hybridfree/eevblog-posts huggingface dataset:
Auto supply chain crisis sparks end for British EV charging group - Page 1
Forum section: electronics / general

author: Black Phoenix
author_rank: Super Contributor
timestamp: October 15, 2022, 04:16:25 am
content: https://news.sky.com/story/auto-supply-chain-crisis-sparks-end-for-british-ev-charging-group-12718618I've just made this week an Instalation of one of this charging points in a neighbour...Well constructed but too expensive for the function when there are good alternatives for cheap, being the Zappi the biggest one.At least I'm just the installer, not the supplier of the equipment, so product warranty is not with me.

author: Zeyneb
author_rank: Regular Contributor
timestamp: October 15, 2022, 08:03:58 am
content: Are parts of the charging points not available, or is it the lack of new Electric Vehicles that ruined their sales?

author: Towger
author_rank: Super Contributor
timestamp: October 15, 2022, 08:20:29 am
content: Looks like the 'Supply Chain' is the excuse. I take it their business model was installing their own model of charger, rather than just installing EV chargers.

author: Black Phoenix
author_rank: Super Contributor
timestamp: October 15, 2022, 09:53:46 am
content: Quote from: Towger on October 15, 2022, 08:20:29 amOf course they are the manufacturer of their own charger, Andersen A2. They are not a EV installer. Same as Myenergi with the Zappi EV Charger (Dave have one).

author: eti
author_rank: Super Contributor
timestamp: October 17, 2022, 06:36:45 pm
content: They're only EVs; it's hardly a crisis.

author: tom66
author_rank: Super Contributor
timestamp: October 17, 2022, 08:14:04 pm
content: I've always found the cost of EVSEs to be ridiculous anyway. It's why when I moved house I took my one with me rather than leaving it on the wall; a new "basic model" is nigh over £360 ex VAT  for what is essentially a 32-amp double pole contactor, DC compliant RCBO, and controller board, in a weather-resistant casing. Where is the money going? It feels like it should be around half of that. Is the volume just not high enough yet or is there some other cost that's not obvious?https://www.cef.co.uk/catalogue/products/4863883-7-3kw-ac-wall-charger-with-32a-type-2-socket

author: Black Phoenix
author_rank: Super Contributor
timestamp: October 27, 2022, 01:17:42 am
content: Update -https://andersen-ev.com/acquisition/Looks like it was bought by another company founded this year.Old customers warranty claims and access to the app was guaranteed.Nothing said about the old employees keeping their jobs on the new company.
ISO datsheet for Old Motorola IC  - Page 1
Forum section: electronics / general

author: creamyspuppet
author_rank: Newbie
timestamp: October 19, 2022, 04:04:44 pm
content: I'm currently seeking a data sheet for a very old IC made by Motorola.It's an 8152 chip p/n C010444D-05, the application is a TIA (Television Interface Adapter) for an Atari 2600A (4-switch with wood panel).It would have been produced somewhere between the late 1970's and mid 1980's.Attached is an image of the chip.

author: tooki
author_rank: Super Contributor
timestamp: October 19, 2022, 06:56:07 pm
content: 8152 is the date code (52nd week of 1981).You’re not going to find a regular datasheet for it because it’s a custom Atari part. Motorola happens to have manufactured it for them, but the design was Atari’s, and they were manufactured by numerous chip makers.That chip, the TIA, is the “secret sauce” that makes a 2600 what it is.Seehttps://www.ataricompendium.com/faq/vcs_tia/vcs_tia.htmlHowever, I did find this:https://archive.org/details/Atari_2600_TIA_Technical_Manual
My hobby projects sponsored by people - Page 1
Forum section: electronics / general

author: strawberry
author_rank: Super Contributor
timestamp: October 19, 2022, 05:06:18 pm
content: some "restoration" projects of some vintage amplifiershttps://boot.ritakafija.lv/forums/index.php?/topic/180444-restauracija-radiotehnika-7111-101-odisej-002-001-sakta/
Archiving content locally - Page 1
Forum section: electronics / general

author: PaulAm
author_rank: Frequent Contributor
timestamp: October 17, 2022, 06:25:57 pm
content: Once in a while it seems like it would be useful to have a local copy of a particularly interesting thread. The Tek2465b, and Keithley 2001 among others come to mind.Does anyone have any useful tools that would do that (eg, make local copies of text, attachments, photo, etc and keep the structure intact) ? I don't want to copy the entire forum, just a specific thread and package it nicely in it's own directory

author: MegaVolt
author_rank: Frequent Contributor
timestamp: October 18, 2022, 09:48:50 am
content: Quote from: PaulAm on October 17, 2022, 06:25:57 pmI save as PDF.Modern browsers allow you to save the theme as a PDF. You need to open all pages on one sheet and then save everything as PDF.If you want to download, then there is software that allows you to do this. For example TeleportPro...

author: rdl
author_rank: Super Contributor
timestamp: October 18, 2022, 12:42:30 pm
content: There's File > Save page as... (and choose "web page, complete)Which works okay for simpler things. Just put it all in its own folder.

author: PaulAm
author_rank: Frequent Contributor
timestamp: October 18, 2022, 12:54:11 pm
content: But not so much for something that has 10 or 20 or more pages, with attachments.

author: Ian.M
author_rank: Super Contributor
timestamp: October 18, 2022, 03:43:17 pm
content: Very careful use ofWGET, from the topic's base URL and with limited recursion depth and access rate could capture a thread to a folder tree full of HTML and other files. However if you get its parameters wrong, WGET will happily try to download the whole forum and maybe the rest of the internet, which will get your IP address and any associated user names banned by our admins.

author: eti
author_rank: Super Contributor
timestamp: October 19, 2022, 07:39:46 am
content: Quote from: PaulAm on October 17, 2022, 06:25:57 pmTry this:https://www.httrack.com/I'm sure I've used it once or twice. Also you can use archive.org.and take a snapshot of the thread URL. It doesn't matter whether it's deleted AFTER archive .org takes the snapshot, as it will remain archived indefinitely.Hope it helps you.

author: eti
author_rank: Super Contributor
timestamp: October 19, 2022, 07:41:22 am
content: Quote from: rdl on October 18, 2022, 12:42:30 pmA very primitive and rudimentary way. It works for some pages, but not all.

author: PaulAm
author_rank: Frequent Contributor
timestamp: October 19, 2022, 02:24:31 pm
content: httrack looks promising, I'll have to spend a little time into figuring out the right set of filters. If I come up with something that works well, I'll post it here.

author: RoGeorge
author_rank: Super Contributor
timestamp: October 19, 2022, 03:04:49 pm
content: There is a plugin calledSingleFile, for Firefox. Can save a webpage html+pics. Attachments have to be downloaded manually.
3D ad at the bottom of the forum pages - Page 1
Forum section: electronics / general

author: Bud
author_rank: Super Contributor
timestamp: October 18, 2022, 08:59:52 pm
content: That blury vendor's ad at the bottom of this page turned out to be an actual red/blue 3D picture. I was looking through my junk the other day and found a pair of red/blue 3D glasses, tried them on the ad and the center of the ad popped right out.Why would anyone want to make such ads in 2022 is one's guess.

author: alm
author_rank: Super Contributor
timestamp: October 18, 2022, 09:53:10 pm
content: Do you mean this ad? Yes, it seems it was a couple of decades late. Would have been really cool in the eighties...

author: niconiconi
author_rank: Frequent Contributor
timestamp: October 18, 2022, 09:55:01 pm
content: Quote from: Bud on October 18, 2022, 08:59:52 pmNerd-sniping. The fact that we're reading this very thread means the ad is working.

author: EEVblog
author_rank: Unknown
timestamp: October 18, 2022, 10:09:19 pm
content: You'll be pleased to know that their ad run is finished, forgot to remove it this month.

author: Halcyon
author_rank: Unknown
timestamp: October 18, 2022, 10:31:00 pm
content: Quote from: niconiconi on October 18, 2022, 09:55:01 pmNo different to having a QR code or some cryptic address. It's designed to reach and engage a specific audience. As you said, it worked!

author: Bud
author_rank: Super Contributor
timestamp: October 18, 2022, 10:50:34 pm
content: Nope, it did not work, because less than 24hrs later i can't remember what it was about.

author: eti
author_rank: Super Contributor
timestamp: October 19, 2022, 07:24:58 am
content: Quote from: alm on October 18, 2022, 09:53:10 pmWell I think it's really cool NOW. It shows a capability to think of something different, that doesn't involve the usual. Props to them for sending something out that the 2% of intelligent people (like the OP) will pick up on, and appreciate.
Wipe Off the Battery Before Use? - Page 1
Forum section: electronics / general

author: Boris_yo
author_rank: Frequent Contributor
timestamp: October 18, 2022, 04:59:47 pm
content: Hi. What is the purpose for wiping off the lithium cell battery before using it?I found it mentioned on a few websites.

author: ataradov
author_rank: Super Contributor
timestamp: October 18, 2022, 05:26:01 pm
content: I would assume they don't want the finger grease and sweat to cause oxidation and poor contact over time.

author: pcprogrammer
author_rank: Super Contributor
timestamp: October 18, 2022, 06:56:46 pm
content: And to not create a restive bridge between the two poles, which shortens the battery life. Best to touch these batteries as little as possible.I usually try to leave it in the plastic and slip it into place without touching it at all.

author: james_s
author_rank: Super Contributor
timestamp: October 18, 2022, 08:42:50 pm
content: It's the latter. Finger oils contain salts and these combined with moisture forms a slightly conductive film. It's not much, but when spread over the multiple years these small cells can last it doesn't take much leakage current to significantly reduce the lifespan.

author: Boris_yo
author_rank: Frequent Contributor
timestamp: October 19, 2022, 12:44:50 am
content: This is only relevant to CR2032 and similar sized lithium cell type batteries? What about small sized batteries like LR44 and AG3? And lithium/alkaline AAs/AAAs? 9v rectangular battery?

author: ataradov
author_rank: Super Contributor
timestamp: October 19, 2022, 12:50:21 am
content: It is relevant for all types of batteries, but it has most impact on small batteries that don't have a lot of capacity to begin with. Discharging even AAA battery though dirt and grime traces would take a while and self discharge would likely to be higher anyway.

author: Halcyon
author_rank: Unknown
timestamp: October 19, 2022, 03:25:05 am
content: I was always taught to give contacts and button cells a clean with alcohol when replacing them. So I've always done it that way. I mean, if for no other reason that it's nice and clean.
How to sort forum view on date topic created? - Page 1
Forum section: electronics / general

author: Dave Lowther
author_rank: Newbie
timestamp: October 18, 2022, 09:52:58 am
content: Hi,I'm new here and couldn't see a better place to post questions about how to use the forums.I browse once per day and then mark everything as read.I'd like to be able to see completely new topics rather than topics with new posts.The view has a column "Last post" showing the date of the most recent post. Is there any way to change it to "First post" so that I could see, from the date/time, whether it's a new topic since the last time I set to 'mark read'?TIA
How to search threads on EEVBLOG? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: October 16, 2022, 11:53:23 am
content: Hi,Am trying to locate EEVBLOG threads concerning LLC converters.Over the last few years, there have been loads of these but googling"EEVBLOG forum LLC" reveals only two such threads.Do you know how to search such things.{EDIT_____....Ian.M in your #2 below...you are a superb genius!!!, i cant believe the years ive been going without what you just kindly advised ___END OF EDIT}

author: Ian.M
author_rank: Super Contributor
timestamp: October 16, 2022, 11:58:45 am
content: Google site search:site:eevblog.com/forum LLCSwap out theLLCin the Google search box for any other search terms you want to use, keeping thesite:...

author: tooki
author_rank: Super Contributor
timestamp: October 16, 2022, 08:16:21 pm
content: The other Google keyword I use all the time isfiletype:pdfOf course you can search for other file types, but 99.9% of the time it’s that I want a PDF.And note that thesite:keyword can be any part of the URL: I usesite:.chall the time to restrict to Swiss websites, for example.

author: MikeK
author_rank: Super Contributor
timestamp: October 16, 2022, 09:13:57 pm
content: EEVblog is an exception, in my experience. The search function works quite well. There have been several instances where I got better results using the forum search over using the Googler with "site:xxx".

author: tooki
author_rank: Super Contributor
timestamp: October 17, 2022, 07:33:24 am
content: Agreed. In my experience, the forum’s own search is great when I know exactly the search terms I need. Google site search is often better at fuzzy searches.
Dick Smith catalogue from 83/84.  - Page 1
Forum section: electronics / general

author: hamster_nz
author_rank: Super Contributor
timestamp: October 18, 2022, 07:07:46 am
content: Just stumbled over this Dick Smith 1983/84 catalogue - thought others in AUS/NZ might find it interesting to see what hobbyists could get in 1984... Even a 6.5MHz scope! Wow!https://ia903107.us.archive.org/9/items/dick-smith-nz-enthusiasts-catalogue-1983-84_202106/Dick%20Smith%20NZ%20Enthusiasts%20Catalogue%201983-84.pdfInteresting what things have changed price and what haven't, allowing for $1.00 in 1984 is about $3.80 today..

author: Electroplated
author_rank: Regular Contributor
timestamp: October 18, 2022, 08:57:14 pm
content: Never seen one of these catalogues before so it was interesting reading through it, thank you for posting it !Nearest we had in the UK was I think the Maplins catalogue, it was also full of useful data, pinouts and references, long gone now though.Seeing the pinouts in this catalogue did make me wonder if I am the only one who has them printed out and pinned to a board for reference, yeah you pull them up on a PC or phone these days but nothing beats thumbing through paper books and note books--

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: October 18, 2022, 09:42:31 pm
content: The 16kb memory upgrade to take it to 24kb! $149 (page 3)Maybe this is what I need to get, something like this for my phone it's always saying out of memory.

author: aeberbach
author_rank: Regular Contributor
timestamp: October 18, 2022, 10:10:23 pm
content: My grandparents moved house around that time and I collected all the scrap metal he had collected from under his house and sold it - maybe got $75? Bought my first soldering iron and a bunch of stuff after staring at that catalog for many hours, went to the Bridge Road store in Melbourne.

author: Brumby
author_rank: Unknown
timestamp: October 19, 2022, 12:31:04 am
content: I must have a look at my collection of catalogues (real dead tree stuff). I have a few around that era ... Dick Smith, Tandy, Jaycar and Altronics, I think. Not sure what else.I also remember doing mail order to the USA for 7400 series TTL way back when...My, how the world has changed.
program pic10f202 sot23-6 with a tl866ii plus - Page 1
Forum section: electronics / general

author: oggie
author_rank: Contributor
timestamp: October 15, 2022, 10:07:31 pm
content: anyone know how I might program this pic chip with my tl866? It supports the chip in dip8 package. And it also is able to program it in ICSP mode.Is my best bet to build some sort of jig with the ICSP cable and program it that way?

author: jpanhalt
author_rank: Super Contributor
timestamp: October 15, 2022, 10:35:29 pm
content: How many do you need to program? For just one, get an SOT23-6 breakout board and do as you suggest. You might also be able to use micro-grabbers. You need to keep the leads short (6" or so).If you are doing a lot of them, then there are "burn in" sockets. I use the 3M Textool versions. There are cheaper Chinese versions.

author: oggie
author_rank: Contributor
timestamp: October 16, 2022, 10:01:01 pm
content: I'm only doing 5-10 this go around. If there's enough demand, I might do more down the road.

author: jpanhalt
author_rank: Super Contributor
timestamp: October 16, 2022, 11:52:40 pm
content: If it were me, I'd get a burn-in socket. Can't find the 3M version, but eBay has versions from China for about $18 including shipping. My patience for soldering leads to an SOT23 would wear very thin after just 2 or 3. I have used my SOIC8 socket more than I thought I would.
Analog vs Digital Cable Quality Issues - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: October 20, 2022, 11:40:53 pm
content: about the cables used in home theatre systems /home gaming setups.should we forget about analog speaker cable myths and concentrate more so on digital cables,as related to the frequency response range of USB cables.I have discovered that digital cable quality does affect performance in a dramatic way.voltage drops and maximum data rates.be interested to know if this is an issue.

author: eti
author_rank: Super Contributor
timestamp: October 21, 2022, 01:18:07 am
content: Prepare yourself... onslaught incoming...

author: james_s
author_rank: Super Contributor
timestamp: October 21, 2022, 01:34:42 am
content: Just use decent quality cables that feel well made. Avoid anything that is ridiculously cheap or ridiculously expensive, or that has lofty claims and testimonials. I've never had any trouble with ordinary middle of the road cables, the only time I have had issues was with extremely cheap flimsy ones.

author: jonpaul
author_rank: Super Contributor
timestamp: October 21, 2022, 05:05:24 am
content: See Belden Cable, Blogs of Steve LAMPENSpecifically adresses these issues for professional, cinema, broadcast.https://www.belden.com/blogs#sort=%40contentpublisheddate%20descending&f:fauthor=[Steve%20Lampen]Jon

author: tggzzz
author_rank: Super Contributor
timestamp: October 21, 2022, 10:55:46 am
content: Quote from: jonovid on October 20, 2022, 11:40:53 pmThe so-called digital cables are just as analogue as the cables used to transmit digital signals round the world in the 19th century. Unless you are involved in femto-amp electronics or photon-counting electronics, the electronics are analogue. Other so-called digital electronics are merely analogue electronics whichinterpretthe analoguewaveformsas digitalsignals.Once that is understood the strategy is obvious: ensure that there is goodsignal integrityin the waveforms received at the destination. You won't have to be concerned about processing the digital signals, since that is out of your control.Thus ignore any marketing label on the cables, and select high quality cables with the right impedance (to avoid reflections and pattern sensitive distortions) and a low loss (to ensure the best received signal-to-noise ratio) and decent screening (to avoid introducing noise/ interference)

author: newbrain
author_rank: Super Contributor
timestamp: October 21, 2022, 11:37:26 am
content: Quote from: jonovid on October 20, 2022, 11:40:53 pmJust keep your eyes open and you'll be fine.
Trimmer cap question - Page 1
Forum section: electronics / general

author: antenna
author_rank: Frequent Contributor
timestamp: October 16, 2022, 07:34:54 pm
content: I am just starting to get into RF oscillators and wanted to buy some trimmer caps. The only ones that appear to be priced for experimentation are the PP film types like this onehttps://www.mouser.com/datasheet/2/427/bfc2808_5mm-1762950.pdfbut the datasheet says the neitherthe electrical or physical characteristics are guaranteed after just 10 rotations. Is the rotational life of these really that bad or can they typically go many more turns and be ok?Also, If anyone knows a good source of cheaper trimmers that work ok at HF/VHF, I would appreciate recommendations. I would like to have on hand a dozen or so each of three different ranges. Maybe 1-10pF, 4-20pF and 40-120pF or something close.Thanks!

author: Geoff-AU
author_rank: Frequent Contributor
timestamp: October 17, 2022, 03:04:52 am
content: Look for a local version of something like this (the style of tuning cap used in crystal sets and basic RF discovery kits)https://www.jaycar.com.au/60-160pf-miniature-tuning-capacitor/p/RV5728?pos=1&queryId=e8c6afe515512269e70f33f7b5b6684bDS says 10,000 rotations

author: aayushkm52
author_rank: Newbie
timestamp: October 17, 2022, 03:55:53 pm
content: Capacitors have an adjustment range of less than 360° whereas inductors have cores which can be rotated over several turns, making them easier to adjust precisely.To add, in relation to your question, the range would mean a certain movement would have more effect on a capacitor than an inductor. The sliding plates of capacitors would I guess be more susceptible to movement but how much would depend on the construction.Once they're adjusted, you can put a blob of cement on to annoy the person who has to repair it.router loginpicashow

author: TimFox
author_rank: Super Contributor
timestamp: October 17, 2022, 04:14:41 pm
content: Piston trimmer capacitors, with a lead screw, are easier to adjust than 180orotation units.They are somewhat expensive, however.They also can have extremely low loss and parasitics.New prices can outrageous, but there are some reasonable surplus sources, e.g.https://www.surplussales.com/Variables/PistonTrimmers/index.html

author: jonpaul
author_rank: Super Contributor
timestamp: October 17, 2022, 08:02:08 pm
content: Tektronix scopes and plug-ins used the 180 deg trim caps, single disc céramique are quite stable but the thin metalized ceramic rotors easily break after decades.The modern multi layers plastic dielectric are often junk quality from China, thus the low number of rotation99% of trim caps are set once and forget.Finally the normal variable capacitors used in RX, TX and old radio use last foreverJon

author: BrokenYugo
author_rank: Super Contributor
timestamp: October 17, 2022, 08:09:05 pm
content: If you dig around ebay and can live with the size, surplus air variable capacitors in trimmer sizes (a couple dozen pf, give or take) can be had at reasonable rates.
Post a picture of your Network Setup - Page 1
Forum section: electronics / general

author: MarginallyStable
author_rank: Regular Contributor
timestamp: October 12, 2022, 07:10:20 pm
content: I found the fuse box pictures interesting... So lets show off some networking!

author: jmelson
author_rank: Super Contributor
timestamp: October 12, 2022, 11:15:14 pm
content: Well, I'm not sure how to do a "photo", as everything is distributed all over. I have a cable modem, that feeds a Dell Optiplex as my web server, mail server, ftp, firewall, etc. That feeds a 10/100/1000 24 port switch. That feeds all the other computers, and also feeds an 8 port POE switch that connects to an intel Atom computer that runs Asterisk, and the POE switch powers 4 Snom voip phones. I have a real POTS analog residential line and a Charter business cable modem line that feeds an analog line over to the telephony card in the Atom. I also have about a dozen other computers that are attached to various gear around the shop, through the 24 port switch.Jon

author: PlainName
author_rank: Super Contributor
timestamp: October 14, 2022, 12:04:02 am
content: Middle part of the setup. There are 'distributed populations' elsewhere serviced by local switches.The sticky out bits are torches. Seem to have a fetish for those (cheaper than test kit, mostly) and a metallic rack is an ideal place to let their magnets stick (there are more down the sides). The excuse is that they will be useful during a power cut, but it would take the length of time the UPS can hold things up to choose which one would be most appropriate.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: October 14, 2022, 04:23:43 am
content: Quote from: MarginallyStable on October 12, 2022, 07:10:20 pmOh boy. This is going to get messy.I would never trust a man who keeps a tidy network cabinet.

author: Black Phoenix
author_rank: Super Contributor
timestamp: October 14, 2022, 06:42:36 am
content: Quote from: Ed.Kloonk on October 14, 2022, 04:23:43 amThank you for the kind words. Yes the hat fits me, in all companies where I worked I reworked their network cabinets to a proper all labeled, well routed cables with proper identification instead of the rat's nest it was when I arrived, out of my own time on the weekend.It saved me a lot of time during the week when deploying new equipment and troubleshooting time during events.
Is anyone willing to donate me a oscilloscope(analog CROs) - Page 1
Forum section: electronics / general

author: Sarvesaa
author_rank: Contributor
timestamp: September 21, 2022, 04:58:18 am
content: Dear Friends,I am Sarvesaa, an 17 year old electronic hobbyist and I joined college to get Electrical and electronics engineering degree.I am setting up a lab for me. I got a DMM, DIY Power Supply, and many miscellaneous things. To complete my setup I am looking for oscilloscope and a function generator.But sadly I cannot afford the expensive modern test gear, I am very interested in old HP and Tektronix equipments. I am looking for donations from you guys.Thank youRegardsSarvesaa Jaganathan

author: EEVblog
author_rank: Unknown
timestamp: October 12, 2022, 09:32:46 am
content: FYI forum, a donated a meter to Sarvesaa a couple of years back, so he's legit.The problem is shipping costs for scopes, especially older heavier ones is usually more expensive than what you could get one for locally.

author: tom66
author_rank: Super Contributor
timestamp: October 12, 2022, 09:46:09 am
content: Shipping an oscilloscope to India will be expensive and fraught with danger (for the oscilloscope) I suspect - have you considered asking around universities, high schools, and so on to see if they have any surplus equipment they are scrapping?For a signal generator, I would suggest something like this:https://www.ebay.co.uk/itm/155151440933They are very basic, but a good start.Good luck with your search.edit: remove eBay tracking stuff
Fakes from China..... that actually *work*? - Page 1
Forum section: electronics / general

author: prosper
author_rank: Regular Contributor
timestamp: October 13, 2022, 07:11:14 pm
content: I bought a strip of 'LMV358's from China. Naturally, there was always a good probability that they'd be fake, given that they were like $0.08 each.I hooked one up to a function generator and a scope, and to my surprise, they actually act like 'real' LMV358's.Now, I'm quite sure they're fake for two reasons:1. The 'TI' markings wipe right off2. It performs better than the TI datasheet indicates. TI lists the common-mode input range as spanning up to about 0.6V below Vdd, and these guys happily go right up to the rail.Other specs, like slew rate, output range, offset, etc - are all in the right ballpark or a bit better than 'typical' values. I know there are differences in LMV358's - e.g. ST and ONsemi datasheets claim that their products are rail-to-rail input and output (unlike TI). So, did I just get a 'rebadged' Chinese generic LMV358? Or do genuine TI parts actually work better than advertised?Are there any other fakes that you've found that are actually kinda.... good?

author: Bud
author_rank: Super Contributor
timestamp: October 13, 2022, 10:33:41 pm
content: I once encountered counterfeit Coilcraft RF transformers that electrically worked better than the originals by not having a parasitic resonance at a certain frequency. But the physical construction was considerably worse. I think that was just by chance.

author: prosper
author_rank: Regular Contributor
timestamp: October 14, 2022, 03:10:47 am
content: Yeah, I'm thinking I just got lucky. Who knows what I'd get and how another order would perform. However, I'm happy to have a good supply of really useful opamps in my stash.... But i certainly wouldn't design an actual product with these, with the uncertainty around what they actually ARE, and whether I could get more like them

author: Geoff-AU
author_rank: Frequent Contributor
timestamp: October 14, 2022, 03:33:45 am
content: The problem with counterfeits is you don't always know which corners have been cut. For example, the LM2956 modules that are ubiquitous oscillate at the wrong frequency and have no thermal or overload protection. So do they work when you use them as the average punter would? Sure! But it doesn't mean the counterfeit is any good.I would expect that genuine chips work better than the datasheet suggests. The datasheet is a guaranteed minimum performance level.OTOH, if your designrequiresthe chips to work better than the datasheet suggests (and based on your limited testing of a few specific samples) you are setting yourself up for failure.
W. Marshall Leach's Superposition technique for dependent sources - Page 1
Forum section: electronics / general

author: ledtester
author_rank: Super Contributor
timestamp: October 03, 2022, 09:31:37 pm
content: I just ran across this series of videos which shows a technique developed by W. Marshall Leach to analyze circuits with dependent sources without having to perform source transformations:https://www.youtube.com/playlist?list=PLOunECWxELQQZROtya37L3EkisfVlgqy7The paper describing the technique in full is available on W. Marshall Leach's web page at Georgia Tech:https://leachlegacy.ece.gatech.edu/Paper link:https://leachlegacy.ece.gatech.edu/papers/superpos.pdfThe background history the paper is just as intriguing as the technique... from the web site:Quote

author: ledtester
author_rank: Super Contributor
timestamp: October 12, 2022, 06:36:10 pm
content: An update...W. Marshall Leach's paper was first presented to journals in 1994 but ultimately was never accepted. It remained available only on the Internet. However, in 2011 a response to it was published in the International Journal of Electronics by Robert I. Damper:Can dependent sources be suppressed in electrical circuit theory?https://eprints.soton.ac.uk/271202/1/superposition.pdfIt affirms the conclusions of Leach's reasoning providing perhaps a slightly more robust proof of the technique.
NASA space taxi and maneuvering work platform mockup film by LTV - Page 1
Forum section: electronics / general

author: AlbertL
author_rank: Regular Contributor
timestamp: October 11, 2022, 08:43:11 pm
content: This wonderful low-budget production from the 1960s is a little different from the typical Apollo-era space program film, with a special charm all its own - some of it due to the music which isn't typical for this type of film:
How are Intellectual Properties managed at larger companies? - Page 1
Forum section: electronics / general

author: dastructhm
author_rank: Contributor
timestamp: October 09, 2022, 03:01:02 am
content: I never really understood how it works. Like, how are thesource codeof Windows managed, kept at Microsoft. There gotta be someone who has the power to viewallthe code, right?Likewise, how are the assembly source code(Instruction Set) of micrcontrollers/CPU managed by the management at ST or Intel? What about their hardware/transisitor designs? Who manage all that? A group of people?

author: ataradov
author_rank: Super Contributor
timestamp: October 09, 2022, 03:23:35 am
content: Generally those huge projects are spread over multiple repositories and not everyone has access to everything. Nobody builds the whole thing on their PC, it is all build by build servers, so there is no need for everyone to have access to everything. And even then, Windows code leaked multiple times.Same stuff with hardware designs.And then there is no real value in stealing any of this. The chances of it being useful outside of their integration systems are very low, and the risk of being caught and prosecuted is pretty high.A team of engineers that can use Intel's code would be able to recreate it based on the published documentation. But releasing a product based on this without a licence would get you sued.

author: gbaddeley
author_rank: Regular Contributor
timestamp: October 11, 2022, 07:49:30 am
content: All corporate source code that I have seen has statements like property of … confidential … company secret … licensed materials … restricted … copyright. Employees sign NDA’s. Legal teams. It’s very serious.
Underated EE YouTubers? - Page 1
Forum section: electronics / general

author: dastructhm
author_rank: Contributor
timestamp: October 10, 2022, 12:50:42 am
content: Please forgive me if you believe I'm soliciting someone's channel. (I ain't.)But I digressed. Now, the chit chat:MicroType Engineeringits contents are so practical, yet with a solid understanding on EE.
Where can I buy heavy-duty copper spade terminals? - Page 1
Forum section: electronics / general

author: duckduck
author_rank: Frequent Contributor
timestamp: October 07, 2022, 07:11:41 pm
content: Where do I find heavy duty (1mm+ thick) copper spade terminals for larger wire (say 6 or 8 AWG)? I can find ring terminals all day, but large spade terminals are not made? I can't believe it.EDIT:I'm looking for crimp-style connectors, not "audiophile screw-tight" style.

author: floobydust
author_rank: Super Contributor
timestamp: October 07, 2022, 07:20:37 pm
content: Spade terminals suck above around 15-20A because they have such little contact area. They just grab the spade at the two edges and have relatively high resistance.

author: duckduck
author_rank: Frequent Contributor
timestamp: October 07, 2022, 07:27:57 pm
content: Fair enough. I'm looking to move 25-35 A at 12-14 V. Maybe I need to modify the devices I'm connecting. Thanks.
RIP Gary Johnston - Jaycar Founder - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: March 11, 2021, 11:30:37 am
content: RIP gary, he was only 71.Always wanted to interview him, should have taken the chancehttps://www.smh.com.au/national/jaycar-founder-gary-johnston-dies-after-a-short-illness-20210311-p579x3.html

author: EEVblog
author_rank: Unknown
timestamp: March 11, 2021, 10:17:01 pm
content: Here is Karl's interview with him:

author: VK3DRB
author_rank: Super Contributor
timestamp: March 11, 2021, 10:41:15 pm
content: According to the news article he was only diagnosed with mesothelioma two weeks ago. Now, that is a short illness.I have been exposed to asbestos a few times in my electronics career. The most dangerous was at Siemens in Richmond, Melbourne where the asbestos fibre was literally falling from the ceiling onto office workers.

author: julian1
author_rank: Frequent Contributor
timestamp: March 11, 2021, 11:36:56 pm
content: Great interview. He is incredibly generous with his insights on the factors that contribute to his business success.The stories about parts scavenging, first discovering radio are great too.

author: Brumby
author_rank: Unknown
timestamp: March 12, 2021, 12:44:36 am
content: I heard of his passing on the news last night. I was stunned.

author: wilfred
author_rank: Super Contributor
timestamp: March 12, 2021, 01:10:03 am
content: Quote from: EEVblog on March 11, 2021, 11:30:37 amDon't forget about Jim Rowe. He's not getting any younger.

author: rob.manderson
author_rank: Regular Contributor
timestamp: March 12, 2021, 01:10:53 am
content: Sad news. I haven't had much to do with Jaycar for the last 20 years (living in the US will do that to you) but back in the 80's and 90's he was a good competitor to Dick Smith.

author: rob.manderson
author_rank: Regular Contributor
timestamp: March 12, 2021, 01:12:26 am
content: Quote from: wilfred on March 12, 2021, 01:10:03 amYeah, I'd love to see an interview with Jamieson Rowe. He started at RTV&H in what, 1960? The changes he's seen over the decades. EDUC-8.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: March 12, 2021, 01:17:46 am
content: Thanks for giving us JayCar, Gary.

author: Homer J Simpson
author_rank: Super Contributor
timestamp: March 12, 2021, 04:14:39 am
content: Quote from: EEVblog on March 11, 2021, 10:17:01 pmThat's a very powerful interview, almost inspirational in a way.Philosophy and principles that can be applied to a lot more than just the electronics business.Not to mention a good history lesson.-K

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: October 06, 2022, 07:50:24 am
content: edit: formatted bad. Sorry.Quote

author: SmallCog
author_rank: Frequent Contributor
timestamp: October 06, 2022, 08:50:43 pm
content: What a pity, I grew up as a kid visiting Jaycar with my dad it's what got me (and my brother) into electronics.The stores he built surely inspired many people to make/fix thingsI hope Jaycar survives Chris Wilesmith (I'm not a fan of his)
The meaning of life: PLASTIC - Page 1
Forum section: electronics / general

author: pcprogrammer
author_rank: Super Contributor
timestamp: October 03, 2022, 05:38:13 am
content: It is an oldie but in a way timeless. 8 minutes food for thought or just fun

author: jonpaul
author_rank: Super Contributor
timestamp: October 03, 2022, 06:56:34 am
content: "I want to say one word to you, Benjamin.......just one wordPlastics!"Mr Braddock, spoken to Benjamin, (Dustin Hoffman) in 1967 film The Graduate, with Ann Bancroft.https://www.imdb.com/title/tt0061722/?ref_=tt_chEnjoy,Jon

author: MikeK
author_rank: Super Contributor
timestamp: October 03, 2022, 12:15:20 pm
content: Carlin wasn't a scientist. So I don't trust his opinion on scientific things. It's humor.

author: tom66
author_rank: Super Contributor
timestamp: October 03, 2022, 12:29:33 pm
content: Calling environmentalists "narrow, unenlightened and self-interested" is an odd take, for sure. But I should get out of here before this thread goes off on one of those political tailspins that so many of them seem to achieve.

author: pcprogrammer
author_rank: Super Contributor
timestamp: October 03, 2022, 01:10:57 pm
content: Yeah he is not for the faint heartedMy brother named him when the meaning of life was mentioned by me as something "discussed" here on the forum. You know, this one:https://www.eevblog.com/forum/chat/can-i-ask-a-question-about-our-universe/I found it amusing, but he does have a valid point that the planet will survive long after we are gone, unless we blow it to bits and pieces with some big nuclear bomb or a massive meteorite comes along and does it of course.
Registering for chinese forums from abroad? - Page 1
Forum section: electronics / general

author: Echo88
author_rank: Frequent Contributor
timestamp: September 30, 2022, 12:30:24 pm
content: Chinese forums such ashttp://bbs.38hot.nethave quite a wealth of information and in my case they do a lot of interesting voltnut-projects that are of great interest to me.But it apparently isnt possible to register to them (tried it, one doesnt get an activation link per mail) to view the pictures in threads.Does anyone know a method how to register/get access to the pictures non the less?

author: Jackster
author_rank: Frequent Contributor
timestamp: September 30, 2022, 01:32:24 pm
content: Signup for qq.com (probably have to do it via the app) and then use your QQ.com email or use their SSO to signup.Personally would do this on a spare phone with no personal info on it or your personal phone number.. It is Tencent after all

author: thm_w
author_rank: Super Contributor
timestamp: September 30, 2022, 08:47:22 pm
content: I tried gmail + mailinator sign up, no email yet.When you even enter your email "gmail.com" pops up on the list. So you wouldn't think its a banned domain?There is a 31 page thread on Metcal handle teardown...Will try the QQ sign up later on a spare phone.edit: couldnt sign up for QQ, said my phone number was suspicious. I think all of NA is blocked from registering for it.
Rivian 7777 battery pack not very serviceable! (2170 cell's) - Page 1
Forum section: electronics / general

author: MT
author_rank: Super Contributor
timestamp: September 27, 2022, 03:48:11 pm
content: His recycling claims of 92% is a happy number as usually.

author: thm_w
author_rank: Super Contributor
timestamp: September 27, 2022, 10:45:10 pm
content: There was some note (can't find a link) about VW updating their software to alert of pack issues and bring the car in for a specific cell swap. Maybe if it gets bad it would affect nearby packs, or there could be a safety risk?So its basically a numbers game to get lower cost to the manufacturer within 8 year warranty:- Battery failures * full replacement cost of the battery pack- Cell failure * cost of a cell replacement + presumably higher BMS/initial cell manufacturing costsOf course for the end user, replaceable packs is preferred. But, you'd want to know reliability first.

author: james_s
author_rank: Super Contributor
timestamp: September 27, 2022, 10:51:05 pm
content: I have mixed thoughts on that. In my experience with battery packs, most of the time when one cell fails the rest are already in rather poor condition. Then if you try to replace the one bad one with a new one then the others are much weaker. The best you can do usually is replace a bad cell with another used cell and squeeze a bit more life out of it. I don't think many people will be repairing EV packs themselves though, there will be businesses that buy dozens of salvage packs and rebuild them with tested and matched cells.

author: MT
author_rank: Super Contributor
timestamp: September 27, 2022, 11:21:27 pm
content: Tesla 4680-battery pack not very serviceable thread.https://www.eevblog.com/forum/chat/tesla-model-y-4680-battery-pack-not-very-serviceable!/msg4356226/

author: thm_w
author_rank: Super Contributor
timestamp: September 28, 2022, 12:00:10 am
content: Quote from: james_s on September 27, 2022, 10:51:05 pmIt seems to be a bit different in EVs, one pack can be in a poorly cooled area and get hotter, meaning it fails earlier. Or you can have a defective pack:Quotehttps://www.autoevolution.com/news/volkswagen-recalls-10000-id3-and-id4-units-due-to-cell-defects-199757.htmlPart of this is simply due to the larger number of cells, more chance of something going wrong, add in the high energy densities and fast charging, etc.

author: tom66
author_rank: Super Contributor
timestamp: September 28, 2022, 08:17:30 am
content: Realistically, the 8 year warranty on these packs is not good enough if they're unserviceable like this. It needs to be 15 years minimum, with a guarantee of 70% capacity at 15 years and 80% at 7-8 years.
Strange power lead for power points on desk - Page 1
Forum section: electronics / general

author: tom66
author_rank: Super Contributor
timestamp: October 11, 2022, 10:17:13 pm
content: Does anyone recognise this connector that is fitted to a set of power sockets on my new (second hand) desk? I think I have found the connector on the internet, as part of the "START" system, but I wonder if it is a more standardised connector as that does not look like a perfect match (no obvious mating locking lug for instance on mine and the keying looks different than the pictures, but hard to tell). Pin spacing is roughly 10mm and current rating seems to be around 5A or less going by the fuses on the power points, and the centre pin is marked as an earth. Does not seem to be an IEC connector of any standard form. I'm after a BS1363 plug end to connect these, or even better an IEC coupler for my UPS, which wasn't included with the desk.

author: Monkeh
author_rank: Super Contributor
timestamp: October 11, 2022, 10:38:24 pm
content: That there is a Wieland ST18/3, I believe. They're available with a little searching, RS appear to have plentiful males at least.I'm guessing you've been saddled with some old OE Powerbar or Powerbox bits.

author: themadhippy
author_rank: Super Contributor
timestamp: October 11, 2022, 11:02:24 pm
content: strange? nah,also used on things like under cabinet lights to link multiple units together,for examplehttps://www.kempstoncontrols.co.uk/92-931-3053-1/Wieland/sku/676833or maybe just cut the end of one of thesehttps://www.any-lamp.co.uk/gst18i3-connector-cable-2m-al140284and fit the plug of choice

author: Monkeh
author_rank: Super Contributor
timestamp: October 11, 2022, 11:11:09 pm
content: Quote from: themadhippy on October 11, 2022, 11:02:24 pmBearing in mind those are GSTs, and the system here is ST.

author: themadhippy
author_rank: Super Contributor
timestamp: October 11, 2022, 11:21:46 pm
content: Bugger me,will pay more attention next time im linking lights together as i could swear they were the same thing as we used about 30 year ago on sockets like the above,.As an aside have they bothered with the earth bond to the metal frame that gets shoved in the other end of the socket?

author: SL4P
author_rank: Super Contributor
timestamp: October 12, 2022, 08:32:55 am
content: Pay attention to the mating key ways when ordering.
The AMD 7000 embargo had lifted. - Page 1
Forum section: electronics / general

author: Black Phoenix
author_rank: Super Contributor
timestamp: September 26, 2022, 01:15:13 pm
content: https://youtu.be/nRaJXZMOMPUImpressive stuff performance wise but 95ºC makes me a little anxious...

author: tom66
author_rank: Super Contributor
timestamp: September 26, 2022, 01:39:53 pm
content: Quite amazing that just one generation they managed to get roughly 20-30% better performance, and a base boost clock of 5.6GHz is baffling.

author: coromonadalix
author_rank: Super Contributor
timestamp: September 26, 2022, 02:37:39 pm
content: we had a war on efficiency / heat dissipation etc ... and now its the total oppositeNvidia GE 4000 can max up to 480 wattsinsaneAmd cpu and Intel one'sI tought an 850watts psu would be more than enough ....

author: klr5205
author_rank: Regular Contributor
timestamp: September 26, 2022, 02:51:34 pm
content: Quote from: coromonadalix on September 26, 2022, 02:37:39 pmRight? I have a brand new 850W supply and an NH-D15 sitting on the shelf waiting on these announcements to decide which team I'm going with this time. I thought I would be comfortably in the overkill category but it seems like what I have will be merely "adequate" haha

author: Monkeh
author_rank: Super Contributor
timestamp: September 26, 2022, 03:25:36 pm
content: Quote from: coromonadalix on September 26, 2022, 02:37:39 pmThere's a big difference between these top end parts and general desktop machines. The vast majority of users don't need anything approaching that power, and that includes most EEs here. Typical business class desktops today idle well under 20W and will rarely even hit 100W at full load - and those aren't even the low power solutions.

author: Black Phoenix
author_rank: Super Contributor
timestamp: September 26, 2022, 04:11:13 pm
content: Quote from: klr5205 on September 26, 2022, 02:51:34 pmWith this new gen of parts, my Corsair AXi 1200W PSU stopped being on the "Overkill" field to be almost in the "Recommended" tier...Also regarding the temperature, direct die cooling could be the solution -https://youtu.be/y_jaS_FZcjI