hybridfree/eevblog-posts huggingface dataset:
Showcase: Sony Watchman FD-20A - Page 1
Forum section: electronics / general

author: JefferyB
author_rank: Newbie
timestamp: February 01, 2014, 09:59:22 am
content: (figured this was the right place for this? Sorry if its not, feel free to move it to the correct forum!)So I was just digging in an old box I had lots of stuff in, and this was at the very bottom of the box, and at first I was like :O "I've not seen this in years, wounder if it still works!". So I looked in the battery area, figured I would see the worst, but no, they were all still like new, though they didn't work. So after some fresh battery's, I was like wow it still works!!! Sadly because UHF and VHF are both basically gone, I couldn't get anything, unless its plugged into one of those adapters.... I did get a strong radio channel on the VHF setting.. lol Some pics for you all:So there ya go! I'm not gonna take it apart, because sometimes I end up messing something up LOL! I'm sure its a collectors item, even though its seen its fair share of uses, and someone at one point had put some kind of tape on it... Enjoy!Sorry for the lighting, these cheap "energy saving bulbs cast a yellow light... on everything even on my walls...

author: Zbig
author_rank: Frequent Contributor
timestamp: February 01, 2014, 02:52:24 pm
content: Quote from: JefferyB on February 01, 2014, 09:59:22 amThat's what the White Balance controls are for

author: johnboxall
author_rank: Unknown
timestamp: February 02, 2014, 06:43:00 am
content: Quote from: JefferyB on February 01, 2014, 09:59:22 amThanks for the memories, remember that from the "Towards 2000" TV show when I was a child.You can get energy saving bulbs in different colour temperatures.

author: JefferyB
author_rank: Newbie
timestamp: February 03, 2014, 10:20:02 pm
content: Quote from: tronixstuff on February 02, 2014, 06:43:00 amYes well, these where labeled as "Bright White".. lol
Steve Jobs introduces the mac video from 1984 - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: February 02, 2014, 12:05:07 pm
content: Interesting Steve Jobs from 1984."Not seen since 1984" supposedly.Not to many years out of his garage at this point.http://techland.time.com/2014/01/25/steve-jobs-mac/?xid=newsletter-weeklyKT

author: opablo
author_rank: Regular Contributor
timestamp: February 03, 2014, 06:10:19 pm
content: one heck of a salesman... (Sorry if I offend any fanboy out there)

author: Dave
author_rank: Super Contributor
timestamp: February 03, 2014, 07:30:41 pm
content: QuoteDecades later, their target demographic still hasn't changed.
Connector Identification - Page 1
Forum section: electronics / general

author: orion242
author_rank: Unknown
timestamp: February 03, 2014, 02:38:59 am
content: Anyone know if there is a standard connector to mate with this spot marked E1 on this PCB?

author: Dave
author_rank: Super Contributor
timestamp: February 03, 2014, 02:51:38 am
content: This is aTag-Connectfootprint. It saves you the cost of soldering a connector onto the board for programming.

author: orion242
author_rank: Unknown
timestamp: February 03, 2014, 02:53:52 am
content: Dang that was fast.Thanks!!
HD3P01M1 with piggback eprom - Page 1
Forum section: electronics / general

author: johnh
author_rank: Regular Contributor
timestamp: February 02, 2014, 02:05:10 am
content: Whilst poking around the recycle skip at work.I found some old low speed modem shelf from the mid 80's.Out of dozen cards, 3 had these plugged into them. The rest had had mask programmed CPU.No special label on the card.Why would you use these, which would cost more than the mask programmed cpu's?

author: NiHaoMike
author_rank: Super Contributor
timestamp: February 02, 2014, 03:46:40 am
content: Most likely some early production units or a new firmware revision.
Not loaded, not placed etc. - Page 1
Forum section: electronics / general

author: LukeW
author_rank: Frequent Contributor
timestamp: January 31, 2014, 03:03:56 am
content: When drawing up schematics, BOMs, or documentation for assembly contractors, you often see lots of different interchangeable terminology used to specify an empty placeholder spot on the PCB where no component is installed.NP, NL, DNI, DNP etc.It's weird that there are four different terms for the same thing.Do the different terms have any specific meaning in a particular context, so they're not really all the same thing?What's the most common? Is there a "standard"?What's the best terminology to use? What has the lowest probability of causing the assembler to come back puzzled asking what that component is and where its reel is?

author: Alphatronique
author_rank: Regular Contributor
timestamp: January 31, 2014, 03:16:58 am
content: HiDNP see the most popular ,but agree that it have way to much variation that may lead assembly erroryou may add "NI" to your list Not installedas a assembler i hate all that variation ;-)

author: calexanian
author_rank: Super Contributor
timestamp: January 31, 2014, 03:58:52 am
content: Thats why we always provide a sample board. Leave nothing to chance!

author: VK3DRB
author_rank: Super Contributor
timestamp: January 31, 2014, 01:27:10 pm
content: This highlights a lack of standards. There are IEEE symbol standard. And there should be standards for this term for a not fitted component. Maybe there is, but I have never heard of it and neither has most others.IBM used NOPOP. I have seen some fools use NF (not fitted). That is just stupid because it is ambiguous with nanofarad. Also I have seen DNF (do not fit).One a similar topic, on schematics, some people use an underscore for a net's word delineation. With Altium, that is very bad practice because it is hidden by the schematic wire. SomePeopleUseCamelCaseConsideringThatHighQualityPrintersAndScreensAreNowCommonplace. Others use a hyphen for delineation. But to remove ambiguity they replace a negative sign they use a lower case n and the rest is upper case.
Very Cool 142.560 Crystal Module - Page 1
Forum section: electronics / general

author: Terabyte2007
author_rank: Frequent Contributor
timestamp: February 01, 2014, 04:12:13 pm
content: I found this old but incredibly well built oscillator module last week, it is 142.560 MC. Yes, it's nomenclature is "MC", "Mega Cycles". It has a US stamp, possibly Navy on the side. I think this was before my time, but I would like to know more about it. If anyone used these or can give me a few more details as to what application it was used in that would be wonderful! The case is solid metal with a spring plate and thick metal cap. There are a couple plates inside and what looks to be a dielectric material of some sort along with the piezo material or ceramic material? It also has 3 pins, one marked (G) Ground and 2 others marked (1) and (2).

author: Rory
author_rank: Frequent Contributor
timestamp: February 01, 2014, 04:29:59 pm
content: It's a crystal for an AN/ARC-4 or WE-233A VHF radio.A quick Google search comes up with:http://home.earthlink.net/~navyradio/id5.htmlhttp://www.maritime.org/tech/radiocat/arc4.htmThis is a cool component in that it actually contains two crystals - one for the transmitter and one for the receiver. That is really rare.

author: Terabyte2007
author_rank: Frequent Contributor
timestamp: February 01, 2014, 04:53:40 pm
content: Quote from: Rory on February 01, 2014, 04:29:59 pmThanks for the info. I love this old tech. It really cool to see how engineer's in the past designed technology.
Bug in forum breaks OpenID - Page 1
Forum section: electronics / general

author: jwm
author_rank: Regular Contributor
timestamp: January 31, 2014, 01:03:33 am
content: It seems that OpenID logins are not working on the forum, at least for me. I get an error page that says 'The database value you're trying to insert does not exist: server_url'. when using my OpenID of 'http://notanumber.net'. I have this one browser that is still logged on, but when I close it, I won't be able to get back onto the forum. any ideas? is anyone else seeing this problem?
Back To The Future Musical Announced!!! - Page 1
Forum section: electronics / general

author: Ecobion
author_rank: Newbie
timestamp: January 31, 2014, 08:20:44 pm
content: No, seriously!I just came across this:http://www.bbc.co.uk/news/entertainment-arts-25976383Dave, you will have to make a trip to blighty to come and see it with your family!

author: fenclu
author_rank: Regular Contributor
timestamp: January 31, 2014, 10:07:45 pm
content: Noooo, why? There are some things you just don't do...

author: EEVblog
author_rank: Unknown
timestamp: January 31, 2014, 10:13:39 pm
content: Quote from: fenclu on January 31, 2014, 10:07:45 pmWhy not? It's a different medium.It's not like they are making another movie.

author: fenclu
author_rank: Regular Contributor
timestamp: January 31, 2014, 10:52:57 pm
content: A large part of BTTF's success is contained in the camera work, the scenery and other things that you just cannot replace in a play. Also, there's the profanation factor. Imagine if they would do that with Star Wars. I think it could start an actual War. That's my opinion, anyway.P.S. Imagine Doc Brown singing in falsetto "What did I tell you? 88 MPH!"

author: Bored@Work
author_rank: Super Contributor
timestamp: February 01, 2014, 06:38:24 am
content: Quote from: fenclu on January 31, 2014, 10:52:57 pmDone. 15 years ago. By fans.http://www.infauxmedia.com/Excerpt
ATMega2560-powered Arduino Mega - emulates a PDP-11 - Page 1
Forum section: electronics / general

author: bingo600
author_rank: Super Contributor
timestamp: January 25, 2014, 10:48:38 am
content: This is neat.http://hackaday.com/2014/01/24/minicomputers-on-microcontrollers/http://dave.cheney.net/2014/01/23/avr11-simulating-minicomputers-on-microcontrollersI have actually used one.... (Real PDP-11)Hmm ... I suppose other users of a PDP-11 , now can guess my "haircolor"/Bingo

author: Rerouter
author_rank: Super Contributor
timestamp: January 25, 2014, 11:36:39 am
content: Now if only there was one for the 68K, I'm at a point where i can easily replace the control hardware of an old bit of test gear, but i know bugger all to replicate the functions of the software, (its a 1MSPS spectrum analyser)

author: dfmischler
author_rank: Frequent Contributor
timestamp: January 26, 2014, 12:10:55 pm
content: Quote from: bingo600 on January 25, 2014, 10:48:38 amI used to own one, and used it to make money writing/supporting PDP-11 software. I stopped using it around 1990/91, and got rid of it when I moved in 1999. There is very good emulator software freely available. e.g.SIMH, that will run real PDP-11 operating systems, etc. I spent part of a day a year or two ago setting up a Unix system to run SIMH withRSX-11M-PLUSV4.3. It was considerably faster than any hardware PDP-11 ever built. About as soon as it was working I realized I had no use for it, nor any interest in nostalging over it.Quote from: Rerouter on January 25, 2014, 11:36:39 amThere is emulator software for 68K:Google it. I don't know if there is any way to easily repackage any of these choices to support an embedded application like a spectrum analyzer, though.

author: justanothercanuck
author_rank: Frequent Contributor
timestamp: January 30, 2014, 08:51:47 pm
content: Cool. But unfortunately, like most emulators, it probably won't work with original peripherals.
Crazy scope patterns! - Page 1
Forum section: electronics / general

author: bridgerectifier
author_rank: Contributor
timestamp: January 29, 2014, 04:29:59 am
content: Pump this into your scope in X-Y mode, and see the beauty:

author: Joule Thief
author_rank: Regular Contributor
timestamp: January 29, 2014, 05:28:29 am
content: Thanks for posting the video.The website in the attached link is also very interesting.

author: grumpydoc
author_rank: Super Contributor
timestamp: January 29, 2014, 11:17:43 am
content: That's really awesome - I prefer Atom Delta's oscillofun as a piece of music though.Anyone know of any others?

author: GeoffS
author_rank: Unknown
timestamp: January 29, 2014, 11:23:43 am
content: OP wont be able to answer as they've been banned.

author: BravoV
author_rank: Super Contributor
timestamp: January 29, 2014, 11:32:30 am
content: Quote from: GeoffS on January 29, 2014, 11:23:43 amThey ?Cloned nick ?

author: GeoffS
author_rank: Unknown
timestamp: January 29, 2014, 11:35:51 am
content: Quote from: BravoV on January 29, 2014, 11:32:30 amSorry, should have said 'he' not they.

author: TerraHertz
author_rank: Super Contributor
timestamp: January 30, 2014, 05:20:26 am
content: So cool!From the youtube page:AUDIOIn this part only sine waves (discrete frequencies) were used. Using the harmonic series, i.e. integral multiples of the fundamental frequency, an unlimited variety of sound spectra can be created (additive synthesis). To produce these waveforms the open-source audio programming software Pure Data was used.Which leads here:http://puredata.info/Sigh. Another fascinating thing that would be great to spend days looking into. If I had the time.Actually, with a bit more software layering, it would be possible to make the audio track more musical. Since for any given X-Y pattern it doesn't matter what frequency the waveform is repeating at, all that matters are the X-Y relative phases of its components.A while ago I had two sig gens, a HP 8640B and 3325A, set up next to an XY monitor. It's great fun producing very complex patterns with various forms of modulations of the generators. I have another 3325A, but broken. When I get a round tuit, it would be fun to lock the two 3325s together and make some more patterns. But that video blows away such simple play.Quote from: GeoffS on January 29, 2014, 11:23:43 amYou know, some people would have continued that sentence a few more words, like "because of ...."

author: GeoffS
author_rank: Unknown
timestamp: January 30, 2014, 05:23:39 am
content: Quote from: TerraHertz on January 30, 2014, 05:20:26 amIt was merely to let people know not to expect an answer from the OP.It's the third time this particular person has been banned. They must really like it here.
Assembling Transistor Radios 1955  - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: January 29, 2014, 02:04:20 pm
content: Pretty cool. Love the old stuff

author: dexters_lab
author_rank: Unknown
timestamp: January 29, 2014, 11:02:41 pm
content: lol, love the soldering techniques!

author: free_electron
author_rank: Super Contributor
timestamp: January 29, 2014, 11:52:46 pm
content: OMG ! no fume extraction , no safety glasses, no splashguard or thermal insulating gloves on the solder pot.and they never heard about antistatic wriststraps either !Surely all these people died horrible deaths from flux vapors, flux solvets, and lead poisoning and all of those radio's died a horrible death due to static electricity damage !

author: Phaedrus
author_rank: Frequent Contributor
timestamp: January 30, 2014, 12:00:01 am
content: Quote from: free_electron on January 29, 2014, 11:52:46 pmNah, they all died of lung cancer from smoking a pack a day since they were eight years old.

author: tom66
author_rank: Super Contributor
timestamp: January 30, 2014, 12:10:21 am
content: Is it me, or is there no legend on that board? Is the hand assembly done entirely by rote?

author: free_electron
author_rank: Super Contributor
timestamp: January 30, 2014, 12:12:38 am
content: Quote from: Phaedrus on January 30, 2014, 12:00:01 amthat and eating two eggs and charred slices of fatty bacon every morning. surely gave em gut cancers

author: xrunner
author_rank: Super Contributor
timestamp: January 30, 2014, 12:14:37 am
content: It 's amazing the industry that they talk about in the video, being built-up from this radio/TV technology. All the parts made in the USA. It was for years, but it's all gone now.

author: Macbeth
author_rank: Super Contributor
timestamp: January 30, 2014, 12:17:29 am
content: Quote from: free_electron on January 29, 2014, 11:52:46 pmActually, the assembly appears to all be done by the women. The QA testing by the men. I found this entrenched corporate sexism even back in 1990 when I tried applying for a summer job at Plessey Crypto (MOD contractor) - just soldering boards. I was 'over qualified' and male - I would distract the girls apparently. The interviewer strongly advised me to do a HND and sign up with the RAF for a real engineers career like he did. Sorry, but I was skint and starving and the assemblers wage was triple what I could get if I was lucky enough to bag a real "market" job which did not exist at the time in the UK for a 19 year old in college.Of course we know from stats that women outlive men by around a decade, even when exposed to the evils of non-RoHC.Mind you, theRadium Girlscertainly didn't fare so well!
[deleted] - Page 1
Forum section: electronics / general

author: dtfi
author_rank: Newbie
timestamp: January 29, 2014, 03:53:20 am
content: Relocating thread to another area.

author: nctnico
author_rank: Super Contributor
timestamp: January 29, 2014, 07:32:46 am
content: This topic is better placed in the 'test equipment' section.Anyway, When buying a Tektronix I recommend a TLA700 mainframe because you can change modules later on. When buying new be prepared to spend lots of cash on high sampling rates and long memory.
sub-$90 Android Smartwatch by Shenzhen Zhengfang - Page 1
Forum section: electronics / general

author: Legit-Design
author_rank: Frequent Contributor
timestamp: January 28, 2014, 07:25:30 am
content: http://armdevices.net/2014/01/27/sub-90-android-smartwatch-by-shenzhen-zhengfang/600mAh battery, uses a single-core MediaTek processor (not sure which one), price is below $90 depeding on the bulk purchase quantity, they have 200 people in their Shenzhen factory."It's not dual core, but you can put tf card inside to enlarge the memory"Cellphone watch 3G (sim card inside)Waterproof3 days standby battery lifemost important spec less than 90 USD in quantities for 100pcs, apparently it's reference price? I guess that means retailers can sell it for 90$?When some manufacturers put out smart watches to only extend the functionality of smartphones, shouldn't fully featured smart watches be extended with some kind of tablet device to have bigger screen?

author: amyk
author_rank: Super Contributor
timestamp: January 28, 2014, 11:51:53 am
content: Reminds me ofa certainscammy crowdfunding project... but this one looks like it actually exists!

author: Legit-Design
author_rank: Frequent Contributor
timestamp: January 28, 2014, 02:01:50 pm
content: WP320Last time I saw watch that ugly was when I was still in elementary school.http://zhengfangsz.en.alibaba.com/Product info on their homepage:http://www.zhengfangsz.com/products-detail.php?ProId=112But they don't mention anything about android and those icons/menu don't look too much like android. I wonder if their specs are correct?Also android device should have wifi?Their other smart watches look more like legit android device should look.http://zhengfangsz.manufacturer.globalsources.com/si/6008847788984/pdtl/Fashion-watch/1078811637/Watch.htmhttp://www.globalsources.com/gsol/I/Watch-phone/p/sm/1079559436.htm#1079559436Bluetooth Version3.0Stand-by time: up to 150 hoursTalk time: up to 3 hoursCharger: USB/travel chargerNet weight: 58.0gFeatures:Connects your smartphone to the SmartWatch to play, skip and fast forward all your musicBluetooth 3.0 for crisp and clear wireless connectionIncludes USB cable for convenient chargingStep calculate/pedometer, altitude, temperature display and sports watchWhy does every smartwatch have to look like a scam?

author: echen1024
author_rank: Super Contributor
timestamp: January 28, 2014, 08:39:52 pm
content: Quote from: Legit-Design on January 28, 2014, 02:01:50 pmExactly what I need to do! Why not delete it as well.
VFD tube uses - Page 1
Forum section: electronics / general

author: IO390
author_rank: Regular Contributor
timestamp: January 28, 2014, 02:04:52 pm
content: Took a couple IV-3 tubes into college yesterday, here's what happened...

author: Fabiusp98
author_rank: Contributor
timestamp: January 28, 2014, 03:34:09 pm
content: Very funnyThe first seems Marge Simpsons.
Jim Williams books? - Page 1
Forum section: electronics / general

author: ivaylo
author_rank: Frequent Contributor
timestamp: February 05, 2014, 09:27:06 am
content: Are those any good? Ignore for a minute that the later ones they published with Dobkin are mostly app notes which you can download anyways. I do find his application notes educational and like his writing style but haven't seen anyone recommend the books particularly. This is what Amazon shows:http://www.amazon.com/Jim-Williams/e/B005UZGLWG/ref=ntt_athr_dp_pel_pop_2http://www.amazon.com/Analog-Circuit-Design-Immersion-Black/dp/0123978882/ref=sr_1_1?s=books&ie=UTF8&qid=1355267411&sr=1-1&keywords=analog+circuit+design+volume+2Thanks...

author: jeroen74
author_rank: Frequent Contributor
timestamp: February 06, 2014, 09:47:19 am
content: Wondered about that too a couple of days agoI have a books or two by Jack Ganssle, and I remember one of them was basically all his online articles on paper.

author: luky315
author_rank: Regular Contributor
timestamp: February 06, 2014, 02:53:35 pm
content: It's really "just" a compilation of his great Appnotes with a few content form other peoople.http://www.linear.com/doclist/?tt=&ci=&dt=2&au=Jim+Williams&pn=&fd=&td=

author: leppie
author_rank: Frequent Contributor
timestamp: February 07, 2014, 09:32:18 am
content: Perhaps this blog will helphttp://readingjimwilliams.blogspot.com/
Funny banner ad - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: January 25, 2014, 05:04:22 pm
content: Just clicked my bookmark for this forum and there it was: a funny banner ad from TI (in German):CSD18537NKCSVDS 60VVGS 20VIDMAX 91ARDSON max. 19.2 Megohm at VGS=4.5VWould you buy that MOSFET?

author: Kaptein QK
author_rank: Regular Contributor
timestamp: January 26, 2014, 03:20:51 pm
content: I'll think I pass that one!
Weird weather - Page 1
Forum section: electronics / general

author: M0BSW
author_rank: Frequent Contributor
timestamp: January 25, 2014, 03:45:50 pm
content: It'16:42 here in Peterborough UK, as I type this it's Raining ,also hale stones, and it's thundering & lightening, so much so I've disconnected all my ham radio antenna's, I have never experienced this in all my 59.5 years, weird weather for January.

author: SeanB
author_rank: Super Contributor
timestamp: January 25, 2014, 03:59:07 pm
content: Well here it is hot as usual in January. Humid as usual and going to rain again as usual in January. Must admit Spring was mild, it really only got hot mid December. Likely to be really hot, humid and with a lot of rain, again as usual for Durban, slightly more rain but within the annual variations for the area, for at least the remainder of Summer and Autumn probably peaking around March.Only difference is that this Christmas day and New year's day it did not rain like it did for the last year or so.Rain, thunder and lightning but hail is not too common right here at the coast. Was a few minutes of hail in December in the one afternoon. I remember in around 1995? there was a massive hailfall one afternoon, leaving around 10cm of up to golf ball hail around. That melted in about 2 hours. 1990 there was heavy snow in the Midlands that had a single patch that was there in a shaded dip the whole summer, visible from the freeway.

author: M0BSW
author_rank: Frequent Contributor
timestamp: January 25, 2014, 04:03:45 pm
content: Quote from: SeanB on January 25, 2014, 03:59:07 pmCertainly strange Sean, this is so weird, because it's our winter, it's usually freezing with snow and ice

author: Kibi
author_rank: Unknown
timestamp: January 25, 2014, 04:32:10 pm
content: Last night I travelled from London up to Manchester. It was raining hard the whole way up the M40. M42 was a little lighter. M6 toll road was heavy rain, but easier driving due to the road's quiet nature. M6 proper was horrible, I could not see the road markings because it was raining so hard.Today in Manchester the weather is just exemplifies utter misery and crushed ambitions (not that it's Manchester's fault, I like Manchester).

author: G7PSK
author_rank: Super Contributor
timestamp: January 25, 2014, 04:32:10 pm
content: It hit here just after I read your post at 16;15 power surge crashed the computer so only just now turned it back on at 16;27 About blown itself out now. And the emoticons are bust again in both Chrome and Chromium in linux, only seem to work in windows which I don't want to go back to.

author: mrflibble
author_rank: Super Contributor
timestamp: January 25, 2014, 04:35:26 pm
content: Welcome to humanity (and the 3 second memory that goes with that), an ever changing planet, and statistics!
Need a Russian speacker to translate a you tube hack video - Page 1
Forum section: electronics / general

author: Zucca
author_rank: Unknown
timestamp: January 27, 2014, 05:08:27 am
content: Hi Russian guys,If you have 5 minutes time, can you translate this for me?Makita DC10WB110v - 220vI need to know how he did the hack.Thanks a lot!

author: fluxcapacitor
author_rank: Frequent Contributor
timestamp: January 27, 2014, 05:19:08 am
content: you might find this interestinghttp://www.schneordesign.com/Avi/Makita/makita_mod1.htm

author: Legit-Design
author_rank: Frequent Contributor
timestamp: January 27, 2014, 05:19:37 am
content: Why didn't you read and click on the description link,Remaking the charger at 220 volts(Instructions how to translate those russian subtitles to english: Press CC button, press russian, choose translate captions, choose english, done)it has russian subtitles AND he shows how to hack it. AND youtube can translate the russian subtitles to english.Even if I didn't know russian and this didn't have any subtitles it would be relatively easy to do the hack.Basically change resistor to match your input voltage, the charger already has this built in because they change few components for different markets. Change capacitors to match 400V which is typical for 230V operated switch mode power supplies, check to see if protection components can withstand the higher voltage. You could probably take old working computer power supply apart and get the necessary parts from there.Remember safetyif the device has been switched on recently, 200V or 400V capacitors can hold lethal charges so be sure to discharge them and short them to make sure. Even if it's not lethal don't touch them anyways.

author: nowlan
author_rank: Frequent Contributor
timestamp: January 27, 2014, 05:49:41 am
content: wooh.Just notice someone selling a bosch 10.8v charger conversion kit on ebay.linkI got scared off when i noticed all the caps were 110v rated on my US charger.

author: Zucca
author_rank: Unknown
timestamp: January 27, 2014, 03:40:24 pm
content: Quote from: Legit-Design on January 27, 2014, 05:19:37 amYou are 100% right sorry. I will link your reply in my main 220-110 VAC hack guide here:https://www.eevblog.com/forum/projects/hack-to-convert-fromto-110v-tofrom-220v-main-voltage-basics-guide-examples/

author: Zucca
author_rank: Unknown
timestamp: January 27, 2014, 03:50:58 pm
content: Quote from: nowlan on January 27, 2014, 05:49:41 amThanks I will also link your post in my guide.

author: bridgerectifier
author_rank: Contributor
timestamp: January 28, 2014, 05:17:25 am
content: Ah, was going to put my sister and her husband on the case; they both live in Moscow and speak Russian, he is a fluent speaker, and they just so happen to be staying with me, right now.Glad you sorted it
STS-51L Image Analysis Team Report Space Shuttle Challenger - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 25, 2014, 02:11:01 am
content: I had not seen these videos before.NASA Image Analysis Team report on the Challenger accident.Interesting to see it broken down to milliseconds.Not forgetting the seven lives lost.Francis R. Scobee, CommanderMichael J. Smith, PilotRonald McNair, Mission SpecialistEllison Onizuka, Mission SpecialistJudith Resnik, Mission SpecialistGreg Jarvis, Payload SpecialistChrista McAuliffe, Payload SpecialistPart 1:Part 2KT
It's Australia, not Austria. - Page 1
Forum section: electronics / general

author: iloveelectronics
author_rank: Frequent Contributor
timestamp: January 24, 2014, 07:39:17 am
content: Too funny. Had to share:http://www.quickmeme.com/p/3vrw3rThe topic title may not make sense until you read till the very end

author: GeoffS
author_rank: Unknown
timestamp: January 24, 2014, 07:50:29 am
content: More email exchanges from the same guy (David Thorne) can be found here:http://www.27bslash6.com/Make sure you're not drinking coffee while you read these otherwise your monitor will need a cleanMissing Missy is my favourite.

author: casper.bang
author_rank: Frequent Contributor
timestamp: January 24, 2014, 10:19:23 pm
content: Charming Fella, very dark sense of humour.
Transmission properties of isotropic martial units - Page 1
Forum section: electronics / general

author: Phaedrus
author_rank: Frequent Contributor
timestamp: January 23, 2014, 04:15:36 pm
content: I'm seeing some distortion towards the end there, but in general I think Wavy Seals demonstrate overall decent signal transmission characteristics and show promise for use as communication in rough terrain, and could serve as a useful function for individuals who wish to extend their service period.

author: Po6ept
author_rank: Regular Contributor
timestamp: January 23, 2014, 05:45:28 pm
content: I am concerned about the potential for dropped bits. How do they implement FEC?

author: Phaedrus
author_rank: Frequent Contributor
timestamp: January 23, 2014, 11:39:20 pm
content: Mostly by punching anyone who screws up the timing, I'd imagine.

author: GeoffS
author_rank: Unknown
timestamp: January 23, 2014, 11:41:42 pm
content: Quote from: Phaedrus on January 23, 2014, 11:39:20 pmOr promoting them.

author: SArepairman
author_rank: Frequent Contributor
timestamp: January 24, 2014, 02:41:27 pm
content: are those navy seals?

author: nitro2k01
author_rank: Frequent Contributor
timestamp: January 24, 2014, 03:32:11 pm
content: Perfect impedance matching. Well done.I wonder how this works for smaller wavelengths. Do bullets ("gunons") have a wave-particle duality?

author: Phaedrus
author_rank: Frequent Contributor
timestamp: January 24, 2014, 05:13:49 pm
content: Quote from: SArepairman on January 24, 2014, 02:41:27 pmWavy Seals.(yes)

author: dfmischler
author_rank: Frequent Contributor
timestamp: January 24, 2014, 10:12:42 pm
content: Now we need an RFC for Transmission of IP Datagrams on Isotropic Martial Units. Do you think there will ever be afield test(like there was forRFC 1149 Standard for the Transmission of IP Datagrams on Avian Carriers).
Bulk questions - Page 1
Forum section: electronics / general

author: apelly
author_rank: Unknown
timestamp: January 24, 2014, 12:26:23 pm
content: I lurk a lot, and I read a lot.I have aboat loadof questions. Most of them on topic, but some of them are exploratory because I know some of you have relevant experience and I'd rather be sent in the right direction by a community I trust than waste a bunch of time with strangers.Please bear this in mind if you see me start a few threads at a time. I will ask in the correct sub-forum.
Ohmmmmm - Page 1
Forum section: electronics / general

author: c4757p
author_rank: Super Contributor
timestamp: January 27, 2014, 04:09:34 am
content: The color stripes are even right

author: dfmischler
author_rank: Frequent Contributor
timestamp: January 27, 2014, 04:07:38 pm
content: Quote from: c4757p on January 27, 2014, 04:09:34 amOf course they are. Otherwise they would have to chant "Ohmmmms".

author: smashedProton
author_rank: Frequent Contributor
timestamp: January 27, 2014, 06:03:08 pm
content: 10th repost of this that i have seen.......
Dos Equis on amplifiers - Page 1
Forum section: electronics / general

author: tekfan
author_rank: Frequent Contributor
timestamp: September 05, 2011, 10:34:59 pm
content: At first I thought it was Bob Widlar.

author: Barbara Wohl
author_rank: Newbie
timestamp: January 23, 2014, 07:15:42 pm
content: You can tell this isn't Bob Widlar. Bob drank Bohemia, not Dos Equis.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 23, 2014, 07:55:17 pm
content: Very true, and vice versa

author: c4757p
author_rank: Super Contributor
timestamp: January 23, 2014, 07:57:40 pm
content: It's the bane of anyone whodoesn'twant to build an oscillator, isn't it? That an oscillator and an amplifier are almost precisely the same thing, except 180 degree phase shift is good in one case and bad in another...

author: N2IXK
author_rank: Frequent Contributor
timestamp: January 23, 2014, 11:08:01 pm
content: Quote from: Barbara Wohl on January 23, 2014, 07:15:42 pmFrom the stories I have read, Widlar would drink just about anything, and in amazing amounts...
ADS1102CAL+ trouble - Page 1
Forum section: electronics / general

author: gafbich
author_rank: Contributor
timestamp: January 23, 2014, 05:36:13 pm
content: Good day, I bought an oscilloscope ADS1102CAL +, but there are doubts that are Genuine model, because the interface is not like other oscilloscopes Athenaeum. No RS232. Russian interface no. Official firmware is not suitable for my model. when rented waveform and store in memory, the picture falls apart when the vertical retrace. I put pictures.Bought from this seller.http://www.ebay.com/itm/221255186471?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2648Sorry for my English, use a translatorhttp://youtu.be/lUCdPlWBihIhttp://i.ebayimg.com/00/s/NzY4WDEyODA=/z/yDwAAMXQVERS4TL7/$_57.JPG?set_id=2
WHY are you locking (AND deleting) innocent threads, admin? - Page 1
Forum section: electronics / general

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 22, 2014, 09:56:05 pm
content: Okay, IF you see this THIRD attempt to keep this thread alive, you'll know that this is a THIRD copy, and some "admin" is wandering around trying to "clean up" the forum, (although equally irrelevant threads such as "The lame joke thread" are allowed to remain.Something isn't fair here - why are my threads being locked AND deleted? Someone has an agenda or a grudge, but why, escapes me :-/

author: GeoffS
author_rank: Unknown
timestamp: January 22, 2014, 10:00:36 pm
content: It's a moderators job to try and keep things on track. Perhaps the solution is to post on topic which, in case you've forgotten, is electronics.Dave allows a lot of leeway as to what is or isn't relevant and on occasions has reversed moderators decisions.In this instance, I'm sure he'll agree.

author: zapta
author_rank: Super Contributor
timestamp: January 22, 2014, 10:42:16 pm
content: Aren't you interesting in discussion and feedback from your users?https://www.eevblog.com/forum/chat/why-are-you-locking-(and-deleting)-innocent-threads-admin/msg373450/#msg373450Discussing moderation policies looks like a legit meta topic to me and blocking it seems defensive.

author: GeoffS
author_rank: Unknown
timestamp: January 22, 2014, 10:54:04 pm
content: While I'm sure Dave appreciates feedback about the forum, complaining about locked threads by creating yet another thread about it., is (in my opinion) not the way to do it.Perhaps Dave can start a new thread on the subject?Remember the 'Report to Moderator' button sends a message to ALL moderators and admins (this includes Dave) so use it whenever you want to bring something like this to his attention.
Polish scientists constructed breathing biobatteries - Page 1
Forum section: electronics / general

author: CJWarlock
author_rank: Contributor
timestamp: January 23, 2014, 03:25:33 am
content: It may be a bit old "news" but I didn't find it anywhere on the forum and I thought it may be interesting for those interested in medical electronics aswell as in new battery technologies. I've also read recently about another project where the use of sugar in role of energy source is considered but that's another story. Bigger picture attached in this post. I've replaced Polish characters in the scientists' names with the corresponding latin characters because I've noticed this forum doesn't support such chars.Quote

author: BravoV
author_rank: Super Contributor
timestamp: January 23, 2014, 03:32:24 am
content: Quote from: CJWarlock on January 23, 2014, 03:25:33 amReminds me of this ...... still don't get it ? How bout this ... the crop ...

author: amyk
author_rank: Super Contributor
timestamp: January 23, 2014, 09:51:21 am
content: I guess "Polish scientists improve the zinc-air battery" wasn't quite catchy enough?

author: Greg Robinson
author_rank: Regular Contributor
timestamp: January 23, 2014, 10:01:43 am
content: What do we need this for? We should just keep using plutonium batteries in pacemakersWiki

author: dr.diesel
author_rank: Super Contributor
timestamp: January 23, 2014, 10:11:48 am
content: Quote from: amyk on January 23, 2014, 09:51:21 amlol, that reminds me of these, Radio Shack used to have buckets of them in piles:
MOVED: Cheap Virtex 5 FPGA Board (actually PrimeSense DevKit better known as Kinect) - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: January 23, 2014, 05:23:12 pm
content: This topic has been moved toMicrocontrollers & FPGA's.https://www.eevblog.com/forum/index.php?topic=13320.0
IS it? - Page 1
Forum section: electronics / general

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 22, 2014, 09:18:58 pm
content: Let's see who works this out first, and properly describes what is happening here:"This sentence is false"So, is the sentence false, or true? I already know the correct answer - I'm askingyouPS: Don't "Google it" for goodness sake, use your brains

author: grumpydoc
author_rank: Super Contributor
timestamp: January 22, 2014, 09:30:47 pm
content: It's a quantum sentence - simultaneously true and false.

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 22, 2014, 09:32:57 pm
content: Quote from: grumpydoc on January 22, 2014, 09:30:47 pmHow can it be false? It'sstatingit is false, which would make it true.

author: mrflibble
author_rank: Super Contributor
timestamp: January 22, 2014, 09:39:49 pm
content: Quote from: rolandpenplotter on January 22, 2014, 09:18:58 pmDepends. Don't need google to see it depends 100% on what flavor eval() you use. The end. Neeeext. Do you lex it and then parse it, or parse it and then lex it. Or my personal favorite for this kind of conundrum, lazy evaluation. As in: don't give a shit, drop on floor. Frees up lots resources to be used on other things.Or are you of the ilk thatliketheir information sources untestable?This sentence does not exist.or does it...This sentence is. Yup.This.Well, this was fun.
EE Workplace Humor - Page 1
Forum section: electronics / general

author: dfmischler
author_rank: Frequent Contributor
timestamp: January 22, 2014, 03:18:38 pm
content: Can you find/tell other jokes by/for EE? How aboutthisone?

author: GreyWoolfe
author_rank: Unknown
timestamp: January 22, 2014, 03:23:07 pm
content: That would be my EX-girlfriend. A little harmless bondage fun is fine if you are into that. Jeopardizing gainful employment is something else.

author: c4757p
author_rank: Super Contributor
timestamp: January 22, 2014, 03:29:53 pm
content: OK... that made my morning.

author: Falcon69
author_rank: Super Contributor
timestamp: January 22, 2014, 04:29:18 pm
content: lol
Advice on Mounting 480 SMD LEDs - Page 1
Forum section: electronics / general

author: PICmonster
author_rank: Regular Contributor
timestamp: January 20, 2014, 03:25:46 pm
content: I am looking for advice on cost for mounting 480 white LEDs (PLCC2) for a project I started about a year ago, it has been a nightmare trying to solder these on manually and it quickly because a chore rather that an enjoyable task, hindsight is a wonderful thing and I would have done things differently if I was to re-spin the PCB now, I would use conventional LEDs at least they self-align on the PCB. I thought it would be a good idea to purchase LED strips from China, that way I could get many LEDs for a cheap outlay, far cheaper than buying a tape and reel of LEDs, but this was crazy removing the LEDs and then fitting them to the PCB was not good, indeed allot of the LEDs were faulty due to the heat of removing them.The PCB is double sided, onside has been pupulated with a micro and other circuits, on the same side of the LEDs there is and a graphics LCD fitted, can anyone tell me please what would it cost to populate this PCB with high brightness white PLCC2 480 LEDs?

author: mariush
author_rank: Super Contributor
timestamp: January 20, 2014, 04:29:04 pm
content: Order a steel stencil for that pcb or at least a segment of that pcb (enough for a row of leds, if it's a design that gets repeated several times) and a cheap hot air gun.Put paste on the pads, put leds, use hot air gun to melt the solder. Once you get the hang of it (hot air temperature, distance between hot air gun and pcb etc) it basically takes a few seconds for each led and no led damaged.

author: peter.mitchell
author_rank: Super Contributor
timestamp: January 21, 2014, 06:03:53 pm
content: How many boards are you doing?Less than 5?Deal with it. For this few boards, paste and stencil almost isn't worth it, if you had opted for the cheaper HASL finish you could actually save some time, in the past i have done a little "cheat", for large surface mount components such as these, HASL finish, lightly spray board with AIM WS-730 water based flux, place parts, respray, "reflow" in oven, respray, drag solder all the parts, clean off flux in water. The flux and the HASL finish tack the parts and makes drag soldering a breeze. I used this specific flux because it is water soluale, water based so it doesn't evaporate as quick and will disolve/disperse into the previous fluxing.More than 5?For 480 LEDS+ extras per board, get an assembly house, at unrealistically fast placement speeds (say... 1 every 4 seconds) that is still easily half an hour of just placing LEDS!Tooling, pick and place machine, solder paste stencil, bare boards, BOM. You're looking $200 per board minimum for say... 5 boards.
Super-high speed high current transistor - Page 1
Forum section: electronics / general

author: vtkkorhanjoh
author_rank: Contributor
timestamp: January 22, 2014, 03:54:16 pm
content: I am working on a design which requires a >45amp transistor switch, with a rise time of max 500ps, staying on for a few hundred nanoseconds before turning off equally fast. I have looked at some high speed MOSFETs from microchip, toshiba and a few others, but they all had a turn-on time of above 10 ns. I am right now looking at using a BLF6G22LS-180RN LDMOS transistor from nxp, and it seems pretty good. However, does anyone know of a better transistor to use? This one costs like 100 bucks a piece in digi-key, and I really don't want to pay that kind of prices for a single tranny.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 22, 2014, 04:17:22 pm
content: Just how wide is your transmission line that it has less than one ohm impedance, yet can still be connected to a single transistor?...Is this a laser diode driver?How much does the rise/fall time actually matter? Can another method be used, for example, avalanche transistors, step-recovery diodes, or even a hydrogen thyratron?RF transistors are pretty well not characterized in conventional means (like switching times and DC gain and curves and etc.). To determine suitability, you may have to buy a lot of types and test each in your application. You also need a good enough driver.Tim

author: vtkkorhanjoh
author_rank: Contributor
timestamp: January 22, 2014, 06:28:24 pm
content: Yes, this is a laser diode driver! I am using a pulsed diode laser, and for a ToF range finder even picoseconds matter. The diode itself has a rise time of around 500ps, and I want there to be as little extra turn-on time as possible. I need a resolution of a few cm, so a total measurement jitter must be in the tens of picoseconds. I can compensate for delays in the system, but not for turn-on jitter. So the smaller Ton's, the smaller the maximal error will be.I have thought of using a thyratron, but since this driver is supposed to be highly portable, a ø10cm ceramic tube is way to big, and also, the thyratron would draw several amps constantly, which I do not need in a small, portable, battery powered (possibly head-mount) device.A SRD diode or avalanche diode is something i may very well use to make the driving pulse for the bigger Nd:YAG laser (Yes, it will have two lasers!), but I do not know of any way to quickly and accurately trigger them. As for alvalance transistors, if you can find one that can take 40+ amps, let me know!As for the unknown parameters of the transistor, yeah, it is kind of a shot in the dark. But concidering they are rated for 2-2,4 ghz, they will probably have a pretty great rise time. As for driving, slapping a half-watt RF amplifier IC will probably do the job.

author: Marco
author_rank: Super Contributor
timestamp: January 22, 2014, 07:29:43 pm
content: Why does the pulse have to be so long? Constant fraction discrimination or differentiation + ZCD isn't going to work with a pulse 100s of nanoseconds long.PS. did you readthisyet?
Awesome app-note collection from Analog devices.  - Page 1
Forum section: electronics / general

author: magnus0re
author_rank: Contributor
timestamp: January 20, 2014, 08:02:46 pm
content: Hi. I recently attended analog devices design conference. I traveled from my home in Bergen (60°23' N / 5°19' E) to Stockholm ( 59°16' N / 18°16' E), visited relatives and went to the one-day conference. It was really interesting.To the point : I got a paperback A4 book there, called "Classic Application Notes Collection, Popular Tips and Techniques That Stand the Test of Time"and it was for me, a treasure trove of really nice, high level information. A total of 30 App notes. (11.6 Megabytes)The book is divided in 3 sections:General pcb layout and groundingComponent theory, evaluation and specificationSpecific component type applicationsSo I wanted it in digital format as well, because of portability. So Now I have downloaded all the datasheets in this book, and cleaned them up, and OCR'd with acrobat. (the old ones had skewed pages).Now since these app notes are available to all, and I live in Norway, and therefore a subject to Norwegian law; I will make the dastardly, and probably not correct claim that these app notes are kinda' public domain, except that they haven't been officially released. But anyone can gather them.Then I ask you, the reader, If you want me to share with you the wealth of this knowledge. Should I upload it to somewhere or email it to someone and make it available to you ?P.S Sorry if this sounds as an advertisement for analog devices, it is not my intention.edit. link #1http://www.filedropper.com/classicapplicationnotescollection

author: mtdoc
author_rank: Super Contributor
timestamp: January 20, 2014, 08:22:38 pm
content: Yeah, uploading it to a file sharing site so others can download would be great!

author: magnus0re
author_rank: Contributor
timestamp: January 20, 2014, 08:33:11 pm
content: here is the link. hope it works.http://www.filedropper.com/classicapplicationnotescollection