drill hole.Say your component data sheet say the leg is 1mm in diameter. How big should the drill hole be to take into account the trough hole plating and allow solder to run trough to the other side? (For a two layer PCB)4.EMI filters are a good design practice to implement on your outgoing/incomming connectors to reduce emitting/received noise in your design. Maybe talk a little about that.5.Electrolytic capacitors are a good design practice to use for power input on your PCB. Its also a good practice to have electrolytic capacitors at strategic length along your power supply traces. (I heard of a rule of thumb of 22uF capacitor near a CPU if power trace is longer than 15cm.) Don't know if thats a rule of thumb. Maybe talk a bit about that?Best RegardsNiklasSweden

author: EEVblog
author_rank: Unknown
timestamp: February 19, 2012, 08:02:33 am
content: One of my plans is a complete series of video tutorials on all aspects of PCB design.But this is a massively serious undertaking....So ok, it's not a plan yet, it's a ideaDave.

author: george graves
author_rank: Super Contributor
timestamp: February 19, 2012, 08:39:28 am
content: How about a PBC design contest? You could "crowd source" your next design?

author: Shale
author_rank: Contributor
timestamp: February 22, 2012, 03:49:11 pm
content: I would love a series of videos on this.

author: steve_w
author_rank: Regular Contributor
timestamp: February 22, 2012, 08:14:52 pm
content: Great idea, looking forward to it

author: Christe4nM
author_rank: Unknown
timestamp: February 23, 2012, 04:59:16 pm
content: Quote from: EEVblog on February 19, 2012, 08:02:33 amPlease do, would be great!
a Data Acquisition System/Data Logger for $30 using an Arduino (and a PC) - Page 1
Forum section: electronics / general

author: ShortZircuit
author_rank: Newbie
timestamp: January 09, 2012, 08:41:03 pm
content: Hi Dave,I think you could get excited about this...I ran across it in EDN Mag a few weeks ago. Using an Arduino and a PC (and the free LArVa software) you can make a 17 channel data logger! (6 Analog & 11 Digital).Here is the User Guide;http://angstromdesigns.com/files/UG01_InstallingLArVaForWindows_revA.pdf& the free LArVa software;http://angstromdesigns.com/index.php?page=shop.product_details&category_id=6&flypage=flypage.tpl&product_id=20&vmcchk=1&option=com_virtuemart&Itemid=86Here is a link to a quick tutorial on how to zoom in the graph;http://www.angstromdesigns.com/software/faq/111-how-do-i-zoom-in-using-larva-simple-graphThey also offer a very nice App Note for measuring temperature using a $3 temp sensor;http://angstromdesigns.com/index.php?option=com_content&view=article&id=83&Itemid=74Here is a short article about LArVa, as written up in Test and Measurement World:http://www.tmworld.com/article/519857-Build_a_DAQ_system_for_about_30.phpHope you find it 'Blogworthy', Dave,God bless!P.S. To save your data, hit STOP (ignore the ‘Save’ tab!) and right-click on the graph and go down to "Export".

author: Mechatrommer
author_rank: Super Contributor
timestamp: January 10, 2012, 02:14:31 pm
content: can really this kind of thing makes money?
LeCroy Wave Ace 112 review - Page 1
Forum section: electronics / general

author: im_a_human
author_rank: Regular Contributor
timestamp: December 31, 2011, 08:48:50 pm
content: Hi Dave, i was wondering if it would be possible for you to get a LeCroy Wave Ace 112 in for a review and perhaps a tear down. I think this could be a rival for the entry level Rigol and other entry level scopes out there and im interested to see how it stacks up. Im planning to buy my first DSO soon and there arnt really any reviews on this model on the net and you only have the manufacturers specs to go on so it would be very interesting i think to see how it performs in the real world.Thanks, Nick

author: amspire
author_rank: Super Contributor
timestamp: December 31, 2011, 10:50:14 pm
content: These scopes are not new, and are not up to the standard of a Rigol DS1xxx series- they are only 500MS/S and have no long memory. They are sort of the generation-before-the-Rigol scopes at 4 times the price.Probably not much design input from LeCroy either - they would have been largely designed in China or Taiwan and then purchased and rebranded by LeCroy.Who would want to buy one?

author: olsenn
author_rank: Frequent Contributor
timestamp: December 31, 2011, 11:26:29 pm
content: I got a WaveAce102 FREE from LeCroy simply by asking them if they had anything they would be willing to donate. I'll agree that it isn't up to par with the Rigol and is no where near what it sells for, but I like the little touches (such as dedicated amplitude knobs for each channel) and the firmware is better. Amspire is correct in stating that these scopes are not made by LeCroy... they are rebadged (probably Atten) and feel even cheaper than the Rigol (I own both). Stick with a DS1102E for $399... it can't be beat!

author: im_a_human
author_rank: Regular Contributor
timestamp: January 01, 2012, 04:05:07 pm
content: Thanks for your advice guys, im quite shocked the outdated Lecroy is so expensive compared to the Rigol so i wont be looking at Lecroy any more.
Test jigs , simulators or whatever you want to call em. - Page 1
Forum section: electronics / general

author: pickle9000
author_rank: Super Contributor
timestamp: January 27, 2012, 02:50:31 am
content: So I am new here (first post) I do not have an EE degree, I'm retired after a long career in the repair industry. It was all commercial / industrial stuff. Primary focus was in the railway industry.So to the point, test jigs, in my business where a massive benefit. They increased quality and helped prevent technician mistakes. I always made two styles, one for diagnostics the other for burn in. One way to lose a customer is to send them faulty gear. While a temp probe needs no burn in, a sequencer for a piece of heavy equipment or a temp controller for a deep fryer does. Most important is to generate errors and check if all the safety features working.Of course for me this was exclusively for repair purposes. I would think that for design it would be equally critical.I'd like to see your take on this one Dave....mike

author: McMonster
author_rank: Frequent Contributor
timestamp: January 27, 2012, 05:33:13 pm
content: Dave did something like this in#216, but I'd like to see more too.

author: pickle9000
author_rank: Super Contributor
timestamp: January 28, 2012, 04:53:45 am
content: Yea, 216 was the resistor probe one. Simple and effective. I have no problem with hand testing as long as it pays. That said, test jigs and automated sims are available to heavy equipment mechanics in the railway industry. They are used to get the equipment up and running as fast as possible.I've seen ones supplied by the manufacturers and some are simple, plug in a hand controller and make the lights go on and off. They range all the way up to very computerized systems. Often built into the on board controls if it's computerized. When you consider price these things can be killers....mike

author: vk6zgo
author_rank: Super Contributor
timestamp: January 28, 2012, 06:23:44 am
content: They usually do "pretend"ones on a computer & hope for the best,these days!VK6ZGO

author: pickle9000
author_rank: Super Contributor
timestamp: January 28, 2012, 08:13:56 pm
content: It would be very interesting to see failure rates for "out of the box" items.I remember one customer sending us a dozen boards that where DOA. He sent them to us instead of returning them to the OEM because he needed them running and couldn't wait for the OEM turn around. Turned out to be a transistor with the base and emitter swapped (kinda sad). Now it showed up on our test jig immediately, what about the OEM? I still have no idea what happened. On a brighter note I made a customer very and he showed his appreciation by sending in more items for repair....mike
Multimeters at Sparkfun - Page 1
Forum section: electronics / general

author: drewtronics
author_rank: Contributor
timestamp: December 30, 2011, 05:06:21 am
content: Dave:Any interest in reviewing/tearing down these?:http://www.sparkfun.com/products/10892orhttp://www.sparkfun.com/products/9141I fully expect these meters to be complete crap. It really frustrates me that a big name (like them or not, they're big in the arduino/hobbyist community) like Sparkfun try to pass off cheap chinese crap to a crowd that typically trusts their judgement (rightfully or not). Somebody needs to stand up and make sure that people aren't being ripped off. They even go so far as to claim that the $15 multimeter "works well for measuring very small amounts of current". I'd love to see that statement put to the test.

author: EEVblog
author_rank: Unknown
timestamp: December 30, 2011, 09:28:29 am
content: No interest in visiting the low end handheld meter market again, it's flooded with countless options.It does have a 20uA range which is rather unusual.Dave.

author: Bored@Work
author_rank: Super Contributor
timestamp: December 30, 2011, 11:17:16 am
content: Quote from: drewtronics on December 30, 2011, 05:06:21 amWhile I would also suspect these meters are crap, I won't agree it is a ripoff. The price is within the range you typical pay for such meters. Sparkfun is asking for more or less the same as e.g. this chinese seller is asking for the Victor 70C on eBayhttp://www.ebay.com/itm/VICTOR-70C-3-5-6-Key-Touch-Digital-Multimeter-DMM-/390311615538What is annoying is Sparkfun's marketing. No, the 830L doesn't come with decent probes. They are just one notch up from total crap. And I'll guarantee you that at least half of all serious users of the 70C PC software will have problems with it.

author: Short Circuit
author_rank: Frequent Contributor
timestamp: December 30, 2011, 07:31:49 pm
content: Quote from: drewtronics on December 30, 2011, 05:06:21 amIt's virtually impossible to rip off with $15 multimeters. Actually, from that perspective, Flukes are are more like ripoffs. I mean; what's the point of selling meters that will probably outlive their ownersJust don't buy these if you expect it to be crap, or if you want a meter that lasts a lifetime. But the guys at SF are not stupid, so I expect these meters to function reasonably well for a reasonable time.And what is so extraordinary about a current sense resistor in a multimeter? Of course, accuracy won't be tremendously high, but I bet that's reasonably documented. Besides, target audience are the Arduino kids. I seriously doubt that anybody playing in that area will ever need more than 2 digit accuracy, hence fairly perfect tool for the job.

author: EEVblog
author_rank: Unknown
timestamp: December 30, 2011, 09:39:29 pm
content: If $15 is all you can or want to spend on a meter, then fine, it's better than nothing and adequate for most tasks and the intended market.No, Sparkfun aren't ripping anyone off, they are just selling cheap crappy meters like everyone else.Dave.
Nice lab, how to use the extra space.... - Page 1
Forum section: electronics / general

author: Jerndal
author_rank: Newbie
timestamp: December 30, 2011, 10:00:02 pm
content: Hi DaveI love your new lab, it will be interesting to see what you will do with all that space.In the mean time why dont you ask Scalextric to lend you a couple off slot car sets.Chek out the internet to see what people are building, lab trackers, race control, speed traps, power supply, lighting effects, controllers, pc interface, car tuning and much much more.And i havent mentioned the digital tracks, drive 6 cars on a 2 lane track...And the bedst part:its a lot of funDo it while you have the space.I can come up with a couples of ideas if you get interested.Chek outhttp://www.slotcarillustrated.com/index.php?categoryid=40Happy newyearJes
CuBox - Page 1
Forum section: electronics / general

author: sgix
author_rank: Newbie
timestamp: December 19, 2011, 07:49:44 pm
content: A teardown and review of the CuBoxhttp://www.solid-run.com/productswould be cool

author: hacklordsniper
author_rank: Frequent Contributor
timestamp: December 20, 2011, 12:28:44 pm
content: Some insides can be seen here

author: saturation
author_rank: Super Contributor
timestamp: December 20, 2011, 01:34:56 pm
content: Nice!I currently do this on my laptops and desktops. What I find limiting is streaming throughput using any box as a source is limited by the quality of the wireless N connectivity; the CPU load; and the source material codec. There are a lot of codecs, so unless medias are updated to the support the boxes codec library, one has find ways to locate legacy codecs to run older media. I think h.264 has won the compression wars and going forward we'll see most stuff using only it; but it wasn't too long ago that bluray players had to update firmware every quarter or so to keep up with media codecs; its even more volatile for streaming media and pell mell attempts at copy protection.
Mains power supply - Page 1
Forum section: electronics / general

author: steff
author_rank: Contributor
timestamp: December 13, 2011, 11:56:18 am
content: Looking at the current lab PSU project, one aspect that I notice is that it's currently being powered from an existing lab supply. For the avoidance of smoke, yelps and heart failure, it'd be excellent to talk a bit about a safe, buildable 110V or (better, for me) 250V PSU giving the 15V or so that the project requires (allowing margin for voltage drops across the two parts of the regulator.I've had a look at packaged supplies from the usual suspects (Farnell etc) and they seem quite pricey (possibly because they're doing a lot of their own regulation).

author: Psi
author_rank: Super Contributor
timestamp: December 13, 2011, 12:22:22 pm
content: The safest is to use a plugpack or powerbrick 230VAC - 15VDC and use thatYou can get cheap plug packs from china but there safety is questionable.Another way is to get a 230V - 15V@1A transformer and wire it up yourself with bridge rectifier and capacitor.If you wire the mains onto the transformer and cover all exposed mains terminals in heat shrink it's relatively safe to work with.You still need to respect it and keep your fingers away from that area just in case, but as long as you have all mains terminals covered it's not to bad to work on while its running.You should always have a mains cable clamp or strain relief so any pulling on the mains cable can't pull on mains wires internally.Also if you're using a metal box then the metal needs to be mains earthed with a longer wire than phase and neutral connections have.That is so, if the strain relief does fail, the earth wire is the last to take the force.

author: Zero999
author_rank: Super Contributor
timestamp: December 13, 2011, 03:43:21 pm
content: Quote from: steff on December 13, 2011, 11:56:18 amWithout a proper specification (i.e. current rating, ripple, regulation etc.) we can't help you. There's no point in anyone suggesting anything because it will probably not work as we are unaware of your requirements which you've failled to communicate to us.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: December 13, 2011, 05:02:36 pm
content: Quote from: steff on December 13, 2011, 11:56:18 amTrue.. this is what you are paying, plus max power rating in Amperes.

author: steff
author_rank: Contributor
timestamp: December 13, 2011, 06:12:13 pm
content: Quote from: Hero999 on December 13, 2011, 03:43:21 pmWell, I did relate it to the current blog series, which pretty much gives the specs itself. It's (currently) a 10V, 1A output, so allowing for generous losses we're looking at something like 15V 1A with some ripple acceptable due to the filtering in the Davesupplytm, no?As it happens, I found a cheapie switchmode generic laptop supply today which looks as if it'll do nicely provided it doesn't do anything too weird at low loads (though it'd still be smashing to have access to the design process if one were to homebrew one).
oscilloscope watch - Page 1
Forum section: electronics / general

author: george graves
author_rank: Super Contributor
timestamp: December 10, 2011, 01:46:58 am
content: I saw this, and it made me think of you Dave. It looks like a basic design that could be turned into a watch!http://www.saelig.com/product/PSHA026.htmAnyone know what screen that is?....

author: sonicj
author_rank: Frequent Contributor
timestamp: December 10, 2011, 05:08:02 am
content: looks like a 128x64 OLED.link-sj
Fuction Generators - What/Why & how much - Page 1
Forum section: electronics / general

author: ikrel
author_rank: Contributor
timestamp: November 07, 2011, 07:06:53 am
content: I'm not sure this is even the place to post/request this, but I was wondering if Dave could do a video about function/waveform generators.I would like to see his opinion on why someone would need one, how to use it and maybe a recommendation or two on what to look for when attempting to buy one.

author: McMonster
author_rank: Frequent Contributor
timestamp: November 07, 2011, 08:18:06 am
content: I second that, this is probably the only popular piece of gear that did not have much cover in the videos.

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 07, 2011, 09:20:15 am
content: in Shahriar's Vidz of TheSignalPath, he showed how we can use...1) Bench Power Supply.2) Function Generator.3) Oscilloscope4) Spectrum Analyzerin building a working circuit.http://thesignalpath.com/blogs/2011/10/17/tutorial-on-linear-and-non-linear-circuits/#comments

author: saturation
author_rank: Super Contributor
timestamp: November 10, 2011, 10:54:38 am
content: Couldn't agree more with mecha, to do analog design, you need a test signal source and that's what an FG is. FG is synonymous with signal generator, but the latter term is more associated with high frequency sines for RF work in the AM and FM bands, while FG was more versatile ... it generated more 'functions'. Audio generators are similar except they tended to create very high purity sine waves for audio testing, and threw in sometimes square or triangle waves as side benefits.http://en.wikipedia.org/wiki/Signal_generator1-3 are the absolute minimum you need to do analog design work with #4 being a DMM. Luckily a crude spectrum analyzer exists as a software based FFT analyzer in most #3 if you get a DSO instead of analog.Quote from: Mechatrommer on November 07, 2011, 09:20:15 am

author: Electronic
author_rank: Contributor
timestamp: December 08, 2011, 09:20:56 am
content: I vote for this one.More tests of function generators.Dave had one, and closed it with DDS are better but then no tests on a DDS.I also would like to see tests on the powersupplies he has inte the amazon-shop and I can't see any function generators there.
Rigol dropping the price on a great DSO! - Page 1
Forum section: electronics / general

author: Saustin
author_rank: Newbie
timestamp: November 30, 2011, 01:27:44 am
content: I heard from Saelig that Rigol is dropping the price of the 100 MHz DS1102E to that of the 50 MHz DS1052E. I believe the drop is supposed to occur around Dec 1st. Saelig has already dropped the price. I had been waiting to buy-- no longer! I received mine from Saelig today!BTW, I'm not a Rigol or Saelig employee.

author: 8086
author_rank: Super Contributor
timestamp: November 30, 2011, 02:25:19 am
content: Bit late

author: barry_g
author_rank: Newbie
timestamp: December 03, 2011, 11:52:28 am
content: If Rigol dropped the price, why is Saelig the only Web site offering $399? Or are there others I'm missing?
Shonky (sp) Product Debunk - Page 1
Forum section: electronics / general

author: roger
author_rank: Newbie
timestamp: December 17, 2011, 10:04:03 am
content: Hi Dave,An audiophile friend sent me this link:http://www.dynaudio.com/eng/pdf/DYN_Ocos_TechnGrundl_INT.pdfA wonderful example, containing lots of theory and math, which looks to be correct but totally misleading in this application.The term blinded by science comes to mind...Good luck with the new lab by the way....Roger

author: vk6zgo
author_rank: Super Contributor
timestamp: December 18, 2011, 05:21:40 am
content: Analog TV video signals have components from 25Hz to 5Mz,& they use plain old 75 Ohm coax.Of course,not as many people have "golden eyes" as have "golden ears"!VK6ZGO

author: roger
author_rank: Newbie
timestamp: December 18, 2011, 10:36:19 am
content: I guess we have a slight advantage in the RF department... hiRoger (DL4MGJ)
A visit to Rowerel in Adelaide, South Australia? - Page 1
Forum section: electronics / general

author: JonnyBoats
author_rank: Regular Contributor
timestamp: December 03, 2011, 03:45:59 am
content: David Rowe of Rowerel seems to be doing some very interesting open source design for telephone systems in the third world. (www.rowetel.com)as a bonus, not as far to drive as Perth ;-)

author: EEVblog
author_rank: Unknown
timestamp: December 03, 2011, 06:46:53 am
content: So noted!Dave.
How about a visit to the Perth Artifactory (hackerspace)? - Page 1
Forum section: electronics / general

author: JonnyBoats
author_rank: Regular Contributor
timestamp: December 02, 2011, 03:44:52 am
content: Dave, I like the road trips you take to visit various places.Might be a long drive but the Artifactory in Perth looks interesting.

author: mobbarley
author_rank: Regular Contributor
timestamp: December 02, 2011, 05:11:14 am
content: I would love to join a HS if there was one closer to home - I'll actually be in perth next week too.

author: EEVblog
author_rank: Unknown
timestamp: December 02, 2011, 06:01:50 am
content: Quote from: JonnyBoats on December 02, 2011, 03:44:52 amhttp://maps.google.com.au/maps?saddr=Perth,+Western+Australia&daddr=Baulkham+Hills,+New+South+Wales&hl=en&sll=-33.08627,133.41168&sspn=19.164552,43.286133&geocode=FSpwGP4du9fnBimtu9mea5QyKjHgVd81tfAEBA%3BFWDa_P0devj_CCnJ4M6Vl6ISazFQrTIWaH0BBQ&vpsrc=0&mra=ls&t=m&z=5Only 4000km or so, could do it in just under 2 days non-stop!Dave.
Interfacing Microcontrollers with the real world - Page 1
Forum section: electronics / general

author: lindworm
author_rank: Contributor
timestamp: November 15, 2011, 12:45:56 am
content: Hi all,I'd love to see more tutorials, especially on how to actually do a good job in designing standard I/O circuitry for microcontrollers and also how those parts work.For example:- ADCs: which kinds exist (...delta sigma adcs anyone?), how they work, and how what you should do to make a proper design (for example I had 2 ADCs in parallel for educational purposes and had to use impedance converters as their input resistance drops while sampling) probably enough for 2 or more blogs alone- the same with DACs- how to protect your circuit from the rest of the world and vice versa aka how and why do you galvanically isolate interfaces- how to use (for example) UART- perhaps a short one on PWM- maybe something about interfacing relays (this is pretty informative:http://jumperone.com/2011/10/using-relays/)So what do you think? I'd be amazed if some of this stuff would find it's way into the blog!Kind regardsLindworm

author: lindworm
author_rank: Contributor
timestamp: November 16, 2011, 05:46:11 pm
content: mhh, isn't anybody else interested in those topics?

author: Rudolfo
author_rank: Contributor
timestamp: November 21, 2011, 04:48:09 pm
content: Hi thereyou may take a look at this article:http://www.bipom.com/applications/micro_interfacing.pdf, as well as this universal interfacehttp://www.ichaus.biz/product/iC-JX.I hope this is useful.Rudolfo

author: lindworm
author_rank: Contributor
timestamp: November 21, 2011, 04:58:12 pm
content: Hi Rudolfo,thanks for your reply, the PDF is a good overview and certainly helpful for beginners.I consider myself quiet well informed about those topics, but everybody can certainly still learn a lot detail they didn't think of in the first place, especially how some of those components work in detail.That's why I suggested those topics as everyone who wants to get into micros has to cope with those things and more experienced users can probably also learn additional detail or tricks.Best regardsLindworm
Simple demonstration of simple magnetic generator with leds and capacitor - Page 1
Forum section: electronics / general

author: sooze69
author_rank: Newbie
timestamp: November 20, 2011, 02:25:20 pm
content: Okay - most of what is on this blog is gobble-de-gook to me as I have no knowledge of electronics - other than I grew up hearing the words resistors, transistors, capacitors etc as my dad was a TV engineer back in the days when TV's had big glass valves.Anyway - I am starting from scratch and trying to make myself a magnetic generator to light up 2 LED's. I have found some guidance on making a simple one - but I'd like to introduce some other electronic components to expand the concept further. I'd like to find a way of storing any additional electricity produced to keep the leds flashing (or lit up) for other 20 seconds. Or alternatively - to stop the LED's from flashing until the magnetics stop moving - kind of like deferring the generated power. I am hoping someone may have some ideas so I can build my improved generator. It was going to work by shaking the magnet - and the coil has 1000 turns and the magnet is really really strong!Something simple like this would be a great starters project for youngsters to do with an adult without being overly complex.Suzie

author: amspire
author_rank: Super Contributor
timestamp: November 20, 2011, 02:42:11 pm
content: You could charge a capacitor from the generator.If the generator had a maximum of 12V output, then if you charged a 5,000uF 15vW electrolytic capacitor, it could power a led flashing circuit for 20 seconds at a current of 10mA per LED and flashing for 0.1 second every second.

author: IanB
author_rank: Super Contributor
timestamp: November 20, 2011, 03:41:16 pm
content: Shaking a magnet backwards and forwards through a coil will produce alternating current that changes direction when the magnet changes direction. So I'm guessing the simple circuit contains two LEDs wired in parallel back to back so that each LED lights alternately.Storing the generated electricity in a capacitor is therefore going to require separate rectification to DC. (Thinks: I wonder if there's a circuit topology that can use the LEDs for rectification and can then light the same LEDs from the stored energy?)On the subject of engaging youngsters, have you seen these?
Testing an ADC and/or DAC - Page 1
Forum section: electronics / general

author: JonnyBoats
author_rank: Regular Contributor
timestamp: November 20, 2011, 05:22:19 am
content: Analog Devices publishes a nice whitepaper (http://www.analog.com/static/imported-files/tutorials/MT-010.pdf) discussing the various types of errors and specifications for ADCs and DACs.How would one go about verifying that a particular part one is considering using meets the requirements of the intended application?For example suppose it is critical that the output of an ADC be monotonic for the circuit to work properly, how would one setup a test jig to verify that a particular part did in fact produce monotonic output?The real idea here is not ADCs and DACs in particular but rather understanding how one goes about setting up test jigs for parameters that are not easily measured by standard bench instruments.A simpler example might be graphing the temperature coefficient of a ceramic capacitor (http://www.niccomp.com/Products/TC_Ceramics.pdf) .

author: amspire
author_rank: Super Contributor
timestamp: November 20, 2011, 05:49:10 am
content: Quote from: JonnyBoats on November 20, 2011, 05:22:19 amFor an ADC, you apply positive sloping ramp on the input, and test to make sure all readings are equal or greater then the preceding reading.For a DAC, you step through each incrementing voltage starting at 0 - say one step per millisecond. Put a differentiator on the output such as a 1nF capacitor from the output to the - input of an opamp with a 2.2 M feedback resistor. If the DAC is not monotonic at any point, there will be a positive spike on the opamp output.
Going deeper into (semi)automated test rigs - Page 1
Forum section: electronics / general

author: McMonster
author_rank: Frequent Contributor
timestamp: November 18, 2011, 01:28:52 pm
content: My new suggestion for future video is going further into building or using test rigs like this "probe" for testing resistors in #215.I've imagined a situation where someone builds some analog device and wants it tested for example over some large range of frequencies, with a lot different settings or in some other conditions that would require hours of manual work. A lot of lab equipment has some ways of automating them, like those GPIB ports in almost every older bench device, I've did some research on them and they have a lot of functionality. But this is just an example, I don't know if those are worth using today.
Blog about Noise and how to kill it? - Page 1
Forum section: electronics / general

author: x18
author_rank: Contributor
timestamp: December 03, 2011, 08:27:41 am
content: hi dave.because you got a tektronix 2225. i think a blog about noise and accuracy would be great. you could show techniques how to kill noise on the supply lines and all the other dc signals in a circuit where you need stable and accurate signals. this would be a great theme for showing those techniques in practice and not only dry theory.also i would be interested in the tektronix 2225 scope and if it is able to analyse the noise and if its worth buying one in reference to analysing and killing noise in a circuit.
Forum Suggestion - Page 1
Forum section: electronics / general

author: Mint.
author_rank: Frequent Contributor
timestamp: November 16, 2011, 05:24:10 am
content: Hey fellas,I reckon our forum should have an area for "electronics theory". Mainly directed at beginners such as me, it would not only help other people out on the forum, but also help to bring more traffic from the internet onto the blog.What do you think?

author: EEVblog
author_rank: Unknown
timestamp: November 16, 2011, 05:28:32 am
content: With these forums it's always a balance between number of categories, dilution of content, and how people use it and read new posts.e.g. some use the "Show unread posts since last visit" to capture every posts, and other just manually surf categories of interest.Always open to suggestions on categories....Dave.

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 16, 2011, 06:26:55 am
content: Quote from: MintyCondition on November 16, 2011, 05:24:10 amsometime its the other way around. anyway, there's beginner section you can ask question.but then, it will depend on how you ask question and how much interesting it is.
Chip Shooters - Page 1
Forum section: electronics / general

author: Lance
author_rank: Frequent Contributor
timestamp: October 20, 2011, 03:55:40 pm
content: I'd like to see a video about how chip shooters work in more detail. I've seen lots of videos, but they don't really allow you to see a lot of the operational details, since everything is moving so fast.

author: sonicj
author_rank: Frequent Contributor
timestamp: October 20, 2011, 07:17:21 pm
content: sounds like a drink special at one of those industry nerd conventions.

author: Lance
author_rank: Frequent Contributor
timestamp: October 21, 2011, 03:48:47 am
content: That's actually not a bad idea.

author: george graves
author_rank: Super Contributor
timestamp: October 21, 2011, 07:58:55 am
content: I imagined a "salad shooter"....for chips.

author: Lance
author_rank: Frequent Contributor
timestamp: October 22, 2011, 01:28:54 am
content: Quote from: george graves on October 21, 2011, 07:58:55 amI'm not familiar with that drink.Have you seen a chip shooter before? They're pretty neat.
Logic Analyzer - Page 1
Forum section: electronics / general

author: pcbraSil
author_rank: Newbie
timestamp: October 19, 2011, 11:05:47 pm
content: How about an episode on logic analyzers?How about compare Saelig and Zeroplus?Cheers!

author: Unknown
author_rank: Unknown
timestamp: October 20, 2011, 04:02:07 am
content: Dave did talk about logic analyzers in one of his early blogs. Not sure if it included those specific models. My suggestion is to try the software before you buy, since this is a critical part of a PC-based logic analyzer.

author: McMonster
author_rank: Frequent Contributor
timestamp: October 21, 2011, 10:15:48 pm
content: Yes, he did make a general tutorial about them in #44.Having scrolled through all blog post from latest to this one I must say searching for something in the blog is a real pain in the ass. For some reason searching for "logic analyzer" did not found any posts (there's "logic analyzer" in the post's title!), so I think it needs fixing (and the search field should be moved up so you don't have to scroll half of the page to see it) and maybe Dave should consider adding more keyword tags in the future posts? Just my $0.02.

author: george graves
author_rank: Super Contributor
timestamp: October 21, 2011, 11:08:48 pm
content: Addhttp://www.saleae.com/logic/to your list of units to check out.He also has a really great blog (bottom of the page is a link) - worth reading. He shares alot about the design process there. I think most EEVBlog viewers would enjoy it.

author: Unknown
author_rank: Unknown
timestamp: October 21, 2011, 11:56:24 pm
content: Searching for site:eevblog -forum logic analyzer on Google returns the correct episode. Guess the built-in search is useless, just like the forum search. Using Google often works much better.
More Builds and designs - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: October 15, 2011, 02:53:10 pm
content: I love videos when projects are seen from the very beginning and completed. I am an EE student and I want to see more builds. I really enjoyed the designing, building snd testing of the battery indicator. That's exactly how in depth I like those videos to be like. So many other build videos just show someone making something and you dont really see any analysis.anyone agree
EEVblog #99 – $100 Multimeter Shootout  links are broken - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 14, 2011, 07:38:20 pm
content: Hi Dave , at the DMM Shootout videos , the internal download links are all broken.Are you aware about this ?The 50$ two parts and the 100$ Shootout too.
New Server Poll - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: September 18, 2011, 05:43:59 am
content: As the title says.

author: hans
author_rank: Super Contributor
timestamp: September 18, 2011, 09:38:27 am
content: The new server seems very fast , even out here in Holland. So a yay from my side.

author: baljemmett
author_rank: Unknown
timestamp: September 18, 2011, 05:33:56 pm
content: It probably helps that the server upgrade happened on the same day that my 1.5Mbps ADSL was upgraded to 20Mbps VDSL

author: FreeThinker
author_rank: Frequent Contributor
timestamp: September 18, 2011, 05:38:55 pm
content: Seems quite snappy here in the UK

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 18, 2011, 07:46:09 pm
content: The ping response its not magic compared with the old.But it has the damn bandwidth so to respond promptly.

author: IanB
author_rank: Super Contributor
timestamp: September 19, 2011, 01:18:28 am
content: Quote from: Kiriakos-GR on September 18, 2011, 07:46:09 pmPing times are basically irrelevant when measuring server performance. All a ping does is tell you how long a message takes to reach the destination and get back again. It doesn't tell you a thing about how fast the server processes a request. Ping doesn't even tell you how much data the network can carry.

author: ivan747
author_rank: Super Contributor
timestamp: October 09, 2011, 02:40:42 am
content: Quote from: IanB on September 19, 2011, 01:18:28 amJust play a multiplayer shooting game online for 2 days and you will be upgrading to the lowest ping ISP in the country."He killed me before I could even turn back. That's unfair!"Now seriously I am having a problem with a BlackBerry phone which doesn't seem to connect to any server 50% of the time (when pinging a server, at least). And when it manages to connect, it takes more than a second to get a response to the ping from the phone. That means I have to wait 30 seconds for a bloody page to load. Even 3G is faster! This doesn't happen on the rest of my devices. This phone sucks!
Older/newer entries - Page 1
Forum section: electronics / general

author: pastus
author_rank: Newbie
timestamp: September 20, 2011, 09:59:21 pm
content: Hi everybodyThis is my first post here...Just a very little suggestion...anybody have minded about the postion of oledr/newer entry in the blog? It isn't more natural to swap their position (older on right and newer on the left)? Maybe they are like that because the blog is australian...

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 20, 2011, 10:21:46 pm
content: Quote from: pastus on September 20, 2011, 09:59:21 pmThis blog belongs to NATO allies , but we accept Chinese and Russians too. LOLIts best to add your flag in your profile, and other info if you like.Welcome.

author: Simon
author_rank: Unknown
timestamp: September 21, 2011, 05:35:32 am
content: I thought the blog entries were in a list with the newest at the top, I must have a speacial UK version(that is nato compliant of course)

author: EEVblog
author_rank: Unknown
timestamp: September 21, 2011, 06:46:57 am
content: Quote from: Simon on September 21, 2011, 05:35:32 amCould have sworn that's what I saw too...Dave.

author: pastus
author_rank: Newbie
timestamp: September 23, 2011, 08:57:45 pm
content: Quote"Bug" fixed... :-P