hybridfree/eevblog-posts huggingface dataset:
potential divider - Page 1
Forum section: electronics / general

author: ramakrishna
author_rank: Newbie
timestamp: August 08, 2020, 02:49:02 pm
content: potential divider query, the R1(30K) and R2(20K) using in potential divider circuit, input is giving pulse signal from +3V to 0V from R1 one end,from R2 end feeding -5V supply, so what is the output across R2? and give me the formula or equation to calculate these types of two input to potential divider.

author: Ian.M
author_rank: Super Contributor
timestamp: August 08, 2020, 03:14:31 pm
content: It depends how formal a solution you need:For a back of the envelope calculation, as one of your sources is fixed -5V, you can simply take all voltages with respect to that point, (i.e. treat the other source as pulsing from +8V to +5V), and use the usual potential divider formulae to solve it for the two voltage levels of the pulse. If you need the result referred to your original 0V point (rather than across R2), you'd then need to subtract 5V.More formally, you could useSuperpositionandThévenin's theoremHowever if you are a university student, unless you have explicitly been told otherwise, the instructor is probably looking for a solution based on Nodal or Mesh analysis.The numerical results for all methods applied to this circuit *are* equal, so if you solve it by more than one method and yours are different you've made a mistake.

author: SiliconWizard
author_rank: Super Contributor
timestamp: August 08, 2020, 03:22:59 pm
content: A simple, two-resistor divider is pretty easy to analyze and the potential of the middle point can be basically expressed as a barycenter (centroid).That should be more than enough answer here - as Ian.M said, if this is a school assignment, better try and do it by yourself.If the fact the "other end" of the divider is not at 0V (ground) potential - for which you would maybe have the answer - but at some other potential, then it would clearly show you didn't quite grasp this simple circuit, which would show that it'd definitely be an exercise you'd need to work on!
Smoke alarms that don't scream and scare the crap out of you? - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: August 08, 2020, 02:34:51 am
content: Currently, I have three ionisation-type smoke alarms in my home. They are just the normal cheap type that come with most homes. They are mains powered and also battery backed (as required by Australian standards).When the 9v batteries approach 9 volts (always at 0230 in the morning when it's the coldest), they let out a single chirp periodically to let you know the battery is low. But it's not a soft chirp, it's the same type and volume as the full alarm sound, so naturally it scares the shit out of you when it goes off. It's not just the one alarm that goes off either, since they are all interconnected, they all activate.I'm looking to replace them with something a bit more sensible. Even at full alarm, they don't need to be that loud since there are multiple alarms throughout the house. I have looked at the Nest alarms however what I don't like is that they have built-in microphones that form part of the self-test function. Other than that, I do like how they function and provide non-startling audio feedback.Does anyone know of something similar to the Nest alarms but don't pose a cyber security/privacy risk?

author: Tomorokoshi
author_rank: Super Contributor
timestamp: August 08, 2020, 04:15:27 am
content: Here in the United States there are models with a speaker that will say what type of alarm is happening, whether smoke, carbon monoxide, or combustible gas. Not sure about how they operate with low battery. I need to shop and update mine.I think the interconnected ones are too loud. It's disorienting enough, and with all shrieking there's no way to tell where the problem is from.

author: jonovid
author_rank: Super Contributor
timestamp: August 08, 2020, 04:35:44 am
content: Quotea lot more functions can be added by installer / manufacturerhiding in plain sight on your average ceiling, electronic eavesdropping never had it so easy, even get to take pictures.

author: n5al
author_rank: Contributor
timestamp: August 08, 2020, 04:47:01 am
content: I went into a paint store a while back. Their smoke alarm was happily chirping away because of a low battery. About a month later, I returned to the store. The smoke alarm was still chirping. Oh, well.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: August 08, 2020, 04:59:07 am
content: Put a bit of sticker label over the hole in the buzzer. Works a treat for sound attenuation.

author: nfmax
author_rank: Super Contributor
timestamp: August 08, 2020, 07:53:36 am
content: Quote from: n5al on August 08, 2020, 04:47:01 amI was in a hardware store looking at a whole shelf full of the things: the ones with the 10 year lithium batteries. One of them was giving a low battery beep - but which one?
List of Electronics Youtubers - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: August 04, 2020, 12:13:22 am
content: I know there is a list already on this forum, but it hasn't been updated in a long timehttps://www.eevblog.com/forum/other-blog-specific/a/Not good having one person maintain it, so I thought I'd start a Google spreadsheet that anyone can edit and update.Ideally it would be a list on Wikipedia, but I'm not sure it's broad appeal enough to get on there.So if anyone wants to help edit it, or add/maintain your own listing, here it is:https://docs.google.com/spreadsheets/d/1JaUro5MjfvAqdHpxYAcKLznjfRJDCaP_WNo_gEg-b5Y/edit?usp=sharingThis post should be in the Other Blogs section, but wanted to get some initial exposure first, I can move it and pin it there later.

author: netdudeuk
author_rank: Frequent Contributor
timestamp: August 04, 2020, 05:39:11 pm
content: Added FeedbackLoop. Can't believe that he doesn't have a lot more subscribers.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: August 05, 2020, 06:05:04 pm
content: Oh hello, does language matter? There'shttps://www.youtube.com/channel/UCvv3bLR4Ws1GVycHG-t3dJwIt's in French.

author: n5al
author_rank: Contributor
timestamp: August 06, 2020, 07:22:47 am
content: Quote from: Alex Eisenhut on August 05, 2020, 06:05:04 pmThanks for the contribution. I can't speak French, but knowing Spanish at least lets me follow the gist of the conversation. I liked his introductory video, he has a good sense of humor!Introduction video:https://youtu.be/Qx4YqMXgGrA

author: pidcon
author_rank: Contributor
timestamp: August 06, 2020, 10:46:48 am
content: Added DIY Guitar Pedals from Australia.https://www.youtube.com/c/DiyguitarpedalsAu/

author: EEVblog
author_rank: Unknown
timestamp: August 06, 2020, 11:01:19 am
content: One interesting thing I noticed while doing this is that AvE is the only channel that hides his sub numbers. He also hides his Patreon income and number of Patrons.Didn't used to be like this, but something has clearly made him "go dark"

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 06, 2020, 12:39:23 pm
content: Should we have a separate page for listings that are not about electronics but of which are likely to be of interest to electronics hobbyists? For example, 3D printing, math, and physics.

author: EEVblog
author_rank: Unknown
timestamp: August 06, 2020, 01:19:59 pm
content: Quote from: NiHaoMike on August 06, 2020, 12:39:23 pmDifferent Tab in the same spreadsheet?
Jordan Pier on elitist attitudes for younger players - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: August 06, 2020, 12:28:49 am
content: I just saw one of Piers Morgans videos "Teal Admiral Vintage Color Roundie TV Analysis" and he said something interesting.https://youtu.be/xo_hRjY4cCg?t=277QuoteI believe I have experienced things like this before in colleagues and friends not wanting to teach younger generation things they have learned in their time.I spoke some director 10 years ago at a collegeQuoteI don't think it was an elitist attitude but I was interested in learning things that I am finding now on Youtube.What to do you think?Edit:How emabarassing I spelt the name wrong.

author: Homer J Simpson
author_rank: Super Contributor
timestamp: August 06, 2020, 12:37:29 am
content: "Piers Morgans videos"Well, not exactly.https://www.youtube.com/user/shango066/videos

author: MrMobodies
author_rank: Super Contributor
timestamp: August 06, 2020, 12:40:35 am
content: I have no idea how I spelt that wrongly, anyway I have noticed it after adding a few things and changed it but it is still in the title, I can't delete this tread. and I am going to ask if I can remove this thread.

author: Homer J Simpson
author_rank: Super Contributor
timestamp: August 06, 2020, 12:42:32 am
content: It's still a good thread !Point is good as is the question.As are both channels.Shag066 is one of my Favs.https://www.youtube.com/user/shango066/videosNot this one.This one.https://www.youtube.com/c/JordanPier/videos-K

author: Bud
author_rank: Super Contributor
timestamp: August 06, 2020, 01:12:52 am
content: How do you envision a logistics for such training/learning? Is a place for the lab needs to be rented? Who will pay for rent? Who will equip the lab? Who will pay for parts and materials? Those graybeard restoration experts are often lonely wolfs who do not possesses much social skills. Anyways, it is all just wishful thinking. If a kid is interested he will find a way to learn.

author: rstofer
author_rank: Super Contributor
timestamp: August 06, 2020, 01:48:01 am
content: It works the other way as well. Often, the younger people have less than zero interest in anything that old people find interesting. Just the way it goes sometimes.
Hiroshima 1945 - RAF  'Black Lancasters' - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: August 05, 2020, 11:03:33 pm
content: Some history I was not aware of.Plan to use Lancaster bombers to deliver the Hiroshima and Nagasaki bombs if B-29's could not be converted.
Starship SN5 completes 150m Hop - Page 1
Forum section: electronics / general

author: chris_leyson
author_rank: Super Contributor
timestamp: August 06, 2020, 03:48:14 am
content: https://www.youtube.com/watch?v=s1HA9LlFNM0&feature=youtu.beWell done SpaceX, only the second flight in history of a full flow closed cycle staged combustion engine.

author: Mr. Scram
author_rank: Super Contributor
timestamp: August 06, 2020, 04:00:02 am
content: There's another thread on this.https://www.eevblog.com/forum/chat/starship-prototype-150m-hop/
Techmoan video, tape cleaning machine. Seems to have a lot of 74xx chips. - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: July 25, 2020, 12:19:06 pm
content: @2:50Seems to be more chips than needed for the functions it has. What do you think?

author: filssavi
author_rank: Frequent Contributor
timestamp: July 25, 2020, 12:37:29 pm
content: My guess is that the auto rewind functions pre and post cleaning are implemented in digital logic (either FSM or specific timing logic). Probably that implementation is a lot cheaper (and more reliable) than an electromechanical one (no rubber belts to rot, felt to dry up and crumple away, plastic gears to strip, etc)

author: newbrain
author_rank: Super Contributor
timestamp: July 26, 2020, 08:54:32 am
content: Quote from: filssavi on July 25, 2020, 12:37:29 pmI second the idea of a small FSM: we see 7400, 74107and 74123, going from memory, they are NAND gates, flip-flops (JK?) and a monostable.So, more or less what you need to have some states and temporization.

author: eti
author_rank: Super Contributor
timestamp: August 04, 2020, 10:10:06 pm
content: Seems logical.
International working (specifcally in Russia) as an American - Page 1
Forum section: electronics / general

author: PythonGuython
author_rank: Contributor
timestamp: August 04, 2020, 01:04:35 am
content: Hey guys, first poster here. I'm an electrical engineering and Russian student. I don't have many people in my life with much experience in either of those fields so I was hoping I could get some perspective from some of you.I really want to work or live abroad in a Russian speaking country one day, or at least use the Russian language in a professional setting. Do you think there are opportunities to do that?I've never met anyone who has interned abroad, is that a thing that happens? And if so, where do I even begin to find opportunities like that? Whenever I mention Russian at career fairs they tend to laugh, which I suppose is understandable.

author: ataradov
author_rank: Super Contributor
timestamp: August 04, 2020, 02:18:17 am
content: Are you currently in Russia? The issue is that you would need to get work authorization, and many employers may not want to deal with that. Otherwise I see no issues. You do need to be competitive on the market, of course. Simply being an American does not put you forward in any way.I worked in Russia at companies that hired foreigners, and it was fine. But from their perspective it was a fight and the only reason they were doing it is that they really wanted to be in Russia. As usual, working abroad you will see more general bureaucracy-type issues than local people. But it is definitely possible.
6502 emulation on LCR-T4 component tester? - Page 1
Forum section: electronics / general

author: eti
author_rank: Super Contributor
timestamp: August 03, 2020, 11:56:55 pm
content: Hi there.How feasible is it to imagine that AVR emuation of a 6502 could be realised on the "LCR-T4" type component tester? These have excellent dot matrix LCDs - I am currently playing (very much flying blind, based on my current sub-primitive understanding of 6502!) with a 6502 emulation on an Arduino Mega 2560:https://github.com/mkeller0815/MOUSE2Go, but I feel this could(?) be ported or whatever, to the LCR-T4 (once I backup the tester firmware, trivial) as it has crude input (button) and display for O/P.Please note - I have no "goal" for this pursuit beyond that of playing and learning through said playing.Thank you for your help, I humbly bow to your knowledge.

author: ebastler
author_rank: Super Contributor
timestamp: August 04, 2020, 05:27:39 am
content: Quote from: eti on August 03, 2020, 11:56:55 pmIt is very easy to imagine.

author: ebastler
author_rank: Super Contributor
timestamp: August 04, 2020, 07:24:26 am
content: On a more serious note: What would you want to do with it?The I/O seems rather awkward -- a nice, but rather small screen, which neither matches the very limited display of the earliest 6502 computers (KIM-1, AIM-65), nor the larger CRT of the later ones (Apple 1 and 2, Commodore PET...). And no keyboard at all. You could connect a serial terminal, but then you don't need the on-board screen.If you want to dive into 6502 assembly language programming and the "early days, low level" experience, I would recommend that you start with a real 65(C)02 single-board computer. Many hobby projects are documented online; to name just one example, the author of the AVR emulator which you linked to has started with his own "real" 65C02 computer first:https://github.com/mkeller0815/MOUSEOr, of course, you could look for an old Apple II or PET!
"Lubricate" 2 Metal thinks? - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: July 29, 2020, 01:35:52 pm
content: HiI have a Airline Trolley with Alu Drawer and the inner Rails are a little bended so its hard to get them in and out.Is there a way to "Lubricate" it with something who is substantial and can use for long terms? Maybe the ordinary petroleum jelly?Silicone Grease? Weapon Oil?Thanks

author: Benta
author_rank: Super Contributor
timestamp: July 29, 2020, 04:08:44 pm
content: Try with a medium-duty lithium grease.

author: Monkeh
author_rank: Super Contributor
timestamp: July 29, 2020, 05:55:33 pm
content: Or you could.. fix it, instead of making the sticking point a little slippery.

author: Lord of nothing
author_rank: Super Contributor
timestamp: July 29, 2020, 09:22:05 pm
content: Well I dont know what happen. I dont investigated to much. I dont want say from what Airline it was. The did a horrible Paintjob to.The 2 Halfsize Trolleys are very fucked up. I need to fill some holes with that gui stuff and than a nice Lack Paint Foil should get on top to give then the nice Airline Look back.

author: m3vuv
author_rank: Super Contributor
timestamp: August 03, 2020, 09:55:47 am
content: ky jelly?

author: Lord of nothing
author_rank: Super Contributor
timestamp: August 03, 2020, 10:14:22 am
content: Wahts that?

author: Nusa
author_rank: Super Contributor
timestamp: August 03, 2020, 12:17:57 pm
content: White lithium grease would be my recommendation for this purpose. Not that any lubricant is likely to properly solve the problem you describe.Quote from: Lord of nothing on August 03, 2020, 10:14:22 amKy jelly is water-based personal lubricant. Wouldn't work very long in your application, but I doubt it was a serious suggestion.
NileRed makes YCBO superconductor and a EEVB-Dave move on a Chinese tube furnace - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: August 02, 2020, 03:43:43 am
content: Enjoy: (Dave move at 19min, 15sec)

author: alsetalokin4017
author_rank: Super Contributor
timestamp: August 02, 2020, 06:22:54 am
content: Fascinating!There were three things I would have liked to see though. The magnet track should have been able to hold the magnet beneath it as well as above it; a toroidal shape for the pellets might result in higher levitation; and spontaneous rotation of the magnet while suspended over the superconductor.
DigiKey support service - Page 1
Forum section: electronics / general

author: grg183
author_rank: Contributor
timestamp: July 29, 2020, 01:37:24 pm
content: Welcome to Digi-Key Live-Help. How may I assist you?Me 3:24 PMHi can you please check on order 12345678 ? I placed it 2 days ago and has not been shipped yetDigikey 3:25 PMokDigikey 3:26 PMOur trade compliance department is reviewing your order.Me 3:27 PMok when can I expect it to ship?Digikey 3:27 PMWhen they have finished their process.Me 3:28 PMand will that be today? tomorrow? next week?Digikey 3:29 PMI'm not in that department and have no idea when they will finish.Me 3:29 PMwell that's not very helpful is it?!Digikey 3:30 PMI'm sorry I'm not in that department.

author: Lord of nothing
author_rank: Super Contributor
timestamp: July 29, 2020, 01:54:34 pm
content: I had some trouble with my Distributor to. We try to get a Discount Code for a Dell Laptop to get them "up to" 50% cheaper.Are are maybe 4 Month on to.

author: wraper
author_rank: Unknown
timestamp: July 29, 2020, 02:00:50 pm
content: Seems to be related to ITAR.
Anybody here from Indianapolis??? - Page 1
Forum section: electronics / general

author: AcousticBruce
author_rank: Contributor
timestamp: April 11, 2013, 04:37:23 pm
content: I was just wondering how many people in this forum are from Indianapolis?I am from Indy and really like it here. I live downtown.

author: Dpc5
author_rank: Newbie
timestamp: July 28, 2020, 01:42:11 pm
content: I live on the Northside of Indy and new to electronics. I retired recently and interested in learning but having a difficult time with locating resources to teach me how to use an oscilloscope etc. I have purchased a fair amount of equipment but have very limited understanding of what to do with it. Lol My interest is mostly in repairing older quality audio equipment.

author: dr.diesel
author_rank: Super Contributor
timestamp: July 28, 2020, 01:52:50 pm
content: Terre Haute here.

author: CalMachine
author_rank: Frequent Contributor
timestamp: July 28, 2020, 07:22:29 pm
content: Quote from: dr.diesel on July 28, 2020, 01:52:50 pm/wave!!Fort Wayne here!
Standard dimensions of reels - Page 1
Forum section: electronics / general

author: Krumm
author_rank: Contributor
timestamp: July 26, 2020, 09:05:36 pm
content: Hello,As far as I am aware there are 7" and 13" reels, but I'm trying to find any accurate dimensioning of the centre part of a reel. I've found this datasheet (http://www.farnell.com/datasheets/1503681.pdf) from farnell, which would indicate an outer diameter of 20.2mm and an inner diameter of 13mm, but no indication of the dimensions of the driving 'spokes'. I'm guessing these must be standard dimensions for loaders to handle the reels from different manufacturers, but cannot appear to find what standards these are.Any suggestions where to look?Thank you.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: July 27, 2020, 12:14:25 am
content: http://noel.feld.cvut.cz/hw/motorola/books/sg73/pdf/5_12tape_msg.pdfhttps://www.diodes.com/assets/Tape%20Reel%20Files/tapereel_2.pdfSeems the big reference is JEDEC JEP130.

author: jmelson
author_rank: Super Contributor
timestamp: July 27, 2020, 03:30:25 am
content: I'm not sure what you are doing, but pick and place machines do not have to "drive the reel", so there are no spokes. Just a rod with a flange on the end to keep the reel from falling off. They usually have some kind of friction mechanism to keep the reel from spilling the tape onto the floor. it just takes the slightest drag on the reel to prevent that.Jon

author: Krumm
author_rank: Contributor
timestamp: July 27, 2020, 03:27:05 pm
content: Thank you both - appreciate it.
Picture attachment bug in the board software - Page 1
Forum section: electronics / general

author: Peabody
author_rank: Super Contributor
timestamp: July 25, 2020, 05:10:25 pm
content: I'm told there is a known bug in the picture attachment process, and indeed I recently had a picture which I attached to a post in one thread, and which looked fine at first, be replaced by a picture I posted in another thread. I believe in both cases these were end-of-message thumbnails, and the thumbnails were all correct. But when I later clicked on one thumbnail, the picture that came up was the one from the other thread. I'm also seeing lots of empty boxes in others' posts. And in some cases, some people can see the pictures, but others can't.Is there any information about what this bug is all about, and what can be done to keep it from striking (other than not posting any pictures)? Does it affect all forms of attachments (thumbs, full-size, inline, end-of-message)? Is there any prospect for a code update to fix it?

author: tooki
author_rank: Super Contributor
timestamp: July 25, 2020, 08:20:35 pm
content: Please search. It’s a known bug, no need for yet another thread discussing it.

author: Halcyon
author_rank: Unknown
timestamp: July 26, 2020, 03:14:35 am
content: Yep, we know about it. Gnif has been doing some testing behind the scenes. Not sure when it will be resolved, it's a strange one.
Does anyone have any spare EPROM/DIP storage tubes? - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: July 25, 2020, 05:35:05 am
content: I have a bunch of chips (see attached) which I need to find some sturdy packaging for so they aren't "flapping around in the breeze".Does anyone have ESD safe tubes suitable which they would be happy to get rid of for the price of postage (to Sydney) and a few drinks?

author: GlennSprigg
author_rank: Super Contributor
timestamp: July 25, 2020, 12:33:03 pm
content: Jaycar might have a bunch of tubes for 'free', from when they stock their trays??
Exoplanets - a Musical Parody - Page 1
Forum section: electronics / general

author: MK14
author_rank: Super Contributor
timestamp: July 25, 2020, 02:42:30 am
content: By coincidence, one of the main 'singers', I'd already listened-to/watched today (or recently).

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: July 25, 2020, 03:26:32 am
content: It's got a Stevie Wonder vibe to it.
Bell Labs Record magazine - Page 1
Forum section: electronics / general

author: Circlotron
author_rank: Super Contributor
timestamp: July 24, 2020, 01:40:48 pm
content: Sept 1925 to Dec 1961.454 issues.1.1GB.Plug this text file into your download manager and away you go!Collection is searchable using recoll.https://www.lesbonscomptes.com/recoll/
AD9102 and AD9106: Not recommended for new designs? - Page 1
Forum section: electronics / general

author: bloguetronica
author_rank: Frequent Contributor
timestamp: April 23, 2019, 10:38:55 pm
content: Hi,Today I was caught by surprise when I realized that the AD9102 and AD9106 were no longer recommended for new designs. As the poor documentation around these parts was not bad enough, I may add. However, Analogy Devices doesn't offer similar parts.It doesn't make sense to me that they are declaring these parts to be obsolete soon without providing alternatives. They don't have any chip suitable for arbitrary waveform generation besides the ones mentioned. I could get away by using a DAC and some discrete logic, but dual port RAMs are expensive and hard to find.What are your thoughts? Can you think of any alternatives?Kind regards, Samuel Lourenço

author: KE5FX
author_rank: Super Contributor
timestamp: April 24, 2019, 02:19:49 am
content: Hmm, that's odd. Those parts aren't even that old (2012). One of those Hittite execs must have worked his way up to the C-suite.

author: bloguetronica
author_rank: Frequent Contributor
timestamp: April 24, 2019, 09:58:49 am
content: Yup! It looks like that's it. I don't know if Analog is having trouble selling these chips or what, but they are shooting their own foot if they plan to discontinue those. Instead, they should focus on improving the datasheets. My two cents.Anyway, I was planning to build a projecto around the AD9102, and I still am. Most of my projects end up being one-offs irregardless, só I'm not too worried.Kind regards, Samuel Lourenço

author: croma641
author_rank: Regular Contributor
timestamp: July 23, 2020, 10:16:37 pm
content: I've found this AD9102 arbitrary function generator: complete project in Githubhttps://github.com/Frauschi/Funktionsgeneratorp.s.: the 9102 is recommended for new designs

author: 1design
author_rank: Regular Contributor
timestamp: July 24, 2020, 02:07:14 am
content: The official AD page shows them as in production:https://www.analog.com/en/products/ad9102.html#product-overviewhttps://www.analog.com/en/products/ad9106.htmlWhere did you find the information that they are being phased out?

author: KE5FX
author_rank: Super Contributor
timestamp: July 24, 2020, 08:14:37 am
content: For some time, they were marked NRND on the product page, in the same area of the page that currently says, "This product is appropriate for new designs but newer alternatives may exist."I guess an important customer recalibrated their attitudes.

author: tom66
author_rank: Super Contributor
timestamp: July 24, 2020, 09:24:14 am
content: Possibly someone pressed the wrong thing on the website manager.
Electronic text books? - Page 1
Forum section: electronics / general

author: fastguido
author_rank: Regular Contributor
timestamp: July 22, 2020, 04:04:34 pm
content: I am helping some people clear out their father's estate, there is a bunch of electronic text books college level. They mostly seem to be from the early nineties and before Is there any value to these?

author: ataradov
author_rank: Super Contributor
timestamp: July 22, 2020, 04:43:17 pm
content: There may be to people that like physical books. As far as I know there are no electronics-related books that would get you filthy rich, but some books have a decent value.

author: Johnboy
author_rank: Regular Contributor
timestamp: July 22, 2020, 04:45:34 pm
content: Generally, for college students who need to reference specific page numbers and readings, no. That's because textbook content is sort of "shuffled" between editions. In this way, brand new textbook editions can continue to command high prices. With the rise of eBooks and the ability of students to scan and share, new editions are not as hard to come by cheaply as they used to be.There are also a few texts that do retain value, partially because of the nostalgia factor, college days. Others are out of print for one reason or another, and there are people who want the all-inclusive older text that has to contain all the information and additional problems to work instead of one that comes with a CD for an ancient operating system. Books from the 1990's may or may not fit into this category, as that's when that transition really took off.It is impossible to know for certain whether what you have is worth anything without listing and researching the titles. I would do this by searching online with the ISBN number (found in the opening pages of each book near the copyright information) to determine how much they tend to go for, as each ISBN is almost always unique to that edition of the text. Amazon, AbeBooks, and BookFinder are generally indicative of going prices for used books.

author: Benta
author_rank: Super Contributor
timestamp: July 22, 2020, 06:24:14 pm
content: List title, author(s), publisher and revision here, please.I'm sure you'll find interested buyers sending PMs.
Forum Optioons to Subscribe to Specific Thread--Solved - Page 1
Forum section: electronics / general

author: DW1961
author_rank: Frequent Contributor
timestamp: July 22, 2020, 04:57:52 am
content: Solved:Subscribing to threads:PROFILE> FORUM PROFILEMODIFY PROFILE> NOTIFICATIONSTHE BOARD USES "NOTIFICATIONS" as a way to subscribe to thread, called "Current Topic Notifications." ""Current Topic Notifications" = both Notifications of posts is enabled and a list is generated for each of those threads you post to or start (your subscriptions).TWO OPTIONS TO SUBSCRIBE TO THREADS:1. You have to check "notify" on each thread you post in or createbeforein order to generate the "subscribed" threads list, again, called "Current Topic Notifications."2. In the NOTIFICATIONS settings, choose: " Turn notification on when you post or reply to a topic." You are automatically 'subscribed' to each thread you either post in or start.#2 will automatically allow you to get notifications when a reply is posted, and below that there will be a list of your "Current Topic Notifications" which is the same thing as a SUBSCRIBED thread. If you do not enable "notifications" you will not be notified when a reply is posted, nor will a list of your subscribed threads show up. (IMO, this should be enabled automatically.)You can find your "Current Topic Notifications" (Subscribed) threads on the same page, just scroll down. This page is where it all comes together:HOME>PROFILE>MODIFY PROFILE (drop down list on hover)>NOTIFICATIONSAll information to notify (subscribe) and a list of your subscribed/notified threads will be there.

author: Shock
author_rank: Super Contributor
timestamp: July 22, 2020, 12:47:38 pm
content: This is where notifications are configured and stored, it's similar to subscribing:https://www.eevblog.com/forum/profile/?area=notification;Discussed here:https://wiki.simplemachines.org/smf/Notifications

author: DW1961
author_rank: Frequent Contributor
timestamp: July 22, 2020, 06:11:49 pm
content: Quote from: Shock on July 22, 2020, 12:47:38 pmYes, I finally figured it all out and tried to remove my post, but it seems it did not get removed!
Machine Learning & Edge AI applications? - Page 1
Forum section: electronics / general

author: angust_uk
author_rank: Regular Contributor
timestamp: July 22, 2020, 02:31:06 pm
content: I keep reading about new hardware and software solutions for running machine learning on embedded platforms (this sort of thing:https://docs.edgeimpulse.com/docs/continuous-motion-recognition) and they always seem to use similar demos - things like gesture recognition using an accelerator or very basic speech recognition. This is all interesting but I'm struggling to figure out what sort of use-case this technology actually has the the real world (quite possibly just my lack of imagination).Does anyone here use machine learning on an embedded platform in their day job? If so, in what sort of end application? It seems to be touted as being 'the next big thing' but I'm trying to figure out how much of this is just hype versus actually being a useful alternative to more 'traditional' software approaches.
Software defined radio USB Not Recognized - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: July 20, 2020, 07:26:13 am
content: USB software defined radio dongle not detected by windows 10USB Device not recognized?does anyone else have this problem? any fix's?what version of Windows do the Russians use? , as they do not seem to have this problem.I seen a video by Dave ? maybe a mailbag episode? had this type of USB dongle, Assuming all is well with cheap SDR receivers. so I got this one.

author: edy
author_rank: Super Contributor
timestamp: July 21, 2020, 01:16:17 pm
content: You might want to see this thread in the HAM section of this forum:https://www.eevblog.com/forum/rf-microwave/bought-an-rtl-sdrv3-and-mla-30-loop!-advice-needed!/I bought myself an RTL-SDRv3 and also MLA-30 loop and have been going through the same installation questions. I got it to work both on Windows and Linux (my primary machine). There are a lot of configuration driver setup pages to help here:rtl-sdr.comSpecifically, there is some information about half way down this page on downloading Airspy/SDRSharp and installing the Zadig drivers and replacing Windows drivers:https://www.rtl-sdr.com/rtl-sdr-quick-start-guide/Many of these SDR's use similar Realtek tuner chip inside and in Windows you have to download some programs to change over the drivers because Windows 10 will by default either not recognize device at all, or think it is a DVB tuner based on the RealTek chip. So you have to replace the Windows driver. The tutorials on that page work for RTL-SDR but also for other dongles like Airspy and so on. Many of the tools are open-source independent projects as well as the drivers so you have to experiment.You may also wish to set up a bootable USB-based radio-specific operating system like this:skywavelinux.comIt has all the drivers pre-installed with tons of radio apps. You can bypass Windows and just see if your dongle is working without affecting your Windows installation at all. Just boot up and play, and then restart and you are back to Windows. However, I don't see why you can't configure your system properly. There is no special version of Windows the Russians are using... they are just installing drivers properly. Same goes for Linux. You have to follow all the tutorials and guides, of which there are plenty online.[UPDATE:]It appears the chip inside is NOT RealTek but Mirics MSi... here is a review:https://www.rtl-sdr.com/photos-of-the-msi-sdr-dongle-a-new-sdrplay-rsp1-clone/QuoteRead the comments also on the above page. Seems to be working fine, install the proper drivers and you should be able to get going. Here looks like a page with the proper drivers and SDRPlay software:https://www.sdrplay.com/downloads/
When were turned pin IC sockets first used? - Page 1
Forum section: electronics / general

author: Slothie
author_rank: Regular Contributor
timestamp: July 21, 2020, 03:41:46 pm
content: When were they first used out available? I need to know if they are appropriate for a 1978 repro computer (SCRUMPI) .

author: Benta
author_rank: Super Contributor
timestamp: July 21, 2020, 04:11:38 pm
content: Preci-DIP was founded 1976, so for a 1978 computer they're appropriate.

author: jpanhalt
author_rank: Super Contributor
timestamp: July 21, 2020, 06:10:55 pm
content: Mill-Max was founded 1971. Been around a long time too.
AutotroniK ba392v2 vs Neoden s1 - Page 1
Forum section: electronics / general

author: abhijittikate
author_rank: Newbie
timestamp: May 16, 2020, 06:34:40 am
content: We are looking to buy new pick and place machine and we shorten this two machine by specification , and didn't found that much budget difference so that i need to compare it by review .. so any suggestions ? or review from both users?

author: tracepusher
author_rank: Newbie
timestamp: June 02, 2020, 09:50:57 pm
content: Hello abhijittikate,I own Neoden S1. It is a pain to use. Despite the claims, it does not place 0201 well. Alignment is inconsistent and isn't good enough for 0201; and placement accuracy is also not good enough for 0201. Initial quality is awful- I've spent more time repairing mine than using it.

author: JanL
author_rank: Contributor
timestamp: July 20, 2020, 12:57:52 pm
content: I'm thinking about upgrading from neoden4 to neoden s1. What are the issues you are talking about? Can you be more specific?

author: wraper
author_rank: Unknown
timestamp: July 20, 2020, 01:00:21 pm
content: Quote from: JanL on July 20, 2020, 12:57:52 pmI heard that S1 is discontinued.

author: JanL
author_rank: Contributor
timestamp: July 20, 2020, 02:15:49 pm
content: I heard that S1 is discontinued.Ok, maybe that is why the S1 has disappeared from the main page of neoden and can't be found on alibaba.Any reason why?

author: wraper
author_rank: Unknown
timestamp: July 20, 2020, 04:36:51 pm
content: Quote from: JanL on July 20, 2020, 02:15:49 pmNo idea. You may also look at K1830.
Hand placing large boards - Page 1
Forum section: electronics / general

author: ezalys
author_rank: Frequent Contributor
timestamp: July 19, 2020, 01:26:00 pm
content: Let’s suppose I have a board with several hundred or so components on it and I only want one. I’m somewhat afraid of the paste drying before I finish hand placing. I’m also afraid of rushing and screwing up the placement. What’s the professional solution to this problem outside of programming a pick and place?

author: m98
author_rank: Frequent Contributor
timestamp: July 19, 2020, 01:40:20 pm
content: A manual PNP machine would be the way to go here. Also, there are pastes that don't dry out for days, Felder LPT3C-0100LF, for example.

author: ezalys
author_rank: Frequent Contributor
timestamp: July 19, 2020, 01:49:22 pm
content: Do you have a recommended manual PNP?

author: winniethepooh_icu
author_rank: Contributor
timestamp: July 20, 2020, 04:08:07 am
content: Do not be so intimidated by hand placement. You can easily place 100 passive parts in an hour, even 0402 parts. If many components are the same you can approach 200 per hour with ease.The time to set up and manually place with a manual PNP will be large compared to the time to hand place even with some mistakes.Place the board on a flat surface, tape down if it helps. Place a small amount of solder on one pad of each device footprint, always on the side that your hand is holding your iron, and place with tweezers and your other hand. First center the device with tweezers on the footprint, light pressure, then bring in your iron and let it sink into the soldered pad. Wipe iron up over the edge of the device if you think it isn't sticking. If you placed it at a bad angle, reposition your tweezers, heat the pad and move it. If you must re-position a ceramic capacitor, take care not to put force on it while squeezing with the tweezers as you may break it in half, but this is easy to deal with even if it happens.If you have QFN parts, spend more time aligning with a bright light on the side than you spend soldering them. Do not put solder on a QFN pad before placing it, these are placed first and soldered after careful alignment and holding down with the tip of the tweezers. Applying flux first will help with first pins that are soldered with a bit of solder already present on the tip of your iron.A good pair of tweezers and learning to apply the right amount of pressure will be faster than a manual PNP even with a large board. Problems are easy to fix if you solder one side of each device first.
I am looking to buy original Panasonic EVQP0E07K - Page 1
Forum section: electronics / general

author: Pcmaker
author_rank: Regular Contributor
timestamp: July 19, 2020, 03:20:40 am
content: I have a 2 12-year old gaming mice, the Steelseries Cataclysm mice. I can't use any other mice because they hurt my hand and I gotta still be able to perform well when gaming. So, I've been replacing the micro switches when they go out. I've made a thread about ithttps://www.eevblog.com/forum/repair/idenfitying-a-mouse-micro-switch/msg2851206/#msg2851206So, with help from you guys, I've identified the micro switch as Panasonic EVQP0E07K. I've bought some replacements from eBay and the amount of pressure needed to click the button is definitely different, so I'm assuming that they're not original Panasonic switches, but rather clones of it. They also have started to fail already.I went to eBay and bought some and the title was "Microswitch Panasonic EVQP0E07K replacement switch for mouse button Lot of 2pcs" and the seller is from Poland. I am hoping they are original Panasonics.I want to know if there's any site out there that will let me buy original ones that are guaranteed not to be fake, and will let me buy no more than 20 of them. The sites I've found don't even have pricing, and says to buy them in bulk of thousands.Any help?

author: wraper
author_rank: Unknown
timestamp: July 19, 2020, 03:25:15 am
content: https://www.digikey.com/product-detail/en/EVQ-P0E07K/P10843S-NDhttps://lcsc.com/product-detail/New-Arrivals_PANASONIC-EVQP0E07K_C395225.html

author: tooki
author_rank: Super Contributor
timestamp: July 20, 2020, 01:04:51 am
content: Quote from: wraper on July 19, 2020, 03:25:15 amIt boggles the mind that people will post for help without having done even a cursory search on google and/or the big parts distributors. :p
The stupid things we do...... - Page 1
Forum section: electronics / general

author: IanJ
author_rank: Unknown
timestamp: July 19, 2020, 04:10:39 pm
content: Hi all,It's becoming somewhat a habit.....I have 3 monitors on my Win10 workshop PC, I have my phone off to the left on a stand and an Ipad mounted above one of the monitors.The thing is, I find myself moving the Win10 mouse in the direction of the Ipad or phone if I want to do something there.........DUH!Anyone else?Ian.

author: Zbig
author_rank: Frequent Contributor
timestamp: July 19, 2020, 04:18:23 pm
content: I use a company-issued touchscreen-equipped laptop, a private touchscreen laptop, external non-touch monitor, smartphone and a tablet on a daily basis. I keep trying to poke things on my non-touchscreen external monitor, usually realizing my mistake halfway through, stopping my outstretched finger in mid-air.

author: Berni
author_rank: Super Contributor
timestamp: July 19, 2020, 04:21:59 pm
content: I do have an oscilloscope off to the side of my PC. But i instead made that workIts a scope running an embedded PC with windows, so i installed Synergy on it and put it into my LAN. Now i can move my cursor off the last screen and get onto the scope screen to click stuff around. The Synergy software communicates the mouse and keyboard presses over the network and executes them there. On top of it all it also mirrors the clipboard over. So i can just go to the scope, press PrintScr, go back to the PC and paste the screenshot into whatever.
Power Transistor Data sought - Page 1
Forum section: electronics / general

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: July 19, 2020, 10:58:01 pm
content: Does anyone have access to a datasheet of a very large Siemens power transistor labeled BTr F 0111 ?(It is stud mounted with M12 thread and 27mm across flats)

author: Chris_Walch
author_rank: Contributor
timestamp: July 20, 2020, 04:27:25 pm
content: The prefix BT is commonly used for thyristors, but I didn't find any with your markings.Please post a picture of the component.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: July 20, 2020, 07:41:30 pm
content: Marking details:BTr over F0111, around 90° to the right: 5A, around 45° left: symbol of NPN transistor, around 90° left: SH logo over SIEMENSStamped on one flat of hex nut: A2550And here it is:

author: Benta
author_rank: Super Contributor
timestamp: July 20, 2020, 08:13:13 pm
content: Wow, that looks really 60s, perhaps early 70s.A wild guess would be an automotive part for ignition coil drive.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: July 20, 2020, 08:51:52 pm
content: @Benta: Although the fusion of the various parts into the Siemens AG was effected in 1966, the Logo with the S and the H was purpotedly in use until 1973, when a unified Logo was in use. This would support your assessment.
Beetle-mounted camera streams insect adventures - Page 1
Forum section: electronics / general

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: July 18, 2020, 11:21:11 pm
content: "The entire camera rig weighs just 250 milligrams, which is about a tenth of the weight of a playing card."While the sensor itself is low resolution, capturing just 160 by 120 pixel images, it is mounted on a mechanical arm that can shift from side to side."https://www.bbc.com/news/technology-53445772
How to write a disclaimer... - Page 1
Forum section: electronics / general

author: LektroiD
author_rank: Frequent Contributor
timestamp: July 16, 2020, 11:22:32 pm
content: I found this gem on an Atari monitor repair sheet...Disclaimer:You can easily get knocked squarely on your butt by the voltages present in your monitor. Whether or not it kills you probably depends on just what you fall on, your present health, and where the resulting flying monitor lands. In any case, your decision to implement the changes described herein is completely your own. I disclaim all responsibility for your health, safety, or any damage to equipment or property caused by fires, implosions or explosions, earthquakes, global flooding, or galactic imbalance resulting from your use of any information in this writing. I think that about covers it

author: GlennSprigg
author_rank: Super Contributor
timestamp: July 17, 2020, 11:05:05 am
content: I've always liked this product disclaimer in relation to clothing....

author: Halcyon
author_rank: Unknown
timestamp: July 18, 2020, 11:15:06 pm
content: Hahah, in all seriousness, disclaimers that are written in simple, plain English are almost always preferred. Same goes with EULAs. Hardly anyone reads those long winded agreements written in legal-ese and in some cases in Australia, they have actually been deemed illegal and unenforceable by the courts because they are too cumbersome to read or difficult to understand and so they are deemed "unfair" to consumers.Under the Australian Consumer Law, courts determine whether contracts are sufficiently "transparent" and that transparency includes whether or not the contract is expressed in reasonably plain language, legible, presented clearly and whether it's readily available to any party affected by the term. Terms that may not be transparent include terms hidden in fine print or schedules, or that are phrased in legal, complex or technical language. However, a transparent term can still be an unfair term. EULAs, licensing agreements etc... are all considered "contracts" under the law.