hybridfree/eevblog-posts huggingface dataset:
Vintage "Transformers" on E-bay - Page 1
Forum section: electronics / general

author: Excavatoree
author_rank: Frequent Contributor
timestamp: August 29, 2012, 05:55:39 pm
content: http://www.ebay.com/itm/2-Western-Electric-RET-151C-Transformers-1930s-Vintage-Have-Continuity-/130752227021?pt=Vintage_Electronics_R2&hash=item1e7170a6cdThese are very unusual transformers - the kind that have only two terminals and are marked "L1" and "L2." I thought about sending the seller a correction, but most sellers aren't very receptive, and I figured that no one who would be buying a transformer would be fooled - but now I'm not so sure.Yes, there are 4 lugs, but a very brief observation shows there are only two terminals.Who knows what is going on in the seller's head, but one possibility is he thinks he has a part of a valuable tube amp, and some equally clueless buyer is all too ready to buy what he or she thinks are vintage, Western Electric transformers.The seller has sold at least two sets of these.Did I have an obligation as a decent person with the knowledge to inform the seller that he was not selling transformers?Or am I completely wrong - are vintage, crappy, moldy iron core inductors really worth 130 US dollars each? I've seen audiofools spend more for less.

author: david77
author_rank: Frequent Contributor
timestamp: August 29, 2012, 06:10:00 pm
content: I'd say those are some sort of chokes from a power supply.If someone without a clue buys them as "transformers" bad luck, that's ebay for you I guess. They should have gone get a clue before wasting money.

author: poptones
author_rank: Frequent Contributor
timestamp: August 29, 2012, 06:18:25 pm
content: Yeah, what are you gonna do? Start policing ebay for ebay?They're WE, they'll get a load of money. You can't nanny people. Someone will buy them and use them for power supply chokes or plate loads in a preamp or god knows what. They're almost 100 years old and they're WE, they have mojo for many.

author: amyk
author_rank: Super Contributor
timestamp: August 30, 2012, 10:16:56 am
content: Maybe if you put two of them right next to each other they can act like averypoor transformer...

author: Simon
author_rank: Unknown
timestamp: August 30, 2012, 11:44:41 am
content: try buying new toroidal transformers, you may get the right voltage

author: szhighstar
author_rank: Contributor
timestamp: August 30, 2012, 11:46:14 am
content: sure, two transformers are special.
Tektronix 2400 Series Scope Hoz. Output IC Failure - HowTo Confirm - Page 1
Forum section: electronics / general

author: tec5c
author_rank: Frequent Contributor
timestamp: August 28, 2012, 05:09:21 am
content: I decided to make a short video after my Tektronix 2465BDV had developed a fault, in which after booting up the unit the display would be normal for around 30sec - 2 min and then it would disappear. Sometimes you could see the display quickly drift off to the side (left in my case). I knew the IC, location: U800, was no longer available and fairly expensive to buy second hand. I did not want to spend over $100 on an IC and then find out it did not fix the problem.The video shows the unit after completing boot up stage and the display is as expected. The fault soon after occurs and the display disappears, just before this happens the frequency readout tends to jitter quite extensively (it's not so visible on camera). I spray some instant freeze on the suspected IC and the you can see the display slowly drift back onto the display, confirming the IC to be the cause. After shooting this video I have now confidently ordered the IC from the US and am looking forward to getting the scope back up and running.I hope someone may find this video helpful. It is my first youtube clip and I didn't commentate throughout so it could be better perhaps.Jason.

author: BravoV
author_rank: Super Contributor
timestamp: August 28, 2012, 07:09:22 am
content: Hey Jason, thanks for the video, this is definitely a good reference for old analog tek scope owners that have the Unobtainium800 IC.Really sorry to hear this nice scope is having problem, hope the replacement will fix that completely.As a 2465B owner, currently I used two copper sinks on top of it with sticky 3M thermal pad.Actually I was planning to make a better thermal contact thru the bottom of the ic body since that metallic tab is exposed like this pic below, but still have no time to do it cause this will need a major workout at the big main A1 board.Fyi just in case you're not aware of it, be careful, the ic's metal tab is -5 volt instead of ground.If you have extra plan to cool this precious IC when you're going to replace the old one, share it here please.PS : Made a teardown thread of my 2465B while ago here ->https://www.eevblog.com/forum/product-reviews-photos-and-discussion/tektronix-2465b-oscilloscope-teardown/
Obsessed with NASA-Help? - Page 1
Forum section: electronics / general

author: djsb
author_rank: Super Contributor
timestamp: August 26, 2012, 03:56:44 pm
content: I'm becoming obsessed with NASA and it's shenanigans, Please helpJust spent a sunny afternoon indoors watching thisThat got me curious about actual apollo 11 film footage (can't believe most of the original it was wiped/lost).and found thishttp://www.hq.nasa.gov/alsj/a11/video11.htmlI can't remember much now about watching the moon landings when I was 8 years old on TV during my summer school holidays. Must have seemed boring or maybe I felt overwhelmed by what I was seeing. I remember all the beeping as mission control spoke to the crew. I remember staying up into the night (which was a privilige for an 8 year old).But from an emotional point of veiw I can't look at photo's of the Earth from space without wanting to cry. I get tears in my eyes every time I see it.I'm only now beginning to take it what they actually achieved back then. It's beyond words.

author: bullet308
author_rank: Frequent Contributor
timestamp: August 26, 2012, 04:35:46 pm
content: The Dark Side is beckoning...

author: johnboxall
author_rank: Unknown
timestamp: August 27, 2012, 01:33:15 am
content: For a counter-point, find a copy of "Capricorn One".

author: bullet308
author_rank: Frequent Contributor
timestamp: August 27, 2012, 03:48:02 am
content: I saw that in the theater...an exercise in cinematic mediocrity.

author: TerminalJack505
author_rank: Super Contributor
timestamp: August 27, 2012, 04:30:15 am
content: Anyone seen the HBO mini series "From the Earth to the Moon"? Is it worth picking-up a copy?I haven't seen it but it looks like they deal with a lot of the engineering aspects of the Apollo program.

author: westfw
author_rank: Super Contributor
timestamp: August 27, 2012, 09:24:24 am
content: If "From the Earth to the Moon" is the show I'm remembering, it was very good.

author: saturation
author_rank: Super Contributor
timestamp: August 27, 2012, 10:51:15 pm
content: Yes, the documentary too, "For All Mankind" is a condensed documentary version of details dramatized in "Earth to the Moon".http://en.wikipedia.org/wiki/From_the_Earth_to_the_Moon_%28TV_miniseries%29The best on film are here:http://en.wikipedia.org/wiki/Apollo_program#Depictions_on_filmThe two above I think, are the best of the group.Quote from: TerminalJack505 on August 27, 2012, 04:30:15 am

author: FenderBender
author_rank: Super Contributor
timestamp: August 27, 2012, 10:52:55 pm
content: Quote from: djsb on August 26, 2012, 03:56:44 pmAh at least someone is benefiting from my tax dollars!
'anti creep' mode on electrical khw meter  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 27, 2012, 06:37:00 pm
content: what is it ?i understand it enter this mode when there is no load on it why the silly name ?

author: SeanB
author_rank: Super Contributor
timestamp: August 27, 2012, 06:55:04 pm
content: If there is no load the slight current drawn by the voltage coil ( or the meter electronics for more modern ones) would be registered as power use in the home. Thus when the load is low the meter does not advance the reading, in mechanical meters this is done by a damping mechanism, in electronic ones it is programmed in to ignore current below a certain low level. My one meter indicates I use around 1 unit in 6 months as standby current in the airconditioner.

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 27, 2012, 07:15:34 pm
content: ah yes thought it was that, and creep being the meter creeping up got it cheers
Van De Graaf demo at Boston Science Museum - Page 1
Forum section: electronics / general

author: JuiceKing
author_rank: Regular Contributor
timestamp: August 28, 2012, 12:25:01 pm
content: I took my family over the holiday to the Boston Science Museum, where we saw a demo of the giant, two-story Van De Graaf generator that was VDG's personal instrument. They did the usual "girl in the cage" demo which, I have to admit, I would be too chicken to try myself. The guide told me afterwards that the demo is much more frighteningly impressive in the winter, when humidity is low. A good reason to make another trip.If you do visit the museum, seek out special exhibits. Last time I was there, there were various demonstrations of fluid dynamics (in connection with planetary research) and ample opportunity to chat with the enthusiastic MIT students who had come to share what they know and were eager for an interested audience.
Forbes Nonsense : Claims Android Copies iPhone - Page 1
Forum section: electronics / general

author: T4P
author_rank: Super Contributor
timestamp: August 27, 2012, 04:48:16 pm
content: Since when did android's UI look like a iPhone?http://www.forbes.com/sites/ewanspence/2012/08/25/in-the-apple-vs-samsung-decision-the-real-winner-is-microsofts-windows-phone/

author: HardBoot
author_rank: Regular Contributor
timestamp: August 27, 2012, 04:58:12 pm
content: Forbes owners are Apple shareholders, also a crap news outlet at best of times.

author: saturation
author_rank: Super Contributor
timestamp: August 27, 2012, 05:20:17 pm
content: I think the gist of the article is that at least Windows 8 looks nothing like iPhone UI, so its unlikely to be sued. Android does have some UI similarity, enough to concern Google, its one reason Google bought Motorola Mobility. I think google strategy is pre-emptive, sue Apple now for Motorola patents, so if say $1B is awarded for UI infringement, Google will ask for $1B back in other infringements.http://www.bloomberg.com/news/2012-08-17/google-s-motorola-files-new-patent-case-against-apple-at-itc.htmlThe Siri agent is one. Motorola has had that 'say a command' voice recognition feature since the late 1990s; I use it a lot. On Android its now moot since it has its own, but Motorola could have sued Google over it too.I had a chance to play with Win8 for a few minutes and was impressed. One weakness of Android and iPhone is the icons and apps need to be manually categorized into folders. I have apps all over the place and some I can't find. Win8 seems to metatag apps can groups them automatically, and it seems to 'know' which app is related when its installed, it can also be manually categorized but still maintain the inherent links. Transferring data between apps is transparent, no copy to clip board past from clipboard scenario.
ALDI: T-shirt transfer paper for PCB thermal transfer artwork? - Page 1
Forum section: electronics / general

author: asbokid
author_rank: Regular Contributor
timestamp: August 22, 2012, 12:50:46 am
content: Hello!ALDI, the German discount store, is currently selling "T-SHIRT TRANSFER PAPER" - 10 sheets for GB£3.99. Back in 2010, I see they were just £1.99 *sigh!*See:http://www.aldi.co.uk/uk/html/offers/special_buys3_25856.htmTwo different sorts of transfer paper are for sale: for light T-shirts and for dark T-shirts.The wording on the packet reads:QuoteThe paperseems to work well on fabric, but has anyone tried it for transferring artwork to a PCB for etching?If so, do you have any advice, please?Cheers, a

author: westfw
author_rank: Super Contributor
timestamp: August 22, 2012, 07:49:05 am
content: usually these sorts of things have an all-over film that transfers to the t-shirt, rather than transferring just the toner (especially if they're designed for inkjets.) Might be good for front panels and silkscreen layers.

author: asbokid
author_rank: Regular Contributor
timestamp: August 23, 2012, 01:48:58 am
content: Aha! Thanks for the tips, westfw and wilfred. I bought a couple of packs of the transfer paper, so I will try it out and report back with my success (or not!)cheers, a

author: ttp
author_rank: Regular Contributor
timestamp: August 23, 2012, 12:49:59 pm
content: I'm having good results with "the glossy paper for digital colour laser systems" by mondi (www.mondigroup.com)

author: krivx
author_rank: Frequent Contributor
timestamp: August 23, 2012, 02:20:59 pm
content: This guy has gotten good results using the brochures that Lidl and Aldi have stacked next to the door for free...http://www.hw2sw.com/2011/09/29/how-to-make-pcbs-at-home-the-toner-transfer-method/

author: westfw
author_rank: Super Contributor
timestamp: August 23, 2012, 04:36:54 pm
content: (note that "T-shirt transfer paper" and "PCB toner transfer paper" are entirely different things. The latter works only in laser printers and has a bunch of substitutes (glossy photo paper, clay-coated magazine paper, label backing paper.) But I don't think the T-shirt paper is one of the viable alternatives (nor do those other things work for transferring to T-shirts.)

author: trustfm
author_rank: Newbie
timestamp: August 27, 2012, 01:57:55 am
content: Hello !I am a part/member of hw2sw.com and as the user "krivx" said the lidl brochures worked for me extremely well.I have tested a lot of glossy papers without any good results. The lidl brochures worked way better.I am using this method for over a year now.The paper thickness is the key for good toner transfering. Since this solution is free in Europe i do not see any reason why someone at least not test itEmail me or use pm if you have any problems.Have a nice day !
UT-71C multimeters temperature pot for calibration? - Page 1
Forum section: electronics / general

author: maxiq4
author_rank: Contributor
timestamp: August 22, 2012, 08:30:04 am
content: himy uni-trend UT-71C multimeters need temperature calculateits measure 3-4C highdo you know which potentiometer is it on the board ?this is ut71d board but its so close I think.http://hkbbs.leowood.net:88/incomefiles/20088/123533115737.JPG

author: Lightages
author_rank: Unknown
timestamp: August 25, 2012, 03:58:01 pm
content: First thing, these meters are crap. I have the 71E and wish I had never wasted my money on it.Secondly, I have attached the PDF for calibration procedures. Good luck.....The file is for Voltcraft models which are just rebranded Unitrend.

author: maxiq4
author_rank: Contributor
timestamp: August 26, 2012, 07:02:53 am
content: thank your interesting
Metex DMM calibration manual - Page 1
Forum section: electronics / general

author: IvoS
author_rank: Frequent Contributor
timestamp: March 11, 2012, 05:35:40 pm
content: I am trying to find calibration manual for this Metex DMM M-3270. This multimeter is (I guess) 14 years old but I love it so much, the rotary switch click feel is best out there. There are 4 trim pots on the board plus one trim pot under the LCD, I have no idea which trim pot to turn for voltage, resistance etc. adjustments.Any ideas?

author: Unknown
author_rank: Unknown
timestamp: March 11, 2012, 05:52:13 pm
content: You could try to find out if Conrad rebranded it at some point, they sometimes have schematics and calibration instructions available. They have sold a bunch of Metex products under their own brand 'Voltcraft'. I believe these days it tends to be Uni-T. Once you've found an article number, you should be able to find the manual on theEnglishorGermanwebsite. Their German website is the oldest and usually the most complete.Failing this, the only option I see is trial and error. Only four trimmers, and a limited number of options. My guess is one for DC voltage gain, one for AC voltage gain, maybe one for DC offset or for the lowest DC range.

author: grenert
author_rank: Frequent Contributor
timestamp: March 11, 2012, 06:36:39 pm
content: Many years ago Radio Shack sold some rebranded Metex meters. Perhaps you might find one that looks like yours and has a manual available.

author: retiredcaps
author_rank: Super Contributor
timestamp: March 11, 2012, 08:43:14 pm
content: Schmatic for your multimeter is athttp://elektrotanya.com/metex_m3270_multimeter_sch.pdf/download.html

author: IvoS
author_rank: Frequent Contributor
timestamp: March 15, 2012, 09:31:07 pm
content: Thanks very much.

author: retiredcaps
author_rank: Super Contributor
timestamp: March 16, 2012, 05:37:59 am
content: Let us know which VR controls what. My schematic reading skills are terrible.

author: IvoS
author_rank: Frequent Contributor
timestamp: August 25, 2012, 10:12:15 pm
content: Finally had some time to play with my old METEX meter. I adjusted everything except current, there is no adjustment trimpot on the PCB. I would have to grind off the shunt or change resistors around it. Another trimpot VR1 is under the display which makes it inaccessible to turn with display in place.
Raise money to build a Tesla museum on the site of his old laboratory - Page 1
Forum section: electronics / general

author: ryangrimm
author_rank: Newbie
timestamp: August 24, 2012, 04:00:03 pm
content: I'm surprised that nobody has posted about this yet!A non-profit in New York is trying to buy the land that still holds Tesla's laboratory. If the land is purchased, the plan is to build a Tesla museum as well as a science center (not totally sure what that means but it sounds good!). The initial goal was to raise $850,000. That money will unlock a matching grant from New York state and purchase the land. Amazingly enough, in 8 days over $1 million has been raised!The Oatmeal (Matthew Inman) is a bit of a Tesla fan and got the fundraising going for this project via one of his classic comics. If you're not familiar with The Oatmeal, check out the comic here:http://theoatmeal.com/blog/tesla_museumIf you're a Tesla fan and want to donate, hit up the fundraising page:http://www.indiegogo.com/teslamuseum

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 24, 2012, 07:00:53 pm
content: what a bloody good idea that is
Water Light Grafitti - Nice LED art work - Page 1
Forum section: electronics / general

author: mariush
author_rank: Super Contributor
timestamp: August 26, 2012, 04:30:15 am
content: http://www.tecca.com/news/2012/08/22/water-light-graffiti-videoVideo :The "Water Light Graffiti" is a surface made of thousands of LED illuminated by the contact of water. You can use a paintbrush, a water atomizer, your fingers or anything damp to sketch a brightness message or just to draw. Water Light Graffiti is a wall for ephemeral messages in the urban space without deterioration. A wall to communicate and share magically in the city.More pictures and details on Digitalarti : bit.ly/O2v7aw

author: T4P
author_rank: Super Contributor
timestamp: August 26, 2012, 05:45:03 am
content: I would think a shitload of precision moisture sensors? Or capacitive sensors

author: cwalex
author_rank: Frequent Contributor
timestamp: August 26, 2012, 07:13:36 am
content: There should be one in every urinal!

author: Psi
author_rank: Super Contributor
timestamp: August 26, 2012, 07:30:49 am
content: Maybe just adjacent pcb tracks/pads.Subtract out the resistance from the thin film of residual water that sticks on the pcb.Any lower resistance than that = water detected.

author: Astroplio
author_rank: Regular Contributor
timestamp: August 26, 2012, 07:31:47 am
content: From what I understand here:http://youtu.be/Ch-gYF1v3lsThey use no special sensors, water comes in contact with PCB, bridges the traces around the LED so as the total resistance changes so does the LED luminosity. When water evaporates LED goes off again.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 26, 2012, 08:54:34 am
content: Cool but won't last long due to electrolytic corrosion. Running on AC with back-to-back LEDs may be slightly more durable.
9 Volt Led Flasher - Page 1
Forum section: electronics / general

author: Mattwarne
author_rank: Contributor
timestamp: August 22, 2012, 12:46:13 pm
content: Hi guys,I need to make a sign that has 2 sets of 10 leds that alternately Flash.They are blue 3v3 volt typical but I will be using a 300 ohm resistor because I will be operating this from a nine volt battery.Does anyone know how I can make them alternately Flash?I need this help because I am Making a sign for pedal prix.By the way I am 12 years oldMatt

author: Rerouter
author_rank: Super Contributor
timestamp: August 22, 2012, 01:09:33 pm
content: always nice to see some younger enthusiesthere would be the most basic circuit to use for ithttp://www.reprise.com/host/circuits/transistor_flasher.aspand to help you out, i even went and made a simulation of how you could use it to switch all of your led's at once,http://tinyurl.com/cltno7lwhich effectivly uses a transistor like a switch switching on and off all your led'sand because all 10 leds will draw under 300ma (pretty much as high a current as you want to draw from a 9V) you can get away with a single batterythe values i have given for the simulation will give a flash rate close to 60Hz so you may want to slow it down,you can do that by either increasing the valuse of r1 and r2, or the size of c1 and c2,hope this helps and good luck

author: PSR B1257
author_rank: Frequent Contributor
timestamp: August 22, 2012, 02:23:32 pm
content: QuoteIn case you dont know it yet: Each LED need its own resistor.So you would need actual 20 resistors. But there is a littetrick: connecting several LEDs in series. In your case, you can connect 2 in series. The resistor value need to be reduced to 150 Ohm then.QuoteAt which frequency? And how long?I'm asking how long, because a 9V batterie only got a litte capacity. So it would not run to long, while flashing 20 LEDs.Here:http://www.circuitstoday.com/555-tester-circuityou find another easy circuit to flashing LEDs. You can parallel them up to 2x5LEDs (high an low side) with a 150 Ohm resistor, because the NE555 can deliver up to 225mA.Edit:If you want the LEDs flashing at 5Hz (5 times on and off per second) for example, you have to change the capacitor C1 to 1µF, the resistor R1 to 6.8k and R2 to 150k.

author: PSR B1257
author_rank: Frequent Contributor
timestamp: August 24, 2012, 05:14:43 pm
content: Thought, I drew a little* sketch for you, so here it is:*)these time with the second "l" - not sure what happend the last time
gerber files - Page 1
Forum section: electronics / general

author: blackjames
author_rank: Regular Contributor
timestamp: August 23, 2012, 07:07:18 am
content: hello forum members, i know this post should be in the pcb section, but nobody uses that section very often. anyway, does anyone know how i can generate gerber files from my cadsoft eagle pcb design.the sooner someone can reply, the better, because i need to order these pcbs in the very near future.

author: blackjames
author_rank: Regular Contributor
timestamp: August 23, 2012, 08:35:55 am
content: dont worry. i found out, and now its "all done and dusted"
edX: New Courses - Page 1
Forum section: electronics / general

author: olsenn
author_rank: Frequent Contributor
timestamp: August 22, 2012, 01:49:02 pm
content: Hi Guys,I just thought I'd mention to those who don't know, that edX, the new and free online university comprising MITx, Harvardx, and Berkleyx, is now offering six new courses, in addition to 6.002x - Circuits & Electronics, which was also offered last year. Most of these new courses focus on software development; I've listed the courses below:- 3.091x: Introduction to Solid State Chemistry- CS50x: Introduction to Computer Science 1- CS169.1x: Software as a Service- 6.002x: Circuits & Electronics- PH207x: Health in Numbers - Quantitative Methods in Clinical & Public Health Research- CS188.1x: Artificial Intelligence- 6.00x: Introduction to Computer Science & ProgrammingHere is a link to their website:https://www.edx.org/

author: ElektroQuark
author_rank: Unknown
timestamp: August 23, 2012, 06:10:12 am
content: I will be taken these:- 3.091x: Introduction to Solid State Chemistry- 6.002x: Circuits & ElectronicsAnyone?
Using uCurrent to measure sleep mode current - Page 1
Forum section: electronics / general

author: rocksoft
author_rank: Newbie
timestamp: August 22, 2012, 10:13:12 am
content: Hi,Wanted to ask if anyone has used the uCurrent device to measure current usage for a radio device that uses very low current in sleep mode but pulses to a relatively high current when transmitting, and specifically how to avoid blowing up the uCurrent kit?I have a module that uses the si1000 MCU+Transeiver. I want to measure the sleep current as accurately as I can so I bought a uCurrent box.The radio unit uses less than 1ua in sleep mode but pulses at 100ma. I can change the software to stop it transmitting (it is the sleep current I'm interested in) but at startup the default state of the microcontroller uses about 5ma. Even if the first line of code is "go to sleep" I will have a period of 5ma before switching to sub microamp.Anyone have any nifty ideas how to measure the sleep mode current without killing the uCurrent box?This might be obvious to a hardware engineer so I though I would ask! I'm a software engineer by trade, electronics is a hobby so hardware things are not always obvious to me.Cheers,Liam.

author: Rerouter
author_rank: Super Contributor
timestamp: August 22, 2012, 11:00:57 am
content: on the uA range, the ucurrent uses a 10 ohm resistor, even with those 100mA pulses that is only 0.1W, i would imagine the resistors dave are using could survive that even continuosly,however you would see your meter jumping towards the battery voltage as the op amp clips on each pulse (pulse only correlates to 1V, so still would not risk damaging the op amp)more than 300mA is where you want to worry, as you start reaching voltages higher than the supply to the op amp,

author: PA0PBZ
author_rank: Super Contributor
timestamp: August 22, 2012, 11:17:32 am
content: If you are still worried, just bridge the uCurrent, start your controller and then remove the bridge.

author: rocksoft
author_rank: Newbie
timestamp: August 22, 2012, 12:39:20 pm
content: Thanks for the thoughts, sounds like I won't fry it the first time I try it then. I thought about briding it but wasn't sure what that would do to the uCurrent. Do you know if you can change the range switch without interrupting the current?

author: Rerouter
author_rank: Super Contributor
timestamp: August 22, 2012, 12:47:54 pm
content: from memory that will break the circuit (break before make switch) but i may be wrong, either way if your peaks are only 100mA you cant hurt the thing,
I Wanna Be An Engineer - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: August 19, 2012, 04:11:25 am
content: !

author: PA4TIM
author_rank: Super Contributor
timestamp: August 21, 2012, 08:35:38 am
content: Great lyrics, i love it.

author: poptones
author_rank: Frequent Contributor
timestamp: August 21, 2012, 09:44:20 am
content: How do you make it embedded?Very cool video. Is this where we post nerdcore vids?

author: poorchava
author_rank: Super Contributor
timestamp: August 21, 2012, 07:55:53 pm
content: EPIC!btw.'nerdy':not so nerdy but totallyEPIC!
Why Your Makeup ANd Potions Do Not Work - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 21, 2012, 08:53:26 pm
content: Yeah Yeah, odd topic but now you have good reason not by the other half overpriced snake oil stuff againBen Explaining Why Your Make Up And Potions DO NOT WORK

author: Rerouter
author_rank: Super Contributor
timestamp: August 22, 2012, 11:09:42 am
content: thank you for thatconfirmed my many suspicions and i'll have a bet that same mentality covers 95% of home remedies to diseases,

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: August 22, 2012, 11:50:00 am
content: I spent an extra half an hour of my life at Sydney Airport I'll never get back because my travelling companion had a duty free shopping list chocked full of potions and other stuff for his wife.First of all Airport duty free didn't have half the crap he wanted and it was over priced or perhaps still too expensive. And to cut a long story short it all deteriorated from that point.To be fair though, his wife (for her age) is still pretty foxy and I'd give her one given the opportunity.
Car Emobilize Pwned With Bruteforce Attack  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 21, 2012, 06:02:20 pm
content: i built something similar years ago with mixed results, it probably doesn't come as any news to you that car manufactures were using infective security systems, let alone the amount of time it takes to bruteforce a 4 digit pin.security is a strange thing, its something you must have, but only history will tell if something is secureanybody surprised ?

author: SeanB
author_rank: Super Contributor
timestamp: August 21, 2012, 07:13:19 pm
content: Funny thing is BMW radios have a pretty good pin system. 3 tries, then a 1 hour lockout, then 3 tries and so on. Been bitten by it before, and the nice thing is it makes the radios a non wanted item, though the cd changers get stolen ( they fit BMW and Mini's with the factory radio with no code).The old 7 series had a 4 digit lock pin, easy to reset if you knew how, just disconnect the computer box in the rear then start it.

author: poorchava
author_rank: Super Contributor
timestamp: August 21, 2012, 07:42:36 pm
content: In Europe i think the most often stolen brand of cars are the ones from VAG group (VW, Audi, Skoda, Seat + others). I don't know if they have fixed this issue (i got to know about this like 4 years ago), but in most cases carjacker would simply bruteforce the hood or one of the door and replace the stock ECU with cracked one and wouldn't care if the thing has immobiliser or not.The problem was, that ECU was too easy to take out, and even when the alarm was set off, a trained carjacker could replace the ECU and drive away before the owner got out of his house.And in case of more expensive cars... Security mechanisms are no object. A neighbour of mine had some quests, who came with a pretty high end, one month-old SUV (Audi Q7 or something similar). They had a really massive wall around their property, with even more massive gate, sophisticated alarm system connected to a private security company, a trained dog (+my two dogs who generally are tripped off by anything and start yapping in any random moment of the night). And yet, the car has vanished overnight. Not a sound, no alarm, no nothing... and no ~$200k car either. I guess that people making living off it have their own ways

author: SeanB
author_rank: Super Contributor
timestamp: August 21, 2012, 07:55:42 pm
content: POlice regulary arrest guys with a ECU and akey for it. They can unplug the original and plug in the replacement, then tape the key to the lock and brute force it, or unplug the loom and use a switch, then drive off. You buy a security kit, that has a cover for the ECU, and a plate to protect the starter and a further one that protects the latch mechanism.
The virtual border cop who knows if you’re lying  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 20, 2012, 07:59:52 pm
content: despite there being no measurable mechanic to determine weather one is lying.......Developed by University of Arizona researchers in collaboration with U.S. Customs and Border Protection (CBP), the computer is known as the Automated Virtual Agent for Truth Assessments in Real-Time — or AVATAR — kiosk.It uses sensors to screen passengers for unusual physiological responses to questioning — which can indicate a subject is lying…http://edition.cnn.com/2012/08/15/travel/computer-border-official-avatar/index.html?

author: tom66
author_rank: Super Contributor
timestamp: August 20, 2012, 08:32:07 pm
content: Another thing for the gov't to waste money on.Why not spend it on more constructive projects, such as invading another middle-eastern country?

author: FenderBender
author_rank: Super Contributor
timestamp: August 20, 2012, 09:24:57 pm
content: Quote from: tom66 on August 20, 2012, 08:32:07 pmThat's what I'm sayin.

author: Michael Weston
author_rank: Contributor
timestamp: August 21, 2012, 10:29:55 am
content: An article titledNaked TSA Protest: Oregon Judge Says Go For Itand maybe an article titledThe TSA Does Not Have A Game Plan For Large Penisesmay be of interest to you.

author: EEVblog
author_rank: Unknown
timestamp: August 21, 2012, 12:13:38 pm
content: Presumably you'd be able to let your frustrations out and tell this thing to go get F***ed, and not get arrested for it, as you'd not be insulting an actual officer.Fun!Dave.

author: saturation
author_rank: Super Contributor
timestamp: August 21, 2012, 01:57:53 pm
content: If this is based on physiologic responses to questions, just take an anti-anxiety medication or get tipsy with a few shots of alcohol 1/2 hr before facing the machine and it will suppress a lot of cues.

author: olsenn
author_rank: Frequent Contributor
timestamp: August 21, 2012, 02:06:20 pm
content: QuoteHow dare you... that machine is the best officer in the force!QuoteThe best way to trick the robot into thinking you're not bringing drugs over the border is to be on drugs when you cross over the border.Robot: Are you carrying any unlicensed or illegal items, such as weapons, drugs, unchecked organic material, or unauthorized persons?You: YesRobot: I have determined you are telling the truth; you may pass.

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 21, 2012, 02:42:18 pm
content: stick something in his jtag port
Meeting People in the Field  - Page 1
Forum section: electronics / general

author: Unclegummers
author_rank: Contributor
timestamp: August 13, 2012, 02:32:28 am
content: I'm feeling electronically lonely!Anyone out there know a good way to meet people in the field? (More experienced than me)I'm going to graduate from college in an electronic engineering technology program this winter (Aussy summer.)People see my projects and think I'm CRAZYTired of doing this stuff completely alone!The job I have is mostly related to fiber optic cable maintenance and repair. Let's just say I'm outside most of the time. Those guys don't give a shit.

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 13, 2012, 03:07:58 am
content: Is there a "hackerspace" or equivalent in your area? If so, that should be your first stop.I can tell you that college is just too theoretical...

author: Unclegummers
author_rank: Contributor
timestamp: August 13, 2012, 03:36:23 am
content: Quote from: NiHaoMike on August 13, 2012, 03:07:58 amIt's better than some. I think its just too short of a program to incorporated anything that's highly technical and practical.In my final semester there is going to be a bunch of project classes. My teachers have been helpful, but not someone I would call up for advice.

author: dcel
author_rank: Regular Contributor
timestamp: August 13, 2012, 03:51:26 pm
content: Where are you located?Chris

author: Unclegummers
author_rank: Contributor
timestamp: August 15, 2012, 09:34:57 pm
content: Quote from: dcel on August 13, 2012, 03:51:26 pmWinnipeg in Canada

author: Jimmy
author_rank: Regular Contributor
timestamp: August 15, 2012, 11:26:09 pm
content: http://www.skullspace.ca/This link will change your lifelet us know how you get on

author: Unclegummers
author_rank: Contributor
timestamp: August 21, 2012, 02:13:48 am
content: Amazing. That's right beside my college..Thanks Jimmy!
Money Money All The Time What A Devouring Greed  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 20, 2012, 05:32:00 pm
content: makes for some very disturbing reading Surfthechannel Criminal Conviction Driven By Hollywood Money -- Not The Governmentmore shocking is Crown even think their taking the piss so beggars the question why did aid and abet them, its not like they haven't been tricked by these rouges before.nether can i remember any other private corps getting the special treatment i mean i bet there a few that love to be able to things like thishttps://www.techdirt.com/articles/20120820/01553920095/horrifying-surfthechannel-criminal-conviction-driven-hollywood-money-not-government.shtml
Has anyone got access to (or owns) a 3d scanner? - Page 1
Forum section: electronics / general

author: djsb
author_rank: Super Contributor
timestamp: August 19, 2012, 01:54:37 pm
content: I'm trying to get a small metal part for my motorcycle scanned. Does anyone know of a reputable low cost service where I can get this done? This placehttp://3dscanningservices.co.uk/index.htmlCan't do it because the bracket is less than 20mm high.I have made a request on the David Laser Scanner forum herehttp://www.david-laserscanner.com/forum/viewtopic.php?f=7&t=4859So hopefully it will get a response in a few weeks (it's very slow).When it is scanned I can import the model into Alibre design, modify it and get a 3d printed prototype done at shapeways.Can anyone help?Thanks.

author: bilko
author_rank: Frequent Contributor
timestamp: August 19, 2012, 02:08:36 pm
content: Why do you need it scanned, are you thinking of making thousands of copies ?It is only a pressing from a flat sheet, it would take a reasonable engineer less than two hours to make it with basic tools.

author: Mechatrommer
author_rank: Super Contributor
timestamp: August 19, 2012, 02:17:37 pm
content: a steel ruler, digital caliper and AutoCAD are all you need, so you dont have to scan the rust.

author: djsb
author_rank: Super Contributor
timestamp: August 19, 2012, 02:21:41 pm
content: I'm not going to make identical copies of it, no. I want to use part of the bracket and combine it with another part I will create in Alibre. I'd fabricate it myself in sheet steel if I had a small workshop. I'd have to have a design to give to a metalworker anyway and Alibre can flatten out a 3d model so that it can be cut from sheet and bent. The original was produced by stamping which used some kind of mold or jig.

author: djsb
author_rank: Super Contributor
timestamp: August 19, 2012, 02:25:16 pm
content: Quote from: Mechatrommer on August 19, 2012, 02:17:37 pmI'm just lazy. I might have to do it that way in the end. Just like the idea of using a scanner and getting the practice with Alibre (similar to AutoCAD but a lot cheaper).

author: Galenbo
author_rank: Super Contributor
timestamp: August 19, 2012, 07:40:58 pm
content: I once made a 3D scanner with a webcam and some programming.Due to the lack of a laser line, with undercut.But this won't be of your intrest. Just in search of an off-the-shelf inefficient hyped method?

author: bobhaha
author_rank: Contributor
timestamp: August 19, 2012, 11:43:08 pm
content: Have you thought about trying a free 3D modeler software, that automatically creates the model from a series of images?There are many free ones.. I have used one in the past and it works quite well.-Adrian

author: djsb
author_rank: Super Contributor
timestamp: August 20, 2012, 08:13:37 am
content: I was looking at the my3dscanner website but all the caveats to getting a succesful scan put me offhttp://www.my3dscanner.com/index.php?option=com_k2&view=item&id=54:a-must-read-top-8-mistakes-of-our-users&Itemid=72I'll keep trying and let you know of any progress.
Robrenz, meet your nemesis - Page 1
Forum section: electronics / general

author: IanB
author_rank: Super Contributor
timestamp: August 19, 2012, 11:47:04 pm
content: Make tools so you can make better tools so you can make cool stuff:I really like when machine precision meets wood

author: Unknown
author_rank: Unknown
timestamp: August 20, 2012, 12:45:32 am
content: no, not really, Mathias Wandel is more like a school paper poetwhereas our robenz is more like a novelist

author: robrenz
author_rank: Super Contributor
timestamp: August 20, 2012, 12:49:11 am
content: Very nicely done. Like this fellow I just want to encourage/inspire people to realize what can be done and share some techniques that may help spark a desire to try making stuff. Thanks for sharing this.
Happy Eid dul Fitr Celebration Day - Page 1
Forum section: electronics / general

author: Mechatrommer
author_rank: Super Contributor
timestamp: August 19, 2012, 04:12:02 pm
content: wishing all fellows around the globe Happy Eid dul Fitr Day. May your fasting be accepted

author: Jad.z
author_rank: Regular Contributor
timestamp: August 19, 2012, 05:44:41 pm
content: Hi Mechatrommer, happy Eid.How do you celebrate the occasion?

author: sorin
author_rank: Frequent Contributor
timestamp: August 19, 2012, 08:19:55 pm
content: Happy Eid dul Fitr day!

author: Mechatrommer
author_rank: Super Contributor
timestamp: August 19, 2012, 09:23:39 pm
content: Quote from: Jad.z on August 19, 2012, 05:44:41 pmvisiting close relatives and families, wear better dress, and eat foodsbut as i have many other obligation, i usually cannot accomplish all esp visiting relatives.
Conflict Minerals  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 18, 2012, 04:14:18 pm
content: title says it all hype or FUD not discounting of course but saying electronic is responsible for ithttp://www.enoughproject.org/conflict-minerals

author: Simon
author_rank: Unknown
timestamp: August 18, 2012, 09:28:14 pm
content: sounds a bit superficial to me. Same old story, its all the fault of the west and we have to sort the world out. They suddenly forgot diamonds that fund wars and buy illegal weapons.I'd give as much lip-service to that first link as i gave to the guy claiming that it was more environmentally friendly to drive than jog....

author: M. András
author_rank: Super Contributor
timestamp: August 18, 2012, 09:31:32 pm
content: i dont get why they blame the electronics industry for mindless locals? why dont blame the russians or the americans who sold them the weapons?

author: SeanB
author_rank: Super Contributor
timestamp: August 19, 2012, 06:07:37 am
content: That means they are then having to be responsible for their actions. Better to blame somebody else and ask for a handout to perpetuate the cycle.

author: G7PSK
author_rank: Super Contributor
timestamp: August 19, 2012, 08:37:24 am
content: Quote from: M. András on August 18, 2012, 09:31:32 pmSold them! Gave them! In order to fight left right war by proxy more likely.

author: dcel
author_rank: Regular Contributor
timestamp: August 19, 2012, 10:19:59 am
content: I call bullshit!The United States Geological Survey reports in its yearbook that the Congo produced a little less than 1% of the world's tantalum output.Most of the Tantalum is produced in 1-Australia, 2-China, 3-Canada, 4-Brazil....Australia actually shutdown one of its several mines because of the flooded tant market.I read somewhere that China was going to cut back the export of tantalum and keep it as a strategic reserve. In that same article, there is a mine in California that was to reopen for tant and other rare-earth metals that China has decided to keep for themselves.Its just a ploy to raise a stink about nothing and blame the problem on the Iphones of the world.You bet if they are the one who needs a medical device ( hip joint or other implantable prosthetic) made from rare earth metals ( titanium coated with tantalum), they would change their mind re-guarding 'conflict minerals'.Chris
Uses for old RF Filter? - Page 1
Forum section: electronics / general

author: prenato
author_rank: Regular Contributor
timestamp: August 18, 2012, 11:26:19 pm
content: Today I ran across a "garage sale" for an older radio-ham guy. It looked as if he was getting rid of his electronics components gathered over many years. One man's trash is another man's treasure as they sayOne of the items I got from him, pretty much free, were these RF filters (see photo below). I'm not much of an RF guy so was wondering if anyone in the forum knows what these are used for and, perhaps more importantly, what could I use them for in my projects?I suspect this is some sort of "common-mode" choke to prevent the RF from interfering with normal electronics operation? Would it be any good as a mains filter for other purposes, say a very clean linear power supply design? Feedback appreciated.Paulo

author: SeanB
author_rank: Super Contributor
timestamp: August 19, 2012, 06:00:26 am
content: Mains filter, similar to that in any power supply. Only issue is that the capacitors inside may have self healed to nothing, as it is 43 years old. Do not take it apart, the oil inside is toxic, and if the seals are leaking wrap in plastic and place in the round filing cabinet.They are udes to reduce RF noise from entering or leaving equipment, and have a moderate effect. They work well in switching supplies to reduce the noise it sends up the mains.

author: prenato
author_rank: Regular Contributor
timestamp: August 19, 2012, 06:14:42 am
content: Thanks Sean. 43 years old? Boy, it is older than I am:) Good thing these were almost free.
Guy From Daveland Building Titanic 2 In China  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 25, 2012, 09:32:52 pm
content: http://www.bbc.co.uk/news/world-asia-19355950

author: tom66
author_rank: Super Contributor
timestamp: August 25, 2012, 10:00:22 pm
content: I hope it doesn't sink. Because that would be unlucky.

author: HardBoot
author_rank: Regular Contributor
timestamp: August 25, 2012, 10:04:01 pm
content: I wish Titanic 2 was a good looking nuclear powered warship, not a lame clone.

author: ablacon64
author_rank: Frequent Contributor
timestamp: August 26, 2012, 12:23:20 am
content: I think he had no idea of what to do with his money... kkkkk... Man I need a friend like that! heheheh... Also a new lab!

author: Psi
author_rank: Super Contributor
timestamp: August 26, 2012, 12:41:36 am
content: I think it will be awesome, i'd take a cruse on it in a second.More info herehttp://en.wikipedia.org/wiki/Titanic_II

author: SeanB
author_rank: Super Contributor
timestamp: August 26, 2012, 06:10:05 am
content: Just do not sail it near Greek islands or icebergs.............

author: GeoffS
author_rank: Unknown
timestamp: August 26, 2012, 10:28:55 am
content: As long as this one doesn't have Leonardo DiCaprio and Kate Winslet in it ...

author: dda
author_rank: Contributor
timestamp: August 26, 2012, 11:12:24 am
content: Quote from: ablacon64 on August 26, 2012, 12:23:20 amI would imagine this is the first time this has been said about Clive Palmer.

author: saturation
author_rank: Super Contributor
timestamp: August 26, 2012, 12:45:51 pm
content: Hmmm, same as the original except for safety? So it will use Marconi wireless, flares, incandescent light bulbs? It will have bunk beds in 3rd class and open flame stoves for cooking? Clearly, 1900 technology isn't going to be safe compared to 21st century technology, so effectively the 'copy' will be mostly superficial: decor and the ship's appearance, not its functionality, that would make it more to 50% 'original'.

author: notsob
author_rank: Frequent Contributor
timestamp: August 26, 2012, 01:16:15 pm
content: yeah, if clive sailed past the sirens, they would put on blindfolds and tie themselves to the rocks

author: Unknown
author_rank: Unknown
timestamp: August 26, 2012, 01:55:33 pm
content: Quote from: notsob on August 26, 2012, 01:16:15 pmNot from Australia.Clive P is a Queenslander, nothing to do with Australia! Queensland was sold to the Asians over the last decade. See updated map attached.

author: madires
author_rank: Super Contributor
timestamp: August 26, 2012, 02:23:45 pm
content: Quote from: Uncle Vernon on August 26, 2012, 01:55:33 pmAh, that explains a lot! :-)