hybridfree/eevblog-posts huggingface dataset:
OT B-29 "Doc" Cockpit View Full Flight - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 21, 2025, 02:04:02 am
content: Pretty cool if you are into aviation.

author: Analog Kid
author_rank: Super Contributor
timestamp: January 21, 2025, 03:08:00 am
content: So who makes the turns on the ground, like out from and onto the taxiways? Couldn't see any movement among any of the 3 that would indicate this. (I thought it was the guy in front at first.)

author: Oilngas
author_rank: Contributor
timestamp: January 21, 2025, 03:31:31 am
content: The guy in the left seat appears to be using differential braking. Watch his feet as he depresses the top of the rudder pedals.

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: January 21, 2025, 11:31:59 pm
content: Guy in front is Bombardier, my father's position in a 29.

author: Benta
author_rank: Super Contributor
timestamp: January 22, 2025, 12:00:25 am
content: Why post clips from games?Somewhat adolescent, no?

author: Analog Kid
author_rank: Super Contributor
timestamp: January 22, 2025, 12:05:29 am
content: Looks real to me.

author: SiliconWizard
author_rank: Super Contributor
timestamp: January 22, 2025, 12:34:56 am
content: Yeah, they are apparently advertising for this:https://www.b29doc.com/events/
Youtube Live Stream Watchtime How Does It Work? - Page 1
Forum section: electronics / general

author: nvidia
author_rank: Regular Contributor
timestamp: January 20, 2025, 10:25:25 pm
content: so guys i did a live stream on my phone yesterday for like 5hrsafter stream was over my analytics said in traffic sources 77% of views where from shorts feedand i had 66 views and 6.3hrs watch time i checked my analytics like 6hrs latter and it said the same thingwhen i got up today to check my analytics it says15 views and 0.3hrs watch timeand under traffic sources it only shows Browse featuresbut if i go to watch my live stream the view show 70also i checked another stream i did 5 days ago and the analytics saysviews 1 and watchtime is 3.2hrs but going to watch the video the views are 41so what is going on?
More US semiconductor bans - Page 1
Forum section: electronics / general

author: SiliconWizard
author_rank: Super Contributor
timestamp: January 19, 2025, 11:29:29 pm
content: https://www.reuters.com/world/us/us-adds-16-entities-its-trade-blacklist-14-china-2025-01-15/Sophgo is listed, which is the company, among other things, that makes the RISC-V SoCs on the milkV duo boards (CV1800B/SG2002/SG2002) and there are more powerful CPUs as well, such as the SG2380.I guess that means that anyone in the US can say goodbye to those chips and boards, and possibly other countries who'll follow the US bans.What do you think?

author: amyk
author_rank: Super Contributor
timestamp: January 20, 2025, 02:02:25 am
content: Quote from: SiliconWizard on January 19, 2025, 11:29:29 pmIt sounds like these areexportrestrictions, stopping export from the US to China. Importing stuff from China (especially in small quantities) doesn't seem to be a target of this.

author: Analog Kid
author_rank: Super Contributor
timestamp: January 20, 2025, 03:15:20 am
content: Yes, the idea is to stop Our Latest Enemy from getting all this good stuff.And of course the ban makes perfect sense since we have always been at war with Eastasia ...
Starship on 7th test flight, tries to catch returning booster - Page 1
Forum section: electronics / general

author: iMo
author_rank: Super Contributor
timestamp: January 16, 2025, 09:27:48 pm
content: ..in 70 minutes from now..

author: brucehoult
author_rank: Super Contributor
timestamp: January 16, 2025, 10:04:12 pm
content: “What man has done, man can aspire to do.” — Jerry Pournelle

author: tom66
author_rank: Super Contributor
timestamp: January 16, 2025, 10:45:50 pm
content: Nice catch. Good job, SpaceX engineers.

author: brucehoult
author_rank: Super Contributor
timestamp: January 16, 2025, 11:28:45 pm
content: :-(https://x.com/FlyerXT/status/1880027458642350095

author: tom66
author_rank: Super Contributor
timestamp: January 17, 2025, 12:08:21 am
content: Oh dear, looks like a progressive failure going by the telemetry, losing engines one by one then all telemetry gone, guess that was the moment of RUD. Doesn't really look like an FTS to me, too uneven and too late. Will definitely be an FAA investigation as it RUD over a populated area.

author: coppice
author_rank: Super Contributor
timestamp: January 17, 2025, 12:17:56 am
content: Interesting that one booster engine failed to start on the second burn, but ran OK on the third burn. The catch was nice and clean this time. No bits falling off, and flames around the side. Shame about the starship, but it sounds like they have made a lot of changes to its design since the last flight. So, there was plenty of opportunity for something new to go wrong.

author: Psi
author_rank: Super Contributor
timestamp: January 17, 2025, 12:29:40 am
content: This was the first V2 ship to fly.So not all that surprising they have some new issue to sort out.Lots of changes on V2, it's longer, and the engine plumbing has been redone.There's also a video showing a side panel that looked to be pealing off. So could have been that too.

author: MT
author_rank: Super Contributor
timestamp: January 17, 2025, 02:15:49 am
content: Batty: I've seen things you people wouldn't believe. Attack ships on fire off the shoulder of Orion. I watchedStarShipsglitter in the dark near the Tannhauser gate. All those moments will be lost in time... like tears in rain... Time to die

author: iMo
author_rank: Super Contributor
timestamp: January 17, 2025, 11:15:39 am
content: Elon wants the next flight within February, afaik, so let us wait what the FAA thinks about..

author: tom66
author_rank: Super Contributor
timestamp: January 17, 2025, 11:20:17 am
content: I suspect forsome reasonthe FAA may besuddenly much more willingto enable Elon's flights. Sometime after the 20th January, for some odd reason.

author: brucehoult
author_rank: Super Contributor
timestamp: January 17, 2025, 12:13:30 pm
content: Quote from: tom66 on January 17, 2025, 11:20:17 amThey've already in the past indicated that failures at a speed and altitude where the bits will burn up without putting anyone at risk (or anyway very very low probability) are not their concern.Blowing up before staging, or coming in to land, yes that would be a problem.
Measuring/reverse engineering a connector housing? - Page 1
Forum section: electronics / general

author: incf
author_rank: Frequent Contributor
timestamp: January 29, 2025, 05:28:11 pm
content: Commercially, I have encountered a situation where I'd like to duplicate and modify a connector housing that is produced overseas by an unknown manufacturer.I was wondering if anyone here has any experience with this? (I don't really know what board this would fall under)I think what I'd need to do is approach a connector manufacturer and ask them to carry out all of that work. However, I'm open to other paths. I wonder if maybe a measurement/machine shop might be a suitable avenue to produce an accurate 3D model of the original connector housing?Connectors housings are tiny, and have internal features that can be difficult to measure by hand.Edit: we are not concerned with the crimp, only the plastic housing

author: thm_w
author_rank: Super Contributor
timestamp: January 29, 2025, 10:11:27 pm
content: There is no chance you can afford the cost of a connector manufacturer making a new connector assembly line.But if you did, you'd send off some samples to the connector company, and they would be able to reverse engineer it.Did you look around on alibaba and ask some vendors yet?Isn't this just a crimped RGB strip light connector?https://www.alibaba.com/product-detail/Black-White-4Pin-10mm-RGB-L_1600449091765.htmlhttps://www.aliexpress.com/item/1005006976695436.html

author: incf
author_rank: Frequent Contributor
timestamp: January 29, 2025, 10:26:43 pm
content: Quote from: thm_w on January 29, 2025, 10:11:27 pmGood eye, you are correct.Tiny ABS/etc. molds really aren't expensive. But modeling them certainly is. (We only care to significantly modify the plastic housing)Tying to figure out an independent path. There are upsides and downsides to trying to carry out customization/engineering with "whoever sold you the connectors in the first place."

author: thm_w
author_rank: Super Contributor
timestamp: January 29, 2025, 11:17:50 pm
content: So why not say that from the start.Message a bunch of the alibaba manufacturers of these connectors and ask if they are able to do a customization, give them a sketch so they understand. I'm sure there are at least 5+ manufacturers of these.https://www.alibaba.com/product-detail/15cm-length-4pin-led-light-RGB_1600545492444.html
Homebrew Trail Camera Power - Page 1
Forum section: electronics / general

author: ko4nrbs
author_rank: Regular Contributor
timestamp: January 16, 2025, 09:31:01 pm
content: I use older digital cameras configured and modified as trail cameras in remote forest locations.In the past I have used external NiMh batteries in parallel with the camera’s internal battery as supplemental power. This has worked well for several years. The price of batteries and having to visit the camera often has had me visit Solar charging. NiMh don’t lead themselves to solar charge very well so was wondering if this module would be the answer.https://www.waveshare.com/solar-power-manager.htmThe onboard battery would be solar charged and its 3.3 volt output would provide the camera’s supplemental external power.Sound feasible?Bill

author: thm_w
author_rank: Super Contributor
timestamp: January 16, 2025, 11:16:08 pm
content: Sounds OK. I assume its using 2 series nimh? You can likely just remove those and power the camera with this device.If it has a flash or other high power requirement it may overload the 1A output.Spec: "Quiescent current (Max) <2mA". Should consider if that is reasonable or if you need lower. Or compensate with a larger lithium cell.nimh are used all the time in cheap garden lights with solar panels btw.

author: ko4nrbs
author_rank: Regular Contributor
timestamp: January 16, 2025, 11:53:50 pm
content: Thank you!!Yes the camera has two NiMh in series. The camera’s flash capacitor was replaced with one with just enough power to activate the external slave flash. It is powered by four NiMh C cells. The module’s 5 volt output could be used to maintain those batteries.The camera is only actuated when triggered by an approaching animal. Sleeps until then.Bill

author: ko4nrbs
author_rank: Regular Contributor
timestamp: January 17, 2025, 04:11:12 pm
content: I decided to use a solar panel with an onboard battery that it charges. Can then use a DC-DC Buck Converter to adjust the voltage down for the camera and slave flash. Lots simpler!!Bill
Sperry 311 / Honeywell vg-311 gyro - Page 1
Forum section: electronics / general

author: wje
author_rank: Contributor
timestamp: December 02, 2022, 12:28:46 pm
content: I'm desperately looking for at least connector pinouts for this critter. I'm really into mechanical gyros, got one of these, want to get it running. It was very popular in commercial aircraft in the late 60s and into the 70s, including the 747. One would think the info would be around, but I sure can't find any. I'm hoping to avoid hours of tracing and deciphering the electronics, such as they are (all discrete point-to-point on standoffs, all transistors, no ICs at all). One thing I know so far, takes 115v 400Hz.Thanks, Bill

author: wje
author_rank: Contributor
timestamp: February 18, 2023, 01:29:53 am
content: Followup, found an aircraft svc company that was gracious enough to send me the complete service manual. I have it working, such a nice critter. The pitch/roll outputs are synchros. And yes 115V 400Hz, which is a bit of a pain to provide. Takes a bit over a minute to spin up (to 11K rpm) and stabilize. Has some really strange feedback sensors to correct for drift, liquid filled levels. Leads on both ends and in the middle. Each outer lead goes to a torque motor winding, counter-wound for each end. The variable resistance vs angle determines the current to the torque motor windings. No damping electronics. Not really any electronics at all. The electronics only do fault monitoring and some simple 'fast startup' control provided by inductors with shunting SCRs. On start, SCRs short the inductors to provide more voltage to the spin motor and the torque motors. Once up to speed, inductors switched in to drop the voltage. Really pretty interesting. Well, IMHO. Oh, and mechanically, cut the power takes 20 minutes or more for the rotor to fully spin down. The bearings must be amazing. We have really forgotten how advanced magnetic control stuff was back in the day.

author: MK14
author_rank: Super Contributor
timestamp: February 18, 2023, 05:33:00 am
content: Quote from: wje on February 18, 2023, 01:29:53 amThat is amazing!Presumably, too much friction/drag, may affect its reading accuracy, by causing drift and other errors in the readings, as time goes on.

author: Amateurtelecom
author_rank: Newbie
timestamp: June 04, 2023, 02:46:53 pm
content: Would you be kind enough to contact me? I bougt a Sperry 311 gyro and I would luke to receive a copy of your service manual. Can you help me?Jacob from The Netherlands.Www.polytech.nu

author: Amateurtelecom
author_rank: Newbie
timestamp: June 04, 2023, 06:29:30 pm
content: By the way, this is what is looks like inside. A masterpiece of precision engineering.

author: the_fpga_stig
author_rank: Newbie
timestamp: January 14, 2025, 06:06:36 pm
content: Hey, I know this is an old thread, but I just bought the same unit out of eBay.Would it be possible to share the pin out of the connector?Thanks in advance
Project scope and deadline in hardware design engineering - Page 1
Forum section: electronics / general

author: electronx
author_rank: Regular Contributor
timestamp: January 14, 2025, 10:25:59 am
content: Yes, hardware design is a wide area.High speed carrier boardsSOM modulesAnalog designPower designand many more that I can't listHowever, I want you to evaluate it in general. For example, let's take Intel's carrier boards.What is your average deadline and what is the scope you need to do in the project? Library design, system design, schematic design, layout design. Electromagnetic simulations, customizations. including prototyping and final productDo you think 2 months of project time is enough for one engineer ?it would be great if you could give examples such as project , scope and deadline.
WTB: Large amount of solder wick - Page 1
Forum section: electronics / general

author: Shock
author_rank: Super Contributor
timestamp: January 13, 2025, 12:19:35 am
content: It's going to take a group effort.Edit:I saw this and couldn't resist.

author: Simmed
author_rank: Frequent Contributor
timestamp: January 13, 2025, 01:03:20 am
content: that requires a big soldering iron with a big tip*pppsssssssshhhhhhh*

author: GLouie
author_rank: Regular Contributor
timestamp: January 13, 2025, 05:27:38 pm
content: It's quite a famous sculpture in Chicago USA. Not A.I.
a new fan like thing, electrohydrodynamic fan - Page 1
Forum section: electronics / general

author: Simmed
author_rank: Frequent Contributor
timestamp: January 11, 2025, 11:43:59 pm
content: Quotehttps://www.researchgate.net/publication/370667897_Experimental_and_Analytical_Investigations_of_Wire-Partially_Insulated_Parallel_Plate_Electrode_Type_Electrohydrodynamic_Fanbased on the above paperi guess-timated the flow rate to be around 3cfmpossibly 4~5Pa = about 0.5mm H2Othe korean version research has a interesting picture showing a pulse drivehttps://www.researchgate.net/publication/322700648_The_creation_of_electric_wind_due_to_the_electrohydrodynamic_force
Transferring support between Xeltek programmers - Page 1
Forum section: electronics / general

author: Miti
author_rank: Super Contributor
timestamp: January 10, 2025, 06:52:22 pm
content: Does anyone know how to transfer support between Xeltek programmers? I’m talking about parts that have algorithms on both programmers, the one from which I want to transfer the support and on the one that I want to transfer it to, but does not have support for the package that I need.For example SP6100N has support for FM22L16 in DIL, TSSOP and BGA packages while SP5000 does not support DIL package. I soldered a chip on an adapter TSSOP to DIL and I want to test it on an SP5000 and it wouldn’t allow me, I need to buy an expensive socket. Is there a way to transfer some config file from SP6100 to SP5000 and add DIL support since it knows the part?Cheers,Miti
How do you get electronics news and stay informed about EE? - Page 1
Forum section: electronics / general

author: Zucca
author_rank: Unknown
timestamp: January 09, 2025, 04:57:47 pm
content: Long story short I am now trying to watch less EE youtube videos because I was wasting too much time.How do you keep up and what are the information channels you use to stay up to date?I realize it is a very generic question, but it could spark an interesting discussion.

author: Ice-Tea
author_rank: Super Contributor
timestamp: January 09, 2025, 05:12:37 pm
content: Mostly by looking for solutions to a problem. I start googling, end up on manufacturer websites who'll make sure you're aware they just invented this awesome new thing ;-)And reading datasheets. Lots and lots (and lots) of datasheets.

author: Siwastaja
author_rank: Super Contributor
timestamp: January 09, 2025, 06:09:12 pm
content: This forum.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: January 09, 2025, 07:01:11 pm
content: Trade journals.https://www.ept.ca/https://www.edn.com/https://dl.acm.org/journal/toshttps://www.azooptics.com/optics-journals.aspx?cat=3etcNow, EE is a vast domain that can cover analog, RF, opto, magnetics, physics, etcPick a specialty and google for journal.

author: tggzzz
author_rank: Super Contributor
timestamp: January 09, 2025, 08:30:03 pm
content: Quote from: Zucca on January 09, 2025, 04:57:47 pmGood decision; it happens with 99.9% of yootoob talking heads.Stick to a medium where you can quickly scan/speedread an article to see whether it is worth your time.Yoootoob is 60 words/minuteat best, frequently 5 useful words/minute. I can scan an article in 30s to see if it is worth reading.
SMD Ferrite Beads - How are they manufactured? - Page 1
Forum section: electronics / general

author: Bicurico
author_rank: Super Contributor
timestamp: January 08, 2025, 12:04:00 pm
content: Hello,I have come into contact with SMD Ferrite Beads.I understand they are a conductive coil embedded in ferrite layers.This site shows a nice picture on how they are manufactured in layers:https://article.murata.com/en-global/article/basics-of-noise-countermeasures-lesson-4I wonder how it is possible that you can buy them so cheap (less than 5 cents on quantities above 500 or even less for larger quantities).How are they manufactured? Tested? Packaged?How can they be so cheap?

author: arlo_g
author_rank: Contributor
timestamp: January 08, 2025, 01:16:16 pm
content: I am no expert, but have read a bit about LTCC devices, and believe that that's what these SMD ferrite beads are.I understand that the process for fabricating these beads entails building up panels of many beads by laminating layers of "green" ferrite ceramic tape. In the green state, the powder is bound together by something that gives the tape some flexibility. The conductive traces are printed on ferrite layers, and I think that they would only be printed on layers that are already placed. The completed stack is fired, sintering the green ferrite into its final state.The panel is almost certainly singulated after firing. I suspect that yield on the panel is high enough that testing would only be done on terminated singulated dice.

author: thm_w
author_rank: Super Contributor
timestamp: January 08, 2025, 10:08:30 pm
content: Looks like printed sheets as mentioned above.https://www.tdk.com/en/tech-mag/ferrite02/010You can ask the same as why SMD capacitors are so cheap. Production process is probably almost the same, other than the interlayer vias part. There are a few videos on smd capacitor production facilities, can't find anything for ferrite smd.
What to do with excess salvage? - Page 1
Forum section: electronics / general

author: CoffinDodger
author_rank: Regular Contributor
timestamp: January 06, 2025, 06:26:54 pm
content: I've had the privilege of living in a community of people who move often and a dumpster for a medical warehouse that serves a number of facilities going through renovations. I had to stop looking around because now I've accumulated quite a bit of things and I have yet to have the time to do anything with almost any of it. Just got caught up seeing cool ideas in things. Then getting less time to do anything about it and overwhelmed with high expectations. If I'm going to finally get anywhere I need to narrow my focus.I need to find out what to do with some of this. I've attached an image below in case anyone here is interested. And if anyone is interested I have more I can post later. Any inquiries for item descriptions can be done here. If anyone is interested in receiving any of the items send me a DM. The price will be shipping and shipping materials. I don't often ship random heavy things so if you have any advice for keeping it affordable please let me know.Admins, I wasn't quite sure where to put this post as it's just as much asking for advice as it is for looking for people interested. If it's a better fit elsewhere, let me know and I'll try to make it work.

author: tom66
author_rank: Super Contributor
timestamp: January 06, 2025, 06:29:38 pm
content: If nearby you could try a local hackerspace.Our one has a policy where you can leave small bits of "junk" on a table for two weeks with a date on it for people to have for free or a nominal donation - if it's not gone by then, then you either collect it or it is binned.

author: CoffinDodger
author_rank: Regular Contributor
timestamp: January 06, 2025, 07:08:41 pm
content: Thanks tom,Apparently there is some maker spaces in my area. Gonna reach out to them and see if they have anything for HW donations.

author: nctnico
author_rank: Super Contributor
timestamp: January 06, 2025, 09:53:05 pm
content: When I need to get rid of excess stuff, I post an advertisement on a local (area specific) website for small ads so people can come and pick it up. Typically I ask for a small fee because human brains stop working after detecting the word 'free' and then get dissapointed because they expected to pick up something differentWhatever doesn't sell, goes to the recycling station.

author: MathWizard
author_rank: Super Contributor
timestamp: January 08, 2025, 11:38:13 am
content: I'd like to join the Brotherhood of Steel, and go around saving electronics from the dump. At least these days where I live, most of it get collected, and send to scrappers, not just put in the landfill.But I wish all the hobbyists could get to pick it all apart before it gets scrapped.
Bing-Google fun - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: January 07, 2025, 02:45:09 pm
content: Go to bing.com and search for 'Google'.Works also for 'Yandex'.Source: Microsoft Bing shows misleading Google-like page for 'Google' searches (https://www.bleepingcomputer.com/news/microsoft/microsoft-bing-shows-misleading-google-like-page-for-google-searches/)

author: magic
author_rank: Super Contributor
timestamp: January 07, 2025, 06:06:51 pm
content: LOLDraw stupid doodles, win stupid prizes I would say. They imitated Goolag's style quite well without any trademark violation

author: eutectique
author_rank: Frequent Contributor
timestamp: January 07, 2025, 06:14:18 pm
content: Google it with Bing !
Captcha of the day - Page 1
Forum section: electronics / general

author: BreakingOhmsLaw
author_rank: Frequent Contributor
timestamp: January 03, 2025, 11:49:29 pm
content: My son was playing Roblox just now and called me over. This was the Captcha he has to solve:To answer the obvious question: No, the Captcha did not work correctly.

author: amyk
author_rank: Super Contributor
timestamp: January 04, 2025, 12:52:49 am
content: Trick question - the trimpots on the top middle have been set to 220.

author: PA0PBZ
author_rank: Super Contributor
timestamp: January 04, 2025, 01:15:04 pm
content: https://doom-captcha.vercel.app/

author: tom66
author_rank: Super Contributor
timestamp: January 04, 2025, 11:00:05 pm
content: Does... does it count?
Happy New Year  - Page 1
Forum section: electronics / general

author: Sorama
author_rank: Frequent Contributor
timestamp: December 31, 2024, 06:44:57 pm
content: Some of the folks here are already in 2025, others not.Let me wish all of you a happy new year, a good health (still the most important aspect) and really nice projects and test equipment.Santé!Sam

author: nctnico
author_rank: Super Contributor
timestamp: December 31, 2024, 07:22:15 pm
content: Happy 2025 to everyone!

author: Grandchuck
author_rank: Super Contributor
timestamp: December 31, 2024, 09:54:33 pm
content: If anything can go wrong with 2025 it will. That aside, Happy New Year to all.
RS-Pro IDM-8341 Benchtop multimeter excel addin - Page 1
Forum section: electronics / general

author: divy001
author_rank: Newbie
timestamp: December 30, 2024, 05:23:58 am
content: HiI was trying to use RS Pro IDM-8341 to log some information on an excel.And to do i found there is an add-on for excel and drivers that go with it but all i can online are for GDM-8341. I changed drivers to work for IDM but excel add-in is difficult to change.Just wondering do anyone has drivers for IDM-8341 and maybe excel Add-in. (I have emailed RSPRO and gwtech as well but haven't received an response in last couple of days)

author: Simon
author_rank: Unknown
timestamp: December 31, 2024, 10:04:10 am
content: Hello, welcome to the forum. Please don't double post. It just annoys people as they spend time replying only to find the other same thread where other people told you the same thing so they wasted their time, and all the others too will all feel this way not just one person who put one post.https://www.eevblog.com/forum/testgear/rs-pro-idm-8341-benchtop-multimeter-excel-addin-449041/msg5765747/#msg5765747
Invention of the day:  The ABC Holder - Page 1
Forum section: electronics / general

author: RoGeorge
author_rank: Super Contributor
timestamp: December 31, 2024, 02:39:14 pm
content: Tadaaam!!! Proudly presenting ...  ... The ABC (Any Button Cell) Holder!Proof that it can hold any button cell:Almost forgot about this one, was very useful while measuring the mAh left in various types of button cell batteries after a couple of years of shelf storage. (Or for trying out of curiosity to recharge them, and guess what, they didn't.)

author: edpalmer42
author_rank: Super Contributor
timestamp: December 31, 2024, 07:28:09 pm
content: I recently needed an ABC clip. Since I'm lazy, I didn't build anything, I just used a Kelvin clip.

author: RoGeorge
author_rank: Super Contributor
timestamp: January 01, 2025, 07:55:50 am
content: That's a nice hack.(I don't have any Kelvin capable instruments, so no Kelvin clips either)
FlashMyPico.com - a CI/CD system for the RP2350/RP2040 - Page 1
Forum section: electronics / general

author: flashmypico
author_rank: Newbie
timestamp: December 30, 2024, 04:54:34 pm
content: I've made a tool that could help you develop and distribute your RP2040/RP2350 firmware [1, 2, 3]. While programming these chips can be as simple as copying a file onto a removable drive, I believe this process can be further improved with on-line hosting, verification and versioning features, the ability to update firmware on the go with your smartphone, build system integration, and more.Please take a look:https://flashmypico.comYou can also use this tool to learn about electronics engineering topics by exploring existing firmware, eg:https://flashmypico.com/flash/flashmypico/pico2_blink_simpleI'll appreciate your feedback! This is a project I'm still working on, and I'd like it to become as useful as possible.https://www.raspberrypi.com/products/rp2040/https://www.raspberrypi.com/products/rp2350/https://www.raspberrypi.com/products/raspberry-pi-pico-2/

author: abeyer
author_rank: Frequent Contributor
timestamp: December 30, 2024, 07:46:51 pm
content: Since you specifically asked for feedback:QuoteThis seems to imply that you'reprovidingCI/CD... but that doesn't seem to be the case from what I see (unless I missed something) you just have an API that can support working with an external system. It might be good to clarify/reword that.QuoteOh, ok, so where's the source?Or, in a slightly less snarky tone: this seems like it might be a useful convenience, and I'd consider paying for the convenience of someone running a service for me if I wasn't locked into it and had the option to run it myself. I'm extremely unlikely, however, to subscribe to something that's a closed platform charging me for the ability to use hardware I already own. I'm far from a FOSS zealot and pay for plenty of software. However I consider dev tools in particular one of those places that I rarely compromise... either they need to be open source, or they need to provide some form of offline perpetual license that doesn't rely on the vendor, so that my process isn't similarly dependent.QuoteI find discord particularly non-conducive to actually building a useful community, and generally don't use it unless forced to. Chat can be a nice adjunct to some more persistent format, but is a rather poor primary format and isn't really necessary. And if you do offer chat, just please,anything butdiscord.Also, I find it hard to read the API docs with the body payloads only specified by-dparams to curl... better to have an explicit payload specification. (and better yet to just accept json rather than form encoded.)
Easy Excel Hacks - a.k.a becareful of what notes you put into your files - Page 1
Forum section: electronics / general

author: 16bitanalogue
author_rank: Regular Contributor
timestamp: December 30, 2024, 05:19:08 pm
content: I thought this was actually funny - and also helped me know that I wasn't the only one who had trouble understanding TI datasheet equations.TI's LMR33630-Q1 buck converter datasheet has several output capacitor equations for us lowly customers to design our circuits with. All well and good. But tell me dear reader, if you read the equations in the datasheet for COUT, they seem very complicated!I know I can refer back to my old notes, Robert Erickson's "Fundamental's of Power Electronics" or the numerous trainings by Basso to calculate an appropriate COUT value for a buck converter but god damn. I have seen many datasheets, forum posts, design notes, etc. where equations may differ depending on variable names which can be a little bit of a pain. Look at this equation:This is not obvious to me, I know how to calculate for COUT but this equation is strange. I am not the only one who thinks so, and if you go to TI's E2E forum you can find several threads about how to derive this particular equation. None of the threads answer the question; rather, most say "read this IEEE paper", "read Erickson's book", "Our Excel calculator matches the datasheet equation."https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1248817/lmr33630-design-equations-in-section-9-2https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/868717/lmr33630-q1-derivation-process-of-output-capacitance-formulahttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1191667/lmr33630-q1-the-different-of-the-calculation-of-cout-valueSure sure. But I have OCD and I want to know how the hell you arrived at this equation like other posters.The funny part. TI does provide an Excel calculator with some calculation sheets hidden. It is password protected, but this is Excel password protection which sucks. Getting passed the Excel sheet protection, there is a sheet with "notes". In the notes written from the TI engineer (emphasis mine):Now that is hilarious.Happy New Year, y'all.
Wiring the Christmas Tree Algorithm Puzzle - Page 1
Forum section: electronics / general

author: RAPo
author_rank: Super Contributor
timestamp: December 26, 2024, 04:03:54 pm
content: This was a charming puzzle:https://www.youtube.com/watch?v=2nP1UPxTnGQ.But now, for the real tricky question: how would you wire a set of 12 switches with the behaviour as indicated in the puzzle?
Metcal GT90: how to reset password?? - Page 1
Forum section: electronics / general

author: adiaz
author_rank: Newbie
timestamp: December 27, 2024, 12:35:08 pm
content: Hello! I’ve looked through all the literature and did various online searches but can’t find the method of resetting the admin password for this soldering station. Anyone know how? I can’t get rid of the “padlock” icon in the top right screen. Thanks in advance!

author: thm_w
author_rank: Super Contributor
timestamp: December 27, 2024, 10:10:27 pm
content: Contact Metcal support and ask.Correct section of the forum is here:https://www.eevblog.com/forum/reviews/
Merry X-mas to you all - Page 1
Forum section: electronics / general

author: Roehrenonkel
author_rank: Frequent Contributor
timestamp: December 24, 2024, 01:05:32 pm
content: ..may there be peace and happyness with you all.And light. 8-)Ciao4now

author: woody
author_rank: Frequent Contributor
timestamp: December 24, 2024, 01:47:17 pm
content: Bloody good idea, a nativity scene of tubes. Finally a way to sell a Quad monoblock to my better halfMerry X-mas!

author: Refrigerator
author_rank: Super Contributor
timestamp: December 24, 2024, 02:43:13 pm
content: Those heaters look like they're going to melt down.Merry xmas to you all, too.

author: squadchannel
author_rank: Frequent Contributor
timestamp: December 24, 2024, 02:56:48 pm
content: merry xmas, eevblogers:-+and what tubes?el34?

author: Xena E
author_rank: Frequent Contributor
timestamp: December 24, 2024, 04:23:22 pm
content: Directly heated triodes I hope!Happy holidays everyone.X

author: Roehrenonkel
author_rank: Frequent Contributor
timestamp: December 24, 2024, 08:59:49 pm
content: Quote from: Refrigerator on December 24, 2024, 02:43:13 pmHi Refrigerator,no they woun't. It's totally alright, they are "Hellglüher" (?bright glowers?) like most DHTs.Ever seen graphite glow? No? See below.... :-)(Graphite-Anode of a 845 unter full load)Hi Xena,yes, you'r right. Good eye.845 driven by 300B.Ciao4now

author: andy3055
author_rank: Super Contributor
timestamp: December 24, 2024, 09:49:07 pm
content: Ah! Nice one. Season's greetings to you all!

author: SiliconWizard
author_rank: Super Contributor
timestamp: December 24, 2024, 10:33:34 pm
content: Ho Ho Ho...!

author: Halcyon
author_rank: Unknown
timestamp: December 24, 2024, 10:41:37 pm
content: Stay safe everyone and happy holidays!

author: Bud
author_rank: Super Contributor
timestamp: December 25, 2024, 12:13:21 am
content: WTF he is holding in his right hand?

author: nctnico
author_rank: Super Contributor
timestamp: December 25, 2024, 01:06:22 am
content: Merry Christmas to everyone!
I liked evaluating my ORANGE Amp and Dual Low End Spkr - Page 1
Forum section: electronics / general

author: RJSV
author_rank: Super Contributor
timestamp: December 24, 2024, 07:30:39 pm
content: Hey there !I've managed to acquire a fairly decent system, for guitar practice and for general good low end (bass woofer). First, I wanted to make my evaluation comments, maybe helpful if you are into affordable audio.For good low end, the speaker output goes solely to the 10 inch 'Dual' brand (tm) loudspeaker box. The AMP having the usual cut-out switch, for when you've plugged in an external speaker.So, with solely the 10 inch speaker, the sound is a little lacking in crisp high frequencies but not too bad. Some folks would prefer having the 4 inch Amp speaker in parallel, but the convention is to cut the internal speaker.Either way though, I was first surprised at the audio having quite good reproduction of the 'gymnasium' reverb or hall echo ambience, in some particular recordings. That's not a nuance of the recordings I had even noticed before. The ORANGE Amp internal speaker did well, also, in conveying the 'gymnasium' ambience.My main focus, at first, was in trying to understand the unique method used, in the Amp back panel, for detecting if some AUX. input has been plugged into. At first it seemed like a Jack-switching contact was employed, (and still might), but turns out that the Amp will go into the powered state, when program material (sound) is coming in, on the AUX. stereo jack. That's cool.The AMP did the same ON/OFF thing when I plugged in my guitar, as there isn't any explicit power switch. (Although I haven't checked, if the Amp shuts down after a longer period of no input voltages, from my guitar.I like to evaluate audio pieces like this one, and notice the Dual brand speaker has Xtra low end, although lacking ear-piercing volume.For practice and for enjoyment playing videos, it's a good and moderate cost set.Now, I'm forced to practice my music theory more! Please also try to play the YouTube video, 'B.B.KING'. 'Rock-me Baby'sThat has the sweet licks on guitar, that we all can love!- - - Rick-Jack

author: RJSV
author_rank: Super Contributor
timestamp: December 24, 2024, 08:47:58 pm
content: I did have minor trouble, having to wiggle the AUX. In plug, sometimes. But stays stable if not moved around.The 9V battery life seems good, as it's still good, after couple of weeks (was included in the product).Now, all I have to do each time, is reach over and plug the stereo jack into my cell phone output headphone jack, and the Amp powers up.Arthritis happening in fretting hand, wrist...(didn't even know, lol).- - - Rick-Jack
The most dangerous power cord! - Page 1
Forum section: electronics / general

author: nctnico
author_rank: Super Contributor
timestamp: December 24, 2024, 04:22:04 pm
content: I received this yesterday and had a good laugh about the company name:

author: Siwastaja
author_rank: Super Contributor
timestamp: December 24, 2024, 06:48:13 pm
content: Optimized for transferring nuclear energy?
Cancer vaccine - Page 1
Forum section: electronics / general

author: u666sa
author_rank: Frequent Contributor
timestamp: December 19, 2024, 12:03:12 pm
content: 2025 this new drug will be tested on humans. On animals during the study melanomas and metastases were gone. "The tumor not only stops growing, but quickly dissolves within weeks."Vaccine is possible due to scientific advanced in mRNA technology which was used in Covid vaccine.This thing has touched pretty much everyone one way or the other, so decided to give you heads up, especially for those that need some type of hope. This vaccine is made by people who created vaccine against Ebola, so it's serious.News articleLink removed by admin

author: Ranayna
author_rank: Super Contributor
timestamp: December 19, 2024, 12:17:26 pm
content: This is not a vaccine in a common sense.I hate that the media runs with that term, just because tecniques that were used in vaccines are used here as well.This is not something general. It is *very* tailored to your specific cancer, so to speak. Most important: It does not do anything to prevent cancer you do not already have. It is not a vaccine, as the majority of people understand vaccines.Nevertheless: i have to say, i am very impressed by what i have read about that stuff so far.This is potentially life saving for a lot of people.

author: tom66
author_rank: Super Contributor
timestamp: December 19, 2024, 12:30:16 pm
content: Very impressive.

author: RoGeorge
author_rank: Super Contributor
timestamp: December 19, 2024, 12:41:40 pm
content: Either it will prove true or just yet another hype, this is grossly off topic for an electronics forum. There are other places to re-post and comment such news. Please follow the forum rules.https://www.eevblog.com/forum/chat/forum-rules-please-read/Quote

author: gnif
author_rank: Unknown
timestamp: December 19, 2024, 01:07:45 pm
content: Locked as this is off-topic and will only lead to arguments and/or conspiracy theories. This is not the place for these discussions.
non cut resistors - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: December 13, 2024, 04:36:24 pm
content: Most resistors are some kind of winding. Metal oxide, films, wirewound.. all have a helix structureWhich resistors are uniform. Composition resistors (ceramic, carbon) are one.Are there others?i.e. making a resistor controlled by deposition thickness only

author: TimFox
author_rank: Super Contributor
timestamp: December 13, 2024, 08:14:20 pm
content: Some carbon film TH resistors are not helixed (low resistance, high resistivity).For high-power RF applications, carborundum ("Globar") SiC resistors can be non-helixed.The Vishay RNC90 metal-foil resistors have a planar pattern that is "non-inductive" due to a serpentine pattern.[edit: changed RC90]

author: tooki
author_rank: Super Contributor
timestamp: December 13, 2024, 08:45:17 pm
content: Quote from: coppercone2 on December 13, 2024, 04:36:24 pmLook for "pulse" or "surge" resistant/tolerant thick-film resistors. Those want to avoid narrow bottlenecks that could become hotspots, so as I understand it, they do indeed work on the volume resistivity of the resistive thick film. I don't know whether they laser-trim those or not, and if they do, whether it's done the same way as on thin-film resistors.

author: tooki
author_rank: Super Contributor
timestamp: December 13, 2024, 08:49:27 pm
content: Quote from: TimFox on December 13, 2024, 08:14:20 pmYou sure about that model number? Google finds nothing at all for"vishay" "RC90" resistor.

author: daqq
author_rank: Super Contributor
timestamp: December 13, 2024, 08:59:08 pm
content: Specialty RF resistors are AFAIK structured in such a way that they are a resistive line. These fellas are a tad extreme, but they do get the point across:https://www.vishay.com/en/product/53086/Then there are special pulse rated resistors such as these monstrosities:https://www.hvproducts.de/wp-content/uploads/2021/04/washer_resistor.pdf. Ceramic composite are another material that's used in that way and also use their whole mass as a resistor.And of course higher current shunts - pretty much a slab of metal.

author: edavid
author_rank: Super Contributor
timestamp: December 13, 2024, 09:38:47 pm
content: Quote from: tooki on December 13, 2024, 08:49:27 pmI believe he meant RNC90.Datasheet:https://www.digikey.com/htmldatasheets/production/1313242/0/0/1/rnc90x-z-foil-mil.html

author: TimFox
author_rank: Super Contributor
timestamp: December 13, 2024, 09:58:43 pm
content: Oops--I corrected my post.

author: coppercone2
author_rank: Super Contributor
timestamp: December 13, 2024, 10:07:00 pm
content: that looks like a creative way to make a flat spiral
So Much Junk Being Sold - Now landscape wiring connectors - Page 1
Forum section: electronics / general

author: xrunner
author_rank: Super Contributor
timestamp: December 12, 2024, 01:16:33 pm
content: So much junk being sold ...Installed these new landscape wiring connectors in the Spring when I did a small project fixing up and cleaning up the landscape lighting outside my front door. I replaced the crappy connectors sold years ago which were starting to fail with this new design being offered by many sellers. They claimed this -22Pack Low VoltageWaterproofReplacement Landscape Light Cable ConnectorWaterproof? They have already failed. Yesterday I had to see why some of the LED lights were flickering. Turns out the connectors were completely ruined by water ingress. Corrosion ate them alive in less than a year.Like I said - so much junk being sold out there I can't keep up anymore.

author: Siwastaja
author_rank: Super Contributor
timestamp: December 12, 2024, 04:49:28 pm
content: Quote from: xrunner on December 12, 2024, 01:16:33 pmYou mean, like Aliexpress / Ebay? If yes, I'm not surprised.

author: xrunner
author_rank: Super Contributor
timestamp: December 12, 2024, 05:13:39 pm
content: Quote from: Siwastaja on December 12, 2024, 04:49:28 pmThe usual suspects of course, but these came from Amazon. I'm working on a product review with pics ...

author: Analog Kid
author_rank: Super Contributor
timestamp: December 12, 2024, 07:14:53 pm
content: Were those filled with any kind of gel, or just supposed to be a better (presumably water-resistant) design?The gel-filled ones are supposed to be pretty good, though I've never used them.A friend who did landscape lighting wiring said the hell with any connectors like these and just soldered everything. Sounds to me like the way to go.

author: xrunner
author_rank: Super Contributor
timestamp: December 12, 2024, 08:20:34 pm
content: Quote from: Analog Kid on December 12, 2024, 07:14:53 pmTurns out they were not filled with gel. I didn't take them all the way apart when I installed them because I didn't have to, to get the bottom wire in (the wire going to the LED light). The top of the thing connects to the main supply line with needle style probes like has been done forever for this type of wiring. The bottom is not filled with gel at all, and so there is nothing at all to keep out water. Anyone claiming these are waterproof or even water resistant needs to put away the crack pipe while writing.QuoteIrrigation wiring uses gel-filled connectors which work well to keep out the water.QuoteYes and that's what I'm contemplating doing from now on. I dunno who comes up with these types of designs for landscape lighting wiring connectors, but I don't think they hang out on this forum.
Bluetooth qualification process - Page 1
Forum section: electronics / general

author: Karel
author_rank: Super Contributor
timestamp: December 12, 2024, 10:59:39 am
content: When using a certified bluetooth module with integrated antenna (e.g. from Silicon Labs or Laird) in another product andusing the preprogrammed vid and pid that comes with the module, does one need to go through the bluetooth qualification process (and pay 11,000 dollar) or not?Ofcourse, bluetooth sig thinks you should but what are your thoughts?

author: bookaboo
author_rank: Frequent Contributor
timestamp: December 12, 2024, 11:38:54 am
content: If you meanhttps://www.bluetooth.com/develop-with-bluetooth/qualify/then as far as I know you only need that if you want to market your product as Bluetooth and/or use their logo. We have a few devices that connect to Android and IoS over BLE, but we don't market them as "Bluetooth" so we don't bother with Bluetooth Qualification.Whether you pre-qualify or not is up to Bluetooth Sig, it's their standard so they can enforce how they please.Regulatory compliance is a separate issue, you will still have to go through RED or whatever is applicable for your market(s). Having pre-certified modules here certainly helps keep complexity and costs down, but you can't rely only on those.

author: Siwastaja
author_rank: Super Contributor
timestamp: December 12, 2024, 12:03:38 pm
content: Their website explains it clearly: it applies to a product and does not inherit from other designs. But it's just a marketing fee to use their trademarked brand and logo, nothing technical. Just don't use their logos, job done.

author: tom66
author_rank: Super Contributor
timestamp: December 12, 2024, 01:36:21 pm
content: You need to do it to use any Bluetooth trademark including the logo. If you call the function "BT" then you can probably get away with it, as long as you don't use the Bluetooth rune or any other trademark (like "BLE").There are potentially patents and IP that you do not pay royalties for if you use a module without paying Bluetooth SIG, but arguably those are a matter for the module manufacturer... so it is a bit of a legal grey area (and the people that will advise you on the realities here are not cheap).Any intentional radiator will need to go through your market's appropriate certification, but it may be possible to transfer the certification if you use a PCB antenna built into a module and comply with the manufacturer's recommendations there. If you use your own antenna, you almost certainly have to do the RF certification.