hybridfree/eevblog-posts huggingface dataset:
Prepare for Slashdotting! - Page 1
Forum section: electronics / general

author: GeoffS
author_rank: Unknown
timestamp: October 10, 2012, 06:45:14 am
content: Dave,You got a mention over on Slashdothttp://ask.slashdot.org/story/12/10/10/0031236/ask-slashdot-what-equipment-and-furniture-for-an-electronics-hardware-laband a first post too!

author: EEVblog
author_rank: Unknown
timestamp: October 10, 2012, 10:23:37 am
content: That just seems to be the "ask slashdot" section, not the main news section which is the one that is notorious for bring down servers.I don't see any big jump in the stats unfortunately, wordpress claims only 450 extra views from that link.Dave.
Blown caps on 30 yo old perfectly working equipment - odd - Page 1
Forum section: electronics / general

author: T4P
author_rank: Super Contributor
timestamp: October 09, 2012, 06:20:31 pm
content: - Go figure30 yo old caps, only slightly bulgingOn one side only, the other side's electros are safe but i can't be too sure without a ESR measurement, the capacitance has really gone south anyway

author: SeanB
author_rank: Super Contributor
timestamp: October 09, 2012, 06:42:48 pm
content: Just replace them all and the PSU will be good for another 30 years then.

author: free_electron
author_rank: Super Contributor
timestamp: October 09, 2012, 06:46:39 pm
content: that transistor at the bottom of the picture under the cables doesn;t look to healthy too.. case is bubbling ... ( or is it a dab of glue they squireted on the nut ? )

author: T4P
author_rank: Super Contributor
timestamp: October 09, 2012, 07:15:51 pm
content: Quote from: free_electron on October 09, 2012, 06:46:39 pmGlue! They are VERY obnoxious in the 80s for glue everywhere ... The screws get glued, the wires get glued the seven segments get glued the fuse holder gets glued ... Was that the 80s ?But i think i broke something in the process ... the voltmeters don't show anything anymoreQuote from: SeanB on October 09, 2012, 06:42:48 pmJust replaced the ceramic caps ... Couldn't find any 50V 3300uF in ma box, time to grab some of 'em ( the current 2200uF don't seem to excite me )

author: SeanB
author_rank: Super Contributor
timestamp: October 09, 2012, 07:26:52 pm
content: Green goop, it probably would be cooler if there was a flat aluminium plate there to provide a flat mounting surface under it, along with more than the token smear it has. Your 5V rail would then be actually capable of supplying 1A for more than 20 seconds.

author: IanB
author_rank: Super Contributor
timestamp: October 09, 2012, 08:00:38 pm
content: The ceramic cap looks very exploded underneath the diode at the bottom of the board. Did it go bang when it failed?

author: T4P
author_rank: Super Contributor
timestamp: October 10, 2012, 08:59:29 am
content: No idea but i guess it's seen better days i only this used PSU this year ... the opposite board had it's ceramic cap blow even more violently leaving all sorts of scorched marksQuote from: SeanB on October 09, 2012, 07:26:52 pmIt just supplies the 5v rail to the ICL7106 and the display so it only needs the contact with the case and it's fully steel ...The output 5V rail is on a actual heatsink connected to the case, EEVBlog member digsys's 8203 was worse, the regulator was standing in the air running way over-temp!
Tek 2465B ch1, ch2 position/ clipping problem - Page 1
Forum section: electronics / general

author: hb_miguel
author_rank: Newbie
timestamp: October 10, 2012, 01:32:08 am
content: Hi all,I am new so please forgive any repeats of past threads. I have a 2465B that I've been adjusting / testing but I can't figure out why channels1 & 2 position voltage out of the channel multiplexer (U400) isn't up to spec. All of the power supply voltages are good, the positioning inputsto U100 and U200 pin 17 are close to spec (-4.5 - -5.16) but the output of U400 is +0.190 -> -0.104 when testing channels 1 & 2 (s/b +/- 0.7).Channels 3 & 4 are where they should be @ +/- 0.35. The position display for ch1 & 2 stops at 3 grids up / 2 down from center (where +/- 4 is full range).When at the extremes the on screen data displays jitter; channels 3 & 4 are fine. I'm hoping its something other than U400. Any guesses???Thanks in advance

author: bullet308
author_rank: Frequent Contributor
timestamp: October 10, 2012, 04:21:44 am
content: http://tech.groups.yahoo.com/group/TekScopes/Very tough to beat for these sorts of questions.
Can anybody make sense of the pricing craziness for these Fluke 87V variations? - Page 1
Forum section: electronics / general

author: Lightages
author_rank: Unknown
timestamp: October 08, 2012, 09:09:09 pm
content: http://canada.newark.com/fluke/fluke-87-5/multimeter-digital-handheld-4-1/dp/96H6287I don't understand this one. A bare 87 costs $513. A kit with the 87 and carry case and accessory kit costs less than the meter alone at $465. And it looks like the 87 with calibration certificate costs $476. Weird pricing.

author: saturation
author_rank: Super Contributor
timestamp: October 08, 2012, 09:44:40 pm
content: Sometimes its a question of stock: kits may move slower, and could have been in inventory for longer than stand alone meters. Given the CD$ ~ US$ having a premium over US prices is even more questionable, presuming those prices don't include taxes.Amazon.ca is much closer and free shipping:http://www.amazon.ca/Fluke-FLUKE-87-5-Digital-Multimeter/dp/B0002YFD1K/ref=sr_1_6?ie=UTF8&qid=1349732464&sr=8-6

author: Lightages
author_rank: Unknown
timestamp: October 08, 2012, 10:14:40 pm
content: Yes, as usual the Canadian prices are way out of line compared to the US. Even more so when the Canadian dollar is higher than the US dollar. I will not be buying from Newark, but was looking around for one.

author: kaptain_zero
author_rank: Regular Contributor
timestamp: October 08, 2012, 10:29:07 pm
content: Quote from: Lightages on October 08, 2012, 10:14:40 pmAt $345 w/free shipping from the Canadian Amazon site, I think it's going to be hard to find one cheaper elsewhere in Canada. Of course.... Amazon is currently out of stock, though in the past I've found they are pretty quick to stock up again. Had this deal been available when I got my 2 87V's off Ebay, I would have bought these instead. I paid a bit less than $300 for each of them, but both were new old stock....RegardsChristian
Is Wavetek gear any good? - Page 1
Forum section: electronics / general

author: poodyp
author_rank: Regular Contributor
timestamp: October 08, 2012, 07:41:24 am
content: I found a Wavetek 188-S-1257 being sold for super cheap as-is, and I'm wondering if Wavetek stuff was any good. I can't seem to find a lot of chatter on the net. I'm mostly just wondering how hard it will be to repair, should it be broken.

author: T4P
author_rank: Super Contributor
timestamp: October 08, 2012, 08:00:15 am
content: Wavetek made very tough equipment ...They have bought over by amprobe under fluke under danaher ... Testequipment-ception

author: poodyp
author_rank: Regular Contributor
timestamp: October 09, 2012, 10:22:23 am
content: I guess nowadays everyone is owned by someone else, except the ones that own everything.
Another "The Next Arduino" Candidate... - Page 1
Forum section: electronics / general

author: bullet308
author_rank: Frequent Contributor
timestamp: October 08, 2012, 11:43:55 pm
content: http://www.kickstarter.com/projects/18182218/freesoc-and-freesoc-mini?ref=home_spotlightCypress PsOC5-based.?

author: westfw
author_rank: Super Contributor
timestamp: October 09, 2012, 12:10:34 am
content: Too expensive and too complicated to replace Arduino. There's no way the average arduino user can navigate the Cypress tool used for defining peripherals from the on-chip FPGA. At the Cypress class I attended, one of the other students commented that lumping HW design and SW design into the same IDE "broke" traditional separation of those roles in most "real work" environments.Neat in its own right. The Cypress PSoC is an interesting set of chips.

author: Monkeh
author_rank: Super Contributor
timestamp: October 09, 2012, 02:35:55 am
content: Quote from: Mechatrommer on October 09, 2012, 02:25:21 amTo make it awkward to make your own shields, increasing sales of the official ones?Nah, can't be anything like that.

author: GeoffS
author_rank: Unknown
timestamp: October 09, 2012, 03:02:27 am
content: If you can live without shields (or can design your own equivalent),this onemay be a good alternative.Unlike the kickstarter ones, it actually exists, but like the kickstarters ones, thery're out of stock.Prices from memory was about $45.

author: poptones
author_rank: Frequent Contributor
timestamp: October 09, 2012, 03:05:26 am
content: The arduino pins should be assymmetric, but NOT the way they did it. The way they did it makes it a pain in the ass to use a perfboard. Fuckers. If anything it should be redesigned to align on a .1" grid. Or better still just use the tinys and nanos and say fuck the shields.

author: gxti
author_rank: Frequent Contributor
timestamp: October 09, 2012, 03:12:32 am
content: Quote from: Monkeh on October 09, 2012, 02:35:55 amYou're right, it can't. Arduino hasn't cornered the market on PCBs with off-grid headers, as evidenced by this very product. Any assclown with a PCB design tool can do it. It's just the poor saps using veroboard who are screwed. Hanlon's Razor applies here -- never attribute to malice that which can be adequately explained by stupidity.As for the end connectors, that's a total cockup. They should have at least made some of them coplanar so you can make expansion boards that need more than one set of pins. Maybe one to each side and then three on the end. But I still wouldn't buy one, this chip is just too pretty to live.
FEMTO hacks expose 3G Users  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: October 09, 2012, 12:52:30 pm
content: New privacy threats have been uncovered by security researchers that could allow every device operating on 3G networks to be tracked. The vulnerabilities could be exploited with cheap commercial off-the-shelf technology to reveal the location of phones and other 3G-capable devices operating on all 3G compliant networks. It was similar, but different, to previous research that demonstrated how attackers could redirect a victim's outgoing traffic to different networks."http://www.scmagazine.com.au/News/317819,flaws-allow-3g-devices-to-be-tracked.aspx

author: Sionyn
author_rank: Frequent Contributor
timestamp: October 09, 2012, 12:55:05 pm
content: more herehttp://wiki.thc.org/vodafone
WTF were they using this to test..? - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: October 08, 2012, 09:25:50 pm
content: http://www.ebay.co.uk/itm/290787209881Hazard stickers : laser, explosive, compressed gas, high voltage and RF hazard.Sod the chamber - I want what went in it!

author: SeanB
author_rank: Super Contributor
timestamp: October 08, 2012, 09:31:40 pm
content: I would guess avionics and weapons systems.........
have a look at this , there is a power pole involved so it a a little relevance - Page 1
Forum section: electronics / general

author: mickpah
author_rank: Regular Contributor
timestamp: October 08, 2012, 09:02:41 am
content: http://www.abc.net.au/news/2012-10-07/lucky-escape-for-rally-drivers-fans-in-vineyard/4299870amazing

author: SteveyG
author_rank: Unknown
timestamp: October 08, 2012, 09:48:56 am
content: That guy near the tree probably had no idea how close his life was to ending. A meter or so in the other direction and the wires would have landed on him.

author: poptones
author_rank: Frequent Contributor
timestamp: October 08, 2012, 06:53:03 pm
content: I was wondering what happened to the sound, I thought this was a post about Lech Walesa...
New EPA Dork Squad For Students - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: October 07, 2012, 07:47:50 pm
content: Greetings EEVBees:--When I went to junior high school the dorkiest kids were hallway monitors. The would wear the all white Sam Brown Belts, and they were there to make sure you had a hallway pass and were not ditching. They somehow were never to be seen off campus or after school. Now the EPA has reinvented the Dork Squad, and is calling it the Young Pioneers. Strike that, I forgot, that was the USSR. The new EPA Dork Squad is going to be called the Energy Patrol. No word on the uniforms yet.--I wonder how long before they will be tattling about energy usage by parents and neighbors, and leaving notes on SUVs. "How could this happen. My son was assaulted just because he told the neighbor's kid that their family was a bunch of greedy energy hogs, sob" See below link.http://cnsnews.com/news/article/epa-celebrates-children-health-month-encourages-recruiting-students-energy-patrols"I could see that, if not actually disgruntled, he was far from being gruntled."P. G. Wodehouse 1881 1975Best RegardsClear Ether

author: poptones
author_rank: Frequent Contributor
timestamp: October 07, 2012, 08:39:49 pm
content: How is this any different than "stop drop and roll" or D.A.R.E or March of Dimes or nuclear drills with children cowering under desks? We had this same stuff in schools 40 years ago - kids come home and tell mom how unsafe the "octopus" in the kitchen is, or how the dripping faucet is wasting water.Energy has quadrupled in price since 9/11. Our economic woes have us blaming each other (ahem.. cough) for the problems because no one wants to make the hard choices. The cheapest way to have more energy right now is to conserve it. It's not about being green, it's about national security. And yes, SUV owners who drive them alone most of the time are un-american.Hybrids can double mileage, but most SUV owners couldn't give a shit less. Ford had a good one, the hybrid package was dropped.
Star wars? Nintendo light gun fitted with laser. - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: October 06, 2012, 05:59:51 pm
content: This Nintendo light gun has been fitted with a 2 watt laser.

author: vk6zgo
author_rank: Super Contributor
timestamp: October 07, 2012, 02:44:11 pm
content: This worries me a lot.Making something which say,holds a laser so you fire it,but doesn't look like something harmless,is one thing.It is something else again to modify something which is known to be harmless,so it becomes dangerous.

author: bullet308
author_rank: Frequent Contributor
timestamp: October 07, 2012, 03:10:18 pm
content: Hm, well, for the foreseeable future, their pewpewpew will be no match for my bangbangbang. Unless I cover myself in match heads...though, the eye thing becomes a real concern...

author: saturation
author_rank: Super Contributor
timestamp: October 07, 2012, 03:23:18 pm
content: These are fairly easy to build and can cause quite a bit of mischief; if not retina damage, temporary blinding. The power to burn something is less a concern than injury to the eye, its the reason such weapons were discussed and later banned by treaty. Although the FAA tracks the source of lasers pointed at airlines in flight, its not to the point that these devices are illegal.http://en.wikipedia.org/wiki/Lasers_and_aviation_safetyhttp://en.wikipedia.org/wiki/Protocol_on_Blinding_Laser_WeaponsIMHO, how-to to make weapons, from lasers that can obviously blind people, to any others, should not be advertised on youtube, a competent EE can figure out how to make a powered laser, just as anyone with basic chemistry knowledge can make explosives. But by making it more easily accessible or suggest its plausible to others will very likely put it in the hands of users who may be more irresponsible or have a nefarious motive.
Daveland Government Censors Draft Snooping Laws - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: October 11, 2012, 10:17:55 am
content: "Stating that release of the draft legislation is not in the public interest  because it would prejudice decision making processes already in train, the Attorney General's Department has denied the release of the draft laws that would see wide-scale dragnet surveillance implemented along with an expansion of law enforcement powers for the purposes of 'national security'. Serkowski, speaking for the Pirate Party who lodged the FOI request labelled the Department response as 'disgraceful and troubling' saying the decision is 'completely trashing any semblance or notion of transparency or participative democratic process of policy development.'"oh dearhttp://delimiter.com.au/2012/10/10/govt-censors-pre-prepared-data-retention-bills/

author: EEVblog
author_rank: Unknown
timestamp: October 11, 2012, 10:26:06 am
content: In the end it's not going to matter, because they will still have to try and push their stupid laws through parliament, at which point they must become fully transparent. At which point it will never get through because of the public backlash. They have tried it before and lost. They will lose again.Dave.
wank word of the day "Nanthe Cleaning" - Page 1
Forum section: electronics / general

author: Mr J
author_rank: Regular Contributor
timestamp: October 06, 2012, 02:12:16 am
content: was looking at my Techspray heatsink compound and found the words Nanthe Cleaning on the tube. What the heck is Nanthe Cleaning? I've tried looking it up and came up empty. It's even on the data sheethttp://datasheet.octopart.com/1977-DP-TechSpray-datasheet-9784633.pdfMisspelling? Chinenglish? who knows?

author: ejeffrey
author_rank: Super Contributor
timestamp: October 06, 2012, 07:51:40 am
content: Possibly naphtha, indicating the solvent that can remove it?
Calculator with voltmeter and logging.. - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: October 05, 2012, 06:40:14 pm
content: Do anybody have any excperience with TI-Nspire CAS CX calculator and the TI-CBL 2 voltage sensor for logging?Calculator with voltmeter, how cool is that??Or the Differential Voltage Probe. Multiple Differential Voltage Probes that can be connected to a circuit without the use of a common grounding terminal?http://education.ti.com/educationportal/sites/US/productDetail/us_nspire_cx_cas.html?bid=5http://www.vernier.com/products/interfaces/ti-nslabc/http://www.vernier.com/products/sensors/voltage-probes/vp-bta/http://www.vernier.com/products/sensors/voltage-probes/dvp-bta/I have in order one TI-Nspire CAS CX so i will try out some of the fun that it can do..

author: T4P
author_rank: Super Contributor
timestamp: October 06, 2012, 06:24:08 am
content: Sounds good, but unfortunately the cradle alone cost an logging meter aloneNope, no good.

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: October 06, 2012, 08:25:15 am
content: Quote from: T4P on October 06, 2012, 06:24:08 amWell i got to have the cradel plus a bunch of sensors anyway for my project.Expenses are not an issue in this, a project for a school here.The calculator itself is a very powerfull beast, do realtime 3D rendering of graphs.
Another level of audiophile bull*hit - Page 1
Forum section: electronics / general

author: poorchava
author_rank: Super Contributor
timestamp: October 05, 2012, 01:14:32 pm
content: Check this outhttp://www.voodoocable.net/index.htmAnd the best part, price list:http://www.voodoocable.net/guest/VooDoo%20Retail%20Price%20List%20-%202012%20v.6.pdfAnyone interested in $3.4k power cable which has 'Holographic Soundstage Imaging'?It's really a secret to me how does someone dumb enough to buy those things make enough money to buy them...

author: M0BSW
author_rank: Frequent Contributor
timestamp: October 05, 2012, 01:25:25 pm
content: Well I remember years ago, there was a company over here selling gold jack Plugs which were supposed to make any audio system sound better, they sold 1000's of them, not to me I may add. I had the the chance to hear the improved sound, that wasn't there, how ever the people who bought them said it was better, there's an old saying over here in the UK, "A fool and his/her money is soon parted". Can I sell anyone some rusty washers gauranteed to make me rich.

author: Astroplio
author_rank: Regular Contributor
timestamp: October 05, 2012, 01:34:26 pm
content: Quote from: poorchava on October 05, 2012, 01:14:32 pmThat's the million dollar question...I would also like to know how many of these people build a special acoustic room for their super-expensive gear or they just throw their equipment in their living room with whatever obstacles in the way for the sound waves (reflections, absorptions, diffusions).

author: madires
author_rank: Super Contributor
timestamp: October 05, 2012, 01:38:45 pm
content: Hey! You! Yes, you! I got a very special offer today. Psst! Just for you! A warp field compensated power cable with cryogenical treatment of course. But decide quickly! Just today! Just for you!LMAO :-)

author: G7PSK
author_rank: Super Contributor
timestamp: October 05, 2012, 02:06:05 pm
content: There have been this type of advertising of wondrous goods since radio and music reproduction was invented.I have a December 1929 copy of Amateur wireless that has lot of such adverts in it one is for an OHMITE brand resistor that is better than wire wound, noiseless and efficient so that the high notes are retained.People have fallen for this sort of rubbish through the ages, my guess is it wont stop, someone will always buy.
Salesman Look How Strong This Tv Is....... - Page 1
Forum section: electronics / general

author: tom66
author_rank: Super Contributor
timestamp: October 04, 2012, 12:00:53 am
content: The salesman as usual is talking complete bull when he claims the TV screen is tougher.It is not necessarily true that either technology is tougher. When the Wii controller hits the screen no LCD or plasma will survive. Unless it's one of the Panasonics with the front glass plate. That will break, but usually the plasma display inside will survive. Still an expensive glass plate to find and replace...I guess they're scared of the guy getting electrocuted when he cracks the screen as it is off when they do that. However, there is limited shock hazard. When the screen cracks, the electrodes in the panel short, and the TV makes a rather horrid buzzing sound :/. You lose gases and typically picture goes immediately, but sometimes it fades slowly over about 30 seconds.

author: HackedFridgeMagnet
author_rank: Super Contributor
timestamp: October 04, 2012, 02:22:02 am
content: Breaking TVs must be genetic then.

author: G7PSK
author_rank: Super Contributor
timestamp: October 04, 2012, 07:40:39 am
content: My wife got annoyed with our Sony Bravia and beat the shit out of the screen with the remote control.She did not break it, a few scratches on the screen is all. Also when the bottom fell out of the hot water tank recently which brought the ceiling down on top of it, it survived without a scratch.

author: Sionyn
author_rank: Frequent Contributor
timestamp: October 04, 2012, 11:02:52 am
content: oops

author: Tepe
author_rank: Frequent Contributor
timestamp: October 04, 2012, 03:24:36 pm
content: Quote from: G7PSK on October 04, 2012, 07:40:39 amGet a replacement wife.

author: tom66
author_rank: Super Contributor
timestamp: October 04, 2012, 04:15:03 pm
content: And...
How does this work?  Distortion Detector/Analyzer - Page 1
Forum section: electronics / general

author: george graves
author_rank: Super Contributor
timestamp: October 02, 2012, 10:18:30 pm
content: This is a tool for car audio guys to detect distortion when setting up the gains on the stereo, amps, and other signal processing stuff.http://www.sonicelectronix.com/item_61378_SMD-DD-1-Distortion-Detector-Analyzer-by-Steve-Meade-Designs.html?utm_source=google&utm_medium=cpc&utm_campaign=productads&gclid=CNjA8q-u47ICFShxQgodB34A3gAny idea on how it works? (it's not open source)

author: Short Circuit
author_rank: Frequent Contributor
timestamp: October 02, 2012, 10:28:44 pm
content: Bandstop (or just highpass) filters for the original tones followed by peakdetectors with a level indicator LED.Probably requires a substantial amount of distortion before it actually triggers.

author: ejeffrey
author_rank: Super Contributor
timestamp: October 02, 2012, 11:00:34 pm
content: The traditional THD(+N) meter is a high purity sine wave oscillator with a tuned notch filter that rejects the oscillator tone. Any harmonics generated by the DUT will pass the filter. The resulting signal goes through some type of level detector. The performance of the meter is determined by the spectral purity of the oscillator and the depth of the notch. You can also use bandbass filters to isolate individual harmonics, but normally THD is what you care about.A modern version would digitize the output of the notch filter and use an FFT to identify the relative harmonic strengths as well as improve rejection of the input tone.

author: poptones
author_rank: Frequent Contributor
timestamp: October 02, 2012, 11:04:46 pm
content: He still had distortion when he did the midrange unit.Funny. And ironic. Even on a youtube video I'd just use my ears. Always worked before.
Funny circuit diagram - Page 1
Forum section: electronics / general

author: Mcfly
author_rank: Contributor
timestamp: September 29, 2012, 05:03:53 pm
content: check this outhttp://xkcd.com/730/

author: EEMarc
author_rank: Regular Contributor
timestamp: September 29, 2012, 05:39:52 pm
content: That circuit was funny the first 20 times I looked at it.It still is.

author: T4P
author_rank: Super Contributor
timestamp: September 29, 2012, 07:44:23 pm
content: The laser thing is hilarious!http://what-if.xkcd.com/13/

author: prenato
author_rank: Regular Contributor
timestamp: October 02, 2012, 05:12:41 am
content: My favorite xkcd, electronics-related, comic is "Diode":http://xkcd.com/814/
Mele A1000 ARM device - any users? - Page 1
Forum section: electronics / general

author: GeoffS
author_rank: Unknown
timestamp: August 03, 2012, 12:49:01 pm
content: I've been looking at small ARM based system like the Raspberry Pi and came across the Mele A1000.It has most of the features that the Pi has as well as plus such things as SATA interface.I'd be interested to hear anyone's experiences with this device.I'm looking to make a device for tracking a fleet of small boats via GPS and wireless broadband based on something like this or the Pi.Here's a linkto it and some other small Linux/Android devices.the Mele A1000 is an ARM PC that runs Android 2.3 originally, but it can be tweaked to run Ubuntu Linux as well. It’s powered by the ARM-based Allwinner A10 chip and a 1.2GHz Cortex A8 ARM core processor. Graphics-wise, a MALI400MP OpenGL ES 2.0 GPU is onboard,

author: Hari Gas
author_rank: Newbie
timestamp: September 30, 2012, 05:37:54 pm
content: What did u end up in choosing HW for your project? I am also planning to have prototype done for School buses in India, I really appreciate if you can share HW details!Thanks--HariQuote from: GeoffS on August 03, 2012, 12:49:01 pm

author: GeoffS
author_rank: Unknown
timestamp: September 30, 2012, 10:15:31 pm
content: Not much to share I'm afraid.Hardware consists of a Mele A2000, a Holux USB GPS device and a USB wireless broadband modem. I still need to source a power supply that will run it all from 12/24V.Most of the work is in the software which so far is only a few open source programs to test out the concept. I hope to have it installed in my van for testing 'soon'.
understanding "ITIC(CBEMA) curve" - Page 1
Forum section: electronics / general

author: m4rtin
author_rank: Regular Contributor
timestamp: September 29, 2012, 11:36:49 pm
content: Information Technology Industry Council (ITIC) curve represents the withstand capabilities of computers in terms of the magnitude and duration of the voltage disturbance:Few questions regarding this graph:1) How should one understand "Duration in Cycles"?2) Am I correct that for example network switch PSU rated to 100 - 240V can accept 400V for up to 1ms period?3) How wide-spread "ITIC(CBEMA) curve" is in practice? Are all modern PSU's made according to this standard?

author: saturation
author_rank: Super Contributor
timestamp: September 30, 2012, 02:00:46 pm
content: Its the idealized tolerance of a computer PSU to voltage variation. Its one reason you only need a surge protector with a clamping voltage of about 300-400Vp, which is the common plug in variety in protecting your home PC.It was called the CBEMA curve back in the 1970s. Not sure how many PSU made today are compliant, when they were made in the USA most were. It was a design criteria for PSU. However, a simple MOV in the inputs provides quite a bit of protection, and add to it a plug in surge protector meets most of the criteria [ most because it depends on the quality of your surge protector and assumes a virgin MOV].http://www.powerqualityworld.com/2011/04/cbema-curve-power-quality-standard.htmlIIRC then:1. duration in cycles = 1/60 sec2. Yes. Most PSU have a MOV as a surge protector in the inputs and will allow such transients until MOV fails.3. For mainframe PSU they are, and more.
Rigol Oscilloscope issue - Page 1
Forum section: electronics / general

author: Centmo
author_rank: Contributor
timestamp: September 19, 2012, 09:08:02 pm
content: Hi, I have the Rigol DS1204B scope, which is essentially the same as the all-popular DS1052E except it has four inputs instead of two, and 200MHz bandwidth instead of 50/100MHz.I purchased a differential probe to measure a differential signal, which looks like a square wave from 0.05V to 60V. What I am trying to do is zoom in on the 0.05V part of the waveform (the troughs) and view it on a 50mV/div scale. The problem is that once I zoom in past 5V/div, to 2V/div, it appears that the scope automatically switches from DC coupling to AC coupling (even though DC coupling is selected), and the part of the waveform I am interested in disappears off the bottom of the screen. So far off the screen, I can't move it up high enough to see it without hitting the limit.Is this due to the fact that my signal has a high-voltage component, and I am running into a dynamic range issue? Is there anyway around this?Thanks.

author: Mechatrommer
author_rank: Super Contributor
timestamp: September 20, 2012, 05:48:43 pm
content: Quote from: Centmo on September 19, 2012, 09:08:02 pmare you measuring at 1X attenuation setting? if so retry at 10X setting.

author: Centmo
author_rank: Contributor
timestamp: September 20, 2012, 06:18:17 pm
content: Thanks for the reply. The probe is set to 10X, and the oscilloscope channel also to 10X.Here is the probe I'm using:http://www.probemaster.com/product_info.php?products_id=62

author: Mechatrommer
author_rank: Super Contributor
timestamp: September 20, 2012, 06:26:59 pm
content: i will be very very very interested looking at signal snapshot (differential signal using the stated probe, and both signal separately in CH1 and CH2 using standard rigol probe) and noise floor of the above mentioned differential probe and performancecant help you much with your problem, rigol scope can always give nasty surprises.

author: nixxon
author_rank: Frequent Contributor
timestamp: September 30, 2012, 01:29:18 pm
content: Quote from: Centmo on September 20, 2012, 06:18:17 pmCan you read the low voltage part if you set probe to 10X and Scope to 1X?

author: Short Circuit
author_rank: Frequent Contributor
timestamp: September 30, 2012, 01:58:47 pm
content: Dynamic range is only 10 divisions. Beyond that, you cannot trust the display anymore due to clipping/saturation effects.
CNC control diagnostics- Mysterious "descriptions" on drawing to interpret.. - Page 1
Forum section: electronics / general

author: Milacron
author_rank: Contributor
timestamp: September 27, 2012, 05:00:42 pm
content: In the below PDF file, sheet 4 (incl cover), any idea what (sp) and (mc) might mean ? (sp) is used regarding a simple momentary switch, tempting to guess "single point" but (mc) is used for simple ST1 limit switches. One is tempted to guess "momentary contact" but seeing as the "switches" are that way as well, I'm not sure what to think.http://www.practicalmachinist.com/fnc60diagnostic.pdf

author: Kremmen
author_rank: Super Contributor
timestamp: September 27, 2012, 05:12:49 pm
content: Elsewhere in the document there are several inputs that definitely appear on a CNC machine operator panel so one is tempted to guess that (P) could mean (operator) Panel. Extrapolating from that, SP could be Service Panel, maybe? If there is such a thing in the machine.MC could simply mean "MaChine" since many of the inputs could plausibly be limit switches and similar.What is the nature of your interest? Fixing a broken machine / rebuilding / something else?

author: Milacron
author_rank: Contributor
timestamp: September 29, 2012, 02:33:54 pm
content: Quote from: Kremmen on September 27, 2012, 05:12:49 pmThanks for the input. Isn't it lame that they can't simply spell out what they mean ? If (MC) means "machine" why can't they just put (machine) ? Like they were too lazy to type out another 5 letters.Re nature of interest, repair.

author: Kremmen
author_rank: Super Contributor
timestamp: September 29, 2012, 08:19:03 pm
content: Assuming you have the macine to be fixed in front of you, why not trace one of these inputs to see where the leads - hmm - lead. That way you can confirm my hypothesis or disprove it and maybe come up with a better one.

author: Milacron
author_rank: Contributor
timestamp: September 30, 2012, 04:03:23 am
content: FWIW, numbers beginning with X are inputs, Y are outputs. Each bit has corresponding page number in electrical schematics, and description of it's purpose. Dynamic diagnostic parameters can be brought up on CRT to examine 0 or 1 in real time depending on switch or limit switch positions. The tricky part is knowing what should be 0 and what should be 1 depending on circumstance. With tool clamped I was getting a 0 where I think there should have been a 1, which led to limit switch adjustment. Machine now working properly but I'm not positive it's due to my adjustment, could just be the mood of the machine...we will see.

author: er11
author_rank: Newbie
timestamp: October 02, 2012, 07:24:01 pm
content: Hello,MC : machine cabinetSP : spindleP : controle panel
Will a 5.8 GHz wireless SCART transmitter interfere with 802.11n 5 GHz wifi? - Page 1
Forum section: electronics / general

author: mondalaci
author_rank: Contributor
timestamp: September 29, 2012, 11:29:20 pm
content: Hi guys,I plan to buy aKönig VID-TRANS515KN 5.8 Ghz wireless SCART transmitter. I also plan to upgrade my wifi router to a wireless N device. I'm afraid that the two will interfere badly. According to what I read 5 GHz wifi actually uses the 5.1 to 5.8 GHz frequency range which seems to justify my concern.What's your take on this?Thanks,Laci
Hell phone un-boxing - Page 1
Forum section: electronics / general

author: Majorstrain
author_rank: Contributor
timestamp: September 28, 2012, 01:26:57 am
content: I found this on Winston Sterzel's G+ page.He un-boxes (sort of) some tech gadgets with a difference.http://youtu.be/Yjno5G31IPMCheck it out, It's quite amazing what you can get to forward on to relatives.enjoy,Phil
looking for mini customizable keypad - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: September 27, 2012, 11:58:48 am
content: I need a small keypad with a few buttons on it from the standard keyboard like esc, ctrl, alt, del ect, does such a thing exist or am I quicker ripping a controller out of a keyboard and making my own pad ?

author: PeterG
author_rank: Frequent Contributor
timestamp: September 27, 2012, 12:35:15 pm
content: I am in the process of building one. It is quite easy using Arduino to mimic a usb keyboard.All you need is an Arduino Mini and a few pushbuttons.Regards

author: GeoffS
author_rank: Unknown
timestamp: September 27, 2012, 12:36:21 pm
content: These onescan be programmed for whatever functions you require and have a built in OLED display. Not the cheapest option (they sell a 102 key keyboard for around $1600!)This placehas some good customisable keyboards. Not the cheapest way to go but good quality.There are alsoarcade gameUSB interfaces, you just provide the switches.

author: Rerouter
author_rank: Super Contributor
timestamp: September 27, 2012, 12:39:01 pm
content: buy a dollar store number pad, throw in your own controller and add your own labels

author: Simon
author_rank: Unknown
timestamp: September 27, 2012, 12:58:46 pm
content: Quote from: PeterG on September 27, 2012, 12:35:15 pmSo how does that work, I have a 3D mouse but got the cheap one (£100 !!!) with only 2 buttons. Now I want to put it in a nice wood base and incorporate more buttons. what sort of software do I need for the arduino as I'm a programming noob ?

author: PeterG
author_rank: Frequent Contributor
timestamp: September 27, 2012, 01:13:21 pm
content: Simon, the software is fairly painless to learn(i managed to learn it ).All i think you will need is an Arduino Mini board and a few push buttons. The programming software is all free and the boards are programmed via a USB cable.I am thinking Arduino because the programming software comes with a USB Mouse/Keyboard Library out of the box. This saves you hand coding all the USB stuff.I would maybe start with this board for this project.http://arduino.cc/en/Main/ArduinoBoardLeonardoSoftware wise, this is the Library to look at.http://arduino.cc/en/Reference/MouseKeyboardRegards

author: Simon
author_rank: Unknown
timestamp: September 27, 2012, 04:41:30 pm
content: yes that is what I meant, are there libraries available to emulate the keyboard.
SKY TV all copper and nickel comes from the rainforest  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: September 25, 2012, 07:14:52 pm
content: all copper and nickel for electronics comes from the rainforest hurting the rainforest theirfore bad.utter nonsense i sayModerator: added missing link from following thread.http://sky1.sky.com/the-peoples-rainforest/the-peoples-rainforest-new-eco-entertainment

author: poptones
author_rank: Frequent Contributor
timestamp: September 25, 2012, 07:20:14 pm
content: SKY TV needs tovisit Tucson.

author: poodyp
author_rank: Regular Contributor
timestamp: September 25, 2012, 07:39:48 pm
content: Soo, what's this about? A link would be useful...Quote from: Mechatrommer on September 25, 2012, 07:35:46 pmIt's therefore regardless of where you're from.

author: SeanB
author_rank: Super Contributor
timestamp: September 25, 2012, 08:09:35 pm
content: They are sort of right, a lot of copper comes from the Copper Belt in Africa. Of course a lot is recycled as well.

author: nitro2k01
author_rank: Frequent Contributor
timestamp: September 25, 2012, 08:35:19 pm
content: Quote from: Mechatrommer on September 25, 2012, 07:35:46 pmQuote from: Mechatrommer on May 10, 2397, 03:57:49 amJust sayin'.

author: vk6zgo
author_rank: Super Contributor
timestamp: September 26, 2012, 04:06:26 am
content: Quote from: poptones on September 25, 2012, 07:20:14 pmOr Kambalda!As far as I know,most copper & nickel comes from quite arid areas.They may have been rainforests 30 million years ago,though!

author: Kremmen
author_rank: Super Contributor
timestamp: September 26, 2012, 06:10:13 am
content: Quote from: Sionyn on September 25, 2012, 07:14:52 pm... and you would be correct.Take nickel and check the maphttp://upload.wikimedia.org/wikipedia/commons/1/18/Nickel_%28mined%292.PNGNo rainforests in Russia. Actually the largest deposit is in former Finnish soil around the town of Nikel ( 1 guess where the name comes from ) ( 1 more guess why the Soviet Union demanded to redraw the border after War II ). While there are some deposits in rainforest areas they are not dominant and definitely not the only ones.Similarly with copper. Again you only need to look at the map:http://upload.wikimedia.org/wikipedia/commons/2/2d/2005copper_%28mined%29.PNGLargest producers combined are Chile and Peru. That copper comes from the high Andes and not from rainforest. ( I have seen photos of those mines since my brother has sold lots of Finnish mining equipment to S. American copper mines in the past). USA alone is a considerable producer and again not known for its jungles. Back in the day even our dear neighbor to the west, Sweden, used to be a major player. As witnessed by the name of their biggest mining company; Stora Kopparberg - the Great Copper Mountain. Again, rainforests are not to be seen around...So, the level of SKY TV journalism is not in the sky but rather swept under the carpet, i.e. nonexistent.
Faux Fluke - Page 1
Forum section: electronics / general

author: Excavatoree
author_rank: Frequent Contributor
timestamp: September 25, 2012, 02:15:01 am
content: Have you wanted that rare fluke of a Fluke 87 with the jack color error to add to your collection? Is a one in a million item simply out of your budget? Do you wish you could have the look of that unique meter at a lower cost? Well, Excavatoree INC. has the solution. Yes, here it is: the Faux fluke Fluke 87 input jack assy:Yes, a Fluke 87 input jack assembly painstakingly(er, uh, half-assed) crafted by(someone who uses the same tools as)a master craftsman!Order now! Hey, the market for faux collectable isn't just for purses and shoes.I had to see if it was possible. As you can see, this is a pretty tired, dirty old input jack, rescued from my scrap bin in a bit of weekend boredom to see what it would take to replicate the famous jack error Fluke. It can't withstand much scrutiny, as the moved red jack is a bit low, the moved black jack is a bit high, and both have concentrically issues. I wasted about 15 minutes on this useless activity, and got to have fun with the Dremel tool.No, it's not a photo edit job; that would have been faster. This fine replica actually exists.

author: EEVblog
author_rank: Unknown
timestamp: September 25, 2012, 02:16:45 am
content: This has a KickStarter campaign written all over it!Dave.

author: TriodeTiger
author_rank: Regular Contributor
timestamp: September 25, 2012, 02:44:04 am
content: Call me a hansom beast if this has nothing to do with this, but is this a response to Sgt. Rock's post?https://www.eevblog.com/forum/general-chat/fluke-87-v-jack-receptacle-backwards/Your photobucket links is stalling for me for the time being, so I've no clue if this is related.
for all the nerds: marshmallow on the blower - Page 1
Forum section: electronics / general

author: singera
author_rank: Contributor
timestamp: September 26, 2012, 08:35:46 am
content: hey for all,today in israel its Yom Kippur, lots of the people fast and Torture them self, there arn`t Business, public transportation services, flights (all the airports and sea ports are closed except for emergency), even cars not running.but the people that not fast and torure them self are riding the bike on the high way that almost free from car, do BBQ, watching DVD movies and episodes (TV service also DOWN except for stations that outside of israel) etc etc.so as a nerd Im doing marshmallow on the blower.

author: GeoffS
author_rank: Unknown
timestamp: September 26, 2012, 08:38:07 am
content: As long as they're kosher marshmallows
Self inflating tyre - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: September 25, 2012, 03:45:32 am
content: So it's not electronic, but there's something awesome about this kind of mechanical solution to a problem.Goodyear has made a tyre that regulates its own pressure using a self-inflation system inside the tyre.From what i can tell, when the tyre pressure drops below min psi a valve automatically opens so external air can flow into a special cavity.As the wheel rotates the squashing of this cavity pushes that air through a one-way valve and into the tyre to inflate it.Then it automatically stops when the correct pressure is reached.http://www.nbcnews.com/technology/futureoftech/self-inflating-tire-tech-saves-you-pump-1B6034786

author: vk6zgo
author_rank: Super Contributor
timestamp: September 25, 2012, 04:21:40 am
content: It's been"just around the corner" since 1957.It seems we have reached the corner!

author: NiHaoMike
author_rank: Super Contributor
timestamp: September 25, 2012, 05:23:30 am
content: I remember reading about something similar except it was built into the wheel, so it would work with any ordinary tire.

author: GeoffS
author_rank: Unknown
timestamp: September 25, 2012, 07:20:12 am
content: Self sealing punctures? You needSlime!

author: G7PSK
author_rank: Super Contributor
timestamp: September 25, 2012, 07:30:22 am
content: Some form of peristaltic pump built into the tyre, Nature was there first as usual.

author: Psi
author_rank: Super Contributor
timestamp: September 25, 2012, 08:48:22 am
content: Quote from: Mechatrommer on September 25, 2012, 06:35:55 amI think they're intended to make up for the natural slow-leak you get as air escapes between the rubber molecules.So you don't have to keep checking and topping up.

author: SeanB
author_rank: Super Contributor
timestamp: September 25, 2012, 07:21:17 pm
content: Better is a central tyre inflator. Just has a tube that is plumbed through the axle or a free turning union and a pipe to the centre of the hub. Works on Gelandewagons and timber haulers.
The Reg's Sharwood Pens Hit  Piece On The Woz - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: September 25, 2012, 04:22:07 am
content: Greetings EEVBees:--See below link for a snarky hit piece on the Woz by Simon Sharwood of The Register. What did Sharwood ever do for anybody? You can leave Sharwood a message if you want by clicking on his name at the top of the story.http://www.theregister.co.uk/2012/09/25/what_does_steve_wozniak_do_for_fusion_io/--I posted the link so Dave can try to get an interview with the Woz. It could happen."Wherever smart people work, doors are unlocked."Steve Wozniak 1950 -Best RegardsClear Ether
Renesas in trouble, Japan Inc. to rescue  - Page 1
Forum section: electronics / general

author: T4P
author_rank: Super Contributor
timestamp: September 24, 2012, 04:19:00 am
content: Check it out, they who claimed they were used everywherehttp://www.google.com/hostednews/afp/article/ALeqM5gINy1xyyCiLF5gx198MttEmbix4g?docId=CNG.730f4c32b301b3ffcdb0c9cbbf3dbad7.231Next devcon? Probably not.

author: nanofrog
author_rank: Super Contributor
timestamp: September 24, 2012, 08:30:56 am
content: I wouldn't want a US investment holding company to acquire control either...Too much chance they'd run it into the ground due to a lack of knowledge IMHO.

author: T4P
author_rank: Super Contributor
timestamp: September 24, 2012, 07:16:22 pm
content: Quote from: nanofrog on September 24, 2012, 08:30:56 amOR worse, a company from somewhere in china!!

author: nanofrog
author_rank: Super Contributor
timestamp: September 24, 2012, 11:44:12 pm
content: Quote from: T4P on September 24, 2012, 07:16:22 pmGood point...