hybridfree/eevblog-posts huggingface dataset:
TSMC to delay Arizona fab. [Duplicate Post, Locked] - Page 1
Forum section: electronics / general

author: schmitt trigger
author_rank: Super Contributor
timestamp: July 21, 2023, 04:12:45 pm
content: Due to a shortage of skilled workers.That is what happens when a country outsources wholesale an industry. The old skilled workers who had the knowledge retire, and there are no younger generations to be trained and to “carry the flag”.https://www.bbc.com/news/business-66264392

author: ataradov
author_rank: Super Contributor
timestamp: July 21, 2023, 04:39:23 pm
content: Why another topic on the same subject?

author: schmitt trigger
author_rank: Super Contributor
timestamp: July 21, 2023, 05:44:46 pm
content: When I was originally posting this thread, the website sent an error message. I exited and looked around to see whether it had actually posted. It had not. So I re-wrote and re-posted the other, now duplicate thread.Is there a way to erase this one?

author: ataradov
author_rank: Super Contributor
timestamp: July 21, 2023, 05:51:02 pm
content: I reported this as a dup, mods will clean it up. There is no way to delete the topic yourself.

author: gnif
author_rank: Unknown
timestamp: July 21, 2023, 06:14:34 pm
content: Quote from: schmitt trigger on July 21, 2023, 05:44:46 pmAny chance you can provide the error you received so I can investigate this?

author: schmitt trigger
author_rank: Super Contributor
timestamp: July 21, 2023, 06:33:45 pm
content: Unfortunately, I didn’t do a printscreen. Sorry!But it was something like “buffer full”, or words to the effect.

author: gnif
author_rank: Unknown
timestamp: July 21, 2023, 06:42:21 pm
content: Quote from: schmitt trigger on July 21, 2023, 06:33:45 pmGenerally this kind of error (buffer related) is the HTTP server itself (nginx) hitting a request content size limit. If it happens again please take a screenshot and private message me with it. I don't think the forum software (SMF) ever generates such an error directly.Closing this thread to cleanup the forum.Edit: Confirmed, SMF will never report any "buffer full" like errors directly, it either came from Nginx (logs indicate it didn't) or the client's browser itself had an internal issue. All traffic for the OP's IP shows only success responses, no errors, indicating (but not necessarily proving) it was a client side issue.
Sketchy Siglent SDS1102A? - Page 1
Forum section: electronics / general

author: ElectronSurf
author_rank: Regular Contributor
timestamp: July 26, 2023, 01:03:59 pm
content: Hi, There's a seller in our area (middle east) who sells a brand new Siglent SDS1102Afor good price, imported from china he claims.The problem is that I can't find this variation with A suffix anywhere except this one fromalibabaandaliexpress.I contacted Siglent.eu support about this and they told me that they use to sell this variation in US but not anymore.So what do you guys think? I fear that it may be a rebrand or some used scope or who knows what. should I order it?I have to say that this is the only seller of a few Siglent scopes in my country.

author: tom66
author_rank: Super Contributor
timestamp: July 26, 2023, 01:30:23 pm
content: Possibly old stock, but if it is a US model, you would want to make sure it is compatible with 240V. It is unusual not to have a universal voltage input SMPSU, but test equipment seems to be one area where this is still practiced (and not just on items with AC transformers).

author: ElectronSurf
author_rank: Regular Contributor
timestamp: July 26, 2023, 01:38:49 pm
content: Quote from: tom66 on July 26, 2023, 01:30:23 pmAnother problem is that I can't find a firmware for this model,link.Another link.

author: tautech
author_rank: Super Contributor
timestamp: July 29, 2023, 01:32:48 am
content: Quote from: ElectronSurf on July 26, 2023, 01:03:59 pmCorrect, it's a China only model.https://www.siglent.com/products-overview/sds1000a/QuoteNever the A in my 10yrs experience however the SDS1002CML+ is still a current range with specs very similar to the A variant.QuoteGet one of their official western market models, all are listed here:https://int.siglent.com/products/oscilloscopes
Indian Moon Mission Launch Chandrayaan 3 - Page 1
Forum section: electronics / general

author: iMo
author_rank: Super Contributor
timestamp: July 14, 2023, 09:03:36 am
content: Launch in 3 minutes..Quote

author: RoGeorge
author_rank: Super Contributor
timestamp: July 15, 2023, 03:37:54 am
content: What does "end-to-end landing" means?

author: Kim Christensen
author_rank: Super Contributor
timestamp: July 15, 2023, 04:45:31 am
content: I think by "end-to-end" they just mean a successful mission. ie: Going from the ground on Earth to the ground on the Moon, successfully, without crashing this time.
A Real-Life Tricorder!  from The Signal Path. - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: July 22, 2023, 10:44:58 pm
content: Complete demo and explanations of the physics on how it works.

author: KE5FX
author_rank: Super Contributor
timestamp: July 22, 2023, 11:30:30 pm
content: Great presentation in this one, Shahriar's really outdone himself.All it's missing is a teardown.

author: BrianHG
author_rank: Super Contributor
timestamp: July 24, 2023, 05:11:20 pm
content: Am I correct in understanding that the tricoder uses the change of angle of incidence from the directional laser's output, subtracting out the before waveform where the laser was in direct focus of the surface of the container with the afterm a general illumination of the container, to see through the plastic/glass container to analyze the contents inside, correct?

author: helius
author_rank: Super Contributor
timestamp: July 24, 2023, 05:19:41 pm
content: A collimated laser isn't really in "focus" anywhere. What they use is a shift in the spacing between the laser and detector. Knowing the angle of incidence and the angle of reflection, the distance to the target is a function of that spacing. If the target distance is inside the object, then the detected light must be reflected from inside the object.That is why there are crossing aiming markers that allow for consistent placement of the OUT at the correct distance from the sensor head.
Can anybody ID a LED regulator chip JWB7J ? - Page 1
Forum section: electronics / general

author: jmelson
author_rank: Super Contributor
timestamp: July 10, 2023, 01:33:09 am
content: I'm reverse engineering an LED module, that apparently has a current regulator chip in a 6-pin SMT package, that bearsthe label JWB7J. I've tried to cross-reference this part with no luck.Thanks much for any help!Jon

author: TimNJ
author_rank: Super Contributor
timestamp: July 10, 2023, 04:34:37 pm
content: JW is most likely for:JoulWatt:https://www.joulwatt.com/en/products_218.html#d1But, not sure about the B7J. You can search through LCSC by manufacturer and see if any of the photos show JWB7J. If not, well, at least you know which PNs aren't JWB7J.

author: jmelson
author_rank: Super Contributor
timestamp: July 11, 2023, 12:18:11 am
content: Quote from: TimNJ on July 10, 2023, 04:34:37 pmThanks a LOT! I think this is the manufacturer, but they are REAL tight about their datasheets! All you get is ONE page!Jon
Impressive Talking Animatronic Home Assistant project - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: July 09, 2023, 03:08:03 pm
content: video- The coolest robot I've ever built by workshop nation YTas a DIY electronics project.this is get to be the most impressive modification of a home assistant device to date.using all manner of electronics & fabrication.arduino, animatronics , 3d printing , modeling ,kitbashing..
Future-proof discretes - Page 1
Forum section: electronics / general

author: DannyCoates
author_rank: Newbie
timestamp: July 12, 2023, 02:30:50 pm
content: Europe and USA are building fabs to "secure" their production of electronics but the news articles seem to refer to only processors or high power switches.What about really low-level discretes, including transistors? I'm sure everyone will agree you can't build anything useful with CPUs alone.At the moment it's difficult to find discretes where the COO isn't the Far East. Do you think these will eventually be put into production in the West?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: July 12, 2023, 04:08:00 pm
content: Discretes, most power management ICs, signal conditioning, etc. are commodity items. There's absolutely no profit motive to supply them in the west, at least until such state as they aren't available on the world market -- like any other commodity.Even at the height of the cold war, there was nonzero trade between US and Russia, for example. I... -- Actually, I'm quite far from an expert on the history of international trade, so, I might not be making the point I meant to make here in the first place. But anyway, more just to say that, even if things go *very* wrong in the immediate future, basic items may remain available. How basic, depends on how "wrong" things are going at the time.A more interesting point to raise might be, how inhomogeneous that availability is. I would expect the mechanism is more by tariff and embargo than outright lack of supply. The question then is: how onerous is it to bypass those restrictions, whether by merely paying the premium, or stacks and stacks of trade permits, or circuitous routes through other trading partners (laundering, as it were)... The consequence being, trade might not be restrictedoutright, even in terms of overall quantity shipped, but it might also only remain available to the largest or richest customers. You know, welcome to USA, megacorp rules all, business as usual.Probably some strong reasons to build new plants right now are:1. Simply to satisfy demand. The profit margins might not be much right now, but still enough to justify the expenditure based on projections.2. High technology is the most vulnerable. It's large and pricey items, and they're regularly subject to trade restrictions already.3. High technology is the most profitable. If a facility in a given location is likely to become unavailable for that purpose, it makes sense to either move it, or build a new one.Tim
[Conversational piece] Some security vulnerablity in server SW fixed recently? - Page 1
Forum section: electronics / general

author: ballsystemlord
author_rank: Frequent Contributor
timestamp: July 08, 2023, 04:20:20 pm
content: Both mouser and verical, both electronics component suppliers, are currently down for maintenance.I'm curious, has there been a big SW security bug fixed recently?The stars aligned and both teams are just accidentally working in sync?Or maybe something else?What do you think?
Secrets of a $182 Billion Chip Maker: AMD's Labs | Full Documentary - Page 1
Forum section: electronics / general

author: Black Phoenix
author_rank: Super Contributor
timestamp: July 08, 2023, 03:30:57 pm
content: https://youtu.be/7H4eg2jOvVwBasically a tour of the AMD Austin Labs. It is a long video, with some insights of how a product is iron out before being launched.

author: RoGeorge
author_rank: Super Contributor
timestamp: July 08, 2023, 04:03:37 pm
content: Thank you, very interesting tour.I didn't know there could be that many SMA connectors on a test motherboard!
Maha MH-C9000 zener diode identification - Page 1
Forum section: electronics / general

author: TheGrave
author_rank: Contributor
timestamp: July 07, 2023, 09:50:10 pm
content: Hi,One of my slots on the C9000 charger is having issues and this diode seems to be dead:https://i.ibb.co/GCbswy6/IMG-0f30a084cec30f60cc956c5e8d3fc542-V.jpgCan anyone help me with the identification? Guy troubleshooting it measured voltage around 4.96V on its healthy brothersWe were having issues identifying it by the colour code (if this is possible at all).Cheers
Video: Time to Say Goodbye, Floppotron 2.0 - Page 1
Forum section: electronics / general

author: rsjsouza
author_rank: Super Contributor
timestamp: June 13, 2022, 11:29:15 pm
content: I love this project!

author: bill_c
author_rank: Regular Contributor
timestamp: June 14, 2022, 01:26:29 am
content: Neat!Kinda wished it was the portal song though.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: June 20, 2022, 03:31:57 pm
content: Live long and prosper.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: July 04, 2022, 03:54:04 am
content: Now it wants to break free. And kill all humans, presumably...

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: December 01, 2022, 09:49:20 am
content: Walk of Life. Should have instead picked Industrial Disease from that band's catalogue..

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 29, 2023, 09:31:19 am
content: The HDD clicking is disturbingly triggering.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: July 07, 2023, 09:46:19 am
content: Slightly off topic but thought some might find this interesting:Pink Floyd The Wall But With The Mario 64 SoundfontTrack indexes in the description.
Appa (Appatech) instruments. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: January 03, 2011, 09:51:41 pm
content: Does anyone have any experience on those instruments? I recently discovered this brand.http://www.appatech.com/appa_index.php

author: Hydrawerk
author_rank: Super Contributor
timestamp: September 03, 2015, 08:28:11 pm
content: Nobody? Really?

author: wraper
author_rank: Unknown
timestamp: September 03, 2015, 09:01:14 pm
content: I don't have used APPA equipment. But from what I have read about them, they make something mediocre. Seem to be better than Uni-T but significantly worse than Brymen.

author: retiredcaps
author_rank: Super Contributor
timestamp: September 03, 2015, 09:11:22 pm
content: APPA tech meters are resold by others under their own brand name. Tektronix, Ideal, Amprobe and others that I can't think of right now have all rebranded APPA meters as their own.Teardowns, reviews, etc on APPA meters can be found on eevblog by using search.

author: retiredcaps
author_rank: Super Contributor
timestamp: September 03, 2015, 10:29:40 pm
content: Examples,https://www.eevblog.com/forum/chat/buying-a-pocket-dmm/msg746454/#msg746454https://www.eevblog.com/forum/testgear/westward-rms-multimeter-(appa-isotech-105r)-teardown/http://mrmodemhead.com/blog/ideal-carbon-footprint/https://www.eevblog.com/forum/repair/tektronix-dm254-(service)-manual/

author: Hydrawerk
author_rank: Super Contributor
timestamp: September 04, 2015, 12:53:40 pm
content: Thank you.

author: CosteC
author_rank: Regular Contributor
timestamp: July 06, 2023, 11:25:07 am
content: I got APPA72 for circa 20 years. Works still, got couple of scratches obviously.Got A1 cute clamp meter in work. Except short battery life it is extreemly useful. I think Fluke has it in yellow colour.APPA 703 is very good LRC meter.APPA is more industrial than laboratory equipment. Rather solid, robust non-nonsense equipment than gadget-full toys from China.They have meters specialised for particular type of work: PV, HVAC etc
Help to identify this 2  IC                             - Page 1
Forum section: electronics / general

author: sabian
author_rank: Newbie
timestamp: July 05, 2023, 05:49:01 pm
content: Hi my friends could someone please help to identify what kind of integrated circuit is this two from the foto that i attach?it is from an 9s12 programmer from CGPRO.thank in advace!!!
[Article] remembering Walter LeCroy - Page 1
Forum section: electronics / general

author: globoy
author_rank: Frequent Contributor
timestamp: July 11, 2023, 01:31:48 am
content: This might of interest to this crowd. An article about Walter LeCroy, founder of LeCroy Corporation, who passed on May 10. Apologies if this ran already. I did a quick search but didn't find it.https://www.teledynelecroy.com/walter-lecroy/and his obithttps://www.legacy.com/us/obituaries/name/walter-lecroy-obituary?id=51970873Seems like a nice fellow and good boss.

author: SiliconWizard
author_rank: Super Contributor
timestamp: July 12, 2023, 01:16:18 am
content: Must have been great to work at LeCroy. I still have a 9354AL. 4 channels, 500Mhz bandwidth, 2GSa/s, 8MSa of sample memory.

author: Stray Electron
author_rank: Super Contributor
timestamp: July 12, 2023, 04:03:33 am
content: I have a couple of the 9354s. They'regreatscopes! I wish that I had discovered them years sooner.

author: alm
author_rank: Super Contributor
timestamp: July 12, 2023, 11:06:10 pm
content: I liked this quote from his obituary:Quote

author: Stray Electron
author_rank: Super Contributor
timestamp: July 12, 2023, 11:14:29 pm
content: Quote from: alm on July 12, 2023, 11:06:10 pmAssuming that he hired people that are willing to LEARN from their mistakes, that's not a bad approach. I used to have a sign over my desk that said "Good Judgement comes from experience. Experience comes from bad judgement."
Modeling/designing a quasi-peak (digital) detector - Page 1
Forum section: electronics / general

author: MPM
author_rank: Newbie
timestamp: July 03, 2023, 05:32:21 pm
content: There is a need and desire to try to simulate a digital quasi-peak detector. In the Internet I found very little information (mostly articles), which, moreover, implies experience and knowledge. Many textbooks contain only the definition of quasi-peak detector and its circuit. Maybe someone can suggest modern literature on this topic? Or maybe there are ready-made models on the Internet (Simulink, although I have not found any:))?

author: RJSV
author_rank: Super Contributor
timestamp: July 04, 2023, 12:33:55 am
content: This problem (most likely) would show a huge contrast, between using a coding solution, paying basically very little for uP hardware, while a solution using hardware is complex.Assuming you are encountering an analog to digital conversion output stream, you would need a digital comparator, perhaps 10 bits or 12 bits to compare for greater than, less than, and equal to, with a store operation for case when the newer value is larger. (That's ignoring any polarity, (plus or minus voltage value). Just accounting for the value sign is going to be a mess.You would 'save' a latest, largest value, which calls for some BUS hardware resembling a processor type set-up. Plus you need a flag or two, indicating what stage or state the process is in. Like, when first starting out, save a sample value, then set the flag that indicates this is the biggest (biggest positive or biggest negative) and then proceed to repeat converting and testing each next value.Coding that would, also be messy, but would not require that each little functional fragment has to involve more IC's hardware.

author: MPM
author_rank: Newbie
timestamp: July 04, 2023, 05:24:57 pm
content: Thx for answer, but that sounds too complicated and incomprehensible. I just want take my raw data, feed their to digital model of QP detector (for example Simulink) and get an output value. I will compare the obtained output values with the values of the commercial device. The problem is that I have never designed digital filters. I want to try to find an example to start with and do by analogy.
Guidence regarding posting a teardown... - Page 1
Forum section: electronics / general

author: ballsystemlord
author_rank: Frequent Contributor
timestamp: July 03, 2023, 04:13:12 am
content: This is probably listed somewhere in the forums but I cannot recall what to do in this instance.Because teardowns involve showing images of the equipment, and that means lots of little chips, with even smaller markings, thus requiring large photos, what does one do to post such a thing? Mine are about 1MB in size each. And there are quite a few of them.Do I do:A separate blog?Upload images to some other site and then link them in? Does raw HTML work here somehow?Just tell everyone that wants to actually see the chips to "go jump in a lake"?Something else?Thanks!

author: RoGeorge
author_rank: Super Contributor
timestamp: July 03, 2023, 05:20:44 am
content: If you want the pictures small in disk size, make normal JPG then reduce the JPG quality at 50%. If not small enough, resize smaller the number of pixels then save them as JPG at 50% quality. For this I used to use GIMP.After a while, made a small script function instead of manually editing with GIMP, called the function "webify" and add it to the ~/.bashrc file. It is using a standard tool called "convert", the main line is this:Code:convert PICTnnnn.JPG -strip -matte -resize 1024 -quality 50% -sampling-factor "2x2, 1x1, 1x1" PICTnnnn_s.jpgAt width 1024 as I use for casual posting close-up of electronics, the size is somewhere between 50kB-100kB, sometimes less.Sure, all other options you listed are valid and can be used here, each with their own pros/cons. This sticky topic in the "General Technical Chat" section was also about making/posting pics:https://www.eevblog.com/forum/chat/how-to-make-decent-photographs-for-forum-postsarticlespublications/

author: ballsystemlord
author_rank: Frequent Contributor
timestamp: July 03, 2023, 12:38:52 pm
content: My problem isn't that I can't take decent photos, although I'm not the best in the world, it's that I'm concerned that they'd end up will too low a resolution or too compressed if I uploaded them here.

author: Berni
author_rank: Super Contributor
timestamp: July 03, 2023, 12:52:06 pm
content: The forum preserves fully image quality. You just have to make them small enough to fit into the file size limits. There are also limits per post, so in that case you can just reply to your own post a few times to fit in all the images.A JPEG with carefully set compression settings is indeed the way to go in fitting lots of detail in a small file size photo.

author: Ranayna
author_rank: Super Contributor
timestamp: July 03, 2023, 01:19:14 pm
content: You can also externally host your images and embed them here.Noopy does that for his excellent die images which would be way to large to upload to the forum. They are all hosted on his website and embedded here.Just make sure that this storage is reliable. It is very annoying if an image hoster dies and posts here turn useless.
RIP Don Lancaster - Page 1
Forum section: electronics / general

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 29, 2023, 04:02:57 am
content: https://gilaherald.com/obituary-for-don-lancaster/Website is still up. No news on it (likely because he hand-wrote / managed it?):https://www.tinaja.comTim

author: globoy
author_rank: Frequent Contributor
timestamp: June 29, 2023, 03:40:45 pm
content: RIP Don Lancaster! I was a young boy when I got a copy of your book "TV Typewriter" and pored through its pages. I so wanted one but at the time it was way out of my league to build.

author: MK14
author_rank: Super Contributor
timestamp: June 29, 2023, 06:25:44 pm
content: Yes, RIP Don Lancaster!Who managed to write some nice books.Reminds me of this thread:https://www.eevblog.com/forum/chat/was-don-lancaster-really-a-guru/msg1945789/#msg1945789

author: KE5FX
author_rank: Super Contributor
timestamp: June 29, 2023, 07:13:58 pm
content: Sad to hear of Lancaster's passing, but the obituary certainly recounts a life well-lived. He sounds like a good egg.And the ads on that page are just plain hilarious. ("Jail sucks! I can help", next to some generic through-hole PCB traces.)

author: 2N3055
author_rank: Super Contributor
timestamp: June 29, 2023, 07:47:21 pm
content: Yes, RIP..He was quite eclectic persona, but his left field thinking was why I liked reading his articles...It was reminder to always try to look at things from different standpoints...All in all, unusual but good person...One of the interesting ones...
identifying 1.4 x1.2 mm 4 pin molded,  RA marking component - Page 1
Forum section: electronics / general

author: Gyorgy Albert
author_rank: Contributor
timestamp: June 29, 2023, 09:01:50 am
content: Hello everyone,I am trying to identify the component in the image. The molded body is 1.4 x 1.2 mm. The marking is RA (and for sure it is not the Infineon BF772). It is a RF/Microwave transistor, it is used in a 5 GHz amplifier stage. I have not found anything about it on all known places. I just have a hunch, that it might be a former NEC (actually Renesas) part.Any help is welcomed.Thanks,Gyorgy
Modelling transistor, parasitic inductances effect - Page 1
Forum section: electronics / general

author: 807108
author_rank: Newbie
timestamp: June 28, 2023, 09:27:19 am
content: Hi,I´m trying to model the real performance of a transistor in a SPICE programm (SIMetrix). I´ve noticed that the model I´ve downloded has modelled the parasitic inductances and resistances, so I´ve tried to delete them (only the inductances) from the .lib file and place them in the circuit to get such a equivalent circuit but it doesn´t work well. Then I read in the .lib file that the inductances have some dependency on the transconductance. For example, Lg is the parasitic inductance in the gate so the line is "Lg gate g1 {Lg*if(dgfs==99,0,1)} " where dgfs is refered somehow to the transconductance. So I don´t know if I have to model an equivalent circuit for the transconductance or simply I´m missing something.The transistor model is ISC030N10NM6 from Infineon.Hope someone can help me!
Part number for this common wire-to-board connector? - Page 1
Forum section: electronics / general

author: JetForMe
author_rank: Contributor
timestamp: June 26, 2023, 01:46:55 am
content: I've spent an hour combing through DigiKey and Mouser and I can't find this exact part. It's 2.45 mm (0.100") pitch, 2-position. The part of the plug that slides inside the receptacle is 5.8 mm x 4.15 mm. Pictures attached (for the life of me, I can't figure out how to get images inline).

author: JetForMe
author_rank: Contributor
timestamp: June 26, 2023, 01:48:27 am
content: Wow, and they didn't even attach, afaict.

author: mengfei
author_rank: Regular Contributor
timestamp: June 26, 2023, 01:59:16 am
content: tryhttps://www.alibaba.com/product-detail/Molex-2510-2-54mm-pitch-3_60615075872.htmlhttps://www.enrgtech.co.uk/product/rectangular-cable-assemblies/ET16777611/15133-0202https://sa.rsdelivers.com/product/molex/15133-0203/molex-2-way-female-pico-clasp-to-2-way-female-pico/1348942you could also do an image search on the web for fast results too

author: gnuarm
author_rank: Super Contributor
timestamp: June 26, 2023, 02:26:03 am
content: Hirose makes a lot of connectors like this. Digikey sells them, although I don't know they carry the entire line. Connector manufacturers make alotof different connectors, often not compatible with anyone else's connectors, even the old standby, 0.1 inch 25 mil post parts. The pins have many different lengths and the sockets have many different depths.

author: tom66
author_rank: Super Contributor
timestamp: June 26, 2023, 12:37:25 pm
content: Looks quite similar to a standard JST connector.One of these:https://www.mattmillman.com/info/crimpconnectors/common-jst-connector-types/

author: SiliconWizard
author_rank: Super Contributor
timestamp: June 26, 2023, 09:53:54 pm
content: I would say JST as well. The XH series. The pitch is formally 2.5mm.

author: JetForMe
author_rank: Contributor
timestamp: June 27, 2023, 12:58:10 am
content: Quote from: SiliconWizard on June 26, 2023, 09:53:54 pmYeah, pretty certain this is it! Although I looked more closely at the receptacle housing, and it has "21 JSW" embossed on it. The plug has "Q2" and "HJSY" embossed on it.Thanks!

author: tooki
author_rank: Super Contributor
timestamp: June 27, 2023, 07:23:30 am
content: Yep, it’s 100% a JST XH connector — well, a clone of it (the genuine ones are marked JST). I’ve used them many times.As SiliconWizard said, it’s a 2.50mm pitch (even if the aliexpress listings often erroneously call them “XH2.54”). Depending on your PCB hole sizes, you can usually fit up to about a 10-position XH into a footprint intended for a 2.54mm header.

author: EPAIII
author_rank: Super Contributor
timestamp: June 27, 2023, 10:45:34 am
content: A good magnifying glass is an absolute necessity in electronics now-a-days. 5X, and10X Hastings Triplets are good choices.
80c188XL   CS chip selection outputs, how to configure them? - Page 1
Forum section: electronics / general

author: ooorobertoooPL
author_rank: Newbie
timestamp: June 23, 2023, 11:00:48 pm
content: HEY, I am designing a system based on the 80c188xl processor and it has PCS0 / PCS4 outputs, I / O systems will be connected to these outputs, the documentation does not provide detailed information or an example of how to configure them and how to refer to these outputs, does anyone have information or ready an example of how to handle these outputs programmatically, thanks a lot!

author: PlainName
author_rank: Super Contributor
timestamp: June 25, 2023, 09:00:45 pm
content: They are chip selects and become active (low) when an address in the appropriate range is accessed. So PCS0 covers the range 0-127, PCS1 is 128-255, etc. The base address is configurable on a 1K boundary, so suppose you configure the base address for 0x1000 then PCS0 is active if you access 0x1000 to 0x107F, PCS1 from 0x1080 to 0x10FF, etc.The base address is set via the upper 9 bits in the PACS register (that is, bits 15..6). The lower 3 bits determine the wait states and used of RDY.You don't directly drive the pins. If you want I/O that you can set to a state and have it stick then you would just a latch connected to the data bus (even jut one or two bits would be fine) and then use PCSx and WR to clock in the data.
Wheels for Trains made of paper, YES Full Sized passenger trains. - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: June 25, 2023, 06:23:08 pm
content: Wheels for Trains made of paper, YES Full Sized passenger trains.Ok, this is an oddball, but it did happen:

author: langwadt
author_rank: Super Contributor
timestamp: June 25, 2023, 07:05:58 pm
content: and clutcheshttps://youtu.be/81EnqF9VMms
Unable to upload an .asc attachment? - Page 1
Forum section: electronics / general

author: ledtester
author_rank: Super Contributor
timestamp: June 24, 2023, 07:59:22 pm
content: Hi - I just had problems uploading an LTspice .asc file as an attachment to a post. I kept on getting the error "Your session has timed out" (see pic below).It happened both if I used drag-n-drop or the "Choose File" button.I had to change the suffix of the file to .txt in order to get it to upload.

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 24, 2023, 08:34:37 pm
content: Same for me - something is broken here

author: DavidAlfa
author_rank: Super Contributor
timestamp: June 24, 2023, 09:02:08 pm
content: Yep, fails with asc extension. Just zip it
1950's Printed circuit design - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: June 14, 2023, 05:09:09 pm
content: A movie about PCB design from the 1950's, a step forward from hand to hand wiring, and a slow beginning to the modern PCB. None of the methods show there, aside from the potted assembly, are used currently, but you can see how the modern PCB came from this beginning research, even if it all is now totally obsolete to a great part.

author: VK3DRB
author_rank: Super Contributor
timestamp: June 15, 2023, 12:39:47 am
content: Fascinating. The days of manual resist tape weren't so bad after all. Incredibly manual and tedious work by the looks. I liked the manufacture of the integrated circuit by potting. IBM was making integrated circuits as far back as the 1930's, where resistors were integrated into valves (vacuum tubes). These were used in punch card processing business machines, like the IBM 557, 548 and 514. The valves were use as one-bit memory, like using a flip-flops.

author: EPAIII
author_rank: Super Contributor
timestamp: June 22, 2023, 08:44:56 am
content: Transistors?Transistors??We don't need no stinking transistors, we gotvalves!

author: EPAIII
author_rank: Super Contributor
timestamp: June 22, 2023, 09:00:05 am
content: Did I see surface mounted, ceramic capacitors being soldered with a Weller soldering GUN?OK, they were a bit bigger than today's, but still .....

author: RoGeorge
author_rank: Super Contributor
timestamp: June 22, 2023, 09:57:52 am
content: A soldering gun works great even for the nowadays small sized SMDs. For the smaller ones, wire a piece of thin copper on the otherwise thicker tip of the soldering gun (I use copper thin wire from stripped CAT5 LAN cable leftovers). Let half a cm or so LAN wire in the air, that will become the new soldering tip. For best results, solder under an optical microscope. Works great for casual soldering/desoldering/replacing a SMD component, but not a very productive method for assembling a full PCB.The funny thing is that if you left loose both ends of the thin wire, and bend them apart just the right distance, that can be used like a desoldering tweezers. Or make a small loop with the thin wire, so to heat all pins at once and desolder small SMDs of 3-6 pins.

author: VK3DRB
author_rank: Super Contributor
timestamp: June 22, 2023, 11:43:27 pm
content: Quote from: EPAIII on June 22, 2023, 08:44:56 amNot so funny. The CSIRO wanted funding to develop a new technology called integrated circuits using silicon in the early 1960's. The government denied the funding say the we are the best at valve technology and should stick to what we know. Most politicians rarely had any technical knowledge or vision beyond that of a five year old back then and even today.
Need code-learning photodiode that works in visible range - Page 1
Forum section: electronics / general

author: mirthmuffin
author_rank: Newbie
timestamp: June 20, 2023, 05:22:29 am
content: Vishay makes IR receivers that output the carrier signal. I need a similar unit that works at optical wavelength. Is there anything out there that might do it?TSMP96000 looks like it might have an IR filter I may be able to remove. It seems like maybe I've heard of people doing this. Is there a good way?[Update. VSOP98260 does this but is EOL. Vishay says IR filters on SMP96000 can't be removed without destroying the unit.]

author: Someone
author_rank: Super Contributor
timestamp: June 20, 2023, 07:47:46 am
content: Like a photodiode with preamp?https://www.hamamatsu.com/eu/en/product/optical-sensors/photodiodes/si-photodiodes/S8745-06.html

author: Infraviolet
author_rank: Super Contributor
timestamp: June 20, 2023, 06:06:51 pm
content: What speed of carrier signal? If it is at the 38KHz or so that typical I remotes use then you could build your own op amp based amplifier to go behind a visible wavelength photodiode/phototransistor.Or, you might look it to whether you can get hold of material, in the right form factor, which can fluoresce in IR when excited by optical wavelengths. That sort of stuff exists for turning UV in to visible wavelengths, like on the coverings of tube lights, I'm pretty sure there could be a visible to IR version, but it might be pricey or hard to find. Then you could just turn the visible signal in to IR to feed to a typical remote coontrol style detector.

author: mirthmuffin
author_rank: Newbie
timestamp: June 22, 2023, 08:18:51 pm
content: Not quite. I also need the bandpass filter. I found the VSOP98260, but its's EOL...

author: mirthmuffin
author_rank: Newbie
timestamp: June 22, 2023, 08:20:40 pm
content: Its in 25khz to 60khz...I'm looking for a part that lets me avoid building my own analog RX. Per above, I did find a part but it EOL.
Patient monitor delay - Page 1
Forum section: electronics / general

author: hap2001
author_rank: Regular Contributor
timestamp: June 22, 2023, 01:56:48 pm
content: Hi.I'm not professional, I just played with a few patient monitors by Philips, and all of them have several seconds of delay, from the signal change to the data shown on screen.(I'm not talking about the alarm delay - from the data shown to alarm triggering - I understand that is deliberately done to reduce false alarm.)Do you guys know whether the display delay is on purpose (please explain), or it's a hardware limitation?Any brand/model that do not have such delay?Thanks.

author: Benta
author_rank: Super Contributor
timestamp: June 22, 2023, 08:05:58 pm
content: I don't think it's intended. But there's a heck of a lot of signal processing going on, and even with fast DSPs there'll be some delay.

author: SiliconWizard
author_rank: Super Contributor
timestamp: June 22, 2023, 08:14:44 pm
content: Quote from: hap2001 on June 22, 2023, 01:56:48 pmWhat kind of hardware monitor? I suppose you are talking about the typical ones measuring heart rate, showing a basic "real-time" ECG, blood pressure and O2 Sat?You probably need to consider the time scale of these events to understand why the latency is in the order of seconds. The cardiac & respiratory periods are in the order of a second and you need several periods to make any relevant measurement.
Is this a virus? - Page 1
Forum section: electronics / general

author: vlad777
author_rank: Frequent Contributor
timestamp: June 21, 2023, 05:35:21 pm
content: I have visual studio 2017.Few days ago I noticed Chinese in create new project.Google translates it as " Umbrella Air G: ".I downloaded avast free and it finds no threats, even in targeted scan of the vs directory.Please tell me have you seen this before?Many thanks.

author: ataradov
author_rank: Super Contributor
timestamp: June 21, 2023, 06:07:15 pm
content: Looks more like data corruption. Along with Chinese you have some unrecognized characters and Arabic (?).

author: vlad777
author_rank: Frequent Contributor
timestamp: June 21, 2023, 06:12:46 pm
content: Some viruses look like that just to ruin your day.Change font , icons , ruin your desktop, etc...

author: vlad777
author_rank: Frequent Contributor
timestamp: June 21, 2023, 10:42:22 pm
content: I figured something out.The tree is giving me directories in my visual studio folder.EDIT:OK so it is a *.vstemplate file. Just got to find it.
What component is this? - Page 1
Forum section: electronics / general

author: LeWidget
author_rank: Regular Contributor
timestamp: June 14, 2023, 05:48:30 pm
content: Hi all,Think my last post under 'Beginners' got deleted so riposting here.I'm trying to repair a window wiper motor which seemed to have water damage. I've cleaned it up but one of the three brushes was badly damaged. Looking at it, it seems to be some sort of electrical component. Is anyone able to identify it? I had a Google but no matches.

author: SeanB
author_rank: Super Contributor
timestamp: June 14, 2023, 06:19:37 pm
content: Funny enough met that this week, it is a PTC fuse, there to prevent the motor burning out with overload, by switching to a higher resistance state. Not sure about replacing it, as it is likely only an OEM only part, but you can bridge it out for testing, and replace with a 130C one time thermal fuse later on. Had to make the new brushes fit, using sandpaper to make the new brushes small enough to fit the brush holders, as we could not get any that were an exact fit. 2 hours driving around, and $1 for the new ones....... now all we need to do is find a new window switch cluster, seeing as the old one got fried because of the worn brushes, though it has had somebody in there before, lots of 'rework" wires bodged in on the PCB to replace the thin traces.

author: Infraviolet
author_rank: Super Contributor
timestamp: June 14, 2023, 09:10:57 pm
content: If you measure its size you'll probably be able to find an SMD polyfuse which would fit. A thorough hunt through the datasheets from major polyfuse manufacturers (usually there is one datasheet for a whole series of different size and curent capacity fuses from the same series) might also find the same marking number, which you could check in their tables so you could find what hold and trip currents the blown polyfuse used to be rated for. Then buy any which fits the same size and currents specs.

author: LeWidget
author_rank: Regular Contributor
timestamp: June 21, 2023, 06:23:27 am
content: Sorry for the late reply. Thanks for the feedback, much appreciated. I'll have to keep this in mind for future. The motor was in poor shape so i ended up getting a used replacement motor. I opening it up and took a photo of the fuse, though it seemed to be attached to a contact point at one end, I didn't end up taking it all apart.
What happened to RF cookers? - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: June 15, 2023, 11:35:30 am
content: Parody thread.But really, where did all those 5G nutjobs go?

author: Simon
author_rank: Unknown
timestamp: June 15, 2023, 01:06:36 pm
content: They must have been right....

author: tom66
author_rank: Super Contributor
timestamp: June 15, 2023, 01:10:01 pm
content: They were eliminated by the 5G mafia.

author: BrokenYugo
author_rank: Super Contributor
timestamp: June 15, 2023, 07:39:26 pm
content: I have to imagine the "RF is killing you" conspiracy in general is a bit of a moving target as new stuff comes out to spin BS about, until the targeted tech becomes so commonplace it's hard to argue against. A greater number of people will buy into a fiction if their own reality is not already in disagreement, and now we have a lot of people walking around 5G service areas with 5G phones and they aren't dropping dead or pooing out their internal organs or whatever was/is claimed by the crazies.

author: tszaboo
author_rank: Super Contributor
timestamp: June 15, 2023, 08:28:57 pm
content: I don't know, but I was considering making and selling actual 5G detection gadget with those RF RMS logarithmic converters and RF filters.i kinda missed out on this.

author: Simon
author_rank: Unknown
timestamp: June 15, 2023, 08:54:35 pm
content: never too late to whip up a good frenzy over nothing and make some dosh, happens all the time

author: .RC.
author_rank: Frequent Contributor
timestamp: June 17, 2023, 07:06:47 am
content: Big Clive zapped them with the 400V death ray capacitor.
Sorry, just testing here!! - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 22, 2023, 11:29:10 am
content: Sorry to all. I'm just testing if I can still 'Post' stuff, as my last recent attempt failed...

author: GlennSprigg
author_rank: Super Contributor
timestamp: June 22, 2023, 11:33:51 am
content: Well that seemed to work, so I must be alive!!! hahaha

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: June 22, 2023, 12:05:24 pm
content: Sprigg is back!!

author: Brumby
author_rank: Unknown
timestamp: June 28, 2023, 10:26:58 am
content: Ah. Indeed.
Career Advice for PCB Designer - Page 1
Forum section: electronics / general

author: cjurczak
author_rank: Contributor
timestamp: June 17, 2023, 02:46:26 am
content: I'm 40 year old EE drop out. I have been working in electronics for little over 10 years. Half in an electrical lab, and half doing PCB designer. I was promoted to Sr. PCB Designer after a few years and now my career has seem to have stalled. My question is what should I do to further my career? CID/CID+, IPC training, etc or something else? I also have a side hustle that involves some PCB design work, but I want to be prepared to advance my career. Or am I too old and should just prepare to ride it out where I'm at right now.

author: Psi
author_rank: Super Contributor
timestamp: June 17, 2023, 04:08:36 am
content: Could move into RF PCB stuff.

author: cjurczak
author_rank: Contributor
timestamp: June 17, 2023, 04:25:03 am
content: Any suggestions on getting into RF layout or getting the skills needed?
How Youtubers Built a $150 Million Streaming Platform - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 16, 2023, 12:51:40 am
content: Makes us full time electronics Youtubers look like a bunch of amateur hacks. Guilty as charged, of course.

author: ataradov
author_rank: Super Contributor
timestamp: June 16, 2023, 01:15:17 am
content: I subscribed to Nebula because of the Jet Lag: The Game. The amount of effort required to produce that does not compare to any electronics channel I've seen. I can't say I know of any electronics channels that I would pay money for.Production quality of the content in general there is way better than anything you see on TV.

author: ataradov
author_rank: Super Contributor
timestamp: June 16, 2023, 03:36:33 am
content: Measuring success by the stock market will always give weird results.If a company has enough cash flow to exist and pay salaries, it is a success. Investors being screwed is secondary.

author: ataradov
author_rank: Super Contributor
timestamp: June 16, 2023, 04:26:26 am
content: But it sounds like they are pretty involved with each other and Curiosity Stream owns some part of it, so it is hard to tell whether Nebula on its own would be successful.They are also said to be a YT competitor, but I don't think it is the case. They have carefully selected creators making well produced content. This is not some potato quality videos anyone can upload.

author: EEVblog
author_rank: Unknown
timestamp: June 16, 2023, 05:41:57 am
content: Quote from: ataradov on June 16, 2023, 01:15:17 amAgreed. And all us electronics Youtubers know it. We are lucky to get a thousand or two paying Patrons. AvE has been the only exception to that with at the time he last made his numbers public, IIRC about 12k Patrons.I've thought about doing this with my EEVdiscover channel, but I don't think the audience is there to pay for the expense of it all

author: EEVblog
author_rank: Unknown
timestamp: June 16, 2023, 05:43:44 am
content: Quote from: ataradov on June 16, 2023, 04:26:26 amYes, that's totally not the case. Same the Linus's Floatplane system.I've lost count of the number of people who tell me "why don't you put your content on floatplane"?Because it's a private subscription only service that is in no way a competitor to youtube.

author: thm_w
author_rank: Super Contributor
timestamp: June 16, 2023, 10:05:26 pm
content: Quote from: karpouzi9 on June 16, 2023, 03:26:12 amIts not a direct representation as curiosity stream has a minority share in Nebula right? Its not like Nebula is the IPO. Even if I agree with you.Anyone that has a Nebula sub can see how many views videos get? It won't show me that I can see.https://nebula.tv/videos

author: ataradov
author_rank: Super Contributor
timestamp: June 16, 2023, 10:17:43 pm
content: No, their interface is pretty bare. There are no comments, no view counts, no likes. Just the videos.
Old Japanese Vending Machines - Genius! (StrangeParts video) - Page 1
Forum section: electronics / general

author: tom66
author_rank: Super Contributor
timestamp: June 06, 2023, 07:44:41 pm
content: I love the popcorn machine 7:20 onwards. The use of a consumer microwave, and thentilting the microwaveto get the popcorn out, is strangely genius yet just so over-engineered.

author: VK3DRB
author_rank: Super Contributor
timestamp: June 14, 2023, 10:33:57 am
content: The popcorn machine was really innovative. Yep, better than Disneyland. But there is another requirement before people can just problem solve with such ingenuity... their brains need to be wired that way. Not anyone can do it and a lot of it comes from a person's upbringing from the time a person was an infant. It cannot just be learnt from textbooks. From what I have observed, those brought up in a house with servants, become next to useless engineers. But I have known some engineers brought up on farms to become outstanding engineers.

author: BradC
author_rank: Super Contributor
timestamp: June 14, 2023, 12:23:55 pm
content: All I can say is "that was awesome". Thanks!

author: PlainName
author_rank: Super Contributor
timestamp: June 17, 2023, 02:59:24 pm
content: Many years ago I recall going to a campsite in Cornwall (UK for foreigners) where they have a chip (fries) vending machine. Shove in the money and a portion of potato chips would be dunked in hot oil then wend they way via a salt shaker to the delivery point of a cardboard container. I think it was there for at least 2 years and I don't remember it ever being out of action (we would stay there for 4 weeks at a time).