hybridfree/eevblog-posts huggingface dataset:
getting rid of the hibernation file in windows - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: August 18, 2012, 09:57:32 am
content: I'm down to 2GB free on my C drive. But 6GB it tied up by the hibernation file I don't need. How do I remove it ? if I try to delete it it refuses to let me. I also have non allocated space in front of this partition on my hard drive but it won'r let me expand this partition into that space. This is windows 7 - aka vista with some issues fixed.....

author: Rerouter
author_rank: Super Contributor
timestamp: August 18, 2012, 10:19:47 am
content: http://www.sevenforums.com/tutorials/819-hibernate-enable-disable.htmlanother win for google

author: Simon
author_rank: Unknown
timestamp: August 18, 2012, 10:23:24 am
content: Quote from: Rerouter on August 18, 2012, 10:19:47 amThank you, yea should have googled it

author: M. András
author_rank: Super Contributor
timestamp: August 18, 2012, 03:39:07 pm
content: Quote from: Simon on August 18, 2012, 10:23:24 amyou can also delete the temp folders:) there are some but you need to see the system and hidden files for that if you installed the system years ago it maybe has tens of GB junk in it everything it contains you can freely delete the currently used stuffs will be denied to acces you just skip them

author: SeanB
author_rank: Super Contributor
timestamp: August 18, 2012, 03:49:20 pm
content: Also delete old system snapshots, often they are huge.

author: T4P
author_rank: Super Contributor
timestamp: August 18, 2012, 03:55:57 pm
content: Quote from: SeanB on August 18, 2012, 03:49:20 pmWhere do you find them?

author: SeanB
author_rank: Super Contributor
timestamp: August 18, 2012, 04:06:12 pm
content: Google?? They are well hidden in the system folder.Or buy a bigger disk and ghost the lot over to it.
We're NASA and we know it......:) - Page 1
Forum section: electronics / general

author: PeterG
author_rank: Frequent Contributor
timestamp: August 17, 2012, 01:25:25 am
content: Saw this and just had to post it here.Good for a laugh..Regards

author: cloudscapes
author_rank: Regular Contributor
timestamp: August 17, 2012, 02:58:14 am
content: This so bad, it's good!

author: firewalker
author_rank: Super Contributor
timestamp: August 17, 2012, 06:14:46 am
content: Lolololol. Nice!Alexander.

author: EEMarc
author_rank: Regular Contributor
timestamp: August 17, 2012, 07:42:41 am
content: I'm never getting that two and a half minutes of my life back.
polarized capacitors in ac?? - Page 1
Forum section: electronics / general

author: kgavionics
author_rank: Regular Contributor
timestamp: August 16, 2012, 10:05:14 pm
content: hii have a little confusion guys about polarized capacitors and hope can someone can make it clear for me.i hooked up 2 electrolytic capacitors like this (image bellow) in the breadbord and i made a test and it worked pretty fine but my question :is there a conduction current between the 2 negative leads since they have the same polarity?thank you in advance guys

author: mukymuk
author_rank: Contributor
timestamp: August 17, 2012, 04:31:41 am
content: Yes there is current flow, but that's beside the point. You don't want to apply a negative voltage to a polarized capacitor. It might work for awhile, but it could cause the capacitor to fail.

author: kgavionics
author_rank: Regular Contributor
timestamp: August 17, 2012, 04:39:00 am
content: thank you shawn for reply but when the ac source changes polarity either c1 or c2 is being right polarized (always either one of the two capacitors in charged from + side) am i right?

author: mukymuk
author_rank: Contributor
timestamp: August 17, 2012, 05:16:22 am
content: I'm not 100% clear on your question. Maybe some loss in translation here.QuoteYes, either one are the other has a positive voltage from anode to cathode, but not both. One will always have a negative voltage, except when V1 = 0.This might help: You could correct the circuit by adding 10V DC to V1 and reversing C2.Prove this by adding a second scope probe to the cathode of C2 and turning on the A-B function. You'll see a sine wave that goes below zero for half the cycle.

author: ejeffrey
author_rank: Super Contributor
timestamp: August 17, 2012, 07:35:07 am
content: Yes, this is a standard way to use electrolytic capacitors with AC. You can also buy 'bipolar electrolytics' which work similarly. It is true that one of them is reverse biased, but the forward biased cap stops the current flow that would cause them to pop.
Interesting R/R2 Dac Tool - Page 1
Forum section: electronics / general

author: Rerouter
author_rank: Super Contributor
timestamp: August 18, 2012, 04:25:56 pm
content: While searching for a way to get my hands on a cheap and accurate 16 bit dac, i stumbled across this tool, you enter in all the resistance values you have on hand, and it goes ahead and calaculates the layout for the least level of error,http://bretm.home.comcast.net/~bretm/R2RLadder/and here is the thread that i found it inhttp://www.nerdkits.com/forum/thread/1815/now while i know not everyone would go to the bother of an r/r2 ladder dac, i was chasing a level of accuracy that generally was in the 10's of dollars range rather than cents to single dollars, so this approach ended up cheaper and better suited for myself,

author: slateraptor
author_rank: Frequent Contributor
timestamp: August 18, 2012, 05:19:41 pm
content: 16-bit R-2R DAC. Riiiiiiight.P.S. Hinting as to why you'll be hard-pressed to design an effective 8-bit R-2R DAC at reasonable cost, consider the error induced by resistor tolerance of the MSB, then compare it to the contribution of the LSB assuming that resistor has 0% tolerance.
Teenage Mutant Nippon Moths  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 15, 2012, 03:03:59 pm
content: http://www.huffingtonpost.com/2012/08/14/fukushima-mutant-butterflies_n_1777180.html?ncid=edlinkusaolp00000009

author: FenderBender
author_rank: Super Contributor
timestamp: August 15, 2012, 10:38:29 pm
content: Freaky stuff...
Is it possible to buy parts directly from Fluke or Flir? - Page 1
Forum section: electronics / general

author: king.oslo
author_rank: Frequent Contributor
timestamp: August 16, 2012, 12:25:14 pm
content: Hello there,I was thinking about a thermal imaging camera. Perhaps something like this, and repairing it:http://www.ebay.com/itm/Fluke-Ti10-Thermal-Imager-NEEDS-REPAIR-FLAT-RATE-REPAIR-CT2-/170896417918?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D1366305205528808058%26pid%3D100015%26prg%3D1017%26rk%3D1%26#ht_926wt_1040I am a beginner, so I thought it would be a good challenge to work out the problem.My question is, do Fluke and/or Flir sell parts directly to me, or do I have to submit the unit for repair should I decide that I need a new display, custom chip or board?Thank you for your time.Kind regards,MariusPS: Does anyone have an opinion whether this could be a relatively recoverable problem?

author: djsb
author_rank: Super Contributor
timestamp: August 16, 2012, 10:16:44 pm
content: I have bought service manuals and received quotes for parts from Fluke (UK).The parts are shipped from Holland (probably because of the former connection with Philips test and measurement division). Contact your local service and repair centre and ask them.David.

author: FenderBender
author_rank: Super Contributor
timestamp: August 16, 2012, 11:33:42 pm
content: Think it might depend on how old the unit is. That looks fairly new. They may have parts in stock. Older stuff might not really be readily available.

author: Devian
author_rank: Contributor
timestamp: August 17, 2012, 06:16:08 am
content: I think they shoul have distributors or official resellers in your local market, try to find help from them, maybe they are more efficient.
Dave Made me do it... - Page 1
Forum section: electronics / general

author: kolbep
author_rank: Frequent Contributor
timestamp: August 14, 2012, 07:33:40 pm
content: Well, there you go. Thanks to Dave in this blog :https://www.eevblog.com/forum/blog-specific/eevblog-271-zoom-h1-recorder-teardown/msg106707/#msg106707I have now ordered my Zoom H1 on Ebay. Only Cost about R950.00 ZAR Including Shipping to South Africa (I hope Customs doesn't hit me with a big charge on top of that). Should arrive in about 2 to 3 weeks.The main reason for me going for a mobile recorder is that I do DVD's of Weddings, Plays, Concerts, etc Part time. Since I started doing that, I always brought a DVD Recorder, just to get clean audio for my video. With that it meant hooking up a camera to get a video signal so that the recorder would 'switch' to that AV source, Then I had to get power and audio cable from the Sound desk, and then I had to have a monitor so that I could navigate the DVD recorder menus, and to make sure I was getting sound. then find a place to stick it all.At least from now on, I can just pop the H1 next to the mixer, and plug it in. Or Point it at the speakers if there is no line port available.Thanks for making it easier Dave....P

author: EEVblog
author_rank: Unknown
timestamp: August 14, 2012, 09:50:22 pm
content: Careful not to use the auto level control, it kinda sucks!Dave.

author: T4P
author_rank: Super Contributor
timestamp: August 15, 2012, 12:21:55 am
content: Recently i got a recorder also ... all of their auto-level fails to work properlyUsually i just normalize the audio in vegas

author: kolbep
author_rank: Frequent Contributor
timestamp: August 15, 2012, 04:26:20 pm
content: Thanks for the warning.I think Chris also mentioned it.Regarding the AGC :I do not like it when devices try to think for me.When doing Videoing, I always set exposure, focus and white balance manually (Just the way I like it).
Printing Colour at the Optical Diffraction Limit - Page 1
Forum section: electronics / general

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: August 14, 2012, 04:27:12 am
content: Karthik Kumar et al. published a paper,Printing Colour at the Optical Diffraction Limit, detailing how one could construct colour images without the use of inks and dies.The technique uses nano scale metal reflectors to manipulate light to diffract and reflect at specific wavelengths. This effect is very similar to diffraction grating - the rainbow effect you see on CDs and DVDs. These discs have tiny features in the reflection layer that causes each wavelength light to bounce off at different angles. That is, blue reflects at slightly different angles compared to red, thus dispersing the colours of the initial white light. In the paper above, they found a way to control this reflection effect and create colour images at 100,000 DPI resolution.QuoteImpressive stuff!

author: G7PSK
author_rank: Super Contributor
timestamp: August 14, 2012, 07:30:39 am
content: Nature got there first That's how the colour works on many insect wings like butterfly's and dragonfly's wings and many beetles.

author: Gall
author_rank: Frequent Contributor
timestamp: August 14, 2012, 10:33:32 am
content: This is very similar to Lippmann process.http://en.wikipedia.org/wiki/Lippmann_plate
Thought you guys would like to see this (Dissolving an IC Package) - Page 1
Forum section: electronics / general

author: orbiter
author_rank: Frequent Contributor
timestamp: August 13, 2012, 09:33:11 am
content: This is one of the channels I'm subscribed to on You tube.In the video bkraz333 (Ben) dissolves IC packages with fuming nitric acid to reveal the die's

author: free_electron
author_rank: Super Contributor
timestamp: August 13, 2012, 10:16:25 am
content: This is normally done with boiling sulfuric acid or a mixture of nitric and sulfuric acid. advantage of sulfuric acid is that it does not attack the covar alloy used of the ic pins.you need yellow or white fuming nitric acid.the procedure is : etch at 100 degree C , dip in cold fuming nitric acid afterwards , then rince in isopropanol or acetone. final cleaning is typically done with MEK ( Methyl-ethylene-ketone : this is commonly known as PVC glue. although real MEK is more pure. )we use a jet-etcher. it takes less than a minute to decapsulate with this. it has a rubber nozzle with two concentric tubes and with the right shape of the die. it vacuum clamps the package and then hot acid is sent throught the outer tube while vacuum is applied to the inner tube.

author: orbiter
author_rank: Frequent Contributor
timestamp: August 13, 2012, 10:49:23 am
content: I didn't know this was necessary or even possible before today, however I'm curious now.. Why do the chips need decapsulating?Is it to check/copy the circuit etc, or something else?

author: SeanB
author_rank: Super Contributor
timestamp: August 13, 2012, 11:22:33 am
content: Well, as FE actually is an IC designer you do need to see exactly how the part you just fried failed, or why the one batch is dying in 3 months after passing initial testing fine. As for the rest of us I guess to check if that job lot you got from Unlce Wing Li off the Shenzhen flea market is actually the right part, or a fake, before you put together 1000 boards. Or you have a house branded device to repair, and the original manufacturer is bust and gone. Or you are just curious to see what is inside, and all you have are DIP packages, as ceramic are so easy to unpop without damaging them, and work even in the vacuum chamber while getting probed and imaged.

author: orbiter
author_rank: Frequent Contributor
timestamp: August 13, 2012, 12:05:43 pm
content: Ah ok, got ya. Thanks for explaining.

author: GeoffS
author_rank: Unknown
timestamp: August 13, 2012, 01:13:33 pm
content: There's an interesting article (or several articles) over at Sparkfun about fake ICs they bought and deconstructing them to find out what they actually were.http://www.sparkfun.com/news/384

author: free_electron
author_rank: Super Contributor
timestamp: August 14, 2012, 10:09:20 am
content: Failure analysis , quality assurance ( like checking the injection molding does not deform bond wires. Only way is to remove the epoxy again ). Reverse engineering. Troubleshooting etc... All kinds of reasons.
Digital Pocket Radio - Page 1
Forum section: electronics / general

author: DavidDLC
author_rank: Frequent Contributor
timestamp: August 13, 2012, 06:43:41 pm
content: I have been looking on the web, google and some other engines for the next item:Digital pocket radio, with real antenna ( not using the headphone wires as antenna ), with headphones output, and preferable no built-in speaker.And I have not been able to find a thing, so I'm wondering if somebody here in the forum knows a good radio with the descriptions I gave

author: G7PSK
author_rank: Super Contributor
timestamp: August 13, 2012, 08:17:29 pm
content: Is this the sort of thing.http://www.amazon.co.uk/Am-Fm-Digital-Pocket-Radio/dp/B004IOHWFA

author: DavidDLC
author_rank: Frequent Contributor
timestamp: August 14, 2012, 06:13:11 am
content: Hey thank you for the link, unfortunately that model eats a lot of batteries I checked the reviews for it.I already bought a Sangean radio, hopefully it has good reception on my apartment.David.
Wave soldering tip, not quite sure how to use it properly - Page 1
Forum section: electronics / general

author: jeremy
author_rank: Super Contributor
timestamp: August 13, 2012, 10:46:05 am
content: Hi all,I recently got hold of a small gull wing tip for my Weller wmrp pencil, but I am having trouble using it to solder. Does anyone have any tips on how much solder to apply, how fast to slide the iron, temps, etc ? I've managed to do a few good tqfps, but most of them just end up with big swipes of solder covering multiple pins. It's quite frustrating as the lab techs I often speak to seem to think they are the best thing since sliced bread. They are much faster than me with my microscope and needle tip.I'm using lead-free exclusively, don't really have a choice in the matter. It's good stuff though, not your jaycar cheapie solder. And I always make sure my tip is clean.Thanks in advance!

author: SeanB
author_rank: Super Contributor
timestamp: August 13, 2012, 11:27:00 am
content: A lot of flux, a hot clean tip and a minimum of solder. Basically tin the pads, tin the leads and then apply more flux and place the IC on top of the pads, align and then touch with a freshly cleaned tip until it reflows. Remove the tip and inspect. I used that method on flatpacks, and when the boss asked for the tip to use I replied it had an attachment, me. At $100 for the tip I was not letting it out of my sight, you came there to use it.

author: nanofrog
author_rank: Super Contributor
timestamp: August 13, 2012, 06:50:06 pm
content: I have the same iron and also have the NTG tip. AsSeanBsaid, pre-tin the pads (and pins if possible, package permitting), and use a lot of flux (liquid from a bottle seems to create fewer bridges than a flux pen as more can be applied in my experience). If you do use a pen, flux the pads and pins separately, as it gets more flux per joint. Tack the corners, then use a little bit of solder on the NTG (won't hold that much anyway, as it's not large, but you don't want a blob sitting there if inverted), and reflow the tinned surfaces together.It does take some practice, so don't get frustrated.
Danny Hillis: Back to the future (of 1994) - Page 1
Forum section: electronics / general

author: diracshore
author_rank: Regular Contributor
timestamp: August 05, 2012, 07:23:56 am
content: http://www.ted.com/talks/lang/en/danny_hillis_back_to_the_future_of_1994.html

author: EEVblog
author_rank: Unknown
timestamp: August 05, 2012, 11:47:54 am
content: Very interesting!Dave.

author: saturation
author_rank: Super Contributor
timestamp: August 06, 2012, 09:33:00 pm
content: I'm not sure Hillis described anything new nor is his viewpoint unique, this is one of the tenets of the history of technology.http://en.wikipedia.org/wiki/History_of_technologyConsider what changes fire, wheel, plow, gun powder, plastics etc., caused during its emergence will show computers follow what other technologies did before it. Even the rates of change is anticipated, each future technology being greater than the next.By the time of the Hillis TED talks, computers were already well established, as it began in the early 1980s; what he discussed is today called genetic algorithms and neural networks, and while a tool today, isn't the panacea he made it seem to be in 1990s.Here's an example of where the history of technology can be applied: if neural networks were indeed to be revolutionary, it would have caused an explosion of learning machines and growth since its inception; which has not yet to be. So clearly, some other key is missing, and current approaches to programming continue to study as much the fundamentals of network topologies and less practical implementations. For practical solutions, most folks still rely on traditional defined algorithmic approaches, 18 years later, that would be truly a long time by what is known about rates of technological change.

author: diracshore
author_rank: Regular Contributor
timestamp: August 11, 2012, 05:35:57 pm
content: Much of what he discusses I have read in The Singularity is Near by Kurzweil. But the video predated that book by 5 years.http://www.t-generation.ru/books/Raymond%20Kurzweil%20-%20The%20singularity%20is%20near.pdf

author: saturation
author_rank: Super Contributor
timestamp: August 11, 2012, 06:01:25 pm
content: Thanks for the link. Alvin Tofler popularized the speed of change and the fusion of man-machine back in the 1970s with 'Future Shock' and even before that, by Thomas Kuhn in 1962:http://en.wikipedia.org/wiki/Paradigm_shiftWith roots back in 1947. Of all, Kurzweil unfortunately, deserves least credit for simply being a derivative of the more unique works mentioned above, he uses that term 'paradigm shift' fairly loosely but never quotes Kuhn as the source. Even the premise of 'singularity' was earlier than 1960s with the term cyborg and its implications. Nevertheless, Kurzweil imparts a different spin on the same top, but given limited reading time, one maybe better served with more original thoughts.
Loads and loads and loads of test equipment ...  - Page 1
Forum section: electronics / general

author: T4P
author_rank: Super Contributor
timestamp: August 12, 2012, 05:16:53 am
content: http://amp8.com/etc/annai/lja1mdn.htm

author: firewalker
author_rank: Super Contributor
timestamp: August 12, 2012, 08:38:27 am
content: Time tends to tick slower when present in places like that one!!! Excellent.I believe though that his book collection is more exciting!Alexander.
Maybe you could someday use this to get your canyon video - Page 1
Forum section: electronics / general

author: sile
author_rank: Contributor
timestamp: August 12, 2012, 02:11:34 am
content: MIT project that has an autonomous airplane than can navigate very tight spaces. If they can do it for an airplane with a 2m span at 20 mph it should be much easier with a quad copter.http://gizmodo.com/5933881/autonomous-mit-plane-turns-a-parking-garage-into-its-own-personal-slalom-course

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: August 12, 2012, 04:23:32 am
content: I want one.

author: EEVblog
author_rank: Unknown
timestamp: August 12, 2012, 04:51:51 am
content: Wow, nice!Dave.

author: RCMR
author_rank: Frequent Contributor
timestamp: August 12, 2012, 07:59:38 am
content: Definitely very cool!

author: firewalker
author_rank: Super Contributor
timestamp: August 12, 2012, 08:30:27 am
content: Very good!Alexander.
forum issue (left border) setting (for Dave) - Page 1
Forum section: electronics / general

author: Kevin.D
author_rank: Frequent Contributor
timestamp: August 12, 2012, 10:46:58 am
content: I think General chat is the right place to ask this ,I don't see a specific topic section for forum issues .Dave would it be possible to alter the "left border setting" in your simple machines forum software so that it can use more of the available display (I only use 1024 *768 monitor at this computer).Like when you click on "recent posts" it's great ,the posts that are displayed use the whole of the available screen width and you can see whole 800 *600 pictures that have been posted .But when you click on an individual thread the posts are displayed in this narrow band of screen and you lose like a quarter of your display to this left border and so most all pictures that have been posted are always to wide to view on the screen so you have to scroll horizontal along to see bits of them .

author: Simon
author_rank: Unknown
timestamp: August 12, 2012, 12:57:50 pm
content: Might be a good idea to look into. Problem is with things like this there is limited control over what you can do. But c'mon time to update that screen ? My only 1024 * 768 screen is ny laptop but I wanted a small one and when at home I connect it to a 1280 * 1024 screen. Most things these days are hideous on anything smaller.
Delorean time circuit for Dave lab - Page 1
Forum section: electronics / general

author: Tooms
author_rank: Unknown
timestamp: August 11, 2012, 09:02:16 am
content: Hi Davejust seen this on another site, maybe an build project to have on your wall in the lab with recording time of the video and maybe the time you have to remember to go home to the wifehttp://learn.adafruit.com/delorean-time-circuitNote: i have nothing todo with the page, just found it an thinking it was some thing for DaveTooms
Anyone know where to purchase Hakko Hot Tweezers in Aus? - Page 1
Forum section: electronics / general

author: jbomba
author_rank: Contributor
timestamp: August 10, 2012, 01:10:14 pm
content: Hey guys im tryna find somewhere to purchase the hakko hot tweezers for my fx-888 iron i know they exist but i cant find them anywhere even on the net. I really dont wanna go down the route of purchasing another cheap aoyue station from china.

author: T4P
author_rank: Super Contributor
timestamp: August 10, 2012, 02:26:26 pm
content: Well for one they are available in hot tweezers alone ... on aliexpress

author: David_AVD
author_rank: Super Contributor
timestamp: August 10, 2012, 10:07:02 pm
content: TryWES Componentsin Sydney. I'm pretty sure they sell them.
Is this Really Dave - Page 1
Forum section: electronics / general

author: Mr Smiley
author_rank: Frequent Contributor
timestamp: August 09, 2012, 06:23:59 pm
content: Hi,Looking at the data sheet i came across for the lcd Dave is considering for his usb psu.http://www.egochina.net.cn/eBay/Download/JHD802A.pdfUnder section 15.Handling Precautions,,,, is that really Dave in his youth perfecting the Tongue technique and take it apart methods

author: ProBang
author_rank: Contributor
timestamp: August 09, 2012, 06:35:42 pm
content: Never!Right angle, but wrong side...

author: Simon
author_rank: Unknown
timestamp: August 09, 2012, 08:05:38 pm
content: Haha very well spotted.

author: ftransform
author_rank: Frequent Contributor
timestamp: August 09, 2012, 08:33:46 pm
content: That is the most amusing datasheet I have ever seen.

author: FenderBender
author_rank: Super Contributor
timestamp: August 10, 2012, 01:19:15 am
content: Haha I love the cartoon LCDs. They're so cute!

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: August 10, 2012, 03:58:27 am
content: NO DC!
Campaign to stop people from making vertical videos... - Page 1
Forum section: electronics / general

author: rsjsouza
author_rank: Super Contributor
timestamp: August 09, 2012, 07:14:41 pm
content: I received the link below and found the video pretty funny... and a printing of the sign is in order.Page with sign and video

author: Agurri
author_rank: Newbie
timestamp: August 09, 2012, 11:04:28 pm
content: This was very funny. They are very talented.

author: rsjsouza
author_rank: Super Contributor
timestamp: August 10, 2012, 12:55:50 am
content: They are really good; I received this link from a promotional e-mail and started following other videos from them on youtube... I had to shut down the browser or I would not be able to work anymore - I was holding myself to not laugh hard at work...I love how they use Muppets-like characters - I loved them as a child and still love them!

author: EEVblog
author_rank: Unknown
timestamp: August 10, 2012, 01:15:15 am
content: That was awesome!Dave.

author: Psi
author_rank: Super Contributor
timestamp: August 10, 2012, 02:31:05 am
content: LOL, that's the funniest video i've seen in weeks

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: August 10, 2012, 03:55:50 am
content: The gloveandboots channel is hilarious. Check out their other videos.
Oscilloscope problem - Page 1
Forum section: electronics / general

author: flyingfrancisco
author_rank: Contributor
timestamp: August 09, 2012, 04:19:57 pm
content: Hello everyoneI have a Kenwood 20Mhz cs4025 scope that has started to produce a "quivering " image. This is not that obvious when using it to take measurements but very bad when I connected to !Vp-p position to calibrate my probes .i have changed to different probes and have the same problem.Any ideas?Thxfrancisco

author: tom66
author_rank: Super Contributor
timestamp: August 09, 2012, 07:28:33 pm
content: Quote from: flyingfrancisco on August 09, 2012, 04:19:57 pmPossibly a bad capacitor in the power supply letting through 100 or 120 Hz noise. Can you get a signal sync'd to the mains input - if so does he rippling line up?
PCB inspection software (preferably free) - Page 1
Forum section: electronics / general

author: imanhp
author_rank: Newbie
timestamp: August 09, 2012, 07:11:42 am
content: Hi Guys and Gals!I have been looking all day yesterday for a Live PCB inspection tool (software for webcam and stills) and have not found anything good that just works and does not cost ridiculous amounts of money.We have these really cheap USB microscope cameras that work really well and often we just take a screenshots and annotate them in paint/gimp/photoshop. Works just fine most of the time.But sometimes when you need to do some more advanced stuff the regular paint-tools just don't cut it.It would be really nice with tools like area, radius, circumference, distance annotations.Other features that would be nice to have is:* Image difference/comparison (eg. to compare two different batches of the same PCB when looking for bugs/faults).* Image distortion (ability to distort image if camera or PCB is not exactly perpendicular to each other)* General image enhancement filtersWell these are some of the things I can come up with at the moment.Does anyone know of or use software that has some of these features described above?brIman

author: free_electron
author_rank: Super Contributor
timestamp: August 09, 2012, 02:36:33 pm
content: I hear orbotech makes really good systems that do exactly that.... They are called AOI.If you got a few 10K$ laying around i'm sure you could exchange those for such a machine. If not.... Mspaint it is...
optical wireless mouse ? - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: August 08, 2012, 08:45:02 pm
content: As I'm learning CAD I have discovered the joys and freedom of 3D mice..... and..... the costs.Scouring eBay I found this:http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=380452177518&clk_rvr_id=373191040640&item=380452177518&lgeo=1&vectorid=229508#ht_2051wt_984decent product or trash ? anyone used one before ?

author: tom66
author_rank: Super Contributor
timestamp: August 08, 2012, 08:52:03 pm
content: I've tried to use one...And couldn't do it.

author: Simon
author_rank: Unknown
timestamp: August 08, 2012, 08:53:32 pm
content: so how does itwork, do you point it at a target or something ?

author: Simon
author_rank: Unknown
timestamp: August 08, 2012, 09:15:12 pm
content: hm, £90 for a real one or make my own ?:http://www.holtek.com/english/docum/computer/82m28a.htmcan one make a 3D mouse or are they that complicated ? I'm guessing high prices are due to a niche demand.

author: Simon
author_rank: Unknown
timestamp: August 09, 2012, 06:59:58 am
content: I don't think the original item I linked to is a 3d mouse, just a novel 2d mouse but they called it 3d because everyone is calling any three dimensional lump of plastic a 3d mouse. You just have to love trying to find stuff on eBay these days and the internet in general
ENELOOP AA's with tabs - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: August 09, 2012, 05:06:40 am
content: Does anyone know of a NZ/AUS shop that sells eneloops AA batteries that have solder tabs?I found a few international stores but i was hoping for something a bit more local.http://www.batteryspace.com/nimhrechargeablecellsanyoeneloopaa12v2000mah4pcs---immediatelyusable.aspxhttp://store.batteriesamerica.com/hr-3utgsanyoeneloopaabattery-12volt2000mahrechargeableaaretainsitscharge.aspxhttp://shop.lindinger.at/product_info.php?products_id=71507&language=en
Amazon and EEVblog - Adblock - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: February 12, 2012, 12:37:03 am
content: Greetings EEVBees:--I recently had a problem, and had to reload Firefox Nightly. I discovered that although I thought I had Adblock Plus configured correctly, that formerly it had been blocking the Amazon link, whereby Sagan gets credits for new shoes. I am fixing to order 25 pounds of popcorn and some special salt (group buy), and I will be using the EEVblog Amazon link.--So make sure you have your Adblock, Noscript and other guardbots greenlighted for this forum, and use that Amazon Clickthrough Link, it will cost you nothing.“Horse sense is the thing a horse has which keeps it from betting on people."W. C. Fields (William Claude Dunkenfield) 1880 1946Best RegardsClear Ether

author: sacherjj
author_rank: Frequent Contributor
timestamp: February 12, 2012, 01:15:58 am
content: Really there is no reason to not have AdBlock set to let everything through on EEVBlog. I remember posting about this a while ago. The ads on this site are both relevant and non-annoying.

author: Rerouter
author_rank: Super Contributor
timestamp: February 12, 2012, 01:22:21 am
content: by default adblock plus only blocks the google ads, which usually arent all that relevent, you have to specify filters for the rest if you really wanted to block them, so most people get to see the quality ads on daves site,

author: EEVblog
author_rank: Unknown
timestamp: February 12, 2012, 05:07:25 am
content: Thanks guys.Yes, it costs nothing to buy through my Amazon affiliate link:http://www.amazon.com/gp/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2F&tag=ee04-20&linkCode=ur2&camp=1789&creative=390957So an easy and painless way to help support the blog.And I get about 6% or so on the price on everything, either Amazon or a third party storeDave.

author: silicon_ghost
author_rank: Contributor
timestamp: August 08, 2012, 03:35:41 pm
content: Quote from: EEVblog on February 12, 2012, 05:07:25 amDave, that link does not get me the "A with swoop" Amazon logo when I create a shortcut for it. I futzed around at the EEVblog.com/amazon page and got this link:http://www.amazon.com/?tag=ee04-20&camp=1&creative=4265&linkCode=as4&ref-refURL=http%3A%2F%2Fwww.eevblog.com%2Famazon%2Fwhich does give me the nice Amazon logo on the shortcut. I see darn near zero similarity between them. Both of these links properly get you a commission?

author: EEVblog
author_rank: Unknown
timestamp: August 09, 2012, 12:56:17 am
content: Quote from: silicon_ghost on August 08, 2012, 03:35:41 pmAny link that has my code "ee04-20" in it will get the commission.Dave.
joke / offtopic kinda - Page 1
Forum section: electronics / general

author: northlondonsage
author_rank: Contributor
timestamp: August 08, 2012, 09:54:21 am
content: Just unboxed my new Hantek DDS 3X25.I'm enjoying it so far. Quite handy.I thought you might enjoy this though from the instruction booklet's page on maintenance and cleaning:"Caution: In order to not mangle the equipment, you should not put it in fog, water or impregnate."Michael

author: David Aurora
author_rank: Frequent Contributor
timestamp: August 08, 2012, 10:07:48 am
content: For a second I read that asfrog. Now that would be a bad idea...

author: baljemmett
author_rank: Unknown
timestamp: August 08, 2012, 10:43:37 am
content: Quote from: northlondonsage on August 08, 2012, 09:54:21 amI imagine if you tried to impregnate something that size you might well end up with mangled equipment, yes!
Phillip Harris signal generator - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: August 07, 2012, 09:08:31 pm
content: I have just recieved this today, i got it on ebay for £13.45 inc postage. It was labeled as a power supply in the listing but was obviously not that from the photograph, it's a signal generator. I was hoping that some one might have some information on the unit, I am not sure of the date of manufacture but I would guess its late 60's early 70's from the construction. It in working order in as much as that I get an output signal in both sine and square wave and that is variable in level and frequency, I know no more at this time but any information would be appreciated.

author: northlondonsage
author_rank: Contributor
timestamp: August 08, 2012, 10:57:20 am
content: I saw that on ebay. I messaged the seller to tell him it was a signal generator not a power supply but he obviously ignored me. Good buy...

author: david77
author_rank: Frequent Contributor
timestamp: August 08, 2012, 02:33:54 pm
content: I think the 6817 is a date code on the yellow Dubilier cap, so probably made in/after 1968.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: August 08, 2012, 02:38:14 pm
content: Looks very clean for its age!

author: G7PSK
author_rank: Super Contributor
timestamp: August 08, 2012, 04:15:43 pm
content: I would think that it has been in a school all its life. There are no calibration stickers but lots of electrical safety test stickers the last one expired in 2011.

author: Fraser
author_rank: Super Contributor
timestamp: August 08, 2012, 06:38:41 pm
content: I have bought modern Philip Harris data logging equipment and have experience of teh companies support. Unless someone on the WWW has some old documentation I think you will be stuck in this respect and PH do not supply schematics even in original documentation. I have written to Philip Harris several times in the past asking for no more than a copy of the instruction manual for equipment that was current only two years ago. The response....Zilch ! not even a 'sorry we can't help'. I have read teachers reports that they are a very frustrating company to deal with. Deleting products and support at the same time.... not nice. Philip Harris also don't like to supply software, even when a product is out of support. A nightmare company IMHO.I hope the sig gen is of use/interest but I am now avoiding Philip Harris kit. I note that much of it sells very cheaply on ebay........bad reputation ?Fraser

author: G7PSK
author_rank: Super Contributor
timestamp: August 08, 2012, 06:58:53 pm
content: It had its first use in anger today, I have just built a couple of bat detectors and wanted a sound source to test them with so I just stuck a small speaker on itand wound the frequency up to around 80Khz or so worked very well.
Is the STORAGE button on Rigol DS1102E/DS1052E supposed to glow? - Page 1
Forum section: electronics / general

author: tom66
author_rank: Super Contributor
timestamp: August 07, 2012, 11:03:39 pm
content: So recently I took delivery of a Rigol DS1102E, I'm quite happy with it and it appears to work well.One thing I noticed that when booting up, all LEDs in the 3x2 "MENU" area glow... except the "storage" button. It's constantly dark, even if you press it while running. Seems kind of strange to me. Is it a known defect? Are any other glowing buttons giving faults on other DS1000E scopes?Not a big deal (scope is still completely usable), but would be interested to hear if anyone else has reported this issue.I got it from a UK distributor with a 3 year warranty so I'm not worried about having to send it back for more serious faults.

author: KTP
author_rank: Frequent Contributor
timestamp: August 07, 2012, 11:27:19 pm
content: yes the storage button is supposed to glow.i am guessing a bad solder joint on that led on your scope.

author: tom66
author_rank: Super Contributor
timestamp: August 07, 2012, 11:34:22 pm
content: Quote from: KTP on August 07, 2012, 11:27:19 pmI think this confirms it. I just pressed it, and it flickered a bit. Maybe some production lakey was half-asleep and didn't notice the LED self-test when powered up... or maybe they don't test them at all. Who knows...
Audio Systems on 35mm Projectors - Page 1
Forum section: electronics / general

author: Nuckollsr
author_rank: Newbie
timestamp: August 04, 2012, 07:57:04 pm
content: Good day folks! I've just taken on the task of assisting one of my neighbors in the task of refurbishing some of the audio equipment in the family's movie theaters . . . one a sit down the other is a drive-in. He's still running 35mm projectors but has goals to go digital. In the mean time, I'm patching up some ancient RCA MI-12188 amplifiers (imminently rebuildable). He has no schematics on the pre-amps that read the photo-pickups for the sound track.Wonder if anyone has ever run across exemplar equipment that would get me pointed in the right direction for understanding how these things work. Given modern electronics and fast-turn ECB fabrication, I can probably build new pre-amps faster than I can get details for chasing demons out of the old ones.Thanks!Bob . . .http://aeroelectric.com

author: bilko
author_rank: Frequent Contributor
timestamp: August 04, 2012, 09:21:23 pm
content: I used to service this gear for a recording studio in the '80sLook up Westrex or try this linkhttp://en.wikipedia.org/wiki/Sound-on-film

author: Nuckollsr
author_rank: Newbie
timestamp: August 07, 2012, 12:59:29 pm
content: Thanks for the leads.I've found some service manuals on vacuum tube hardware that read soundtracks on film. When the drive-in I'm working on closes for the season in a few weeks, I'll get a chance to pull some covers off, peek inside and take some measurements. I don't think it will be difficult to craft a solid state pre-amp to bias up the photocell and read it's output.The power amplifiers in this system are RCA MI-12188 . . . parallel-push-pull 807's driving a 70v line. Found a website that features restorations and updates to this venerable beast. Turns out not to be very 'hi-fi' . . . which is forgivable when the load is a couple hundred 5' speakers on poles! I'm planning to replace the amplifiers with modern solid-state . . . found a good deal on 4 ohm step up to 70v line transformer on e-bay. I can fit him with dual amps for under $300. I think I might be able to sell some of the RCA's for more money than the new gear costs.He has an FM broadcast transmitter too that was poorly installed . . . the antenna isn't even cut to the transmitter's center frequency. I'm going to build him a new antenna and put a wattmeter on the transmitter to make sure it's working. It 'sounds' okay but cars at the fringes of the lot don't get a really quieting signal strength. I'm betting that will be easy to clean up too.Thanks for the heads-up!Bob . . .
holy ****ing hell first picture from the curiosity rover!!!! - Page 1
Forum section: electronics / general

author: ftransform
author_rank: Frequent Contributor
timestamp: August 06, 2012, 06:51:26 am
content: https://lh3.googleusercontent.com/-hQwvriYA5bI/UB9be-zfsWI/AAAAAAAAWLM/1OcIL_hTGH4/s407/mars.jpg

author: PeteInTexas
author_rank: Frequent Contributor
timestamp: August 06, 2012, 06:58:55 am
content: too predictable...

author: Mint.
author_rank: Frequent Contributor
timestamp: August 06, 2012, 07:00:24 am
content: Funny.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: August 06, 2012, 07:08:49 am
content: Anyone else wants to create a new thread on this subject?

author: Mint.
author_rank: Frequent Contributor
timestamp: August 06, 2012, 07:10:27 am
content: Quote from: AntiProtonBoy on August 06, 2012, 07:08:49 amHHAHAHAHAHA!

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: August 06, 2012, 07:50:46 am
content: Quote from: PeteInTexas on August 06, 2012, 06:58:55 amMy mother in law photoshopped into a picture again. meh.

author: Simon
author_rank: Unknown
timestamp: August 06, 2012, 08:07:15 am
content: A bit lame haha. They have a better one at work that started as a group of Martians protesting our arrival but the banner was changed to "Simon's family reunion" as there is a running joke about me being an ET due to my permanent cultural shock.

author: FlyingBrickyard
author_rank: Contributor
timestamp: August 06, 2012, 08:17:05 am
content: I always likedthis one.

author: Mechatrommer
author_rank: Super Contributor
timestamp: August 06, 2012, 02:10:21 pm
content: Quote from: ftransform on August 06, 2012, 06:51:26 amQuote from: FlyingBrickyard on August 06, 2012, 08:17:05 amif that one is a male, where's the female?

author: Psi
author_rank: Super Contributor
timestamp: August 06, 2012, 02:14:51 pm
content: In New Zealand we have an active volcano on white island.There are a few solar powered camera + transmitter stations on the island to keep an eye on it and the data is feed live to the net.One of the cameras is right down in the crater where the terrain is pretty harsh, lots of sulfur dioxide in the air and pockets of superheated rocks.About 8 years ago it was noticed that the live camera feed had changed.It's still there today, although the camera has been moved/replaced.

author: ftransform
author_rank: Frequent Contributor
timestamp: August 06, 2012, 09:21:51 pm
content: lmfao !

author: gxti
author_rank: Frequent Contributor
timestamp: August 06, 2012, 10:56:30 pm
content: NASA has evidence of water on Mars:http://apod.nasa.gov/apod/ap050401.html
BBC Doc Curiosity Mars Rover Enjoy - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 06, 2012, 09:24:18 pm
content: Well seems we like the mars rover, heres the recent bbc docEnjoy

author: icon
author_rank: Regular Contributor
timestamp: August 06, 2012, 10:00:50 pm
content: I used to absolutely love Horizon; watched it for decades. But I just can't bear to watch it now, nor any other documentary programme regardless of how potentially interesting the content, because they have all adopted this ridiculous, panting, breathless narration style, accompanied usually by a sodding drone underneath. They also seem incredibly repetitive, stuffed full of hyperbole, and composed of sub-five-second cuts. It's like the visual equivalent of a somebody running an audio track through a compressor turned to 11. So, since factual programmed were the only things I could bear to watch anyway, the bloody telly can sit silent in the corner of the room as far as I'm concerned.Evidence to the contrary notwithstanding, I am not 86, nor did I fight a war for the likes of you. Not that there's anything wrong with being 86. Or fighting wars.CheersJohn
The complete collection of practical electronic engineering books by R.M. Marsto - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: August 05, 2012, 10:44:26 pm
content: I found these books as toorent file.. but are they freeware not copyrighted so OK to download..anybody knows?Practical Electronic Design Books[Team Nanban]tmrgEnglish | PDF | 562.59 MB(402 mb in compressed format)DESCRIPTION:The complete collection of practical electronic engineering books by R.M. Marston. Very useful for the practicing engineer or hobbyist.110 Electronic Alarm Projects, Marston.pdf110 Semiconductor Projects, Marston.pdf110 Thyristor Projects Using SCRs and Triacs, Marston.pdfAudio IC's Users Handbook, Marston.pdfDigital Logic IC Pocket Book, Marston.pdfDiode, Transistor and FET Circuits Manual, Marston.pdfInstrumentation and Test Gear Circuits Manual, Marston.pdfLinear ICs, Marston.pdfModern CMOS Circuits Manual, Marston.pdfOptoelectronics Circuits Manual 2nd, Marston.pdfPassive and Discrete Circuits, Marston.pdfPower Control Circuits Manual, Marston.pdfSecurity Electronics Circuits Manual, Marston.pdfTimer-Generator Circuits Manual, Marston.pdfhttp://extratorrent.com/torrent/2760736/Practical+Electronic+Design+BooksTeam+Nanbantmrg.html

author: HardBoot
author_rank: Regular Contributor
timestamp: August 05, 2012, 11:17:11 pm
content: Holy crap, that's a lot of books, a few really good ones too.

author: M. András
author_rank: Super Contributor
timestamp: August 06, 2012, 08:10:05 am
content: i doubt it would be freeware. its on torrent so free, nobody loses profit from things what inviduals wouldnt buy anyway

author: diracshore
author_rank: Regular Contributor
timestamp: August 06, 2012, 08:32:52 am
content: If demonoid ever comes back check out torrents uploaded by a user called cadmannow!

author: slateraptor
author_rank: Frequent Contributor
timestamp: August 06, 2012, 09:04:02 am
content: Quote from: diracshore on August 06, 2012, 08:32:52 am

author: M. András
author_rank: Super Contributor
timestamp: August 06, 2012, 08:43:30 pm
content: Quote from: diracshore on August 06, 2012, 08:32:52 amhope it comes back, isohunt is a bit crappy lately... on the new torrents