hybridfree/eevblog-posts huggingface dataset:
DC-DC Power supply recommendation - Page 1
Forum section: electronics / general

author: allenc
author_rank: Contributor
timestamp: September 17, 2023, 08:41:39 pm
content: I'm searching for a DC-DC step up power supply. The application is simultaneously driving up to 3 NEMA 17 steppers drawing ~1A each at 28-36V using DM542T drivers. I want to use a common 18V tool battery, which typically start out in the 21V-ish range. The application has a low duty cycle; the motors will move infrequently (couple times a minute) and briefly (2-10 seconds.)There are a lot of small, cheap DC-DC SMPSs around. I've found they can't deliver the current even unloaded. I'm thinking I need something in the 120-150W range.The budget is not super tight: anything around $200 or less is fine. Nice to haves would be a control line to startup/shutdown the PS and an enclosure. The closest I've found is the Meanwell DDR-120B line. They've got 24V and 48V output versions. The former is a bit too low voltage and the later is too high... The 24V can supposedly be cranked to 28V but I'm hoping to not have to play such games and I'd rather operate at higher voltage for better torque and lower current. I don't actually *know* that I couldn't use 24V (which is right at the low end of the DM542T driver specification,) but I'd like to just avoid the guesswork and buy something that solves it.

author: soldar
author_rank: Super Contributor
timestamp: September 17, 2023, 09:24:04 pm
content: You might consider using two batteries in series and dropping a few volts if necessary. Probably more efficient.

author: allenc
author_rank: Contributor
timestamp: September 17, 2023, 09:37:13 pm
content: I have considered that. Do you have any converter in mind? 42V to 36V or less?

author: soldar
author_rank: Super Contributor
timestamp: September 17, 2023, 10:43:15 pm
content: Quote from: allenc on September 17, 2023, 09:37:13 pmDropping very few volts should raise efficiency. Stepdown modules seem to be more common, more efficient and cheaper than boost step-up modules.I am using several of these and they work well:https://www.ebay.com/itm/404206822347DC CC 9A 300W Step Down Buck Converter 5-40V To 1.2-35V Power moduleThey are nominally limited to 40 V input. It may be that(1) you could find one with a higher input or(2) you could measure and find the batteries do not go up that high or,(3) the device will accept a few more volts for a while without problem.They are cheap enough that you can test them. I bought a bunch of them and have them around for whenever I need one. I have one right next to me feeding a printer that requires two different voltages and I do not have the original PSU. Rather than providing the two voltages I just supply the higher one and step down from there.

author: Someone
author_rank: Super Contributor
timestamp: September 17, 2023, 11:53:20 pm
content: Change to lower voltage motors, its the easiest parameter to change.
Cheap(ish) flying probe for test of prototypes? - Page 1
Forum section: electronics / general

author: implor
author_rank: Regular Contributor
timestamp: September 13, 2023, 12:46:54 pm
content: I want have more automated testing of my designs.Do flying probes exist for small scale testing?Alternative is to do rigs for every new designs with pogo pins.Any experiance?As an EE I'm fine with verifying A board but when they ask for >20 I'm not doing it.

author: thm_w
author_rank: Super Contributor
timestamp: September 13, 2023, 10:30:46 pm
content: Google has lots of info:https://learn.adafruit.com/how-to-make-a-pogo-pin-test-jighttps://learn.adafruit.com/how-to-build-a-testing-fixture/solder-pogo-pinsFlying probe is going to be very expensive, so doesn't make much sense unless you are manufacturing PCBs or something that changes on a daily basis.Usually you'd re-use the main PCB, or make a simple two layer carrier PCB to hold the pogo pins. If you can keep the probe positions consistent with revisions (eg keep the connectors in the same location) then you won't need to re-layout your carrier PCB.In other cases a self test is possible, just need power and a loopback connector or some other test connector that plugs into your IO.

author: Benta
author_rank: Super Contributor
timestamp: September 13, 2023, 10:44:29 pm
content: Another solution could be to include the test points/connector as a part of your PCB design as a break-away part of the PCB after testing.

author: implor
author_rank: Regular Contributor
timestamp: September 14, 2023, 05:43:11 am
content: Quote from: thm_w on September 13, 2023, 10:30:46 pmI understand your position. Say we do 15-ish boards designs every year. I feel it may be cheaper to have a flying probe like system instead of designing and build a dozen test rigs.In my (somewhat naive) head a flying probe system at the basic is a XYZ position machine with a camera and pogo pin. It should not be THAT expensive for something basic.

author: implor
author_rank: Regular Contributor
timestamp: September 14, 2023, 05:45:30 am
content: Quote from: Benta on September 13, 2023, 10:44:29 pmYes I have done this before. Unfortunately most designs I do today can't have traces routed out due to some requirements we have (no bare copper exposed at the edge). But generally it is a good solution!

author: tinfever
author_rank: Regular Contributor
timestamp: September 17, 2023, 06:24:01 am
content: Something small scale / DIY for this showed up on Hackaday recently.https://hackaday.com/2023/08/11/hackaday-prize-2023-circuit-scout-lends-a-hand-or-two-for-troubleshooting/Probably still not a good solution for a business to DIY their own version of this though.
Ceiling fan receiver RH788R EE - Page 1
Forum section: electronics / general

author: DenCraw
author_rank: Contributor
timestamp: September 14, 2023, 02:54:03 pm
content: Hello, I would like to know if anyone is familiar with the "receiver" for a ceiling fan. This is model RH788R.I changed the driver that was burned but I think something must have happened with the serial eeprom.I have saved the data I had and formatted it and now it doesn't work at all.I put the data back in and speed 6 and 5 work. I estimate that it will have some parameters for the PWM. (pure guesses).The rest of the board is in order (voltages, thyristors, triacs, etc.).If anyone can provide me with the contents of the eeprom I would appreciate it.Maybe it is different for each model depending on the engine. Any help is welcome.
Great video explaining lots of BGA stuff  (Mainly Nvidia GPUs & PS3) - Page 1
Forum section: electronics / general

author: DavidAlfa
author_rank: Super Contributor
timestamp: September 14, 2023, 08:46:01 am
content: I never had a PS3 neither I'm a chip designer but I enjoyed it quite a bit (Perhabs due my own ignorance).Do you remember that "reballing" epidemic where all 2006-2009 laptops/consoles were failing after just 3-5 years?This video talks a lot about it, targets mainly the PS3 YLOD/RLOD plague, but applies to most of devices of that era.Basically new generation chips and existing packaging technology didn't got along, as well several screw-ups along the fabrication chain.Talks a bit of everything, specially BGA chip packaging like thermals, chip bumping, underfilling ...

author: wilfred
author_rank: Super Contributor
timestamp: September 14, 2023, 01:22:54 pm
content: Thanks for that tip. A very interesting video even for someone who has never played a PS3. I have a Toshiba laptop that died after 10 years and a week of hot and heavy work encoding my DVDs. I'm wondering if the NEC/Tokin caps are the reason now.
Please help identify the chip - Page 1
Forum section: electronics / general

author: @_Lis
author_rank: Contributor
timestamp: September 13, 2023, 02:11:52 pm
content: Good day. Please help identify the chip sop 6 3x3mmTruck MAN 2000, the engine control unit, the ceramic boardThere are 2 of themThanks in advance

author: u666sa
author_rank: Frequent Contributor
timestamp: September 13, 2023, 04:14:26 pm
content: No go.Provide pics of ECU body marks and ECU board markings from all sides.AND/orTruck model year, engine, trans. (idea is to be able to find ECU exposed on google images)

author: @_Lis
author_rank: Contributor
timestamp: September 14, 2023, 04:19:16 am
content: Thanks, I'll do it today

author: @_Lis
author_rank: Contributor
timestamp: September 14, 2023, 02:16:09 pm
content: Sorry, otherwise I can't send

author: MT
author_rank: Super Contributor
timestamp: September 14, 2023, 02:26:15 pm
content: Quote from: @_Lis on September 13, 2023, 02:11:52 pmProvide a photo of the pcb so we can see the surrounding components.

author: @_Lis
author_rank: Contributor
timestamp: September 14, 2023, 02:34:20 pm
content: Sorry, otherwise I can't send

author: @_Lis
author_rank: Contributor
timestamp: September 14, 2023, 02:41:53 pm
content: Sorry
where to buy electronic components in sweden - Page 1
Forum section: electronics / general

author: e0ne199
author_rank: Regular Contributor
timestamp: September 19, 2023, 07:12:46 pm
content: hello everyone, I have just moved to sweden recently ( in Uppsala ) but I don't really know where to buy electronic components here...is there anyone from Uppsala here who can show me the store that sells electronic components (like resistor, etc)?

author: bingo600
author_rank: Super Contributor
timestamp: September 19, 2023, 07:27:46 pm
content: Maybe kjellhttps://www.kjell.com/se/sok?q=resistorerSeems there are two shops in Uppsala.But they're prob not cheap ....Click "Butiker" in top right (Butiker = shops)Write Uppsala in the search (left) , and two shops will be shown.Click on the shop to see opening hours + addressOutchhh ... 159 SEK for 600 resistorsOr maybe look at amazon.se , seems to be a bit cheaper than kjellI'd just order on Aliexpress, if I were you./Bingo

author: e0ne199
author_rank: Regular Contributor
timestamp: September 19, 2023, 09:12:48 pm
content: Quote from: bingo600 on September 19, 2023, 07:27:46 pmdamn that's expensive..I'd like to order them from Aliexpress because it is far cheaper than that one but I'd like to personally visit the store to see other components as wellthx for the info by the way

author: Someone
author_rank: Super Contributor
timestamp: September 19, 2023, 10:05:53 pm
content: Quote from: bingo600 on September 19, 2023, 07:27:46 pmAbout the same as resistors at Australian electronics retail, want small quantities stocked in a physical shop? have to pay somehow.

author: langwadt
author_rank: Super Contributor
timestamp: September 19, 2023, 10:18:47 pm
content: Quote from: Someone on September 19, 2023, 10:05:53 pmyeh, hard to see a way to make a business needing a huge stock of parts or else most will be disappointed that what they need isn't there and when selling some mostly just a few components to those who need it now because they forgot to order online
Here's a weird package  - Page 1
Forum section: electronics / general

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: September 12, 2023, 01:09:51 am
content: https://www.ebay.ca/itm/262409809952Anyone ever see something like this?

author: Stray Electron
author_rank: Super Contributor
timestamp: September 13, 2023, 01:09:03 pm
content: Nope, I've never seen anything like it and worked with a lot of the very early ICs back in the day. I wonder what kind of socket it fit? I notice that the pads on the top of the IC also use a different spacing than the pins.Have you contacted the seller to see if they can tell you more about where the IC came from or was used for?

author: BrokenYugo
author_rank: Super Contributor
timestamp: September 13, 2023, 07:21:53 pm
content: I suppose when you're AT&T you can just order custom packages for your custom ICs.Looks like it might be two DIP36 patterns overlapped?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: September 13, 2023, 10:20:56 pm
content: Tough to use on a breadboard though.
HAWAII fire - Page 1
Forum section: electronics / general

author: strawberry
author_rank: Super Contributor
timestamp: September 09, 2023, 02:51:23 pm
content: pearlharbor then this happen, too many coincidence indeedwe sent 5Bilion by acident to UKR how about HAWAII no comment my icecream is meltinghawaian people won US army and not gonna giveup their land just like that

author: gnif
author_rank: Unknown
timestamp: September 09, 2023, 03:41:02 pm
content: https://www.eevblog.com/forum/chat/forum-rules-please-read/Please see rule #5.Locking.
Dave's dream machine goes in for a service - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: September 06, 2023, 05:49:28 pm
content: Well, we all know Dave wants this machine, and here is a service bulletin on one of them. Diagnosing electrical issues, and done in Floriduh.

author: SeanB
author_rank: Super Contributor
timestamp: September 06, 2023, 06:08:36 pm
content: The Wife Unit also has a video....

author: Macbeth
author_rank: Super Contributor
timestamp: September 06, 2023, 09:07:58 pm
content: I'm a fan of Rainman Ray and this was a hilarious video for an electrical check and oil change on a proper Back to the future style DeLorean. Ew, who remembers 20W50?

author: Stray Electron
author_rank: Super Contributor
timestamp: September 06, 2023, 09:14:57 pm
content: Quote from: Macbeth on September 06, 2023, 09:07:58 pm0W20 is the new 20W50.

author: Benta
author_rank: Super Contributor
timestamp: September 06, 2023, 09:26:29 pm
content: Just wish they'd given the car a proper engine instead of the crappy PRV V6.

author: Bud
author_rank: Super Contributor
timestamp: September 06, 2023, 10:17:26 pm
content: That overhead mounted metal box would surely kill him in an accident, would not it

author: Macbeth
author_rank: Super Contributor
timestamp: September 06, 2023, 10:59:09 pm
content: There is a reason the car was transported in a trailer and Ray didn't give it his usual road test. It is clearly illegal on roads even in Florida which is a state that allows some total atrocities of motor vehicles to exist and drive on their highways.Having said that I would enjoy watching a spin around his shop area and the railroad. In the quiet times, you know?

author: amyk
author_rank: Super Contributor
timestamp: September 07, 2023, 03:29:23 am
content: Quote from: Benta on September 06, 2023, 09:26:29 pm
Delorean getting an oil change and being looked over in detail. - Page 1
Forum section: electronics / general

author: Gossamer2
author_rank: Newbie
timestamp: September 07, 2023, 02:02:59 am
content: Hi Dave and gang,I know you love Deloreans, and especially anything to do with Back to the Future.I came across this YouTube video which just got posted of one of the movie vehicles being worked on and getting an oil change. Lots of detail!And also one from his wife going for a ride in it.
Anyone have experience with this "Batteriser Batteroo" IC? - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: September 06, 2023, 12:06:25 pm
content: Hi!Anyone have any experience with this "Batteriser " IC? It looks very interesting.RegardsErikhttps://www.digikey.no/en/product-highlight/n/nexperia/battery-life-booster-ics?utm_medium=email&utm_source=npa&utm_campaign=144225_NPA2309A&utm_content=mainproductlearnmore_NO_1727-Nexperia&utm_cid=14051237&mkt_tok=MTQ0LU5DQi0wMzAAAAGOCImaI0bLEnzVtxSCs8MuV98gGD5ScZXuUk129FyolQsw21Wx3NITYctc5-iHCdr6Cclri1iujbZ2m2GuTKcyCDx-O9AmMwVT49Or9MHdabp6M6-_

author: mikerj
author_rank: Super Contributor
timestamp: September 06, 2023, 05:39:02 pm
content: More information on the Nexperia web site:https://www.nexperia.com/products/analog-logic-ics/power-ics/battery-management-ics/NBM7100ABQ.htmlThis isn't really a "Batteriser" style solution which was just a boost converter to supposedly stop some devices shutting off prematurely as cell voltage declined, instead this is a kind of active power integrator, converting short high current load demands into longer duration lower current battery demand which e.g. coin cells tend to cope much better with.

author: thm_w
author_rank: Super Contributor
timestamp: September 06, 2023, 09:20:30 pm
content: https://www.eevblog.com/forum/dodgy-technology/nexperia-battery-life-booster-for-iot/

author: tom66
author_rank: Super Contributor
timestamp: September 06, 2023, 09:41:46 pm
content: It's an interesting chip, I can see a few use cases of it, but many of them would be served by having a CR2450 cell instead. So this chip would (imo) only make a huge amount of sense if you couldn't otherwise fit CR2450 into your product.

author: tszaboo
author_rank: Super Contributor
timestamp: September 06, 2023, 10:14:50 pm
content: The IC is quite new, so no long term tests from third parties. The tech described would work. If you have a lithium cell, and you occasionally want a large current from it, it passivates itself, so the ESR goes up. Way up, into the 100 Ohm region easily. Then your RF gizmo isn't going to work. Traditionally the solution is to place a supercap on the cell, but this might just be a bit better. I plan to test it at work, because it's interesting for one reason or another.
2024 World Battery & Energy Storage Industry Expo (WBE) - Page 1
Forum section: electronics / general

author: Natalia Zeng
author_rank: Newbie
timestamp: September 07, 2023, 06:42:12 am
content: 2024 World Battery & Energy Storage Industry Expo (WBE)2024 World Hydrogen Energy Industry Expo (WHE)Date: August 8th-10th, 2024Venue: 1st and 2nd Floor, Area A, China Import and Export Fair ComplexAddress: No.380, Yuejiang Zhong Road, Guangzhou, ChinaReview of WBE 2023Organized by Guangzhou Honest Exhibition Co., Ltd, the 8th World Battery & Energy Storage Industry Expo (WBE 2023) was successfully held this August 8th-10th at Area A, China Import and Export Fair Complex, Guangzhou.Spanning over 100,000 sq.m, the show occupied a total of 8 exhibition halls, setting up 3957 booths, almost double from last year. 1205 exhibiting companies joined the show. The number of battery cells, packs and energy storage solutions exhibitors amounted to 476.The bustling three days counted 137,500 visits in total, including overseas buyers from over 50 countries and regions, such as the USA, Germany, Korea, France, Japan, UK, Sweden, Belgium, Czech Republic, Singapore, Malaysia, Indonesia, India, Thailand, Brazil, South Africa.China Battery Industry (Guangzhou) Summit, China Energy Storage Industry Ecology Conference, World Hydrogen Energy & Fuel Cell Industry Conference and the first-ever two-day factory tour program constituted the biggest highlights of WBE 2023.Preview of WBE 2024WBE will strive to break its own show size record again in 2024, expecting to occupy a total of 13 exhibition halls, amounting to 165,000 sq.m to bring together an estimated 2000+ premium exhibitors.Giving overseas buyers a first-hand and in-depth look at China’s leading battery and battery equipment manufacturers, the highly recommended two-day factory tour program will make a grand comeback in 2024. We look forward to the active participation of more overseas visitors!Live Events & Activities of WBE 20242024 China Battery Industry (Guangzhou) Summit2024 China Energy Storage Industry Ecology Conference2024 World Hydrogen Energy Industry Conference2024 Two-Day Factory Tour ProgramExhibitor Profile1)All kinds of Batteries, Battery pack & cell, BMS2)Energy Storage Products3)Battery Charging & Swapping products4)Raw Material and Components for all kinds of batteries5)Battery manufacturing equipment, testing equipment and instrument6)Battery recycling and international logistics7)Hydrogen energy and hydrogen energy application areaBooth reservation for WBE 2024 is now open. Please don’t hesitate to contact us.Contact usGuangzhou Honest Exhibition Co., LtdContact person: NataliaMobile: +86 18565156106E-mail: Nataliawbe@163.com
Dual MAX98357 mono amps grounding issue - Page 1
Forum section: electronics / general

author: aaron94
author_rank: Newbie
timestamp: September 01, 2023, 10:52:33 pm
content: Hi everyone,I was wondering if I could get some assistance with an issue I’m experiencing with an audio amplifier raspberry pi hat I’m trying to get working.Basically it uses two MAX98357 mono amp ics to give me two seperate +/- right and left audio channels to drive two small speakers, which is what I wanted. And this works fine.But I also wanted to wire up a 3.5mm audio jack for headphones, and they all use a common ground, wired to the sleeve of the jack.So not really knowing anything about the hat I purchased for the pi (this is for a quick and dirty internet radio I needed to make and never wanted to put too much effort into it to begin with) I ran the left channel positive and the right channel positive to the 3.5mm jack and then I only wired up the left channel negative to the sleeve of the jack. I just assumed the two channels already shared a common ground without checking.The left channel sounds fine on the earphones but the right channel, the channel that I ignored the negative side of, had a nasty digital hiss on it. 🐍So I tried joining both grounds and this made both channels hiss.At this point I had no idea it was even a dual mono amp.I’ve found a few articles online about others experiencing this issue and people have said it simply cannot be done, the amp hat is only capable of driving two seperate isolated speakers.I’m wondering if this can be done, but I’m not sure how? I don’t really have much AC skills. Could I use two isolation transformers and somehow get two channel outputs with a common ground?Thanks a lot! I attached a quick schematic.

author: tooki
author_rank: Super Contributor
timestamp: September 04, 2023, 10:51:36 am
content: The key here is to understand that OUTNis not ground.There are ways to bridge two channels via a resistor network, but the 3 pins of the headphone jack must remain floating with respect to ground. (Note that I can’t guarantee it works when using two discrete amp chips, rather than one stereo chip: stereo chips usually stagger the left and right output pulses; two mono chips wouldn’t know to do that.)You’re better off getting a different hat that has outputs that are more useful to you.
SKALA: The Computer That Controlled the Chernobyl Reactor - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: September 02, 2023, 11:37:16 pm
content: Enjoy:

author: Veteran68
author_rank: Frequent Contributor
timestamp: September 03, 2023, 02:22:01 am
content: ^^^ Nice touch with the Commodore 64 running the nuclear plant!

author: 5U4GB
author_rank: Super Contributor
timestamp: September 03, 2023, 11:49:43 am
content: Quote from: BrianHG on September 02, 2023, 11:37:16 pmWhat happened to Worf's forehead ridges in the video?

author: RAPo
author_rank: Super Contributor
timestamp: September 03, 2023, 12:10:28 pm
content: Thanks, very nice video!
what happened to "Is this stuff going to Russia" topic??? - Page 1
Forum section: electronics / general

author: luudee
author_rank: Frequent Contributor
timestamp: September 02, 2023, 07:05:45 am
content: what happened to "Is this stuff going to Russia" topic???

author: magic
author_rank: Super Contributor
timestamp: September 02, 2023, 07:11:30 am
content: Seems to have been nuked.So much value was lost it will be missed forever :'(editWhat happened to the cry emoticon? Doesn't seem to be working...:'(

author: .RC.
author_rank: Frequent Contributor
timestamp: September 02, 2023, 08:47:45 am
content: Quote from: luudee on September 02, 2023, 07:05:45 amWhat do you mean? It never existed. Here look at this device after I put my sunglasses on.

author: Gyro
author_rank: Super Contributor
timestamp: September 02, 2023, 08:50:00 am
content: They (several) were removed because they had become political, and so, against forum rules. If this one turns political then it will undoubtedly go the same way.

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 02, 2023, 09:15:24 pm
content: Probably got a bit too much to stay on the forum.But the original post with the failed image can be found in the "Stock Electronic Image FAILS" thread.
I want to use distributed computing to help a friend in need - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: September 02, 2023, 01:46:47 pm
content: I recently found out that a good friend of mine has cancer and her health insurance was less than helpful. See this link and the attached screenshot from her Facebook if you want to know more.https://www.gofundme.com/f/4qnbea-chemotherapy-costs?utm_campaign=m_pd+share-sheet&utm_content=undefined&utm_medium=social&utm_source=facebook&utm_term=undefinedI thought back to my Swagbucks mining days and figured that it could be the solution if scaled up. I gave up on it since the profitability is too low for me to continue development on the script, but if the development effort can be applied to many instances, then it would be worth it. I attached a zip of the script I used back then but it would need a lot of modification (or a complete rewrite) to work. I expect that a few hundred instances (each of which needs a unique IP address) would put a big dent in the problem and a thousand or two would completely solve it. Those who want to diversify the effort to other IP limited coins are welcome to.I'm not asking for any share of the funds, my friend is the one who needs it.
LastPass and alts - local domains, hosts and subdomains.  Help! - Page 1
Forum section: electronics / general

author: paulca
author_rank: Super Contributor
timestamp: September 12, 2023, 11:01:52 am
content: Stop using 'paletted' 12 char passwords Paul, they said. Stop generating predictable variants of your password, they said. Use a password manager and 16 character random blobs instead Paul... they said.So, when I moved to "Brave" browser I disabled it's password auto-complete and installed lastpass.Out on the web it works fine. It's how it behaves locally and "in the lab" which is rather upsetting. Upsetting because it is getting some very simple, but very serious things completely wrong.It seems incapable of identifying anything short of a 2nd level domain. It will 100% match domain.com, but when it comes to hosts host1.domain.com and host2.domain.com it's accuracy drops and it gets confused and presents both options randomly.When I log into a new dev node, say "k8sn2.lan.mydomain.com" lastpass asks if I want to up date the password for pve.lan.mydomain.com and even when I edit the hostname to be correct and save the password, the next time I open that node it will offer me the password for a different user from another host again.I briefly googled this and it disappeared rapidly into enterprise config of last pass premium with registered secure DNS integrations and stuff.Is there any middle ground? Are there any "good" password managers which will handle more complex hosts/user/password combos. Like as a developer I might need to remember 2 or 3 different accounts for a machine with a dynamic IP and or port number! I think I have sent LastPass raving insane in a matter of weeks.

author: Shonky
author_rank: Frequent Contributor
timestamp: September 12, 2023, 11:32:37 am
content: Bitwarden can do things url "starts with", "exact", "contains" and a couple of others. You can have more than entry, it just defaults to the last used.Does Lastpass not offer similar options?

author: paulca
author_rank: Super Contributor
timestamp: September 12, 2023, 12:30:29 pm
content: Hmm. I found something. "Domain rules". It seems you can apply "match exact host", "match exact port" to domains.Thats a start I suppose.I can see why they don't do that by default. It's a common issue when the website signup form comes from www2.domain.com but the sign in page comes from auth5.domain.com a lot of password managers just go "what password? That 16 character one I just generated for you? No. Not seen it mate."

author: Shonky
author_rank: Frequent Contributor
timestamp: September 13, 2023, 12:58:32 am
content: Looks like this is what you want:https://support.lastpass.com/s/document-item?language=en_US&bundleId=lastpass&topicId=LastPass/Manage_Your_URL_Rules.html&_LANG=enusBitwarden which I use does seem a bit more flexible:https://bitwarden.com/help/uri-match-detection/I do still have a couple of URLs that occasionally "clash" but really it's so rare I've not bothered to put too much time into trying to fix it.
What open-source embedded project you would recommend for contribution  - Page 1
Forum section: electronics / general

author: YTusername
author_rank: Regular Contributor
timestamp: September 03, 2023, 09:50:20 am
content: Daily work may not be as fun as open-source and community-driven open-source projects. Especially when your work tasks deal with old technologies/tools. I had the opportunity to contribute to Mbed-os with a few PRs and published a few Arduino libraries before. Mbed-os seems no longer maintained as old days. So I'm looking for new suggestions, especially for projects that are relatively easy to get involved in and are active.What you would suggest?

author: tom66
author_rank: Super Contributor
timestamp: September 03, 2023, 10:22:04 am
content: If you know software, KiCAD and FreeCAD are two great projects. FreeCAD is the furthest behind I think, it is getting closer to competing with the likes of Fusion 360 but not quite there yet. KiCAD can already compete with Altium at a lower level, and is rapidly filling in the feature set for higher professional engineering tasks.

author: 5U4GB
author_rank: Super Contributor
timestamp: September 03, 2023, 11:36:01 am
content: You'd have to supply a bit more information on what specifically you're interested in, is it working on an RTOS (e.g. FreeRTOS), getting embedded-device support libraries working on different systems (e.g. libmodbus), getting non-embedded-device libraries running on an RTOS, ...

author: nctnico
author_rank: Super Contributor
timestamp: September 03, 2023, 12:18:25 pm
content: Forking Lwip, rewriting the ugly parts and creating good documentation would be a huge service to the community.

author: YTusername
author_rank: Regular Contributor
timestamp: September 03, 2023, 01:35:42 pm
content: Quote from: 5U4GB on September 03, 2023, 11:36:01 amYou are correct, but I intended to not specify, as I would not like to get biased suggestions. Anything related to embedded software/Hardware including libraries, OS, or sw/hw tools is ok. I would like to check any suggestions although I'm more familiar with C/C++ low-level libraries and new targets support.

author: artag
author_rank: Super Contributor
timestamp: September 03, 2023, 01:56:23 pm
content: Sigrok is an excellent project but the maintainers got burnt out and it's been frozen for a couple of years. I believe the most urgent need is for reviews - it has a number of outstanding PRs but they really need reviewing before adding, in order to keep the codebase consistent (which is an excellent aim to have but is slowing adoption).There are, I think, also many projects that need more or improved documentation. It's not just designers, coders and testers that are needed.

author: NiHaoMike
author_rank: Super Contributor
timestamp: September 03, 2023, 02:09:53 pm
content: Quote from: artag on September 03, 2023, 01:56:23 pmIn particular FX3 support, some projects exist but none have become official yet.
Fan-O-Rama: A Futurama Fan Film - Live Action - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: September 11, 2023, 11:23:36 pm
content: For Futurama fans, what it would look like live:Sadly, only 1 episode.I believe the Planet Express spaceship was not rendered, but a model filmed with stopmotion cameras.Note that there is now an all new season 8 of Futurama on Hulu. They already have 8 episodes out.
Software to draw up wiring for a collection of PCBs based on images - Page 1
Forum section: electronics / general

author: 741
author_rank: Frequent Contributor
timestamp: August 25, 2023, 07:29:51 pm
content: I've been asked to combine a kind of bitmap image of a 'system hookup' with some PCBs and bits of dodgy Veroboard plus a bunch of IDC connectors. It's hard to document it sensibly.To guide me, I'd like to be able to place an image of a board on a canvas, and connect handles at fairly arbitrary positions (it would be fine if the image had to fit into a rectangle, and it'd be OK if I could only attach to the edges).From these handles then I'd like to drag out things like dashed lines with labels and so forth - thereby showing wires etc. Basically the aim is to rough-up an approximation of the assembly but not in a formal schematic sense. It would be possible to do it in KiCad, but it'd take me too long and maybe not give the type of result I'm after just now.Any suggestions for likely software that would run on Windows? There was something called DIA I seem to recall.

author: djsb
author_rank: Super Contributor
timestamp: August 25, 2023, 08:12:23 pm
content: I've seen a few people use Fritzing for this kind of thinghttps://fritzing.org/Not sure if you can import photo's into Fritzing though.Or just import images into paint (or similar) and annotate the photo's using the drawing tools for a very basic layout.

author: tooki
author_rank: Super Contributor
timestamp: August 31, 2023, 01:16:13 pm
content: Quote from: 741 on August 25, 2023, 07:29:51 pmTry draw.ioI use that for block diagrams, wiring diagrams, etc.
Anyone recognize this cream mica capacitor from 1959? - Page 1
Forum section: electronics / general

author: Deactivated-1
author_rank: Frequent Contributor
timestamp: August 28, 2023, 06:45:02 am
content: In a fender amplifier this capacitor usually was red in color, but few of them are cream colored.It's 250pF; +-20% EIA spec Mica in an M4 shell, these are from 1959, maybe someone recognizes what company made it?The last picture shows the usual red colored one, maybe it's the same brand just that a few of them were cream colored?

author: vk6zgo
author_rank: Super Contributor
timestamp: August 28, 2023, 02:45:20 pm
content: In Oz, 1950s micas were usually brown.

author: TimFox
author_rank: Super Contributor
timestamp: August 28, 2023, 03:37:07 pm
content: I remember "postage-stamp" micas from Arco Elmenco, usually red.Catalog pages (black/white) from a 1960 Master catalog:https://hallmanlabs.com/wp-content/uploads/2020/01/ARCO_Electronics_Elemenco_capacitors_1960_REM_24-1.pdfI have some "dip" micas labeled "EM" (which I assume are Elmenco) that are a cream color, as well as "CD" dip micas in the usual dark red that I assume are Cornell-Dubilier.

author: WA1ICI
author_rank: Contributor
timestamp: August 28, 2023, 05:49:16 pm
content: My understanding is that conventional mica capacitors (not silver-mica) in the "postage-stamp" package were brown or cream colored, but silver-mica capacitors were pink or red. Silver-mica capacitors are more stable and more reliable than regular mica capacitors, but the difference at audio should be negligable. I've found both types sound good in audio applications. The brown epoxy "dipped" mica capacitors are always silver-mica, as far as I know.- John

author: TimFox
author_rank: Super Contributor
timestamp: August 28, 2023, 06:05:40 pm
content: "Postage-stamp" moulded micas were either "stacked mica" (alternate layers of metal foil and mica) or layers of metallized mica."Dipped" micas were always silver-mica, and were considered to be more stable than moulded micas.It's not clear from the article below if there is a difference between "silver mica" and the metallized micas available in moulded.https://worldradiohistory.com/hd2/IDX-Consumer/Archive-Consumer-Miscellaneous-ISX/IDX/Electronics-Digest-1983-Spring-OCR-Page-0020.pdf
This car stereo got a bit toasty... - Page 1
Forum section: electronics / general

author: Deactivated-1
author_rank: Frequent Contributor
timestamp: August 23, 2023, 09:43:31 pm
content: Doesnt seem like the thermal protector worked, or maybe it started carbon tracking, although I doubt THAT much current would flow with just 12V trough carbonEven the solder shows signs of melting... probably leaded solder. the radio probably is from the late 90s, the IC looks like it was first used around the mid 90sIt uses a LA4445 output amp, so I guess those are good for up to 200 degrees.The amp still worked until the board crumbled when I bent the output IC a bit to read what it was.I wonder if those capacitors are good

author: tom66
author_rank: Super Contributor
timestamp: August 23, 2023, 09:53:06 pm
content: I've seen a transistor amp IC similar to that (linear amplifier, class AB topology) fail in a similar manner. In my case it was a Sanyo STK amplifier chip, the amplifier chip ran very hot indeed but still worked ok, but after about 10 minutes the left channel would go very distorted. I suspect the high side transistor for the left channel had become leaky, such that as it got hotter and hotter it got leakier and leakier. This led the output voltage to slowly climb, leading to more dissipation in the speaker and STK chip, though it still retained some modulation. It didn't seem like that amp had any DC protection so presumably the speaker could easily be destroyed and/or cause a fire should the amp chip continue to fail in this manner.

author: Circlotron
author_rank: Super Contributor
timestamp: August 23, 2023, 10:04:17 pm
content: That’s a LOT of electrolytic caps!

author: Bud
author_rank: Super Contributor
timestamp: August 26, 2023, 01:02:06 pm
content: The IC may oscillate if capacitors dried out, and generate heat because of oscillation.

author: DavidAlfa
author_rank: Super Contributor
timestamp: August 26, 2023, 03:51:22 pm
content: Classic symptoms of a metalhead having a daily journey from work!(Mine's surviving somehow)
Bluetooth name spoken in original? - Page 1
Forum section: electronics / general

author: RoGeorge
author_rank: Super Contributor
timestamp: August 25, 2023, 07:06:59 am
content: If Bluetooth Wireless got its name after a Vikinghttps://en.wikipedia.org/wiki/Harald_Bluetooth,then how would "blue tooth" be spelled and pronounced in the native language of the Vikings?Found this pagehttps://forvo.com/word/bl%C3%A5tand/#svwith different pronunciations of "Blåtand" in Danish and Swedish, andhttps://www.howtopronounce.com/bl%C3%A1t%C7%ABnnfor Icelandic, but I don't know much about vikings (or if that's the right word to lookup) and what language do they spoke 1000+ years ago, so which spelling/pronunciation would be closer to how the king himself would say "Bluetooth"?

author: RoGeorge
author_rank: Super Contributor
timestamp: August 25, 2023, 07:29:34 am
content: Found somethingBluetooth: The Runes on Your PhoneJackson Crawford
Microsoft Store hiding least helpful reviews/negative feedback? - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: August 24, 2023, 05:49:14 am
content: QuoteThought I'd take a look and read the reviews to see if that is right.https://apps.microsoft.com/store/detail/linkedin/9WZDNCRFJ4Q7Am I missing something?How do I sort least helpful?Just three reviews:QuoteQuoteQuoteQuote31 ratings and only 3 feedback from 2012.What happened? There must have been much more than that.I wonder did they purged the reviews at some point?Looks dodgy to me and I did try Archive but doesn't seem load earlier copies of the page from 2023.I can't see how to filter it by rating or how many rated by star or sort by least helpful.Oh look:https://web.archive.org/web/20161203235630/https://www.microsoft.com/en-us/store/p/netflix/9wzdncrfj3tj#ratings-reviewshttps://web.archive.org/web/20200708082435/https://www.microsoft.com/en-us/p/amazon/9wzdncrfj13v?cid=msft_web_appsforwindows_spotlight&activetab=pivot:reviewstabUnder selecting reviews:So they have limited/obscured it from sorting least helpful.What do you think?

author: ebastler
author_rank: Super Contributor
timestamp: August 24, 2023, 06:03:32 am
content: Quote from: MrMobodies on August 24, 2023, 05:49:14 amIn every product review portal I have come across, a "helpful review" is one where readers deemedthe reviewhelpful -- not one which states that the reviewed product or app is helpful. Why would you be interested in the "least helpful reviews"?

author: Whales
author_rank: Super Contributor
timestamp: August 24, 2023, 06:03:46 am
content: "Most negative" is not the same as "least helpful". "Helpful" != star rating.Generally "helpful" relies on people rating the ratings, but I don't know how they're doing it here.Not to say they're not doing dodgy stuff however

author: MrMobodies
author_rank: Super Contributor
timestamp: August 24, 2023, 08:45:11 pm
content: Quote from: Whales on August 24, 2023, 06:03:46 amQuote from: ebastler on August 24, 2023, 06:03:32 amThank you for pointing that out. I see, so it is not the same in that respect as most negative and so that'd be the votes from other users on a said comment that determines whether it is it helpful or not.Like with anything like that I'd still like to see the negative too with understanding that yes it could just be nonsense but if enough people say one thing whether their comment was voted on or not then that might be helpful for me to observe.I am still skeptical.It would be great to know how many people voted "thumbs up" for a said review to be deemed as "most helpful" but I don't see any.In this case a review that was deemed "most helpful"had no comment in itor indication how many votes that justifies it to the top.
Repair wireless sound bar LG SH4 - Page 1
Forum section: electronics / general

author: sudni
author_rank: Newbie
timestamp: August 24, 2023, 12:44:32 pm
content: Hi all,my LG SH4 wireless sound bar has just broken up on me.It won't turn on, and I've just taken it apart to try and repair it.The photo shows the component that burned out: FB 607With the help of google I could find that it was a ferrite beads, but I can't determine the value.Any ideas?Thanks in advance,Paul.

author: thm_w
author_rank: Super Contributor
timestamp: August 24, 2023, 09:01:41 pm
content: You could measure the nearby FB and get resistance, maybe inductance, package size should be 0805.But realistically the best option here is to just short it out.The only concern is that if something is shorted and caused the ferrite bead to burn, you'll need to figure out what that was and fix it.So maybe do some resistance checks before and after the ferrite, voltage check, feed in voltage or use a DMM to measure the current going through the bead, etc.
IEC EMC Regulation extension from 150kHz to 9kHz - Page 1
Forum section: electronics / general

author: Hawaka
author_rank: Regular Contributor
timestamp: August 24, 2023, 05:40:21 am
content: Hello,I have been recently made aware that the EMC emission standard will be extended down to 9kHz instead of the 150kHz. I researched a bit which standard will be impacted and I found that 61000-6-3 is currently on work regarding this. Working group JWG 6 is active on this topic as you can see here:https://www.iec.ch/ords/f?p=103:14:612416548432972::::FSP_ORG_ID:22022#https://www.iec.ch/dyn/www/f?p=103:23:108506726429685::::FSP_ORG_ID,FSP_LANG_ID:1439,25https://www.iec.ch/dyn/www/f?p=103:38:108506726429685::::FSP_ORG_ID,FSP_APEX_PAGE,FSP_PROJECT_ID:1439,23,106968IEC 61000-6-3/AMD1/FRAG2 ED3 is currently at FDIS stage, meaning they are quite close to publish it.Does any of you have seen this? Any other standard that will be impacted? IMO this could have a big impact on future design as I don’t think they will choose a limit so high that all design work without changes.
Prodigy S7-13P Logic System - Page 1
Forum section: electronics / general

author: prodigy2023
author_rank: Newbie
timestamp: August 23, 2023, 08:55:14 am
content: The Prodigy S7-13P Logic System is depend on Xilinx's Virtex UltraScale+ VU13P FPGA. With higher capacity and performance, The Prodigy S7-13P offers the latest innovation in prototyping, accelerating system validation, and verification.FPGA Resources - Virtex UltraScale+ VU13P Board[/https://www.s2cinc.com/products/fpga-prototyping/logic-system-vu13p]Large capacity and scalability with 3.78M System Logic Cells455 Mb of internal memory12,288 DSP SlicesTechnical Highlights of VU13P FPGA Boards676 high-performance I/Os4x QSFP28 optical interfaces, each supporting 100G applicationsSupports MIPI and x8 PCIe Gen3
The smallest component shop in Akihabara closing - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: August 17, 2022, 11:11:37 pm
content: What a wonderful story! Thanks for sharing.

author: Andy Chee
author_rank: Super Contributor
timestamp: August 22, 2023, 07:05:53 am
content: The shop has been resurrected.... as a museum piece!
Ringtone volume automatically decrease - Page 1
Forum section: electronics / general

author: davidtung
author_rank: Newbie
timestamp: June 21, 2023, 12:32:26 am
content: I have recently purchased iPhone 14, now facing a problem that when anyone call me, my ringtone sound loudly but after few seconds it automatically decreased. I have checked with all of my ringtone but found the same. Even I saw few tutorials and tried but didn't see any updates. My ringer volume taken max level and enabled Toggle but failed.Please help me and thanks in advance.EDIT: Removed spam link

author: ebastler
author_rank: Super Contributor
timestamp: June 21, 2023, 09:30:53 am
content: Like this?https://discussions.apple.com/thread/251930010

author: Jeroen3
author_rank: Super Contributor
timestamp: June 21, 2023, 09:36:18 am
content: Lol,Quote from:https://discussions.apple.com/thread/251875899Other than that I can think of nothing else than limits of the speaker/amp, maybe thermal, maybe range? Too much lows in the ringtone?

author: Psi
author_rank: Super Contributor
timestamp: June 21, 2023, 09:38:56 am
content: You're listening to the ringer wrong.

author: danigavi
author_rank: Newbie
timestamp: June 22, 2023, 07:02:06 am
content: This issue used to happen on my iPhone 11 as well and how I fixed it was by going into Settings > Accessibility > Face ID & Attention > Attention Aware idea. You can try applying this method, good luck.EDIT: Removed spam link

author: Jeroen3
author_rank: Super Contributor
timestamp: June 22, 2023, 07:57:50 am
content: So it is real?I specifically made a ringtone that is the opposite. It starts soft and gets loud. Basically by making sure the frequency is within the optimal range of the small speakers.

author: rennievera
author_rank: Newbie
timestamp: August 21, 2023, 08:47:12 am
content: Seems like this happens often on Android phones too

author: Halcyon
author_rank: Unknown
timestamp: August 21, 2023, 09:11:04 am
content: The three banned users in this thread are the same person. Shill accounts for their garbage spam.