hybridfree/eevblog-posts huggingface dataset:
We just don't get lightning like this in little old NZ - Page 1
Forum section: electronics / general

author: Mr.B
author_rank: Unknown
timestamp: July 03, 2015, 07:02:10 am
content: Manchester a couple of days ago.http://www.manchestereveningnews.co.uk/news/greater-manchester-news/manchester-lightning-storm-thunder-pictures-9569812Teaser:

author: Artlav
author_rank: Frequent Contributor
timestamp: July 03, 2015, 07:15:11 am
content: Neat.Here is one from the other side of the pond (west coast of Chile):

author: Mechanical Menace
author_rank: Super Contributor
timestamp: July 03, 2015, 09:59:41 am
content: You do realise "little old NZ" has twice the land England does?Around here we only really got sheet lightning that night, but we did get hale like this

author: Psi
author_rank: Super Contributor
timestamp: July 03, 2015, 10:18:00 am
content: We do get lightning on some occasions. The Auckland skytower gets hit quite often.But it's never fork lighting

author: SeanB
author_rank: Super Contributor
timestamp: July 04, 2015, 04:36:44 am
content: Took this off a DV frame in 2007. This blew up a fuel storage tank in the refinery.

author: GreyWoolfe
author_rank: Unknown
timestamp: July 04, 2015, 01:34:01 pm
content: Lightning like these images is fairly common here in Florida. At the first sound of thunder, I disconnect the coax from my ham radio gear because I have seen lightning bolts strike the ground when the sky was still clear ahead of the storm. The cloud to cloud lightning at night is especially beautiful.

author: Macbeth
author_rank: Super Contributor
timestamp: July 04, 2015, 02:54:08 pm
content: Impressive stuff from Florida there! We only had a bit of sheet lightning last night in Liverpool, UK.The best forked lightning I have ever witnessed was at Sorrento in Italy. Now if only Vesuvius would have erupted we would have been in for a treat.Nothing beats volcano lightning!
VW Golf Assembly Robotics and Automation - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: July 10, 2015, 01:15:04 am
content: Cool video. It's in German but interesting to watch.The level of robotics and automation is impressive.

author: Halcyon
author_rank: Unknown
timestamp: July 10, 2015, 02:38:27 am
content: Very impressive. Although I'd like to know why their cars seem to be getting increasingly more unreliable.I've got 3 friends who have new Golf's and each have had engine or gearbox issues. I also owned a brand new Amarok from new which also had gearbox problems (2 new gearboxes under warranty and the issue still wasn't resolved -- Gave up and traded it for a Toyota Hilux instead).

author: miguelvp
author_rank: Super Contributor
timestamp: July 10, 2015, 02:59:06 am
content: All I've heard was, chassis, transport, chassis, transport, chassis, transport.... 600V on chassis, transport, chassis, transport... oh, and a couple of VW mentions as well as Golf. Edit: Oh and automated, and assembly. And I forgot, quality and one mention of the airbag.But pretty cool.

author: calexanian
author_rank: Super Contributor
timestamp: July 10, 2015, 03:01:07 am
content: Great video. In response to the person who mentioned problems. I have a Jetta TDI with 67,000 miles and have not had a single problem. It was made in Mexico. My father has a 14 Passat 1.8 turbo assembeled in the U.S. and has no problems either. We are both very happy with them. Comparing anything to a Hilux, or what we call a Tacoma here in the U.S. (If ours was Diesel like the rest of the world can have and not gas i would be there buying one now!) is a but harsh. As top gear proved (Even though it was obviously cooked for television) they are made of pure neutron star and cannot be destroyed!
Voice Recorders - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: July 04, 2015, 07:30:11 am
content: I'm having lots of problems trying to work with a series of voice recorders made by a company called ISD/Nuvoton. What doesn't help is that technical support for the hobby market does not exist, they are only willing to talk to companies.So, last night I was thinking about building my own. Take a low specification ADC that can do 8000*** conversions a second, drive it with a PIC and save the results in flash memory. For output read the flash then output through a DAC. It can't be THAT simple, can it? Or am I missing something?*** Most speech is between 300 Hz and 3000 Hz, double this due to Nyquist and add a fiddle factor.

author: electr_peter
author_rank: Unknown
timestamp: July 04, 2015, 07:39:15 am
content: Do you have analogue band pass filter for 300 - 3000 Hz range? If not, result will be of very low quality with 8 kHz sampling rate.Also, getting microphone sensitivity and gain right will be problem, you do not want signal to overflow in digital domain.

author: fcb
author_rank: Super Contributor
timestamp: July 04, 2015, 08:14:44 am
content: As electr_peter says, you will need a low pass filter (LPF), it should have a reasonable roll-off (better than 1st order), but you don't need to go mental.Another way of doing it is to run the ADC at a higher sample rate (perhaps 32KHz) and then average the results of say 4 samples, this effectively creates an LPF and you could then get away with a more basic filter (or no filter at all).You could use the ADC built into many PIC's (8/10/12bit), and experiment with uLAW (mu law) encoding, or as memory is cheap, just record a greater bit depth. As for DAC, you could use an external one, build one from a parallel port of a PIC or even use PWM (I did a wearable project at the end of 2014 that had a dsPIC33FJ128GP202 in it, for speech playback I used a simple RC filter on a 48KHz PWM output and ran the audio at 8000 samples, I created an simple interpolator that calculated 5 missing steps between samples - it sounded fine).Have fun experimenting!!

author: nctnico
author_rank: Super Contributor
timestamp: July 04, 2015, 09:19:54 am
content: How about a cheap smartphone + app?

author: German_EE
author_rank: Super Contributor
timestamp: July 04, 2015, 01:12:56 pm
content: The idea is to build the voice recorder into a ham radio transceiver, a voice band filter is therefore already build in to the microphone circuits as is some AGC to ensure a reasonably constant level of signal - ideal for feeding into an ADC.After I sent the post I suddenly remembered CODEC chips where an ADC and a DAC are on the same chip. Fine, that's one less thing to worry about, but I am not sure about memory (see later post)
The AI Revolution - An interesting read - Page 1
Forum section: electronics / general

author: BennVenn
author_rank: Regular Contributor
timestamp: July 03, 2015, 12:34:26 am
content: If you find yourself with a spare half hour or so, take a look at thishttp://waitbutwhy.com/2015/01/artificial-intelligence-revolution-1.htmlA brief overview of AI, where it's at and where it is going.
FYI: BTTF marathon on AMC - Page 1
Forum section: electronics / general

author: Stonent
author_rank: Super Contributor
timestamp: July 02, 2015, 12:43:24 am
content: They're calling it the Back to the Back to the Back to the Future marathon.It's on right now.

author: Stonent
author_rank: Super Contributor
timestamp: July 02, 2015, 02:58:55 am
content: Eat lead, slackers!!
Coupons on Aliexpress $1 for a $50 coupon - Page 1
Forum section: electronics / general

author: ninjastrike
author_rank: Contributor
timestamp: August 18, 2014, 11:30:26 am
content: Hey,Found some sort of deal on aliexpress(time sensitive)http://activities.aliexpress.com/the-seven-seas-sale.phpTerms and conditions(please read)http://activities.aliexpress.com/discountcouponrules.php?spm=5261.1197721.1998061629.23

author: sleemanj
author_rank: Super Contributor
timestamp: August 18, 2014, 11:43:30 am
content: Note;5. Use of Coupons:a) Each type of coupon you purchased at a discount can only be used on August 19, 2014 from 00:000:00 PST to 23:59:59 PST for the following transactions at AliExpress Marketplace:Type of AliExpress Coupons (US$) Eligible Uses$50 A single transaction over US$199 at AliExpress Marketplace.$20 A single transaction over US$69 at AliExpress Marketplace.$30 A single transaction over US$99 at AliExpress Marketplace.$120 A single transaction over US$399 at AliExpress Marketplace.$200 A single transaction over US$599 at AliExpress Marketplace.

author: dimcev
author_rank: Newbie
timestamp: April 26, 2015, 03:31:06 pm
content: I take the coupons here - 99off.net, there are many interesting coupons.

author: EEVblog
author_rank: Unknown
timestamp: July 01, 2015, 01:04:44 pm
content: Quote from: sleemanj on August 18, 2014, 11:43:30 amThey are betting that many people will buy them and forgot. In fact they probably have stats on it and can practically guarantee it.

author: EEVblog
author_rank: Unknown
timestamp: July 01, 2015, 01:08:38 pm
content: Quote from: dimcev on April 26, 2015, 03:31:06 pmInteresting that two spam messages like this popped up on the thread immediately.Must have been dormant accounts that sat around waiting for the "coupon" keyword trigger.Never seen this before.

author: Halcyon
author_rank: Unknown
timestamp: July 01, 2015, 07:22:41 pm
content: Quote from: EEVblog on July 01, 2015, 01:08:38 pmIs that like the game people used to play as a kid where you say someone's name three times in front of a mirror and summons them from the dead? Maybe you're invented a magic genie lamp of sorts Dave? ;-)Coupon, coupon, coupon.... damn didn't work.
New Horizons Pluto Mission. Geeting close, 12 days to closest approach. - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: July 01, 2015, 12:52:41 pm
content: http://pluto.jhuapl.edu/index.php

author: deephaven
author_rank: Frequent Contributor
timestamp: July 01, 2015, 12:57:03 pm
content: Looking forward to this
e-tax 2015 Download Links (Australia) - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: July 01, 2015, 06:30:05 am
content: It seems the ATO website is a complete shambles. Some users are reporting intermittent "We are improving this page" or "Coming soon" messages. For those of you who are having trouble downloading e-tax 2015, direct links to the software are as follows:Windows version:https://www.ato.gov.au/misc/downloads/managed/etax2015/etax2015_1.msiApple version:https://www.ato.gov.au/misc/downloads/managed/etax2015/etax2015_1.dmgIf you get timeouts, just try again (it seems their link is getting hosed). I had to retry a few times after getting "Service unavilable" messages, but it did download eventually.The download links are also accessible via:https://www.ato.gov.au/Individuals/Ind/Downloading-and-installing-e-tax/but for some reason this page is buried somewhere deep in their homepage, for the time being anyway. (You can also verify the site certificates via that page before downloading.)
OT Don't open door while in car wash. - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: July 03, 2015, 01:36:33 am
content: What worries me more is that morons like that guy are being allowed to drive on public roads!

author: Falcon69
author_rank: Super Contributor
timestamp: July 03, 2015, 02:42:24 am
content: Well, He had to get that ticket off the windshield before the water hit it to see when the court date was. Otherwise, he'd have a warrant for his arrest if he missed that court date. He's a handsome man and would be well liked in jail with that purdy mouth.

author: GreyWoolfe
author_rank: Unknown
timestamp: July 03, 2015, 12:27:58 pm
content: Quote from: Halcyon on July 03, 2015, 01:36:33 amNot even close, the worse part is that they breed and make more.

author: sync
author_rank: Frequent Contributor
timestamp: July 03, 2015, 12:43:54 pm
content: Quote from: Falcon69 on July 03, 2015, 02:42:24 amReally? What if the ticket get lost/removed by someone else?Here the ticket on the windshield is for information only. You will get a official letter afterwards.

author: BradC
author_rank: Super Contributor
timestamp: July 03, 2015, 12:45:43 pm
content: Quote from: GreyWoolfe on July 03, 2015, 12:27:58 pmProcreation favors the stupid.

author: Falcon69
author_rank: Super Contributor
timestamp: July 03, 2015, 08:41:40 pm
content: well, yes, he would get something in the mail in a couple weeks notifying him of the citation and court date. However, my bet is that since this video came out, he was sooooooo embarrassed that he moved to a different neighborhood where noone knows him and didn't even tell the mail guy he moved in fear the mailman would make fun of him at his new place. So, the Citation Notification that normally would be mailed to him, got returned as undeliverable mail and he wouldn't have known the court date. So my original statement stands!
Back to the future remake plans - Page 1
Forum section: electronics / general

author: Zman
author_rank: Contributor
timestamp: June 30, 2015, 10:00:45 am
content: huge off-topic, sorry!...but since this is David's favorite movie I thought I can post it here:Robert Zemeckis, who directed the film and its two sequels, has vowed that Back to the Future will never be remade in his lifetime – and hopes that his estate will figure out a way to continue blocking remakes after his death.full story:http://www.telegraph.co.uk/film/back-to-the-future/remake-sequel-robert-zemeckis/

author: Zman
author_rank: Contributor
timestamp: June 30, 2015, 10:09:37 am
content: OMG, I did not notice the other topic!please remove this
Cool Tesla drivetrain reverse engineering - Page 1
Forum section: electronics / general

author: MacAttak
author_rank: Unknown
timestamp: June 27, 2015, 01:25:52 am
content: I've been MIA from these forums for a while (VERY busy with work lately), so please forgive me if someone has already posted this. I did a few searches on the forums and didn't see anything about it...Today I ran across this video that talks about reverse-engineering the power inverter of a Tesla drivetrain (technically not a Model S, but from a Mercedes B which is roughly the same hardware). Nothing really earth-shattering, but I thought it was interesting from a power electronics standpoint. The engineering on that inverter is fantastic.

author: benst
author_rank: Regular Contributor
timestamp: June 29, 2015, 11:35:08 pm
content: Very cool, thanks for sharing.Ben

author: HighVoltage
author_rank: Super Contributor
timestamp: June 30, 2015, 07:08:09 am
content: Thank you for this video, this was some great insight !
Forum Suggestion - not sure where to post? - Page 1
Forum section: electronics / general

author: Chanc3
author_rank: Frequent Contributor
timestamp: June 29, 2015, 12:28:46 pm
content: Hello allPosting here as I couldn't find a specific forum to post in (the suggestion subforum seems to be for the blog only).Basically, I think it would be useful to have a "Thermal Imaging" sub forum under testing, as it is obviously becoming a very popular topic and digging around the testing posts is quite tiresome!

author: Halcyon
author_rank: Unknown
timestamp: June 29, 2015, 07:21:22 pm
content: I'd love to see a Vintage Computing section as on any given page, there are at least 1-2 posts regarding computing or old computers.
[UK] Computer museum seeking BBC Micro engineers - Page 1
Forum section: electronics / general

author: nali
author_rank: Frequent Contributor
timestamp: June 29, 2015, 11:27:56 am
content: I thought it may worth mentioning on here...http://www.bbc.co.uk/news/technology-33291036A public appeal for people who can repair BBC Micro computers has been launched by a museum.The National Museum of Computing (TNMOC) needs help to maintain the stock of BBC machines it uses in education programmes and exhibits.It is looking for people familiar with the computer and its peripherals including monitors and disk drives.The 8-bit BBC Micro was launched in 1981 and gave many people their first taste of home computing[snip remainder]

author: Fred27
author_rank: Unknown
timestamp: June 29, 2015, 12:57:48 pm
content: I'd better not apply. I destroyed mine with the classic "didn't realise the oscilloscope probe was grounded" error when I was about 13. Luckily the 'scope I'd borrowed from school wasn't damaged.

author: Tandy
author_rank: Frequent Contributor
timestamp: June 29, 2015, 01:19:13 pm
content: They are just up the road from me so I have offered to lend a hand but I expect they will get inundated with offers having been mentioned on the BBC.

author: Kjelt
author_rank: Super Contributor
timestamp: June 29, 2015, 05:48:32 pm
content: How long will there be parts left to service these.Better score some NOS parts while they can.

author: Fraser
author_rank: Super Contributor
timestamp: June 29, 2015, 06:17:32 pm
content: @Tandy,Where you located ?I am just to the North Of Milton Keynes, so also close to B.P.I used to repair 8 bit micros but I can't say I would want to do a lot of that work as I prefer RF equipment. I was going to help the Station X part of Bletchley Park with their Diplomatic Wireless exhibition but sadly had to reconsider when the new 'top man' deleted it from the attractionsFortunately Milton Keynes contains many technology companies and I feel sure there will be plenty of volunteer help for the Computing Museum if they really need it. A retired colleague of mine already helps them on the computer support front. A worthwhile cause. I just hope the Station X chap does not continue to mess things up for them.Aurora

author: Tandy
author_rank: Frequent Contributor
timestamp: June 29, 2015, 07:52:48 pm
content: I'm in Oxford.I remember first going to Bletchley Park many years ago, when the computer museum was called BeeBop. I gave them an IBM Convertible, a fairly rare early IBM laptop. There used to be a guy in one of the huts with lots of early radios I don't think that is there any more is it?
Problem with eevblog forum NEW function - Page 1
Forum section: electronics / general

author: zapta
author_rank: Super Contributor
timestamp: June 27, 2015, 04:48:37 pm
content: I have this problem for a few months now. When I click on the NEW button next to a thread title it takes me to the first post in the thread instead of the first one that I haven't read yet. It used to work for me before but now it consistently taking me to the head of the thread, even though I am logged in and have a post later in that thread.Does it work for you? Any suggestion how to fix it?I tried to clear *eevblog.com cookies but it doesn't help.(I am using Chrome if it matters. No problem with Tapatalk).

author: SeanB
author_rank: Super Contributor
timestamp: June 27, 2015, 05:27:39 pm
content: No problems with me, using Firefox. Do you mark all as read at times? This might be the issue.

author: zapta
author_rank: Super Contributor
timestamp: June 27, 2015, 05:28:46 pm
content: Quote from: SeanB on June 27, 2015, 05:27:39 pmI never mark as read, just opening and reading, this is also what I did in the past when it used to work.
Power for free the real way....... - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: June 27, 2015, 08:32:18 am
content: Anybody care to translate, as the YT auto translate mangles Russian quite badly.......Long line, high voltage power line nearby and light and radio in the home for free, using old electronics and some scrap to do it.

author: Psi
author_rank: Super Contributor
timestamp: June 27, 2015, 08:40:07 am
content: Because a 20kHz flyback transformer will obviously work at 50hz and only 1 wire.

author: SeanB
author_rank: Super Contributor
timestamp: June 27, 2015, 08:56:09 am
content: Have you looked back and seen his microwave experiments, or the method to get worms for fishing.......

author: george graves
author_rank: Super Contributor
timestamp: June 27, 2015, 10:43:34 am
content: I think this is an old wives-tale. (nice video - glad to see Russia has after effects/CGI now!)The original story went something like this.....So the power company demanded that they put in huge high tension power lines across a farmers field. He protested, but "eminent domain" prevailed. The lines happened to run right past his barn. So he did what any farmer would do. He pulled out his mile long spool of copper wire (like every farmer has a mile of copper sitting around - but for the general public, it's plausible) and wrapped his barn in copper. And then started stealing power from the power company! Untill the "man" shut him down.BTW - I forget is magmatic field the inverse cube of distance, or the inverse square? - anyways - that barn would have to been right up next to them big old power lines.

author: dexters_lab
author_rank: Unknown
timestamp: June 27, 2015, 07:40:14 pm
content: been subbed to kreosan for a while, i do like his adventures, but i have wondered if there is some, erm... artistic licence in some of his videos?they certainly like sound effects

author: Towger
author_rank: Super Contributor
timestamp: June 27, 2015, 07:58:48 pm
content: It does not take much to light fluorescent tubes. I used to do it as a kid just wrapping cheap RG58 around one connected to a standard 4 watt CB radio.

author: lapm
author_rank: Frequent Contributor
timestamp: June 28, 2015, 01:14:32 am
content: Didnt Mythbusters do episode about this and even they with Hollywood tech could not get it to work in level where you could even charge phone with it...

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 28, 2015, 02:47:27 am
content: One story I heard was when someone soldered a hook to one end of a fluorescent bulb and then used a R/C helicopter to hang it on a power line right outside the bedroom window of someone he wanted to seek revenge on.
CTIA inline remote control protocol(s) and vendor-specific extension? - Page 1
Forum section: electronics / general

author: linux-works
author_rank: Super Contributor
timestamp: June 27, 2015, 08:52:42 pm
content: anyone here familiar or experienced in this stuff?I'm talking about the TRRS small size headphone jack that has a 4th band for remote control. I've read here:http://www.wisebread.com/build-a-cable-to-control-your-android-phone-while-you-driveand other places that its resistance based for some functions and 0 ohms to gnd for play/pause. I have an android earbud cable that has this function and also a base noise cancelling cable that does this, as well.here's where I'm a little confused; I tried using this cable on a player I recently bought (Fiio x3-II) and that claims to have ctia remote ability. ok, fine, go to its config menu (on the audio player), enable the remote control option and lets see what happens. I plug the cable with the 4 bands into the phones-out jack and press buttons. the pause/play button does actually toggle those modes, so that's great. but skip back and forward don't do anything.then, just while trying random stuff, I multiclicked on the pause button. that changed songs! lets try some variations, 2 clicks and 3 clicks. yup, that skips one way and the other way. that's the 4 functions, but they are overloaded on the play/pause 0ohm-to-gnd band (or button) and the restance-based style does not seem to be supported by this player.has anyone seen this before or know if this is just a vendor-strangeness thing? I just happened to figure this out by trying multiclicking and I'm not even sure what made me do thatI can now create some small controller that will receive my command and translate to multi-tap stuff, but it just seems strange that they'd do it this way on the player and become incompatible with, what seems to be a standard that uses R values and not pulses on a single band.I have not tried to contact the vendor yet, but curious if anyone has seen this or tried to work with this inline remote stuff before.
The Zeptobars Explain This Transistor To Me Challange - Page 1
Forum section: electronics / general

author: JoeN
author_rank: Frequent Contributor
timestamp: June 29, 2015, 05:21:47 am
content: First, check out the latest microscope image Zeptobars came up with:http://zeptobars.ru/en/read/BFG135-NPN-7GHz-RF-BJTNow, there are three terminals here. Let's call them left, middle, right. Middle and right seem to be connected. So what terminals are what? My wild guess is left is emitter and middle is base. Is that right? If so, right is base too - and it doesn't look like anything was soldered there anyway. So the collector is tied to the substrate? And why two bases? Is it so that two different devices with different base characteristics can be made from one die - just bond the wire to a different pad?Anyway, it's interesting to me. I don't know anything about semiconductor fabrication. Tell me what is going on here if you do and are to take the time. Zeotobars never explains what is going on, even on three terminal devices where I think it is probably possible to give an explanation.

author: rs20
author_rank: Super Contributor
timestamp: June 29, 2015, 05:45:52 am
content: QuoteSo, we know that there are resistors on the emitter, and the thicker wire in the middle tells me that's the emitter. The comment about tells us that the parts are spread out to minimize collector resistance; which tells us that the collector is the substrate. I guess the two pads on the emitter are to allow two bond wires for reduced lead resistance? And the left is the base by deduction.
Kickstarter: "Power your phone via WiFi" - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: June 21, 2015, 11:22:28 am
content: I know Dave has already done similar a similar video or two in the past, but really, more "free energy" stuff?https://www.kickstarter.com/projects/nikolalabs/nikola-phone-case-power-your-phone-with-wasted-eneI'll leave it up to the real EE's to discuss, calculate and inform. I look forward to the data :-)

author: German_EE
author_rank: Super Contributor
timestamp: June 21, 2015, 12:44:48 pm
content: Just a thought, if you enclose your phone in one of their special cases so that it can collect the RF energy how will the phone get a signal? Anyway, Dave has debunked this one ages ago and I seem to remember the charging time was longer than the lifetime of the user.

author: tom66
author_rank: Super Contributor
timestamp: June 21, 2015, 01:00:42 pm
content: How stupid are the backers?Are they sheep? There have been SO MANY of these kickstarters that have never delivered. So many "startup" companies (RCA Airnergy, uBeam, etc) - never delivered anything. I lose hope in people - seemingly unable to critically analyse this problem. Especially when people say, "oh you're not open minded, the laws of physics are human made, they can be broken".

author: amyk
author_rank: Super Contributor
timestamp: June 21, 2015, 01:04:34 pm
content: I misread the title as "Power your phone via WTF", which isn't too far off the mark...

author: gildasd
author_rank: Frequent Contributor
timestamp: June 21, 2015, 01:09:39 pm
content: WTF might work. Less power loss at a max of 12 inches, if its happy.After that it just pisses power away.

author: dexters_lab
author_rank: Unknown
timestamp: June 21, 2015, 06:46:09 pm
content: wow, someone stumped up $4k for a 50 pack!the comments section is making for some interesting reading

author: macro820
author_rank: Newbie
timestamp: June 26, 2015, 02:21:19 pm
content: Took 35 minutes to charge a cap enough to take a single picture. So maybe you could power your Casio? I wonder if having multiple access points would help.

author: LabSpokane
author_rank: Super Contributor
timestamp: June 26, 2015, 03:43:39 pm
content: They are deliberately attenuating the signal from the phone itself and supposedly feeding that energy back into the device. So all this case does is reduce the phone's signal strength, both coming and going. They may be electrical engineers(?) but they know exactly zip about fade margin.
Massdrop considering purchasing scopes - Page 1
Forum section: electronics / general

author: tyguy2
author_rank: Unknown
timestamp: June 26, 2015, 03:04:12 pm
content: So, for those of you who don't know,https://www.massdrop.com/how-it-works< This is Massdrop. They are great, I've purchase quite a few things from them. They recently started voting on entry level oscilloscopes:https://www.massdrop.com/vote/entry-level-oscilloscope?s=oscilloscopeI think this would be great for all the beginners constantly asking for scopes on the forums. If you're interested, vote!
DIY audio event coming up in the sf bay area (Sat October 17th, 2015) - Page 1
Forum section: electronics / general

author: linux-works
author_rank: Super Contributor
timestamp: June 25, 2015, 03:09:39 pm
content: http://www.diyaudio.com/forums/clubs-events/276291-2015-burning-amp-festival-saturday-october-17th.htmlshort descr from the event organizer:The Burning Amp Festival will be in Silicon Valley this yearInterana Headquarters, 3rd floor Evernote Building,305 Walnut St. 3rd floor, Redwood City, CA 94063 in Silicon Valley.Saturday October 17th, 2015, 10AM to 10PM ?This big new venue allows more listening rooms for many more systems to audition so we are asking exhibitors to demo their previous?ly built and shown DIY components along with their latest creations. We want DIY turntables, Tube amps, Pass amps, Self amps, Amps designed by your Self. Speakers of all types! I'll start another thread for organizing systems..Nelson Pass will present his latest breakthrough, plus 3 other presentations. Siegfried Linkwitz will demo his LS Studio Speaker system with miniDSP crossovers and Bruno Putzey's Hypex amps all day.(end quote)I always go to this when I can make it and its a full day of DIY fun. it does not have a commercial focus to it; its ALL about diy audio and new things the members have designed and built. some recognizeable names will be there, too, as always.fyi
free energy nitinol engine - Page 1
Forum section: electronics / general

author: hudion
author_rank: Newbie
timestamp: June 25, 2015, 11:49:14 am
content: hi can you tell me what you think of this Powerful Nitinol engine running on hot watercould the fan make make say 1 energy and could you get a small motor to heat up the water that would take 1 energy to run so you could run the fan for has long has a want toand what do you think of this video Free Energy Nitinol Heat Machines invented in the early 1970ty.

author: VK5RC
author_rank: Unknown
timestamp: June 25, 2015, 12:00:22 pm
content: Quote from: hudion on June 25, 2015, 11:49:14 amNo and No.The "laws of Thermodynamics" You Lose , you lose and you lose again!

author: hudion
author_rank: Newbie
timestamp: June 25, 2015, 02:15:54 pm
content: if you take the fan and say it can make 1 watt of enrgy to power a motor to keep the water hot it would take more than 1 watt

author: amyk
author_rank: Super Contributor
timestamp: June 25, 2015, 02:50:17 pm
content: "free energy" never is.

author: tom66
author_rank: Super Contributor
timestamp: June 25, 2015, 02:52:51 pm
content: All systems have efficiency losses.Motors are about 85-90% efficient at converting electrical energy into kinetic energy.Most thermodynamic engines (including internal combustion engines) do not exceed 40-50% efficiency.No system has greater than 100% efficiency, as that would violate energy conservation.Energy conservation is essential to modern physics and engineering. If energy conservation does not hold, a whole lot of theory that we think we know also goes out the window. The thing is, using energy conservation fits in with everything we know and it makes things work properly, for it to be wrong after finding so much else works when it is considered is unlikely. On the scale of, gravity being an illusion or atoms not existing etc. No free-energy device has been subject to scientific scrutiny and found to be producing net energy. Measurements of small energy levels can be difficulty.Certainly, I maintain if overunity is possible it will not come from playing with magnets. It will be something really esoteric, likely involving antimatter or dark energy, as they are poorly understood unlike something like magnets that have been understood for 300 years...

author: suicidaleggroll
author_rank: Super Contributor
timestamp: June 25, 2015, 02:59:29 pm
content: Quote from: hudion on June 25, 2015, 02:15:54 pmThe system works by extracting thermal energy from the water and turning it into kinetic energy to move the fan. You will never get more energy out of that fan than was extracted from the water. Putting a generator on the fan side and using the accumulated energy to heat the water would simply keep the water from cooling down as quickly as it would otherwise, but it will still cool down, and as soon as it got close enough to room temperature the system would stop working altogether.
Flux Capacitor USB Charger - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: June 28, 2015, 10:39:54 am
content: Yes!!!http://www.thinkgeek.com/product/1dbd/

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 28, 2015, 05:24:03 pm
content: Teardown and mod:http://hackaday.com/2015/02/17/great-scott-a-flux-capacitor-notification-light/
PITA Steals Encrpytion Keys - Page 1
Forum section: electronics / general

author: kfnight
author_rank: Regular Contributor
timestamp: June 24, 2015, 05:35:18 pm
content: http://www.engadget.com/2015/06/23/pita-radio-wave-hack/?ncid=rss_truncatedResearchers like to say it takes the energy of a billion sons to break something like AES, but it's a lot easier if you use something like this or social engineering techniques.

author: suicidaleggroll
author_rank: Super Contributor
timestamp: June 24, 2015, 05:55:58 pm
content: If a hacker can get this device within 19" of your processor, they're close enough to just plug in a keylogger and grab your password. As one of the comments on that site says:Quote

author: helius
author_rank: Super Contributor
timestamp: June 24, 2015, 06:16:09 pm
content: dynamic power analysis is nothing new, and is the reason you typically don't use general purpose processors for crypto in high security environments.

author: Deathwish
author_rank: Unknown
timestamp: June 24, 2015, 06:20:13 pm
content: Brought to you by the designers of stuxnet huh ? ........

author: JoeN
author_rank: Frequent Contributor
timestamp: June 25, 2015, 04:37:33 am
content: This has been around for a while, but obviously a good implementation of the ideas. Probably would be considered illegal in the US.https://en.wikipedia.org/wiki/Tempest_%28codename%29https://en.wikipedia.org/wiki/Van_Eck_phreaking
Rust on jaws of clamp meter - Page 1
Forum section: electronics / general

author: k3iroll
author_rank: Newbie
timestamp: June 24, 2015, 03:34:17 am
content: 1- Is rust on the jaws of clamp meter normal?2- How does it affect the measurement?3- How to remove the rust? What product are you using?

author: Fraser
author_rank: Super Contributor
timestamp: June 24, 2015, 10:58:55 am
content: If steel is used for the core, it can rust. No doubt about it.To clean it off just use ink eraser as that is more abrasive than a pencil eraser. I suggest you do not use more aggressive abrasive than this for minor corrosion. In serious corrosion cases you could use a very fine 'wet & dry' abrasive paper of >1000 grit. Let the clamp peter clamp down on it and then gently pull it back and forth through the jaws. Clean the jaw faces with IPA to remove and grit and residues.Whether the mild oxidation actually has a negative effect on the clamps performance ..... I doubt it, but have no experience of such with clamp meter designs.Aurora

author: k3iroll
author_rank: Newbie
timestamp: June 24, 2015, 01:05:42 pm
content: I believe all clamp meters are using steel core in order to produce electro-magnetic right?How do you maintain the bare metal surface of the jaw? Are you applying inhibitor oil, or it is being plated properly?

author: Stray Electron
author_rank: Super Contributor
timestamp: June 24, 2015, 06:22:00 pm
content: I've had a couple of clamp on amp meters that I picked up surplus that had a lot of rust on them. I checked them then cleaned off the rust and checked them again and got the same readings so I don't think rust (a reasonable amount) affects them.CLR cleans rust off pretty well but today I'd try one of the rust removers that leaves a phosphate coating on the steel.
Anybody used one of the cheap Ebay DC ATX PSUs? - Page 1
Forum section: electronics / general

author: Mechanical Menace
author_rank: Super Contributor
timestamp: June 24, 2015, 04:03:58 pm
content: I recently realised I have my main PC running almost all the time just for web browsing, text editing, and HTPC usage so I've been looking at getting a passively cooled mini ITX system with an integrated CPU to cut down on noise and energy use. So I thought this would be a perfect time to get rid of an inverter and get a DC PSU for the new system. After a quick search I came across an awful lot of these:http://www.ebay.co.uk/itm/DC-12V-24pin-ATX-160W-Pico-PSU-Auto-Computer-PC-MINI-ITX-Power-Supply-Module-/171809133347?pt=LH_DefaultDomain_3&hash=item28009f5323http://www.ebay.co.uk/itm/Mini-ITX-160W-12V-PICO-PSU-DC-DC-Power-Supply-ATX-Board-24-pin-/121669445862?pt=LH_DefaultDomain_3&hash=item1c541068e6very similar boards. Has anybody used one and if so what experience have you had with it?

author: Stray Electron
author_rank: Super Contributor
timestamp: June 24, 2015, 06:17:39 pm
content: I have a bunch of them that I salvaged out of some PCs that were used aboard ships to operate a Iridium based Glove i4 communications system made by Global Wireless. They all work fine. They came with a bunch of 12 VDC 5 Amp (IRRC) wall warts. Hmm, I just looked at one of the computers and the back panel says "12 VDC 1.8A". The mother board is a VIA EPIA-EK. I don't know about the quality of the ones on E-bay but these look just like them and everyone that I tried out works fine.PS I just pulled out one of the 12 VDC supplies to look and see if it was marked the same ("Z2-ATX-160") as the 2nd one on E-bay. It's not. This says "Mini-Box.com" on it so you might want to check there. (Markings aren't the same but they may still be made by the same company.)
I'd Like 450 of Your Stuffed Rotating Penguins Please - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: June 24, 2015, 06:46:20 am
content: My turn for a cool video:

author: TerraHertz
author_rank: Super Contributor
timestamp: June 24, 2015, 08:07:04 am
content: Oh wow, that's.... pengiulicious!Who was it asking in another thread for ideas for odd clock display technologies?Please, The Penguin Clock!Beats flip-dots any day.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 24, 2015, 08:32:14 am
content: ..and 100 plastic pandas....http://www.jasonbruges.com/projects/uk-projects/panda-eyes

author: miguelvp
author_rank: Super Contributor
timestamp: June 24, 2015, 08:53:51 am
content: who needs motors for the eyes to follow you:

author: Mr.B
author_rank: Unknown
timestamp: June 24, 2015, 08:55:27 am
content: Quote from: German_EE on June 24, 2015, 06:46:20 amFuck yes... You are not wrong there..That is beyond cool...

author: amyk
author_rank: Super Contributor
timestamp: June 24, 2015, 11:43:28 am
content: It's not a flip-dot, but a rotate-penguin display!What's the resolution? Somewhere around 21x21?This was the thread it reminded me of:https://www.eevblog.com/forum/projects/unusual-old-tech-displays/

author: noidea
author_rank: Unknown
timestamp: June 24, 2015, 01:13:12 pm
content: The most important question of all, what OS is it running one would hope Linux of course

author: EEVblog
author_rank: Unknown
timestamp: June 24, 2015, 01:34:22 pm
content: That's art!
Neat electronics related music video from 1986  - Page 1
Forum section: electronics / general

author: 0b01010011
author_rank: Regular Contributor
timestamp: June 26, 2015, 09:30:59 pm
content: The song 853-5937 by Squeeze is nearly 30yrs old but I didn't know of this neat video until now.Tillbrook et al performing the song on a giant pcb!

author: free_electron
author_rank: Super Contributor
timestamp: June 26, 2015, 10:13:36 pm
content: copy cats. Jm Jarre did this when these guys were still in diapers.

author: 0b01010011
author_rank: Regular Contributor
timestamp: June 26, 2015, 10:59:17 pm
content: looks like a better job as well! not a dip ic in sight in the squeeze vid!

author: Noise Floor
author_rank: Regular Contributor
timestamp: June 27, 2015, 05:27:00 pm
content: Well the Squeeze Vid is an actual set they built, the 2nd vid is just "green screened". Regardless, the song in the 2nd vid is my preferred.
I learn about transistors - Page 1
Forum section: electronics / general

author: Deathwish
author_rank: Unknown
timestamp: June 22, 2015, 09:48:53 pm
content: Today I learn all about transistors and how to make them, so we get some black plastic and three bits of wire and paint NPN on them, tomorrow we sell on ebay. We try to make PNP ones but Sergei he keep running to toilet , he such a nuisance at times.

author: c4757p
author_rank: Super Contributor
timestamp: June 22, 2015, 10:12:10 pm
content: Here, have a turnip.

author: Deathwish
author_rank: Unknown
timestamp: June 22, 2015, 10:17:27 pm
content: Would prefer some real grub

author: c4757p
author_rank: Super Contributor
timestamp: June 22, 2015, 10:36:40 pm
content: If you insist

author: Deathwish
author_rank: Unknown
timestamp: June 22, 2015, 10:40:25 pm
content: Yum. Now it not eat grass anymore, much more to smoke

author: IanB
author_rank: Super Contributor
timestamp: June 22, 2015, 10:57:42 pm
content: About those PNP transistors...https://youtu.be/apdkigbtNwQ
HP kills The Machine - Page 1
Forum section: electronics / general

author: tszaboo
author_rank: Super Contributor
timestamp: June 16, 2015, 08:17:48 am
content: Remember the memristror? The technology which could quantum leap forward the technology? And change computers from the Neumann achitechture to some unified technology?Well, it is dead:http://www.extremetech.com/extreme/207897-hp-kills-the-machine-repurposes-design-around-conventional-technologiesI guess HP realized it needs money to make this breakthrough, so plan B: Printer toners and government contracts.

author: bitwelder
author_rank: Super Contributor
timestamp: June 17, 2015, 06:47:17 am
content: How are they going now to redeem their karma points from the racketing on toner refills?

author: Sigmoid
author_rank: Frequent Contributor
timestamp: June 21, 2015, 01:21:48 am
content: Well they didn't "kill" it... It never lived.There was zero chance HP could have realistically pulled this off within a decade or so. All that's happened is that they admitted the obvious.

author: timofonic
author_rank: Frequent Contributor
timestamp: June 22, 2015, 10:55:07 am
content: It was just marketing crap, they are becoming irrelevant in the technical field
Seen online (UK): Deployable TUP-3 MW AM Broadcast Mobile Antenna System - Page 1
Forum section: electronics / general

author: dkozel
author_rank: Regular Contributor
timestamp: June 21, 2015, 11:52:19 pm
content: Anyone in need of a 5 kW 1-1.7 MHz transmitter? Comes with a 120 foot deployable tower and and trailer!http://whitelabel.globalauctionplatform.com/en-gb/auction-catalogues/wca/catalogue-id-witham1-10000/lot-f49be8a7-42c4-4325-a109-a4bc0112293f?clienturl=wcaIt was too beautiful for me not to share.

author: steve30
author_rank: Frequent Contributor
timestamp: June 22, 2015, 01:50:46 am
content: Any idea what they used it for?

author: Zad
author_rank: Super Contributor
timestamp: June 22, 2015, 02:27:26 am
content: I would hazard a guess that sometimes the army may operate in an area where they need to broadcast information to the local population, either for information or (less likely) propaganda purposes. AM MW radio is ideal for that sort of thing.

author: edavid
author_rank: Super Contributor
timestamp: June 22, 2015, 04:06:33 am
content: I don't think there is a transmitter included... just the antenna and tuner.

author: Melt-O-Tronic
author_rank: Frequent Contributor
timestamp: June 22, 2015, 04:59:19 am
content: I'll take it. Free shipping?

author: dexters_lab
author_rank: Unknown
timestamp: June 22, 2015, 09:02:08 am
content: damd i was looking for one of those last week LOL!maybe it's back from deployment in the middle-east?

author: Wilksey
author_rank: Super Contributor
timestamp: June 22, 2015, 10:42:57 am
content: It does say it is from the MoD!QuoteSo, if it boils your bollocks, tough shit.
Enginnering & Science News - Page 1
Forum section: electronics / general

author: Icarus
author_rank: Regular Contributor
timestamp: June 19, 2015, 09:24:04 pm
content: Hello Folks;Which news portal/sites/etc do you follow ?

author: Electric flower
author_rank: Regular Contributor
timestamp: June 19, 2015, 10:23:00 pm
content: I don't follow any portal or sites (except of this one) because ones i saw are fulled with pseudo scientists full of great idea, and none of the useful stuff.But on youtube there are some amazing technical minded people and i recommendElectronics:-The Post Apocalyptic Inventor-mikeselectricstuff-ElectroBOOM-lasersaberMechanical stuff:-colinfurze-AvE-Engineering Explained-jimmydirestaPhysics:-DrPhysicsAapplied physics:- Applied ScienceAll those i mentioned above are source of interesting information and you have chance to see a lot of things you probably wouldn't find in your everyday occupation.

author: tggzzz
author_rank: Super Contributor
timestamp: June 19, 2015, 11:08:31 pm
content: I don't follow video blogs because I can't speed-read them to see if there is anything interesting. I can speed read the equivalent of a 30 minute speech in a few seconds sufficiently well to know whether or not I want to read it properly. I'm prepared to spend a few seconds to see if something interests me; I'm not prepared to speng 30 minutes!Plus video blogs aren't searchable.

author: Fsck
author_rank: Super Contributor
timestamp: June 19, 2015, 11:18:57 pm
content: Quote from: tggzzz on June 19, 2015, 11:08:31 pmyou can watch at 200+% playback speed if you cared. but I agree, it still takes way longer than to read the equivalent amount of information.

author: HP-ILnerd
author_rank: Frequent Contributor
timestamp: June 20, 2015, 03:57:55 am
content: http://spectrum.ieee.org/Sixty Symbols on YouTube is fun too.

author: tggzzz
author_rank: Super Contributor
timestamp: June 20, 2015, 06:52:33 am
content: Quote from: Electric flower on June 19, 2015, 10:23:00 pmYou need to look harder.You need to understand the limitations of this: site it has significant strengths but - like all other sites - significant weaknesses.