hybridfree/eevblog-posts huggingface dataset:
Always double check shopping cart prices - Page 1
Forum section: electronics / general

author: alexig
author_rank: Contributor
timestamp: September 29, 2013, 08:44:03 am
content: I'm wondering if anyone else was/is affected by this pricing issue on the RS Components website - the product price says one thing but the shopping cart says another thing? (I've just emailed RS about this issue)By the looks of things, it's affecting these parts (there are probably more):773-7699773-7847773-7709773-7692686-9385686-9331773-7803 (Ordered last month and found out today that I was charged $1.1 per chip)Cheers,Alex

author: David_AVD
author_rank: Super Contributor
timestamp: September 29, 2013, 11:50:32 am
content: I know if you leave stuff in the cart (at other places) and the price increases in the meantime you have to watch out, but this seems like a very odd error.

author: sleemanj
author_rank: Super Contributor
timestamp: September 29, 2013, 12:53:55 pm
content: Quote from: alexig on September 29, 2013, 08:44:03 amChecked 773-7699 on the NZ RS site and same issue with it, price on the details page $0.18ea, price when you add to the cart, $0.841ea

author: TheWelly888
author_rank: Frequent Contributor
timestamp: September 29, 2013, 02:52:49 pm
content: Are you sure you are looking at the right multiple price?RS charges less per unit when bought in bulk. eg RS may charge $1 per widget from 1 - 4 widgets; 80 cents per widget for 5 - 19 widgets and 50 cents per widget for 20 widgets upwards.

author: Rufus
author_rank: Super Contributor
timestamp: September 29, 2013, 06:27:15 pm
content: Quote from: alexig on September 29, 2013, 08:44:03 amDigikey 10 off price is $0.57. A reel of 2500 is still $0.21 so I would say the basket price is the correct one.Still an annoying and strange bug. Let us know what they say about it.

author: ciccio
author_rank: Frequent Contributor
timestamp: September 30, 2013, 08:02:15 pm
content: Just tested on Italian RS site: no errors, the one-off price for 773-7699 is 0.41 Euros and the basket price is 4.10 euros for the 10 pieces minimum order.Best regards

author: alexig
author_rank: Contributor
timestamp: October 01, 2013, 09:28:09 am
content: Hmm looks like they've fixed it now, didn't receive any emails back from them.

author: alexig
author_rank: Contributor
timestamp: January 20, 2014, 12:24:32 pm
content: Another item to add to the list of things to check on:Even though the anti-static bag says one thing - don't count on it. I received some 128Kbit EEPROMs which were marked as "512Kbit model" on the static bag from RS!
[YouTube] How to fix a faulty router - Page 1
Forum section: electronics / general

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 19, 2014, 09:38:24 pm
content: Sorted.

author: tealsuki
author_rank: Contributor
timestamp: January 20, 2014, 12:20:55 am
content: +1I've got a Belkin and a D-Link I should send his way. Intermittent connection my ass.

author: tom66
author_rank: Super Contributor
timestamp: January 20, 2014, 12:34:39 am
content: I've never quite got why anyone would buy home broadband in particular from EE. I mean, there's so many other providers also reselling BT's network at lower prices and/or with better service.

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 20, 2014, 12:36:26 am
content: Quote from: tom66 on January 20, 2014, 12:34:39 amI beg to differ; EE broadband is amazing for us, it's the routers that are junk.
[YouTube] Olimex "PIC-KIT3" taken apart - Page 1
Forum section: electronics / general

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 19, 2014, 09:39:46 pm
content: Me, taking apart the Olimex "PIC-KIT3" to inspect:

author: mariush
author_rank: Super Contributor
timestamp: January 19, 2014, 10:01:58 pm
content: The headers on the board are ICSP for the PIC24 and EEPROM , for the eeprom chip right by the header.Otherwise, yes, looks good. For 20$ it's quite a lot of stuff in it.

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 19, 2014, 10:05:16 pm
content: Quote from: mariush on January 19, 2014, 10:01:58 pmYep. It's a great programmer, FAR better made than the official one!
Organic mega flow battery - Page 1
Forum section: electronics / general

author: John_L
author_rank: Contributor
timestamp: January 17, 2014, 09:55:07 pm
content: http://www.seas.harvard.edu/news/2014/01/organic-mega-flow-battery-promises-breakthrough-for-renewable-energyLooks promising.

author: Rerouter
author_rank: Super Contributor
timestamp: January 17, 2014, 10:23:04 pm
content: i may have overlooked it, but looking at there research paper they only listed energy density as W per centimeter squared? I was hoping to find a nice simple Watts per kg reference point as to how it compared,
Nano satellite power supplies - Page 1
Forum section: electronics / general

author: dexters_lab
author_rank: Unknown
timestamp: January 17, 2014, 08:32:23 pm
content: Saw this and thought it might be of interest here...http://gomspace.com/index.php?p=products-p31u

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 17, 2014, 08:39:04 pm
content: Quote from: dexters_lab on January 17, 2014, 08:32:23 pmThank youthis looks brill.Have a lovely day
Marketing win/UFOlogists fail - Page 1
Forum section: electronics / general

author: daqq
author_rank: Super Contributor
timestamp: January 17, 2014, 06:03:15 pm
content: #3 in :http://www.cracked.com/quick-fixes/4-creepy-mysteries-with-hilariously-stupid-explanations/In short: The alien message was not an alien message, but rather a crude drawing of an NVidia IC. That didn't stop the ... experts ... from decoding it as an alien message.http://news.yahoo.com/crop-circle-publicity-stunt-why-39-experts-39-162721357.html

author: daqq
author_rank: Super Contributor
timestamp: January 17, 2014, 06:08:44 pm
content: My apologies, title has been amended.

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 17, 2014, 06:18:54 pm
content: Quote from: daqq on January 17, 2014, 06:08:44 pmPlease ignore my previous post, which I've deleted, and I'm sorry - I am in a bit of a grumpy mood - it's nothing to do with your postTake careMatt.
resources for learning embedded programming recommendations needed. - Page 1
Forum section: electronics / general

author: tiago
author_rank: Contributor
timestamp: January 13, 2014, 11:28:52 pm
content: What resources do you guys recommend for learning embedded c programming for an absolute beginner?Thanks

author: nctnico
author_rank: Super Contributor
timestamp: January 14, 2014, 12:11:15 am
content: Learn to write C on a PC properly first otherwise you'll be in for endless debugging.

author: mtdoc
author_rank: Super Contributor
timestamp: January 14, 2014, 12:43:12 am
content: I plan on takingthis free online embedded systems lab coursewhich starts on Jan 22. The TI Tiva C development board and the few parts required can all be had for under$30.

author: tiago
author_rank: Contributor
timestamp: January 16, 2014, 01:09:36 am
content: Thanks for that. I have signed up as well.Anyone else recommend anything resources?

author: Galenbo
author_rank: Super Contributor
timestamp: January 19, 2014, 06:18:18 pm
content: Quote from: tiago on January 13, 2014, 11:28:52 pmYou buy 1 complete working "Kit"That means: Development board, power supply, programmer, programming cable, software IDE, programming software, documentation.-The development kit schould offer input buttons, output leds or relays, and some networking connectors.-The software schould offer working examples.Other things having around could be soldering iron, breadboard, cables, multimeter, sensors.Multiple "solutions" exist, none is optimal or covering everything. everything has its drawbacks, advantages, users community, etc.You choose. Buy it directly.I bought the Easypic 7http://www.mikroe.com/easypic/and discovered the advantages and drawbacks. Still happy with it.You can evtl buy something else, and be happy with it for other reasons.Don't take 20 hours to hesitate, instead go cleaning dishes 18 hours witch brings you 180 euro and then hesitate 2 hours.Forget the books, they are goodafteryour first 500 hours of programming and testing, learning, debugging.Get serious if you really want to program embedded C. Don't waste time as a tourist reading books and playing with simulators.

author: rdl
author_rank: Super Contributor
timestamp: January 19, 2014, 07:51:35 pm
content: Quote from: mtdoc on January 14, 2014, 12:43:12 amI signed up for this one also. I noticed you can use the Stellaris LaunchPad with it. I bought one of those when it was new and never had a chance to actually do anything with it.
An interesting comparison from the recent bush fires - Page 1
Forum section: electronics / general

author: Harvs
author_rank: Super Contributor
timestamp: January 17, 2014, 10:26:13 am
content: This isn't a rant, I just thought it was an interesting comparison between our telecommunications and power utilities with the recent bush fires in the Perth hills.So I was caught smack bang in the middle of the fires which 56 homes were lost last Sunday. I am one of the extremely lucky ones that still has a largely intact house. Lost a shed with tools and other minor damage but otherwise the efforts of our volunteer fire brigade without doubt saved us a lot of losses.Western Power, our single utility over west in three days (starting while the ground was still smoldering) has replaced over 140 power poles and restrung several kms of line, both HV and LV. Really hats off to them, it's quite amazing the scale of effort applied to pretty much replace the grid in three semi rural suburbs. Further they immediately setup a info caravan with actual techs/linesmen to talk to residents about their properties and explain exactly whats going on. Honestly you couldn't ask for more.Now onto the phones lines. Out here they're all overhead so they copped the same damage as the power lines. Lots of poles down, all the wires burnt, the same sort of scale of effort will be required as the power lines (if not more). The solution was to divert any landline numbers free of charge to mobiles, and they've been handing out free mobiles to folks that don't have them (mostly elderly people.) That's ok as a first response, infact they were really pretty good at it and responsive. But when I mentioned that it pretty much was no use to me, I needed ADSL for my business, the answer was I'd probably be looking at around 2-3 months because resorting landlines wasn't a priority. They hadn't yet even assessed what needed to be done.So I thought that was interesting, while it's obviously not an essential service like power/water etc, I didn't realise that it was so far down the priority list.

author: Rerouter
author_rank: Super Contributor
timestamp: January 17, 2014, 11:09:44 am
content: though in my head it sounds slightly like a cruel move considering free mobiles acting as phones,you may wish to push them to allow you to use one of those free phones to cover limited monthly data (if you actually had a business line they will be more willing to help with this)

author: HackedFridgeMagnet
author_rank: Super Contributor
timestamp: January 17, 2014, 11:30:04 am
content: Yes I saw similar with power poles last year. I was amazed.Only two days ( i am fairly sure) after the huge fires, new high voltage lines were run to the town of Dunalley. Nice big treated eucalyptus poles, operational.They were the only thing that wasn't black below the horizon.Glad you came thru ok.I don't know about the copper telephone wires now, who even owns them? I thought Telstra was selling them. No ADSL will be a big problem. Maybe they can just run FTTH.

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 17, 2014, 03:45:28 pm
content: Couldn't they loan out some satellite dishes?
[YouTube]: "End of an era - 1970, upminster exchange" & "The coming of the dial" - Page 1
Forum section: electronics / general

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 17, 2014, 02:49:10 pm
content: Two very interesting documentaries, documenting milestones in the British telephone network:"End of an Era 1970 Upminster Exchange""The coming of the dial (1933)"

author: atw60444
author_rank: Contributor
timestamp: January 17, 2014, 02:54:19 pm
content: My telephone exchangehttp://www.flickr.com/photos/jonathankay/sets/618707/A semi submerged repeater station. Cold War Era.http://www.flickr.com/photos/jonathankay/sets/72157633568037251/

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 17, 2014, 03:15:24 pm
content: Quote from: atw60444 on January 17, 2014, 02:54:19 pmThank youAhh, I used to have an E.P.G. 2A, too

author: atw60444
author_rank: Contributor
timestamp: January 17, 2014, 03:25:36 pm
content: @roland I'll answer you on this thread so it's on topic.No, we had cleaners to sweep up back then! It was the "4000 type" selectors which used to shake bits off. STC SE50 I think was the manufacturers name for them. They were re engineered versions of the traditional "2000 type" which turned out to be less reliable and the Post Office went back to the original design.I don't have a lot of spare selectors or banks, most everything I have is mounted on the racks. And I gave a lot of switches to a friend who was building a rack. I have some uniselectors. Depends what you're after?Jon
Found something I made back when I was into Minecraft... - Page 1
Forum section: electronics / general

author: Phaedrus
author_rank: Frequent Contributor
timestamp: January 16, 2014, 06:38:27 pm
content: http://fc01.deviantart.net/fs70/i/2012/045/0/8/minecraft_psu_1_by_phaedrus2401-d4ppjvt.pngI spent about 12 hours making a PSU in minecraft.I wish I had that sort of free time now.

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 16, 2014, 07:23:34 pm
content: Quote from: Phaedrus on January 16, 2014, 06:38:27 pm12 hours building a virtual thing which can't be used? You could have invested that time making arealoneEDIT:I'm sorry if that came across as derisory and critical- that was not what I wanted. It just seems like wasted time to me, but it's your time, and none of my business what you do with itTake care.

author: Vgkid
author_rank: Super Contributor
timestamp: January 16, 2014, 07:25:52 pm
content: Do you think that it will pass for 80+ Titanium, and join the SF-600P14TE?

author: MatCat
author_rank: Frequent Contributor
timestamp: January 16, 2014, 07:27:17 pm
content: I used to be pretty big into Minecraft, even ran a server that made it to #1 on a popular minecraft server list once. I like it hehe, but I tend to agree with the post above, it's much better to build something in reality then virtual reality, I had a lot more time on my hands when I ran that server. Redstone was a lot of fun too from a digital electronics standpoint.

author: Phaedrus
author_rank: Frequent Contributor
timestamp: January 16, 2014, 07:43:27 pm
content: Oh, I definitely agree. But at that point I wasn't capable of designing a power supply. I was also unemployed and had an abundance of free time.These days I do marginally more productive things.

author: Phaedrus
author_rank: Frequent Contributor
timestamp: January 16, 2014, 07:44:23 pm
content: Quote from: Vgkid on January 16, 2014, 07:25:52 pmNah, I went for a cheap Double Forward design with a DC-DC secondary. I'd say it could do 80PLUS Gold at best.Bronze if you went cheap on the parts...

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 16, 2014, 08:10:14 pm
content: Quote from: Phaedrus on January 16, 2014, 07:43:27 pmI don't think that I can pretend that I haven't squandered GIGANTIC chunks of my life on fruitless tasks; I have, multiple times

author: peter.mitchell
author_rank: Super Contributor
timestamp: January 17, 2014, 03:40:38 am
content: Quote from: rolandpenplotter on January 16, 2014, 08:10:14 pmLike laying out the same part of a circuit on a PCB 100 times, each near identically, just rotated 90 degrees and flipped vertically/horizontally
EEVBlog meeting @ Athens - Page 1
Forum section: electronics / general

author: kxenos
author_rank: Frequent Contributor
timestamp: January 16, 2014, 11:12:06 am
content: I'm thinking it would be a nice idea if we could set up a meeting for coffee and conversation. What do you think?

author: dr.diesel
author_rank: Super Contributor
timestamp: January 16, 2014, 11:19:32 am
content: Dave visits many electronics related shows in and around his area, often mentions talking and hanging out with fellow EEVer's. One of these events might be a good place if you'd like to meet him. He usually announces beforehand events he plans to hit.Otherwise, I suggest a group meet up in the booming, mega exciting location of Terre Haute IN.

author: romantronixlab
author_rank: Regular Contributor
timestamp: January 16, 2014, 11:29:38 am
content: Athens is a bit far for me but is sounds like a good idea.

author: EEVblog
author_rank: Unknown
timestamp: January 16, 2014, 11:42:57 am
content: I'll see if I can swing by tomorrow!

author: kxenos
author_rank: Frequent Contributor
timestamp: January 16, 2014, 12:04:52 pm
content: My intention was to ask the forum members that live in (or happen to be in) Athens, Greece if they would like to arrange a meeting!

author: xrunner
author_rank: Super Contributor
timestamp: January 16, 2014, 01:28:58 pm
content: Quote from: kxenos on January 16, 2014, 11:12:06 amYea Athens Georgia would be cool.

author: kxenos
author_rank: Frequent Contributor
timestamp: January 16, 2014, 07:28:44 pm
content: Quote from: xrunner on January 16, 2014, 01:28:58 pmWell, you can arrange for EEVBlog meeting @ Athens (Georgia)

author: Falcon69
author_rank: Super Contributor
timestamp: January 17, 2014, 02:04:19 am
content: Georgia?Only his cousins, and immediate family will be there!*ducks*
OMG way off topic but must see funny - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 15, 2014, 11:33:42 pm
content: I don't even know how I found this but as Monty Python would say, "And now for something completely different."I apologize in advance.KT

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 15, 2014, 11:34:54 pm
content: Thank youYou may like to mention that it's 40 mins long, just an idea

author: codeboy2k
author_rank: Super Contributor
timestamp: January 16, 2014, 07:25:29 am
content: that soldering iron@8:41scary@11:08

author: hiddensoul
author_rank: Regular Contributor
timestamp: January 16, 2014, 07:41:40 am
content: Quote from: rolandpenplotter on January 15, 2014, 11:34:54 pmI am glad you mentioned that, I am on restricted bandwidth for the next 36 hours as my kids used all of it up so have added it to my watch list to watch after 1am tonight when we switch over to our offpeak rate

author: Dago
author_rank: Frequent Contributor
timestamp: January 16, 2014, 12:35:41 pm
content: Quote from: hiddensoul on January 16, 2014, 07:41:40 amWith 100M unlimited internet I have to ask you (in Roy's voice from IT crown): I'm sorry but are you from the past?

author: HackedFridgeMagnet
author_rank: Super Contributor
timestamp: January 16, 2014, 12:54:14 pm
content: I guess the name 'Sanitary Can' didn't catch on. (about half way thru)

author: hiddensoul
author_rank: Regular Contributor
timestamp: January 16, 2014, 02:36:30 pm
content: Quote from: Dago on January 16, 2014, 12:35:41 pmI wish I am on 100GB daytime and unlimited offpeak, I live in the country of Australia and only our local ISP offers ADSL2 speeds via fixed wireless, the main telcos only offer ADSL1 so I have a choice unlimited ADSL1 or 100GB ADSL2 speeds over infinity wireless. Most months it is okay but my son had the clock set on his PC wrong and the torrents he was downloading of MAME roms from the internet archive ran during the day instead of off peak using 32 GB in one day.I wont even get in to how I was waiting for the NBN to bring fibre to the premise and then the new liberal government canned it when they got elected in because the I might make a trip to Canberra and beat the prime minister with a large clunky 1980's AT keyboard......

author: SeanB
author_rank: Super Contributor
timestamp: January 16, 2014, 06:46:23 pm
content: You are lucky, here I have a choice that makes Hobsons look luxurious. ADSL and limited speed, or mobile data at rates that make usury look penurious. At least with the ADSL I did spring for the uncapped option, and as a bonus with my DSLAM being mostly business it is reasonable at nights.
Apollo Earth to the Moon Navigation - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 15, 2014, 10:56:33 pm
content: Here is another NASA video from 1967 that explains quite a bit about how the navigation to the moon was done.Kind of a follow up to another post a while back.Interesting to watch.KT

author: rdl
author_rank: Super Contributor
timestamp: January 15, 2014, 11:25:25 pm
content: Have you seen the series "Moon Machines"? It is "the story of the men and women who built the machines that took us to the Moon". There are six parts, each is concerned with one of the main pieces of hardware that was required to make the trip. Part 4, "The Navigation Computer" is my favorite, followed by "The Lunar Module". There are low res versions available on YouTube.
Ampere to get redefinition - Page 1
Forum section: electronics / general

author: ron
author_rank: Regular Contributor
timestamp: January 15, 2014, 06:59:47 am
content: meh or not?http://www.nature.com/news/ampere-to-get-rational-redefinition-1.14512

author: AndyC_772
author_rank: Super Contributor
timestamp: January 15, 2014, 07:10:40 am
content: Does this mean they'll be paying for me to have all my meters recalibrated?

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 15, 2014, 07:33:03 am
content: Because we really needed it redefining...Keep it in your labs, and get on with something useful.

author: Dr. Frank
author_rank: Super Contributor
timestamp: January 15, 2014, 07:46:38 am
content: Quote from: ron on January 15, 2014, 06:59:47 amThat article is really, really bad and uninformed!Main fault: They confuse the SI-"definition" of the Ampère with "mise en pratique" (realization).Read here, much better and from 1st hand:http://www.bipm.org/en/si/new_si/why.htmlThe metrologists are planning redefinitions of the kg: quantum definition instead of artefact (@ Sèvres), and setting a fixed/exact value for h. Mise en pratique by a Si sphere and/or the Watt balance:http://www.nist.gov/pml/newsletter/siredef.cfm,as soon as the uncertainty and coincidence of both experiments fall below 2E-8. This will probably postponed again to the next meeting in 2016. (http://spectrum.ieee.org/consumer-electronics/standards/the-kilogram-reinvented/0)The Ampere would bedefinedby a fixed value of the electrical charge e, I = dQ/dt , instead by the kg (Ampère balance / force).Currently, themise en pratique(what is described in the article) directly by counting of electrons charge I = e*f (single electron charge pump) delivers too small currents to attain sufficient uncertainties (~ 1E-6 at the moment), or the "counting" errors of the charge pumps are too high.Afaik, around 10-100pA w/o pumping errors are necessary, but this still are 63 ..630 * 10^6 Elektrons/sec, not just a few ones..That means, you can at present either generate too small currents with high accuracy / zero counting error (as in the PTB experiment), or higher currents with too high counting errors.Instead, fixing of values of e and h would give absolute fixed SI units for U, R by the Josephson and the von Klitzing standards (mise en pratique). Both can be realized to 10^-16 .. 10^-19 uncertainty, and are already used in practise for electrical metrology. Uj ~ f*h/2e ; Rk ~ h/e^2Currently, the practical units of U, R differ from the SI definitions by 10^-7 ! (Josephson Volt vs. SI Volt and von-Klitzing-Ohm vs. SI Ohm). But after redefinition, no pratical recalibration is necessary, as the current definitions and realizations of U, R are closer to the real values of e,h than the uncertainty of the SI definition.After redefinition of the SI system, the Ampère would berealizedin first step by Ohms law I = U/R only.The definition I = e*f , if it would be realized by exact charge pumps, would close the Metrological Triangle, as we have 3 independent quantum experiments for the exact determination of e and h.But this step will take another 10 years, at least, I think.Frank
North American X-15 1959 to 1968 - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 14, 2014, 08:36:42 pm
content: For those of us with an space / aviation interest the X-15 is worth some reading. There is quite a bit out there on it.The X-15 set speed and altitude records that still stand today.Flights to over 350,000 feet, (over 100km) were achieved. 1963.Speeds over 4500mph, (7,200km/h). 1967.Flight control that had to transition from atmospheric flight to space flight and back. Guidance, thermal heating ect.Here is a NASA documentary from 1962 on the program.KT

author: notsob
author_rank: Frequent Contributor
timestamp: January 14, 2014, 08:48:15 pm
content: Another good read is the XB-70 program, designed to be a supersonic replacement for the B-52 but retired in the late 60's mainly due to being easily replaced by the ICBM.http://en.wikipedia.org/wiki/North_American_XB-70_Valkyrie

author: Len
author_rank: Frequent Contributor
timestamp: January 14, 2014, 08:52:59 pm
content: NASA has published a detailed history of the X-15 project:http://www.nasa.gov/connect/ebooks/aero_x15_detail.html

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 15, 2014, 01:56:22 am
content: Here is a good one on the SR-71

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 15, 2014, 02:19:05 am
content: Dave, forget the TV transmitter mate - time to get one of these
IRDA port on old laptop suitable for "UT-61E" RS232 data? - Page 1
Forum section: electronics / general

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 15, 2014, 02:00:54 am
content: HelloI have an old Dell laptop (circa 2001 - C600) running XP. It has an IRDA port built in, and I would like to take advantage of that and use it to detect my UT-61E RS232 output; would that work? I'll be piping it from the meter to the sensor via some optical fibre.Many thanks
No CGI here - Page 1
Forum section: electronics / general

author: rdl
author_rank: Super Contributor
timestamp: January 14, 2014, 09:58:18 pm
content: Devil Baby Attack

author: Zbig
author_rank: Frequent Contributor
timestamp: January 14, 2014, 10:26:28 pm
content: Hahaha, the dude at 1:00 is definitely meme-worthyI just imagined him photoshopped next to an Alien, Mechagodzilla, the shark from "Jaws", that creepy guy next door, etc. - just standing there and looking, smiling

author: lapm
author_rank: Frequent Contributor
timestamp: January 14, 2014, 10:35:36 pm
content: I just dont have words for this EVIL...

author: MacAttak
author_rank: Unknown
timestamp: January 14, 2014, 11:56:51 pm
content: So in the end, this is ultimately an ad?

author: Zbig
author_rank: Frequent Contributor
timestamp: January 15, 2014, 12:21:26 am
content: Quote from: MacAttak on January 14, 2014, 11:56:51 pmYup.

author: rdl
author_rank: Super Contributor
timestamp: January 15, 2014, 12:39:26 am
content: Yeah, I just realized that there are about 10 seconds of movie promo at the end. I guess somebody had to pay for it. I either didn't watch it all the way to the end the first time, or I was laughing so hard I missed it
Amp to be defined rationally - Page 1
Forum section: electronics / general

author: staze
author_rank: Frequent Contributor
timestamp: January 14, 2014, 06:18:19 pm
content: Hmmm...http://www.nature.com/news/ampere-to-get-rational-redefinition-1.14512Maybe "Amp Hour" will need to be renamed as the "Approximately Amp Hour". =P

author: Sionyn
author_rank: Frequent Contributor
timestamp: January 14, 2014, 06:26:02 pm
content: link to the paperhttp://arxiv.org/abs/1312.5669the fluctuating weight of KG is another 'mistake'Wear... Even at a microscopic level the it can still suffer wear as a result of otherwise imperceptible movement and is also why it's designed as it is.Since one of the most common SI units is based on however much this thing weights it's important that it be left as intact as possible. thats just ware and crudEssentially, the reference object isn't free from contamination or interacting with its environment.We don't have a mechanism which allows us to define it in a more rigorous manner which can be reproduced, so we've got this hunk of of whatever it is sitting on a shelf which is defined as the reference kilogram.

author: Sionyn
author_rank: Frequent Contributor
timestamp: January 14, 2014, 06:35:20 pm
content: i meant clumsy rather than mistake a reference book of mine defines a ampere asOne ampere is defined as the constant current which, flowing in each of the two infinitely long parallel straight conductors of negligibly small cross-sectional area, separated by a distance of 1m in vacuum, would produce a force between the wires of 2x10-7Nm-1

author: staze
author_rank: Frequent Contributor
timestamp: January 14, 2014, 07:58:21 pm
content: Yeah... it's interesting to hear it spelled out this way, since I always just knew it only as one Coulomb per second past a given point. But measuring that would be kind of hard (I guess until now).Still, kind of cool(omb).
Interesting discussion on LLC controllers - Page 1
Forum section: electronics / general

author: Phaedrus
author_rank: Frequent Contributor
timestamp: January 14, 2014, 04:06:16 pm
content: A forum I go to specializes in power supplies. Recently a few users got into a discussion about LLC resonant PSU controllers that covered a few details I wasn't aware of before. Might be handy for anyone designing an LLC resonant PSU.http://www.jonnyguru.com/forums/showthread.php?t=11320Quote
[YouTube]: Hand making valves and "nixie tubes" - Page 1
Forum section: electronics / general

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 13, 2014, 07:54:49 am
content: Amazing:Another one I found - truly lovely to see:Hand Made Vacuum Tubes by Claude Paillard

author: djococaud
author_rank: Regular Contributor
timestamp: January 13, 2014, 09:11:04 am
content: Nice tiny Spot Welder !

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 13, 2014, 09:50:38 pm
content: Quote from: djococaud on January 13, 2014, 09:11:04 amYes, isn't itI admire this man - he has a cheery, patient and methodical demeanour and is very clever.

author: c4757p
author_rank: Super Contributor
timestamp: January 14, 2014, 01:48:30 pm
content: Thank you for sharing this.I've never had the time or resources to do it myself, but I'm somewhat obsessed with hobbyists who make their own components. I love these videos

author: firewalker
author_rank: Super Contributor
timestamp: January 14, 2014, 01:56:25 pm
content: He must be using a vacuum tube camera.Alexander.
Raspberry Pi: Made in the UK by Sony - Page 1
Forum section: electronics / general

author: GeoffS
author_rank: Unknown
timestamp: January 15, 2014, 01:11:58 am
content: Original thread by Dr Diesel was deleted due to another users actions.. I thought it interesting enough to re-post.Responses from original thread cannot be recovered, sorry about that.

author: xrunner
author_rank: Super Contributor
timestamp: January 15, 2014, 01:16:28 am
content: Does China know about this operation yet?

author: GeoffS
author_rank: Unknown
timestamp: January 15, 2014, 01:18:24 am
content: Quote from: xrunner on January 15, 2014, 01:16:28 amThey would still have the Rpi gig if they hadn't stuffed up the original order.Moving assembly to Wales didn't impact the price at all - unless the RPi foundation took the hit.

author: xrunner
author_rank: Super Contributor
timestamp: January 15, 2014, 01:19:29 am
content: Quote from: GeoffS on January 15, 2014, 01:18:24 amWell I'm glad for the U.K.Way to go!

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 15, 2014, 01:25:38 am
content: Quote from: xrunner on January 15, 2014, 01:16:28 amI'd have thought so, considering the R/Pi foundation are in control of all the manufacturing facilities, and considering that the Chinese also have internet access to research these things, as we all do.
Here Be Dragons! - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: January 12, 2014, 06:32:03 pm
content: In the news today.....http://csironewsblog.com/2014/01/10/here-be-3d-printed-dragons/All now say......... "AWWWWWWWWWW".Electronics related as electron beam fusion was used to make it, and it looks so nice in the Titanium.

author: Noise Floor
author_rank: Regular Contributor
timestamp: January 13, 2014, 05:00:20 am
content: Looks like they got my letter.

author: kayvee
author_rank: Regular Contributor
timestamp: January 13, 2014, 06:39:52 am
content: It goes a little way in restoring faith in humanity

author: amyk
author_rank: Super Contributor
timestamp: January 13, 2014, 07:54:27 am
content: That's one way to get massive publicity...

author: nowlan
author_rank: Frequent Contributor
timestamp: January 13, 2014, 09:29:18 am
content: Waiting for someone to upload 'train your dragon' model to thingiverse.I hadnt heard of titanium 3d printing either.

author: digsys
author_rank: Unknown
timestamp: January 13, 2014, 10:23:56 am
content: Quote from: nowlanThey printed a selection of steering assembly, wheel hub parts for us a year ago. VERY impressive technology.I'll upload some pix when I get a minute.

author: nowlan
author_rank: Frequent Contributor
timestamp: January 13, 2014, 10:34:58 am
content: This takes the cake.This New 3D Printer Can Print Out Cake, Candy, And Cupcakes

author: Frost
author_rank: Regular Contributor
timestamp: January 13, 2014, 11:06:14 am
content: Quote from: nowlan on January 13, 2014, 09:29:18 amThe process is called Selektives Laserschmelzen or selective laser melting.It was invented/first used 1995 at the Fraunhofer Institute ILT in Aachen.http://en.wikipedia.org/wiki/Selective_laser_meltingToday, for example, it's used more and more to manufacture metal insertsfor prosthetic devices as an alternative to 5-axis CNC milling.

author: lowimpedance
author_rank: Super Contributor
timestamp: January 13, 2014, 11:09:29 am
content: Quote from: amyk on January 13, 2014, 07:54:27 amCSIRO certainly needs it and what a feel good story to do it with.

author: peter.mitchell
author_rank: Super Contributor
timestamp: January 13, 2014, 11:19:28 am
content: I think this is where the REAL advances are going on;
Teardown Videos - Page 1
Forum section: electronics / general

author: Forser
author_rank: Contributor
timestamp: January 12, 2014, 09:27:49 pm
content: Greetings,Been watching a lot Dave's teardown videos and i wonder if the caps and such that he finds on the different machines are reusable or they are pure junk?I recently started out with electronics and a lot of machines has a lot of parts that could be used for different things.Best RegardsMarcus

author: mariush
author_rank: Super Contributor
timestamp: January 12, 2014, 11:22:56 pm
content: They are reusable but not recommended to be used only for personal project, hobbies etc.Capacitors degrade with heat and time of operation and since often you don't know in what conditions that device lived its life,you can't trust them for anything serious.

author: dr.diesel
author_rank: Super Contributor
timestamp: January 12, 2014, 11:29:42 pm
content: Don't forget lots of other good stuff:- heatsinks- voltage regulators- connectors- transistors- inductors- LEDs, 8-segs, etc- etcIf you don't have one, get a 1/2 descent through hole desoldering iron such as the Hakko 808, don't even bother with the $10 POS at radioshack.

author: peter.mitchell
author_rank: Super Contributor
timestamp: January 13, 2014, 04:37:15 am
content: I gotta say, inductors/toroids and transformers are probably my most desirable "loot". You re-wind them, to your desired values ect, that and you don't *usually* have so many random ones lying around.
Coin cell (industrial temperature range) - Page 1
Forum section: electronics / general

author: EPC-EPDAC
author_rank: Newbie
timestamp: January 14, 2014, 04:01:13 pm
content: A quick scan of the specification for CR2032 coin cell shown -30 C minimum. I'm looking for a 20mm cell that will operate at -40C.Does anyone know if anyone sells coin cells rated for -40C?

author: peter.mitchell
author_rank: Super Contributor
timestamp: January 15, 2014, 07:16:58 am
content: Even though they show -30C minimum, they are seriously de-rated at those temperatures, the same with -40C, they just specify they will operate at those temperatures. Their capacity and current output drop dramatically, and their voltage sags a little too.
[YouTube]: The Manufacture of Radio Valves - Presented by Mullard - Page 1
Forum section: electronics / general

author: rolandpenplotter
author_rank: Regular Contributor
timestamp: January 12, 2014, 04:57:29 pm
content: Very interesting viewing:Mullard - The Blackburn Vacuum Tubes Factory (Full)The Manufacture of Radio Valves - Presented by Mullard
Mars Viking Program 1976 - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 11, 2014, 12:21:54 am
content: If you are interested this is an interesting read. Covers the Viking Mars lander missions in 1976 with prehistory.There is quite a bit of technical detail on the landers themselves which is interesting. Chapter 8.Pretty advanced stuff for when it was done.http://www.hq.nasa.gov/office/pao/History/SP-4212/contents.htmlKT

author: dr.diesel
author_rank: Super Contributor
timestamp: January 11, 2014, 12:28:48 am
content: I was just wondering what I was gonna read next, thanks for posting!

author: codeboy2k
author_rank: Super Contributor
timestamp: January 11, 2014, 07:30:19 pm
content: Quote from: dr.diesel on January 11, 2014, 12:28:48 amWhat? you mean you haven't finished the Internet yet ... come on, hurry up... I hear the ending is quite good !
Iron Man: Powered by Lego Mindstorms - Page 1
Forum section: electronics / general

author: 8086
author_rank: Super Contributor
timestamp: January 12, 2014, 07:06:43 pm
content: http://deeperdesign.wordpress.com/2010/02/26/is-iron-man-made-of-lego/

author: SolarSunrise
author_rank: Regular Contributor
timestamp: January 12, 2014, 08:30:26 pm
content: Did you know that the terminator had a 6502 processor from Apple?http://www.pagetable.com/?p=64

author: SeanB
author_rank: Super Contributor
timestamp: January 12, 2014, 08:34:42 pm
content: Just about every hard drive has a 6502 in a core inside it, used as a bootstrap processor and watchdog. Refer to free electron's posts on hard drives.

author: SolarSunrise
author_rank: Regular Contributor
timestamp: January 12, 2014, 09:24:37 pm
content: Quote from: SeanB on January 12, 2014, 08:34:42 pmOh, so the Terminator has a hard drive for its memory? Hmm what a flawed design for a military defense application! Why not SSD or some quantum memory device?Sorry if I sounded sarcastic... I just couldn't help it

author: SeanB
author_rank: Super Contributor
timestamp: January 13, 2014, 04:58:20 am
content: Even that will need a bootstrap controller to start it up, or to recover from a soft failure.
Who uses "[Add To Buddy List]" - Page 1
Forum section: electronics / general

author: wilfred
author_rank: Super Contributor
timestamp: January 11, 2014, 03:44:17 am
content: .

author: GeoffS
author_rank: Unknown
timestamp: January 11, 2014, 03:48:12 am
content: I don't know of anyone who uses the buddy list and you're right, you should have the option to add to ignore list as well as it's much more likely to be usedTo ignore a users, you have to do so through editing your profile.

author: marmad
author_rank: Super Contributor
timestamp: January 11, 2014, 04:43:53 am
content: Quote from: wilfred on January 11, 2014, 03:44:17 amI use it - although not specifically for "buddies"; I add people to it that I converse with regularly. Since it 'bolds' the members' names who are in it, you can use it as quick way to see if those members are online - by just looking at the 'Users Online' list on the index page.

author: deth502
author_rank: Frequent Contributor
timestamp: January 11, 2014, 08:31:16 am
content: i didnt come here to make friends...and im winning!!!

author: codeboy2k
author_rank: Super Contributor
timestamp: January 11, 2014, 08:57:22 am
content: I've used the add to buddy list before.Ignore is easy. I just don't read themWhat I'd like to see is in fact a contributer or posting scoring system. Where we can vote up a post as containing useful information, and a poster thus gains "karma" for good posts. ( I think there's another thread someone started already about that )
Important question to Dave (not really electronics related - sorry) - Page 1
Forum section: electronics / general

author: Herr R aus B
author_rank: Regular Contributor
timestamp: December 17, 2013, 01:18:07 pm
content: Dave - this question is seriously meant - what would you prefer looking at:( ) Blossoms( ) Insects( ) FireworksThis is no spam - it's just one cross to set :-)Regards & thanks in advanceAxel

author: dr.diesel
author_rank: Super Contributor
timestamp: December 17, 2013, 01:23:55 pm
content: Mmmmmm:

author: EEVblog
author_rank: Unknown
timestamp: December 17, 2013, 01:31:27 pm
content: Blossoms.Did I pass the psych test, or am I batshit crazy?

author: dr.diesel
author_rank: Super Contributor
timestamp: December 17, 2013, 01:35:27 pm
content: Quote from: EEVblog on December 17, 2013, 01:31:27 pmYou pass.

author: kxenos
author_rank: Frequent Contributor
timestamp: December 17, 2013, 01:50:26 pm
content: dr. these are bosoms, not blossoms..I mean there are some blossoms too there but they're mainly irrelevant...

author: Herr R aus B
author_rank: Regular Contributor
timestamp: December 17, 2013, 01:51:55 pm
content: Thanks - the results of the psych test *grin* will show up in your mailbag in approx 2 weeks ;-)

author: Herr R aus B
author_rank: Regular Contributor
timestamp: January 10, 2014, 01:48:50 pm
content: Should have arrived somewhere in that huge pile of due mail items by now

author: aargee
author_rank: Frequent Contributor
timestamp: January 10, 2014, 10:35:57 pm
content: Quote from: dr.diesel on December 17, 2013, 01:35:27 pmSo, that's what happens when you swallow cherry seeds!
Pioneer Amp. Motorized Volume Arduino Retrofit - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: July 13, 2013, 07:13:10 pm
content: Greetings EEVBees:--This Scotsman, Ian Johnston makes very intelligible videos, of DJ quality. Here he retrofits a Pioneer amplifier for motorized volume control, using an Arduino. I thought some of you might enjoy."If you build a better mousetrap, you will catch better mice."George Gobel 1919 1991Best RegardsClear Ether

author: peter.mitchell
author_rank: Super Contributor
timestamp: January 10, 2014, 04:38:54 pm
content: I stumbled across this guys youtube channel and I quite like his stuff, I thought i'd do a forum search for him and this thread turned up.His videos are well spoken, interesting and just all round quite nice!I know the OP is old, I know this is a Necro bump, BUT, i feel this thread didn't get enough of a look (the naming might be a key).

author: pickle9000
author_rank: Super Contributor
timestamp: January 10, 2014, 04:57:33 pm
content: I agree he is worthwhile watching.

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 10, 2014, 08:39:27 pm
content: I'm surprised they didn't use switched jacks to automatically bypass the external equalizer. And why use a servo assembly instead of replacing the volume control with a rotary encoder and using a volume control chip?
Not quite Howerboard, ..  - Page 1
Forum section: electronics / general

author: JoannaK
author_rank: Frequent Contributor
timestamp: January 09, 2014, 06:40:10 pm
content: Onewheel.http://www.kickstarter.com/projects/4422853/onewheel-the-self-balancing-electric-skateboard

author: Maxlor
author_rank: Frequent Contributor
timestamp: January 09, 2014, 09:23:40 pm
content: I love those self-balancing things. I should really get a Solowheel. Or an SBU. I'm not all that taken by the skateboard form factor, but that's personal preference I guess.
Random uselss info - Page 1
Forum section: electronics / general

author: Gromitt
author_rank: Regular Contributor
timestamp: January 08, 2014, 04:32:14 pm
content: For almost exactly two years ago (2011-12-28) I bought the old µCurrent from Dave. The price was AUD 62.45 inkluding postage. Then the Oz $ was worth SEK 7.28.Now with the µCurrent Gold for AUD 91 (inkl postage) the exchange rate was SEK 5,86.In two years (+/- a day or two) the Australian Dollar has lost almost 20% against the Swedish krona.Just some useless informationStefan

author: peter.mitchell
author_rank: Super Contributor
timestamp: January 09, 2014, 06:30:30 am
content: thismight be interesting to you.
Nixie, Solar, Sinclair, wristwatch, all rolled into one - Page 1
Forum section: electronics / general

author: staxquad
author_rank: Frequent Contributor
timestamp: January 09, 2014, 12:28:47 am
content: Nixie, Solar, Sinclair, wristwatch, all rolled into oneand only US $1,150.00 each (sold 6 of them already (I'm in shock))from Sydney, AustraliaKopriso Mi Esposita Solar Powered Nixie Tube Watch wristwatchhttp://www.ebay.com/itm/Kopriso-Mi-Esposita-Solar-Powered-Nixie-Tube-Watch-wristwatch-/251418111933?pt=Wristwatches&hash=item3a89afefbd

author: PaulAm
author_rank: Frequent Contributor
timestamp: January 09, 2014, 12:37:16 am
content: Some guy made a decent living selling a 2 tube Nixie watch. There's a video floating around with Wozniak showing off his model.Since the tubes are 1/2 inch in diameter, it's not exactly a small form factor.

author: Mr Smiley
author_rank: Frequent Contributor
timestamp: January 09, 2014, 03:07:58 am
content: And it's go a"Hand assembled electronic movement"Wow

author: staxquad
author_rank: Frequent Contributor
timestamp: January 09, 2014, 03:56:43 am
content: Quote from: Mr Smiley on January 09, 2014, 03:07:58 amIt's the kind of watch someone would wear while driving his Sinclair C5.
J. Birkett's shop - Page 1
Forum section: electronics / general

author: steve30
author_rank: Frequent Contributor
timestamp: January 09, 2014, 05:28:25 pm
content: Does anyone here ever visit J. Birkett's shop on The Strait in Lincoln?I found the shop by accident when I first visited Lincoln in 2008, and every time I have visited since then, I have been sure to go and have a nosy through the window. I've never bought anything, but I do like to have a look. It is one of the few shops which has items in the window which I find really interesting. There were a couple of nice looking AvoMeters the other day.

author: G7PSK
author_rank: Super Contributor
timestamp: January 09, 2014, 06:42:49 pm
content: Went there about five years ago when on holiday but not been back since, it is certainly an Aladdin's cave, my wife who was with me at the time would not let me spend much but then we had to traipse around all the cloths shops and spend a fortune.There is a shop in Cambridge that is also a treasure call H Gee spent half my youth there.http://www.cambridgeonline.co.uk/listings/13566/

author: BurtyB
author_rank: Regular Contributor
timestamp: January 10, 2014, 10:36:10 am
content: I normally have a look when I'm in Lincoln (only live ~20 miles away but haven't been in a few years).Anyone know if they still only open a couple of days a week?

author: steve30
author_rank: Frequent Contributor
timestamp: January 10, 2014, 07:40:45 pm
content: I think the sign said they were open most days, but I have only been on Saturday.