hybridfree/eevblog-posts huggingface dataset:
Branded solder supplies in New Zealand?? - Page 1
Forum section: electronics / general

author: FireHazard
author_rank: Contributor
timestamp: May 16, 2022, 10:37:03 pm
content: Hello,Is there a supplier of branded solder supplies in New Zealand? Multicore, Kester etc. I'm having a hard time with unbranded (overpriced) solder and de-solder wicks (that don't seem to have flux).Maybe I'm doomed to have to order anything of quality from overseas?

author: David Aurora
author_rank: Frequent Contributor
timestamp: May 16, 2022, 11:13:06 pm
content: These guys?https://www.synergyelectronics.co.nz/solder_products.phpI'm in Australia, but I've bought irons from them without any issue before

author: Someone
author_rank: Super Contributor
timestamp: May 16, 2022, 11:28:47 pm
content: https://letmegooglethat.com/?q=multicore+solder+nz

author: amc184
author_rank: Regular Contributor
timestamp: May 18, 2022, 08:34:27 am
content: I've used Synergy Electronics, so I'd second that. Another option is Baskiville:https://www.baskiville.co.nz/products/category/PB_PBFREE-solder

author: FireHazard
author_rank: Contributor
timestamp: May 18, 2022, 11:21:16 pm
content: Quote from: Someone on May 16, 2022, 11:28:47 pmLook...it's not as simple as that. Many places that appear to be NZ stockists are simply shipping in with multi week lead times from all over the world. But thanks

author: FireHazard
author_rank: Contributor
timestamp: May 18, 2022, 11:23:45 pm
content: Quote from: David Aurora on May 16, 2022, 11:13:06 pmThank you very much, a solid recommendation is what I was really looking for. Super.

author: Someone
author_rank: Super Contributor
timestamp: May 18, 2022, 11:30:36 pm
content: Quote from: FireHazard on May 18, 2022, 11:21:16 pmGiven the two suggestions above came up in positions 1 and 3 (and position 2 was element14 who explicitly state the shipping origin and expected delivery date) its pretty clear you didnt do even the most basic of searches. Or, explained your problem....

author: FireHazard
author_rank: Contributor
timestamp: May 19, 2022, 06:06:27 am
content: Quote from: Someone on May 18, 2022, 11:30:36 pmOne of the mysteries is the internet is that not everybody gets the same search results. I get element14 where when I recently checked and falls into the category of , we just ship stuff from overseas. I don't get Synergy Electronics or Baskiville when I use that search term. I do however find them when I search for..by name one of the specific products.Maybe to avoid pedant triggering in future I'll be sure to include "seeking recommendations" in my ask.
YT interview with Albert Charpentier, the primary designer of the VIC and VIC-II - Page 1
Forum section: electronics / general

author: langwadt
author_rank: Super Contributor
timestamp: May 15, 2022, 07:19:05 pm
content: Dave's Garage has an interest interview with Albert Charpentier, the primary designer of the VIC and VIC-II chipshttps://youtu.be/rs6J_PP7O7k

author: Homer J Simpson
author_rank: Super Contributor
timestamp: May 16, 2022, 12:11:55 am
content: Glenn Keller
Cellphone Radiation - Swiss Made Junk Science - Page 1
Forum section: electronics / general

author: ryanmills
author_rank: Unknown
timestamp: May 19, 2022, 09:55:35 pm
content: This might rank as one of the dumbest things I have seen... Showed up in a Facebook ad... The amount of mistakes and junk science... The reviews by PHd's from "Isarel"... This one just has it all. If you need a laugh, enjoy.Site:https://bodywellchip.com/

author: bd139
author_rank: Super Contributor
timestamp: May 19, 2022, 11:02:13 pm
content: Every time I see these things I wish I had a less strong ethical stance. Then I could be in an amazing picturesque beach hut somewhere nice, drinking a cold, fresh cocktail, with the sounds of exotic birdsong, with the door and curtains shut, air con on, soldering something.
An Honest Audiophile - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: May 14, 2022, 02:39:02 am
content: The audiophile owner of world's best stereo system is at least honest:https://www.youtube.com/clip/UgkxjeW11ME4dgntnGfK7wMWfp76u27Dg5h7

author: rsjsouza
author_rank: Super Contributor
timestamp: May 14, 2022, 09:33:16 pm
content: Truly interesting; the rigour and the craftsmanship applied to the room is absolutely unparalleled.That turntable? And the loudspeakers? 8GA silver cables? Incredible!

author: David Aurora
author_rank: Frequent Contributor
timestamp: May 14, 2022, 10:39:38 pm
content: Quote from: EEVblog on May 14, 2022, 02:39:02 amI clicked this thinking it would be a funny hate-watch a few weeks ago and absolutely loved it by the end. Really didn't end up going where I assumed it would have.

author: Bicurico
author_rank: Super Contributor
timestamp: May 15, 2022, 08:06:50 am
content: Life is too short.

author: bsfeechannel
author_rank: Super Contributor
timestamp: May 15, 2022, 11:50:03 pm
content: Quote from: Bicurico on May 15, 2022, 08:06:50 amHaving accomplished all his goals in life didn't work out very well for Wile E. Coyote.

author: james_s
author_rank: Super Contributor
timestamp: May 16, 2022, 12:09:05 am
content: That's pretty cool, amazing looking room. There is a lot of idiocy in the audiophile world but a lot of it I look at as art, it's not that different than spending a ton of money building a custom hotrod car, I mean what's the point? It looks cool, it's fun, that's about what it comes down to. I've seen people spend tens of thousands of dollars on paintings or jewelry that doesn't even do anything, at least audio gear is functional, even if the thing that differentiates it from much less expensive gear is mostly cosmetic/artistic craftsmanship. I'm not an audiophile or a hot rodder or an art collector but to each their own.
Question about soldering station - Page 1
Forum section: electronics / general

author: tonycstech
author_rank: Regular Contributor
timestamp: May 15, 2022, 10:23:27 pm
content: Looking to buy JCID AIXUN T3B station and i have a question.They have T210 and T115 tips as an option. Which one is which ? Is one larger then another or better in any way ?I need to solder SMD's very small components as well as use large tips for cleaning large areas under the chips etc, so i am not sure which one to pick.Thanks !
Inappropriate use of equipment. - Page 1
Forum section: electronics / general

author: paulca
author_rank: Super Contributor
timestamp: May 15, 2022, 11:37:19 am
content: The cat apparently got into a fight (I heard it), came home stinking of kerosene heating oil, covered in black dust and gunk. Decided it was probably in her interest to under go the trauma of a bath with washing up liquid.After giving up drying the cat with the towel, I left her to do her self, she shivered like a leaf. I tried to warm her up. FB friend suggested a hair dryer and I was like "Nope."... oh ... ah ... I do have a soldering hot air station.So I lifted the dishevelled cat onto the workbench and set about her with the hot air gun. 100*C it's lowest setting, I always kept my hand on her fur where I was blowing and after a few false starts she seemed to get the idea and even started turning around to help me get her all over.When she was done with that, she jumped up behind the curtains to resume preening herself. I set the gun to 250*C and pointed it into the space behind the curtain, about 18 inches from her. Putting my hand in there and it was a nice little hot air bubble for her.I carried that on for another 5 minutes and she seemed dry enough that I would allow her to finish off on top of the Wifi Router. I did lift her onto the gaming PC and run "FurMark" (pun/irony ack.) to produce 35*C air out the top of the vents, but while she seemed to like the warmth, she didn't like the perch and went off to sit in a sunny window instead.TLDR; Bathed cat. Used soldering gun to dry it. Then attempted to use the gaming PC and a torture test to warm/dry the cat.

author: paulca
author_rank: Super Contributor
timestamp: May 15, 2022, 11:41:22 am
content: FurMark, out of interest, does make an awfully good red wine bottle warmer. Bring a cold one home from the shop? Slap it on the outflow vents, run Furmark, 20 minutes later your wine is a nice 25*C.
Quantel Harry Service Manual - Page 1
Forum section: electronics / general

author: dexters_lab
author_rank: Unknown
timestamp: May 15, 2022, 09:33:27 am
content: This is for those who love reading old service manuals!Last week i finished scanning the Quantel Harry service manual and it's now available here on archive.org:https://archive.org/details/quantel-harry-installation-service-manual-11-87-2003562-005Harry was the worlds first digital non-linear video editing system released by Quantel in 1986, the hard disks alone weighed 200Kg and had just 8 minutes of video storage, all uncompressed full resolution broadcast quality video, how things have changed now we can edit HD video on our phones!The service manual i have for it is probably the only copy in existence so it was important to get it's nearly 400 pages archived.Happy reading
ID a surface mount "ZIF" socket for SOIC - Page 1
Forum section: electronics / general

author: TomS_
author_rank: Frequent Contributor
timestamp: May 12, 2022, 02:46:27 pm
content: Hi all, wonder if anyone can ID the manufacturer/part number of a ZIF style socket for SOIC chips, per image?The two halves open up like a trap door to reveal the chip and hold it in place and press the pins down onto contact when closed.Thanks!

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 12, 2022, 09:08:35 pm
content: Google search "soic-16 socket", 3rd picture.Wieson Technologies G6179-07000001, but probably there're more makers doing the same socket style.

author: Benta
author_rank: Super Contributor
timestamp: May 12, 2022, 09:31:31 pm
content: Huh?

author: thm_w
author_rank: Super Contributor
timestamp: May 12, 2022, 11:19:52 pm
content: Here is the link to what David found:https://www.aliexpress.com/item/32810140492.htmlThe commonly available spring type is cheaper, if you don't need that specific footprint:https://www.aliexpress.com/item/1107288077.htmlBut I guess ability to lock is useful.
Segmented Displays: questions you've never asked, answered - Page 1
Forum section: electronics / general

author: Howardlong
author_rank: Super Contributor
timestamp: May 06, 2022, 02:45:59 pm
content: This vid on segmented character displays turned up on my Youtube recommendations today.As a result, I rapidly came to the conclusion that I have a long way to go in my life-long quest to become a certified Fixated Nerd.

author: tooki
author_rank: Super Contributor
timestamp: May 06, 2022, 07:33:53 pm
content: That was fantastic, thanks for sharing!

author: Howardlong
author_rank: Super Contributor
timestamp: May 06, 2022, 11:40:20 pm
content: Quote from: tooki on May 06, 2022, 07:33:53 pmAs the title of the thread suggests, it answers questions that were so left field they'd never cross my mind, but equally I consider myself more educated afterwards than I was before.The content is solid nerd entertainment and education, and as a side point the production standard is way above what I could ever hope to achieve.

author: RJSV
author_rank: Super Contributor
timestamp: May 07, 2022, 09:57:58 am
content: This guy has me curious, about video production, and what kind of hours this video took, a comprehensive and artistic summary, obviously.What kinds of image processing, associated 'team', and video production? Like, to superimpose a hypothetical display fragment, over an existing Casio watch, etc. Almost makes me forget, original topic. But, topic itself, especially the historic telegraph links, is a 10.0 in my opinion. Straight up perfect.

author: tooki
author_rank: Super Contributor
timestamp: May 07, 2022, 12:17:44 pm
content: FYI, watch his 3 part series on LCDs. It’s also fascinating.

author: Kean
author_rank: Unknown
timestamp: May 07, 2022, 07:28:02 pm
content: He has a great production standard and covers interesting nerdy topics. Quite amazing he has so few subscribers.It looks like the algorithm (and some social media mentions) has lead to his subscriber count more than doubling in just the last day from 5.42k to 12.2k ... no 12.3k and climbing.https://socialblade.com/youtube/user/posymusicEdit: Up to 16.5k subscribers and still climbing...

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 08, 2022, 06:56:32 pm
content: It appeared on my YT feed last week, has truly excepcional content!Came here to post it but I saw you already had done so!

author: Howardlong
author_rank: Super Contributor
timestamp: May 12, 2022, 03:28:30 am
content: Quote from: Kean on May 07, 2022, 07:28:02 pmNow 77k subs and a million views on a video about 7 segment displays. That's a lot of nerds!

author: tom66
author_rank: Super Contributor
timestamp: May 12, 2022, 09:10:01 pm
content: This is a fantastic video. His other video on mouse cursors is great too.
Nice video about Strange Color LCD actually changing color of the pixels - Page 1
Forum section: electronics / general

author: Miyuki
author_rank: Frequent Contributor
timestamp: May 11, 2022, 05:45:13 am
content: I just stumbled on this nice video about cool color displays.It is a cool way how they change the color of the pixel

author: dzseki
author_rank: Frequent Contributor
timestamp: May 11, 2022, 08:42:39 am
content: Back in the day I had a Siemens S25 phone with such a color display, was cool at that time, though the color change -as you can see- is pretty slow.
DP10013 Probes - Page 1
Forum section: electronics / general

author: cyberwasp
author_rank: Contributor
timestamp: May 09, 2022, 07:15:57 pm
content: Does anyone know wher I can purchase additional probes for the micsig DP10013 differential probe. The original probe tip is to short to fit in the work area. I've looked on several sights but only list ones for multimeters. Looking for something similar to the attached photo. TIA
US weapon, Switchblade 300 suicide drone .. brutal teardown (sort of) ... - Page 1
Forum section: electronics / general

author: BravoV
author_rank: Super Contributor
timestamp: May 06, 2022, 05:15:52 pm
content: US weapon : Switchblade 300 suicide drone ...in a battle field harsh tear down (sort of)Wikipedia reference ->https://en.wikipedia.org/wiki/AeroVironment_SwitchbladeOther photos and details can be read at the source below.Source ->https://southfront.org/us-made-switchblade-loitering-munitions-see-first-failure-in-ukraine-photos/

author: trophosphere
author_rank: Frequent Contributor
timestamp: May 06, 2022, 06:55:43 pm
content: With the payload being tantalum capacitors no wonder they are cheap and effective.

author: thm_w
author_rank: Super Contributor
timestamp: May 06, 2022, 09:03:00 pm
content: Quote from: trophosphere on May 06, 2022, 06:55:43 pmCheap for the military I guess, not for us.They did spring for that high reliability red solid tantalum capacitor at the back. Maybe they want some portion of the board to not burn to a crisp.
micsig DP10013 - Page 1
Forum section: electronics / general

author: cyberwasp
author_rank: Contributor
timestamp: May 06, 2022, 01:44:50 am
content: Looking for a little advice. I purchased a Micsig DP10013 quite awhile ago but never used it due to lack of knowledge. I took it out today and hooked it up to my Siglent 1202X-E Now, I plugged the usb power into the scope and the probes lights came on. I'm still leary to connect it to an AC source so I put it on the scope 1khz output.Question 1) to test it this way should I put the scope input to ac, "does that matter." I didn't and the scope did not produce a square wave,.question 2) I'd eventually like to test the ac output of my APC battery backup to verify it is a true sincewave but have reservations having the probe powered by the scopes usb port.Would it be wiser powering it wioth a usb power pack? TIA

author: cyberwasp
author_rank: Contributor
timestamp: May 06, 2022, 05:46:27 pm
content: Just an udate. I tried again with the scopes 1khz test point and it worked. After careful inspection of the probe tips I noticee a clear cover over them. Would apreciate any help on the second part of my question.question 2) I'd eventually like to test the ac output of my APC battery backup to verify it is a true sinewave but have reservations having the probe powered by the scopes usb port.Would it be wiser powering it with a usb power pack? TIA

author: thm_w
author_rank: Super Contributor
timestamp: May 06, 2022, 08:59:46 pm
content: The USB supply is isolated inside via a DC-DC converter.
Are there any events like DesignCon that take place in Europe? - Page 1
Forum section: electronics / general

author: matrixofdynamism
author_rank: Regular Contributor
timestamp: April 19, 2022, 01:59:00 pm
content: DesignCon is described as "DesignCon is the premier high-speed communications and system design conference, offering industry-critical engineering education in the heart of electronics innovation — Silicon Valley.". The event appears to bring engineers together from all over the world. It appears quite impressive. However, it is held in the USA. Is such an event held anywhere in Europe?I have not ever seen anyone cover such an event via a vlog/blog in detail.

author: free_electron
author_rank: Super Contributor
timestamp: April 19, 2022, 02:43:07 pm
content: meh .. designcon isn't what it used to be. i stopped going. it's a cow and horse show.There are plenty of trade fairs. Hamburg, nurnburg, frankfurt. there used to be one in eindhoven (netherlands) too. But they don't really have sessions where a speaker would present a topic. That seems to be a US thing.Get on a plane and come to Designcon. You can stay at my place.

author: metrologist
author_rank: Super Contributor
timestamp: April 19, 2022, 02:55:04 pm
content: EuMW week and MWChttps://www.travelperk.com/blog/best-tech-conferences-in-europe/https://techspoamsterdam.nl/europe-tech-conferences/free_electron there was a user name on a CB forum long ago. Maybe about the same geographic location. Maybe not the same dude?

author: free_electron
author_rank: Super Contributor
timestamp: April 19, 2022, 03:48:34 pm
content: Quote from: metrologist on April 19, 2022, 02:55:04 pmnever been on a CB forum. I've used that handle since at least 2000.

author: matrixofdynamism
author_rank: Regular Contributor
timestamp: May 06, 2022, 02:01:39 pm
content: We really need some platform where engineers can learn about the latest developments and the best practices. Universties can't do it. Courses are well, what course to do and from where? It is better for there to be an annual event where the best minds and present the best training to the engineers from around the world.
JLCPCB: Only ever choose USD, otherwise your invoice is inaccurate/wrong - Page 1
Forum section: electronics / general

author: Whales
author_rank: Super Contributor
timestamp: May 06, 2022, 07:18:30 am
content: I always choose to pay in AUD on online platforms where I can. I presume other people also prefer their own country's currency when it's available, amongst other things it lets you avoid your bank's exchange fees.It seems like this is a mistake on JLCPCB: all it does it change the invoice to be in AUD (based off a guessed exchange rate), the charge to your credit card will still be in USD (with your bank's exchange rate then converting it to AUD).I find this rather weird and unexpected. Maybe it's commonplace? I was able to get a corrected USD invoice by manually asking JLC's support, but they also said this:QuoteSo in other words: you should only ever choose USD on jlcpcb.com, everything else just makes your invoice less accurate (or in my case for reimbursements: flat out wrong).

author: jeremy
author_rank: Super Contributor
timestamp: May 06, 2022, 07:50:29 am
content: A lot of Chinese websites do this; they store the amount that they charged you in USD, and then when you go to generate the invoice they use the exchange rate of the current day, rather than the day when you paid. It’s completely incorrect, butI just always do everything in USD now.

author: retiredfeline
author_rank: Frequent Contributor
timestamp: May 06, 2022, 07:59:08 am
content: Quote from: Whales on May 06, 2022, 07:18:30 amIt depends. With my card it's always better to pay in the overseas biller's chosen currency rather than AUD, otherwise their bank may do "dynamic currency conversion" which has a poorer rate than the card. I got caught by this a couple of times holidaying overseas, but also applies to online purchases from overseas. In the case of JLCPCB it looks like they always bill in USD and the AUD is just to give an estimate.
Looking for Cross over designs in Proteus.  - Page 1
Forum section: electronics / general

author: chinoy
author_rank: Regular Contributor
timestamp: May 06, 2022, 09:34:05 am
content: Building a speaker setup for my workshop.Amp is an old Akai Amp class a/b from the 80s.Plan is to build a speaker with 3 drivers.one tweeter, One 5"Mid range driver and one 8"Woofer.Looking for passive cross over circuits.Im testing various designs in Proteus. If you have any designs in Proteus it would be nice.Else even if its just a drawing I can enter it up in Proteus. So far I have one working simulation.Ill share whatever I build along with the Proteus files.Im a noob at this. Just something to do help me unwind after a hard day at the production line.Right now Im scoring the net for various ideas. And trying to enter them up in Proteus.
Video card heat sinks - artistic flare involved? - Page 1
Forum section: electronics / general

author: xrunner
author_rank: Super Contributor
timestamp: May 05, 2022, 11:48:13 pm
content: I was sorting through some computerjunkparts and it got me thinking (I know - you thought you smelled smoke ...) about the heat sinks on some of these parts. In the pic I show a couple of video cards. Top one is an ASUS with Nvidea GPU and the bottom is an unnamed card with Raden GPU. It has a heat sin that seems, shall we say, utilitarian.The Nvidia card has a very "stylish" heat sink, seemingly done with an artistic flare to attract attention. BUT - I am not a heat sink design expert so I do not know, perhaps it was done according to sound engineering design principles. Does anyone have an opinion on why the Nvidea design is so artsy looking? Does it work better than simply having plain vertical fins like the other card has?

author: thm_w
author_rank: Super Contributor
timestamp: May 06, 2022, 12:30:26 am
content: Its for style points.You can see they added more aluminum over the GPU, and made the fins longer in the memory area. Would this have any significant effect compared to just having them all the same length? not really.The top one is a 2 slot card, bottom one is a 1 slot card. So one may fit in your system, the other may not. The longer vs. shorter fins will make a difference here of course, as more material is used.Apparently a good 3D printed heatsink design can net 20% reduction in material and 20% temperature decrease though, ending up with some wild shapes. At a large increase in cost. Extruded aluminum profiles like this are very cheap.https://www.3dprinting.lighting/3d-printed-heat-sinks-display-higher-efficiency/https://www.sciencedirect.com/science/article/abs/pii/S0306261918308237https://www.digikey.com/Site/Global/Layouts/DownloadPdf.ashx?pdfUrl=F51974C9A6D544F1A7D8F119514B67FFhttps://www.electroniclinic.com/heat-sink-types-of-heat-sink-and-design-of-heat-sink/

author: xrunner
author_rank: Super Contributor
timestamp: May 06, 2022, 01:51:54 am
content: Quote from: thm_w on May 06, 2022, 12:30:26 amThat makes sense. The only thing I could come up with was that the curved fin patterns perhaps creates an air flow pattern due to different temps along the curves. Seemed like a whole lot of design effort for a little video card.However; that effort made little sense to me because the case would have (or should have) fans moving air inside. So, what good would some slight airflow pattern do when much more air was moving anyway due to the fans.But then again - they put the effort into the curvy design anyway ... I suppose for sales ...

author: Whales
author_rank: Super Contributor
timestamp: May 06, 2022, 07:32:53 am
content: My favourite:https://i.redd.it/ig1gcft7d7941.jpg
Possible sketchy source for parts - Page 1
Forum section: electronics / general

author: mrcrud5
author_rank: Contributor
timestamp: May 04, 2022, 01:57:17 pm
content: Hey guys,I need some advice. I have a product that uses a pic16f1938, and there doesn't seem to be any available on Digikey, Mouser, or Newark which are my usual sources. I found this profile on instagram which added me and I asked her if they had the that model of pic. She was able to give me a quote for 100 of them. Price seems average.Here is the profile:https://www.instagram.com/yibattery/Do you think she'll run off with my money? Am I being naive? Does anyone here have any experience with these random chinese suppliers?

author: tom66
author_rank: Super Contributor
timestamp: May 04, 2022, 02:50:58 pm
content: Anyone doing business over Instagram is a fool IMO. There are too many scams there.Nonetheless, if you pay via PayPal you will probably be safe enough, as PayPal does tend to favour buyers fairly well. If on the other hand they ask for crypto, bank transfer, Western Union etc., run a mile unless you are really sure about them.Chances are they don't really have the part, they'll go out to someone else who will, add a markup and ship onto you - that's if they don't run off with your money. They may do the typical Win-Source thing and come back to you asking for more money, or offering an alternative-but-compatible device (in so far as it *looks* the same, even if it's completely different chip).

author: BrokenYugo
author_rank: Super Contributor
timestamp: May 04, 2022, 04:04:54 pm
content: That's much more than "possibly sketch", possibly sketch is more like eBay from not China.

author: mrcrud5
author_rank: Contributor
timestamp: May 04, 2022, 05:50:31 pm
content: yea, she asked for a bank transfer. Yea fuck it, not going to risk it. The parts shortage is making me search for components in the worst places

author: AndyC_772
author_rank: Super Contributor
timestamp: May 04, 2022, 07:55:24 pm
content: Not sure what package you're after, but I found these:https://uk.rs-online.com/web/p/microcontrollers/7985305

author: thm_w
author_rank: Super Contributor
timestamp: May 04, 2022, 09:33:39 pm
content: This site was mentioned in another thread:https://www.lanka-micro.com/search?keyword=pic16f1938https://www.eevblog.com/forum/chat/any-experience-of-lanka-micro/
Vactrols - RoHS / non cadmium sulphide LDR?  - Page 1
Forum section: electronics / general

author: vixo
author_rank: Regular Contributor
timestamp: May 03, 2022, 12:54:56 pm
content: I still have cause to use the old "vactrol" style optocouplers which are really (as far as I know) just a LED and a LDR. I was interested to find that there are now companies making RoHS compliant devices which I was surprised to see as I didn't realise there was any alternative to using cadmium sulphide in a LDR.does anyone know what the deal is with these things? Is there a RoHS friendly LDR out there? Are they using different technology? Or might it just be a normal cadmium sulphide LDR with an RoHS sticker on it??
How accurate are the due dates on mouser/digikey for new stock due to arrive? - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: May 01, 2022, 07:19:34 am
content: I'm just wondering how people are finding digikey/mouser due dates for new stock due to arrive.If it says "1000 due/expected on x date" how likely are 1000 to actually arrive around that date (+/- a week or 2)

author: John B
author_rank: Frequent Contributor
timestamp: May 01, 2022, 07:31:49 am
content: Currently my experience is that a new arrive date arrives around the time the old arrive date, arrives.

author: Psi
author_rank: Super Contributor
timestamp: May 01, 2022, 09:41:26 am
content: Good to know, i was wondering if i should order/pre-pay now to secure them.But sounds like it's better to keep options open and just order if/when they are actually in stock.

author: jeremy
author_rank: Super Contributor
timestamp: May 01, 2022, 11:59:00 am
content: My experience is that they are pretty worthless at the moment

author: tom66
author_rank: Super Contributor
timestamp: May 01, 2022, 12:30:52 pm
content: My experience is they're accurate to within 1-2 weeks, but that was about 6 months ago when we last received scheduled orders. No idea now.

author: David_AVD
author_rank: Super Contributor
timestamp: May 01, 2022, 10:10:34 pm
content: I've had mixed results with the due dates on Mouser and Digikey.I don't know if the quantity indicated for a particular date takes whatever back orders they already have into account.

author: John B
author_rank: Frequent Contributor
timestamp: May 02, 2022, 02:44:29 am
content: I have no guaranteed way of obtaining a particular part, however I would note that a few items I wanted came back into stock before the due date, but only like a few 100's or 1000 of them, like they found some behind the couch. All promptly swept up in a day or two.If you're able to find a few different manufacturers of the part, I'd be signing up for notifications on each site and be ready to scoop up what you need.

author: jeremy
author_rank: Super Contributor
timestamp: May 02, 2022, 05:59:22 am
content: FWIW, I know firsthand of some large vendors (like an FPGA company that starts with X) that are charging an "expedite fee" aka "skip to the front of the queue fee" if you contact the right people to get your parts, and I presume that this basically subtracts stock from the distributors orders before they get it. With that sort of nonsense going on, it's hard to trust the distributor dates for high demand items (through no fault of their own).I have also experienced the random, "found behind the couch" delivery too.

author: tom66
author_rank: Super Contributor
timestamp: May 02, 2022, 09:10:20 am
content: Quote from: jeremy on May 02, 2022, 05:59:22 amA similar 'X' FPGA company who has just been gobbled up by a certain large three-letter acronym firm told us that the expedite fee has no guarantee attached to it. It could move you to the front of the queue, but it might not.
Hacking Corsair PSU - Page 1
Forum section: electronics / general

author: mandor
author_rank: Regular Contributor
timestamp: April 20, 2022, 07:20:43 pm
content: Hello.Does someone know how to hack a Corsair PC PSU? Specifically I have Corsair VS450 that I would like to output 13.8V on 12V rail.It uses ST9S429-PG14 chip. I have a hard time reading SMD chips on the back. The one under the ST9S429 seems to be LM393.There are also 3 TL431K regulators in that area.Should I try to mess with the reference pins of the TL431K? I also read somewhere that I might have to ground FaultProtectionOutput pin of ST9S429-PG14?Thanks.

author: mandor
author_rank: Regular Contributor
timestamp: May 01, 2022, 06:03:04 pm
content: So what I ended up doing is probing around the 3 voltage regulators, reading resistor values near them and searching for continuity to out voltage rails and ground. I decided one of them is 12V regulator by resistor values and connections and measured resistance from pin1 to ground to be around 3k1. Took a 50k potentiometer and thought 40k-45k would be a good start to run in parallel to ground not to disturb the value too much. Fired up the PSU and 12V rail read 12.8V. Tweaked it a bit until it showed 13.8.I have no idea if this is the right thing to do but it seems ok.
Mouser -> Are other people having issues? - Page 1
Forum section: electronics / general

author: Eigerdesign
author_rank: Contributor
timestamp: April 30, 2022, 09:31:45 am
content: Hi ForumWe are having extreme issues contacting Mouser in Europe.They don't answer emails (for 1+ Month), their phone rings out after 30+ attempts and countless time listening to there we are busy please hold... and then cutoff.They are now really effecting our business as we have thousands $ in backorders that are being held for the odd component on ever shifting lead-times. All we want to do is cancel these components to release what they have now in stock.Also they seem to be using a practice of telling you stock has been allocated to you (in stock) and then taking it away on later order update. This will cost us some extra 2 thousand in chips to source from the dreaded grey marked at 100x the price!!!!Any advice extremely welcome... I am considering driving there and knocking on the door! I have heard rumor's they are in trouble financially, but that does not seem to be a valid reason to ignore your customers.Thanks Tony

author: jpanhalt
author_rank: Super Contributor
timestamp: April 30, 2022, 10:53:38 am
content: My experience over the past 10 years is that Mouser (USA) competes almost equally with DigiKey in service. It's amazing you cannot get a phone answered. I suspect you have the US contacts, but in case not:Office Hours (M-F):7am to 8pm CSTCustomer Service & Technical SupportToll Free:(800) 346-6873Phone:(817) 804-3888Fax:(817) 804-3899During my working years, I made a few international calls to solve problems.

author: HighVoltage
author_rank: Super Contributor
timestamp: April 30, 2022, 03:20:08 pm
content: I am dealing with Mouser Germany on a regular basis and every time I had an issue, I called them in Munich and within minutes I had someone on the phone.To me Mouser has one of the best services around.

author: BeBuLamar
author_rank: Super Contributor
timestamp: April 30, 2022, 05:01:36 pm
content: I am in the USA and I don't use Mouser that often but I found them very good. The reason I don't use them often is with my company and not them. My company always pay them late so everytime I order something from them I have to get my company to pay their previous bill.

author: tom66
author_rank: Super Contributor
timestamp: April 30, 2022, 09:43:06 pm
content: I've generally found it easier to reach out to the US arm of either company instead of contacting the UK arm, though I do recall Digi-Key has a dedicated UK phone line (staffed by Americans but working time shifted hours, but they're limited to what they can do until the other team comes on.)
Remotely disabled farm equipment - Page 1
Forum section: electronics / general

author: cybermaus
author_rank: Frequent Contributor
timestamp: May 01, 2022, 06:47:47 pm
content: Normally I'd rant about manufacturers doing this sort of stuff, but I guess this is OK:https://edition.cnn.com/2022/05/01/europe/russia-farm-vehicles-ukraine-disabled-melitopol-intl/index.html

author: magic
author_rank: Super Contributor
timestamp: May 01, 2022, 06:52:14 pm
content: I wonder if it means that the equipment will not work if it can't phone home or if stealing it is fair game as long as you remove the SIM
The Near Impossibility of Making a Microchip - Page 1
Forum section: electronics / general

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: April 29, 2022, 08:24:22 pm
content: Found this cool little PDF while reading about IC fabrication, specifically about the Micralign from the 1970s. It's more of a history lesson.https://www.chiphistory.org/exhibits/Near%20Impossibility%20of%20Making%20a%20Microchip/I_and_T_Fall1999_PP44-52.pdf

author: rsjsouza
author_rank: Super Contributor
timestamp: April 29, 2022, 08:30:38 pm
content: Thanks for sharing. I love those stories from early electronics and computing.

author: mawyatt
author_rank: Super Contributor
timestamp: April 29, 2022, 10:23:02 pm
content: Thanks for the link.Today these SOTA systems are producing 5nm chip features on 12 inch wafers, and cost ~$300M!!Remember ~15 years ago when we had a 40nm CMOS that cost ~$4M just for the masks alone!! Have no idea what a 5nm mast set cost today!Best,
Any experience of Lanka Micro ? - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 29, 2022, 06:25:57 pm
content: Just found some unobtainium parts I need atwww.lanka-micro.comvia octopart - anyone have any knowledge of them ?

author: TimNJ
author_rank: Super Contributor
timestamp: April 29, 2022, 06:38:15 pm
content: Just purchased some parts from them. Received via DHL pretty quickly. Haven’t tested them yet, so the only thing I can guarantee is that they deliver ~something~.The encouraging thing was that they accepted PayPal which has good buyer protection. If they only accepted wire transfer, well, then that would be a red flag.

author: TimNJ
author_rank: Super Contributor
timestamp: April 29, 2022, 06:39:16 pm
content: I also don’t know the requirements to get listed on OctoPart but I assume they don’t just take anybody with a URL?
evry tracking - Page 1
Forum section: electronics / general

author: m3vuv
author_rank: Super Contributor
timestamp: April 28, 2022, 02:55:27 pm
content: Hi all it seems hermes s now rading under a name called evri,had a notification my parcell from ebay was going to be delivered yesterday,t wasnt then another saying its going to be today,thought would ceck on there st to see where it is,its beeing sorted at there hub aparantly!,seems the same crappy unreliable company with a name change,anyone else had shit like this from them?,they seem best avoided imho!.

author: steve30
author_rank: Frequent Contributor
timestamp: April 29, 2022, 01:41:36 pm
content: I always found Hermes pretty good round here, and pretty quick. They have often got stuff to me much quicker than I expected. Though I may have benefited from living in a place which is very well served by many shops/companies/services.I have had one or two items over the years which seem to have gone back or forth between depots (they probably got missorted), but generally they are OK.I don't know why they have changed their name. Evri sounds silly and the logo looks equally silly.

author: gnif
author_rank: Unknown
timestamp: April 29, 2022, 02:50:47 pm
content: Locked.Please stop polluting the forum with topics that are completely off topic!
LMI 6431AC help required - Page 1
Forum section: electronics / general

author: Sighound36
author_rank: Frequent Contributor
timestamp: April 24, 2022, 06:51:53 pm
content: Hello ChapsI would appreciate a little assistance indentifying a part Its stumping myself so any suggestion on what this is and where I could source some would be great. I am just being dumb possiblyHowever on the off chance I am not.The offending article is TO-92 package LMI 6431 AC if these are not availble a suitable replacement that could be recommended would be great as well.If this is in the wrong section then apologies to the modsMany thanksSighound

author: Gyro
author_rank: Super Contributor
timestamp: April 24, 2022, 08:33:51 pm
content: At a guess, it's a TL431. Maybe vanilla, maybe a variant. AC suffix are normally 1% tolerance 0-70'C.EDIT:https://www.alldatasheet.com/view.jsp?Searchword=6431AC&sField=1

author: Sighound36
author_rank: Frequent Contributor
timestamp: April 27, 2022, 09:52:43 am
content: Quote from: Gyro on April 24, 2022, 08:33:51 pmHello GyroThank you for your suggestion it is appreciated.Will look into this later.Sighound

author: Sighound36
author_rank: Frequent Contributor
timestamp: April 28, 2022, 02:51:31 pm
content: After managing some more time on this subject now:-Possible candidates so far:-https://www.ti.com/lit/ds/symlink/tl1431.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1651151931504&ref_url=https%253A%252F%252Fwww.mouser.com%252FOr the slighly more updated version I am suspecting either will be fine assumiming these are a match for the original part.https://www.ti.com/lit/ds/symlink/tl431.pdf?ts=1651120920131&ref_url=https%253A%252F%252Fwww.google.com%252FMany thanksSighound

author: Zero999
author_rank: Super Contributor
timestamp: April 29, 2022, 11:52:14 am
content: Did the part work before the legs came off? If so, it's possible to file down the package, solder some new leads and cover it with epoxy. You'll need to be extremely careful, when re-soldering it to the board. Wrap a damp piece of paper towel round the new leads can protect them from getting too hot for the epoxy and solder it as quickly as possible.
EEVBlog store - Page 1
Forum section: electronics / general

author: jknightandkarr
author_rank: Contributor
timestamp: April 30, 2022, 12:47:36 am
content: Hope this is the right area, but just wondering, but when is stock going to be updated on the EEVBlog store? I really wish to order the 121gw dmm and a uCurrent Gold, been checking on and off for sometime now, and thought I would ask. The meter says 1 in stock and the uCurrent always out of stock, so not sure if its right or for some reason the page isn't updating for me. Thanks.Joe

author: Brumby
author_rank: Unknown
timestamp: April 30, 2022, 01:58:11 pm
content: It could be supply issues or Dave being slack.My money is on supply issues.

author: jknightandkarr
author_rank: Contributor
timestamp: May 02, 2022, 05:39:03 pm
content: I hope that its just component stock issues or something simple, while I have the files to diy my own, I don't have any SMD soldering exp, so better if I can just buy one. Thanks.
Any Matlab Simulink experts? How to compare fast signals in continuous mode?  - Page 1
Forum section: electronics / general

author: Miyuki
author_rank: Frequent Contributor
timestamp: April 27, 2022, 11:44:58 am
content: I was trying to do some control loop fun with Matlab SimulinkBut when I was trying to build a current mode converter and run it in the continuous mode it just goes crazy. The comparison just happens all over the place. It just does not work for these fast signals.When I run it as discrete on reasonably short steps it behaves as it should. But it should be a continuous system.Is there some setting I have to change to work at this time scale?
Solved, obsolete. - Page 1
Forum section: electronics / general

author: evb149
author_rank: Regular Contributor
timestamp: April 27, 2022, 08:08:03 am
content: Solved, obsolete.

author: RoGeorge
author_rank: Super Contributor
timestamp: April 27, 2022, 08:40:05 am
content: Just order what you need, when you need, that is my advice.Saying this because I still have some TTL ICs bought during the 90s, for "just in case". 30 years later, that "just in case" never happened. They cost more back then, they took space to store and time to handle around the lab, they took time to make an inventory of them, etc. Overall, stock is more a drag than a savior. Not to mention how many times I've agonized searching for hours something I knew I have, and how many times I had to buy again the same part only because I couldn't find it.Then, there is the tendency to design with what you have on stock instead of using the proper fit for your new ideas, which may limit or cripple new designs.Then, it's a bad moment to stock on electronics right now. Parts are about 5 times more expensive, and it is expecting for the prices to come to be lower and come to normal in the future.
I just learned something: an electric dipole in a capacitor - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: April 25, 2022, 07:37:49 pm
content: I did not expect the second result after the conductor was removed:

author: SpiralElektronik
author_rank: Newbie
timestamp: April 25, 2022, 08:38:14 pm
content: The conductor provided a channel so that the charge distribution between the poles could change. With no conductor between the poles theres no way for the field to redistribute the charge. When the conductor is removed the charge stays just as static electricity will stay on a balloon. No magic here but a cool demonstration of electric fields non the less!

author: Marco
author_rank: Super Contributor
timestamp: April 25, 2022, 09:15:58 pm
content: Question is why the unchargd metal barbell with insulated rod (presumably) is mechanically stable. Guess the spherical shapes and the near perfect centering makes the capacitance of the system almost perfectly constant regardless of rotation.

author: BrianHG
author_rank: Super Contributor
timestamp: April 25, 2022, 10:02:13 pm
content: I have another question:Does the length, shape, and bend of the aluminum foil effect the results?Could it have been longer to the edge of the 2 spheres?Could it have been narrow like a flat wire?What if it were shorter, just the length in between the 2 spheres?

author: RoGeorge
author_rank: Super Contributor
timestamp: April 25, 2022, 10:33:30 pm
content: When you put a piece of wire (here the Al foil) inside a capacitor, you get two series capacitors. When voltage is applied, the 4 plates of the two series capacitors will charge with +/-/+/-.This means at one end of the Al foil we have -, the other end +. Some of the charges will stick to the plastic balls after the foil is removed, each ball will get opposing polarity charges, which will turn them into a polarized dipole. Once the charges stick, when an electric field applies, the polarized dipole will orient itself into the E field.Could have been used any other way to deposit some electric charges, e.g. the triboelectric effect, and the plastic dipole will orient itself just the same.https://youtu.be/2GQTfpDE9DQStatic electricity can be very fun:

author: CatalinaWOW
author_rank: Super Contributor
timestamp: April 26, 2022, 01:38:25 am
content: Electric field strength is greatly increased by addition of foil strip. Before the conductor is added field strength is 5000V divided by plate separation, by eyeball something on the order of 500 V/cm. Since there is no voltage across the conductor when it is added, the field strength is the same 5000V, but divided by the total spacing between the conductive elements which is something like 10 times shorter. Charges which stayed put originally got ripped from their home atoms and moved.A variation on the same experiment that would be interesting and informative would be to modify the foil strip so it covered the ends of the balls. Field strength would be essentially the same, but the balls would be totally isolated from it, and I would expect no retained charge.
Spring Cleaning - make things fit by resizing ESD bags - Page 1
Forum section: electronics / general

author: jpyeron
author_rank: Regular Contributor
timestamp: April 23, 2022, 05:36:52 pm
content: I have bunches of "new in package" components when I needed one but bought bulk. When I order items from digikey, amazon, aliexpress, etc. they come in ESD bags that are either heat sealed in 3 or 4 sides.But they are always too large for my parts drawers.Decided today to bring them to my kitchen and use my food sealer

author: NiHaoMike
author_rank: Super Contributor
timestamp: April 23, 2022, 05:47:24 pm
content: Faster would be to just fold the bags.

author: jpyeron
author_rank: Regular Contributor
timestamp: April 23, 2022, 05:59:40 pm
content: Quote from: NiHaoMike on April 23, 2022, 05:47:24 pmIt would have made a sad and funny youtube video. The only effective way to fold and keep them fromdoing the expanding dinosaurafter the drawer closed was to staple them. I spent about an hour fighting the bags with rubber bands, paperclips, tape, etc.In the end 10 seconds or less per bag.

author: rsjsouza
author_rank: Super Contributor
timestamp: April 23, 2022, 06:52:06 pm
content: Good idea using the sealer.I recently did a similar cleanup on my parts and I had the same issue with the bags unfolding that caused all sorts of snags when stored in small drawers. In my case, the majority of parts were non ESD sensitive and therefore I arranged them in smaller ziplock transparent bags.

author: jpyeron
author_rank: Regular Contributor
timestamp: April 24, 2022, 12:26:27 am
content: Quote from: rsjsouza on April 23, 2022, 06:52:06 pmI useClear Plastic Reclosable Zip Poly Bags, 2-mil Thick, 2 Inch x 3 InchandNo.1 Coin Envelopes 2.25x 3.5 (Brown Kraft)for non-ESD.I would love tiny ESD safe ziplock ...

author: Someone
author_rank: Super Contributor
timestamp: April 24, 2022, 01:24:29 am
content: Quote from: jpyeron on April 24, 2022, 12:26:27 amSCS 30023:https://www.mouser.com/ProductDetail/SCS/30023?qs=IBIAEHEW5KN0V1ELg8sABw%3D%3Dhttps://www.digikey.com/en/products/detail/scs/30023/34304532"x3" ziplock ESD