hybridfree/eevblog-posts huggingface dataset:
Flaky eBay buck converter - Page 1
Forum section: electronics / general

author: netdudeuk
author_rank: Frequent Contributor
timestamp: June 21, 2015, 06:00:52 pm
content: Ok, so I bought one of thesehttp://www.ebay.co.uk/itm/351020297464I wasn't expecting to be able to push it to the specified limits but it didn't even pass any tests.Hooking it up to my DP832 with a multimeter on the board's output, the output voltage always started just below the input voltage and went on to rise to a higher voltage. For example, 15v in produces 16v out. According to the DP832, only 13mA was drawn in this example.Adjusting the pot made no difference at any time.No heat generated at all.I know that this is a cheap board so it's not about the money but I would be interested from a learning perspective if anyone has any ideas about what's been going off with it.Can these and similar boards ever be trusted ?

author: dexters_lab
author_rank: Unknown
timestamp: June 21, 2015, 06:29:29 pm
content: likely just a faulty one. Email the seller they will probably just send you another

author: rolycat
author_rank: Super Contributor
timestamp: June 21, 2015, 06:35:18 pm
content: It's unusual for the output voltage to be higher than the input, but have you readthisthread?You need to turn the trim pot anticlockwisea lot.

author: tom66
author_rank: Super Contributor
timestamp: June 21, 2015, 06:46:52 pm
content: I wouldn't be surprised if the internal switching transistor is shorted.

author: electr_peter
author_rank: Unknown
timestamp: June 21, 2015, 08:42:53 pm
content: Quote from: rolycat on June 21, 2015, 06:35:18 pmTurn the pot (it is misleading at first) and do more tests with various input/output voltages and load currents. There is not much that can fail in listed DC/DC converter.

author: con-f-use
author_rank: Unknown
timestamp: June 21, 2015, 08:57:16 pm
content: The exact same module is sold almost everywhere in china. It functions reasonably well. I'd say, you either have a shorted leg or something is wrong with the trim pot or yours is faulty.

author: netdudeuk
author_rank: Frequent Contributor
timestamp: June 21, 2015, 09:15:34 pm
content: Thanks for the replies including the reference to the previous thread. Rolycat got it right
Tektronics MDO3104 w/ an Electron Microscope - Page 1
Forum section: electronics / general

author: cipher
author_rank: Unknown
timestamp: June 19, 2015, 12:08:15 pm
content: Very cool look at an old LP and other media, such as an capacitance electronic disc, with an electron microscope (I am not the author)...

author: miguelvp
author_rank: Super Contributor
timestamp: June 19, 2015, 12:13:19 pm
content: I've seen that before:https://www.eevblog.com/forum/other-blog-specific/electron-microscope-slow-motion-video-of-vinyl-lp/It's quite alright, it's so awesome that it's hard to not post it without searching first

author: cipher
author_rank: Unknown
timestamp: June 19, 2015, 05:17:41 pm
content: Quote from: miguelvp on June 19, 2015, 12:13:19 pmA search for "microscope" does not show that thread you linked. I have a feeling the new forum "Other Blog Specific" is not linked to this site's search function yet.EDIT: I checked it again just now and it shows up at number 37 on the 2nd page. So it certainly was hard to find on this site.
Nuclear Test: "Operation Upshot-Knothole" 1953 - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: June 19, 2015, 12:47:18 am
content: Part 1Part 2Part 3

author: EEVblog
author_rank: Unknown
timestamp: June 19, 2015, 01:41:24 am
content: The engineering that must have gone into all these tests and developments etc, must have been incredible. The data acquisition systems alone are incredible feats.

author: John Coloccia
author_rank: Super Contributor
timestamp: June 19, 2015, 01:52:56 am
content: One of the best books I've ever read is "Manhattan Project: The Untold Story of the Making of the Atomic Bomb", by Stephane Groueff. I highly recommend picking it up if you can.

author: TimFox
author_rank: Super Contributor
timestamp: June 19, 2015, 01:58:30 pm
content: There is a very interesting nuclear testing museum in Las Vegas, operated by UNLV.Highlights:Lots of propaganda movies. I visited with a Soviet emigre, and asked him if he had ever seen propaganda in his youth.One wall covered with survey meters. Every garage in the Southwest must have made them.A very interesting display of equipment and photos from the underground testing. Heavy-duty mining was required to set up the tests.

author: John Coloccia
author_rank: Super Contributor
timestamp: June 19, 2015, 02:29:13 pm
content: What's amazing is that the K-25 uranium enrichment plant (gaseous diffusion) was literally slapped together as quickly as possible, in about a year and a half, designing and redesigning as they went along...there was a war to win, after all, and we were terrified someone else would get there first. Despite that, the plant ran reliably for over 40 years. I doubt that anyone ever considered that this thing would be capable of running for decades. It was really an engineering masterpiece.
Latest ElectroBoom video: Charge your car battery with AA batteries - Page 1
Forum section: electronics / general

author: FrankenPC
author_rank: Unknown
timestamp: June 23, 2015, 07:02:01 pm
content: This guy is over the top. Love it.https://youtu.be/I0utNemFsl8

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 24, 2015, 04:02:36 am
content: Who else expected the "tossed aside" batteries to short and smoke, only to find that they didn't?

author: German_EE
author_rank: Super Contributor
timestamp: June 24, 2015, 06:33:14 am
content: Interesting. The charge from the AA cells should be enough for one attempt providing your engine is in good condition. The accumulator on our car is only a year old so I can't verify this unless I park all night with the lights on. Would anybody care to try this?

author: wagon
author_rank: Frequent Contributor
timestamp: June 24, 2015, 01:40:42 pm
content: I've started a large six-cylinder petrol engine with a 12V 7Ah SLA. You get only one go before the little alligator clip leads melt.
Any EEVBloggers Going to Friedrichshafen? - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: June 17, 2015, 08:47:21 pm
content: Meet you at the Hilberling stand at 3pm on the Saturday. I'll be the guy in shorts and a green t-shirt carrying a black backpack.

author: 128er
author_rank: Regular Contributor
timestamp: June 17, 2015, 10:22:15 pm
content: Sorry, I don't want to hijack this thread. But I was curious and looked for Hilberling on the web.I'm stunned.That looks like a company with a real passion for their field. You can actually see what they are doing, not one of this meaningless shiny webpages full of PR nonsense-phrases.Great. If you work for them, you have to be a lucky guy.

author: John Coloccia
author_rank: Super Contributor
timestamp: June 17, 2015, 10:25:22 pm
content: Funny...I was just starting to study to get my ham license here. Literally, in the last day or two.

author: Galenbo
author_rank: Super Contributor
timestamp: June 18, 2015, 06:42:55 am
content: Maybe I'll go to have a look at the chicks.

author: Richard Head
author_rank: Frequent Contributor
timestamp: June 18, 2015, 06:49:01 am
content: Maybe I'll go to have a look at the chicks.Unless you're gay and into old men I think you'll be disappointed!

author: Richard Head
author_rank: Frequent Contributor
timestamp: June 18, 2015, 06:51:09 am
content: GalenboMy fingers were faster tham my brain. Only when I looked at the picture for a while did I fully understand your comment!Ha ha.

author: German_EE
author_rank: Super Contributor
timestamp: June 18, 2015, 07:21:48 pm
content: "Great. If you work for them, you have to be a lucky guy."I wish!!!The company makes various products mostly based around RF Engineering or power supplies but the man in charge, Dr Hilberling, used both his own money and the company's money to build the best transceiver that technology will allow. The result is a unit called the PT-8000 which sells for over 18 000 Euro which, unfortunately, is outside the financial abilities of most radio hams.I shall therefore wait for my lottery numbers to line up.

author: babysitter
author_rank: Frequent Contributor
timestamp: June 19, 2015, 05:42:15 am
content: There are chicks available there. Married one of them.

author: Psi
author_rank: Super Contributor
timestamp: June 19, 2015, 06:23:19 am
content: An image search for Hilberling found thisGear probably worth more than the house

author: EEVblog
author_rank: Unknown
timestamp: June 19, 2015, 06:51:56 am
content: Quote from: Galenbo on June 18, 2015, 06:42:55 amI think I see maybe two there!

author: 128er
author_rank: Regular Contributor
timestamp: June 19, 2015, 06:58:25 am
content: Best pictures under "Development" and "Ham Radio" (Even if you are not a ham):http://hilberling.de/en/en_son/index_en.htm
The non-linear history of radio - Page 1
Forum section: electronics / general

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: June 16, 2015, 02:19:32 am
content: The thread about carbon mic amp made me think of this:www-smirc.stanford.edu/papers/chapter1.pdfIt's a good read.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 16, 2015, 04:14:14 am
content: Possibly of interest:https://books.google.com/books?id=RdQ1AQAAMAAJ&pg=PA449&lpg=PA449&dq=leonard+fuller+design+arc+converters+radio+telegraphy&source=bl&ots=RA3esxr7s3&sig=ZJR5FUj1nGPjto2GW3BFAH7EsKo&hl=en&sa=X&ved=0CCcQ6AEwA2oVChMI6dOUt6uTxgIVkZiICh03eww1#v=onepage&q=leonard%20fuller%20design%20arc%20converters%20radio%20telegraphy&f=falseThis being the reference on page 7, Fuller's thesis on high power arc generators.Tim

author: Zero999
author_rank: Super Contributor
timestamp: June 16, 2015, 08:23:16 am
content: It's disappointing there was no mention of mention of Jagadis Chandra Bose's experiments with 60GHz microwaves back in the 1890s.https://www.cv.nrao.edu/~demerson/bose/bose.html

author: TimFox
author_rank: Super Contributor
timestamp: June 16, 2015, 01:00:26 pm
content: An interesting device, mentioned on pp. 6 and 7 of the T H Lee book, is the "Poulsen arc", later called the "Federal arc", as a negative-resistance CW generator. Federal Radio (later ITT) purchased the invention from the Danish inventor and improved it. A large magnet was needed to stabilize the arc; since it needed to conduct continuously, Morse code was sent by frequency-shift keying (a large relay added capacitance to the tank to shift the resonant frequency). Although superseded by vacuum tubes, the Federal arc lived on, when Lawrence's group at Berkeley found an armature from a scrapped Federal arc at a junkyard in Palo Alto and used it to generate the magnetic field for their first cyclotron.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: June 16, 2015, 10:42:13 pm
content: Quote from: Hero999 on June 16, 2015, 08:23:16 amThere's a reason why I have a favorite century and a favorite decade.
another scam? - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: June 11, 2015, 11:10:13 am
content: http://www.ebay.com/itm/191597733466?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

author: matseng
author_rank: Frequent Contributor
timestamp: June 11, 2015, 11:35:09 am
content: Probably. I just tried to purchase one but got this message:Buy It NowTransaction BlockedWe're sorry, but the seller of this item is unable to receive funds at this time.<Go To Item Details

author: John Coloccia
author_rank: Super Contributor
timestamp: June 11, 2015, 12:04:23 pm
content: PLEASE someone figure out how to buy one of these things and send it to Dave!

author: wraper
author_rank: Unknown
timestamp: June 11, 2015, 12:06:09 pm
content: likely just hacked ebay account.

author: EEVblog
author_rank: Unknown
timestamp: June 11, 2015, 01:13:59 pm
content: Quote from: John Coloccia on June 11, 2015, 12:04:23 pmI have therealGoPro ripoff SJ4000, not the rip-off of the rip-off!

author: John Coloccia
author_rank: Super Contributor
timestamp: June 11, 2015, 01:17:51 pm
content: I thought it might make a fun tear down to see just how much garbage they can pack into what looks like a cheap, cardboard box.I didn't know anyone was actually making a decent GoPro knockoff. Lord, I'm happy I'm not into photography. I have friends that have gone down the rabbit hole with photography equipment. I'm sure you know how expensive good glass is.

author: amyk
author_rank: Super Contributor
timestamp: June 11, 2015, 02:02:29 pm
content: Does it really have WiFi?What amuses me more is that it apparently uses "miaco SD" and has a "Swilch".

author: sony mavica
author_rank: Frequent Contributor
timestamp: June 16, 2015, 10:36:21 am
content: http://www.ebay.com/sch/chsdashenggong/m.html?_nkw=&_armrs=1&_ipg=&_from=
Long(-ish) term experiences with Shopify stuff? - Page 1
Forum section: electronics / general

author: Asmyldof
author_rank: Regular Contributor
timestamp: June 15, 2015, 05:10:05 pm
content: I see that Dave uses Shopify and I have wondered about them before, so I thought maybe a couple of people could chime in here specifically about their website used for EE-stuff and/or the buy-button option, before I dive into that rabbit hole and find myself surprised, whether positively or negatively.I had pondered about building it up myself with WP only, but I'm now thinking maybe the buy-button wouldn't be a bad idea, just to handle the finances and all. Any other input and/or options welcome too. Such as good systems for selling electronics supplies with searchable and comparable specs, like diameter, capacity, etc etc. Preferred is something safe at a low-ish monthly fee, or a reasonable one-time purchase, or if the world has suddenly aligned free/donation would be awesome (but secure!).---(relatively irrelevant, very skip-able back-story)I have been Seriously procrastinating about re-building my personal Webshop, but now that Dave told me in the Mailbag that he thinks I should deffo try and sell some of the heatshrink, I find myself a bit more motivated to at least make a digi-leaflet, get some stickers printed, think of an acceptable pricing as per quality range, etc.But, the reason the shop "died" is repeated hack attempts to the "mainstream" (at least then and over here) software package I used to set it up, called PrestaShop, and the resulting double to triple work to keep it up, add new pictures, tag stuff, etc.I currently occasionally have very busy weeks, especially when I'm motivated and bouncy and could happily do 20 hours of work a day. Which is Spring ~ Fall. Which is now.So while I'd happily invest 30 minutes to 4 hours a day, on average 6 days a week, handling the results of an on-line shop, the previous experiences have left me hesitant for fear of spending that time hassling through adding stuff and on up-keep rather than 1 ~ 3 customers (my expected reach at the moment), which will make it die again.I'd basically like to devote my time to customers in stead of click-drag-click-type-type-type-click-drag-click. Next item. click...etc. Hack attempt, database messed up, back-up system broken, reinstall, etc...
Thanks Dave, Maxarcade helped me fix first junk LCD TV. - Page 1
Forum section: electronics / general

author: electronics-whiz
author_rank: Regular Contributor
timestamp: June 18, 2015, 02:00:01 am
content: I was going down the road saw an LCD TV sitting on the curb. Was like probably died because of junk caps, maybe I can fix.I saw dave work on a plasma once, and Maxarcade on youtube does all kinds of this stuff. I saw similar issue with dell monitor also. PCU filter caps on output failed. At the time I thought it's a dumb filter cap who needs it it's still rectified by diodes. Dave had talked about that one episode that and seeing before I knew filter caps could be the issue. They had one cap like right against a heatsink I was like really Samsung I expected better from you.Caps were the notorious Sanwha brand (heard lot about them, never seen) most common junk cap brand I have seen is Samxon. I swapped out tha caps, made some jumper wires to move the one cap away from the heatsink. Near as I can tell works near perfectly. If mute it though and stand by it you can hear the backlight inverter hum not seen that issue before.Has sort of odd backlight setup main HV transformer on the PSU board that connects to another board with it's own plastic cover that has like 12 mini transformers, some transistors, and a connection for some sort of control signal.
OT the supercar event June 20-21 2015 South East England  - Page 1
Forum section: electronics / general

author: KJDS
author_rank: Super Contributor
timestamp: June 14, 2015, 05:02:37 pm
content: It's somewhat off topic, but there will be a great range of supercars to have a ride in, possibly even a Tesla, just to add some electric content.Fancy being driven round the Dunsfold Park track (where they film Top Gear, or at least used to until Jezza got a bit carried away) in a supercar?http://www.thesupercarevent.com/

author: calexanian
author_rank: Super Contributor
timestamp: June 14, 2015, 08:44:26 pm
content: Think of me burning to death in 105 degree Fresno heat while you are turning donuts in a Lamborghini or something else awesome please.,
Arduino error 'else' without a previous 'if' - Page 1
Forum section: electronics / general

author: davidmomi
author_rank: Newbie
timestamp: June 14, 2015, 04:43:51 pm
content: #include <Servo.h>#include <tubot_motor.h>int pinmotorIzda = 9;int pinmotorDcha = 10;int pinButton = 4;int Button;MoverRobot tubot;void setup(){tubot.begin(pinmotorIzda , pinmotorDcha,1268 ,1278);pinMode(pinButton, INPUT);}void loop(){Button = digitalRead(pinButton);if(Button==0)tubot.recto(50); // Mover robot hacia delantedelay(5000); // Durante 5selsetubot.recto(-50);delay(5000);}I do that, but it says me that there's an else without a previous if

author: DJohn
author_rank: Regular Contributor
timestamp: June 14, 2015, 04:46:49 pm
content: The if only covers the next statement, so you've actually writtenCode:if(Button==0)tubot.recto(50); // Mover robot hacia delantedelay(5000); // Durante 5selsetubot.recto(-50);delay(5000);which doesn't make sense. You need braces around the two blocks:Code:if(Button==0){tubot.recto(50); // Mover robot hacia delantedelay(5000); // Durante 5s}else{tubot.recto(-50);delay(5000);}

author: IanB
author_rank: Super Contributor
timestamp: June 14, 2015, 04:49:59 pm
content: There are very few programming languages which "do what you mean" rather than "doing what you say". C isn't one of them

author: con-f-use
author_rank: Unknown
timestamp: June 14, 2015, 07:01:49 pm
content: What John said.Or in other words, whenever you use a conditional statement such as `if`, the conditional only apples to the very next block of code. A single statement is also a block and the empty statement `;` is also a statement, i.e. in the codeCode:if( 0 ); do_something(); // mind the empty statementthe call to `do_something()` is always executed because `;` is the very next block after the `if`. Something to watch out for.
I need computer help! - Page 1
Forum section: electronics / general

author: Arlen Moulton2
author_rank: Regular Contributor
timestamp: June 11, 2015, 07:39:37 pm
content: ive got a really old computer that is running windoes xp and i would like to open its second storage hdd to the small network. all of my computers are connected to the internet through this computer. please help!

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 11, 2015, 07:50:11 pm
content: Your question is not very clear, do you want to share the contents of the second hdd with the other computers on your internal network?

author: Galenbo
author_rank: Super Contributor
timestamp: June 11, 2015, 08:02:59 pm
content: There is site, specially made for specifically this question:CLICK HERE

author: Arlen Moulton2
author_rank: Regular Contributor
timestamp: June 12, 2015, 06:03:36 am
content: Yes I do want to access the files on other computers.

author: ranch varment
author_rank: Regular Contributor
timestamp: June 12, 2015, 10:48:32 pm
content: you could upload it, if its media facebook will even do it.

author: Arlen Moulton2
author_rank: Regular Contributor
timestamp: June 14, 2015, 01:29:58 pm
content: dont panic, the problem is solved now
Half finished kit collections - Page 1
Forum section: electronics / general

author: Deathwish
author_rank: Unknown
timestamp: June 16, 2015, 10:51:35 pm
content: Ok I have collected, or I should say purchased a number of items that for one reason or another are half done, what I mean for example is, I purchase a programmer that needs another board to work on the grounds that I got the most expensive item first and the cheapest will be easier to get later if money gets tight kind of thing. My bench has a number of such things on it, how many have you got ?. This does not include D.I.Y projects

author: Deathwish
author_rank: Unknown
timestamp: June 17, 2015, 12:07:21 am
content: That counts. glad i am not alone ..

author: JoeN
author_rank: Frequent Contributor
timestamp: June 17, 2015, 05:02:46 am
content: I used to have a half made Southern Cross computer that sat around half made for about 10 years.Then I finished it.https://www.flickr.com/photos/mrbill/sets/739140/(not my images)The only unfinished kit I have right now is the Adafruit Geiger counter. It's 100% done but isn't working so we will call that less that complete. I am just not sure how to continue. Either that; or my piece of uranium ore is defective.

author: KJDS
author_rank: Super Contributor
timestamp: June 17, 2015, 05:29:09 am
content: I have almost all of a HP 20GHz VNA, just need a working sweep generator to put it all together.
Jack King "The Voice of Apollo" 1931-2015 R.I.P. - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: June 13, 2015, 02:05:24 pm
content: There is a better interview with him but I cant find it right now.[http://www.space.com/29651-jack-king-nasa-voice-apollo-obituary.html
Someone posted this link in another post just below...... - Page 1
Forum section: electronics / general

author: Falcon69
author_rank: Super Contributor
timestamp: June 12, 2015, 04:22:27 am
content: I can't get enough, this site is funny. I don't know why, but watching people doing stupid things just makes me laugh.This one is kinda funny. Reminds me of the old days going to Chuck 'E' Cheeses and playing Wak-A-Mole.There's another one of a guy standing on a laDDer on a 3 story building during construction with the ladder right on the edge. Idiot.
Electrical installation horrors - Page 1
Forum section: electronics / general

author: matseng
author_rank: Frequent Contributor
timestamp: June 11, 2015, 01:07:59 pm
content: While fixing a stuck light switch in my entrance I discovered this little gem. The guy that installed the alarm system apparently wanted to turn on (or flash) the porch lights when the alarm was triggered, so he took a low voltage "phone cable type" cable and connected across the porch switch and pulled in the conduits in the walls up the my second floor where the alarm central is located.I'm rather certain that this wire is *not* approved for connecting a 230 volt load that pulls 200-300 watts.Still, the quality of electrical installations in Malaysia is an order of magnitude better than what I seen in Thailand...

author: ncoonrod14
author_rank: Contributor
timestamp: June 11, 2015, 01:28:49 pm
content: Check these out if you think that's badhttps://reddit.com/r/OSHASent from my SM-G920V using Tapatalk

author: amyk
author_rank: Super Contributor
timestamp: June 11, 2015, 02:24:36 pm
content: Ampacity is likely to be a bigger problem there, as insulation on that type of cable tends to be rated at 300V or more.

author: SeanB
author_rank: Super Contributor
timestamp: June 11, 2015, 04:22:13 pm
content: Only 1A, so within the load rating of the fuse/cable. Here they will use that to run 20A, and use it as path illumination at the same time as well.

author: Kibi
author_rank: Unknown
timestamp: June 11, 2015, 05:24:15 pm
content: At the company that I worked for in Zimbabwe, it was quite common to draw the SDS drill out of stores to have it presented on the stores counter with 50 metres of CAT5 cable used to extend the cable. The mains cable was usually chopped in half with the section of CAT5 spliced in between with good old insulation tape.The funny thing is that there was a 50m spool of the appropriate cable in stock with which a suitable extension cable could have been made up. However, the 50m spool got used up after replacing the drill cable so many times. OIA!
Xantrex XHR 7.5 - 80A power supply - Page 1
Forum section: electronics / general

author: Andyf97
author_rank: Newbie
timestamp: September 15, 2014, 09:58:15 pm
content: Hi Guys and Gals,I am trying to find a schematic or service manual for a Xantrex XHR 7.5 - 80A power supply and having no luck with sorensen or xantrex websites or pretty much anywhere on the net.I am also trying to find exactly the part number for the red, black and green 30Amp 5 way binding/banana posts on the front of the unit ( photo attached of a similar model ).Best RegardsAndy

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: September 15, 2014, 10:29:31 pm
content: Andy,I can not help with the manual. The binding posts look like Superior Electric BP30x series. 'x' is the color.Details can be found here:http://www.danaherspecialtyproducts.com/uploadedFiles/Siteroot/Superior_Electric/Products_and_Solutions/5-WAY_Binding_Posts/SUPERCON%20CAT.pdfThese binding posts were often used on equipment made in North America.Regards,Jay_Diddy_B

author: GreyWoolfe
author_rank: Unknown
timestamp: September 16, 2014, 12:27:55 pm
content: I went and looked at those binding posts and they are only rated to 30A. I would be interested in some high current binding posts for a couple of 35A power supplies, but can't seem to find anything above a 30A rating.

author: Andyf97
author_rank: Newbie
timestamp: June 11, 2015, 01:50:53 pm
content: Thanks a lot guys, it was indeed those.Sorry for the late thank you too.
Sydney Maker Faire 2015 - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 11, 2015, 06:57:13 am
content: It's on again Aug15th & Aug16th at the PowerHousehttp://makerfairesydney.com/https://www.facebook.com/MakerFaireSydneyThey will make a public call in a few weeks for stands if you want one.After last year I suggested designing an electronic badge of some sort for this year, and they liked the idea, will have to see if they want to go for it.
Anyone have a battery tab welder, tabs and near Leicester - Page 1
Forum section: electronics / general

author: KJDS
author_rank: Super Contributor
timestamp: June 11, 2015, 03:27:08 pm
content: Help, I've got some replacement batteries but need some tabs welding on. I've just built a little welder which is a bit crap as I used too small a transformer, and whilst I could grab a bigger transformer and have another go I still have no tabs to attach to the battery.Can anyone help?
Trip - Nashville TN - Anything good for electronics? - Page 1
Forum section: electronics / general

author: Skimask
author_rank: Super Contributor
timestamp: June 01, 2015, 12:20:43 pm
content: Taking a trip soon to Nashville TN for a few days.Anything good in/around there as far as electronics type stuff goes?Swap meets, surplus stores, etc.?

author: Skimask
author_rank: Super Contributor
timestamp: June 09, 2015, 11:11:02 pm
content: Here now for another couple of days.Anybody got anything while I'm here?
Forum connection problems (June 2015) - Page 1
Forum section: electronics / general

author: nickn4
author_rank: Contributor
timestamp: June 09, 2015, 01:16:31 pm
content: Hellow there,i have been surfing for about a week on EEVblog forums now, and this is the first time i encountered problems where some pages did not load and some did (see details).just wanted to report this along with the error screen capture. if other people encounter similar issue's perhaps you can post your details so the problem can be looked into and possibly resolved.detailsthe connection problem went away in about 7-15 seconds.main forums did load but beginner forums did not. did not check other sub forums.also see the error in the enchantment.greetings,nick

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 10, 2015, 09:06:22 am
content: Whenever I see this (maybe once-twice a month) I just click the 'retry for a live version' and that solves it.

author: nickn4
author_rank: Contributor
timestamp: June 10, 2015, 06:33:19 pm
content: Quote from: PA0PBZ on June 10, 2015, 09:06:22 amyep that worked for me too at the time.
Problem with GTX 680 several graphic cards ----- PLEASE HELP - Page 1
Forum section: electronics / general

author: danmarki
author_rank: Newbie
timestamp: June 09, 2015, 07:06:21 pm
content: Hi everyone, I've got three GTX 680 with the same problem - no display output on ANY connector (HDMI, DVI, DP). I've tried everything humanly possible - tried it with several different PCs, different drivers, I've even tried reballing the GPU (gave it up for professional reballing) - still no signal. And starting from yesterday afternoon I've got another GTX 680 from Gigabyte with similan problem (Device Manager under Windows 64-bit says it stopped the GPU because its reporting problems - Error 43. Now sometimes with this card the system boots completely normal but mostly not (it starts but windowed even though the resolution is fullHD 1900*1080 and there is the excalamation mark in Device Manager). I believe these are similar issues and I beg anyone with bigger knowlege to please advice what is wrong with these cards because they are piling up on me and I can't seem to google anything out.There seems to be a problem with different GTX680 brands, thought the problem is the same - no output whatsoever (LEDs light up, fans spinning, but no signal).
UNI-T web site can't register - Page 1
Forum section: electronics / general

author: Deathwish
author_rank: Unknown
timestamp: June 09, 2015, 02:24:18 am
content: What numpty on a commercial website decided that the following @ is not an allowed symbol, then requires an email address to register?. As soon as you put in the xxxx@xxx.com for the email it tells you it is a disallowed symbol and throws you out.go drive yourself nutshttp://www.uni-trend.com/member_en/index_do.php?fmdo=user&dopost=regnew
Mikes voodoo - Page 1
Forum section: electronics / general

author: con-f-use
author_rank: Unknown
timestamp: June 08, 2015, 03:24:29 pm
content: I nearly shat my pants laughing while watching the two bits inMike's latest video.https://youtube.com/watch?v=rahzrPdEeE8#t=5m58s"Bla bla serious stuff bla bla"interlude"Bla bla more serious stuff bla bla"suddenly bananasGood giggles, thank you Mike!

author: daqq
author_rank: Super Contributor
timestamp: June 08, 2015, 04:13:42 pm
content: The end part (after minute 12 is also worth it).
Element 14 interviews authors of "The Art of Electronics" - Page 1
Forum section: electronics / general

author: nixfu
author_rank: Unknown
timestamp: June 07, 2015, 10:48:32 pm
content: element14 interviews "The Art of Electronics" authors Paul Horowitz and Winfield Hillhttp://www.element14.com/community/groups/stemacademy/blog/2015/06/05/a-conversation-with-the-authors-of-the-art-of-electronicsSome good stuff in there.QuoteQuoteQuote

author: saturation
author_rank: Super Contributor
timestamp: June 08, 2015, 02:03:19 pm
content: Thanks for the link. It has material and a flavor unlike the Adafruit interview, which should please those unused to streams of consciousness.

author: tggzzz
author_rank: Super Contributor
timestamp: June 08, 2015, 03:48:19 pm
content: Quote from: saturation on June 08, 2015, 02:03:19 pmJust so. There are alternative names for "streams of consciousness", none of them complementary.
A tale of two converters - Page 1
Forum section: electronics / general

author: IanB
author_rank: Super Contributor
timestamp: June 08, 2015, 12:18:03 am
content: I was watching Mike's latest video on very tiny DC-DC converters, and I was linked to a video on aB I Gconverter. Both have filters, capacitors, transformers and active control circuitry. Both equally fascinating in their own way. Quite a contrast though.Small:https://youtu.be/K6om51cr8MkLarge:https://youtu.be/ZOTGuWCfS-A
More radio power fun. - Page 1
Forum section: electronics / general

author: Dataforensics
author_rank: Unknown
timestamp: June 06, 2015, 03:43:26 pm
content: This cannot be good for the local noise floor.http://www.bbc.co.uk/news/technology-33020523Tony

author: SeanB
author_rank: Super Contributor
timestamp: June 07, 2015, 05:32:43 pm
content: Power efficiency would probably be under 0.01%, so while it does work it really is not something you should do. Should be handled like a regular incandescent lamp, which is banned for all but specialist applications where there is no other technology that works, like oven lamps or high ambient temperature lights.

author: Howardlong
author_rank: Super Contributor
timestamp: June 07, 2015, 07:09:18 pm
content: Also covered here, with some numbers.https://www.eevblog.com/forum/crowd-funded-projects/wave-a-cell-phone-that-charges-battery-with-wifi-signal/msg687309/#msg687309Efficiency 0.0009% just from the RF path losses.
Plastic junk from China - Page 1
Forum section: electronics / general

author: Deathwish
author_rank: Unknown
timestamp: June 11, 2015, 06:22:39 pm
content: So a while ago I purchased a Victor frequency counter from a chinese seller, nowt wrong with a chinese seller if he is honest and not his fault for the production line if he isnt making it himself.Today I had a visit from the heart and lung nurse, that wasnt too bad, as such, then my nemesis popped her head above the parapets to have a go again, and my hackles went up. Anyway, I shoved a tv on the bench in full anger, and shoved a oscilloscope probe into it. Then I connected up the new Victor just for the giggles and that is where the fun began, prodded the button to change to Mhz and it slid along on it's plastic base tilt mechanism that tucks under it and flew of the side of the bench onto the floor.Note to the Chinese producers reading these forums. Please put rubber feet on the things or at least remove / re design that awfull tilt mechanism. Oh and add a bit of lead weight to the base so it doesn't feel like junk and fly when prodded.
Defensive Electronic Countermeasures (1962)  - Page 1
Forum section: electronics / general

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 06, 2015, 01:54:27 pm
content: Cool.I wonder if the guts of those things are declassified too. Or even just some service and instruction level stuff.Tim

author: Homer J Simpson
author_rank: Super Contributor
timestamp: June 06, 2015, 02:02:01 pm
content: I found this YouTube channel by accident.If you are interested in military history, electrical, electronic and mechanical stuff from that era, (WW II, Cold War), this channel has a lot of content.https://www.youtube.com/user/QuarX

author: mcinque
author_rank: Unknown
timestamp: June 06, 2015, 08:39:56 pm
content: Very cool! Thanks

author: Alexei.Polkhanov
author_rank: Frequent Contributor
timestamp: June 06, 2015, 10:08:05 pm
content: Another nice channel - guy had tear downs of very cool old Soviet stuff, like ECM from old Migs, proximity sensor for "Strela-10" etc.https://www.youtube.com/channel/UCgg9rvXB9MIPYDrJeANsOUw.All that stuff is probably 70s.URL for Strela-10 manual, DJVU file in Russian, but diagrams are pretty clear.http://www.filedropper.com/strela-101990Another site I like ishttp://www.radartutorial.eu/19.kartei/ka03.en.html.It is created by guy who served many years in East German military during Cold War and then served in West Germany so he has lots of nice info on Cold War era hardware, photos etc. I spent whole evening and part of night reading his site once

author: Rerouter
author_rank: Super Contributor
timestamp: June 06, 2015, 10:41:14 pm
content: Impossible speed and position changes on radar... kinda sounds like the basis of a number of UFO stories...

author: mcinque
author_rank: Unknown
timestamp: June 07, 2015, 08:47:45 am
content: Quote from: Rerouter on June 06, 2015, 10:41:14 pmindeed!
Basic Principles of Frequency Modulation (1944) - Page 1
Forum section: electronics / general

author: kg4arn
author_rank: Unknown
timestamp: June 06, 2015, 07:46:22 am
content: I contend the most influential inventor in history: E. Howard Armstrong.http://en.wikipedia.org/wiki/Edwin_Howard_ArmstrongThe regenerative receiver which implements the valve as an amplifierThe superheterodyne receiver. The principle's use in our world of communication and test is incalculable.FM: the experts said it couldn't be done, then RCA stole it.

author: miguelvp
author_rank: Super Contributor
timestamp: June 06, 2015, 03:44:00 pm
content: Quote from: kg4arn on June 06, 2015, 07:46:22 amNot surprising, after all RCA was a monopoly conceived by the US Armed Forces to keep all communications in one company.http://en.wikipedia.org/wiki/RCA#Organization_by_General_Electric

author: TimFox
author_rank: Super Contributor
timestamp: June 06, 2015, 05:03:41 pm
content: The basic fight between Armstrong and Sarnoff (at RCA) is that RCA would not license patents, they only wanted to buy them and license them to other companies. Armstrong was independently wealthy and would not acquiesce to RCA's demands. Unfortunately, during one of the interminable lawsuits, Armstrong committed suicide.Eventually, when RCA was pushing television, the FCC required them to use FM for the sound transmission.
ZD916 - self turn off - Page 1
Forum section: electronics / general

author: vajda65
author_rank: Newbie
timestamp: June 05, 2015, 11:44:23 am
content: We have problem with ZD916 soldering station, it works some months fine, but now when we turn on, it get 25 degress and automaticaly turn off, after some seconds it is again automaticaly turn of and this again and again.Probably is some components fail, but dont know which.Is here anybody who knows?Thanks a boys.
How to pay paypal without using an account? - Page 1
Forum section: electronics / general

author: zapta
author_rank: Super Contributor
timestamp: June 06, 2015, 03:37:19 pm
content: I am ordering OLED displays from China and the vendor sent me an invoice (a doc, not a paypal invoice) and their paypal account name (it's a gmail address) . I want to pay with a credit card, not via a paypal account. Anybody knows how to do that?With previous orders from them I did the same with a paypal link that I found by searching the internet but I can't find it at the moment. I just add to replace the destination user id in the link and enter the amount and pay.

author: zapta
author_rank: Super Contributor
timestamp: June 06, 2015, 03:59:11 pm
content: Ok, found it, used this online paypal link generator.http://www.blogbyben.com/2009/04/paypal-link-generator-build-your-own-1.html
Project Soli - gesture input using radar - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 04, 2015, 06:14:37 pm
content: This looks fun...

author: Alexei.Polkhanov
author_rank: Frequent Contributor
timestamp: June 04, 2015, 10:05:31 pm
content: This is really exciting stuff. Make me feel like ... lucky bustards, I wish my project was as interesting as this...So now Google self-driving car can recognize if someone shows it a finger for cutting in line?

author: dexters_lab
author_rank: Unknown
timestamp: June 05, 2015, 04:22:01 pm
content: wow, that does look nice tech, soon to be in laptops, tablets and phones at a guess

author: Howardlong
author_rank: Super Contributor
timestamp: June 05, 2015, 05:38:40 pm
content: Right up my street, RF, mixed signal, DSP.I am sure they will have a lot,of work to do to make it work in a consumer environment without false gesturing, but it's already impressive.How long though before the media realises the same technology can be used to see through clothing?
Can we make this a thing? (oscilloscope selfies) - Page 1
Forum section: electronics / general

author: The_Unreasonable_Man
author_rank: Newbie
timestamp: June 04, 2015, 04:08:44 am
content: http://imgur.com/gallery/DZkLk

author: Falcon69
author_rank: Super Contributor
timestamp: June 04, 2015, 04:34:25 am
content: You guys are compensating for something, aren't you?

author: Muttley Snickers
author_rank: Unknown
timestamp: June 04, 2015, 04:53:00 am
content: In my collection there is a USB based unit, I think it's called a Poo Scope,Are you really sure you want a picture......Muttley

author: tautech
author_rank: Super Contributor
timestamp: June 04, 2015, 04:57:00 am
content: Does this one count?

author: atferrari
author_rank: Frequent Contributor
timestamp: June 04, 2015, 02:51:41 pm
content: I know those scopes are really cheap but I wouldn't dare to hold them like that for a single second. There are better risks to take and later is always too late.

author: calexanian
author_rank: Super Contributor
timestamp: June 04, 2015, 10:08:21 pm
content: I would steer clear of the guy with a Mass Spectrometer on his shoulder.

author: N2IXK
author_rank: Frequent Contributor
timestamp: June 04, 2015, 10:13:00 pm
content: I want to see one with a Tek 555.Mainframe and power supply on separate shoulders, of course.

author: GreyWoolfe
author_rank: Unknown
timestamp: June 05, 2015, 07:44:44 pm
content: Not a 555, but how about a 533A? Sorry, it's not embedded but it is what it is. By the way, not compensating for anything, SWMBO will swear to that

author: Deathwish
author_rank: Unknown
timestamp: June 05, 2015, 08:04:17 pm
content: Notice how the older crew don't wear shades indoors....... very cool.

author: miguelvp
author_rank: Super Contributor
timestamp: June 05, 2015, 08:13:58 pm
content: Was the hole in the wall there before?Or was it a side effect from the selfie?

author: GreyWoolfe
author_rank: Unknown
timestamp: June 05, 2015, 08:44:33 pm
content: No, the hole was there, The towel rack pulled out of the wall on Wednesday. That is a weekend project. Death, shades are only for outside.

author: ivan747
author_rank: Super Contributor
timestamp: June 06, 2015, 02:30:33 pm
content: Quote from: GreyWoolfe on June 05, 2015, 07:44:44 pmThat rocks!

author: willb
author_rank: Regular Contributor
timestamp: June 07, 2015, 01:42:28 pm
content: I thought of taking a selfie with my DS2072, but that's too boring... Tek 2445? Tek 475A? Meh. AN/USM-339 (Mil-Spec HP 1700B)? That's more like it!
The Electronics (OT) Side of the USS Montana... - Page 1
Forum section: electronics / general

author: Mechatrommer
author_rank: Super Contributor
timestamp: June 04, 2015, 02:09:31 pm
content: maybe an old pre-iraq demolition aftermath, but... i thought this is farting hillarious, i thought its so blaady sophisticated...somewhat better graphics...in the end, they got it filmed in english version...justgo to watch it again until my tears drop...

author: saturation
author_rank: Super Contributor
timestamp: June 04, 2015, 02:16:17 pm
content: http://en.wikipedia.org/wiki/Lighthouse_and_naval_vessel_urban_legend

author: Mechatrommer
author_rank: Super Contributor
timestamp: June 04, 2015, 02:21:54 pm
content: now there another version, this time USS Abraham Lincorn, i believe this is more trastable, i dont think i ever hear Montana the biggest ship... anyway someone took this seriously probably an box office...

author: zapta
author_rank: Super Contributor
timestamp: June 04, 2015, 04:51:14 pm
content: It'a a myth that lighthouses do not move.
Tartu MMF is coming again! (Baltics) - Page 1
Forum section: electronics / general

author: makerimages
author_rank: Regular Contributor
timestamp: June 04, 2015, 04:00:30 pm
content: It's about time, this gets up here. With the Maker Faire season kicking off, many of you might know (atleast if you live in the Baltics), that last year we had the first Tartu MMF. Huge success. Guess what, it's comign again! This year on the 20th of September, in Science Cenre AHHAA in Tartu, Estonia. Come and check it out!http://makerfairetartu.ee/
need help with usb film scanner asap  - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: June 03, 2015, 09:22:39 am
content: i have a usb film scanner i got on clearance from a store for $15 as it was missing the software cd it is a Transonic Filmscan 35iit also has other names like svp Filmscan 35ii found the software for the camera herehttp://loosecanonblog.blogspot.co.nz/2014/06/filmscan-35i-driver-and-review.htmli have installed it but getcan not find camerabut if i open vlc player it will see the camera and is able to open it could just use that to take a screenshot but its only displaying at 592x392 when this scanner should take pics at 5mpplz help i need these photos asap
HP 9100 from 1970 - Page 1
Forum section: electronics / general

author: nfmax
author_rank: Super Contributor
timestamp: June 02, 2015, 09:02:59 am
content: A remarkable machine! The only IC's used are in the magnetic card reader, and the main ROM is a multilayer PCB - magnetic coupling between the tracks on different layers encoding the data! More information here:http://www.hp9825.com/html/the_9100_project.html

author: German_EE
author_rank: Super Contributor
timestamp: June 02, 2015, 03:52:58 pm
content: I would have sold my soul to go and work in an environment like that! Thanks for that little bit of history.

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 02, 2015, 06:45:49 pm
content: 5 cent per program over 5 years... hmm26 programs per hour, 6 hour per day, 180 days per year, 5 years.26*6*180*5/20 = 7000 in 70sdollars.
fuse resistor Identification and Value?  - Page 1
Forum section: electronics / general

author: Sid Snake
author_rank: Newbie
timestamp: June 01, 2015, 09:06:27 pm
content: Hi to Everybody.Can someone Please help me, can someone please tell me how to identify the value of a fuse resistor, it looks like a ceramic capacitor Disc, it has a SCL 083 On it about 10mm across and 4mm thick and a mustard color? thank you in advance.Sid

author: SeanB
author_rank: Super Contributor
timestamp: June 02, 2015, 06:06:05 pm
content: 3A polyfuse, ratings are around half way down the page.http://www.allproducts.com/ee/taos/03scl_print.html8R resistance at 25C, max current 3A and around 278R when tripped, dissipates 17W.
Flir hackathon, London - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 02, 2015, 08:19:56 pm
content: http://flir-london-challenge.challengepost.com/

author: German_EE
author_rank: Super Contributor
timestamp: June 02, 2015, 08:56:03 pm
content: Mike, are you going to enter?

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 02, 2015, 09:23:32 pm
content: Quote from: German_EE on June 02, 2015, 08:56:03 pmDoubt it, unless I happen to think of something interesting in time.