hybridfree/eevblog-posts huggingface dataset:
Analog design - Page 1
Forum section: electronics / general

author: EEVaditya
author_rank: Regular Contributor
timestamp: April 24, 2015, 03:29:44 pm
content: Hello,Do you know any document or book where I gain extensive knowledge on Analog Circuit Designing.

author: Blofeld
author_rank: Regular Contributor
timestamp: April 24, 2015, 03:52:28 pm
content: What do you already know? Are you starting from zero, or do you have some (theoretical) knowledge?

author: mathias
author_rank: Regular Contributor
timestamp: April 25, 2015, 06:18:31 am
content: Also, Integrated Circuit Design or PCB Circuit Design?If it's integrated design: Sedra/Smith "Microelectronic Circuits", is a nice one. Combines both CMOS and BJT.

author: smjcuk
author_rank: Frequent Contributor
timestamp: April 25, 2015, 09:15:04 am
content: Quote from: EEVaditya on April 24, 2015, 03:29:44 pmCan thoroughly recommend the following as a starting point:http://www.amazon.com/dp/1118217322/however check the errata on the accompanying web site as there are a number of confusing big mistakes in it.That and the first few chapters of The Art of Electronics.Then move on to something by Jim Williams and/or Bob Pease.However most of the stuff is learned by "doing it" so as not everything is an ideal world of mathematics and small bits of knowledge - it's a rats nest of all sorts of things that you need to get an actual feel for.Also don't trust SPICE. It's a good starting point for a design but be suspicious if the only knowledge you gain about something is using ideal SPICE models. Sure you can build an oscillator in it, but it may not work when you actually build it. Then you need to know the working model i.e. stray capacitance, lead inductance, crosstalk, completely batshit impedances, coupling, Q and stuff that SPICE goes "meh" to.

author: EEVaditya
author_rank: Regular Contributor
timestamp: June 01, 2015, 07:09:00 am
content: Hey, Blofeld I am starting from Zero.So please suggest accordingly.

author: EEVaditya
author_rank: Regular Contributor
timestamp: June 01, 2015, 07:11:17 am
content: Quote from: mathias on April 25, 2015, 06:18:31 amAlso, please suggest for PCB Circuit Design.

author: Lightages
author_rank: Unknown
timestamp: June 01, 2015, 07:37:03 am
content: This is a thread discussing a free book by Leslie Green. I also provide a mirror to download it in the thread.https://www.eevblog.com/forum/chat/leslie-greens-analog-seekrets-re-upload/msg86216/#msg86216

author: Obin
author_rank: Contributor
timestamp: June 01, 2015, 08:56:20 am
content: I always found this book to be good, contains.... everything you need to know to get started actuallyhttp://www.amazon.com/Principles-Electric-Circuits-Conventional-Current/dp/013507309X
Lets play a game! - Page 1
Forum section: electronics / general

author: Flump
author_rank: Frequent Contributor
timestamp: May 30, 2015, 06:14:52 pm
content: Guess the pin header connections...This is a audio amplifier board bought from ebayno connection information on the advert orincluded in the package.https://www.esr.co.uk/manuals/TDA2030AV.pdfhttp://www.ebay.co.uk/itm/291439962486?_trksid=p2057872.m2749.l2649&var=590536621384&ssPageName=STRK%3AMEBIDX%3AITLarge Images 5MB+ eachhttp://www.drop22.com/images/audioamp/1.JPGhttp://www.drop22.com/images/audioamp/2.JPGhttp://www.drop22.com/images/audioamp/3.JPGhttp://www.drop22.com/images/audioamp/4.JPGhttp://www.drop22.com/images/audioamp/5.JPG

author: KJDS
author_rank: Super Contributor
timestamp: May 30, 2015, 06:35:03 pm
content: I last used a TDA2030 in 1983. I can't remember the pinout.

author: miguelvp
author_rank: Super Contributor
timestamp: May 30, 2015, 07:07:06 pm
content: What do I win?What I marked Vs is really +Vs on the DatasheetGND is really -Vs on the Datasheet

author: miguelvp
author_rank: Super Contributor
timestamp: May 30, 2015, 07:10:30 pm
content: Just to be clear:Vi = InputVs = VCC

author: Zero999
author_rank: Super Contributor
timestamp: May 31, 2015, 10:26:17 am
content: Isn't this the sort of question you should be asking the seller?It's too cheap to be any good. The DC blocking capacitor is undersized so will give a lower cut-off of just under 85Hz.There's no way it'll be able to deliver the specified 18W into a 4 Ohm speaker at 12V. 4W is probably a more reasonable figure, any higher and there will be lots of distortion due to clipping. They also say it'll work down to 6V but the TDA2030 isn't even specified to work below 12V, so it probably won't work at 6V.

author: Flump
author_rank: Frequent Contributor
timestamp: May 31, 2015, 04:48:56 pm
content: Quote from: Hero999 on May 31, 2015, 10:26:17 amQuote from: miguelvp on May 30, 2015, 07:07:06 pmSome good Karma

author: miguelvp
author_rank: Super Contributor
timestamp: May 31, 2015, 05:42:08 pm
content: Karma is good but I rater you clean you bench from all that dust
Oh no! I've fallen off the first page - Page 1
Forum section: electronics / general

author: jpb
author_rank: Super Contributor
timestamp: May 31, 2015, 12:10:52 pm
content: I've finally fallen off the first page (of members ordered by posts) - and not even this post will restore my positionI currently am away from home with my work all week and have no time for electronics (or anything other than preparing for a house move) at weekends though I still like to keep an eye on the forum.With luck, once I move the rest of the family will let me have a little electronics lab in a cellar or shed and I can get back into it all again.
Old used solder reused - Page 1
Forum section: electronics / general

author: Deathwish
author_rank: Unknown
timestamp: June 03, 2015, 10:20:07 am
content: Bit OT but i thought it interesting. I have a friend who popped in today and asked me to keep any old solder i got from dismantling boards, when asked why he said he could melt it down and use it for making toy soldiers in molds and fishing weights. Now I know where all the lead weights go to from car wheels round here as well ....

author: Zero999
author_rank: Super Contributor
timestamp: June 03, 2015, 02:25:27 pm
content: Unless it's unleaded solder:As long as the soldiers aren't for children to play with.Aren't fishing weights which contain lead now illegal in the UK?

author: Deathwish
author_rank: Unknown
timestamp: June 03, 2015, 02:39:07 pm
content: I have no idea to be honest about the legality, he does have a nice set of those old soldiers from wellingtons era etc though. Not that its my kind of thing.

author: Ian.M
author_rank: Super Contributor
timestamp: June 03, 2015, 02:43:39 pm
content: I believe they are legal if each individual weight is >1oz.http://www.legislation.gov.uk/uksi/1986/1992/made
Beam theory question - Page 1
Forum section: electronics / general

author: gildasd
author_rank: Frequent Contributor
timestamp: May 29, 2015, 07:46:24 pm
content: Hello,Not electronics, but hey, it's physics, close enoughMy material science professor is Dutch, and while translating his course work, everything became "Bending moment" on a few critical pages...Here are the offending diagrams, I've filled in what I've already determined, but I'm guessing :Image 1:- P= Weight distribution.- Q= Shear moment.- M= Bending moment.Image 2:- Total moment?- V= No idea- M= No ideaThanks for any help!

author: alterbaron
author_rank: Contributor
timestamp: May 29, 2015, 09:31:33 pm
content: Here's what I'd put down:Image 1:P = distributed load (force per unit length)M = Bending moment (http://en.wikipedia.org/wiki/Bending_moment)V = Shear forceImage 2:M0 = Applied moment.V = Shear forceM = Bending moment
Fundamentals Friday on Noise/EMI - Page 1
Forum section: electronics / general

author: eecook
author_rank: Regular Contributor
timestamp: May 29, 2015, 04:21:53 pm
content: I know this is a tall order and a very extensive subject, but I think Noise coupling and EMI would make a great topic for a Fundamentals Friday. In the past I have resolved to Ott's book but it would be fun to see Dave doing a vídeo about it. Questions like:> What is common-mode noise?> What is differential-mode noise?> What is thermal noise?> What other kinds of noise are there?> What are the most typical coupling mechanisms?> How does common-mode to differential-mode conversion work?> What is the difference between earth, chassis and ground?> How do you model noise coupling phenomena using equivalent circuits?> How do you mitigate noise in particular cases? How circuit models help find a solution?> How can board interconects can pickup noise and what are good interconnection practices?Cheers!

author: Yansi
author_rank: Super Contributor
timestamp: May 29, 2015, 05:16:03 pm
content: There was at least one video answering most of your questions. Search for it. Probably the one where Dave got the blue E-field and H-field probes as a gift - and all related videos to that.

author: eecook
author_rank: Regular Contributor
timestamp: May 30, 2015, 03:30:34 pm
content: I saw that video, the one on EMC precompliance and the one on tracking common mode noise. I'll watch them again just to be sure but I don't remember my questions being answered there, specially on the mailbag one.
Youtube subscription collections disappeared. - Page 1
Forum section: electronics / general

author: Kibi
author_rank: Unknown
timestamp: May 27, 2015, 07:19:59 pm
content: I wonder if anyone else has noticed this, but it would seem that they have deleted the subscription collections and now there is just one long list of all of the channels that you subscribe to. What an absolute nuisance."Manage Subscriptions" offers no functionality anymore either.Surely Google haven't stuffed up again!! They keep messing about with things and then breaking really useful things in the process.

author: codeboy2k
author_rank: Super Contributor
timestamp: May 28, 2015, 06:41:06 am
content: Bugger! I just saw that too.https://support.google.com/youtube/answer/6233832?hl=enMy subscription list is useless on youtube now.I found a redditer's suggestion to use feedly, so I did that. It's OK again:http://www.reddit.com/r/youtube/comments/37erd8/rip_youtube_subscription_collections/crm9vfaIt was suggested to export your subscriptions from Youtube and import them into Feedly and then you can make collections again. I just did it, it's a simple drag and drop process on feedly. Very quick, and I think feedly is going to be useful to me for other sites as well now.

author: Mechanical Menace
author_rank: Super Contributor
timestamp: May 28, 2015, 10:46:37 am
content: I'm going to have to check my account settings, this happened months ago for me so I'm guessing I'm still signed up to some betas.

author: dexters_lab
author_rank: Unknown
timestamp: May 28, 2015, 12:43:06 pm
content: i can only hope they are implementing something better, it was pretty clunky the way it was before so i never really used that feature much

author: codeboy2k
author_rank: Super Contributor
timestamp: May 29, 2015, 01:17:07 pm
content: The Feedly collections seem ok so far as an alternative.Probably not going to be a clean integration when you add new subscriptions on YouTube though. It will have to be a double add, if you want to have feedly collections and also maintain YouTube subscriptions so you get decent suggestions.
Avago buys Broadcom - Page 1
Forum section: electronics / general

author: ruffy91
author_rank: Regular Contributor
timestamp: May 28, 2015, 02:32:44 pm
content: http://www.wsj.com/articles/avago-to-buy-broadcom-for-37-billion-1432811311What do you guys think? Will they rename it to Broadsight? Keycom? Broadgo?I never like it when Agilent buys a company.

author: Howardlong
author_rank: Super Contributor
timestamp: May 28, 2015, 02:45:07 pm
content: Quote from: ruffy91 on May 28, 2015, 02:32:44 pmI quite like Bravago. Sounds bold, if not a little cocksure.I doubt it's going to end here. Those M&A suits know when the fire's hot, they're sure to be sharpening their fountain pens, and locking and loading their Powerpoints with shareholder value, ROI and various other mystic crystal ball gazing nomenclature.

author: amyk
author_rank: Super Contributor
timestamp: May 28, 2015, 02:47:07 pm
content: Hopefully they'll be a bit less stingy with releasing datasheets than Broadcom.

author: Marco
author_rank: Super Contributor
timestamp: May 28, 2015, 03:27:38 pm
content: How the hell can Avago afford that?Oh, they have a 76x P/E ratio ... I need to stop looking at stock pricing, it's too scary.
Awesome way to remove parts - Page 1
Forum section: electronics / general

author: electronics-whiz
author_rank: Regular Contributor
timestamp: May 29, 2015, 04:53:01 pm
content: I got an old dremal multimax tool. I decided to try to use it to cut off some junk parts on a board I was gutting. The parts were in the way of what I wanted. Found out it actually works quite well with metal blade. It actually fits under a lot of stuff like caps, etc and leave usable amount of lead on them. I found really nice for coils, large MOSFETs, heatsinks, transformers.
Adam Savage Tested Builds Captain Kirk's Chair Replica - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: May 28, 2015, 02:54:49 am
content: Kind of a garage build in terms of quality but fun to watch.

author: HP-ILnerd
author_rank: Frequent Contributor
timestamp: May 28, 2015, 05:06:51 am
content: That's pretty cool, but they could have saved themselves basically all of the guessing and trouble they had if they had a scope.Savage has an incredible shop (check some of his other videos), but he needs at least one more tool.

author: AndreasF
author_rank: Frequent Contributor
timestamp: May 28, 2015, 06:33:50 am
content: As much as I like most of their other "one-day-build" videos, I found this one slightly disappointing. All the other ones tend to give a bit more background on why he does things a certain way, this one doesn't. All we see is that things are supposedly not working, some vague attempts at troubleshooting and eventually it gets fixed somehow with no mention of what the actual problems were. Different target audience I suppose.
KickStarter Maker Website - Page 1
Forum section: electronics / general

author: Justin_
author_rank: Newbie
timestamp: May 26, 2015, 07:25:53 pm
content: Hey I made a KickStarter For a website designed for Makers by Makers! If you know a maker love a maker hate a maker or like support when building your project Please consider to donate. Every dollar counts! Please Share With all of your friends!https://www.kickstarter.com/projects/395595582/projectpetalcomThe website will be made to combine all aspects of making form file sharing to let your friends help edit your code or pcb or anything to chats groups and a :facebook(R) like wallPlease consider donating and sharing with your friends!If this type of posting is not allowed please let me know thanks!!

author: iampoor
author_rank: Frequent Contributor
timestamp: May 27, 2015, 07:52:09 am
content: Specifics on what you want to do, a breakdown of where the money is going, a clear explanation of the perks for any donors and examples of websites you have created would help.I really have no idea what your trying to accomplish, or why I should support you from the current campaign. I suspect many people will have similar sentiments.

author: Galenbo
author_rank: Super Contributor
timestamp: May 27, 2015, 12:23:56 pm
content: A campaign to get money for making a website?So some website is the "product"How many are you gonna produce? Where's the working prototype?
Straight Sixes - Page 1
Forum section: electronics / general

author: xrunner
author_rank: Super Contributor
timestamp: May 27, 2015, 02:12:33 am
content: It's in the attachment.

author: Mr.B
author_rank: Unknown
timestamp: May 27, 2015, 02:15:28 am
content: Third one down, third one in...

author: miguelvp
author_rank: Super Contributor
timestamp: May 27, 2015, 02:35:09 am
content: Quote from: Mr.B on May 27, 2015, 02:15:28 am1 row 8th columnWhat can I say I'm permanently logged in!

author: xrunner
author_rank: Super Contributor
timestamp: May 27, 2015, 02:41:15 am
content: I thought it would get there today, and I've watched it for the last several hours. To get from 666665 to 666666 took at least 10 minutes and I wanted to catch it without going over.I think I have way too much free time on my hands LOL.

author: miguelvp
author_rank: Super Contributor
timestamp: May 27, 2015, 02:49:14 am
content: And the winner is N2IXK:https://www.eevblog.com/forum/beginners/5v-logic-to-energize-220v-contactor/msg681047/#msg681047Hmm his avatar picture actuall looks the partSome kind of evil vacuum possessed tube
Can't order parts online from Keysight - Page 1
Forum section: electronics / general

author: JoeO
author_rank: Frequent Contributor
timestamp: May 25, 2015, 03:46:54 pm
content: I have struggled with the Keysight online parts ordering website for more than 3 weeks.I am ordering 3 Rotary Encoders. I have a logon and I have registered. When I go to checkout I get the following popup. I click on "checkout" and nothing happens.Can anyone tell me what is going on? TIA.

author: Bud
author_rank: Super Contributor
timestamp: May 25, 2015, 05:23:24 pm
content: Have you tried a different browser ? Or from your cell phone.

author: JoeO
author_rank: Frequent Contributor
timestamp: May 25, 2015, 05:48:02 pm
content: Quote from: Bud on May 25, 2015, 05:23:24 pmThanks for replying.I tried FF and IE. IE seems to go further.I will try on my iPad.Update: Same result on the iPad - No response when selecting checkout.
Connecting mini DisplayPort to HDMI....How? - Page 1
Forum section: electronics / general

author: signal
author_rank: Regular Contributor
timestamp: May 23, 2015, 12:23:05 am
content: This may sound like a basic question, but it has me stumped.I have Raspberry PI's which of course have an HDMI connector. I would like to connect my Apple Cinema Display to these, but the output of the display is a hard wired mini Display Port. I have tried some obvious things:Use a female-to-female mini display port coupler, connect to the RPI using a HDMI to mini Display Port cableUse a mini Display Port to DisplayPort coupler and connect to the RPI using a HDMI to Display Port cableNeither of these work, I get no signal. In fact when reading reviews for many of these coupler type devices I see the same thing, people not having success.Does anyone know how I can connect a mini DisplayPort male plug easily to a HDMI port on the RPI? I am trying to avoid having to have a second display on my desk for when I wish to work with the RPI.Brian

author: Richard Crowley
author_rank: Super Contributor
timestamp: May 23, 2015, 01:02:05 am
content: Although they use the same kind of TMDS channels (4 in DP, and 3 in HDMI), DisplayPort is different than HDMI.Many (most?) DisplayPort outputs can be re-configured to output HDMI-like signals so you can use a simple DisplayPort to HDMI cable or adapter.But, alas, there is no way to do the reverse. If you have a simple HDMI output (as on the RasPi), there is no way to convert it to DisplayPort with a simple adapter.

author: signal
author_rank: Regular Contributor
timestamp: May 23, 2015, 01:04:18 am
content: Richard,Thanks, that is very helpful information that could have saved me some $$$ in numerous cables and connectors.I wonder if some item exists that will allow for this. I am going to search, but my guess is its probably too expensive. Maybe I just buy one of those very small HDMI TFT displays and call it a day for when I need to plug in the RPI's.Brian

author: Richard Crowley
author_rank: Super Contributor
timestamp: May 23, 2015, 01:12:47 am
content: It appears that there are active HDMI to DP converter boxes that people have successfully used with that screen.Kanex XD HDMI to Mini Displayport Converterhttp://www.amazon.com/Kanex-HDMI-Mini-Displayport-Converter/dp/B003LGOWNQ

author: signal
author_rank: Regular Contributor
timestamp: May 23, 2015, 01:24:02 am
content: Thanks for pointing me to that!

author: German_EE
author_rank: Super Contributor
timestamp: May 24, 2015, 10:18:41 am
content: http://www.startech.com/AV/Converters/Video/Active-HDMI-or-DVI-to-DisplayPort-Converter~HDMI2DPhttp://www.cablestogo.com/product/54179http://www.lindy-usa.com/HDMI-to-DisplayPort-4K-Adapter-38146.html

author: signal
author_rank: Regular Contributor
timestamp: May 24, 2015, 09:22:39 pm
content: Thank you all for the links.
Apple watch tear down with SEM image on every chip - Page 1
Forum section: electronics / general

author: Hypernova
author_rank: Unknown
timestamp: May 23, 2015, 02:37:34 am
content: http://www.sitrigroup.com/About/NewsDetailed/38They've gone chip-on-board for everything except the sensors and encapsulated the whole board. SITRI claims the is the first time they've seen a system-in-package.Shielding is done with a 10um coating on the encapsulation.Check out the SEM image of the MEMS microphone!

author: Muxr
author_rank: Super Contributor
timestamp: May 23, 2015, 04:16:29 am
content: Pretty nice photos. That microphone is pretty fancy.
What are my electronics worth? - Page 1
Forum section: electronics / general

author: vuckho
author_rank: Newbie
timestamp: May 22, 2015, 05:03:07 pm
content: Hi to everyone,more of a question, than enything else.And I hope you dont mind me putting it here, it seemed like the most apropriate place.Here we go:some time ago, I got a box of relays and as I will never use up 50 bloody relays, a thought came to mind to sell them. But here lies the problem I have no idea how much they are worth and if it is even worth selling them.the relays in questions are Matsushita NR-SL2D-24Vany advice or answer will be greatly appreciated.

author: Muxr
author_rank: Super Contributor
timestamp: May 22, 2015, 05:15:08 pm
content: You should list your country because the answer depends on the country. Usually if you live in a big market you can command a higher price due to faster shipping.Here are some closed listings on Ebay for Matsushita relays. There aren't the ones with your model, but you can probably devise a price based on similar ones:http://www.ebay.com/sch/i.html?_odkw=Matsushita+NR-SL2D-24V&LH_Complete=1&LH_Sold=1&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.XMatsushita+relay+24v.TRS0&_nkw=Matsushita+relay+24v&_sacat=0

author: vuckho
author_rank: Newbie
timestamp: May 22, 2015, 05:23:13 pm
content: Thank you for the link.I'm from Slovenia, so I would only sell to continental europe...from what I see on ebay, it would be like 2-3€ per relay... correct me if I'm wrongbtw, i have little to no knowledge of electrical engineering..

author: Muxr
author_rank: Super Contributor
timestamp: May 22, 2015, 05:48:09 pm
content: Yeah, I am not familiar with the specific relays you have or what the demand/supply might be, but 2-3euro a piece sounds reasonable.edit: I should also add, since you live in Slovenia (central europe) you can ask slightly more than equivalent chinese listings due to faster shipping.
How it's made,Oil Pressure Sensors: video, includes screenprinted PCB tracks - Page 1
Forum section: electronics / general

author: codeboy2k
author_rank: Super Contributor
timestamp: May 19, 2015, 08:49:56 am
content: I just came across this video and I thought I would share itIt's about the construction of oil-pressure sensors, which to my surprise, reads the pressure directly on the silicon chip. There's a portion where they screen print a silver-palladium alloy onto a ceramic carrier, and then pick and place some passives on the pads. I thought that was pretty cool to see the screen-printing and it was a very quick way to get dozens of little circuits printed. Why isn't that a home-process yetI'd certainly pick screen printing over chemical etching, but it's probably still too expensive even with the reduction in steps.

author: Tandy
author_rank: Frequent Contributor
timestamp: May 19, 2015, 09:32:24 am
content: What is this soddering they speak of?

author: rs20
author_rank: Super Contributor
timestamp: May 19, 2015, 09:49:42 am
content: Thanks for sharing, that's a really elegant process -- I especially liked the way the o-rings and pushed down, and then the whole thing is crimped in that state to maintain the preload. Lovely stuff.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: May 19, 2015, 10:46:48 am
content: It's called hybrid construction. You can do PCB stuff and IC packaging stuff, all in one place.I'd suspect the screened connections are lower tolerance than photo-etched (compare the tolerance on PCB silkscreen to soldermask or copper). But certainly good enough for placing some chip components on.Other methods include direct nichrome (or other resistive alloy) deposition, followed by photochemical or laser etching, to get precise shapes and controlled resistances. Laser drilling to apply vias on the ceramic substrate; alternating layers of enamel and metal paste to get multilayer construction; etc.No idea what the typical NRE is, but I'm sure it's not small. When you're making a billion of a thing, like automakers do, you can negotiate astonishingly low prices even for things like this.Tim

author: codeboy2k
author_rank: Super Contributor
timestamp: May 19, 2015, 08:45:10 pm
content: Yeah, I've seen some of the multilayer hybrids used in some HP gear, and others as well.This oil pressure sensor is not a complex hybrid, but I've never seen the construction in a video before. I'm sure there's one out there somewhere showing the process for a more complex hybrid as you described.Post a link if anyone has oneCheers
Workspace sharing, Norway Oslo - Page 1
Forum section: electronics / general

author: hcglitte
author_rank: Regular Contributor
timestamp: May 19, 2015, 04:33:42 pm
content: Hi,I am looking for someone to share a work space with in Oslo. I am an electronics designer and have my own products which I sell.If you are interested (or know of any) please respond to this thread.Best Regards,Hans Chr.
Raytheon CK-722 interesting reading - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: May 19, 2015, 01:27:19 pm
content: There was a post recently that mentioned the Raytheon CK-722 and the fact it was the first low cost transistor available for general sale.That got me interested since I had never read any thing on that before.Here are some links with some good info.Some things I did not know............The 722 and 721 were actually 718's that did not meet spec. They were rebranded and sold at a lesser cost. What is interesting is Raytheon was apparently one of, if not the first to do this (1953).Original cost was $7.60 but fell to $.99 by 1956.Raytheon actively supported and encouraged the amateur market.The designer was Norman Krim who graduated MIT and started working for Raytheon in 1933 for $.50 / hour. He worked for the company until 1997. He also was the CEO of Radio Shack from 1961-1963.LinksRaytheon CK-722 Wikipedia.http://en.wikipedia.org/wiki/CK722Norman Krim Wikipedia.http://en.wikipedia.org/wiki/Norman_KrimThe CK722 Museum.http://www.ck722museum.com/The Semiconductor Museum.http://semiconductormuseum.com/Museum_Index.htmLots of good reading. A lot of interesting other links on these sites too.

author: TimFox
author_rank: Super Contributor
timestamp: May 19, 2015, 01:33:00 pm
content: When I was a Cub Scout, the only two transistors available to kids were the Raytheon CK722 and the GE 2N107. I built a code-practice oscillator with the CK722.

author: Homer J Simpson
author_rank: Super Contributor
timestamp: May 19, 2015, 01:43:22 pm
content: From Wikipedia."Carl David Todd --Participant in the CK722 Design ContestCarl Todd a hobbyist and later engineer at GE Transistor division placed 6th in Raytheon's CK722 design contest. He won $100. The CK722 was partly responsible for his interest in becoming an engineer. His interest as a hobbyist and engineer would permit him to conceive the 2N107 transistor, GE's alternative to the CK722."
Please, stop using the word "Technology" like that - Page 1
Forum section: electronics / general

author: fubar.gr
author_rank: Unknown
timestamp: May 18, 2015, 12:52:37 pm
content: I don't know if this is a relatively new fad or I just now became aware of it, but the trend seems to be growing and it is starting to irk me to no end.So there are several self-proclaimed "technology" websites, blogs or Youtube channels. However 99% of them are exclusively doing tablet and smartphone reviews and pretty much nothing else.Sorry guys, but this isn't technology, that's consumer electronics. There's no educational value and nothing technological about comparing weights, dimensions or camera Megapixels from different smartphones.I really wish this dumbing down of the word "Technology" would stop.

author: Mechanical Menace
author_rank: Super Contributor
timestamp: May 18, 2015, 02:31:07 pm
content: They are examples ofatechnology, those sites and channels may not cover as broad an area as you'd like but they do cover some "machinery and devices developed from scientific knowledge..."

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 18, 2015, 08:42:13 pm
content: Quote from: wilfred on May 18, 2015, 01:02:44 pm+1 thats why few good books thats translated from ancient languages now have very misconcepting meaning. to know its original content is to go back and intimate to the original language that they were written in... hmm.

author: PeterFW
author_rank: Frequent Contributor
timestamp: May 18, 2015, 08:58:07 pm
content: Quote from: wilfred on May 18, 2015, 01:02:44 pmEvery language does that, at least every commonly spoken language.There are so many words that get butchered today... why make a fuss about "technology", not worth the hassle.

author: Unknown
author_rank: Unknown
timestamp: May 19, 2015, 12:04:17 am
content: Quote from: Mechatrommer on May 18, 2015, 08:42:13 pmNot just ancient languages; there's many relatively recent examples of phrases & terminology in Modern English. My favourite is this sentence from Shackleton's "The Heart of the Antarctic" from 1909:QuotePeople today tend to read that as a euphemism for masturbation, sex, or homosexuality. In reality, it's an 18th/19th/early 20th century term that basically means closing the door to your office so you can work uninterrupted...

author: SL4P
author_rank: Super Contributor
timestamp: May 19, 2015, 12:13:53 am
content: I rather like this forum that exploits online digital blogging technology to discuss electronics engineering and the disciplines associated with it - as well as the consequences and applications in professional and consumer technology!
High end solder pencil or low end temp controlled iron - Page 1
Forum section: electronics / general

author: tron9000
author_rank: Frequent Contributor
timestamp: May 18, 2015, 09:26:06 pm
content: Got ask a difficult question a while back: he wanted to solder some wires together at home, but couldn't afford a decent soldering iron with temp control and ask if an antex mains powered soldering iron was ok for the job? I have used antex ones before, they're not that bad I find.Got me thinking, if you were starting again out on a budget? which would you go for?Also, which side of the sponge do you use? orange side or yellow soft side - or is it a case of there is only one side you should use?
Electronics Reference Posters? - Page 1
Forum section: electronics / general

author: inteljoe
author_rank: Contributor
timestamp: May 17, 2015, 02:43:42 am
content: I apologize if this has been posted before, perhaps my search skills are weak...When I was a kid, I remember my dad has these EE reference posters on the walls with his electronics. I don't remember who made them, but one had Ohm's Law and some other tables I think and another has the resistor color codes, etc...Problem is, I can't find these posters and I can't seem to find anyone online who makes anything close.The closest I've found was a Kickstarter in 2012 and it does not seem those posters are for sale anymore. I also found these;http://www.freetronics.com.au/collections/wall-chartsbut they don't seem to be made anymore and it's instead something you just print on an 8" x 10" piece of paper at home.Sure... It works, but I'm looking for something bigger, with more information and obviously better quality than my home printer.Can anyone help? Does such a beast still exist? I would like to have one above my electronics work table.Thanks!
Scope model ID  - Page 1
Forum section: electronics / general

author: Deathwish
author_rank: Unknown
timestamp: May 18, 2015, 02:14:25 am
content: I know its blurry and could be any model, but I found this today and want it at the price it is on offer for as its all I can afford, but can anyone ID it for me please.

author: xrunner
author_rank: Super Contributor
timestamp: May 18, 2015, 02:18:02 am
content: Tektronix 2214

author: lowimpedance
author_rank: Super Contributor
timestamp: May 18, 2015, 03:32:53 am
content: More like a 2211.2214 has a different front.

author: lowimpedance
author_rank: Super Contributor
timestamp: May 18, 2015, 03:43:18 am
content: Having compared to some online photos its an 2211. Have a look yourself and compare the two pics. side by side.

author: G7PSK
author_rank: Super Contributor
timestamp: May 18, 2015, 07:33:56 am
content: On my screen I can clearly see that it reads Tektronix 2211
Fluke Connect Software is Garbage - Page 1
Forum section: electronics / general

author: Terabyte2007
author_rank: Frequent Contributor
timestamp: May 17, 2015, 02:00:09 pm
content: Someone, please tell me how such a great test equipment company like Fluke can produce sub-standard software. I own quite a bit of Fluke test gear and had some hopes that the Fluke Connect software would evolve into something useable one day, but that does not seem to be the case. The software locks up, crashes, has limited features and it just completely amateur compared to other companies such as Keysight and etc. I would expect better from Fluke! I have been using the software pretty much since it came out and it's no better now than it was over a year ago. Issues on multiple machines and OS's.

author: saturation
author_rank: Super Contributor
timestamp: May 17, 2015, 02:33:03 pm
content: I feel your pain. I opted for the Agilent/Keysight path primarily as it has wider usage and good reviews beyond say, Play Google.

author: Noise Floor
author_rank: Regular Contributor
timestamp: May 18, 2015, 02:09:34 am
content: I've not used it, besides the crashes what features is it lacking that you want?
Non stocked Digikey parts - Page 1
Forum section: electronics / general

author: blueskull
author_rank: Unknown
timestamp: May 16, 2015, 10:51:37 pm
content: Hi, all,What is this status? It says it is has both immediately shippable stock and factory stock, but why it also stats that it is not in stock? Many Digikey parts have this kind of stock information.Can I purchase these parts? The help message doesn't explain this clearly, at least to me.Thanks,Bo

author: Len
author_rank: Frequent Contributor
timestamp: May 16, 2015, 11:00:08 pm
content: I'm not seeing that, I think it's just a glitch. They had a similar problem a couple of weeks ago -https://www.eevblog.com/forum/chat/digikey-gone-mad/

author: miguelvp
author_rank: Super Contributor
timestamp: May 16, 2015, 11:18:12 pm
content: According to findchips Rochester Electronics has Reel & Tape in single quantities for way less and they have 78,000 in stock.$0.28 each for quantities under 25, I did never purchased from them though.http://www.findchips.com/search/sn74auc2g06yzprVerical has the cheapest price but minimum quantity is 3000As for the non-stock it seems it means they are not ready to ship on small quantities but still available. The T&R for that part at Digikey has the non-stock set to 3000 which is the minimum order.

author: rs20
author_rank: Super Contributor
timestamp: May 16, 2015, 11:22:25 pm
content: I just checked and I still see it, having said that I see no conflict here. Maybe it used to be stocked, but they recently decided to make it a non-stock item --so they still have stock from before for immediate dispatch, but when that lot runs out they won't restock the warehouse and it'll become a truly non-stock item. Maybe some muppet at digikey just accidentally ordered a bunch, so they're in the warehouse but they're not committing to making it a stock item long-term.They say they have 2525 available for immediate dispatch, but it's not returnable (or whatever the normal restrictions are for non-stock items). There's just not a conflict here.
Stairway Fail - Page 1
Forum section: electronics / general

author: SirDan
author_rank: Contributor
timestamp: May 15, 2015, 06:20:47 pm
content: While visiting one of our mountain top repeater sites for a spring checkup, I took a picture of someone's com shelter. This always makes me wonder

author: SeanB
author_rank: Super Contributor
timestamp: May 15, 2015, 06:27:05 pm
content: Probably there was originally a section cut out to get a large rack inside. You can see there has been a repair of the section, so this was cut out and replaced and the most likely reason was to get something inside or out that was either too big for the door or the existing kit was in the way.

author: kc9qvl
author_rank: Regular Contributor
timestamp: May 15, 2015, 09:07:32 pm
content: I see the outline of a door at the top of those stairs. Seam on top and threshold. No door handle though. Any other stairs on that shed?

author: SirDan
author_rank: Contributor
timestamp: May 15, 2015, 10:04:09 pm
content: QuoteYes, there is a set of stairs and door on the other side. There will be some logical explanation for sure, but it just looks funny with stairs going into a solid wall.

author: SL4P
author_rank: Super Contributor
timestamp: May 16, 2015, 09:58:32 pm
content: it may be something seasonal like snow buildup etc which made a door on the other side more useful, or someone stuffed up with power and rack plinth in the wrong place - easier to move door & steps.but still... who was the PM?
A new level for audio snake oil? - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: May 16, 2015, 01:38:37 pm
content: I found this yesterday.Take the time to read the "specs".The claimed improvements.Heck one has a case made from African Bubinga.http://www.tripointaudio.us/PRODUCTS.htm

author: xrunner
author_rank: Super Contributor
timestamp: May 16, 2015, 01:47:15 pm
content: Yea I love this audiophool junk. What you are buying and what they are selling is the outside looks. That's why they put so much into the looks of the stuff. See how nice the case looks? It's basically nice looking furniture for sale.

author: amyk
author_rank: Super Contributor
timestamp: May 16, 2015, 03:26:31 pm
content: QuoteQuote...so it's just an otherwise empty box with some wires passing through them.

author: Mechanical Menace
author_rank: Super Contributor
timestamp: May 16, 2015, 03:43:02 pm
content: Quote from: amyk on May 16, 2015, 03:26:31 pmThat was my thoughts. And what on earth is the phobia about plastic about?

author: xrunner
author_rank: Super Contributor
timestamp: May 16, 2015, 03:51:24 pm
content: It appears they arereallyproud that it "Improves three dimensionality"Quote

author: saturation
author_rank: Super Contributor
timestamp: May 16, 2015, 04:29:02 pm
content: Production facilities and business descriptors:http://www.manta.com/c/mby8gh4/tripoint-audio-llchttp://www.buzzfile.com/business/Tripoint-Audio-LLC-786-897-2975

author: CatalinaWOW
author_rank: Super Contributor
timestamp: May 16, 2015, 04:43:22 pm
content: The business stats are interesting. Two employees and 120K sales. These guys aren't getting rich. Selling somewhere between 10 and 100 units per year (they don't advertise prices, but it is audiophoolery so it is costly). A nice hobby.The other interesting thing is how many two and three man audio shops are in the area. Clearly a phool rich environment.

author: Artlav
author_rank: Frequent Contributor
timestamp: May 16, 2015, 07:34:50 pm
content: A new level? Nah, same old stuff. Now, if they sold genetic treatment pills that would improve your ears to be clearly able to hear the quality of audiophile grade hardware...

author: Kibi
author_rank: Unknown
timestamp: May 16, 2015, 09:01:26 pm
content: Don't forget the Signature. You must always ensure that you are buying the Signature series otherwise how can you ensure that it's credible.Troy has apparently signed this one, so you know you will be getting what you pay for.I bet if, tomorrow morning, I signed one of my turds I could sell it on to one of these audiophools.
PCB transfer using new cheap transparency. - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: May 01, 2015, 08:35:29 pm
content: Big Clive has a new video, this about PCB manufacture at home, and a possible cheap transparency with better results with inkjet artwork.

author: orion242
author_rank: Unknown
timestamp: May 16, 2015, 05:31:37 am
content: Like his videos. Was going through his old videos and came across this one.Too funny!! Move over superman.
opinions please.  - Page 1
Forum section: electronics / general

author: Deathwish
author_rank: Unknown
timestamp: May 18, 2015, 12:55:18 pm
content: http://www.ebay.co.uk/itm/ELC-Function-Pulse-SIGNAL-GENERATOR-upto-5MHZ-Frequency-counter-50Mhz-/331533302004?pt=LH_DefaultDomain_3&hash=item4d30ecb8f4I just want a basic decent sig gen nothing too flash , nothing expensive. So ....

author: Lightages
author_rank: Unknown
timestamp: May 18, 2015, 06:55:18 pm
content: That is the first time I have seen that one. I assume you speak French?I have seen reports of people using these and being relatively happy:http://www.ebay.com/itm/5MHz-Dual-Channel-DDS-Function-Signal-Generator-Sine-Square-Wave-Sweep-Counter-/171382539398?pt=LH_DefaultDomain_0&hash=item27e7320486http://www.ebay.com/itm/New-2MHz-DDS-Function-Signal-Generator-Module-Meter-UDB1102-/281437200938?pt=LH_DefaultDomain_0&hash=item4186f6e22aAnd there is this one that I looked at but I know nothing about it except it is only a good range for really basic work and mabe audio:http://www.ebay.com/itm/1HZ-500KHz-DDS-Function-Signal-Generator-Module-Sine-Triangle-Square-Wave-case-/200973690447?pt=LH_DefaultDomain_0&hash=item2ecaf7264fI have a Siglent SDG1025 and am very happy with it but it is much more expensive than your range I think.

author: Deathwish
author_rank: Unknown
timestamp: May 18, 2015, 07:04:47 pm
content: No I dont speak French, but I do know where the manual is in english and a dymo labeller helps i guess.
Sony snake oil? - Page 1
Forum section: electronics / general

author: blueskull
author_rank: Unknown
timestamp: May 15, 2015, 04:21:23 am
content: I recently found a document explaining how S-MASTER works. The document really did its job elucidating how the amazing audio technology works. However, I found some snake oils in it.It says the internal jitter was 40fs for the previous generation, and 80as for the new ones. How could that be? A logic gate introduces much jitter than that. It turns out the "jitter" was calculated from audio bits (kidding me?). FAIL.Also, it states its chip can achieve a 228dB SNR internally, so I want to know how can they make 228dB from a 162dB input dynamic range?Sony is definitely not the Sony it used to be.

author: PeterFW
author_rank: Frequent Contributor
timestamp: May 15, 2015, 08:29:09 am
content: Quote from: blueskull on May 15, 2015, 04:21:23 amWell... you need something like that if you want to take full advantage of audiophile sd cards of course!

author: German_EE
author_rank: Super Contributor
timestamp: May 15, 2015, 11:29:35 am
content: "internal jitter was 40fs for the previous generation, and 80as for the new ones"If a digital circuit is good then you will be measuring jitter in the nanosecond range (10-9), if it's REALLY good then you will be seeing jitter measured in picoseconds (10-12).One Femtosecond is 10-15seconds, a beam of light will travel 3 millionths of a meter in this time, about the diameter of a virus.One attosecond is 10-18seconds, a beam of light will travel across three hydrogen atoms during this period.Yep, snake oil
So I don't really have a lot of test equipment. Wanted to test amp usage of USB - Page 1
Forum section: electronics / general

author: masshuu
author_rank: Contributor
timestamp: May 15, 2015, 05:39:00 am
content: So this thing died on me and I'm not sure why. First thing I checked was the 5v hitting it. Second thought was to check if it was drawing too much current or not enough. I have a USB cable that breaks out the pins that I can plug into a breadboard but I just moved and I have no idea where that went. So I rigged this.Needle moved about a thou at the 500 microamps. It was very slight but it was very clearly moving when powered on. Any idea the current that is? Or perhaps just current its self flowing through the cheap meter because the current settings not isolated.Not looking for any real advise, posting since I found the setup amusing. Might accept some pointers though. I assume its dead but not sure how to test it any more. My cheap meter's points are so fat if I try to test any other points they will probably short out to neighboring points. I did try freezing parts of the board except all I have is a can of butane for refilling lighters and other stuff. It worked for freezing but didn't get it to turn on.
Mouser does MarsOne - Page 1
Forum section: electronics / general

author: LabSpokane
author_rank: Super Contributor
timestamp: April 29, 2015, 11:04:08 pm
content: http://video.mouser.com/services/player/bcpid744407138001?bckey=AQ~~,AAAAkAboNaE~,QCbWW31o91dUjbzUeezSy9ApYuKkj6nW&bctid=4150030068001Geez, Mouser. You really made Grant interview this guy?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: April 30, 2015, 01:37:16 am
content: Well, he is a good actor (I assume?).Tim

author: LabSpokane
author_rank: Super Contributor
timestamp: April 30, 2015, 01:47:08 pm
content: Quote from: T3sl4co1l on April 30, 2015, 01:37:16 amI sure hope Grant was acting. I don't think this is what he bargained for in taking the job. It had to be surreal talking to a broke guy who is confident of landing colonists on Mars in 2025.

author: timofonic
author_rank: Frequent Contributor
timestamp: April 30, 2015, 02:15:03 pm
content: I hoped Mouser released the BOM and schematics for MarsOne, but not

author: GK
author_rank: Super Contributor
timestamp: May 01, 2015, 01:11:23 pm
content: And they reckon they can do it for just $6bn.I guess they just need to sell a few more coffee mugs:https://community.mars-one.com/webshopTheir websites FAQ section reads as though it was written by a high school student.

author: GK
author_rank: Super Contributor
timestamp: May 01, 2015, 02:53:38 pm
content: As for estimating the cost of such such an enormously complex project, this is, evidently, about all the detail and insight they can provide:Quotehttp://www.mars-one.com/faq/finance-and-feasibility/how-much-does-the-mission-costI hope that I am not the only one who thinks this looks ludicrously simplistic and unconvincing. I wonder how some of those "discussions" went. "Oh, hello, could I have a rough price on a rocket ship for traveling to Mars and half a dozen self-contained lunar pods please?".

author: LabSpokane
author_rank: Super Contributor
timestamp: May 01, 2015, 04:16:06 pm
content: Quote from: GK on May 01, 2015, 02:53:38 pmBelieve it or not, MarsOne actually contracted Lockheed-Martin for an engineering study for the robotic missions, which are now on hold.http://spacenews.com/mars-one-suspends-work-on-robotic-missions/To see Landsorp still shilling this fantasy with the assistance of Mouser is irritating to say the least.

author: funkyant
author_rank: Unknown
timestamp: May 14, 2015, 10:01:41 pm
content: Quote from: GK on May 01, 2015, 01:11:23 pmThey can't even do that properly. I just escalated my Paypal dispute for this to a claim. They are -$36USD even further away from 6 billion now

author: LabSpokane
author_rank: Super Contributor
timestamp: May 14, 2015, 11:25:17 pm
content: And Bas is *still* headlining Mouser's site.Seriously, Mouser?! Why not Randy Quaid?