hybridfree/eevblog-posts huggingface dataset:
Delco IC cross-reference? - Page 1
Forum section: electronics / general

author: metertech58761
author_rank: Frequent Contributor
timestamp: August 06, 2023, 04:31:19 am
content: Is there any kind of a chart that lists the various Delco ICs and whether they are ASICs or relabeled commercial ICs?I got my hands on an early GM engine control module that has the boards coated but not potted. I opened it up to see what it looked like inside, but every single semiconductor had a Delco P/N on it.

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: August 11, 2023, 08:31:17 pm
content: The Philips ECG catalog listed some older delco semiconductors mostly diodes, transistors and some audio IC's.I have never looked further than that myself although I have crossed a few Delco, Chrysler and Ford audio parts.Jeff

author: floobydust
author_rank: Super Contributor
timestamp: August 13, 2023, 02:07:54 am
content: For car/truck ECU's the IC's are custom. It depends on the era, what year.The MCU/TPU are usually slightly modified stock items. More memory, faster clock, added timers, added I/O ports kind of thing. If you rummage around the firmware you can figure it out.Analog and power IC's are ASICs. Again, some are off the shelf with modifications.GM's volumes allowed them to get Motorola, SGS etc. to make tailored parts.

author: PwrElectronics
author_rank: Regular Contributor
timestamp: August 14, 2023, 06:17:04 pm
content: Probably "house numbered" parts made by one of the major semi mfgrs. May or may not be customized off the shelf. For sure they would likely have higher test specs compared to consumer grade.1980s Ford ECU's tended to use customized Intel micros. I don't know who GM used.

author: metertech58761
author_rank: Frequent Contributor
timestamp: August 25, 2023, 02:56:58 am
content: I was mainly curious as I was told the MCU in some stuff I continue to poke at was originally developed for these early GM ECMs.Figures they would be numbered differently to keep these out of reach of well-meaning hobbyists with soldering irons.

author: Circlotron
author_rank: Super Contributor
timestamp: August 25, 2023, 03:45:02 am
content: Several years ago I fiddled around with an early 90s Delco 808 ECU. This was my go-to forum at the time ->https://pcmhacking.net/forums/
identify smd code help me - Page 1
Forum section: electronics / general

author: Atanas79
author_rank: Newbie
timestamp: August 17, 2023, 05:23:29 pm
content: my shaver Philips hq9760 stop work . After open see on pcb blow smd 6pin with code 90bac which is connected to TEA1230TS . Around smd 90bac - have there is a swollen black dot on the body .After connect li-ion battery 3.5v and start charge - display work and show battery level - and i can start work - but when i disconect charger - - my shaver discharging battery up to 2.5v
high speed traces and solving impedance control .... - Page 1
Forum section: electronics / general

author: luudee
author_rank: Frequent Contributor
timestamp: August 16, 2023, 04:04:54 pm
content: Guys,I have a bit of a design challenge:I have a USB 3.2 controller, on a custom PCB I am designingfor a customer.The customer has requested that both a USB-A and a USB-Cconnector be connected to that single controller, suchthat the customer may choose which interface to use.Now, this sounds simple enough, until you look at the signals.The RX/TX lines for USB 3.2 are point to point, 90 ohmterminated lanes.I must admit, I am not a RF/high-speed PCB layout person.Is there a way to make this work? Placing the connectorsand their pins close together (on opposite sides of the PCB),and just do the best possible impedance matching?I am at loss, any ideas/suggestions?Cheers,luudee

author: nctnico
author_rank: Super Contributor
timestamp: August 16, 2023, 05:28:20 pm
content: You can only achieve this by adding zero Ohm 0402 strapping resistors (or capacitors if you need capacitive coupling) that select which connector to route the signal to. A clever trick is to overlap the pads so the impact on the transmission lines is minimal. A good way for the signals to arrive at the strapping resistors is from a different layer. But there can only be 1 connector placed at the time. You can't have both. If there needs to be an option, then supply a USB-C to USB-A adapter with the product.If the interface is a host, then you can opt to put a USB-C hub chip on the board to create multiple ports.

author: Someone
author_rank: Super Contributor
timestamp: August 16, 2023, 11:10:25 pm
content: Quote from: luudee on August 16, 2023, 04:04:54 pmSounds like a hub /s

author: langwadt
author_rank: Super Contributor
timestamp: August 16, 2023, 11:14:32 pm
content: Quote from: Someone on August 16, 2023, 11:10:25 pmwithout a hub it's only a matter of time before someone complains that they can't use both at the same time

author: luudee
author_rank: Frequent Contributor
timestamp: August 17, 2023, 04:18:08 am
content: Quote from: langwadt on August 16, 2023, 11:14:32 pmWe don't need a hub, it will be an either or solution.Has anybody used something like HD3SS6126 ? I'ts a USB 3 mux. But now I will need somelogic to detect which connector is used ....May be a current sense to control the mux ?!Thanks,luudee
Lithium Ion battery recycling (including EVs) - Page 1
Forum section: electronics / general

author: tom66
author_rank: Super Contributor
timestamp: August 16, 2023, 05:59:30 pm
content: This is really quite an interesting video and addresses some concerns about lithium ion battery sustainability, especially in electric vehicles.I'd be curious as to how much virgin material is expected to be required if processes like these are used.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 16, 2023, 06:14:18 pm
content: Would be interesting to know how much they can actually recover from that black gunk - that video didn't really show much more than a big grinder.I wonder if the occasional NiCd or lead-acid (some walkmans used small lead-acid, also camping lights etc,.) screws things up with contamination.AIUI the biggest problem at the moment with EV battery recycling is getting batteries to recycle, as they're lasting a long time, and then getting repurposed.
Mini PC - who's using those from Ryzen - Page 1
Forum section: electronics / general

author: mengfei
author_rank: Regular Contributor
timestamp: August 08, 2023, 01:41:36 am
content: anyone using any of the brands below or other brands? Are they reliable for long term use? My Phenom PC lasted me 12years & this "Will" be my last PC build so I'm kinda doing some reliability sourcing stuff. thanks guysthinking about these two - AMD Ryzen 9 5900HX or Ryzen 7 6800HS, just some daily task, a few CAD (AD), light gaming & HTPCi think these two are leading ithttps://www.morefineglobal.com/https://store.minisforum.com/my target for my last PC buy lol

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 08, 2023, 02:07:18 am
content: Haven't used that brand but I did get a $100 refurb Elitedesk with a 2400G a while back, great HTPC that can even run some games.

author: mengfei
author_rank: Regular Contributor
timestamp: August 08, 2023, 03:04:25 am
content: cool! i'll check that one out too. thanks

author: rdl
author_rank: Super Contributor
timestamp: August 08, 2023, 04:26:23 am
content: I looked at those a while back. If the lower end will do the job for you, there's no reason not to buy. As you move away from the low end they start to get a little pricey (in my opinion). I ended up buying an Elitedesk Mini also, but I went with an older Intel model. It's been a great little computer so far.

author: mengfei
author_rank: Regular Contributor
timestamp: August 08, 2023, 08:26:50 am
content: i never knew about those Elitedesk, i search the local 2nd hand site here & there are some really cheap one's that the kids can use for their online class & some really expensive ones like the 805 G8! thanks for the info!

author: macboy
author_rank: Super Contributor
timestamp: August 15, 2023, 04:01:16 pm
content: Maybe a little late for you, but also look at Dell Optiplex micro form factor. They are not quite as small as the Intel NUC or that Ryzen you referred to, but close. I bought a 3050 recently. Installed a 5 port sata card into the NVMe slot and a 2.5GbE card into the wifi slot (m.2 "a+e" key), and turned it into a low power consumption file server (about 10 W at idle, not including disks).

author: mengfei
author_rank: Regular Contributor
timestamp: August 16, 2023, 10:04:13 am
content: I'm still in the Market for one.thanks for the input, i'll check that one out too.Still weighing my options, that's a nice idle output on that one. I also am checking for power consumptions since I'll be setting up a Solar System, no pun intended, to cut down on electrical bills.
Are 1.6mm PCBs obsolete now?  USB-C connectors don't fit. - Page 1
Forum section: electronics / general

author: Kasper
author_rank: Frequent Contributor
timestamp: August 15, 2023, 05:49:23 pm
content: I'm looking for a waterproof USB-C connector for an 8 layer PCB. Wanted thru hole pins but they all have short pins. Longest I've found is 1.0mm long pins.Is no one using 1.6mm PCBs anymore? What is the benefit of thinner PCBs, aside from the obvious desire to reduce product size by 1mm?

author: wraper
author_rank: Unknown
timestamp: August 15, 2023, 05:52:30 pm
content: Those pins are not supposed to necessarily protrude from an opposite side of PCB. Even though there are TH mounting pins for more mechanical strength, it's still an SMT connector soldered with SMT process only.

author: nctnico
author_rank: Super Contributor
timestamp: August 15, 2023, 05:54:20 pm
content: Also think about signal integrity where SMT is better compared to through hole. For as long as the metal tabs of the housing can be soldered into a hole for mechanical stability, I'm happy.

author: Kasper
author_rank: Frequent Contributor
timestamp: August 15, 2023, 05:56:35 pm
content: Datasheets are recommending thin PCBs.PCB thickness 0.6mmhttps://www.digikey.ca/en/products/detail/amphenol-cs-fci/10164986-00011LF/18443708PCB thickness 0.6mm to 1.2mmhttps://www.digikey.ca/en/products/detail/cui-devices/UJ31-CH-G-SMT-TR-67/12702600

author: wraper
author_rank: Unknown
timestamp: August 15, 2023, 06:07:06 pm
content: On thicker PCB it may be hard to apply enough paste to fill the hole only partially occupied by a pin. If you do 1.6mm PCB, it would be better to use one with SMT type functional pins as providing enough paste for mounting tabs with Pin-in-Paste technology is much easier and solder preforms can be applied too. Such connectors are generally used in portable devices like phones where PCB thickness usually is on lower side. If you look on desktop PC hardware, it's generally 1.6mm and any cards that are put into slots must be 1.6mm to fit properly.

author: Kasper
author_rank: Frequent Contributor
timestamp: August 15, 2023, 06:10:38 pm
content: Quote from: wraper on August 15, 2023, 06:07:06 pmThat makes sense. Thank you.

author: HwAoRrDk
author_rank: Super Contributor
timestamp: August 16, 2023, 09:12:17 am
content: I've seen some USB connectors where the through-hole pins are actually intended to be press-fit, not soldered. So the pins don't need to protrude all the way through the board.
Phone chargers and babies electric shock - Page 1
Forum section: electronics / general

author: bonzer
author_rank: Regular Contributor
timestamp: August 15, 2023, 08:57:23 pm
content: Hello everyone. Recently I came across some news about two cases of mobile phone chargers which caused death of young babies that had electric shock by putting them in mouth. There are two different cases, one in Kazakhstan and the other in India. I can't tell for sure whether these news are fake or had some changes from the original. I just wanted to understand, from a technical point of view is this possible and what could have happened? Could it be because these chargers were low cost and not certified or it could happen also with one of the famous brands?

author: ataradov
author_rank: Super Contributor
timestamp: August 15, 2023, 09:18:20 pm
content: In all reported cases like this I've seen, the issue was always in a dodgy third-party charger.While not a good idea to stick it in your mouth, there is no real danger of electrocution from a properly designed and undamaged power supply.Another common thing that comes up as a fire risk is that people use completely frayed cables taped over with some package tape. This is especially the case for Apple products because their cables are expensive and people want to hold off changing them.

author: woofy
author_rank: Frequent Contributor
timestamp: August 15, 2023, 09:44:47 pm
content: https://youtu.be/rwEh4jsVew0

author: AndyBeez
author_rank: Frequent Contributor
timestamp: August 15, 2023, 10:07:40 pm
content: Tragic if true, but phone chargers are more likely to be a choking hazard.The story headlines, Toddler killed after putting a phone charger lead in her mouth while it was plugged into the wall.Possibly an earth loop condition if the charger cable was put in a mouth and a hand touched a metal earth?There would need to be a forensic examination of the scene, including testing of the electrical installation and a dissection of the charger by a lab with the technical skill and reputation of TUV.The world is awash with dangerous budget and fake chargers, so this story might be possible, but not with correctly made chargers. However, it is likely the phone would have died first.Big Clive on Death Wish Chargers...

author: bitwelder
author_rank: Super Contributor
timestamp: August 16, 2023, 05:59:22 am
content: Also, "putting in mouth" could imply "lot of saliva", and that doesn't spell good on many consumer-quality live circuits.
VW id3/id4 flatpack lithium battery module disassembled. - Page 1
Forum section: electronics / general

author: thm_w
author_rank: Super Contributor
timestamp: August 15, 2023, 10:09:30 pm
content: Are those 0603 or 0805 fuses?G should be 750mA rating. So I guess they just go to some balance circuitry?https://www.littelfuse.com/media?resourcetype=datasheets&itemid=4a59f034-1cca-460e-a5ba-e1e66247c76d&filename=littelfuse-fuse-467-datasheet
Samsung Watch SM-845U Charging - Page 1
Forum section: electronics / general

author: Ground_Loop
author_rank: Frequent Contributor
timestamp: August 18, 2023, 01:18:24 pm
content: I found a Samsung SM-845U watch on a trail behind my house that appeared to be in good shape. This trail is frequented by local ATV riders, so I assumed the owner would pass back by at some point. Assuming it is weather proof, I planted a stick painted with dayglow adjacent to the trail and hung the watch on it. Now, three months later a maintenance crew has knocked over the stick/watch and I have claimed the watch as my own. I need charging specs for this thing to attempt to bring it back to life. A standard wireless Qi charger does not respond, but there appears to be charging contacts on the back. Does anyone have knowledge of the expected voltage to these contacts? AC-DC, voltage, current, etc. I tried 5 VDC with no response by either the watch or PS current draw. There is also the likely possibility that the watch is just dead.

author: thm_w
author_rank: Super Contributor
timestamp: August 18, 2023, 08:46:46 pm
content: Says here it supports Qi charging:https://www.gsmarena.com/samsung_galaxy_watch3-10315.phpLooking at photos online I don't see any charging contacts on the back.

author: Ground_Loop
author_rank: Frequent Contributor
timestamp: August 19, 2023, 02:23:15 am
content: It must be dead then. My Qi chargers just blink out faults with the watch on them.
Fulmar Fan alternative - Page 1
Forum section: electronics / general

author: veedub565
author_rank: Frequent Contributor
timestamp: April 29, 2023, 03:34:54 pm
content: Does anybody know where I might be able to source a suitable replacement for an IMC Fulmar fan, Model 00, 115v, 22WattThere's a similar model herehttps://www.ebay.com/itm/121038022569same style but mine is a bit bigger. It's for an HP 8341BNot even sure what this case style is called (apart from tubeaxial) but the shape of the frame is a bit odd.

author: veedub565
author_rank: Frequent Contributor
timestamp: April 29, 2023, 04:04:39 pm
content: Ah think I've found them now, looks like 171mm x 151mm x 51mm 6" Axial Fan. Next step to find a quiet one, 52dB seems to be the quietest so far for an RS Pro one.

author: delat
author_rank: Newbie
timestamp: August 10, 2023, 01:37:48 am
content: Hi! I also plan to replace this FAN. There are several models from 170CFM to 250CFM. Did you figure out flow of the original FAN?

author: thm_w
author_rank: Super Contributor
timestamp: August 10, 2023, 09:05:54 pm
content: Quote from: delat on August 10, 2023, 01:37:48 amI would just get something of similar wattage, 22W was mentioned above. I doubt its that critical.

author: veedub565
author_rank: Frequent Contributor
timestamp: August 11, 2023, 04:07:38 pm
content: Quote from: delat on August 10, 2023, 01:37:48 amYes it's 180 CFMQuote from: thm_w on August 10, 2023, 09:05:54 pmIt can be on these older HP instruments, 3335A, 8340B, 8663A etc. They rely on positive case pressure to force air around inside the unit and through small holes in the RF blocks. Static pressure of the fan is also important, the fan has got to be able to generate some pressure to force the air through.That said, the fans were probably specced with worst case scenario in mind, running 24/7 in a tightly packed rig at 55deg (C) ambient. There probably is some leeway when fitting a replacement for light use at home.In this case I fitted a 130 CFM fan (never did find out the static pressure spec of the OEM one) and everything seems ok so far.

author: delat
author_rank: Newbie
timestamp: August 15, 2023, 03:28:42 pm
content: Hello. Thanks for answers! Bought this FANhttps://www.mouser.com/ProductDetail/670-OA172SAP112TBCan't say it's quieter, but at least it has a new bearing and doesn't make regular weird noises. Its flow is 170 cfm, but the 22/20 watts is very close to the original. But it looks like the original was 3200 rpm. This one has 2300 rpm. The original specification states that at 60Hz-5Hz there is a residual FM equal to the FAN speed.
What "screen" is used for the back-lit light show background on a concert stage? - Page 1
Forum section: electronics / general

author: Deactivated-1
author_rank: Frequent Contributor
timestamp: August 14, 2023, 06:43:22 pm
content: What's the most ideal thing to use as the "screen" on the background of a concert stage, that is gonna be lit form behind with whatever shapes and patterns?And what color is it, matt white? matt black? Are there special cloths that would have minimal bleeding and maximum illuminicity (if that's a word)?

author: JPortici
author_rank: Super Contributor
timestamp: August 14, 2023, 07:02:51 pm
content: Before (until about 2016) it was an array of projectors with particular lenses so they would be placed as far back as possible. These days they are using immense RGBW led panels made of smaller panels (say for example 160x120) linked together, with a controller that streams the video. A lot of leds and one big FPGA per board to handle the signalling of the portion of the image. i think mike (mikeselectrisstuff) works in that area?

author: themadhippy
author_rank: Super Contributor
timestamp: August 14, 2023, 07:51:30 pm
content: Quoterear projection screens

author: Gregg
author_rank: Super Contributor
timestamp: August 14, 2023, 07:51:49 pm
content: A scrim is fairly common theater equipment.

author: themadhippy
author_rank: Super Contributor
timestamp: August 14, 2023, 08:04:15 pm
content: Quotescrims are more for a reveal/disappear effect depending how there lit

author: themadhippy
author_rank: Super Contributor
timestamp: August 14, 2023, 10:06:41 pm
content: Quoteyep and depending on the weave pattern depends on how effective it is,herringbone being about the bestQuoteTrust me,its called rear projection screen material,https://www.projector-screen-material.co.uk/products
Can you identify these chips? - Page 1
Forum section: electronics / general

author: Fungus
author_rank: Super Contributor
timestamp: August 13, 2023, 05:50:35 pm
content: I've no idea where to ask this so here goes...I'm trying to identify these chips and drawing a complete blank. They're in a consumer product from a reputable company and have the TI logo on them so you'd think it would be easy, but ... I got nothing! Not with google, not with the TI part lookup.Any ideas?https://www.ti.com/packaging/en/docs/partlookup.tsp?partmarking=to64https://www.ti.com/packaging/en/docs/partlookup.tsp?partmarking=t064

author: RoGeorge
author_rank: Super Contributor
timestamp: August 13, 2023, 05:57:29 pm
content: TL064?https://www.ti.com/lit/ds/symlink/tl062.pdf

author: Fungus
author_rank: Super Contributor
timestamp: August 13, 2023, 07:26:52 pm
content: Quote from: RoGeorge on August 13, 2023, 05:57:29 pmI'll buy that.There's a 14-pin package with "TO64" marking mentioned in that datasheet.
Vintage electronics warehouse - movie prop supply business - video tour - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: August 12, 2023, 10:19:06 pm
content: Interesting tour of a company in L.A. that supplies vintage electronics to the movie and film industry.

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: August 13, 2023, 03:21:07 pm
content: So now we know where to send all of our old junk rather than the landfill.Not intended to be too snarky, the post is interesting.There is another guy here in Indiana with a pretty big warehouse who supplies the video industry with props. He hangs out at Hamfests and such and looks for good looking equipment, the weirder the better.
New source for RPi 4 boards: Spin Scooters - Page 1
Forum section: electronics / general

author: globoy
author_rank: Frequent Contributor
timestamp: August 07, 2023, 03:45:21 pm
content: And as a bonus you get a big battery, motor and motor controller...https://www.msn.com/en-us/foodanddrink/foodnews/raspberry-pis-found-in-abandoned-spin-scooters-in-seattle/ar-AA1eSd3KLotta compute power for a scooter...

author: thm_w
author_rank: Super Contributor
timestamp: August 08, 2023, 09:32:33 pm
content: Looks like:- Cellular or GPS module - to track the scooter if its lost or for locating one to rent- Camera module - scan QR code- DC/DC board - convert the main battery voltage of ~48V to 5V- Left and right speakers?The newest model has probably gotten rid of the raspi:https://www.spin.app/rides/spin-6

author: globoy
author_rank: Frequent Contributor
timestamp: August 09, 2023, 04:20:32 pm
content: I suppose they used the RPi 4 to get a product out quickly. It's just amusing to me as an embedded systems guy. Probably had people known about this last year then a lot of these scooters would have been raided for parts.

author: tom66
author_rank: Super Contributor
timestamp: August 10, 2023, 09:09:54 am
content: Quote from: thm_w on August 08, 2023, 09:32:33 pmHmm, why would they have a code scanner on the scooter, when every phone in the last decade has a camera? Around here, the codes are just printed on the scooter, and you scan the code with the phone. There's no way to rent them without the phone, I guess, but I'm not sure how having the camera on the scooter helps... can you buy tickets somewhere?

author: thm_w
author_rank: Super Contributor
timestamp: August 10, 2023, 09:15:33 pm
content: Quote from: tom66 on August 10, 2023, 09:09:54 amYeah that seems to be how it works now, you use the phone to scan.Maybe they never used the ability, I can't see what else you'd want the camera for. Unless it records a few seconds of a crash or something.

author: Scrts
author_rank: Frequent Contributor
timestamp: August 11, 2023, 02:57:34 pm
content: Quote from: globoy on August 09, 2023, 04:20:32 pmAnd what would you do with that RPi? Seems like so hyper product, but the vast majority of people just keep them in the drawers...
Classic Template for new technology videos (Humor!) - Page 1
Forum section: electronics / general

author: LaserSteve
author_rank: Super Contributor
timestamp: August 07, 2023, 03:31:30 pm
content: In honor of the LK-99 and Solar Railroad Track controversies, I give you the following:https://youtube.com/watch?v=nyu4u3VZYaQ&feature=shareEnjoy,Steve
UT61E+ & SPE3103 pricing - Page 1
Forum section: electronics / general

author: u666sa
author_rank: Frequent Contributor
timestamp: August 06, 2023, 06:58:48 pm
content: I feel like a fool for ordering UT61E+ in the U.S. for $99 and then having it flown to me with people I know. In Russia the price on this thing is just $65.As a matter of fact, looking back at it, I should have went with the older UT61E.And today I ordered SPE3103 for $80, it arrives August 12th, and in the U.S. price is $130.On the other hand SDS1104X-E that I ordered in the U.S. is $413, here the cheapest is a little above $700.

author: vad
author_rank: Frequent Contributor
timestamp: August 07, 2023, 02:48:47 am
content: https://youtu.be/TkL54oQgf6I
Why does OPUS audio taken from youtube differ in file size every time? - Page 1
Forum section: electronics / general

author: Deactivated-1
author_rank: Frequent Contributor
timestamp: August 04, 2023, 05:41:17 pm
content: Whenever I rip some audio from a youtube video from the 251 stream, which is in the OPUS codec, it is a different file size every time, files taken from the same video can vary from like 2.9mb to 3.2mb, or around that. Why is this? the files all play fine so it's not some weird corruption I don't think. It is 'variable bitrate' but doesn't this just mean that the bitrate isn't constant troughout the whole track, as to conserve memory by not sending a ton of data in for example silent parts of the audio?Or does it mean that the actual streamed audio track changes bitrates depending on internet speed or something like that?If so, would it be possible to manipulate youtube into streaming the highest quality audio it can stream?

author: Jope
author_rank: Regular Contributor
timestamp: August 04, 2023, 06:14:11 pm
content: I get the same size every time withyt-dlp.

author: magic
author_rank: Super Contributor
timestamp: August 04, 2023, 09:42:12 pm
content: Any example video where it happens?TBH I have never tried downloading the same stream multiple times and comparing, but I would surely expect no variation as long as you always use the same format ID.Why would they re-encode the file for each download or keep multiple encodes stored on the server and send them out randomly?(Answering myself: perhaps they re-encode files sometimes (rarely) when something changes and you have just witnessed such an event?)The problem of connection speed is normally solved by using different bitrates, which means different format IDs. 251 is normally the highest quality OPUS available, and 140 is the highest quality AAC. Both are approximately 128kb/s.

author: coppice
author_rank: Super Contributor
timestamp: August 04, 2023, 11:48:39 pm
content: Doesn't YouTube vary the audio bit rate with the video resolution, to give better audio with high resolution video?
The Microspheres Hiding in your Phone's Screen, Anisotropic Conductive Tape/Film - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: August 06, 2023, 03:06:48 am
content: Anisotropic Conductive Tape/Film, a conductive tape in the Z axis only, not in the X/Y axis.See how it works:
ATX PSU testing - Page 1
Forum section: electronics / general

author: amon2_0
author_rank: Newbie
timestamp: July 31, 2023, 04:28:30 pm
content: Whats the name of the guy that tests ATX power supplies online? Has a blog-style website with lots of extensive tests. I totally forgot the name, please help me

author: wraper
author_rank: Unknown
timestamp: July 31, 2023, 04:33:34 pm
content: Maybe you mean JonnyGuru, unfortunately website is dead since Jon moved to Corsair PSU R&D.

author: amon2_0
author_rank: Newbie
timestamp: July 31, 2023, 05:11:41 pm
content: yes, yes I do! Thank youAnyone has a clone of the website?

author: wraper
author_rank: Unknown
timestamp: July 31, 2023, 06:28:07 pm
content: You can try wayback machinehttps://archive.org/web/
Jeri Ellsworth says Dave Jones are opinionated! - Page 1
Forum section: electronics / general

author: MT
author_rank: Super Contributor
timestamp: July 29, 2023, 01:47:34 am
content: Quite interesting show talking about various subjects.

author: MrMobodies
author_rank: Super Contributor
timestamp: July 29, 2023, 02:09:38 am
content: Title:Jeri Ellsworth says Dave Jones are opinionated!Quite a long video but she never saw his slogan?https://duckduckgo.com/?q=eevblog&t=h_&ia=webQuoteUnfortunately I can't see the transcript button to find at what point in the video she said that.

author: bdunham7
author_rank: Super Contributor
timestamp: July 29, 2023, 03:28:43 am
content: Quote from: MrMobodies on July 29, 2023, 02:09:38 am1:47:45No, I didn't watch the whole thing.

author: tom66
author_rank: Super Contributor
timestamp: July 29, 2023, 12:33:23 pm
content: I think calling Dave opinionated is like calling the sky blue - a readily observable fact. I don't think it's an offensive thing to say, it's sort of Dave's brand, I don't think people would watch his videos anywhere near as much if he wasn't like that.

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: July 29, 2023, 09:42:09 pm
content: If Dave did not have an opinion, few, if any. people would watch or listen to him.He is supposed to have an "opinion" , especially when evaluating products.By the way, does Dave have any video criticizing the engineering of the Stonehenge? That would be a good one. Maybe a topic for the Metrology Section.

author: SiliconWizard
author_rank: Super Contributor
timestamp: July 29, 2023, 10:06:56 pm
content: Yeah I haven't watched the whole video but the part around when she says that, and they are not criticizing him whatsoever.How to pick one word from a 2-hour video and make a title. That's what journalists do.

author: xrunner
author_rank: Super Contributor
timestamp: July 29, 2023, 10:18:07 pm
content: She thinks Dave Jones is opinionated?She needs to visit this forum.
Sony hifi Fm stations too loud - Page 1
Forum section: electronics / general

author: deepaksetohul
author_rank: Newbie
timestamp: August 09, 2023, 04:15:56 pm
content: Hello all , I have a sony Mhc-W55 hifi and the problem is that the FM STATIONS are too loud. Does the TCB board have an adjustment to lower the output of the signal . Thanks
Aussie and UK army may go electric bike whit built on rocket launchers! - Page 1
Forum section: electronics / general

author: MT
author_rank: Super Contributor
timestamp: July 26, 2023, 03:30:44 pm
content: https://electrek.co/2023/07/18/british-soldiers-electric-bikes-with-rocket-launchers/https://electrek.co/2021/10/16/watch-australian-soldiers-using-these-50-mph-electric-bikes-on-scouting-missions-video/

author: jonovid
author_rank: Super Contributor
timestamp: July 26, 2023, 04:16:23 pm
content: if they ship it into Europe, it will became just more Lancet target practice.
Why does the spell checker flags so many technical terms - Page 1
Forum section: electronics / general

author: joeqsmith
author_rank: Super Contributor
timestamp: July 24, 2023, 02:01:26 pm
content: I've wondered why the spelling checker on a tech forum flags so many terms. Two from my previous post.coupler'sdirectivity

author: mendip_discovery
author_rank: Super Contributor
timestamp: July 24, 2023, 02:09:35 pm
content: Quote from: joeqsmith on July 24, 2023, 02:01:26 pmFirefox/Grammarly doesn't seem to have an issue with it. Though I have lots of fun as I often make mistakes that I don't spot and even the apps for helping me can make it worse as they assume what I was trying to write. At least I have gotten past every spell checker trying to use -ize instead of -ise.At work, I also get the fun of many of my customers having names that rely on misspellings for the names of the company so I often have to put up with many words underlined in red just because the owner was being clever with the name.

author: tooki
author_rank: Super Contributor
timestamp: July 24, 2023, 05:41:45 pm
content: Quote from: joeqsmith on July 24, 2023, 02:01:26 pmHuh? What spellchecker? The forum doesn’t have one. Your browser does.My browser (in this case, in Safari on iPad, so using the iOS system spellchecker) doesn’t flag either of those words as incorrect.

author: eugene
author_rank: Frequent Contributor
timestamp: July 24, 2023, 06:05:47 pm
content: Quote from: joeqsmith on July 24, 2023, 02:01:26 pmAs tooki said, the spell checker is part of your browser, not the web page.I'm using Firefox. When it flags a word as misspelled that I know is spelled correctly, I right-click on the word and select "add to dictionary" and viola! the word is no longer flagged as misspelled. Sometimes I don't know for sure if the word is spelled correctly or not. In that case I highlight the word before right-clicking and choose "search the internet for [...]" Invariably, Duckduckgo will find the correct spelling. (I avoid all things Google whenever possible.). Then I fix it in my text, and/or add the word to Firefox's dictionary.

author: joeqsmith
author_rank: Super Contributor
timestamp: July 25, 2023, 12:09:03 am
content: Quote from: tooki on July 24, 2023, 05:41:45 pmThanks for pointing that out. Totally missed it. Shut that thing off and all good.
China ban on germanium and gallium - LEDs? - Page 1
Forum section: electronics / general

author: peter-h
author_rank: Super Contributor
timestamp: July 24, 2023, 03:17:19 pm
content: This came in early July 2023.I don't know about germanium (obviously straight germanium semis are old now) but gallium is used in LEDs and I see prices having doubled on some parts.The only LEDs I use are certain Osram (Siemens) types but presumably those are not made in GermanyAlso China makes 90% of the world's supply of gallium.Can LEDs be made from other materials? It appears the answer is Yes but is anyone doing it?

author: themadhippy
author_rank: Super Contributor
timestamp: July 24, 2023, 03:29:44 pm
content: Nice way of sticking 2 fingers up to the rest of the world who have banned exporting to china

author: peter-h
author_rank: Super Contributor
timestamp: July 25, 2023, 11:24:11 am
content: You may say that but one disti's entire LED stock has just vanished.

author: SiliconWizard
author_rank: Super Contributor
timestamp: July 25, 2023, 10:46:42 pm
content: Quote from: themadhippy on July 24, 2023, 03:29:44 pmWe expect banning and sanctioning others and still get what we want from them. That's how it works, right?

author: peter-h
author_rank: Super Contributor
timestamp: July 26, 2023, 01:32:58 pm
content: One doesn't come to EEVBLOG for a lecture of ethics, etcI posted it as a heads-up for anyone using LEDs, but it looks like everybody here has either bought lots of LED stock or nobody is using LEDs

author: Bud
author_rank: Super Contributor
timestamp: July 27, 2023, 10:13:01 pm
content: My Cristmas LED lights should be fine for the next couple years

author: VK3DRB
author_rank: Super Contributor
timestamp: July 28, 2023, 10:55:48 am
content: Such behaviour might backfire on the Chinese side. The West is already looking for sources of rare earth minerals outside China. The problem is this shoud have been done decades ago because putting all eggs in the one risky basket is reckless at best. If it isn't LEDs it will be something else.In any case, this just makes life hard for us electronic engineers who have had a gut full of component shortages. In retrospect, I should have sat om my backside and invested everything I had into Altium in 2011 (9 cents share price) and sold at $45 per share ten years later. Hindsight.

author: ag123
author_rank: Contributor
timestamp: July 29, 2023, 07:36:43 am
content: the other use is solar cellshttps://www.britannica.com/technology/gallium-arsenide-solar-cell
Coolest stereo plug I've seen. - Page 1
Forum section: electronics / general

author: pickle9000
author_rank: Super Contributor
timestamp: July 22, 2023, 09:27:37 pm
content: I don't understand the language but the work speaks volumes.

author: BrianHG
author_rank: Super Contributor
timestamp: July 22, 2023, 09:56:45 pm
content: Perfect ASMR.

author: tooki
author_rank: Super Contributor
timestamp: July 22, 2023, 09:59:20 pm
content: It’s cool machining, but I sure hope he doesn’t intend to use it. The nearly square shoulder of the retention neck could damage certain kinds of contacts in a jack. (It’s supposed to have a significant chamfer.)

author: themadhippy
author_rank: Super Contributor
timestamp: July 23, 2023, 12:04:13 am
content: weres the strain relief to stop it the cable coming detached if the cable gets yanked? I'll stick with neutrik thanks

author: pickle9000
author_rank: Super Contributor
timestamp: July 23, 2023, 12:27:12 am
content: cnc converted lathe and mill, uv cure acrylic, home made chuck lock, super thin lathe cuts, laser cut foam and a wooden carry box.

author: BrianHG
author_rank: Super Contributor
timestamp: July 23, 2023, 03:20:31 am
content: It's just that dandelion. I would have chosen a rose or tulip.

author: Mr.B
author_rank: Unknown
timestamp: July 23, 2023, 03:37:07 am
content: He does some amazing machining.Here is the mostly english channel on his youtube:https://www.youtube.com/@BanjoShow/videosOops... Wrong one... Try this one>https://www.youtube.com/@wmlevsha1133/videos

author: EPAIII
author_rank: Super Contributor
timestamp: July 23, 2023, 10:22:09 am
content: Three words:SwitchcraftNeutrixAmphenolNuff said!
Remote Cotrol - Page 1
Forum section: electronics / general

author: JavedABD
author_rank: Newbie
timestamp: July 23, 2023, 07:27:28 am
content: I have a Garrison, "Oscillating Pedestal Fan". Does anyone know where I can get a remote control for it? Please advise. Thanks.

author: Bryn
author_rank: Regular Contributor
timestamp: July 23, 2023, 09:17:51 am
content: According tothis, it was supposed to come with a remote control. I don't know any places where you'd get just the remote for it unfortunately but I'd contact the seller or company you got yours from to request the remote if possible (because that's what I do regarding missing parts/components for anything I buy online).
What is "saddle margin"? - Page 1
Forum section: electronics / general

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: July 22, 2023, 12:20:08 am
content: Going through this datasheethttps://datasheet.datasheetarchive.com/originals/library/Datasheets-IS31/DSA00605584.pdfI see this claim " has a recording system that puts top priority on saddle margin"Which sounds great but what is "saddle margin"? I've never heard it and googling doesn't give much.I suppose a "saddle" is the shape of some sort of response curve somewhere.

author: ejeffrey
author_rank: Super Contributor
timestamp: July 22, 2023, 02:37:24 am
content: I found this reference:https://en.m.wikipedia.org/wiki/Commodore_1571Something about the worst case data pattern for transition density.

author: Psi
author_rank: Super Contributor
timestamp: July 22, 2023, 02:45:42 am
content: FYI The free ChatGPT version has no idea what saddle margin is.It's good that it said it doesn't know, rather than making something up though.

author: Tomorokoshi
author_rank: Super Contributor
timestamp: July 22, 2023, 03:17:10 am
content: Perhaps it's a translation issue from Japanese to English, where either "saddle margin" was the original Japanese term or it somehow came out of the translation process to English.The emphasis on filter characteristics may be related to the term.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: July 22, 2023, 03:33:35 am
content: Quote from: ejeffrey on July 22, 2023, 02:37:24 amWell that's interesting. I have 2 and half 1571s and I never looked that deeply into them. The "half" 1571 is the one built in to my 128D. They're very reliable drives IME so I never looked that deeply into them.Sooooo I've been helping someone troubleshoot a SFD-1001 drive which packs 1MB on a DSDD disk, but these drives have trouble formatting the higher tracks where I guess the transitions are packed tighter.My working hypothesis is that head wear changes the gap and therefore the frequency at higher tracks.There is almost no information about floppy heads out there. So I've been searching for whatever ICs were used in floppy discs.

author: dmendesf
author_rank: Frequent Contributor
timestamp: July 22, 2023, 03:43:10 am
content: https://www.bitsavers.org/pdf/copal/F-5006_F-5008/F-5006_F-5008_Maintenance_Manual_198507.pdf

author: amyk
author_rank: Super Contributor
timestamp: July 22, 2023, 03:56:58 am
content: Quote from: dmendesf on July 22, 2023, 03:43:10 amMore precisely, page 12.
Need cheap solution to stop inverter overload inductive load - Page 1
Forum section: electronics / general

author: bigjoncoop
author_rank: Regular Contributor
timestamp: July 22, 2023, 12:03:51 am
content: Issue: inverter instantly goes into protection mode when AC compressor kicks onTrying to find a cheap solution to help inverter overcome the large Spike when the compressor kicks on... Such as a soft start I believe.Youtubers Great Scott and electronicsNmore both have videos on a simple circuit to help with such a problem but I'm not 100% sure it will work with this application...Great Scott's soft starter is made of a relay and a mosfet with a few other miscellaneous components.www.instructables.com/How-to-Make-a-Softstarter&electronicsNmore's solution is using a couple of NTC current limiting thermistors.https://youtu.be/1MPW1dqulWwAm I correct in assuming that both of those Solutions only work immediately when the power is first turned on?My air conditioner will first run the fan for a couple of minutes before kicking on the compressor. That is why I'm not sure if I threw those Solutions will work. I might be wrong though...Can anyone else recommend a solution? Basically I need something that can stay in circuit and then provide a "buffer" for a brief second when the compressor kicks on. I was thinking like a large start capacitor on the output of the inverter but I'm just not sure.I know there are soft starters available but they cost a couple hundred dollars

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 22, 2023, 12:38:36 pm
content: Install a "hard start kit" on the compressor. You can also try turning down the voltage and frequency, such that the V/Hz ratio remains the same.

author: Stray Electron
author_rank: Super Contributor
timestamp: July 22, 2023, 01:23:05 pm
content: I'm not sure that anything is really going to help.Invertersjust don't have much reservecurrentcapacity, unlike the AC power line. Motors draw a LOT of amperage when starting. MANY times more than their running current. My first suggestion would be to temporally run your motor from the normal AC power line and to use an amp meter (an analog one, since digitals aren't fast enough) and watch the current draw when you motor starts and that will give you some idea of the kinds of currents that you're dealing with.

author: AVGresponding
author_rank: Super Contributor
timestamp: July 22, 2023, 06:12:56 pm
content: Quote from: bigjoncoop on July 22, 2023, 12:03:51 amWhy would you put the capacitance on the inverter output? If you want to do pfc that way, put it on the compressor motor in parallel. You don't need to achieve a pf of 1.0, just one close enough so that you don't exceed the VA rating.
Looking for DTM1066 datasheet - Page 1
Forum section: electronics / general

author: amir.razzaqi
author_rank: Contributor
timestamp: July 19, 2023, 10:57:40 am
content: Hello guysI'm looking for my faulty Victor VC97 DMM main chipset (marked as "DM 1066" or maybe "DTM 1066") datasheet to repair it. I already found this:http://www.semifree.cn/products/podetail/75.html#poud3and this:http://www.kerrywong.com/blog/wp-content/uploads/2016/04/DTM0660DataSheet.pdfbut both of them are not complete.

author: tooki
author_rank: Super Contributor
timestamp: July 19, 2023, 03:18:39 pm
content: That’s a $30 multimeter. It cannot possibly be worth the time and effort to repair it. Just buy a new meter. That is, if it’s even broken — from the description of the fault in your other thread, I think it’s probably working just fine.

author: amir.razzaqi
author_rank: Contributor
timestamp: July 19, 2023, 09:12:51 pm
content: Quote from: tooki on July 19, 2023, 03:18:39 pmI have two of this multimeter one of them almost completly stop working by itself other one just show large number in millivolt rangeI like to know how this instrument does work just for fun

author: daniellemill
author_rank: Newbie
timestamp: July 22, 2023, 12:04:06 pm
content: Quote from: amir.razzaqi on July 19, 2023, 09:12:51 pmI usually also have two multimeters to test them against each other! But I buy a normal one for $50 and they usually work well))
Is there a generic recipe for adding a wireless debug output to a gadget? - Page 1
Forum section: electronics / general

author: e100
author_rank: Frequent Contributor
timestamp: July 21, 2023, 08:47:58 am
content: As in you would like to monitor some parameter on the gadget, such as battery voltage etc. using Bluetooth or WiFi on a Android phone without having to write a custom Android application to handle the communication?

author: nali
author_rank: Frequent Contributor
timestamp: July 21, 2023, 09:13:19 am
content: There are some predefined BT profiles such as Heart Rate, Battery Voltage which you could emulate then use already availiable apps to monitor.

author: Berni
author_rank: Super Contributor
timestamp: July 21, 2023, 09:17:01 am
content: Present yourself as a Bluetooth serial port, then use a terminal application to show the serial data coming trough it.

author: nctnico
author_rank: Super Contributor
timestamp: July 21, 2023, 03:51:30 pm
content: Quote from: Berni on July 21, 2023, 09:17:01 amI have implemented this for a project and it works like a charm. Extra credits for implementing a command line interface.

author: SiliconWizard
author_rank: Super Contributor
timestamp: July 21, 2023, 09:07:41 pm
content: a BT serial port if you have BT support would probably be the easiest path.Otherwise, if you have WiFi support, you can also send debug info via UDP, much simpler than handling TCP.