hybridfree/eevblog-posts huggingface dataset:
For your amusement - an animation of circuit simplification - Page 1
Forum section: electronics / general

author: Ducttape
author_rank: Regular Contributor
timestamp: January 30, 2017, 04:46:58 pm
content: A few weeks back someone posted a question regarding how to solve a simple series-parallel circuit. I didn't respond at the time but it bothered me that I've never seen (and I've looked) a clear description of the basic algorithm you go through to solve this type of problem.Well, I gave it a shot but I'm sure there are examples where the algorithm falls short. It's a start.Basically:1. Identify each node2. Identify component pairs that share the same 2 nodes.3. redraw the connecting lines to clarify the parallel relationship.4. all serial relationships can be solved once all parallel relationships are simplified.I would have put this in the beginners forum but technically it's not a question, so I put it here. I would have just attached the gif but it's a couple of MB, so too big.At least it's kind of fun to watch.https://www.youtube.com/watch?v=5IiFmQQuiO8&feature=youtu.be

author: rstofer
author_rank: Super Contributor
timestamp: January 30, 2017, 05:10:04 pm
content: Don't forget 'rinse and repeat'. Components in parallel will simplify then add to components in series all in parallel with ....I like the node coloring. In fact, I REALLY like the node coloring!

author: Ducttape
author_rank: Regular Contributor
timestamp: January 30, 2017, 05:20:10 pm
content: Quote from: rstofer on January 30, 2017, 05:10:04 pmYou're right. Doing an animation takes more work than I originally expectedso I left out some stuff.
Hydrogen Into A Superconductor? - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: January 29, 2017, 02:18:35 pm
content: https://au.finance.yahoo.com/news/80-old-prediction-may-come-192541642.htmlLOL at a critic of the experiment, he doesn't muck around:Quote

author: Kleinstein
author_rank: Super Contributor
timestamp: January 29, 2017, 02:33:21 pm
content: If if Hydrogen would be a room temperature superconductor at that pressure - it would not really matter. It is much easier to cool down to 4 K than to have such a high pressure.So all the talk about superconductivity is not really relevant in this context. Still an interesting result, though is should be confirmed from a second group.

author: firewalker
author_rank: Super Contributor
timestamp: January 29, 2017, 02:38:45 pm
content: There is great skepticism for this paper, but calling it garbage... I don't know...Alexander.

author: PA0PBZ
author_rank: Super Contributor
timestamp: January 29, 2017, 02:47:16 pm
content: Quote from: Kleinstein on January 29, 2017, 02:33:21 pmDid you read the article?It is also possible that metallic hydrogen material may be "metastable," according to Science Magazine. This means that, once formed, it may retain its metallic properties even at normal temperatures and pressure levels, like diamonds.

author: SeanB
author_rank: Super Contributor
timestamp: January 29, 2017, 03:26:13 pm
content: I doubt it will be room temperature, but might be metastable at liquid nitrogen temperatures, which are a lot easier to achieve than liquid helium temps. Of course if they get warm and decompose then you suddenly have to deal with what was a metal and is now a gas, and with a high current you will have a massive arc lamp in hydrogen, and very shortly afterwards a very exothermic and spreading reaction as well.

author: Vtile
author_rank: Super Contributor
timestamp: January 29, 2017, 03:35:32 pm
content: http://www.sciencemag.org/news/2017/01/diamond-vise-turns-hydrogen-metal-potentially-ending-80-year-quest

author: Kleinstein
author_rank: Super Contributor
timestamp: January 29, 2017, 06:09:01 pm
content: Even if the metallic hydrogen would be metastable at liquid nitrogen temperature (I very much doubt that), there would be quite some problems using it as a superconductor: How to make contacts and how to get parts larger than 1 mm from those miniature diamond cells.There are way more practical superconductors at 77 K. They even can make squids to run at 77 K.Still, if true this is a kind of important discovery, though more for the basics, not for any practical application.
Great news for Aussies from Digikey - Page 1
Forum section: electronics / general

author: VK3DRB
author_rank: Super Contributor
timestamp: January 30, 2017, 11:15:35 am
content: Digikey has dropped the free shipping threshold from AU $200 to $60, and the shipping charge has dropped to $24 if the total purchase price is under $60.Thanks, Digikey. Overdue but much appreciated.As usual, Digikey continues to provide outstanding service. I ordered a swag of components Thursday at around 5pm. They were delivered to my office this morning (Monday). As usual, not one part missing or wrong. A bonus was I uploaded the BOM into Digikey from an Excel spreadsheet generated by Altium and Digikey marked the component designators on each pack to help the technician easily ID parts and start building some prototypes. How good is that!It is rumoured Trump fulfilled his election promise immediately after the inauguration, "We will have Digikey to reduce the shipping costs of components to Australia... and get Mexico to pay for it."

author: Psi
author_rank: Super Contributor
timestamp: January 30, 2017, 11:30:09 am
content: Looks like for digikey orders to New Zealand the minimum has dropped from $125 to $66The old system never made much sense to me, why was the free shipping thresholds AUS$200 and NZD$125 when the AUS dollar is worth a little more than NZD.Not that i was complainingNow that its AUS$60 and NZD$66 it makes much more sense.

author: digsys
author_rank: Unknown
timestamp: January 30, 2017, 12:18:18 pm
content: Hopefully it is due to the $60 limit that Mouser has had for quite a while. I've certainly rubbed it in their face many times :-) .. I've had many cases where - for NOreason they've ever explainedproperly, they suddenly decided to charge freight AFTER I finalized the order ... but that's another long story :-)

author: gamalot
author_rank: Super Contributor
timestamp: January 30, 2017, 12:28:38 pm
content: FREE SHIPPING on Orders of $60 AUD and greater!
'Lamps and Tubes' retro site - Page 1
Forum section: electronics / general

author: TerraHertz
author_rank: Super Contributor
timestamp: January 29, 2017, 11:39:56 am
content: http://lampes-et-tubes.info/index-e.htmHopefully not a repost. What an amazing collection!Found while looking for data on this Deuterium lamp. Yes, also in the pile from Melbourne.

author: VK5RC
author_rank: Unknown
timestamp: January 29, 2017, 01:10:08 pm
content: Truly an amazing collection!Thanks for posting.Robert

author: james_s
author_rank: Super Contributor
timestamp: January 29, 2017, 06:41:31 pm
content: Hey that's a good one, great collection.One of my favorite sites on the topic ishttp://lamptech.co.uk/
Ebay APDS-9960 Gesture sensor - Page 1
Forum section: electronics / general

author: cheetahkid
author_rank: Newbie
timestamp: January 28, 2017, 08:07:44 pm
content: I did buy some APDS-9960 Gesture sensor and found none of them works as Gesture, meaning they put in wrong parts, I found 4 of those is a APDS9930 (the lens looks white rather than tiny chip) and 2 of the unsure it is working (software problem?) and it possible is an APDS-9950... I just give up buying them off Ebay. As anyone find that problem?Is there other Gesture sensor I might look up?
Mercury-Atlas Vernier Motor - those stepper motors seem familiar... - Page 1
Forum section: electronics / general

author: cprobertson1
author_rank: Frequent Contributor
timestamp: January 27, 2017, 08:02:10 am
content: So while experiencing the delight of awikipedia trawl(that is when you start recursively clicking links in articles and then end up with a thousand pages open1.Eventually, having started on a page relating to GUIs, I somehow ended up looking at vernier rocket motors: and I came across the Mercury-Atlas Vernier motor assembled in 1960 - and those stepper motors immediately jumped out at me, as they look remarkably similar to modern stepper motors!Does anybody else know roughly when stepper motors started taking on that sort of form factor, or anything much about their history? It's pretty interesting seeing what looks like a modern stepper motor on a 58 year old piece of kit (granted, a piece of kit used for throwing nukes across the planet... granted, even though it's used for blowing stuff up - it's still a very interesting piece of kit: one that will probably have me -playing Kerbal Space Program tonight because, lets face it - rockets are awesome)1The page order was "Graphical Interface Design > Human-Computer Interaction > User Interface > Apollo Guidance Computer > Apollo Command Module > Gyrocompass > Reaction control system > Attitude Control > Vernier Thruster > Mercury-Atlas" if anybody is interested

author: BradC
author_rank: Super Contributor
timestamp: January 27, 2017, 08:20:18 am
content: http://www.aussieinvader.com/the-car/the-rocket-engineRockets are awesome. This one is going together not far from me.I've seen steppers in those form factors in kit that old but I've not been inside anything much older.

author: amyk
author_rank: Super Contributor
timestamp: January 27, 2017, 04:19:08 pm
content: The type of stepper motor seen there has certainly been around for a while -- look up "NEMA standard motor sizes" for some more info.

author: cprobertson1
author_rank: Frequent Contributor
timestamp: January 28, 2017, 10:20:19 am
content: Quote from: amyk on January 27, 2017, 04:19:08 pmOooh! It's actually a NEMA motor!? Ha, I took one look at the bundle of cables coming off it and said "nah, can't be a NEMA" (forgetting that NEMA also specifies the form factor!)I'll nee to have a good look around and see when these form factors first came about (just out of morbid curiosity) - The earliest mention I've found so far is '61, which was in relation to that rocket engine: but I reckon they may have been around before then - a lot of the papers on standards I've found don't have dates on them so it's difficult to actually figure out when the standard was introduced -.-
Complete overview of Resistor Values, Power and Footprints? - Page 1
Forum section: electronics / general

author: onesixright
author_rank: Frequent Contributor
timestamp: January 26, 2017, 09:10:58 pm
content: Anybody has a good reference for a complete (or near complete) reference/overview of available resistor sizes, power and footprints?I did try to google this buy all i good find what a few tables (E12, E24, etc). Also searched eevblog, couldn't find it

author: bktemp
author_rank: Super Contributor
timestamp: January 26, 2017, 09:32:28 pm
content: https://en.wikipedia.org/wiki/Surface-mount_technology#Two-terminal_packages

author: KhronX
author_rank: Frequent Contributor
timestamp: January 28, 2017, 01:47:48 pm
content: https://en.wikipedia.org/wiki/E-series_of_preferred_numbersI just searched for "e-series" on wikipedia...
Got to take a personal tour of a real prototyping lab, fun stuff - Page 1
Forum section: electronics / general

author: Justin_
author_rank: Newbie
timestamp: January 27, 2017, 06:38:20 am
content: So one of my mother's ex boyfriends (before she met my dad) works at a high end audio company that does work for everything from theaters to football stadiums to freaking Disneyland and is one of the main guys there. So myself and my mother happens to be in town so we met up with him and he gave me a tour of their place, including their prototyping lab and it was awesome to see, it is one of those companies (Like Google) where you do need to get stuff done, but are free to have fun and that made the place even better.Anyway, there was one thing that I noticed that was really interesting. You know how equipment will be rated at something like -20 to 120 degrees, well do you know how they test that??They went and bought a chest freezer from Home Depot or something, drilled a 2" hole in it to run cables, and then they modified the controller (and presumable added some sort of heater) so that they can precisely control the temperature in the box for testing.Anyway they are one of those "Designed in America, Manufactured in China" places, but it was still really cool to see.

author: ZeTeX
author_rank: Frequent Contributor
timestamp: January 27, 2017, 05:32:53 pm
content: it works I guess

author: Christopher
author_rank: Frequent Contributor
timestamp: January 27, 2017, 06:02:33 pm
content: Quote from: Justin_ on January 27, 2017, 06:38:20 amNot for long..!
IOT 'sous vide' cooker device reverse engineering video - Page 1
Forum section: electronics / general

author: 0b01010011
author_rank: Regular Contributor
timestamp: January 27, 2017, 05:06:51 am
content: Not my video, but I thought this was a very interesting video on an IOT 'sous vide' cooker (!) reverse engineer:What I could not beleive was:- that it's an Internet connected COOKER with no security- that they cheaped out on the wifi module, and it doesn't support DNS - so the company's IoT server is a hardcoded IP address. They change that IP and every device doesn't work!I don't own one of these, I just found this particular video interesting.

author: coppice
author_rank: Super Contributor
timestamp: January 27, 2017, 07:04:38 am
content: While very crude and flawed, the design does make it easy to intercept traffic and use your own local server.
Asus ROG Maximus IX Formula & Code Z270 Motherboard Review & Comparison  - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 26, 2017, 05:38:45 pm
content: Z270 boards are out now with the Kaby Lake.Here is a review / comparison of two of the high end boards from ASUS.I built my new system in February of last year, 6700K on an ASUS MAXIMUS VIII HERO.Little to no performance boost on the new platform other than built in 4k decoding.
SaS project management/book-keeping software - Page 1
Forum section: electronics / general

author: Harvs
author_rank: Super Contributor
timestamp: January 27, 2017, 11:25:52 pm
content: I run a small business that does contract design work for a number of clients.I'm looking for a web based project management tool (schedule tracking, hours spent, costs, etc) that allows me to provide viewing rights for specific projects to each client. Sort of a blend between typical PM functions and book keeping. I want to also produce invoices out of it each month, but if it just has some sort of API (or access to backend db) that I can automate pulling data and produce my own that's fine.I could write something myself, but by the time I pay for my development hours, maintenance hours and hosting costs it's unlikely to be cost effective if there's something already on the market.Any recommendations would be appreciated.
Introduction to the Netherlands Trump style - Page 1
Forum section: electronics / general

author: nctnico
author_rank: Super Contributor
timestamp: January 24, 2017, 12:48:03 pm
content: This just made me laugh out loud:

author: continuo
author_rank: Frequent Contributor
timestamp: January 24, 2017, 01:03:33 pm
content: Geweldig

author: joseph nicholas
author_rank: Frequent Contributor
timestamp: January 24, 2017, 04:32:56 pm
content: They left out the part about the cleanest prostitutes and strongest weed.

author: vodka
author_rank: Frequent Contributor
timestamp: January 24, 2017, 07:39:11 pm
content: Will the dutch president wear a pussycat like toupee?https://youtu.be/2fKJJcXafUw

author: ECEdesign
author_rank: Regular Contributor
timestamp: January 25, 2017, 01:21:40 am
content: The more I hear about the NL the more I want to move there...Think they need another EE?

author: continuo
author_rank: Frequent Contributor
timestamp: January 25, 2017, 03:22:43 pm
content: LOL, someone started an online petition to make the Netherlands officially second. This is getting better and betterhttps://petitions.whitehouse.gov/petition/america-first-make-netherlands-second-because-they-requested-it

author: timothyaag
author_rank: Contributor
timestamp: January 25, 2017, 04:02:59 pm
content: Can't avoid Trump on any of the websites I frequent.
Looking for old UK VCR & CRT TV service magazines as PDF, please? - Page 1
Forum section: electronics / general

author: switchedmodepsu
author_rank: Regular Contributor
timestamp: January 25, 2017, 11:45:13 pm
content: Hello everyone.I am looking for old UK VCR & CRT TV service magazines as PDF, please? I am an ex TV/VCR service engineer and would like to peruse a few copies of old UK TV/VCR service magazines, and I cannot seem to find any via Google (I can't even recall what the name of the magazine my old boss used to subscribe to, is/was.)Many thanks.

author: tronde
author_rank: Frequent Contributor
timestamp: January 26, 2017, 01:03:07 am
content: Closed down about 2006 I think.Only a few very old issues available as pdf.https://archive.org/details/practical_television

author: switchedmodepsu
author_rank: Regular Contributor
timestamp: January 26, 2017, 01:17:34 am
content: Quote from: tronde on January 26, 2017, 01:03:07 amThanks mate!Where did the 1990 thumbnail come from? The archive.org link doesn't hold a 1990 copy.

author: tronde
author_rank: Frequent Contributor
timestamp: January 26, 2017, 02:24:43 am
content: Quote from: switchedmodepowersupply on January 26, 2017, 01:17:34 amSorry. Forgot to insert the link.http://www.t-m-f.uk

author: CJay
author_rank: Super Contributor
timestamp: January 26, 2017, 08:31:06 am
content: 'tis a bit difficult to find those old mags via Google as the most popular one was called Television, completely non unique so Google throws up all sorts of rubbish.They do turn up at car boot sales and radio rallies for pennies...
Request For Browser Extension:  Make Firefox Look Like The Google Spider - Page 1
Forum section: electronics / general

author: JoeN
author_rank: Frequent Contributor
timestamp: January 25, 2017, 09:55:23 am
content: Ever have this happen? You search for something and Google gives you a nice synopsis of exactly what you are looking for and a link and you follow the link and immediately hit a paywall? I was looking for "28nm gate capacitance" out of curiosity. Google gives this synopsis: 24.7 A High-Performance, High-Density 28nm eDRAM ... - IEEE Xploreieeexplore.ieee.org/iel5/6123666/6131464/06131608.pdfMetal-Insulator-Metal (MIM) capacitor and integrated into. 28nm High-K Metal Gate (HKMG) logic technology. This. eDRAM memory features an HKMG CMOS ...When you follow the link:http://ieeexplore.ieee.org/iel5/6123666/6131464/06131608.pdfAn immediate paywall. And the words above are not even hidden in the HTML. How did Google read the PDF in order to index it properly?I don't know, but I bet the web server is giving up the content if it thinks you are Google. But unless it is going off of known IPs, the only way to know what is at the end of an HTTP connection is by the headers, which can be anything you want them to be.Hmmm.....

author: Jeroen3
author_rank: Super Contributor
timestamp: January 25, 2017, 10:00:58 am
content: One can submit the pdf to google to index without the crawler finding it himself.

author: NottheDan
author_rank: Frequent Contributor
timestamp: January 25, 2017, 10:28:04 am
content: Look for a User Agent switcher addon for your FF and use it to switch your browser's identification to on of the robots when needed.https://addons.mozilla.org/en-GB/firefox/addon/user-agent-switcher/

author: amyk
author_rank: Super Contributor
timestamp: January 25, 2017, 12:20:26 pm
content: Most of these use IP; I believe there was a way using one of Google's services as a proxy, but I don't know if that route has been blocked now. Even Google Translate used to work. Do some searching for more information on that... of course, for articles like that one, check SciHub/Libgen.

author: tom66
author_rank: Super Contributor
timestamp: January 25, 2017, 12:25:16 pm
content: Google penalises websites that present different content to their spiders...if you find a paywalled article try copying the title into Google and you'll often get access to it. If you don't, then Google should be seeing the same summary you get.
Celluma Led panel bull crap - Page 1
Forum section: electronics / general

author: rymste
author_rank: Newbie
timestamp: January 24, 2017, 04:28:37 am
content: I found this website claiming that there $1600 led panel will cure acne, aging and pain just by shining a led on your skin. Here is the link you can check it out if you want.http://biophotas.com/product/celluma-pro/

author: ataradov
author_rank: Super Contributor
timestamp: January 24, 2017, 05:02:56 am
content: So you registered just for this? Looks like typical spammer behavior.

author: rymste
author_rank: Newbie
timestamp: January 24, 2017, 05:21:46 am
content: This is my first forum post, i am sorry if i sound like a spamer. I just enjoy the electronics hobby and thought some people might get a laugh out of it.

author: Tinkerer
author_rank: Frequent Contributor
timestamp: January 24, 2017, 07:22:09 am
content: Actually there are commercials on tv currently for something very similar. Except its a mask you wear and isnt anywear near as bulky as that.

author: m98
author_rank: Frequent Contributor
timestamp: January 24, 2017, 02:06:18 pm
content: Just because you don't have a clue, you shouldn't call something "bull crap".There seems to be no significant clinical evidence for LED-Therapy, but there are many smaller studies where it did show a significant effect.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2923954/https://www.ncbi.nlm.nih.gov/pubmed/27670126
How do you keep up to date on new components? - Page 1
Forum section: electronics / general

author: Aeternam
author_rank: Unknown
timestamp: January 23, 2017, 07:22:09 pm
content: Title says it all: what's your source of information about new developments in the components industry (new opamps, new transistors, ICs etc...)? Vendor newsletters? Magazines (which one??)Do you even care?

author: nctnico
author_rank: Super Contributor
timestamp: January 23, 2017, 07:33:41 pm
content: I learned not to care because many new and special components are unobtanium for the low volume products I make. I just go to a manufacturer's website and go through the selection tree to find a part which matches my requirements. When found I check whether it is in stock at Farnell, RS, Mouser or Digikey to see if it is somehow popular (and thus hopefully available for the years to come). When not available I look for a different part.

author: Nystemy
author_rank: Contributor
timestamp: January 24, 2017, 05:41:47 am
content: I normally go to Digikey, mouser and the like and see what they have, read random data sheets and mostly poke around. It is rather easy to stumble onto stuff if one just looks.If I find a strange sounding type of component, then I normally look into it, and usually learn something new and interesting along the way. Though, 95% of the time it is totally useless information. And less then 1% of the time I actually find something I could use.Easiest thing I know of is to simply ask if anyone knows of a component that have a particular behavior.
What is Inside USB Ethernet Extenders? - Page 1
Forum section: electronics / general

author: gudenau
author_rank: Regular Contributor
timestamp: January 12, 2017, 03:49:47 am
content: I want to know what is inside the USB Ethernet extenders that allow the signal to travel over the 5 meter limit. Is it just the greater signal integrity of the CAT cables or are there electronics inside? I've wondered for a long time.

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 12, 2017, 04:17:10 am
content: The good ones will repeat the signal, while the cheap ones are likely just be adapters and won't work over a long distance. And then there's USB over IP, which can run on a Raspberry Pi or similar.

author: amyk
author_rank: Super Contributor
timestamp: January 12, 2017, 12:10:35 pm
content: AFAIK the length limits are due to propagation delay and timeouts --- if the cable is too long the signal takes too long to get to the other end. It would have to be something like a hub on each end to get past that limit.

author: cdev
author_rank: Super Contributor
timestamp: January 13, 2017, 02:18:14 am
content: The two USB extensions that I have both enumerate as hubs.

author: Cerebus
author_rank: Super Contributor
timestamp: January 15, 2017, 02:21:03 am
content: Quote from: NiHaoMike on January 12, 2017, 04:17:10 amAnd probably have some adaptive equalization (preemphasis, deemphasis pairs), something like the chips National (now TI) sold for DVI/HDMI.

author: gudenau
author_rank: Regular Contributor
timestamp: January 17, 2017, 02:16:33 am
content: So it would be best to hijack an existing product in my own project in this case eh?

author: cdev
author_rank: Super Contributor
timestamp: January 23, 2017, 08:09:34 pm
content: There are devices/software that extend USB using TCP-IP and "Ethernet" too. Thats what I thought you meant the second time I read the title of your post.

author: Stonent
author_rank: Super Contributor
timestamp: January 24, 2017, 03:22:47 am
content: I've taken them apart, the PC end is just a standard USB to Ethernet device with an ASIX chipset and some custom software loaded on the PC. It sends out a bunch of broadcast TCP/IP network traffic that I've sniffed with a packet sniffer. When the other end is not there, it just repeats the same packets over and over until it gets a response.The other end is just receiving it and sending it back to the USB device.I've used the PC side of them as a ad-hoc USB nic when I just install the ASIX drivers rather than the ones the manufacturer supplies and they work fine on their own.The USB NIC comes in handy on tablets at work that have no Ethernet that need software installed.R042-EXT-C5E is the model I have.
About nut drivers - Page 1
Forum section: electronics / general

author: Back2Volts
author_rank: Unknown
timestamp: January 23, 2017, 05:34:49 pm
content: I am looking for a couple of WIHA nut drivers for M2.5 and M3 screw nuts. I know wrenches (spanners ?) are specified for the flat-to-flat dimension. My question is if the nut drivers are the same or use the screw size. In other words, for- M2.5 should I get a 2.5mm or a 5mm ?- M3 should I get a 3mm or a 5.5mm ?

author: Andy Watson
author_rank: Super Contributor
timestamp: January 23, 2017, 05:41:10 pm
content: Across the flats, as you would for sockets and box-spanners.

author: Benta
author_rank: Super Contributor
timestamp: January 23, 2017, 07:37:18 pm
content: For metric tools, you'll never find the thread as a parameter. Hex-nuts/bolts, socket-head etc., it's always the flat-to-flat dimension.

author: vk6zgo
author_rank: Super Contributor
timestamp: January 24, 2017, 12:13:04 am
content: Quote from: Benta on January 23, 2017, 07:37:18 pmPretty much the same with UNF/SAE----main places I've seen the thread size for hex stuff is with Whitworth & BSF.As an aside,I needed a hollow shafted nutdriver for the nuts on pots.RS Components listed these as "Imperial Nutspinners".I can't help but imagine that spoken in Darth Vader's voice !

author: Unknown
author_rank: Unknown
timestamp: January 24, 2017, 12:31:03 am
content: Quote from: vk6zgo on January 24, 2017, 12:13:04 amNobody seems to have these anymore. I've been keeping an eye out for some to replace the various tube spanners I've collected over the years.Quote from: vk6zgo on January 24, 2017, 12:13:04 amOr Obi-wan:Let's just say we'd like to avoid any "Imperial nutspinners".

author: Back2Volts
author_rank: Unknown
timestamp: January 24, 2017, 12:43:26 am
content: Quote from: vk6zgo on January 24, 2017, 12:13:04 am"Imperial Nutspinners"... may be more like from Space balls

author: Back2Volts
author_rank: Unknown
timestamp: January 24, 2017, 01:01:55 am
content: Thank you guys, across flats it is !

author: Brumby
author_rank: Unknown
timestamp: January 24, 2017, 01:57:37 am
content: "Imperial Nutspinners"That has to go into the EEVblog lexicon.

author: Monkeh
author_rank: Super Contributor
timestamp: January 24, 2017, 02:29:06 am
content: Quote from: vk6zgo on January 24, 2017, 12:13:04 amIt's called a deep socket.

author: Cerebus
author_rank: Super Contributor
timestamp: January 24, 2017, 03:07:59 am
content: Quote from: Monkeh on January 24, 2017, 02:29:06 amBack in the days when British policemen had proper uniforms and felt it was somewhat gauche to openly carry around a two foot six long pole that's obviously designed for bashing heads in and little else, there was the problem of how to discretely carry a truncheon. Thus was born the policeman's trouser with its 'deep groin pocket' and the attendant jokes in the station canteen. For some reason, all this talk of 'imperial nut spinners' and 'deep sockets' made me think of it.
The USA's newest weather satellite sends first photos - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 24, 2017, 12:48:10 am
content: 4X The resolution of previous satellites.GOES 16https://en.wikipedia.org/wiki/GOES-16http://www.usatoday.com/story/weather/2017/01/23/hi-def-heavens-new-weather-satellite-sends-first-photos/96953710/

author: Tomorokoshi
author_rank: Super Contributor
timestamp: January 24, 2017, 02:55:24 am
content: That top picture is awesome. Like the cover of a good '60's SF book. Or a scene from a '70's SF movie franchise.
iPhone 7 headphone jack hack. - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: January 24, 2017, 01:08:50 am
content: For iPhone 7 users who want a headphone jack without the adapter:https://youtu.be/5tqH-Un9SFUGood Luck.

author: Richard Crowley
author_rank: Super Contributor
timestamp: January 24, 2017, 01:26:20 am
content: Quote
TIPs for Hardware Design (every day one tip / video) - Page 1
Forum section: electronics / general

author: robertferanec
author_rank: Regular Contributor
timestamp: January 23, 2017, 10:20:28 pm
content: Hi guys,I started making hardware design tip videos:TIP #001: You can have crosstalk even on a board running at a low frequencyTIP #002: Always spread signals if you have spaceTIP #003: Use “+” sign as a prefix of all your power net namesTIP #004: Add a page reference next to the portsTIP #005: Make small test circuit boardsTIP #006: Always create specific schematic symbol for every component typeTIP #007: Set the right height of your tableTIP #008: You may want to use multiple VIAs in high current tracksTIP #009: Choose two or three biggest component suppliers …TIP #010: Once you name a net, always copy and paste its name. Never re-write it manually.TIP #011: Don’t forget to place mounting holes on your boardTIP #012: Put useful notes / screenshots / tables into schematicTIP #013: Be aware if a connector should be placed directly on the edge …TIP #014: If you have an exposed pad on your component, consider …TIP #015: Create a TODO file to list the changes for the next board versionTIP #016: Using series termination resistors may help to lower possible crosstalkTIP #017: For complex boards, always build minimum 3, but rather 5 prototypesTIP #018: Always create a BOX around the ribbon cable headers... and it continues every dayI hope you will find them usefulLet me know what do you think.- Robert
Found my first multimeter... Radio Shack Micronta 22-211A - Page 1
Forum section: electronics / general

author: jimdeane
author_rank: Regular Contributor
timestamp: January 22, 2017, 05:25:08 am
content: While rummaging through boxes to try and clear space, I found a cache of my old electronics things. Among them, my original multimeter, a Micronta 22-211A. I probably purchased it 1986-1988.I had to set my power supply to 10.07 volts to get the Extech to read 10.00VDC, but the Micronta agrees with several progressivley cheaper multimeters, so...who knows.

author: Ampera
author_rank: Super Contributor
timestamp: January 22, 2017, 05:27:22 am
content: My grandfather has something like that.The irony is that he purchased it new about a year ago.Cool find either way! My DMM collection is a bit poo (I have one with a broken segment on the display.)

author: EEVblog
author_rank: Unknown
timestamp: January 22, 2017, 06:32:23 am
content: I lusted after that folding model when I was a kid!

author: strangersound
author_rank: Regular Contributor
timestamp: January 22, 2017, 12:02:05 pm
content: That's the one I have. I still use it.

author: jancumps
author_rank: Unknown
timestamp: January 22, 2017, 08:22:47 pm
content: I have a 22-203. Bought when I started electronic studies in (I think) 1982.Appreciate the original test leads and the 100mV error on the 3V range.

author: jimdeane
author_rank: Regular Contributor
timestamp: January 23, 2017, 05:16:26 am
content: Nice. I'm hoping to run across the original leads somewhere. They were not in that box...but I'm sure I didn't throw them away.This one's going back into the rotation. It works, and sometimes it's nice to see a needle and a scale instead of a digital readout.

author: SingedFingers
author_rank: Frequent Contributor
timestamp: January 23, 2017, 07:19:42 am
content: Got a Micronta 22-214A here in active service. Good meters. Very sensitive. 50k/volt. Had this since about 1987 I think.Needs a service as the movement is a bit floppy and it's difficult to get an accurate FSD at different orientations.

author: JoeN
author_rank: Frequent Contributor
timestamp: January 23, 2017, 10:36:55 am
content: Got one of those myself. Cannot for the life of me remember when I got it. 88-90? I taught myself to program at the local Radio Shack on a TRS-80 Model 3.
The Torpedoes of WWII Documentary  - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 23, 2017, 02:05:30 am
content: A little OT but interesting to watch. Get about 10 or 15 minutes in and gets interesting.The problems with arming, guidance and propulsion and how it was solved. Then the switch from steam to electric propulsion.

author: Fraser
author_rank: Super Contributor
timestamp: January 23, 2017, 02:43:55 am
content: I love submarines and torpedo technology. Thanks for the link 👍🙂

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: January 23, 2017, 04:15:12 am
content: Nice, enjoyable. Among all of the Mark 14's problems they didn't mention circular runs, that's when the torps guidance locks hard over and the torpedo comes back at the sub that fired it! The USN Tulibee was making a surface attack on a freighter when it sunk itself - talk about epic own goal! Single survivor was blown off the bridge and fished out of the water by the Japanese.From what I read the Mark 24 air dropped acoustic homed in on the 24 kHzwhine of the Uboat's electric motoractive homing?not the prop noise. They were deadly effective.No mention as well of the JapaneseLong Lancetorpedo which was a technological improvement over the comparable US equivalent.
Where to buy Kinston / Riston / generic presensitised positive acting PCB - Page 1
Forum section: electronics / general

author: DTJ
author_rank: Super Contributor
timestamp: January 23, 2017, 05:21:57 am
content: Has anyone got a good low cost source of Kinsten, Riston or equivalent PCB material?It seems a bit pricey on ebay and Aliexpress. I thought there might be some generic stuff cheap but I can't find any.The local Kinsten guy has it at an ok price but the shipping kills it.Edit - I'd love to find a source of the paper phenolic in double sided.
Freeware programs for creating network diagrams - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: January 22, 2017, 03:55:20 am
content: Can anyone recommend any programs that are ideally freeware which I can use to create network diagrams to depict links, IP addresses etc...?I know I can probably do it with Microsoft Office tools but clipart gives me the heebie-jeebies and there are better tools for the job out there.

author: Skimask
author_rank: Super Contributor
timestamp: January 22, 2017, 03:56:17 am
content: DaveCAD

author: XOIIO
author_rank: Super Contributor
timestamp: January 22, 2017, 03:58:59 am
content: I use gliffy and love it, it does have some quirks but they are minor and you end up with gorgeous looking diagrams.Here's an older personal network and one for the business I do work at sometimes, which I made after redoing most of the network.

author: Halcyon
author_rank: Unknown
timestamp: January 22, 2017, 03:59:15 am
content: Quote from: Skimask on January 22, 2017, 03:56:17 amI'm not as good as Dave when it comes to drawing. :-)Quote from: XOIIO on January 22, 2017, 03:58:59 amThat does look good. Thanks for the recommendation. I'd add that to the list of software to try.

author: edpalmer42
author_rank: Super Contributor
timestamp: January 22, 2017, 04:04:37 am
content: It's been a while since I used it, but Network Notepad did everything I needed.http://www.networknotepad.com/index.shtml

author: ataradov
author_rank: Super Contributor
timestamp: January 22, 2017, 04:08:40 am
content: I've used Dia. Like anything open source, it is quirky, but does the job.

author: XOIIO
author_rank: Super Contributor
timestamp: January 22, 2017, 04:09:55 am
content: Quote from: Halcyon on January 22, 2017, 03:59:15 amYeah, it's got a limit on number of public diagrams and no exporting with the free account, but screenshots work fine lol. Has more icons and stuff for the paid account iirc.
Galileo satellite  clock failures - one for the time nuts - Page 1
Forum section: electronics / general

author: 1980s_john
author_rank: Contributor
timestamp: January 18, 2017, 05:35:22 pm
content: BBC news story regarding failure of 9 clocks out of 18 Galileo satellites:http://www.bbc.co.uk/news/science-environment-38664225A bit tricky to get them back to the benchRegards,John

author: Towger
author_rank: Super Contributor
timestamp: January 20, 2017, 04:04:18 pm
content: I wonder if they used the same suppliers as our fellow forum members who sourced their rubidium clocks on eBay from China

author: Vtile
author_rank: Super Contributor
timestamp: January 20, 2017, 04:15:58 pm
content: Rohs comliance issue of Yorope? I mean the tin whiskers and all that self coused exotic stuff."Traditionally, lead was added to slow down whisker growth in tin-based solders."

author: Vgkid
author_rank: Super Contributor
timestamp: January 20, 2017, 05:53:50 pm
content: Quote from: Vtile on January 20, 2017, 04:15:58 pmI have read somewhere that anything safety qualified(especially Aerospace) is exempt from ROHS.

author: Monkeh
author_rank: Super Contributor
timestamp: January 20, 2017, 05:56:54 pm
content: Hazardous substances aren't really a concern for something which goes up and stays up.

author: SeanB
author_rank: Super Contributor
timestamp: January 21, 2017, 08:34:18 pm
content: Quote from: Monkeh on January 20, 2017, 05:56:54 pmThey do come down, but mostly as lots of very small well cooked pieces, and with 78% of the planet being water, there is little chance of them landing on land, and even less of them landing on habitable land. Of course most of the time they are controlled deorbits over the Pacific, but those that have sudden failures in either attitude control, power control or housekeeping tend to be those that do the dice roll of where they will impact.
Scanning 8mm movies - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: January 21, 2017, 04:23:44 pm
content: I have built an 8mm movie scanner, at present I am using a digital Ricoh camera but the recording time at high resolution is less than the reel time, this is irrespective of SD card size appears to be due to the cameras buffer. What I would like is a camera which can record straight to a computer. I was wondering if any one knows of such a beast It does not need to be full HD as the film quality is such that to high a resolution makes things worse.

author: Tom45
author_rank: Frequent Contributor
timestamp: January 21, 2017, 05:05:08 pm
content: Take a look at the USB cameras fromhttp://www.mightexsystems.com/index.php?cPath=1I've used several different models with good results over the years. They have an application that might be capable of saving continuous frames to disk. I've written code to talk to the cameras directly, so haven't investigated using their app for that purpose.Take a look at their 752x480 S series camera with global shutter. It will do over 30 frames/second and costs $180.
Eagle 5.7.0 (or close) install for Linux Mint - Anyone can send? - Page 1
Forum section: electronics / general

author: Yansi
author_rank: Super Contributor
timestamp: January 21, 2017, 12:34:42 pm
content: Hello!Looking for an Eagle 5.7.0 install package for Linux (Mint). If you have the install or know where to get it, I will really appreciate!Many thanks,Yansi

author: hans
author_rank: Super Contributor
timestamp: January 21, 2017, 12:43:04 pm
content: Maybe try getting the debian packages from launchpad:https://launchpad.net/ubuntu/lucid/i386/eagle/5.7.0-2Not sure if they will work on any recent Ubuntu or Linux Mint installation though, because dependencies.If not, a virtual machine with ubuntu 12.04 LTS or something may work better.

author: Flenser
author_rank: Regular Contributor
timestamp: January 21, 2017, 01:29:37 pm
content: Courtesy of Hackaday.comhttp://hackaday.com/2017/01/19/autodesk-moves-eagle-to-subscription-only-pricing/Quote

author: Yansi
author_rank: Super Contributor
timestamp: January 21, 2017, 02:17:34 pm
content: But there's no 5.7.0. And I guess they've mopped up all older versions, that were bullshit and telemetry free. One can only guess what crap has autodesk added.hans: Thanks for the link. We're unable to install it, but we'll try to figure out.
Extreme teardown: several 18650 cells - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 21, 2017, 03:35:15 am
content: A bit surprising there wasn't even any smoke involved, despite two of the cells apparently failed from bad internal connections and have a fair amount of charge left in them.What would be nice is if someone could give her a bad Tesla cell (and some good ones) so she could tell us just how the Tesla cells are different.
Bad Lip-Reading - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: January 20, 2017, 10:41:58 pm
content: I'm not normally a fan of most stuff on YouTube butthis channelis brilliant. I've been literally laughing out loud. Their videos are very cleverly edited and well put together.Even though I've never actually watched Star Wars, I still find this video hilarious:

author: ModemHead
author_rank: Frequent Contributor
timestamp: January 21, 2017, 12:49:22 am
content: The NFL ones are hilarious as well.
Licence free frequency in Peru  - Page 1
Forum section: electronics / general

author: hamdi.tn
author_rank: Frequent Contributor
timestamp: January 20, 2017, 01:38:04 pm
content: hi everyone,is there anyone here familiar withPerulaws that concern radio transmission is 433mhz is usable there without any formality as it's the case in Europe or no.Thanks

author: twistedxknights
author_rank: Newbie
timestamp: January 20, 2017, 03:59:20 pm
content: simple answer, No , you would need to be a licensed Hamvisithttps://en.wikipedia.org/wiki/LPD433for a more detailed answer and explanation of the different ITU Regions

author: Benta
author_rank: Super Contributor
timestamp: January 20, 2017, 08:16:23 pm
content: Neither 433 nor 868 MHz are open for unlicensed (ISM) use in the Americas.915 MHz should be available for both North- and South America.

author: hamdi.tn
author_rank: Frequent Contributor
timestamp: January 20, 2017, 11:18:08 pm
content: Thank you guys,i found a document from the communication ministry indicating that 915Mhz is the band intended for industrial, scientific and medical. however i can't find any tx power limit.totally hate regulation stuff

author: Benta
author_rank: Super Contributor
timestamp: January 21, 2017, 12:01:39 am
content: I'd start by checking the US FCC for documentation. Odds are that the Peruvian regulations will be similar.Normally, the ISM bands allow 1...10 mW ERP, there might be a few frequencies where 100 mW is OK.I won't go further with this, it's up to you now.Cheers,

author: hamdi.tn
author_rank: Frequent Contributor
timestamp: January 21, 2017, 12:11:46 am
content: yeah got an answer from Peruvian telecommunication ministry 10mW is ok no authorization needed.above that a permit is needed.Thanks again
MTBF, MTTR, and MTTF for electronic equipment - Page 1
Forum section: electronics / general

author: elwali
author_rank: Newbie
timestamp: January 19, 2017, 11:07:54 pm
content: Hi All,Wondering how to measure (or calculate) reliability factors (MTBF, MTTR, and MTTF) for a device? let's say a cellphone or laptop. I'm pretty sure individual components have their reliability factors measured by manufacturers.but a gain how can we be sure that a device will work for 10 or 20 years non stop?! I wonder what NASA guys do

author: rfeecs
author_rank: Frequent Contributor
timestamp: January 19, 2017, 11:35:47 pm
content: Usually for a system a reliability prediction is calculated, using MIL-HDBK-217 or other similar method.For individual components, the manufacturer provides MTTF data. This data is done by accelerated stress testing. For example testing at elevated temperatures until failure.

author: Kjelt
author_rank: Super Contributor
timestamp: January 20, 2017, 01:07:16 pm
content: Products can also be stress tested, this works with statistical models, like how many products should be tested, can be 10,50,100 etc. and then put working in high humidity, high temperature and other stress factor environment. Than every x hours track how many devices have failed and that will result in some benchmark statistic for that product.For instance for ledlamps there is something like this a figure of L90B50 25000 means that after 25000 hours , 50% of the lamps still have 90% of their initial lumens.Now how you define your MTBF is another thing because when do you think your lamp fails? When it breaks or has 0 lumens (can take centuries)? If it has 10% lumens?
PSU Repairs in Frankfurt? - Page 1
Forum section: electronics / general

author: dexters_lab
author_rank: Unknown
timestamp: January 19, 2017, 05:54:45 pm
content: One of my youtube viewers who helped me with my Quantel Paintbox adventures has a Paintbox himself but it seems as though the PSU might have failed in it, he tried turning it on a few weeks ago but all that happened is it started smelling really bad. So magic smoke time i suspect.He's located in the Frankfurt area, is there anyone one here who could take a look at it the power supply for him?If we can make sure the power supply is good then i can help with the actual paintbox side of things.

author: babysitter
author_rank: Frequent Contributor
timestamp: January 19, 2017, 07:22:46 pm
content: There are several repair cafes and hackerspaces around . If he gets to the Schaffenburg Makerspace (In - tadaaaa - Aschaffenburg) I might help him, but at the other locations he will get help, too.

author: dexters_lab
author_rank: Unknown
timestamp: January 20, 2017, 08:13:45 am
content: thank you, i will pass that info on!