hybridfree/eevblog-posts huggingface dataset:
The end of electronics is coming - spintronics - Page 1
Forum section: electronics / general

author: u666sa
author_rank: Frequent Contributor
timestamp: July 09, 2025, 02:16:20 pm
content: Using electron charge to store and process data is coming to an end, new devices are being developed that work on completely different physical principles. Instead of electron charge, why not use electron spin. There is no need to move electrons anymore, thus no heat, no time, no energy required.

author: Grandchuck
author_rank: Super Contributor
timestamp: July 09, 2025, 04:18:06 pm
content: As with fusion reactors, a future technology that always will be? (OFF IN THE FUTURE)

author: Marco
author_rank: Super Contributor
timestamp: July 09, 2025, 05:28:39 pm
content: Are there any non trivial spintronic logic ICs?Adiabatic superconducting logic has an actual micro ... spintronics has got what exactly?

author: themadhippy
author_rank: Super Contributor
timestamp: July 09, 2025, 05:32:54 pm
content: Will this spinythingy be appearing before or after we all have fusion powered quantum computers on our desks?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: July 09, 2025, 06:07:11 pm
content: Quote from: u666sa on July 09, 2025, 02:16:20 pmhttps://en.wikipedia.org/wiki/Landauer%27s_principle

author: Marco
author_rank: Super Contributor
timestamp: July 09, 2025, 07:54:27 pm
content: Landauer's principle is not necessarily relevant, it makes more sense to switch to reversible gate logic with these exotic switches.

author: temperance
author_rank: Super Contributor
timestamp: July 10, 2025, 12:55:42 am
content: This doesn't mean the end of electronics. It means the end of moving charges around for storing bits. But some charge is still required but much less charge is needed to store one bit. Another advantage is that they retain their state when power has been removed, and you don't need refresh cycles like in DRAM memories.

author: Analog Kid
author_rank: Super Contributor
timestamp: July 10, 2025, 01:56:03 am
content: I'll wait until DigiKey has those newfangled Ai1 (All-in-one, processor + memory) chips available in quantity, thank you very much.
UL 497A vs UL 497B – Are These Surge Protectors Interchangeable? - Page 1
Forum section: electronics / general

author: tarun172
author_rank: Regular Contributor
timestamp: July 07, 2025, 01:15:11 pm
content: Hi, I’d appreciate a knowledgeable critique of my understanding of UL 497-rated devices.I’m replacing an obsolete UL 497A-rated device. The manufacturer recommends a UL 497B-rated part with a higher surge rating, but I’m not convinced they’re interchangeable.UL 497A is intended for secondary protection, typically located near the protected equipment. Devices in this category are tested for lower surge levels and are designed to coordinate with upstream primary protectors.UL 497B is intended for primary protection, usually at the service entrance, and is tested to handle higher surge currents.Therefore, the devices are not automatically interchangeable. There are additional considerations such as clamping voltage, let-through energy, and impedance matching, but I’m keeping this explanation simple.Am I misunderstanding anything?Thanks,Tarun

author: thm_w
author_rank: Super Contributor
timestamp: July 09, 2025, 11:48:06 pm
content: You need to be more specific, what is the original part and what is the part they are suggesting to replace it with?This site is saying 497B is a lower tier of protection:https://store.chipkin.com/articles/ethernet-cable-section-consider-the-ul-listing-nec-requirements
NI, Test & Measurement Business Group, Emerson Survey - Page 1
Forum section: electronics / general

author: joeqsmith
author_rank: Super Contributor
timestamp: July 08, 2025, 04:23:49 pm
content: Anyone else getting spammed by Emerson looking for feedback? I keep adding them to my ignore list. At home, and from work, we ditched NI (as they now identify themselves) when they tried to extort their customers with their forced subscription model. Where I work, I doubt we would ever go back as there is going to be zero trust anymore.Quote

author: floobydust
author_rank: Super Contributor
timestamp: July 08, 2025, 05:07:59 pm
content: That survey - they could have given out a free key fob or coffee cup or poster lol. Remember those days?We dumped National Instruments years ago. The greed and profiteering was so much that it actually paid off to recode using other vendorsDAQFactoryfor our test fixtures. The new president promotes female leadership and she has a different approach. Customer-centric is going to be very difficult to go back to something like that when all the MBA's care about is the $revenue.It seems common that a good thing becomes surrounded by useless people, even Altium got fat and obese too. The incessant need for greater profits and "growth" means milk the cow harder, oh the cow died just get another one or squish it more.Then the company gets acquired and all new leadership steps in - clueless about what built/made the company what it is. Clueless about the actual business. Preoccupation is with increasing the numbers. Oh let's reconnect with our customers that had the shirt ripped off their backs. Yeah good luck with that lol.

author: UnijunctionTransistor
author_rank: Frequent Contributor
timestamp: July 08, 2025, 05:28:33 pm
content: I would take the opportunity provided by the survey to give them the well deserved *negative* feedback.

author: floobydust
author_rank: Super Contributor
timestamp: July 08, 2025, 06:14:34 pm
content: It doesn't matter because they've got a monopoly with their software and some of their hardware. A company will be staying with them regardless of them gouging customers.Profit is what matters to Emerson. How can we get more money out of our customers? MBA's love forced subscriptions, recurring revenue etc.

author: UnijunctionTransistor
author_rank: Frequent Contributor
timestamp: July 08, 2025, 08:15:35 pm
content: I get that;But at least you can vent your frustration with whom it belongs: NI/ Emerson. I appreciate that you shared your frustration with us, but you are preaching to the converted crowd.So….The message you posted above, just clean it a little bit and let them have it.My two yen, FWIW.
Software on EEVblog? - Page 1
Forum section: electronics / general

author: the_torch
author_rank: Newbie
timestamp: July 08, 2025, 01:17:58 am
content: I am curious if there is or would be a space to talk software for embedded systems here on EEVblog? It seems like it's a valuable enough topic to have on here. So far I haven't seen an area dedicated to this, but would love to at some point! Any thoughts or opinions would be greatly appreciated.

author: Psi
author_rank: Super Contributor
timestamp: July 08, 2025, 01:43:04 am
content: The microcontroller section has the following description:"Microcontroller hardware or software. Use the Embedded Computer section for single board computers like RPi etc"The 'Embedded computer' section is a 'child board', so can be a bit hard to find.Child boards are listed at the bottom of each section on the main page. Embedded is listed in the "Products" section.https://www.eevblog.com/forum/embedded-computing/So that would be the best category imho.

author: RoGeorge
author_rank: Super Contributor
timestamp: July 09, 2025, 09:13:46 am
content: Yes, there are such places here.From the main page, scroll down to see a section named Computers:https://www.eevblog.com/forum/general-computing/with its subforums for Embedded, Vintage, Programming, Networks and Wireless, Security, and Chat GPT/AI.

author: SteveThackery
author_rank: Super Contributor
timestamp: July 10, 2025, 03:49:59 pm
content: Quote from: RoGeorge on July 09, 2025, 09:13:46 amIndeed. But actually I have sympathy for the OP's question. I wonder if one or more of those sub-sections would be better promoted to the top level. Just a thought.
What's up with the NI GPIB-USB-HS? - Page 1
Forum section: electronics / general

author: bat
author_rank: Regular Contributor
timestamp: July 07, 2025, 08:26:03 am
content: I have recently noticed that there's thousands of NI GPIB-USB-HS being sold for dirt cheap, as low as 30€ sometimes, on Ebay...My friend even bought some for his workplace, they look legitimate, they got the DVD instruction and accurate serial numbers...I wonder if those bootleg GPIB USB even work

author: stretchyman
author_rank: Regular Contributor
timestamp: July 07, 2025, 09:18:52 am
content: Yes, bought one, works fine.GPIB not use professionally anymore?I use it, it's fine!They were VERY overpriced in the first place and either there's a load of old stock or even cloned?J.

author: bat
author_rank: Regular Contributor
timestamp: July 07, 2025, 10:28:20 am
content: Oh yeah, NI really profited from these... Tbh i'm happy to see them sold at very low costs because they cost like 9$ or less to produce.Perhaps some Chinese folks retro engineered their products to sell them back.

author: stretchyman
author_rank: Regular Contributor
timestamp: July 07, 2025, 12:56:31 pm
content: I use a program called SOFTPLOT, GPIB'd into ALL my instruments, even power meter (over time).Splendid, I ask for no more!J.

author: bingo600
author_rank: Super Contributor
timestamp: July 08, 2025, 06:21:34 pm
content: It just went officially EOLMaybe last chance to sell a clone ....

author: bat
author_rank: Regular Contributor
timestamp: July 09, 2025, 10:09:34 am
content: How do you know it's now EOL ?Is it because Emerson bought NI and sell another version of the GPIB USB HS ?

author: the Chris
author_rank: Regular Contributor
timestamp: July 09, 2025, 10:27:57 am
content: My guess: with many people switching to Win 11, more buyers will need to use the newer versions of the NI software instead of the one supplied on the CD alongside the adapter. And the newer versions detect and block the interface clones. So they try to get them off the shelves before the return quote rises.

author: pdenisowski
author_rank: Super Contributor
timestamp: July 09, 2025, 11:35:08 am
content: Quote from: stretchyman on July 07, 2025, 09:18:52 amWe (R&S) still have quite a few customers using GPIB and still offer GPIB adapters on most of our instruments. Even our brand new cutting-edge FSWX dual-channel spectrum analyzer just released last month has GPIB as an optionAnd as for cheap NI GPIB-USB adapters - yeah, those are pretty cheapThe ones that support the GPIB analyzer functionality (vs. just basic communications) seem to still be close to the "normal" price

author: thm_w
author_rank: Super Contributor
timestamp: July 11, 2025, 09:45:43 pm
content: https://www.eevblog.com/forum/testgear/ni-gpib-usb-hs-issues-no-original-fake-hack/https://www.eevblog.com/forum/testgear/ni-gpib-usb-hs-265350/https://www.eevblog.com/forum/testgear/flood-of-new-agilent-82357b-gpib-usb-adaptors-on-ebay-the-real-deal/

author: bingo600
author_rank: Super Contributor
timestamp: July 12, 2025, 01:12:45 pm
content: Quote from: bat on July 09, 2025, 10:09:34 amhttps://knowledge.ni.com/KnowledgeArticleDetails?id=Quote
What's your application focus in electronics? - Page 1
Forum section: electronics / general

author: freethrow
author_rank: Newbie
timestamp: July 03, 2025, 01:30:20 pm
content: Electronics, by itself, isn’t really an “application”—it’s a broad field. Many people get into electronics because they’re fascinated by specific areas. Some love radio and RF, others are into audio, and so on...So, I’m curious: What’s your main application focus when working on electronics projects?P.S. I’m mainly asking about the hobby side of things here. Of course, at work it's a totally different story.

author: hans
author_rank: Super Contributor
timestamp: July 03, 2025, 04:38:26 pm
content: Home automation. Sensors, actuators, hub, etc. Also the software side can be fun if you like logging and plotting data, integrating in home assistant, etc.Addons for my simrig (flight and simrig). At its simplest these are button boxes, or graphical panels/dashboards, but now working on my own force feedback controllers."Saving money" by building my own test equipment so I can build more projects of stuff I could have simply bought off the shelf. /SAlthough admittedly I'm not much into the test equipment anymore. A decent 30V 3A PSU with digital control is only 60$ now.. I don't think I could even get a transformer, rectifier and caps for that money.

author: RJSV
author_rank: Super Contributor
timestamp: July 03, 2025, 10:44:05 pm
content: freethrow, thanks for the question !I developed a love for so-called MECHANICAL analogs, to the contemporary electrical devices, in mass systems using 30 k plus quantities, like in a microprocessor.Good for teaching, but it's just basically FUN, to design and build my own little logic device, such as for counting (Increment / Decrement). A read and clear 'logic gate' was fun in a similar sense, as in the popular LEGO construction set toy.Of course I have 'commercial' interests, there; attempting to promote my own products and devices.(Also check out US 20030172205 at 458 pages a 'jumbo' patent application). (Narcissistic individual, sorry).- - Rick Jack

author: themadhippy
author_rank: Super Contributor
timestamp: July 03, 2025, 11:13:42 pm
content: QuoteGiving freedom to the magic smoke being held captive.

author: hfleming
author_rank: Regular Contributor
timestamp: July 03, 2025, 11:30:55 pm
content: As for me, hobby- and professional-wise have always been aligned… first I started off with RADAR and X-Rays, then went for a while into industrial electronics (SCADA and robotics), then I went for a long time into RF and avionics R&D, and then for a while into TV-stuff, and then, due to personal issues, medical stuff (helped by the fact that I also studied medical physiology and zoology part-time). Now that I am retired, I just do whatever takes my fancy, which vary from day to day…
(This mechanism shrinks when pulled) Ok nerds, replicate this in a circuit. - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: July 01, 2025, 01:59:56 pm
content: I'm talking about the springs and ropes at the beginning of the video.I know it will look like 2 resistors (springs), switch as the string between the resistors and 2 diodes (slack ropes) with a current sink (weight) and volt-meter...Bigger test, how would you replicate the final circuit equivalent at 17 minutes, without using a simple Shockley diode...

author: SteveThackery
author_rank: Super Contributor
timestamp: July 01, 2025, 03:07:42 pm
content: So I guess any kind of negative resistance?

author: ejeffrey
author_rank: Super Contributor
timestamp: July 03, 2025, 04:29:26 pm
content: The parts I saw looks more like a latch. As you increase the force it gradually extends until a latch "trips" and releases a stored spring energy pulling back.The mechanical versions are one-shot because negative resistance performs work. In a passive system that can only be from stored energy and once release it's done until reset. With a driven system like a parametric driven oscillator you can continuously add energy and have continuous negative resistance.

author: Terry Bites
author_rank: Super Contributor
timestamp: July 04, 2025, 01:08:13 pm
content: A generalised impedance converter?The GIC is bit of EE magic.

author: Picuino
author_rank: Super Contributor
timestamp: July 05, 2025, 10:59:24 am
content: Falstad circuit simulation.Simple negative resistance circuit.Current = Pull forceVoltage = Position
ADPMC2211 PCI mezzanine card from Advanet - Page 1
Forum section: electronics / general

author: epolicar
author_rank: Newbie
timestamp: June 27, 2025, 03:51:43 am
content: Hello everyone,I hope this is the appropriate subforum.Does anyone have the schematic of this PMC board ADPMC2211 PCI mezzanine card from Advanet? The board is already EOL but the ATE on which it is used is still very much in operation. Customer is not willing to buy those available in eBay; exorbitant price. They want to build new boards.
Check mate - Page 1
Forum section: electronics / general

author: PerranOak
author_rank: Frequent Contributor
timestamp: June 24, 2025, 03:20:22 pm
content: Can anyone recommend a straightforward chess app for iOS please?I don’t want to play online just sit on my @rse and play a few half decent games against the iPad.Cheers.

author: ataradov
author_rank: Super Contributor
timestamp: June 24, 2025, 04:20:53 pm
content: Stockfish has apps for any platform -https://stockfishchess.org/download/It is a local chess engine with the interface. I don't know how any of those things deal with difficulty adjustment though. SF is the strongest engine today, so playing it raw makes no sense, you will always lose.Otherwise, just play against the engine on lichess. It requires internet connectivity, but no human interaction. That has adjustable levels.

author: brucehoult
author_rank: Super Contributor
timestamp: June 25, 2025, 01:54:04 am
content: GnuChess has been available on iOS pretty much from the very start, and gives you a bit more of a chance than StockFish.But all chess programs, even the weakest, brutally punish missing 2 move tactics  in a way that humans don't, making them frustrating unless you're fairly good, or make them play totally brain-dead e.g. 1 ply. unguarded pieces, overloaded defenders, pins & forks, attacks enabled via a check ...

author: coppercone2
author_rank: Super Contributor
timestamp: June 25, 2025, 06:49:24 am
content: the chess computer in system shock remake delta grove area is pretty good

author: jonpaul
author_rank: Super Contributor
timestamp: June 25, 2025, 07:27:39 am
content: see Claude Shannon 1960s Sci Am article on a Chess Playing Machinej

author: PerranOak
author_rank: Frequent Contributor
timestamp: June 25, 2025, 10:32:30 am
content: Beauty, cheers all.
Vera C. Rubin Observatory - Page 1
Forum section: electronics / general

author: iMo
author_rank: Super Contributor
timestamp: June 24, 2025, 05:35:21 am
content: First pictures after 10y of construction just released..8.4m telescope, 3.2Gpixel camera, 20TB data per night..https://en.wikipedia.org/wiki/Vera_C._Rubin_Observatory

author: brucehoult
author_rank: Super Contributor
timestamp: June 24, 2025, 09:24:39 am
content: Ahhh ... gotta love LLMs.The Vera Rubin pictured with the violin used to play with the NZ Symphony Orchestra and (being from Tashkent) made a mean Plov for her dinner parties.I assume the one on bottom right has more relevance to astronomy.A friend once asked ChatGPT to write a bio for me for a conference and was surprised to learn that I helped found ARM.

author: iMo
author_rank: Super Contributor
timestamp: June 24, 2025, 04:34:06 pm
content: I wonder how they want to process all the data.60TB of data every three days will be spit out for the next 10 years, they say.Perhaps "Vera@home"?

author: KE5FX
author_rank: Super Contributor
timestamp: June 24, 2025, 06:29:44 pm
content: Quote from: iMo on June 24, 2025, 04:34:06 pmIt's kind of interesting... from what I've read, the raw data travels via fiber from Chile to a US government installation in California where it is reviewed for any tracks of classified satellites. The data is then released to the researchers after a mandatory delay on the order of 60 seconds(?), and can be made available to the general public after something like 80 hours.

author: iMo
author_rank: Super Contributor
timestamp: June 24, 2025, 06:53:43 pm
content: .. and the github with all you may need to process the entire Universe at home..https://github.com/lsst/
ads1262 test - Page 1
Forum section: electronics / general

author: hsynylcn
author_rank: Contributor
timestamp: June 21, 2025, 09:10:39 pm
content: I built the circuit from the datasheet for the ADS1262, set the START pin HIGH and CS pin LOW. If the ADS is working, I should see a square wave from the DRDY pin. If I don't see it, does this indicate that the ADS might be faulty?

author: Simon
author_rank: Unknown
timestamp: June 22, 2025, 08:28:31 am
content: https://www.eevblog.com/forum/projects/ads1262-test-464375/msg5955129/#msg5955129
Is this a fake BF199  ?? - Page 1
Forum section: electronics / general

author: jdev99
author_rank: Regular Contributor
timestamp: June 24, 2025, 05:14:15 pm
content: I bought some BF199 NPN transistors on eBay (big mistake), advertised as "original from Fairchild or Phillips", but seems to have received something different.I tested it on 2 transistor testers and both showed an internal diode between emitter and collector.Have you seen this before, what type of transistor is this then?Datasheet of real BF199:https://www.mouser.com/datasheet/2/302/nxp_bf199-1188768.pdf

author: tom66
author_rank: Super Contributor
timestamp: June 24, 2025, 09:17:52 pm
content: The diode is weird, something like an IGBT perhaps, but I don't think I've ever seen one that tests like that (with a base instead of a gate?) Potentially a leaky device or the tester is faulty/analysing the device wrong.

author: jdev99
author_rank: Regular Contributor
timestamp: June 25, 2025, 06:07:32 pm
content: I also tested it with a DMM set to "diode" and then still measure a diode.I tried it in my project and it works as expected, maybe some leakage as you said, anyway.

author: wraper
author_rank: Unknown
timestamp: June 25, 2025, 06:22:53 pm
content: I've seen some parts like that in the past. It does not necessarily will be mentioned in the datasheet. Unless you measure a known genuine part, it's hard to tell if it should be like that. Also unless you can measure B-E in both directions, it's not simple leakage.

author: jonatanz
author_rank: Newbie
timestamp: June 26, 2025, 04:10:57 am
content: Hello!I have some old BF199s which I believe are original Philips, and they also show this diode when I put them in the transistor tester. So I would say that it is probably a characteristic of this model.

author: Swainster
author_rank: Frequent Contributor
timestamp: June 26, 2025, 06:46:56 am
content: I've also noticed that RF transistors often give anomalous results in those little component testers. Unfortunately I haven't (yet) got around to investigating why this happens.

author: jdev99
author_rank: Regular Contributor
timestamp: June 26, 2025, 02:27:09 pm
content: I now tested it on a 3rd Transistor tester (one of these TC1 models with updated custom fw: v1.51) and it does not show the diode.So 1 way of looking at it, just use a different meter until you get the result that makes you happy.

author: iMo
author_rank: Super Contributor
timestamp: June 26, 2025, 03:17:48 pm
content: It could be caused by a fact the BF199 is RF low capacitance transistor, and there could be a special way how they achieved that - like special collector - substrate doping or a similar voodoo (experts may explain) creating a parasitic diode there upon some Ibe/Ice settings.What I know from very past the BF199s were somehow special with their characteristics.
Adding ground to a charger without one - Page 1
Forum section: electronics / general

author: DavidArthur
author_rank: Newbie
timestamp: June 21, 2025, 12:35:21 am
content: Hi,I'm new to the forum and have a question related to chargers for Lipo battery modules. I recently built an EV that has a total of 6x67v battery modules, each with its own 120/240v charger onboard.I have wired up a J1772 socket and charge from my 240 outlet in my house. This has worked great. The chargers are all in plastic housings so don't have a ground, therefore I only have two of the contacts wired up on the socket for the 240. I am guessing that EV charging stations search for a ground when plugging in and if there isn't one, nothing happens (tried it and this is what happened). Is it possible to add a ground to my configuration for this use? Would I wire a ground to the chassis? Hopefully this isn't a dumb question :0 Thanks for any help or suggestions on this.

author: thm_w
author_rank: Super Contributor
timestamp: June 25, 2025, 08:54:40 pm
content: Answered in other locations already:https://forum.allaboutcircuits.com/threads/adding-ground-to-a-charger.207145/https://electronics.stackexchange.com/questions/750387/adding-a-ground-to-battery-charger-without-one

author: tom66
author_rank: Super Contributor
timestamp: June 25, 2025, 09:35:15 pm
content: EV chargers require the CP/PP signal to be referenced to ground/protective earth, so it's impossible to charge an EV without one. If you want to be a bit hacky, you need to build or buy a box that emulates this signal - merely connecting to live and neutral won't be enough (since the EVSE doesn't supply power until the car requests it properly.)Normally the chassis is grounded to protective earth as well as 12V battery negative, this is part of the electrical safety of the vehicle. I have an EV, and this is how it is configured. I am not certain if it is required, and wonder how EVs with non-conductive bodies like BMW i3 do it...
Was reading datasheet of XL-5050RGBC-WS2812B (addressable RGB LED) when suddenly - Page 1
Forum section: electronics / general

author: dusan
author_rank: Regular Contributor
timestamp: June 20, 2025, 03:44:52 pm
content: I was reading datasheet of XL-5050RGBC-WS2812B (addressable RGB LED) when suddenly this gem popped out:Datasheet is here:https://lcsc.com/datasheet/lcsc_datasheet_2506031657_XINGLIGHT-XL-5050RGBC-WS2812B_C2843785.pdf

author: tom66
author_rank: Super Contributor
timestamp: June 20, 2025, 05:13:26 pm
content: I would have thought an RGB LED is the most prideful form of LED.How else can you implement a rainbow in one chip?More seriously, I suspect they meant "homogeneous" (using one LED for all pixel colours, perhaps?) rather than "heterosexual".

author: bte
author_rank: Regular Contributor
timestamp: June 20, 2025, 06:02:12 pm
content: Google translates this as "opposite-sex screen"https://translate.google.com/?sl=auto&tl=en&text=%E5%BC%82%E6%80%A7%E5%B1%8F&op=translateBut it also asks whether I meanthttps://translate.google.com/?sl=auto&tl=en&text=%E5%BC%82%E5%BD%A2%E5%B1%8F&op=translatewhich it translates as "Special-shaped screen"

author: floobydust
author_rank: Super Contributor
timestamp: June 20, 2025, 07:54:50 pm
content: It's trying to get the birth rate up. On screen lol.This part is older, the WS2812 has known big issues generating EMI, in the VHF band. Some are revised with slew-rate limited output I think it's the "C" version, not sure.
Establishing PC Communication, Keysight E36731A Battery Emulator MATLAB/Python - Page 1
Forum section: electronics / general

author: Abdul.m
author_rank: Newbie
timestamp: June 16, 2025, 02:21:55 pm
content: Dear Expert Community Members,I am currently working on a project where I need to establish Remote communication between a PC and the Keysight E36731A Battery Emulator, using either MATLAB or Python. Being a Mechanical Engineer and having limited background in coding , I’m reaching out to see if anyone in the community has worked on a similar project or has resources that could help speed up the process.If anyone has already developed the full code to communicate remotely with the emulator or can point me to helpful documentation or resources, I would greatly appreciate your support!Thank you in advance for your time and assistance.RegardsAbdul
DHL Express Suspends All Services In Canada - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 17, 2025, 05:13:11 am
content: This impacts my store and Canadian customers.Quote

author: AVGresponding
author_rank: Super Contributor
timestamp: June 17, 2025, 05:28:37 am
content: IOW the Canadian government is removing some of their ability to do an end run around the union negotiations, and therefore they are cutting off their nose to spite their face

author: brucehoult
author_rank: Super Contributor
timestamp: June 17, 2025, 05:58:02 am
content: Quote from: AVGresponding on June 17, 2025, 05:28:37 amAwful.In the 1970s and early 1980s unions here in New Zealand had far too much power. The boilermakers union and storemen and packers were constantly on strike. At school holidays and Christmas you could just about guarantee that the Cook Strait ferries would be on strike, and often Air NZ too.The 1984-1990 Labour government fixed a lot of things that needed fixing, burning vast amounts of legislation, and the 1990-1993 National government finished the job in some areas that Labour felt they couldn't touch including , well, labour.For the last few decades:- everyone is free to negotiate their employment conditions individually or collectively, as they choose.- an employer can't punish you for being a member of a union- a union can't force you to join, or prohibit the employment of non-union (or a different union) people

author: thm_w
author_rank: Super Contributor
timestamp: June 17, 2025, 11:37:53 pm
content: Ah this explains why we had no DHL pickups for multiple days last week, and why they were sending out random dudes in their personal vehicles to pick up packages. Luckily we don't ship DHL within Canada so no effect there.Lets try to avoid politics, but if you want to read the reasoning you can see here:https://nbmediacoop.org/2020/02/17/where-there-are-scabs-there-is-violence-why-quebec-and-bc-banned-strikebreakers/If you want to understand why union membership has value:https://jacobin.com/2021/09/labor-day-chart-union-membership-share-top-10-percent-income-inequalityUPS is unionized in Canada, and Fedex is currently in progress.
2024 Chinese New Year Trip, Taipei City Mall (Train Station) Electronics Store - Page 1
Forum section: electronics / general

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 12:22:54 pm
content: Cleaning up hard drive, realized I forgot to post this a year and half ago.My wife and I had a layover in Taipei while traveling to mainland for New Years family activities. We exploring the city's public transit when we discovered a mall attached to Taipei Main Station. Here are the links for the location.http://www.taipeimall.com.tw/en/home/141/shop_show(HTTP only, no HTTPS) try,https://www.travel.taipei/en/attraction/details/2145https://web.metro.taipei/pages/en/station/051In the mall was an awesome little electronics store - bought a 555... The pictures follow.

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 12:36:05 pm
content: Resistor wall

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 12:36:58 pm
content: Wire shelf

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 12:38:10 pm
content: (mechanical) Belt wall

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 12:39:21 pm
content: Connectors

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 12:40:27 pm
content: Capacitors

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 12:43:30 pm
content: Diodes

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 12:44:44 pm
content: Heatsinks

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 12:50:03 pm
content: more diodes

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 01:10:10 pm
content: Kits and relay boards

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 01:11:09 pm
content: Behind the counter ICs. I bought a 555 before leaving.

author: jpyeron
author_rank: Regular Contributor
timestamp: June 15, 2025, 01:12:17 pm
content: Crazy large 7 segment LED

author: Njk
author_rank: Frequent Contributor
timestamp: June 15, 2025, 05:40:11 pm
content: Don't forget about the wonderful things to see there (the nature parks in the vicinity)
[Physics question] What is the proper edge condition to simulate open space? - Page 1
Forum section: electronics / general

author: Ben321
author_rank: Frequent Contributor
timestamp: June 12, 2025, 09:56:05 am
content: Since a simulation doesn't have infinite space for wave propagation, the edge of the simulation area needs to set an edge condition. If the edge condition is that the cells at the edge of the simulation space are infinitely immovable, then the wave reaching edge of the simulation area have a negative reflection (it will bounce back with the opposite polarity as the original incoming wave). If I have an edge condition where the the edge cells are completely movable, then the wave reaching the edge of the simulation space will reflect with a positive reflection (it will bounce back with the same polarity as the original incoming wave). What should I do for the cells at the edge of the simulation area, to make the wave pass through them as if they were passing through open space, thereby triggering no reflection (having the edge of the simulation space instead completely absorb the wave)?

author: RoGeorge
author_rank: Super Contributor
timestamp: June 12, 2025, 10:44:17 am
content: You have tomatchthe impedance, that would be the equivalent of "no edge", or else said zero reflections.If you terminate the transmission line (your cells) with thecomplex conjugateof the transmission line impedance, then all the energy will be absorbed by the lineterminator.

author: cbutlera
author_rank: Regular Contributor
timestamp: June 13, 2025, 09:08:43 pm
content: https://en.wikipedia.org/wiki/Perfectly_matched_layerI found this paper very useful when playing about with FDTD stuff for fun, about 12 years ago.https://cecas.clemson.edu/cvel/pdf/TR94-6-017.pdf
Find the ISP IC provider - Page 1
Forum section: electronics / general

author: hungnvk54
author_rank: Newbie
timestamp: June 11, 2025, 12:11:24 pm
content: My camera sensor in my robot is broken. I want to self repair it, but i can't find the ic datasheet and provider. Do you know about this IC?

author: thm_w
author_rank: Super Contributor
timestamp: June 11, 2025, 09:30:49 pm
content: Why do you think that IC is at fault?This should be in the repair section, but, chance of repair seems low. Unless its something like a loose connection and heating up the board or pressing on the board made the camera work again.https://electronics.stackexchange.com/questions/749764/find-the-ic-provider
Multimeter protection aspects for Ohm, diode mode - Page 1
Forum section: electronics / general

author: ahagele
author_rank: Newbie
timestamp: June 11, 2025, 06:37:06 am
content: Hi forum,I like to understand how the input protection works on multimeters for signal bearing modes like resistance, capacitance and diode tests.These modes require voltage or currents to be injected at the meter terminals. I'm aware of the general protection methods against overvoltage and spikes, I've watched the eevblog #373 and #1655 on this.The questions remaining are,- How are the meter injected voltage and current protected from accidental external power?- How to measure resistance, capacitance and diode voltages when there is are substantial series resistances to the DUT in the shape of PTCs, suppressors and other Rs?CheersAndreas

author: Kleinstein
author_rank: Super Contributor
timestamp: June 11, 2025, 08:58:00 am
content: The test current for the Ohms and diode mode is usually flowing through some PTC (mainly lower grade merters) or some diode and high voltage transistors (meters with a higher test current). The read back of the voltage has a separate path and protection (e.g. series resistor). So the resistance of the protection and ideally much of the range switching is not included in the measurement. That part is handled like 4 wire ohms with separate force and sense paths.
What happened to Digikey?  (My  uCurrent adventure) - Page 1
Forum section: electronics / general

author: watchmaker
author_rank: Unknown
timestamp: June 09, 2025, 06:49:36 pm
content: I just tried to order parts for Dave's uCuurent (Rev 5) from Digikey. Too many things not available. Mouser had it all.Now for the adventure. I decided to test the US Tarrif on something small; ordered 5 uCurrent boards from JCB. Yep, 100% tariff. $28 including shipping,$80$60 w/ tariff and "fees".$60 total for 5 boards. (I was on a phone call when I originally posted and I know I cannot multitask!)Had to sub for LVM321, will see how the newer packages work; I believe the main change is package height.I just put together a BOM and it is another $50 for the parts. I mean $65 for this is not bad, and it certainly makes Dave's original price and the various other options justified.I have always used Digikey, but it looks like Mouser now. Oh, BTW, thanks for LCSC link. It WORKS! Got an assortment of 1206 Tants for not much money. And no tariff!

author: kripton2035
author_rank: Super Contributor
timestamp: June 09, 2025, 06:56:03 pm
content: the american people will not be able to buy stuff anymore with such heavy prices ...hard times for the american economy...and the rest of the world will try to follow...

author: bdunham7
author_rank: Super Contributor
timestamp: June 09, 2025, 07:07:54 pm
content: Quote from: watchmaker on June 09, 2025, 06:49:36 pmDid you price out OSH Park for the boards?

author: watchmaker
author_rank: Unknown
timestamp: June 09, 2025, 11:59:51 pm
content: Of course not.I just looked them up and set up an account. THANKS!
MV1404 hyper abrupt varicaps - Page 1
Forum section: electronics / general

author: paul cotter
author_rank: Regular Contributor
timestamp: June 06, 2025, 08:22:03 am
content: These diodes were ubiquitous in broadcast technology ~40years ago(could still be, I don't know) for wideband fm generation. Yet the specs indicate they are for am tuning purposes. Also they were quite expensive and I could imagine the cost of one of these being the principle component cost in a cheap am receiver. I have used dirt cheap varicaps in home-made fm exciters and the audio quality seemed excellent to me(very subjective, I realise). Confused, any ideas?

author: kensmith
author_rank: Newbie
timestamp: June 06, 2025, 09:31:41 am
content: Yeah, I’ve noticed that too and had the same question a while back. Even though some of those varicap diodes were labeled for AM tuning, they were definitely used in FM circuits, especially in older broadcast gear. I think it came down to their stability and good linear response, which made them reliable for wideband FM.In DIY builds, cheap varicaps usually work fine — I’ve used them too and thought the audio was pretty decent. But in pro gear, I guess they needed better specs for long-term stability and cleaner modulation.So yeah, nothing strange really — just different expectations and use cases.

author: BrianHG
author_rank: Super Contributor
timestamp: June 06, 2025, 09:34:01 pm
content: The hyper abrupt varicaps went from ridiculously high to reasonably low capacitance with a small voltage change.I used to use Zener diodes as tuning diodes.A 75v 125mw one could go from 30pf to 2pf, 0v to 25v.A 25v one may go as high as 100pf at 0v, down to 15pf at 12v.Note that going slightly into the negative voltage (forward bias) allowed that 25v one go to ~200pf, or 60pf for the 75v one.
ALIEXPRESS global promo codes - Page 1
Forum section: electronics / general

author: u666sa
author_rank: Frequent Contributor
timestamp: June 05, 2025, 07:57:49 pm
content: I'm starting this thread for ALIEXPRESS promo codes. If you have promo codes you want to share, feal free to share. No thanks or otherwise trash talk, please. Pure and simple "CONTRIBUTE" mode. Just up-to-date codes that work.Let me startYou can search for all items that qualify for particular promo codes by using the search code for the supported items.

author: bte
author_rank: Regular Contributor
timestamp: June 05, 2025, 09:45:35 pm
content: Check this video for some "influencer" coupons:
Micro-Cap - what do you think?  - Page 1
Forum section: electronics / general

author: SteveThackery
author_rank: Super Contributor
timestamp: June 05, 2025, 02:24:36 pm
content: Colleagues!Chet's ramblings have put me onto the circuit simulator Micro-Cap. At first glance it looks amazing: a great deal of functionality available through a graphical UI. A second look suggests it has a steep learning curve, though. I've scanned the User Guide, and it seems to suggest that it uses SPICE under the hood.Despite my concern about the learning curve, it looks like it could be a very useful and powerful tool. Which prompts me to ask:1/ Is it respected and considered appropriate for a professional environment?2/ Is it SPICE-based? Or SPICE plus something more?3/ It seems as if it might emulate microcontrollers running real software - is that right?4/ Is it hard to learn, or merely intimidating at first glance?5/ Would you recommend it for a 50-year novice like me?6/ What are it's strengths and weaknesses?What other comments, observations, warnings, recommendations or thoughts do you have?Thanks in advance for your thoughts. 😄

author: nctnico
author_rank: Super Contributor
timestamp: June 05, 2025, 02:46:33 pm
content: I have been using Micro-cap to simulate some circuits. It works pretty well although the user interface takes some getting used to. I don't think Microcap runs out of steam quickly.

author: tggzzz
author_rank: Super Contributor
timestamp: June 05, 2025, 05:04:59 pm
content: One interesting capability is that it can import IBIS package specification files.

author: thm_w
author_rank: Super Contributor
timestamp: June 05, 2025, 08:46:52 pm
content: Its good, prefer it over ltspice.https://www.eevblog.com/forum/projects/microcap-12-is-free-(as-in-beer)-now/Microcap I don't think supports microcontrollers, there are few simulators that do. Emulating microcontrollers running code in simulator almost never makes sense to do IMO (unless for some reason you have no access to a mcu).All simulators are difficult to learn unless you are talking about something like Falstad:https://www.falstad.com/circuit/circuitjs.htmlYou can always start there first and move to microcap once you run out of features.
DP832A Monitor feature - Page 1
Forum section: electronics / general

author: cyberwasp
author_rank: Contributor
timestamp: June 04, 2025, 06:29:33 pm
content: Could someone go over the DP832a Monitor feature. If I'm understanding the manual, it can be programmed to turn off the output, or beep when the desired condition is met. Example,: testing a project and the current output drops to .015mah the device will disable the output?On page 2-36 this is outlined. however, Step 6 eludes me as I don't see a switch as a button or in the display.6. SwitchPress Switch to turn on or off the monitor function.TIA

author: RoGeorge
author_rank: Super Contributor
timestamp: June 04, 2025, 07:55:37 pm
content: Yes, DP832A (or DP832 upgraded to DP832A - a software upgrade, DP832 and DP832A have the same hardware) can do that.The "Switch" at point 6. in the manual is the second button on the lower bar (see the attached DP832 screenshot). "Switch" can be set to either "On" or "Off" by pressing the second grey button on the row of 5 (physical) grey buttons under the LCD screen.

author: cyberwasp
author_rank: Contributor
timestamp: June 05, 2025, 01:32:11 pm
content: Thank you RoGeorge. Do me a favor and don't get old or stuff like this happens!! my brain just skipped over it.

author: kensmith
author_rank: Newbie
timestamp: June 06, 2025, 09:41:17 am
content: Yeah, you're understanding it pretty well. The Monitor feature on the DP832A lets you keep an eye on the voltage or current of a channel, and when it hits a set condition (like going below a certain current), it can automatically take an action — like turning off the output or giving you a beep.So in your example, yeah — if you set it to monitor current and it drops below 0.015 mA, the power supply can be set to shut off the output. Super useful for testing low-power cutoffs or catching unexpected drops.
retrobrewcomputers, how to register? - Page 1
Forum section: electronics / general

author: DiTBho
author_rank: Super Contributor
timestamp: June 02, 2025, 08:56:46 pm
content: I don't know if this is the right section for this question, does anyone know how to register on theretrobrewcomputersforum?(I need 68k help, and I need to discuss specific 68k-stuff)The instructions say to register on the wiki and then send an email to the admin (admin at retrobrewcomputers dot org).But I sent 5, 1 a week one from the other, and after ~1 month, about from the first email sent, I still haven't gotten a response.Dunno

author: Benta
author_rank: Super Contributor
timestamp: June 02, 2025, 09:20:06 pm
content: I just registered. No problem.But that forum is dead as a dodo, dunno why you'd look for 68k help there.

author: woofy
author_rank: Frequent Contributor
timestamp: June 03, 2025, 07:01:26 am
content: There ishttps://retrocomputingforum.com/Also, I wouldn't discount our own vintage section either. A lot of folks will have historic 68k experience.

author: DiTBho
author_rank: Super Contributor
timestamp: June 03, 2025, 11:34:28 am
content: Quote from: Benta on June 02, 2025, 09:20:06 pmBecause I saw a topic about exactly the same 68k sbc I am working on. Never found anyone on that elsewhere.

author: Benta
author_rank: Super Contributor
timestamp: June 03, 2025, 10:16:45 pm
content: Well, if you keep the identity of your 68k SBC a secret, you won't get any help at all.Why not try here?
Looking for small BT Audio receiver without voice prompts for connected/lowbatt. - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: June 02, 2025, 11:12:13 pm
content: I'm looking for small battery powered BT audio receiver that doesn't have any voice prompts for connected/low batt. etc.. All the ones I'm finding have that.It needs to be small enough to fit inside another product. So like a 4x4cm PCB or smaller.Has anyone come across any on Aliexpress or wherever?I can buy one with audio prompts and hack its ext flash chip to set all the audio file lengths to 0, I did that once before, but it would be nicer to just buy one ready to go.
Google Veo3 videos for electronics - Page 1
Forum section: electronics / general

author: Schottky
author_rank: Regular Contributor
timestamp: June 08, 2025, 07:18:28 pm
content: I've been experimenting with Google Veo 3 for electronics, here are some fun videos it created, popping electrolytic capacitors and answering questions about GaN and SiC transistors! very impressive and fun!

author: tom66
author_rank: Super Contributor
timestamp: June 08, 2025, 08:33:57 pm
content: The weird text and odd hallucinated objects is a bit like that dream most people have where they have some brilliant invention but they just can't quite picture it...Still, with a few more iterations, I could see this replacing video editing for many low to mid-end tasks, like producing training videos or making marketing / sales copy.

author: Analog Kid
author_rank: Super Contributor
timestamp: June 08, 2025, 08:57:41 pm
content: I'd like to see the occasional penis put in there somewhere discreetly, see if people are paying attnetion.