hybridfree/eevblog-posts huggingface dataset:
EEVBlog Itunes Podcast Download Error - Page 1
Forum section: electronics / general

author: EmbeddedEric
author_rank: Contributor
timestamp: September 16, 2011, 02:46:54 pm
content: Hey Dave,Just in the past week I've noticed that I can't download EEVBblog Podcasts #137 or earlier in Itunes. #138 on up to #200 download and play fine. I updated my Itunes to the latest and greatest and still have the issue. I am wondering if when you updated the server the link to the older blogs was lost.... or more likely it is user error by me. CAn anyone else download older #137 or earlier blogs from ITunes?Attached is the error I get. (I use DIVshare for hosting files)http://www.divshare.com/download/15732672-079Thanks,EmbeddedEric

author: EmbeddedEric
author_rank: Contributor
timestamp: September 16, 2011, 02:51:18 pm
content: Sorry that link doesn't want to show up either. The error that pops up in Itunes is:"There was a problem downloading "EEVblog #104 - Live Show #3". the URL "http://feedproxy.google.com/!r/ElectronicsEngineeingVideoBlog/~could not be found on the server."
#200 - Retrospective - Page 1
Forum section: electronics / general

author: Chet T16
author_rank: Frequent Contributor
timestamp: September 11, 2011, 10:56:45 am
content: Dave,Any chance you could add the episode numbers to the clips on the end? Seems like i've missed so many!

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 11, 2011, 08:58:51 pm
content: Dave - just out of idle curiosity, and I totally understand if you don't want to answer or can't for contractual reasons, but what sort of money does the blog bring in, and how does this divide up between the various sources - youtube, forum sponsorship etc. ?

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 12, 2011, 01:21:21 am
content: Youtube link ...DaveI am happy for you, the progress of EEV it is the result of your own work and mostly character.I never was fun of the Youtube service, but I do participate in forums as contributor for the past 15 years.By finding the EEV forum, I discovered an interesting new area of subjects for conversations, and I almost stopped to participate in the other forums.The time that I can afford to spend in forums is not endless.For me that I am an professional technician, the EEV forum mostly and your videos,become a new opportunity for me, like getting back to school ( even at my 42) so to find out, about all the latest and greatest about the DMM and metrology.The videos was the school class and the smiling professor managed to make the lesson more pleasant and in a way easy to be understood even by people who are for different countries = different languages = different cultures.The help that I got from you, when I was in need, it was another pleasant surprise that made to want to help you back.I did invite many Greeks to join in the EEV, and I am still doing it, I think that I am helping your dream, by my own way.Personally I am participating on this forum for 17 months up to date.Even by participating as a simple member, I had the chance to live lots of adventures speaking about the Fluke products, not to say that I was never see it coming ,and I am speaking about the Agilent product review invitation, that I got.This Agilent event, reminded me that if you are a hard working man with principals and a large smile, you do earn the appreciation from the others.After this summer I have the feeling that personally I do not need any more lessons from the EEV School, even so I will be around to help any one,who really wishes to be helped, in the forum.Give a big kiss to the project Sagan.
EEV Blog:143; "Agilent 2000X Series Infinivision Oscilloscope Review" - Page 1
Forum section: electronics / general

author: Lawsen
author_rank: Frequent Contributor
timestamp: September 11, 2011, 08:01:08 pm
content: I have the Agilent DSOX 2002a, a 2 channels, 70 MHz, and basic for $1,200.00 USD. I like it very much and I use it along with the Rigol 1052e. It has a convenient signal generator source. It is two instruments in one. I have to fix many HP giant plotters to earn enough for it. I like the tool tray bin in the back. I wished it was bigger and a knob latch, because the tab latch will break with open and close every week. I store the probes and DMM and analog multimeters separately. It is a very good oscilloscope.
EEV Blog: 194; "Lab Bench Build" - Page 1
Forum section: electronics / general

author: Lawsen
author_rank: Frequent Contributor
timestamp: September 11, 2011, 07:55:12 pm
content: Supporting the end of the new table top addition is difficult, because there needs to be room for the car. This left hand side corner will be a cantilever support. It can use a low angle, long right angle brace underneath the table top at the table legs. The car's hood must fit in with the brace without touching or scratching the car's front hood, bonnet. I have thought about a steel cable suspension for the table top, but not as attractive appearance, a suspension table top like a suspension bridge.I am trying to figure out how to add an extra table top in my small bedroom for my instruments and things.
Coolest Rigol DS1052E Firmware Ever! - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: October 27, 2011, 08:58:27 am
content: Coolest Rigol DS1052E Firmware Ever!Is it a custom thing or officially Rigol allow custom start up images?Alexander.

author: Chet T16
author_rank: Frequent Contributor
timestamp: October 27, 2011, 09:17:57 pm
content: We want answers dammit!

author: codeboy2k
author_rank: Super Contributor
timestamp: November 01, 2011, 07:20:31 am
content: I'm having deja vu thinking this is just another Dave trick like the 555 easter egg.This is way too easy to pull off in the video editor software.But cool boot screen if it's not a trick ! it is, in fact, a treat!Cheers!

author: EEVblog
author_rank: Unknown
timestamp: November 01, 2011, 08:49:27 am
content: Quote from: codeboy2k on November 01, 2011, 07:20:31 amI can assure you it's not a trick, it's real, and was done with a firmware update!My video editing skills ain't that great!Dave.

author: firewalker
author_rank: Super Contributor
timestamp: November 01, 2011, 09:40:54 am
content: A patched one? An official one?I guess there is something that prevents you from answering.Alexander.Quote from: EEVblog on November 01, 2011, 08:49:27 am

author: EEVblog
author_rank: Unknown
timestamp: November 01, 2011, 10:45:25 am
content: Quote from: firewalker on November 01, 2011, 09:40:54 amPatched, thanks to Drieg.Dave.

author: Storeinfinity
author_rank: Contributor
timestamp: November 02, 2011, 06:39:02 am
content: DaveThat'd your new business.EEV certified and recommendedYou might want to represent some hacked gadgets!

author: torch
author_rank: Frequent Contributor
timestamp: November 02, 2011, 03:12:20 pm
content: That is cool. But I'm not certain it still qualifies as "coolest". There's somecompetition over in the Rigol upgrade dummy guide thread.It may not look quite as fancy just yet, but boy does it have some future potential!

author: wd5gnr
author_rank: Regular Contributor
timestamp: November 09, 2011, 12:36:41 pm
content: I'd like to figure out how to sneak a USB stick over to my buddy's shop and flash his unit when he isn't looking. Have it power up and say something like:Gary. We know you hacked your scope. It will now self-destruct....That should give him a few seconds of panic.

author: saturation
author_rank: Super Contributor
timestamp: November 09, 2011, 07:19:34 pm
content: Nice. Its a fitting hack since part of eevblog's popularity was due to the 1052e hack, and its still one of the top topics in the stats.https://www.eevblog.com/forum/index.php?action=stats

author: rbarrios
author_rank: Newbie
timestamp: November 10, 2011, 08:04:45 pm
content: Oooh, what a nice hack. Aren't you going to share how it is done?Thanks,rbarrios
EEVblog #197 -- uCurrent failed units - Page 1
Forum section: electronics / general

author: ejeffrey
author_rank: Super Contributor
timestamp: August 18, 2011, 08:45:59 pm
content: Dave,I wonder if you did a post-mortem on the uCurrent units which failed testing? Was the problem out of spec parts, damage during assembly, or a conspiracy of worst-case component errors?

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 19, 2011, 12:27:40 am
content: Link ...

author: Zad
author_rank: Super Contributor
timestamp: August 19, 2011, 04:25:29 am
content: Fault finding would probably make quite a good Raw video! In this instance I suspect they are just slightly out of tolerance components that are conspiring against you.

author: Elandril
author_rank: Contributor
timestamp: August 21, 2011, 07:17:47 am
content: I'd second that!I'd love to see a fault finding episode for those uCurrents!
EEV Blog #168 - Page 1
Forum section: electronics / general

author: descandon
author_rank: Newbie
timestamp: August 29, 2011, 05:34:41 pm
content: Hey All,I finally have a few thousand dollars to setup my in-home lab. I watched Dave's blog, but what I'm looking for is a simple shopping list. Can someone recommend a shopping list that you would recommend to get my lab setup? I'll be working mostly on <100W converters, FPGAs, and MCU. I'll also be doing a lot of troubleshooting. Thanks for your help.-David

author: Computeruser
author_rank: Regular Contributor
timestamp: August 29, 2011, 07:30:01 pm
content: Other than specialized gear (which you would need to identify for yourself), I think Dave's blog (#168) covers it very well. I watched that one with interest. ....C
EEVBlog #200 - ????? ??? ??????? ???????! - Page 1
Forum section: electronics / general

author: metalphreak
author_rank: Frequent Contributor
timestamp: September 05, 2011, 02:15:09 pm
content: ?!What is Dave cooking up for #200...

author: Zad
author_rank: Super Contributor
timestamp: September 05, 2011, 05:16:13 pm
content: As number 100 was looking at the past, I think it could be a blog that looks at the future. Maybe take a look around at some of the local business premises Dave is considering (obviously with the consent of the owner/agent).

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 05, 2011, 11:19:19 pm
content: EEVBlog #200 LOLI think that I had ask first before some time this question, and Dave gave an reply, like that the numbering its not special to him.Probably I care about it more than Dave, but after this post , it looks that at list I am no alone any more.

author: EEVblog
author_rank: Unknown
timestamp: September 06, 2011, 01:05:18 am
content: Sorry, nothing special. I was going to edit some highlights, but I'm struggling to find the time.I'm flat out at the moment with all sorts of thing blog and non-blog related, it's insaneDave.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 06, 2011, 01:43:07 am
content: There is no any pressure, all that it was about, was an innocent curiosity.It was on the Greek TV news that Australia welcomes any Greeks who seek work and a new place to stay.Do you need any helpers ? LOL
eevblog #50 constant current power supply voltage - Page 1
Forum section: electronics / general

author: tome
author_rank: Newbie
timestamp: August 18, 2011, 06:24:39 pm
content: I noticed for this blog project Dave chose a Meanwell constant current power supply (LPC-35) that is rated for 9V-48V, yet the LEDs are only rated up to 3.75V. Did he add a voltage divider to it or something? I don't see that mentioned anywhere.Thanks,Tom

author: IanB
author_rank: Super Contributor
timestamp: August 18, 2011, 07:27:12 pm
content: I don't have time to go back and re-watch the whole blog right now, but LEDs are current rated devices. As long as you don't try to pass more current through them than they are rated for (given appropriate thermal design), then they will be fine. In Dave's case I'm pretty sure he had several LEDs in series, so this would have given an appropriate voltage match to the power supply.

author: tome
author_rank: Newbie
timestamp: August 18, 2011, 07:43:12 pm
content: Quote from: IanB on August 18, 2011, 07:27:12 pmAh, yes thanks. Looking closer at his photo I see that you are right, they are wired in series. At first glance I thought he had them in parallel.Thanks,Tom

author: IanB
author_rank: Super Contributor
timestamp: August 18, 2011, 09:05:29 pm
content: Quote from: tome on August 18, 2011, 07:43:12 pmAgain, I can't remember, but I think Dave may have covered this also. Just FYI, you should not attempt to wire LEDs in parallel. This is an outcome of the previously mentioned point that LEDs are current rated devices. Voltage loads go in parallel, current loads go in series. Connecting LEDs in parallel is something that will usually cause poor performance or premature failure of the LEDs.

author: ejeffrey
author_rank: Super Contributor
timestamp: August 18, 2011, 09:41:26 pm
content: You can connect LEDs in parallel with small load-sharing resistors. That will waste a small amount of power, but there is a big advantage that you can power a whole bunch of LEDs without getting into high voltage.How big your current sharing resistor must be depends on the type of LEDs, the operating conditions, and how unevenly you are willing to let the current split.
eevblog#191 - Page 1
Forum section: electronics / general

author: adam_lumpkins
author_rank: Contributor
timestamp: August 01, 2011, 04:43:05 pm
content: There are so many ways this could be done. I like daves way, but, I did some work with graphite It works great as an ignter..... there are many different sizes. I had some luck useing them as resistors.

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 02, 2011, 03:08:42 am
content: That could be useful for making a very cheap one shot relay. The thermal inertia would be particularly useful if you don't want an instant trigger. Or hot glue a piece of string to a chip or other part on your board and it would go off if something goes wrong and it overheats. At work, someone had problems with a part shorting out internally and burning the traces off an expensive board. The quick fix is a piece of string hot glued to the chip on one end and tied to a microswitch on the other. If the part gets hot enough to melt the glue, the switch springs back and cuts power. (They soon got a power supply with a programmable "protective relay" that can be set to trip only on certain voltage/current profiles as well as overtemperature. Ironically, the first one they got failed to trip and burned the board anyways...)Actually, prior to the common availability of cheap high power semiconductors, I remember about a science fair project someone did that used a mousetrap (as a cheap high current switch) and some disposable camera capacitors to launch a steel marble. (I forgot if it was a railgun or coilgun.)

author: ejeffrey
author_rank: Super Contributor
timestamp: August 02, 2011, 10:25:57 am
content: QuoteI am all for clever hacks, but.. how about a fuse? Or a polyswitch?

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 03, 2011, 01:01:55 am
content: The device in question often draws a lot of current (sending it to an external load) in normal operation. The problem happens when the device internally dissipates a lot of power. Therefore, the solution is a device that disconnects power before it gets hot enough to damage the board. The hot glue did that, as does the remote thermal cutout feature of the new power supply.
#186 SMD soldering - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: July 14, 2011, 11:25:43 pm
content: For further viewing on this subject, here's a video I did about speeding up the process of hand-placing SMD parts, plus a few other random SMD hints & tips

author: EEVblog
author_rank: Unknown
timestamp: July 14, 2011, 11:53:53 pm
content: Nice work as usual Mike!Dave.

author: Jimmy
author_rank: Regular Contributor
timestamp: July 15, 2011, 01:18:04 am
content: Very Nice Mike you have educated and inspired me to do more in house stuff. You showing the pick and place machine on camera and saying it takes longer to setup than make the small quantity of boards you need is invaluable information.

author: gregariz
author_rank: Frequent Contributor
timestamp: July 15, 2011, 01:26:33 am
content: For FYI those in the US... I get the stencils done atwww.pololu.comand the paste athttp://www.zeph.com/zephpaste.htm

author: Psi
author_rank: Super Contributor
timestamp: July 15, 2011, 02:52:28 am
content: That's some really great tips!Thanks

author: vtl
author_rank: Regular Contributor
timestamp: July 15, 2011, 04:41:17 am
content: Loved the video dave, i see youre pretty good at alighning those chips. I've always found soldering .5mm pitch ics to be easy, just the aligning the chip beforehand is difficult.One thing I noticed that wasn't discussed was the type of fluxes ie noclean, RMA and cleaning them up. I've use RMA flux in tubes and its typically is annoying to remove. Alcohol works but you sometimes have to use a lot of it so I like to heat up the flux reside with my hot air station. This liquifies the flux at a pretty low temperature and you can just wipe it off.

author: Rufus
author_rank: Super Contributor
timestamp: July 16, 2011, 02:51:59 pm
content: Good vid, thanks for sharing your experience.

author: IanB
author_rank: Super Contributor
timestamp: July 17, 2011, 06:13:45 am
content: Quote from: vtl on July 15, 2011, 04:41:17 amOrdinary alcohol does not dissolve flux very well, however isopropyl alcohol works much better. Isopropyl alcohol is often found as a cleaning solvent for cameras, electronics and other stuff. It is mild and generally doesn't harm plastics.

author: pmrlondon
author_rank: Contributor
timestamp: July 17, 2011, 08:37:22 am
content: I have never done SMD soldering but now think it's something I ought to try, once I can improve my kit. It looks about as I thought it would - I thought smaller pad sizes would make it more difficult.

author: saturation
author_rank: Super Contributor
timestamp: July 17, 2011, 10:35:10 am
content: Nice job Mike, thanks!

author: img
author_rank: Regular Contributor
timestamp: July 31, 2011, 01:49:26 pm
content: Excellent content and presentation.Thanks!

author: ablacon64
author_rank: Frequent Contributor
timestamp: August 01, 2011, 03:40:38 am
content: Thank you very much for the video, helped me a lot!

author: adam_lumpkins
author_rank: Contributor
timestamp: August 01, 2011, 05:05:52 pm
content: Nice job Mike! Thats one hell of a lab!!
#187 - Tektronix TDS 2024 C Teardown - Page 1
Forum section: electronics / general

author: Richard W.
author_rank: Regular Contributor
timestamp: July 21, 2011, 07:20:32 pm
content: Hello,nice teardown, I like it very much.I always wondered how it looks inside and now i don't need to open up my scope any morethanks DaveHave you actually measured the powerconsumtion of the scope?Do you know the rating of the fuse?I don't know why you don't like the design... I think its very clear and nice. Nothing fancy but decent.It is a scope, not a sportscar.with best regardsRichard

author: tesla500
author_rank: Regular Contributor
timestamp: July 21, 2011, 09:09:13 pm
content: Quote from: Squonk on July 21, 2011, 08:18:10 pmBecause the probe already contains that?Because they're OK with the tolerance of fixed and parasitic capacitances on the input in this cheap scope?

author: tesla500
author_rank: Regular Contributor
timestamp: July 21, 2011, 11:46:04 pm
content: Quote from: Squonk on July 21, 2011, 09:13:10 pmWhat's the purpose of the cap when they do have it? Do they need to trim the capacitance across the input to a very tight tolerance? Or does this cap do something else?

author: tesla500
author_rank: Regular Contributor
timestamp: July 22, 2011, 07:57:37 pm
content: Ahh, if you had said "attenuator compensation" I would have known exactly what you meant. Probe compensation is something totally different.I'm still not seeing what they're doing. Other guesses are:Very tight tolerance/custom value fixed capacitorsLaser trimmed capacitors (is that even possible?)Capacitors built into PCB layers, with vias drilled out to disable them"Capacitor DAC" with FETs switching in or out caps sized in powers of two (is that what those groups of 4 caps below the EE04AB chips are?Varicap didoe (seems like a bad idea)Digital compensation inside the ADC or ASIC for not quite perfectly compensated attenuatorAnalog compensation inside the amplifier ASICI'm presuming the EE04AB chips are amplifiers, and the EE05AF chips are ADCs. The big ASICs also have the national semiconductor logo, they probably did the entire ASIC set for this scope.Tek REALLY needs to retire this archetecture. Other than the sample depth, it's just so unresponsive to the controls. I really hate it whenever I have to use one of these scopes. I press a button or turn a knob, and a second later it responds. The Agilent scopes, even old ones from the 90s, respond virtually instantly, Using a 14MHz CPU no less (in the 54622 that I opened up)!

author: EEVblog
author_rank: Unknown
timestamp: July 23, 2011, 07:16:08 am
content: I saw this on the Tek home page, frigg'n hilarious!The TDS2000C series won an "AnnualCreativity" award from EEtimes! ROFL!Dave.

author: Bored@Work
author_rank: Super Contributor
timestamp: July 23, 2011, 08:11:50 am
content: Does someone know the going rate of what it takes to *cough* convince *cough* the likes of EEtimes to give you an award? Or to buy advertising disguised as an article?If it isn't too expensive we maybe could buy some award for the eevblog.
EEVblog #188 - iRiver Story HD Google Ebook Reader Review - Page 1
Forum section: electronics / general

author: shadowless
author_rank: Regular Contributor
timestamp: July 22, 2011, 12:35:48 am
content: Dave,Forget about iRiver. Go check out the nook book with touch screen. The screen is much better, no more ghost image.http://www.barnesandnoble.com/nook/features/index.asp

author: dengorius
author_rank: Regular Contributor
timestamp: July 22, 2011, 03:13:14 am
content: There is an update herehttp://www.iriver.com/support/download_list.aspbut it says only for google books in usa and there is no changelog. Curious to see what they fixed/changed
tenma oscilloscope 72-8225 - Page 1
Forum section: electronics / general

author: adidav
author_rank: Newbie
timestamp: July 10, 2011, 05:46:48 am
content: Hi Dave,I saw on Youtube your movies and are great. After that I thing you can be the one who can help me with my oscilloscope.One year ago I bought a Tenma oscilloscope (model 72-8225, 40MHz) from Farnell. Till now it work very fine but the firmware has some glitches. So I decide to do an upgrade to the firmware, but I couldn't find anything about this over the internet, not even the company Tenma.Thank you very much.Best Regards,ADi

author: gregariz
author_rank: Frequent Contributor
timestamp: July 10, 2011, 06:34:57 am
content: I think farnel are selling UNI-T's maybe?http://uni-trend.com/UTD2042C.html

author: Bored@Work
author_rank: Super Contributor
timestamp: July 10, 2011, 06:42:13 am
content: Tenma is not a real company. Tenma is a brand of Farnell. For whatever reasons Farnell sometimes feels the need to play a smoke and mirror game and slap their Tenam sticker on OEM equipment.Your 72-8225 is an older UNI-T, likely a UTD2042C, with a Tenam sticker, in a grey/white case instead of UNI-T's typical red/black and maybe some other cosmetic changes like changed screen messages, and a manual where they did a 'search and replace' of UNI-T with Tenma.Unfortunately, UNI-T is not known to be forthcoming with firmware updates. You could of course try. And you could also try Farnell.

author: FreeThinker
author_rank: Frequent Contributor
timestamp: July 10, 2011, 04:50:01 pm
content: Quote from: BoredAtWork on July 10, 2011, 06:42:13 amRS plays the same silly game with it's Isotech range. Most annoying!

author: adidav
author_rank: Newbie
timestamp: July 10, 2011, 06:19:08 pm
content: Thank you very much for replays. Now I understand why I don't find anything about Tenma.But if anyone can give more information about my oscilloscope. I saw the oscilloscope 40 , 60 and 100MHz had the same samples 500MS/s. I think is the hardware is the same but the firmware is different. Perhaps the firmware from one of this can be suitable for mine.
EECBlog #17 - Project doesn't work - Page 1
Forum section: electronics / general

author: justinc
author_rank: Newbie
timestamp: June 18, 2011, 02:32:26 pm
content: A few days ago I was going through your older EEVBlogs and came across #17 and how prophetic it was for the project I was working on.Now about 25 years ago (give or take a few years) I bought a Silicon Chip magazine with a project for a Brake Light Flasher. (For those interested April 1989 Auxiliary Brake Light Flasher.) At the time I did not have a car, but was interested in electronics, and though that this was a most excellent idea.A couple of years ago I had a near miss with some one just about going into the back of me which dredged up the memory of this project. I contacted Silicon Chip but they wanted $30 for a photocopy of the article. Too much for the Scrooge in me!I scoured the Internet looking for a similar kit or circuit or unit that would do the basic flash x times, the constant, and not flash again if brakes applied within 15 seconds. With the cost of freight to get things to New Zealand I was really after a circuit that I could then build a unit from. There were a few based around 555 timer ICsA few weeks ago I discovered the Arduino (which incidentally let me to discovering EEVBlog) which has set me off on another project, my thoughts turned again to a High Stop Flasher unit. I realised the Arduino would be an overkill but I had a look anyway. And blow me down if a Google search took me to the best solution I personally have seen yet athttp://180sx.locost7.info/led_brake.php.I toddled off to Jaycar and bought all the parts I needed, and some tools I was going to need. The old plug in soldering iron was not going to cut it any more!!!I assembled the circuit on a bread board and after working out the correct MOSFET and transistor alignment/connections had it working brilliantly. I then transferred it onto a small experimenters board.After a slow and methodical transferring of components and making the links I eventually soldered the last link into place thinking "yippee all finished". I applied the 12V supply and ............... nothing!!! Zip!!! Nada!!!Immediately the phrase "... I hope you switch it on and it does absolutely nothing..." rang in my head. Thanks Dave!!!!After 5 min of rechecking the solder joints and following the circuit diagram I realised I have transposed the connections to the PICAXE08M chip. And I know why this happened too. I changed the orientation of the chip from the breadboard to the circuit board and had not adjusted the links to compensate.Its all installed now and giving those following behind me in the car something unusual and attention grabbing to look at.So I'd have to agree with you whole heartily in your sentiments on debugging projects.CheersJustin
EEVblog #86 - Need Analog Oscilloscope - Page 1
Forum section: electronics / general

author: parbro
author_rank: Contributor
timestamp: June 17, 2011, 07:22:55 pm
content: I am just getting started into learning electronics and have hit the limits of my computer sound card o'scope. In the spirit of Dave's video, I could really use an analog oscilloscope donation or low cost option. I live in Florida. Any ideas? Thanks.

author: vk6zgo
author_rank: Super Contributor
timestamp: June 18, 2011, 09:51:37 am
content: Look at eBay,in the "for sales" in your local paper.If there are Radio Hams in the area,you may be able to find out if there is a "Ham Fest" coming up.I bought a very nice Tektronix 7613 for $135 at a local Hamfest.As you are in the USA,you could look in QRZ.com to see if any Hamfests are being held,or if anyone is selling an Oscilloscope in your area.VK6ZGO

author: vk6zgo
author_rank: Super Contributor
timestamp: June 18, 2011, 02:57:12 pm
content: OOPS!,I looked on QRZ.com,& one bloke in Oregon has a 100MHz HP Oscilloscope for sale,but it's a bit costly,around $350 if I remember correctly.That was posted about a week ago in their "Online Hamfest" section.They also have a section showing upcoming Hamfests,but it looks like there is nothing immediate in Florida (You just missed one)I just realised EEV Blog have their own "For Sale" section,it might be best to look there first.VK6ZGO

author: Lawsen
author_rank: Frequent Contributor
timestamp: July 04, 2011, 07:09:58 pm
content: I liked this oscilloscope, that I am familiar with in electronics school days at community college, before the U. The HP 1725A at 275 MHz analog oscilloscope with the cathode ray tube, heavy weight. It is solidly built and great for viewing electronics and home brew amplifiers.Surf here to get an idea on the costs and how it appears. Beware, there are some not working models on E Bay, too.http://cgi.ebay.com/HP-1725A-Oscilloscope-275-mHz-Delayed-Trigger-Nice-/190550519341?pt=BI_Oscilloscopes&hash=item2c5db22e2dThere are many Tektronix 22xx series and the 20 MHz 2205 are widely available, too. Philips made in Eindhoven, Netherlands is another good brand to buy second hand, but many are not functional, broken advertised on E Bay.Lawsen
EEVblog #72 - Let_s Design a Product ( uCurrent ) - Page 1
Forum section: electronics / general

author: Tioleco
author_rank: Contributor
timestamp: June 10, 2011, 12:52:13 am
content: Have some questions about the uCurrent:1 - Changing the supply voltage is necessary to change the value of some component?2 - Can I use discrete components instead of SMD (for capacitors and resistors)?3 - Using linear DC power supply with common transformer , there would be a noise problem that would hamper the performance of the circuit?4 - If this problem ( burden voltage ) is already well known , because the manufacturers no longer incorporate a circuit like this in their multimeters?

author: sacherjj
author_rank: Frequent Contributor
timestamp: June 10, 2011, 01:35:46 am
content: QuoteYes. At the minimum, the LED current limit resistor and all the low voltage detection.QuoteYes, but if you are doing SMD for the ICs (which is the only option) then resistors and caps aren't too hard in 0805 packages.QuoteAbsolutely. It will run for 10 hours with a battery, why do you need to use AC power? The noise on a circuit this sensitive will most certainly be a problem unless you filter very well.QuoteIt is impossible to have this circuit accurate and protected.
eevblog 174 not on itunes or rss feeds or home page - Page 1
Forum section: electronics / general

author: r
author_rank: Contributor
timestamp: June 04, 2011, 06:58:18 pm
content: eevblog 174 not on itunes or rss feeds or home page

author: EEVblog
author_rank: Unknown
timestamp: June 04, 2011, 11:25:48 pm
content: Err, oopsUploading now.Been kinda pre-occupied lately!Dave.

author: FreeThinker
author_rank: Frequent Contributor
timestamp: June 05, 2011, 12:46:03 pm
content: Quote from: EEVblog on June 04, 2011, 11:25:48 pmDon't beat yourself up about it, it will get worse before it gets better (teething, runny noses, upset tums etc,)
eevblog #46 - Page 1
Forum section: electronics / general

author: Thermionic
author_rank: Newbie
timestamp: August 01, 2010, 05:38:38 pm
content: Hi,I've just discovered the eevblog ... a year late I know, but it's great!Trying to catch up by watching several each day, and I just viewed #46.I was intrigued by the Gossen Metrawatt's reading of the 3v, and the initial reading of 3.27v, and was wondering if there was any significant overshoot of the powersupply on switch on that the Gossen was able to read, that other meters might miss, before the supply settled down? Just a thought.

author: openground
author_rank: Newbie
timestamp: January 03, 2011, 07:26:53 am
content: Interesting to note the xtra is only 11999 Dsplay count but the tout it as 60000 countresolution, which is a horse of a different colour- at least with the bmi dranetz version.

author: caspencer
author_rank: Newbie
timestamp: May 27, 2011, 05:23:44 am
content: Quote from: openground on January 03, 2011, 07:26:53 amYeah I thought that was weird too.The Dranetz DranTech PRO/XTRA product page (http://dranetz.com/drantech-xtra-pro) says4 1/2-place display (11,999 counts), the brochure PDF* (http://www.tequipment.net/pdf/Dranetz/XTRA_datasheet.pdf)* says4 ¾ -digit display (60,000 counts).* You have to register to download the brochure from the dranetz website (lame). Tequipment.NET has a copy on their site.Even TEquipment.NET thinks the PRO and XTRA are 60000-count meters (http://www.tequipment.net/DranetzMultimeterGuide.html).I checked the User Guide PDF and it in the technical section is lists the following:Number of digits 4 7/8 digits = 60,000 countsOverflow display “0L” is displayed for >= 12,000 digitsSo who knows...
"Back to the Future" is on the Panasonic Plasma TV Review @ EEVblog #52 - Page 1
Forum section: electronics / general

author: Lawsen
author_rank: Frequent Contributor
timestamp: March 27, 2011, 08:06:30 pm
content: Dave Jones:I understand your unhappiness with the TV. Electronics is still a science. It does not always works. You might as well replace it with a low end LG, Samsung, or a middle price Sony. Masking out the dead pixel columns like you did is brilliant. I have a low end, cheap LG. I cannot afford a Sony.If you like Back to the Future so much, then, why did not you buy an used De Lorean Motor car, DMC from California or Texas? Most used De Loreans are in California and Texas, U.S.A. Houston, Texas still has a De Lorean store for parts.http://www.deloreanmotorcar.com/dmc/4sale.htmhttp://www.delorean.com/Lawsen

author: EEVblog
author_rank: Unknown
timestamp: March 27, 2011, 09:11:43 pm
content: Err, I'm in Sydney Australia.Dave.

author: Psi
author_rank: Super Contributor
timestamp: March 28, 2011, 12:30:20 am
content: heh, speaking of back to the future, i was just sent this vid.I never noticed this before and i've seen back to the future 3 many many times.Warning, after watching this clip you won't be able to go back to not noticing it.

author: the_raptor
author_rank: Regular Contributor
timestamp: March 28, 2011, 03:15:55 am
content: Thank you Psi for ruining that movie for me for ever..... THIS IS WHY WE CAN'T HAVE NICE THINGS!

author: Psi
author_rank: Super Contributor
timestamp: March 28, 2011, 03:44:03 am
content: lol, warning added to post

author: neoone
author_rank: Regular Contributor
timestamp: April 02, 2011, 06:46:02 pm
content: heh I've been showed this video recently - shortly after we went for night marathon of Back to the Future on Jan 5th - that was a great thing to be able to watch the trilogy in movie theater despite it's from 1985/89/9026/22/21 years later it still kicks

author: Chet T16
author_rank: Frequent Contributor
timestamp: May 22, 2011, 09:40:08 am
content: I only seen blog #52 now. Towards the end of 2009 my panasonic died in the same way. It was a 42" viera pv/px60 which looks to be the same as yours. At the time it was almost three years old with only a one year warranty. I was quoted 750 euro in parts alone to fix it (replacement screen too) but i wrote panasonic a letter asking for it to be fixed and in the end it was repaired FOC, which was nice!Considering it was nearly 2 years out of warranty it must have been a common faultFunnily enough in the weeks while it was away i bought a 46" samsung LED but that needed a new screen within 3 months!
Problems Watching Blog on Safari - Page 1
Forum section: electronics / general

author: dchester
author_rank: Newbie
timestamp: April 29, 2011, 11:15:30 pm
content: Hi,Is anyone else with intel macs having problems watching the blog? In safari it freezes both on the eevblog website and youtube. Its not my internet connection(I live in the UK and have Virgin Media(50mb)) and its not at a peak time either as its just happened at its 00:12. So if anyone else is having these issues how are you getting around them?TIA,Dean

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: April 30, 2011, 07:27:28 pm
content: Works fine here.

author: amigo
author_rank: Regular Contributor
timestamp: April 30, 2011, 08:25:50 pm
content: No problems here either, Mac OS X 10.6.7, Safari 5.0.5.Maybe it's the Flash plugin hanging, update to the latest version, or kill the WebKitPluginHost which will force reload of the plugin(s).

author: dchester
author_rank: Newbie
timestamp: May 01, 2011, 12:20:23 pm
content: Killing the Flash plugin fixed the problem. Its strange as with any other youtube video I don't have this problem :S

author: amigo
author_rank: Regular Contributor
timestamp: May 01, 2011, 01:37:39 pm
content: Glad it worked. This happens from time to time on other sites and killing the plugin host task is an effective remedy.Alternatively, you could force HTML5 on YouTube videos (also works on Vimeo), there's a Safari extension here:http://www.verticalforest.com/2010/10/27/youtube5-version-2/

author: dchester
author_rank: Newbie
timestamp: May 01, 2011, 10:11:43 pm
content: HTML5 Youtube only works with videos without ads.

author: amigo
author_rank: Regular Contributor
timestamp: May 02, 2011, 01:57:10 am
content: Really? I guess I never bothered to try enough, I still keep using the Flash version.Maybe there's a way to block the ads?
Microscope in the EEVBlog #168 is an Olympus SZ, 1966 vintage, Greenough design. - Page 1
Forum section: electronics / general

author: Lawsen
author_rank: Frequent Contributor
timestamp: May 02, 2011, 04:46:07 am
content: Dave Jones:Your stereo zoom is a classic 1966 Olympus SZ greenough optics stereo zoom microscope made in Japan. It has great depth of field, working distance, 3D, and great eye relief. It is two microscopes in one to give lower N.A., good eye relief, and working distance to view solder trace quality and circuit boards. Surf here:http://www.olympus-global.com/en/corc/history/design/year/1966.cfmI started in electronics trade, but migrated to geology earth sci about a decade ago. My mircoscopes are going to be different and larger, Nikon SMZ-U common objective type. I do not have a Mantis or special ones by Mituyo.Lawsen

author: EEVblog
author_rank: Unknown
timestamp: May 19, 2011, 11:25:30 pm
content: Thanks for the info.I didn't know it was that old, certainly doesn't look it!Maybe it's the same design manufactured much later?The optical quality is indeed very high.Dave.
EEVBLOG #161 - Problem solved. - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: April 19, 2011, 11:57:07 pm
content: And remember kids, always wear the EEVBlog sanctioned Hong Kong safety boots as worn by Dave.

author: EEVblog
author_rank: Unknown
timestamp: April 20, 2011, 06:33:12 am
content: Made in Australia thank you very much!They come in steel cap version too:Dave.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: April 20, 2011, 06:39:18 am
content: HahahaYeah gotta protect them tootsies.

author: vk6zgo
author_rank: Super Contributor
timestamp: May 09, 2011, 01:52:13 am
content: I was wearing those type of "safety boots"(not the steelcap version),when an AVO Model 8 fell off the top of aradio transmitter.I automatically put my foot out to break its fall.That's something you only try once!!VK6ZGO

author: EEVblog
author_rank: Unknown
timestamp: May 09, 2011, 07:24:56 am
content: But did the AVO survive?Dave.

author: vk6zgo
author_rank: Super Contributor
timestamp: May 09, 2011, 08:06:27 am
content: Hell,yes!!VK6ZGO
Thread relocation  to projects.  - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: April 29, 2011, 06:38:09 pm
content: I just found this thread of my.https://www.eevblog.com/forum/index.php?topic=660.0And probably needs relocation toProduct Reviews, Photos, and DiscussionCurrently is lost , in the big barrel of the General Chat section .Thanks..
EEV #110 - Page 1
Forum section: electronics / general

author: KoDeOne
author_rank: Newbie
timestamp: April 24, 2011, 08:44:53 am
content: Hey I just saw the video on how to make a dc-dc converter. It was great by the way, but I was wondering if anyone could tell me how to design it so that it would function as a dual output boost converter. If anyone could help, I would greatly appreciate it.
The Art of Electronics Blog - Page 1
Forum section: electronics / general

author: Rutger
author_rank: Regular Contributor
timestamp: April 05, 2011, 02:55:44 am
content: Hi, I know Dave recommended this book and I found the pre-order on Borders for the revised version coming out at the end of June 2011.The price seems very good, and I am wondering if this is a shorter version. Here is the link:http://www.borders.com/online/store/TitleDetail?sku=0521809266&id=52288607Rutger

author: Ronnie
author_rank: Regular Contributor
timestamp: April 05, 2011, 06:10:06 am
content: The 2nd edition was released in 1989 so will this be the 3rd edition?

author: mkissin
author_rank: Regular Contributor
timestamp: April 05, 2011, 08:31:56 am
content: Yeah, the price seems low, the abstract is odd, and it should be the third edition, not the second.Also, the third edition of the Art has been "coming soon" for literally years. There's very little reason to think it'll be out this year. Still, I live in hope.

author: metalphreak
author_rank: Frequent Contributor
timestamp: April 05, 2011, 10:39:52 am
content: If you look up the ISBN number, it's listed at heaps of places at a similar price.Amazon lists it at $100 though:http://www.amazon.com/Art-Electronics-Paul-Horowitz/dp/0521809266http://isbn.nu/9780521809269/The 2nd edition had the actual hardcover book for ~$100. Then there was a cut down student manual version for about $50. Maybe some places have them confused (if they are doing a similar thing for the 3rd edition).

author: FreeThinker
author_rank: Frequent Contributor
timestamp: April 08, 2011, 10:04:35 am
content: Quote from: Rutger on April 05, 2011, 02:55:44 amThink it will be a reprint of version 2. Probably a restock. Good price and an excellent read.
Forum website address in two places one is wrong - Page 1
Forum section: electronics / general

author: kiyotewolf
author_rank: Contributor
timestamp: May 19, 2011, 11:29:58 am
content: http://www.eevforum.com/I tried to register here, cause half way down your page Dave, is this web address for the forum.On the top, is the correct web link, to the correct forum, I dunno why you have a working forum link, as well as a dead one.~Kiyote!Has thewww.eevforum.combeen hacked? I used a unique password for the first time around, but I'm still a bit wary.

author: EEVblog
author_rank: Unknown
timestamp: May 19, 2011, 12:31:50 pm
content: Are you saying registering or doing something else via eevforum.com is not working?eevforum.com is just a URL redirect, the actual forum is still hosted at eevblog.com/forum for backward SEO reasons.Dave.

author: copiertalk
author_rank: Contributor
timestamp: May 19, 2011, 11:20:19 pm
content: When you are logged into the forum, and then visit eevforum you are not logged in.it looks like a cookie or domain/subdomain issue. in IPB I would fix it with cooking domain or prefix. I am not sure about small machines though.That is what I am seeing. I am not sure about the person that started the thread.

author: EEVblog
author_rank: Unknown
timestamp: May 19, 2011, 11:23:31 pm
content: Ah, ok.Seems to work for ok for me. It keeps me logged in and tracking unread messages using either URL.Dave.

author: joelby
author_rank: Frequent Contributor
timestamp: May 20, 2011, 12:53:25 am
content: It appears that eevforum.com just uses frames to display eevblog.com/forum/ and thus shouldn't cause any session/cookie issues.However, using frames is probably worse for SEO than just redirecting users to the eevblog.com domain, though sites that just redirect to another site aren't much good for SEO either.

author: EEVblog
author_rank: Unknown
timestamp: May 20, 2011, 12:59:22 am
content: I really am in two minds over the domain.I like the eevforum.com domain and the idea of separating it and running it from there, but I don't want to lose all my existing search content.I'm not sure what happens if I transfered everything over.Dave.

author: copiertalk
author_rank: Contributor
timestamp: May 20, 2011, 02:01:01 am
content: when I went from vbulletin to IPB I set up an htaccess file to redirect my old links to the new format with a 303 redirect.I lost some traffic but I was not a horrible issue.I am not sure on the SMF way of doing things to be honest though. I have never used it or played with the options much.
EEVblog #142 – Electronics Magazine Memories - Page 1
Forum section: electronics / general

author: Lance
author_rank: Frequent Contributor
timestamp: February 04, 2011, 06:52:37 am
content: I just watched it. I remember my instructor had some old magazines in high school, I had loads of fun going through them all. Does anyone know of an archive that has these on hand? I'd love to get at these.

author: RayJones
author_rank: Frequent Contributor
timestamp: February 04, 2011, 08:43:16 am
content: Gotta love that "Protel Font" on the DSO adapter - now look where Dave works!

author: quantumfall
author_rank: Regular Contributor
timestamp: February 04, 2011, 09:52:13 pm
content: I have fond memories of these type of magazines, they had a great charm even though the subject matter was technical it was friendly and accessible at many levels.Well done to have kept them so well Dave, you can enjoy them again now

author: williefleete
author_rank: Regular Contributor
timestamp: February 05, 2011, 05:11:10 am
content: i would love your place methinks dave. i love those old magazines, electronics australia in particular and the serviceman's log.

author: Frenchie
author_rank: Regular Contributor
timestamp: February 09, 2011, 02:44:13 pm
content: I used to love the EA serviceman's log as a kid

author: ecowarrior
author_rank: Contributor
timestamp: February 12, 2011, 08:30:27 pm
content: My first introduction to Electronics was through Hobby Electronics magazines many years ago with my dad. Happy memories of making little LEDs go on and off on a breadboard.Never did take it up as a job (though I almost did), but I've returned to being interested in electronics now (30+years later) and I really do wish I hadn't thrown those magazines away!!!

author: saturation
author_rank: Super Contributor
timestamp: March 28, 2011, 05:07:17 pm
content: Thanks for the memories Dave; I'm surprised you keep those old magazines. Its hard to throw those away, I feel the same passion for it; they are like old friends, but it just takes up extra room more than I'd ever refer back to them.One thing nice about Ozzie electronics mags is, IIRC, they used as much US parts than British parts, so it was more applicable for those who were using US centric components.One main driving force for DIY gear was economy, as we were all cash strapped, making my own test gear was the only way to afford decent equipment, and learned a lot doing so. This was also at a time a lot of professional stuff was still mostly hand made, 1970-90.Today, if hobbyists model their projects around the same idea, it tends to not have the same motivation as Chinese electronics are far more low cost and where robots do assembly, can undercut any labor tremendously.However, there many niches were devices do not exist for consumers or hobbyists mainly because the devices are either so low volume, or potentially illegal to manufacture. Non-lethal weapons like dazzlers or tasers, IR RF and cellphone jammers, camera auto-focus jammers, etc., are fairly easy to figure out the basics [ you can also build devices that are patented, but can't commercialize your project for obvious reasons].
EEVblog #50 - Where did you buy the LEDs from - Page 1
Forum section: electronics / general

author: Tony R
author_rank: Regular Contributor
timestamp: April 18, 2011, 12:57:19 am
content: I just watched "EEVblog #50 - Solid State Cree LED Lighting, and How Thermal Design Sucks." and my question is where can i get some of those LEDs or where can i get a similar product?

author: EEVblog
author_rank: Unknown
timestamp: April 18, 2011, 01:44:02 am
content: http://www.cutter.com.au/categories.php?cat=Cree+LEDSDave.