hybridfree/eevblog-posts huggingface dataset:
Wireless communication on 60GHz with throughput 1Gbit/s (WiGig) - Page 1
Forum section: electronics / general

author: YTusername
author_rank: Regular Contributor
timestamp: November 22, 2023, 04:46:25 pm
content: Andreas Spiess posted a new video on a wireless technology called WiGig. This technology works in 60Ghz and can achieve a link up to 1.5KM, open-sight, and speed up to 1Gbit/s, with ideal weather. He made an interesting experiment showing the effect of having rainy weather and miss alligned angle between the two points. He compared it with Wi-Fi and explained why it is different than the 2.4Ghz with an interesting history about the wireless frequencies.What do you think about WiGig? Can it be a robust replacement for Ethernet in some cases?

author: madires
author_rank: Super Contributor
timestamp: November 22, 2023, 06:43:34 pm
content: AFAIK, WiGig is primarily meant to be used as short range (in your apartment or office) high throughput WiFi. Microwave PtP links with Gbit/s throughput are nothing new, we had them already 20 years ago. Typically you would get a licence for a dedicated frequency (instead of a shared ISM band) and run your microwave link over several km. A common application is the backhaul connection for celluar base stations, especially in rural areas without glass fiber. BTW, the terminology for 'open-sight' is line-of-sight (LOS), and the opposite is non-line-of-sight (NLOS).

author: mawyatt
author_rank: Super Contributor
timestamp: November 23, 2023, 01:34:22 am
content: Reminds of the early fights within the IEEE of the Ultra Wideband folks, some (Motorola) were on the Impluse Radio side and some (intel) were on the OFDM side. We are approached by Alereon (Tx) to investigate a Log Domain Filter in SiGe BiCMOS to be utilized in Ultra Wideband chip sets being developed, later moving to the 60GHz band. They had a large screen HDTV in their entrance being feed by an early Blue Ray DVD player wirelessly, impressive demo back then!!Think Alereon later were suppliers of the 60GHz chips sets utilized by Linksys.Best,

author: tautech
author_rank: Super Contributor
timestamp: November 23, 2023, 07:56:20 am
content: Nothing special when you can buy this sorta stuff off the shelf from Ubiquiti.60 GHz suffers massive range penalties and 1 Gbit is nothing to get excited about.https://store.ui.com/us/en?category=all-60ghz-wirelessWhereas we have a 11 GHz dish installed solar and wind powered for ISP backhaul over just 10km when it's capable 1.2 Gbit and 300km. LV 24V setup although this big dish requires 48V POE.https://store.ui.com/us/en/pro/category/all-wireless/products/af11-complete-hb
Switchable single-ended/differential ADC circuit - Page 1
Forum section: electronics / general

author: jars121
author_rank: Regular Contributor
timestamp: November 20, 2023, 10:38:02 pm
content: Morning all,Say I have 16 analogue inputs feeding into a 16-channel differential input ADC. I'd like for each analogue input to have +/- connectors to the device to allow for differential measurement, but also allow for single-ended inputs (using the + connector only) as well (via device configuration). Is this a common or serviceable requirement? My initial thought was to use an analogue switch, which either connected the ADC channel's negative (-) input to the (-) connector or to analogue GND. If not, is my best bet to simply provide (for example) 8 differential inputs and 8 single-ended inputs instead?Thanks!
[SOLVED] Data on com port X comes out on com port Y - (both on one USB cable) - Page 1
Forum section: electronics / general

author: eTobey
author_rank: Super Contributor
timestamp: November 20, 2023, 07:04:11 pm
content: Hi there,i got this strange problem, where the data of com port X comes out at com port Y. It also comes out on com port X (as it should).X is a Arduino ProMicro, and Y is a STM Virtual com port. Those two ports are from one USB hub on one cable.It worked before, with only a few issues.Searching for these terms on google is a pain in the a$$. Hope some of you could help me.

author: eTobey
author_rank: Super Contributor
timestamp: November 20, 2023, 07:31:01 pm
content: Well i helped myself:A restart fixed this issue.
Reasonable Safety Precautions With Lithium Batteries - Page 1
Forum section: electronics / general

author: EPAIII
author_rank: Super Contributor
timestamp: November 20, 2023, 03:31:41 am
content: There has been a lot in the News about lithium batteries and the danger of fire with them. I would like to have a discussion about the dangers and the reasonable precautions that would offer some actual protection.So, comments about the dangers, perhaps related to the sizes and types of lithium batteries. Would a coin cell be dangerous in any conceivable circumstances? A AAA cell? When does the size actually bring danger. Have cell phone batteries actually started any fires? I know the auto powering ones have.What about one use vs rechargeable lithium batteries? Is it only the rechargeable ones that can be dangerous? Or can the one use ones also be?And precautions? Containers for charging stations? Can anything stop a lithium battery fire once it has started?I am seriously concerned about this and think that real, accurate information is in short supply.Thanks in advance for any comments.

author: Halcyon
author_rank: Unknown
timestamp: November 20, 2023, 04:27:28 am
content: I have a few thoughts which I practice myself.I never buy batteries or cheap electronics of dubious quality. This isn't just a problem that's restricted to China, although the bulk of those cheap, nasty and dangerous products seem to originate from there. Although good quality "brand name" goods aren't immune to manufacturing defects or poor design, the chance of one exploding into flames is greatly reduced. A lot of the fires that occur are caused by these cheaper products.Aside from my mobile phone and laptop, I never leave batteries charging while unattended.Finally, make sure you home/workspace is well prepared if a disaster does occur. Make sure you have adequate smoke alarms installed and test them periodically. If they are over 10 years old, replace them. Also have appropriate fire extinguishers on-hand (I have 3 large CO2 extinguishers at home). There are also specific water-based extinguishers designed to extinguish a lithium ion battery fire. If you're constantly handling LiPo packs (e.g.: in an electronics lab), have a fibreglass LiPo safe bag or two nearby where you can place damaged packs inside or for use while charging. A metal bin to contain a fire is also a good idea.
"Picture of the week" (from TWiT "Security Now") - Page 1
Forum section: electronics / general

author: eti
author_rank: Super Contributor
timestamp: March 27, 2023, 12:07:33 am
content: Here are some funny examples from "Picture of the week", from TWiT "Security Now" show, hosted by Steve Gibson. Just fantasticGoogle "Security now picture of the week" for endless others

author: henryinsydney
author_rank: Contributor
timestamp: November 23, 2023, 01:16:21 pm
content: They are funny! Isn't there a site that collects all of them for the last few years?
Reporting phishing DM’s - Page 1
Forum section: electronics / general

author: Dan123456
author_rank: Regular Contributor
timestamp: November 17, 2023, 01:14:32 pm
content: Hey all (although probably more of a question to the mods)I got a DM that was a pretty obvious scam message (the good ol’ we won lots of money and want to give you some) and just wanted to check what is the best course of action for reporting these?There is the “report to admin” button but I remember reading somewhere that admins couldn’t see DM’s (I think in the forum rules) so just wanted to check if I need to copy the contents of the DM into the message to the mods along with the persons user name and a note saying phishing / scam attempt etc.?Also, should I keep the “send to all admin” option selected for stuff like this or one of the other options?Sorry in advance! I know you guys probably have much more important stuff to do than dealing with shitty scammers but just hate the thought of someone getting caught out because I didn’t report it!

author: AVGresponding
author_rank: Super Contributor
timestamp: November 17, 2023, 01:58:19 pm
content: Yes, you can report it. They can't see your DMs in normal circumstances but if you report one they can see that one.

author: tom66
author_rank: Super Contributor
timestamp: November 17, 2023, 02:27:57 pm
content: Strikes me as odd that new members (spammers) can even send these PMs. A simple rule that might prevent this kind of spam is prohibiting new members from sending PM's - the privilege might only become available after 10 posts. It wouldn't prevent all spam, but could prevent some of it. I'm not sure if SMF supports this but other forums I've used definitely did have a rule like this.
Does anyone recognise this chip manufacturer logo? - Page 1
Forum section: electronics / general

author: tom66
author_rank: Super Contributor
timestamp: November 13, 2023, 10:55:59 am
content: I believe it's an SoC manufacturer but I can't identify it. Can anyone ID it?

author: ndarjo21
author_rank: Regular Contributor
timestamp: November 14, 2023, 06:01:06 am
content: www.icatchtek.comthis?

author: Rocky_Kid
author_rank: Newbie
timestamp: November 15, 2023, 06:02:02 am
content: please help me too.at the bottom write "G0 PHIL"at the top "469e CAB"Logo on pic

author: tom66
author_rank: Super Contributor
timestamp: November 15, 2023, 11:50:01 am
content: Quote from: ndarjo21 on November 14, 2023, 06:01:06 amAmazing, thanks!

author: wraper
author_rank: Unknown
timestamp: November 15, 2023, 12:32:31 pm
content: Quote from: Rocky_Kid on November 15, 2023, 06:02:02 amManufacturer is Vishay Siliconix. Full picture and description of actual use would be much more helpful for figuring out what it is as even package type is not clear.
Generate PCB ASCII file using AI - Page 1
Forum section: electronics / general

author: Circlotron
author_rank: Super Contributor
timestamp: November 14, 2023, 02:46:25 am
content: So there is text based AI and image based AI. Maybe that's an oversimplification but you know what I mean. Anyway, I wonder of the day will come where you can feed in a written instruction of the details of the PCB you want drawn, and instead of producing an image it comes up with an ASCII text file for the PCB in your chosen format. Then you open it with your favourite PCB editor to check it out and away you go. That would be pretty cool.

author: SiliconWizard
author_rank: Super Contributor
timestamp: November 14, 2023, 04:41:38 am
content: Quote from: karpouzi9 on November 14, 2023, 03:13:00 amPlacement of the "L" letter in this sentence is key.

author: Someone
author_rank: Super Contributor
timestamp: November 15, 2023, 01:26:46 am
content: Already there:https://doi.org/10.48550/arXiv.2303.12712"draw a unicorn"
World Semi LED factory video tour - Page 1
Forum section: electronics / general

author: PlainName
author_rank: Super Contributor
timestamp: November 14, 2023, 02:56:49 pm
content: Interesting that at about 13:40 he says they don't bin rejects but sell them, often at below cost. Which explains where the ultra-cheap stuff on the likes al Aliexpress come from.

author: SiliconWizard
author_rank: Super Contributor
timestamp: November 14, 2023, 11:24:19 pm
content: Quote from: PlainName on November 14, 2023, 02:56:49 pmYes, that and scavenged stuff from binned products.

author: xrunner
author_rank: Super Contributor
timestamp: November 14, 2023, 11:49:26 pm
content: Fascinating. I'm really interested in the machines that are doing all this work now and who manufactures them. It must take a long time to engineer those machines to work so well.
secure your tools - Page 1
Forum section: electronics / general

author: themadhippy
author_rank: Super Contributor
timestamp: November 12, 2023, 03:16:02 pm
content: From very early in my carer i was taught,when working at height to always ensure a dropped tool cant escape,at best your gonna need to climb down to retrieve it,at worst your gonna be retrieving it from someone's head/something very expensive,pity nasa staff didnt get the same training.Quote

author: CatalinaWOW
author_rank: Super Contributor
timestamp: November 12, 2023, 06:18:43 pm
content: Quote from: themadhippy on November 12, 2023, 03:16:02 pmThey probably received many more hours of training than you have. And probably more incentive. It is a LONG climb down. But they work in a really tough environment with lots of things to pay attention to. We can probably just count our blessings in the fact that none of the extravehicular errors to date have killed anyone. They have come close at least twice that I am aware of.

author: TimFox
author_rank: Super Contributor
timestamp: November 12, 2023, 06:39:52 pm
content: There are many accounts of wrenches, etc., dropped down boreholes at oil rigs that had to be retrieved (at very high cost) to use the borehole.One story I remember is that management had a wrench gold-plated and framed to illustrate the retrieval cost.Another article:https://www.mrt.com/business/energy/article/Rookie-sent-packing-after-silence-costs-company-7435664.php

author: Bud
author_rank: Super Contributor
timestamp: November 13, 2023, 06:11:20 am
content: Quote from: themadhippy on November 12, 2023, 03:16:02 pm

author: John B
author_rank: Frequent Contributor
timestamp: November 13, 2023, 06:52:30 am
content: First mistake was taking a 10mm socket with them. They practically have sentience and will wander off on their own, even in zero gravity and vacuum apparently.
Normative and technical documents on the tests of the arc extinguishing chamber - Page 1
Forum section: electronics / general

author: Dodo
author_rank: Newbie
timestamp: November 13, 2023, 03:03:35 am
content: Hello everyoneI am conducting diagnostics of gas switches and there was a question about monitoring the state of the arc extinguishing chamber. I can't find anywhere the documents in which this diagnosis is necessaryIf you know which documents carry information about this diagnosis, please share
Joined-up (tech) thinking - Page 1
Forum section: electronics / general

author: PlainName
author_rank: Super Contributor
timestamp: November 21, 2023, 04:23:16 pm
content: Just caught this on BBC News channel:I wonder how they think a viewer can scan the QR code if they are not already viewing it live.

author: Infraviolet
author_rank: Super Contributor
timestamp: November 23, 2023, 03:48:27 pm
content: As far as a QR code to live streaming goes, maybe they expected still images of the video to be posted on webpages, and wanted to embed something which could let people quickly go from finding a picture (some minutes, hours or days old) to accessing a live webpage.If only the QR code could point viewers to sensible coverage instead, like Carl Heneghan's analysis of the whole ****ed up affair.

author: PlainName
author_rank: Super Contributor
timestamp: November 23, 2023, 08:26:02 pm
content: QuoteYou mean something like this? Nah, never happenQuoteHardly going to be live if it's days or even hours old. In fact, I just tried it and it links to a page saying it's not available.

author: jpanhalt
author_rank: Super Contributor
timestamp: November 23, 2023, 10:50:54 pm
content: Are Smartphones now required to access meaningful comments on this site? Sad.
Firmware Flash Retention - Page 1
Forum section: electronics / general

author: msuffidy
author_rank: Frequent Contributor
timestamp: November 11, 2023, 03:50:47 am
content: If your firmware or BIOS is on flash, does the data risk eventually draining out to the discharge state?Is NOR better than NAND regarding this?Is there any difference between EEPROM and flash?

author: CountChocula
author_rank: Unknown
timestamp: November 11, 2023, 07:02:15 pm
content: Eventually, data on a Flash chipmightbe lost, depending on a number of factors, including the number of write/erase cycles the memory has been subject to. I think (but not 100% sure) that NOR has better retention than NAND, in that it's less susceptible to random bit flips. Manufacturers usually specify data retention in their datasheets (typically 10 years or longer for most modern parts).Flash is a descendant of EEPROMs… for more information,Google is your friend.

author: Siwastaja
author_rank: Super Contributor
timestamp: November 12, 2023, 12:27:15 pm
content: Of course, and data retention lifetime is one of the key parameters to the point of being sometimes mentioned on the very first front page of a microcontroller.
Cooking with Lasers & Living Life Dangerously - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: November 11, 2023, 11:05:51 am
content: running a fullwave microwave oven 3:00 .for the best part the Lasers, skip to 8:00 on the videolooks like an addiction to seeking more & more power.
P-Channel equiv of FS8205A ??  - Page 1
Forum section: electronics / general

author: frogblender
author_rank: Regular Contributor
timestamp: November 09, 2023, 03:31:48 am
content: Anyone have a P-channel equivalent of the famous FS8205A (n-channel dual mosfets, arranged with the body diodes blocking each other.... in case it is not quite famous enough) ?

author: SiliconWizard
author_rank: Super Contributor
timestamp: November 09, 2023, 06:38:08 am
content: I see nothing special with it, apart from the fact it's a dual NMOS with the two drains internally connected.You can do the same with any dual MOSFET that doesn't have its two drains internally connected, just connect them externally.So likewise for a PMOS version, select any dual PMOS with proper characteristics and connect their sources externally if they aren't internally?

author: Chalcogenide
author_rank: Regular Contributor
timestamp: November 09, 2023, 06:52:43 am
content: I was looking for a similar thing and on JLC's part catalog I found the SK3401DM, which is a dual PMOS arranged similarly to the FS8205A. Nothing is internally connected, but the two sources are the center pins of the SOT23-6 so you can just connect them on the PCB underneath the package.

author: frogblender
author_rank: Regular Contributor
timestamp: November 09, 2023, 11:24:40 pm
content: Quote from: Chalcogenide on November 09, 2023, 06:52:43 amI ended up designing in a bunch of DMP1045U (single pfet in a sot23) - mostly cuz I already had it in my library; compared to your suggested SK3401DM, the DMP1045U: takes up double the boardspace; costs twice as much; has less than half the RDSon. It was the RDSon that swayed me, as it'll have to conduct an amp or three.
Brwoser context search is your friend - Page 1
Forum section: electronics / general

author: zapta
author_rank: Super Contributor
timestamp: November 18, 2023, 06:48:47 pm
content: Something I installed recently and thought I should share. Chrome, and probably other browser as well, has extensions to simplify searches on sites you frequent. I am using one called ContextSearch from the chrome extension store (free) and the screenshot below shows how a right click leads easily to search on Digikey, Mouser, and JLCPC PCBA service.
Sorting Forum Search Results - Page 1
Forum section: electronics / general

author: neikalo
author_rank: Contributor
timestamp: November 07, 2023, 09:39:22 am
content: How do I sort the search results so that they are in date order with the most recent post first?

author: Psi
author_rank: Super Contributor
timestamp: November 07, 2023, 09:46:41 am
content: I just tired a search and my results were in that order by default.But I do recall forum search returning results in a random date order in the past. No idea why, but it doesn't appear to be doing that for me atm.

author: magic
author_rank: Super Contributor
timestamp: November 07, 2023, 10:15:06 am
content: Click "search" near Home/Help/Search/Profile/About us/... at the top of the page.Click "advanced search" below the search text box.You will have an option to change sorting order.

author: mendip_discovery
author_rank: Super Contributor
timestamp: November 07, 2023, 03:55:06 pm
content: I have always despised forum search systems. I have often resorted to using google and a site: added in.I have some rather good Google-fu skills but searching a forum is like doing a regx searches in a foreign language.
Diagnostics of the SF6 High voltage switch - Page 1
Forum section: electronics / general

author: Dodo
author_rank: Newbie
timestamp: November 07, 2023, 04:46:42 am
content: Hello everyoneI diagnose the SF6 gas switch by the DRM method. During the diagnosis, it turned out that my arc-extinguishing contacts were damaged. Do you have any photos of examples of the condition of a serviceable and faulty switch contact for comparison?I didn't find anything on the Internet. I will be glad if you help me.

author: jonpaul
author_rank: Super Contributor
timestamp: November 07, 2023, 08:30:42 am
content: Hello: Familiar with SF6 for HV contacts.https://en.wikipedia.org/wiki/Sulfur_hexafluoride_circuit_breakerHave not used the DRM (Dynamic Resistance Method) .I have never seen the photos you seek.Suggest to query the mfg of the SF6 switch for contact photos and diagnosis.As safety, insurance and utilites are involved, STRONGLY suggest you find the local utility, regulatory etcBetter to ask on a T&D forum or electricians professional rather than EEV blog.Research with a good SE like DuckDuckgo. (NOT Google)Bon ChanceJonPS: SF6 is now banned in USA/EU/CA due to very effect on upper atm.Most utilities transmission and distribution HV switches and CB (in the West) are being replaced by vacuum , oil, or air breakers.https://blog.se.com/energy-management-energy-efficiency/energy-regulations/2023/10/05/f-gas-phase-out-has-been-decided-and-is-approaching-fast/

author: Squarewave
author_rank: Frequent Contributor
timestamp: November 07, 2023, 08:32:53 am
content: SF6 is still in use in the UK, in fact Schneider are still supplying us with SF6 in their switches.

author: Dodo
author_rank: Newbie
timestamp: November 07, 2023, 08:57:32 am
content: Hi! Thank you very much, it's a pity that you don't have any photos eitherWe in Morocco are also gradually starting to abandon them and switch to oil switches.Could you drop the links to the forums? Sorry, but I can't find them

author: Dodo
author_rank: Newbie
timestamp: November 07, 2023, 08:59:11 am
content: You won't have a photo of damaged or worn contacts?
Fran Lab has Returned to Building Electronic Projects with this Sputnik Circuit - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: November 06, 2023, 04:08:07 pm
content: I was somewhat disappointed at the lack of electronics diy project building videos in the previous year from Fran Lab.however this video does not disappoint. showing a complete step by stepfive Yearproject build of her Soviet Sputnik Model Project.diy pcb design. the 1950s museum model electronic circuit re-design & testing with vintage transistors. also the process of 3D printing the two part project case.enjoy Fran Lab at Her electronics building best.

author: temperance
author_rank: Super Contributor
timestamp: November 06, 2023, 05:45:30 pm
content: If I exclude myself this must be the most interesting thing I ever saw. What's next? A flashing light based on a highly vintage bakelite push button.

author: iMo
author_rank: Super Contributor
timestamp: November 06, 2023, 07:19:30 pm
content: The next step is to kindly ask Elon to shoot that Sputnik design up on the orbit, perhaps within the first orbital flight of his steel rocket..

author: Squarewave
author_rank: Frequent Contributor
timestamp: November 06, 2023, 07:52:42 pm
content: Wonder what he's going to do with it?

author: coppercone2
author_rank: Super Contributor
timestamp: November 08, 2023, 01:54:40 am
content: i was interested enough to look up how they built the real sputnik.http://www.antentop.org/021/files/sputnik%20_021.pdfmust be built with the latest space tech from captured nazi scientists and prototypes.https://www.radiomuseum.org/forum/sputnik_1_transmitter.html

author: coppercone2
author_rank: Super Contributor
timestamp: November 08, 2023, 03:13:31 am
content: Quote from: iMo on November 06, 2023, 07:19:30 pmif you replace the speaker with bright linearized LED, it could broadcast that signal with audio in such a way that it maybe could be recieved on earth ?. The speaker won't do much good in space.

author: .RC.
author_rank: Frequent Contributor
timestamp: November 08, 2023, 09:10:10 am
content: Quote from: Squarewave on November 06, 2023, 07:52:42 pmHave you not seen the documentary Moonraker.

author: Squarewave
author_rank: Frequent Contributor
timestamp: November 08, 2023, 05:00:49 pm
content: No I haven't.
I Took a year off from electronics to write a Sci-Fi book. - Page 1
Forum section: electronics / general

author: boz
author_rank: Regular Contributor
timestamp: November 05, 2023, 06:11:20 am
content: Cruising towards retirement and the volume of electronics work was starting to dry up so I recently decided to cross one of the things off my bucket list and wrote a science fiction novel. An epic tale of a young woman's journey through the singularity, with 2048-bit carbon nanotube 3D processors and flying saucers thrown in for good measure!It was both easier and harder than I expected, and I learnt a lot from the experience mainly that it needs to be a labour of love and don't give up your day job!I wrote it up here ->https://rodyne.com/?page_id=1252Anyway, back to 8-bit microprocessors and CPS I wasn't sure whether to post this in the dodgy technologies category as most of the tech in the book nails all of the tropes!

author: magic
author_rank: Super Contributor
timestamp: November 05, 2023, 08:37:42 am
content: Good first step, now it's time to start a religion and your work here is done

author: boz
author_rank: Regular Contributor
timestamp: November 06, 2023, 01:53:52 am
content: Quote from: magic on November 05, 2023, 08:37:42 amThanks for the tip, Dianetics would not be a hard act to follow from a literary standpoint, I could just feed a couple of chapters into ChatGPT and ask it to re-write them in the style of L Ron Hubbard.Presto-Bongo "Cult of the Dead Electrolytic" and Tax-free status for life!
Usb to uart/i2c adapters... Interchangeable?  - Page 1
Forum section: electronics / general

author: bigjoncoop
author_rank: Regular Contributor
timestamp: November 06, 2023, 03:37:41 am
content: Hey fellas,So like most of you I'm sure, I've got a ton of different USB to uart/ i2c adapter boards.Ftdi, ft232rl, cp2102, USB to TTL, etc...!!!!I've been looking into this new project and most of the guides I've been able to find mention using a cp2112 adapter to connect USB to i2c.. (SMBus)And some of the guides mentioned that you could also use a Arduino.Just need to connect to the SCL & SDA pads to flash new firmware...SO MY MAIN QUESTION IS, AREN'T ALL THESE ADAPTERS CAPABLE OF DOING THIS BASIC JOB?I realize that each one may have a specific use case in certain situations, and some of them don't have 3.3v and/or 5v outputs, etc...DO I REALLY NEED TO BUY A "CP2112" NOW TO ADD TO MY COLLECTION? 😳

author: ataradov
author_rank: Super Contributor
timestamp: November 06, 2023, 03:55:35 am
content: CP2112 is a USB HID to I2C specifically. None of the other ICs you mention support I2C.So, if the project calls for I2C, you need that IC specifically.And sure, you can use Arduino or any other MCU.

author: NiHaoMike
author_rank: Super Contributor
timestamp: November 06, 2023, 12:32:07 pm
content: Just get a Raspberry Pi Pico if you want a USB to "almost anything" adapter.

author: tooki
author_rank: Super Contributor
timestamp: November 06, 2023, 06:16:37 pm
content: Well, the CP2112 or one of the numerous competing chips.With that said, don’t underestimate the complexity of addressing one of these USB to I2C adapters — it’s not like serial (UART, etc) that just works as a COM port.There’s a reason companies can get away with selling $400 USB-to-I2C interfaces: they’ve written nice software to run what is probably $30 of hardware.

author: SiliconWizard
author_rank: Super Contributor
timestamp: November 06, 2023, 08:28:41 pm
content: Quote from: NiHaoMike on November 06, 2023, 12:32:07 pmYep, ultimately if the OP is ready to do some work - it will need some to get a working solution - a RPi Pico board and some code will get you there with a lot of flexibility.But unless you can find ready-made code (there may very well be, didn't check), you'll have to do some coding work.In terms of FTDI, the ICs that do I2C were already mentioned in another thread, there's also a Microchip one that seems to work well.A word of caution if you're using a FTDI chip for that: it works well but it can be very slow. Especially if you're using a FT232H. I did recommend it earlier for those who want to easily use Python (as it's supported by PyFtdi and that works without a hiccup on all platforms including macOS), but it is extremely slow actually, as every byte transfered needs to be acknowledged and the chip can't do it transparently, so that implies back-and-forth USB transactions for every byte. Awful. It's fine if you have no particular timing constraints though, but avoid it if you do.And back to the OP, none of these solutions are "Interchangeable", so forget about that. There's no standard in USB to I2C converters, contrary to UART.
Identify capacitor brand and series - Page 1
Forum section: electronics / general

author: tony359
author_rank: Frequent Contributor
timestamp: October 31, 2023, 09:05:14 pm
content: Hi all,I'm curious to try to identify what brand a series some SMD capacitors are - I'm repairing some machines where they ALL failed and I was curious to see whether it was bad quality as a start or other factors were involved.Picture attached! Thanks!
Looking for more or less up to date ATX motherboard specifications. - Page 1
Forum section: electronics / general

author: MarkS
author_rank: Unknown
timestamp: October 30, 2023, 02:29:13 pm
content: I did some rather in depth Google searches, but was only able to find the 2.2 specs. I'm looking for motherboard layout and specifically PCI slot locations. The 2.2 spec uses an AGP slot as the datum for the rest of the slots and then references four ISA slots from the AGP slot, from which three PCI slots are referenced. This is not helpful as all three types have different spacings from each different type, slots of the same type and locations from the edges of the board. To make matters worse, it looks like Intel finally killed the formfactors.org site.Does anyone have a better version of the specs they could share?2.2 specs attached.

author: HwAoRrDk
author_rank: Super Contributor
timestamp: October 30, 2023, 04:21:34 pm
content: Does this help?https://www.silverstonetek.com/en/tech-talk/wh11_008There are various diagrams with dimensions, including for DTX that specifically references PCIe slots. You can also find the original DTX specification document (presumably from which the diagram was taken) on archive.org:https://web.archive.org/web/20090824030803/http://www.dtxpc.org/_docs/42197-DTX_Specification.pdfAs I understand it, DTX is a subset of ATX/micro-ATX, with same location mountings, just smaller boards.

author: ejeffrey
author_rank: Super Contributor
timestamp: October 30, 2023, 04:35:56 pm
content: The socket spacing differ between different types of slots based on the socket pin1 location. The location and spacing of the slot openings is the same for every iteration of ATX back to the original AT specification at 0.800 inch. All of the variables are to get the actual slot openings to line up.So from the example given in the ATX 2.2 spec, find a valid location for a PCI socket or whatever other type you care about then add or subtract multiples of 0.8 inch to find other legal locations for that type of socket.

author: HwAoRrDk
author_rank: Super Contributor
timestamp: October 30, 2023, 04:45:18 pm
content: How about the attached?From the PCI Express Card Electromechanical Specification. The current spec documents appear to be on lock-down on the PCI SIG site, but you can find a copy of version 3.0 of the spec here:https://cdck-file-uploads-global.s3.dualstack.us-west-2.amazonaws.com/nvidia/original/3X/2/0/20a75bdbb6bc42db8b2cb0b7c77f3e492a274508.pdfAttached diagram is on page 150.

author: MarkS
author_rank: Unknown
timestamp: October 30, 2023, 05:17:52 pm
content: Quote from: HwAoRrDk on October 30, 2023, 04:45:18 pmThat helped greatly! Thank you!
Is this a real Tesla coil  - Page 1
Forum section: electronics / general

author: Mugiwara303
author_rank: Contributor
timestamp: October 29, 2023, 08:34:42 pm
content: Hi guys, I want to buy this Tesla coil from china but I am wondering if it's output high voltage AC or just DC, It doesn't seems to have a big secondary coil and it outputs big arcs, I just want to make sure it's AC output not DC

author: amyk
author_rank: Super Contributor
timestamp: October 30, 2023, 01:24:30 am
content: Bluetooth? For a copious EMI emitter like that!?

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 30, 2023, 01:31:58 am
content: Quote from: amyk on October 30, 2023, 01:24:30 amYes, that's the Aliexpress/Banggood magic. You can find tesla coils with bluetooth and rechargeable 6LR61 9V batteries with 20Ah.The Alibaba group is called Alibaba for a reason.

author: NiHaoMike
author_rank: Super Contributor
timestamp: October 30, 2023, 01:54:17 am
content: Works surprisingly well given its small size.

author: themadhippy
author_rank: Super Contributor
timestamp: October 30, 2023, 02:22:47 am
content: puny little toys.This is a tesla coilOnly requires 63A 3 phase

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 30, 2023, 02:27:51 am
content: Quote from: NiHaoMike on October 30, 2023, 01:54:17 amWith the phone at just a few cm that seems to communicate. Let's try a few m.It's a fun project otherwise but I fail to really see the point of driving it with audio, could be anything else, as the audible output of this is pretty horrific.

author: Daixiwen
author_rank: Frequent Contributor
timestamp: October 30, 2023, 11:07:12 am
content: Quote from: SiliconWizard on October 30, 2023, 02:27:51 amYou can fix that with some vacuum tubes and gold plated audiophile capacitors I'm sure.

author: BrokenYugo
author_rank: Super Contributor
timestamp: October 30, 2023, 11:21:03 am
content: I think that would be some flavor of "solid state Tesla coil", as opposed to the more traditional spark gap type.

author: Psi
author_rank: Super Contributor
timestamp: October 30, 2023, 11:32:39 am
content: yeah, I got one of them using beans i had on my PCBway account.It's a solid state coil and drives the primary coil direct.Works pretty well for its size.Bluetooth audio connection and a siggen app on your phone is pretty cool, and you can get to a higher frequency doing that than you can with just the freq knob on the front.The tip of the breakout point starts to glow red hot at higher frequencies. Though i'm not sure if that's a good thing, might be overdriving it.Don't expect to get good tesla coil music out of it, it's really only of use with a sig gen app. Maybe wave files generated from midi would work.But any generic audio like youtube vidoes sounds terribleIf you want i can test the BT range.
EAPOL version 2 vs. version 3 - documentation? - Page 1
Forum section: electronics / general

author: Martin F
author_rank: Regular Contributor
timestamp: October 29, 2023, 06:32:40 pm
content: We're looking to implement enterprise WiFi support in our data logger.In the current form, we support the following:EAP-PEAPv0/MSCHAPv2EAP-PEAPv1/MSCHAPv2EAP-TTLS/MSCHAPv2We do not support EAP-TLS, however, at this stage (i.e. we do not support client certificates, only server certificates).Within our current support, we would expect to be able to connect to a specific Cisco WiFi router, but we are getting an issue related to the 'EAPOL version'. The WiFi router seems to require EAPOL 'version 3', while our device's WiFi module only supports 'version 2'. We are using a WINC1500 from Microchip.We seem unable to find further details on the exact difference between 'version 3' and 'version 2', other than other forum posts highlighting that a mismatch will indeed cause a device to be unable to connect. For our use case, it is not a solution to change settings on the WiFi router, hence we need to change our implementation to also support 'version 3'.Anybody has additional details on these version differences?

author: bingo600
author_rank: Super Contributor
timestamp: October 29, 2023, 08:09:23 pm
content: A bit herehttps://community.cisco.com/t5/wireless/how-to-enable-eapol-version-2-for-wpa-enterprise-network/td-p/3864832
SiFive is downsizing :( - Page 1
Forum section: electronics / general

author: DC1MC
author_rank: Super Contributor
timestamp: October 25, 2023, 03:08:00 pm
content: Maybe China will pick the pieces:https://www.tomshardware.com/news/sifive-lays-off-hundreds-of-risc-v-developershttps://morethanmoore.substack.com/p/the-risk-of-risc-v-whats-going-on

author: tunk
author_rank: Super Contributor
timestamp: October 25, 2023, 05:39:13 pm
content: There's already a thread about this:https://www.eevblog.com/forum/chat/whats-up-with-sifive/?topicseen

author: DC1MC
author_rank: Super Contributor
timestamp: October 25, 2023, 05:40:17 pm
content: Ups, didn't see it, mods kindly please delete this thread.
Fun ICs to cross section? - Page 1
Forum section: electronics / general

author: JohnDMcMaster
author_rank: Newbie
timestamp: October 22, 2023, 07:19:43 pm
content: Hi all! I'm cross sectioning ICs and looking for suggestions for weird / interesting ICs, especially if they are "large" process technology (ideally 90+ nm). Sample here:https://twitter.com/johndmcmaster/status/1715863105782378529
Very old electrical switchboards - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: October 17, 2023, 07:39:46 am
content: I thought I'd share this here for fans of old electrics. This was taken a few months ago in a 130+ year old building in Sydney. I don't want to give away the exact location, but the ground floor is all commercial premises and a restaurant, while upstairs is all residential units.Obviously the switchboard wasn't here when the building was built and aspects of it have been added to over time to result in this mess. About a month later, it was all completely ripped out and replaced.There are elements of this which would no longer comply with today's standards and the old mains busbars (if you can call them that), in the black boxes as so old they are stamped with "Sydney County Council" on them, which existed between 1935 and 1990.Apologies about the clarity. This was taken on my phone and the lighting was horrible.

author: SeanB
author_rank: Super Contributor
timestamp: October 17, 2023, 10:55:55 am
content: Few generations of Email meters there, probably dating at least from the 1970's as well. Yes you can see generations of quick fix upgrades there, installed by electricians who ranged from DILLIGAF to just merely zoned out.

author: TimFox
author_rank: Super Contributor
timestamp: October 23, 2023, 07:46:23 pm
content: At least the breakers are legibly labeled.When my former employer moved into a new building, the circuit breakers bore labels such as "Emily's Office".Not only did Emily leave the company, but the walls were re-arranged later so that her office disappeared.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: October 24, 2023, 01:05:07 am
content: When reading that title 'Very old electrical switchboards', I did expect something like the following pictures, i.e. marble and 'Frankenstein-switches'.

author: TimFox
author_rank: Super Contributor
timestamp: October 24, 2023, 01:25:43 am
content: I don't have a picture, but I remember an antique x-ray controller in the museum in Linköping, Sweden, where all the high-voltage switches, etc. were mounted on a marble slab.
Vidar precision resistors? - Page 1
Forum section: electronics / general

author: Stray Electron
author_rank: Super Contributor
timestamp: October 18, 2023, 03:18:10 pm
content: I picked an old circuit board recently that has a large number of 0.1% tolerance resistors made by Dale (MFF series), some marked BA-6 (yellow bodies with black markings) and others made by Vidar" (black bodies with white markings). Dale I recognize and they've been bought out by Vishay but I can't find anything about their MFF series and I can't find anything about who BA-6 is or anything about Vidar. Is anyone familiar with these companies and their products? My guess is that this dates from the 1970s.I don't know how old this board is and there are no ICs on it. The transistors (mostly 2N3053s) on have the number 435 on them which might be a date code but they're all made by RCA and I can't find a RCA data sheet that explains their transistor markings.

author: Vgkid
author_rank: Super Contributor
timestamp: October 21, 2023, 03:26:35 am
content: Take some pics.
Good books/reading material on SMPSU and protection circuitry design. - Page 1
Forum section: electronics / general

author: Traceless
author_rank: Frequent Contributor
timestamp: December 10, 2022, 01:43:14 pm
content: Hi everyone,I'm currently looking for some good books on switching power supply and protection circuitry design. I found a couple of books on the topic. Some of them are rather pricey so I'm curious if anyone knows one or more of those books or can recommend other good or even better ones (I'm looking for something that in the style of "The Art of Electronics" basically starts at zero and then goes over the entire subject).Fundamentals of Power ElectronicsTransformers and Inductors for Power Electronics: Theory, Design and ApplicationsSwitching Power Supplies A - ZSwitching Power Supply Design (by Abraham I. Pressman, Keith Billings, Taylor Morey)Designing Control Loops for Linear and Switching Power Supplies: A Tutorial GuideSwitch-Mode Power Supplies: SPICE Simulations and Practical DesignsSwitching Power Supply Design & Optimization (by Sanjaya Maniktala )I'm also interested in voltage, current and resistance measurement circuitry design but there seems to be a lot less material on the subject (or maybe I'm just searching for the wrong terms). I found those two books so far:Voltage References: From Diodes to Precision High-Order Bandgap CircuitsLow Level Measurements: Precision DC Current, Voltage and Resistance MeasurementsDuring my search I stumbled upon this nicedocument on Simplifying Current Sensingfrom Texas Intstruments which is available for free on their website, in case anyone is interested.

author: Benta
author_rank: Super Contributor
timestamp: October 16, 2023, 10:47:07 pm
content: This one from ON Semiconductor is good for starting:https://www.onsemi.com/pub/Collateral/Smpsrm-D.PDF
LiDAR Velodyne Velarray Solid State Sensor M1600 Flooding The Market! - Page 1
Forum section: electronics / general

author: BiD
author_rank: Contributor
timestamp: October 16, 2023, 10:34:09 pm
content: Hello,I remember contacting Velodyne regarding M1600 solid state LiDAR about a couple years ago wrt to low-volume price and they wanted >>$10K. It looks like somethings happening, there's many of them flooding eBay:https://www.ebay.com/sch/i.html?_from=R40&_nkw=Velarray+M1600&_sacat=0&LH_TitleDesc=0&_sop=15some of which are going for under $200! I've purchased some of them(VEL-005-B114) and they're pretty nice!
MONITOR AUDIO RADIUS 370 PARTS INFORMATION NEEDED - Page 1
Forum section: electronics / general

author: HIFI LOVER
author_rank: Newbie
timestamp: October 08, 2023, 03:41:38 pm
content: Hello,have a subwoofer Radius 370 Monitor Audio.Primairy powersupply is brokenany body has a sesrvice manual or schematics for this unit?If Not, does anybody know what type of diode is D21?Thx for answering!

author: Benta
author_rank: Super Contributor
timestamp: October 08, 2023, 07:41:22 pm
content: Sorry, no.But:DON'T SHOUT!

author: TimFox
author_rank: Super Contributor
timestamp: October 08, 2023, 07:42:58 pm
content: Or wave it aboutOr the rest will be wanting one too.--Edward Lear

author: temperance
author_rank: Super Contributor
timestamp: October 08, 2023, 08:54:46 pm
content: Obviously the way you announce the topic and the topic content doesn't bring you the attention you seek.Some suggestions:-Change to the topic title in small letters.-Add content to your question such as:-Where is D21. A picture will help a lot.-Are there other parts broken.-What are the symptoms?-What did you achieve till now? Without a schematic some reverse engineering will be required to find out what D21 might be. Did you try to do that? Or are you just looking to replace some burned components in an SMPS hoping it will power up again when you plug in the unit while hiding under the table just in case things go wrong?

author: HIFI LOVER
author_rank: Newbie
timestamp: October 16, 2023, 03:13:37 pm
content: Hello, i am just new and excited to hear from somebody, did not know that it would look like i am shouting.Thanks for the reply

author: HIFI LOVER
author_rank: Newbie
timestamp: October 16, 2023, 03:18:28 pm
content: Hello Everybody,i found out that there are several versions available from this unit.D21 is a DIAC type DB-3so my Problem is solved,Thanks everybody for any reply on this topic
Sony APS-211 42V power supply - Page 1
Forum section: electronics / general

author: Little-Sparky
author_rank: Newbie
timestamp: October 13, 2023, 03:10:13 pm
content: I'm trying to increase output voltage on this apparatus/device. I would like to increase it to 53.5 volts so I can run a 4pill LD mosfet amp by DXworld. Any advice, looking for a Variable resistor to adjust like on most little power supplies. or is it more complicated like removing a resistor with a lower ohm rating? Any ideas. GaryLordsWay@aol.com thanks Gary.

author: DavidAlfa
author_rank: Super Contributor
timestamp: October 13, 2023, 03:17:50 pm
content: Tweaking the feedback circuitry will probably do that, but we can't magically guess how!How about some pictures?

author: Little-Sparky
author_rank: Newbie
timestamp: October 17, 2023, 02:07:53 pm
content: I think I have it figured out I have tow options and one is to trick the IC return signal and make it think it is low and have it increase out put voltage by trickery or use a DC/DC buck converter circuit to get my voltage up to where I need it to run my device I am building to run on the power supply. But I do have a way to get what I need done figured out.

author: tom66
author_rank: Super Contributor
timestamp: October 17, 2023, 02:50:24 pm
content: Increasing the output voltage will be more practical than building a boost converter, assuming you need the 1500 - 3000W or so that this power supply is capable of providing (highest power output available if the input voltage is >200Vac).

author: NiHaoMike
author_rank: Super Contributor
timestamp: October 20, 2023, 12:09:04 am
content: Can also consider adding a 12V server PSU in series with the output, will probably work better than trying to change the output voltage by a fairly large amount.

author: tom66
author_rank: Super Contributor
timestamp: October 20, 2023, 10:01:54 am
content: Quote from: NiHaoMike on October 20, 2023, 12:09:04 amAlmost certainly a power supply of the scale required would be earthed at the negative DC output, so you would need to defeat the mains earthing of one power supply or the other, which is a bad idea for lots of reasons.
The Fake Chip Scourge - Page 1
Forum section: electronics / general

author: Black Phoenix
author_rank: Super Contributor
timestamp: February 13, 2023, 12:37:32 am
content: https://youtu.be/7epnv43jGV8

author: Neutrion
author_rank: Frequent Contributor
timestamp: October 13, 2023, 04:04:35 pm
content: Interesting video, from a really great channel it seems.So many questions regarding this topic!Is this faking industry known to the governments where it happens? Was this the reason China stopped importing so much E-waste? Or they don't mind it at all?Are there any reliable refurbished chip souces? It seems to me, it might could eventualy be economical to do it properly.How about chinese manufacturers of electronics? Do they avoid the fake chips or use them intensely without much problems?Are the fake chips usually get recognized during production, or maybe significant numbers slip through to final products?