hybridfree/eevblog-posts huggingface dataset:
Headlamp 18650 battery real capacity - Page 1
Forum section: electronics / general

author: ASICS
author_rank: Contributor
timestamp: June 18, 2024, 01:53:15 am
content: Last time I suspected the headlamp 18650 battery 2000mAh false, I tested the4.145V, end 2.8V, battery capacity only 1.23Ah, 4.63Wh.https://www.eevblog.com/forum/chat/buy-a-new-18650-battery-for-my-headlamp-i-suspect-the-labeled-capacity-is-bogus/msg5540567/#msg5540567

author: ASICS
author_rank: Contributor
timestamp: June 18, 2024, 01:54:43 am
content: Test discharge curves and results

author: jmelson
author_rank: Super Contributor
timestamp: June 20, 2024, 04:06:59 pm
content: Quote from: ASICS on June 18, 2024, 01:53:15 amReally, I would not be terribly upset with only getting 62% of rated capacity. I got some 10 AH Ni-Cd D cells that would only last 20 minutes in my maglite. I recharged them numerous times and then just gave up and ordered some 2 AH Ni-MH cells and these are lasting for months of use in the shop. In fact, I have YET to need to recharge them!I KNEW there was no way to get a real 10AH into a D cell, but I expected at least a couple AH capacity. And, by weight, these were not empty cans.Jon

author: David Hess
author_rank: Super Contributor
timestamp: June 20, 2024, 06:27:52 pm
content: 18650 cells should be up to about 3.5 amp-hours, but could be as low as 1.3 amp-hours.Quote from: jmelson on June 20, 2024, 04:06:59 pmThe 10 amp-hour NiCd D cells had to be counterfeit. Nominal capacity for a real NiCd D cell is about 4.0 amp-hours. Consumer grade NiCd D cells were usually a 1.2 amp-hour C cell inside of a D cell enclosure.NiMH cells should be about 4 times the capacity of the equivalent NiCd cell, and I have a set of 12 amp-hour NiMH D cells.

author: ASICS
author_rank: Contributor
timestamp: June 21, 2024, 06:50:04 am
content: These batteries are so easy to fake.I purchased some random LG, Samsung and Panasonic batteries.It turned out they were all fake.It's best to buy batteries from regular sources, reputable vendors sell fakes too.

author: arjen
author_rank: Contributor
timestamp: June 21, 2024, 03:04:20 pm
content: I've had similar experiences where the labeled capacity didn't match up with the actual performance. Testing voltages and capacity like you did is a good move to verify things.
I stubbornly randomly ordered LG, Samsung, and Panasonic 18650 - Page 1
Forum section: electronics / general

author: ASICS
author_rank: Contributor
timestamp: June 21, 2024, 08:47:29 am
content: I stubbornly randomly ordered LG, Samsung, and Panasonic 18650.Let's see if the crooks are everywhere.I've written before about how to recognize a good 18650, but it's still not rigorous enoughI'll start with a self-examination
New Laws and Detection limits?  PPM PPB PPT - Page 1
Forum section: electronics / general

author: joeqsmith
author_rank: Super Contributor
timestamp: June 21, 2024, 03:19:35 am
content: I was reading the news about Minnesota's new laws on PFAS.Quotehttps://www.health.state.mn.us/communities/environment/water/pfasvalues.htmlDetecting such low levels in any reasonable time seems like a story in of itself.Quotehttps://www.pca.state.mn.us/sites/default/files/p-gen1-22h.pdf

author: Someone
author_rank: Super Contributor
timestamp: June 21, 2024, 04:06:46 am
content: If you're interested in the measurement methods:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7407801/doi: 10.3390/mi11070667
AU / NZ : Could somebody help me buy a part for my vacuum and ship it to the US? - Page 1
Forum section: electronics / general

author: jchw4
author_rank: Regular Contributor
timestamp: June 18, 2024, 07:15:25 am
content: I have an old Electrolux Ergorapido vacuum (probably 2013 model) and need a new bellows part for it (part A13098601 or 98063007 or 4055630273).Google suggests that it's only available in Australia and New Zealand. But I could not find a store that would agree to ship it to the US.Even Ebay sellerhttps://www.ebay.com.au/itm/304212036306said "Australia only".I don't know what's so special about this part, but could somebody help me get it? I can probably pay with PayPal.(Given the rarity I probably need 2.)Or maybe are there any services that can do it?

author: soldar
author_rank: Super Contributor
timestamp: June 18, 2024, 02:54:06 pm
content: Maybe you can try some courier service which could pick it up and ship it to you?

author: mendip_discovery
author_rank: Super Contributor
timestamp: June 18, 2024, 06:26:56 pm
content: Order it and have it delivered to Dave, would make for an interesting mail unboxing posting.

author: mairo
author_rank: Unknown
timestamp: June 19, 2024, 01:23:34 am
content: For a service usehttps://www.packsend.com.au/Give them a call - use the closest branch:PACK & SEND Epping14/82 Gateway Boulevard, EPPING, VIC, 307603 9100 3553epping@packsend.com.auAsk if you can sent an eBay package to them and they to resend to you after that in the states. I have done this with them several times.Do call/email first to confirm.

author: jchw4
author_rank: Regular Contributor
timestamp: June 19, 2024, 05:32:24 am
content: Quote from: mairo on June 19, 2024, 01:23:34 amWow! Thank you very much!This is exactly what I need.In the mean time I started looking for "rectangular hose" and found similar looking parts on aliexpress. Aliexpress is simpler, so I'll probably try it first.
Raspberry Pi IPO - Page 1
Forum section: electronics / general

author: SiliconWizard
author_rank: Super Contributor
timestamp: June 17, 2024, 12:52:39 am
content: https://www.raspberrypi.com/news/raspberry-pi-ipo/Is that good news? What do you think?

author: brucehoult
author_rank: Super Contributor
timestamp: June 17, 2024, 01:41:37 am
content: Separating the for-profit and charity operations is a good thing, and this makes it more clear.The dev board landscape has vastly improved since R Pi started, and they no doubt were instrumental in pushing that in the early years, at least in pricing (since eclipsed by Chinese companies) and documentation / examples / educational materials etc (still the leader there). Sadly their boards are not actually very open source or documented at the bootstrap level.The RP2040 is by far their most innovative product. The original Pi Zero the worst, especially in pretending it was $5, which was never a real price (the Pi Zero 2 seems to be realistically priced).The Chinese companies are less transparent about subsidies they have -- they probably break even (or better) on a unit basis, but their NRE is surely never recovered unless they're selling many millions of them to the government for use in surveillance systems (which given they always in the last decade have NPUs seems likely).I wouldn't invest ... and let's see what happens with prices.

author: SiliconWizard
author_rank: Super Contributor
timestamp: June 17, 2024, 02:44:20 am
content: Hard to tell, indeed, what's gonna happen, so certainly a bit too early to invest. Also assuming you like the direction they take.They do "deserve" it for sure, but it's a double-edged sword. I'm afraid prices will inevitably tend to go up, and they are likely to focus on hype stuff such as AI everything.Yes the RP2040 was pretty innovative, and rather unique. You probably know that it was actually designed *after* the RP1 (sure, it's the RP2), the IO chip in the RPi5, which contains a similar PIO - it was initially designed for the RP1. I think the RP2 project came later as some kind of "why not" thing, reusing a number of blocks in the RP1, and it worked.But precisely, I'm absolutely not sure they'll have the opportunity to lead a similar project under the pressure of shareholders.

author: ataradov
author_rank: Super Contributor
timestamp: June 17, 2024, 03:14:50 am
content: This is bad, IMO. Non-profit stuff will start to get less attention and eventually will be closed, resulting in one more shareholder-driven rent-seeking enterprise.

author: thermistor-guy
author_rank: Frequent Contributor
timestamp: June 17, 2024, 07:22:19 am
content: Raspberry Pi Holdings, price quote:https://www.barchart.com/stocks/quotes/RPI.LN/overview
I have some mercury switches - Page 1
Forum section: electronics / general

author: soldar
author_rank: Super Contributor
timestamp: June 15, 2024, 01:07:48 pm
content: I have some mercury switches. These used to be common 50 years ago but have disappeared. I have no idea what current and voltage they can safely carry or break.The small ones are a cylindrical glass bulb, about 5 mm diameter and 15 mm long and have a drop of mercury inside. I am thinking of making a float switch with a wine bottle cork stopper. Drill a hole from one end, insert the mercury bulb with thin, flexible cables, well sealed and put the cork pivoting on a wire so when it floats the mercury closes the contacts. The electrical part seems quite straightforward but I need to think about the mechanical part . I need it to not be subject to corrosion and have a heavy base which will hold it in place. I am thinking of a piece of brick cut into a U shape with the float in the center. I need to think about this. Y think I would only use them as sensors with low voltage and current. Or maybe they could handle, say, 2 Amps at 12 V?I also have a big mercury switch, (12 x 65 mm) which came from a mechanical timer designed to switch many amps at 220 V. I suppose relay contacts would not last as long due to sparking and corrosion. When this thing tilts over the break is quite fast and I suppose there is no oxygen inside the capsule. It has a central, common terminal and one at each end (NO & NC). When it is horizontal all three terminals are connected so it is "make before break". I cannot think of any practical use for it today but it would be fun to put it to some use where it could be seen and admired in action. I could design an "over center" mechanism so the mercury bulb would only be stable tilted to one side or the other."over center" mechanism:

author: Gregg
author_rank: Super Contributor
timestamp: June 15, 2024, 05:09:59 pm
content: Tiny mercury switches used to be common for automobile under hood and under trunk lid switches that would automatically turn on the light when the lid was raised. They were approximately 6mm in diameter and 10mm long and fit in the lamp socket. Power was from the parking light circuit to prevent battery drain. Some were glass and some were Bakelite.A lot of larger mercury switches were common in the HVAC industry for rotating temperature controls; a common brand was Mercoid.
Breadboard therapy? - Page 1
Forum section: electronics / general

author: paulca
author_rank: Super Contributor
timestamp: June 13, 2024, 10:08:54 pm
content: https://www.youtube.com/shorts/fKz27k4lq2E

author: tggzzz
author_rank: Super Contributor
timestamp: June 13, 2024, 11:09:55 pm
content: Pretty, but fun when it is turned over for solderingFirst logic I worked on professionally used similar techniques. Nowhere near as pretty, and the signal wires wereallpink PTFE.
Starlink and Co bad for ozon hole - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: June 13, 2024, 07:35:51 pm
content: Satellite “megaconstellations” may jeopardize recovery of ozone hole:https://news.agu.org/press-release/satellite-megaconstellations-may-jeopardize-recovery-of-ozone-hole/The aluminum oxide left behind when a satellite burns up entering the Earth’s atmosphere destroys the stratospheric ozone.

author: RoGeorge
author_rank: Super Contributor
timestamp: June 13, 2024, 07:42:33 pm
content: Another "Elon bad" in mainstream media.What did he do to the establishment this time?

author: wraper
author_rank: Unknown
timestamp: June 13, 2024, 08:07:23 pm
content: I'd like to see any evidence how alumina damages the ozone layer as it's extremely inert. I googled a bit and found nothing other than this just released shit.

author: m98
author_rank: Frequent Contributor
timestamp: June 13, 2024, 08:15:59 pm
content: To link this exclusively to Starlink is obviously laughable. Interestingly, with cheap, high-capacity launchers like Starship on the horizon, aluminium might get mostly replaced by steel and (more) composites, if this issue is determined to be bad enough.

author: madires
author_rank: Super Contributor
timestamp: June 13, 2024, 08:21:02 pm
content: Quote from: wraper on June 13, 2024, 08:07:23 pmA global modeling study of solid rocket aluminum oxide emission effects on stratospheric ozone:https://typeset.io/papers/a-global-modeling-study-of-solid-rocket-aluminum-oxide-4usc5pi822

author: wraper
author_rank: Unknown
timestamp: June 13, 2024, 08:31:09 pm
content: Quote from: madires on June 13, 2024, 08:21:02 pmIt's about SRBs and from what I've seen the damage is done by chlorine emitted from those which can be activated by alumina emitted from those as well.In any case it's laughable because a few rockets with SRBs like Atlas V, Vulcan Centaur, Ariane 6, SLS will emit more alumina than all of those satellites burning, not to say chlorine and other stuff.
Is this a scam site? - Page 1
Forum section: electronics / general

author: PlainName
author_rank: Super Contributor
timestamp: June 12, 2024, 08:16:30 am
content: Or a web dev filling blank space with AI?https://www.alliedcomponents.comLooks pukka initially but dig down and...Quote from:https://www.alliedcomponents.com/blog/maximum-voltage-across-resistor

author: Psi
author_rank: Super Contributor
timestamp: June 12, 2024, 08:23:14 am
content: That is 100% AI created text.

author: ArdWar
author_rank: Frequent Contributor
timestamp: June 12, 2024, 08:47:11 am
content: Looks like your standard US front company for East Asian manufacturers. Nothing particularly unusual tbf. Blog posts about a too basic stuffs are just extra fluff there and you can practically ignore them. It's part of their SEO or something.

author: PlainName
author_rank: Super Contributor
timestamp: June 12, 2024, 12:29:17 pm
content: QuoteClearlyQuoteOh, haven't stumbled across one before, that I'm aware of. Maybe Farington knows about them!Even so, you'd think a human eye would pass over them before they illustrate to world+dog that they know nothing about their business.

author: wraper
author_rank: Unknown
timestamp: June 12, 2024, 12:35:43 pm
content: https://www.digikey.com/en/supplier-centers/allied-components-international

author: MT
author_rank: Super Contributor
timestamp: June 12, 2024, 12:57:49 pm
content: https://www.google.com/maps/@33.6757772,-117.6537679,3a,75y,255.34h,94.34t/data=!3m6!1e1!3m4!1sWFnk0UNDQDLTddF4QFgxog!2e0!7i16384!8i8192?coh=205409&entry=ttu

author: PlainName
author_rank: Super Contributor
timestamp: June 12, 2024, 06:00:38 pm
content: Quote from: wraper on June 12, 2024, 12:35:43 pmGives me a 404.

author: PlainName
author_rank: Super Contributor
timestamp: June 12, 2024, 06:03:03 pm
content: Quote from: MT on June 12, 2024, 12:57:49 pmBeats me how they can let their website host such blatant cobblers.

author: wraper
author_rank: Unknown
timestamp: June 12, 2024, 08:06:32 pm
content: Quote from: PlainName on June 12, 2024, 06:00:38 pmEither was a temporary glitch on digikey side or something wrong on your side. Works fine for me.

author: PlainName
author_rank: Super Contributor
timestamp: June 12, 2024, 10:06:06 pm
content: Quote from: wraper on June 12, 2024, 08:06:32 pmWorks now but only if I use the US site. Earlier, when I use the UK site it couldn't find them in its list of suppliers, so perhaps it's a country thing.Edit: went to get a listing of the suppliers from each site, and now that link gives a 404, presumably because I have the UK site open in another tab. Nevertheless I took a screeny of the appropriate part of their A-Z.
Faster RS232 communication with fluke 8846a for measurement - Page 1
Forum section: electronics / general

author: manvi
author_rank: Newbie
timestamp: June 11, 2024, 10:23:17 pm
content: I’m using Fluke 8846A for measuring current in a setup where the current range is set to 10A. I’m using MEASure method to read value from Fluke 8846a using RS232 communication at baud rate of 115200 with one stop bit and no parity in remote mode. The time taken from the query to receiving the response is roughly 275ms which is a bit high for my application. I would ideally want it to be less than or equal to 50ms. Is there a way to make this communication faster?Also I’m trying to synchronize this reading from another source so I want to collect data by single trigger which I think MEASure method provides.Code snippet used for profiling:query_msg = "MEAS:volt:dc? 10\r"ser.write(query_msg)# Receive data untilprint(time())received_data = ser.read(17)print(time())Time printed(s) in terminal:1717717621.22614051717717621.5009155

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 12, 2024, 02:58:21 am
content: I haven't worked with that particular meter but does it have a "streaming" mode where it gets set once and then just sends each reading to the PC?

author: rcjoy
author_rank: Regular Contributor
timestamp: June 12, 2024, 07:31:25 am
content: The 8846A Programmers Manual gives several recommeded settings for fast measurements.See the section titled "Optimizing System Speed for I/O Operation" on page 3.

author: Gertjan
author_rank: Frequent Contributor
timestamp: June 12, 2024, 07:44:22 am
content: Hi Manvi,Are you using a low resolution setting on your 8846A? (For example 4,5 digits or 0.02NPLC) When using high resolution the meter needs a longer integration time. (100NPLC = 100 power line cycles = 2 seconds integration time @ 50Hz mains)See the 8846A specifications:4486A-measurements-rates-1000pix.pngSo when set to 4.5 digits / 0.02NPLC the meter should be plenty fast for your application. When you need more resolution 5.5digits / 0.2NPLC might work too. It is a balance between resolution and speed really....See note 1 for more suggestions for speed improvement (display off, auto range off, math off)Also see note 4: Your RS-232 speed of 115200baud is mentioned as having a maximum measurement speed of 711 measurements per second. So that should not be a limitation too.Regards, Gertjan.
No output from FPGA lcmxo2-256hc-4sg32c. Getting Hot  - Page 1
Forum section: electronics / general

author: tbegal
author_rank: Newbie
timestamp: June 11, 2024, 10:15:38 am
content: Can FPGA configuration be cloned from working board and transferred over to replacement. What the easiest way top get a replacement in? Tool to do the job.. Circuit pics attached. DAC

author: tom66
author_rank: Super Contributor
timestamp: June 11, 2024, 03:12:27 pm
content: Very unlikely to be possible if the FPGA gets 'hot' as you will not be able to interface with a fried device over JTAG. If you have the original bitstream or another working board it may be possible.

author: tbegal
author_rank: Newbie
timestamp: June 12, 2024, 07:01:24 am
content: I have a working board.Any recommendations for the best "affordable" tool to copy configuration over to the replacement?Lattice Silicon
Help Identifying/sourcing a strange faston connector - Page 1
Forum section: electronics / general

author: BMK
author_rank: Regular Contributor
timestamp: June 10, 2024, 11:58:09 pm
content: Tried asking this a while back in the 'What is this compnent thread, without any success.Dates from early '80s. Is thru hole mounted on a PCB. Takes 0.25" faston on one side, and a PCB edge connector on the other. Allows a 3-way interconnect between the Faston tab, The PCB it is soldered through and pcb daugher card in the edge connector.Possibly AMP branded. Any help appreciated.
BLOW my FULL-LENGTH pcie card !!!! - Page 1
Forum section: electronics / general

author: frogblender
author_rank: Regular Contributor
timestamp: June 06, 2024, 02:51:11 pm
content: I'm designing a rather formidable pcie card: ~250W, double-slot. And full-length, of course.I want a cooling setup as shown below. These blowers used to be popular in GPUs, but have since fallen out of favor (in the consumer GPU market).The blowers go by the name "frameless blower" or "motorized impeller" or some such, and I can't find a source for them anywhere(something like this:https://coolcox9.en.made-in-china.com/product/nxIREBsUJNcl/China-D74X25mm-Frameless-Blower-DC-5V-12V-24V-7525-74mm-Centrifugal-Fan.htmlwould be perfect, except it is a wimpy 4watts; I figger I need at least 15W.Does anyone know a manufacturer for these frameless blowers?

author: nctnico
author_rank: Super Contributor
timestamp: June 06, 2024, 03:09:18 pm
content: Is there no way to use a few 40mm fans? With the end of the card sitting next to the front of the casing due to the length, this could even be better in terms of sucking air from the front instead of from the inside of the PC.

author: frogblender
author_rank: Regular Contributor
timestamp: June 06, 2024, 03:32:24 pm
content: Quote from: nctnico on June 06, 2024, 03:09:18 pmExactly. That is Plan B. The pitch between double-wide pcie cards is 40.64mm. So 40mm fans will fit, but will violate the max-allowable-thickness in the pcie spec (spec says 39-point-something mm - can't remember exactly... so the violation is 100's of microns... which'd be fine by me). 40mm fans would also be a bit noisier, two would be slightly pricey.... but the #1 drawback is my boss: she's never seen such a setup on a production board, so that's thatThe benefit of 40mm fans is that, thanks to the 1U server market, you can get buy hugely-powerful ones - when a60-watt40mm fan starts to spool up, people run for cover, cuz it sounds like sh*t's about to go down; they are comically loud.

author: langwadt
author_rank: Super Contributor
timestamp: June 06, 2024, 04:11:19 pm
content: https://ie.rs-online.com/web/p/centrifugal-fans/0251132

author: tooki
author_rank: Super Contributor
timestamp: June 07, 2024, 08:37:54 am
content: Quote from: frogblender on June 06, 2024, 02:51:11 pmThey are readily available from major electronics component distributors. This means companies like DigiKey, Mouser and Farnell, not Amazon and eBay.

author: Ranayna
author_rank: Super Contributor
timestamp: June 07, 2024, 08:50:36 am
content: These types of coolers are likely having a comeback soon-ish.Both nVidia's and AMD's next generation of GPUs are rumored to go back to smaller coolers with radial fan, at least for some of their cards.

author: 5U4GB
author_rank: Super Contributor
timestamp: June 10, 2024, 08:57:08 pm
content: Quote from: frogblender on June 06, 2024, 02:51:11 pmIf you search under the name "squirrel cage blower", which seems to be what you're describing, you'll find lots of sources.
atmel 7 hates my windows 11 - Page 1
Forum section: electronics / general

author: ulao
author_rank: Contributor
timestamp: June 07, 2024, 03:52:58 am
content: Hi all, I'm not to studio 7. I have been using win7 and 6 for far too long.I have a project that s makefile driven. I can compile it fine on windows 11 with studio 6 but doing a clean or build I see thisusr/bin/sh: fork: Resource temporarily unavailable0  sh 10808 sync_with_child: child 10264(0x1E0) died before initialization with status code 0xC000014224  sh 10808 sync_with_child: *** child state waiting for longjmpit will make a hex file and I can use this. studio 6 is using WINAVR.(Yes I have the new dll for winavr)on 7 I get the same thing but also seeSeverity Code Description Project File LineError recipe for target 'GPA.eep' failed GPA S:\blissbox\SOURCE_FILES\bridge\bridge\shared\LUFA\Build\lufa_build.mk 281on a lufa MK file. and can not build because of this.So what I want to know is how can I pick another tool chain on studio 7? Using the UI toolchian seems like its ignoring what I set to default. I think its still using WINAVR? but I have no way to know. Every tool chain I put on here compiles the same way. If I try to use the extension manager it just freezes during download.I'm not really good with all the configuration in the 100;s of IDE's I use. I just can not be good at it all. the AVR forms are full of unhelpful people that have no undestanding that some of us just need help.So I guess what I'm hoping to figure out is:1) Can I fix there errors2) can I change the toolchain using a MAKEFILE project?
That new 12VHPWR that burns your house down:  is upright version available?? - Page 1
Forum section: electronics / general

author: frogblender
author_rank: Regular Contributor
timestamp: June 06, 2024, 07:00:57 am
content: In regards to that new "12VHPWR" gpu power connector (which, fyi, is already obsolete, having been replaced in CEM5.1 by the "12V-2x6" connector, which is exactly the same thing, except less likely to burn your house down):I am looking for a pinthru PCB-mount version that is:upright, instead of the usual lay-flat. The lay-flat hogs too much of my PCB board edge.I *almost* found an upright (see photo)... but it suffers from a severe case of "Dude, where's my sidebands?" (it is missing the four signal pins that the lay-flat has, and the spec requires you to have, IIRC).So anyone know a PN for anupright12VHPWR/12V-2x6 connector?

author: HwAoRrDk
author_rank: Super Contributor
timestamp: June 06, 2024, 12:09:33 pm
content: You mean 'upright' as in the pins are still at right-angle, but the short side of the connector is adjacent to the PCB? As opposed to the common 'vertical' connectors where the pins point upward, perpendicular to the PCB.Somehow I doubt you'll find such a thing, because I don't think these connectors have any applications outside of the PCIe GPU field that they were invented for, and so the connector manufacturers are only producing parts that the GPU manufacturers are using - which doesn't include such an oddity as an upright connector.

author: frogblender
author_rank: Regular Contributor
timestamp: June 06, 2024, 03:45:12 pm
content: Yes, exactly as you state: upright, not vertical. Mating is parallel to the PCB.

author: langwadt
author_rank: Super Contributor
timestamp: June 06, 2024, 04:00:00 pm
content: put it on separate pcb and mount that vertically on the main pcb either soldered in a slot or with a right angle connector

author: frogblender
author_rank: Regular Contributor
timestamp: June 07, 2024, 03:07:42 pm
content: Quote from: langwadt on June 06, 2024, 04:00:00 pmYup.. I did exactly that: a small, cheap, beautifully-contoured 6-layer pcb with 2oz copper, with the RA pthru headers you speak of. Alas, the risk-averse boss, having never seen such a thing on a production board before, gave me the big fat NO

author: langwadt
author_rank: Super Contributor
timestamp: June 07, 2024, 04:39:42 pm
content: Quote from: frogblender on June 07, 2024, 03:07:42 pmit's really no different than a pci card, a pcb mounted vertically to get more room for connectors
Cal Resistor set, CARE-less packing/shipping frustrations - Page 1
Forum section: electronics / general

author: Vertamps
author_rank: Contributor
timestamp: June 06, 2024, 08:17:16 pm
content: I purchased my first set of old style calibration resistors from an reseller. Real lack of care in packing, like really?(used/very dirty and broken bubble wrap, thin amazon box) FYI i did pay $442 to get these, which not a bad deal for me i think. But what damage may come of oil filled resistors clanking around, probably took a few good hits getting here.https://youtube.com/shorts/rJtIEQiT20Q?si=ew8t9rvTsdjBYeDb

author: Vertamps
author_rank: Contributor
timestamp: June 07, 2024, 08:59:49 pm
content: They offered me a substantial refund %, so ill be keeping these. The 10k is +48ppm, but my meter is fairly uncertain at the moment, im just curious if the resistors are fairly stable.
Working on new project. Feedback appreciated.  - Page 1
Forum section: electronics / general

author: davidpeters74
author_rank: Newbie
timestamp: June 18, 2024, 06:02:32 pm
content: Hi everyone,My name is David, and I just joined this forum. I joined to connect with all the amazing minds here and get honest feedback on my new blog about turntables and record players.https://turntabletrends.com/I created this website because I was born into a family of audiophiles and have been around record players since childhood.Please give your honest feedback on the website. Also, let me know any blog ideas or issues I can cover in my blog, especially if you already own a turntable.Also as many of you probably have more electrical knowledge than me, can anyone tell me how to ground a turntable?I didn’t want to spam this amazing forum, so I tried to write this in the best way possible.Thanks for letting me be part of this forum.

author: pcprogrammer
author_rank: Super Contributor
timestamp: June 18, 2024, 07:02:36 pm
content: Quote from: davidpeters74 on June 18, 2024, 06:02:32 pmIf done well, you don't. Only ground your amplifier and by connecting your turntable to the amplifier the signal shields and returns are grounded. By also grounding the turntable you can create ground loops that in turn can add noise to the sound.

author: davidpeters74
author_rank: Newbie
timestamp: June 19, 2024, 09:42:22 am
content: Thanks for clearing my doubt mate. Appreciate the help!Have a great day ahead!
Audiophile forums in Australia? - Page 1
Forum section: electronics / general

author: confusion
author_rank: Contributor
timestamp: June 04, 2024, 10:47:44 am
content: Hi,I'm trying to get a rough valuation on a couple of higher end speakers I'm trying to sell.Does anyone know the right place to ask? Any Australian audiophile forums? Not really my wheelhouse.x2 Satellites - Sib Focal-JMlabThank you

author: gbaddeley
author_rank: Regular Contributor
timestamp: June 06, 2024, 07:58:32 am
content: Stereonet.com > forums
I don't know,  but news feed saying;  72 hours notice upgrade system.    ? - Page 1
Forum section: electronics / general

author: RJSV
author_rank: Super Contributor
timestamp: June 04, 2024, 10:50:02 pm
content: The force-fed news, on Google screen saying ' 'you have 72 hours to 'upgrade browser.'I don't know much more, but it has been at the top of the push-fed news they put out for us to gobble on.Sorry, didn't have time to read, and I get lost in op sys details anyway...

author: soldar
author_rank: Super Contributor
timestamp: June 04, 2024, 11:08:51 pm
content: https://www.forbes.com/sites/zakdoffman/2024/06/03/google-chrome-warning-72-hours-to-update-or-delete-your-browser/

author: SiliconWizard
author_rank: Super Contributor
timestamp: June 04, 2024, 11:09:56 pm
content: Not sure I got it - does that mean that this notice was forced by a government agency?

author: jpanhalt
author_rank: Super Contributor
timestamp: June 04, 2024, 11:17:10 pm
content: This (attached) is the only message I get from Chrome. If it stops working, I will change browsers and the advertising I get with it. Maybe it's something related to security in the newest version?

author: RJSV
author_rank: Super Contributor
timestamp: June 05, 2024, 12:58:43 am
content: Thanks, but I'm surprised, to be only person seeing that, over last couple of days.I was the one paid for this phone, but I'm all complained out, at this time...(Maybe later, I'll complain, about yet another loss of control, of my own property!)

author: RJSV
author_rank: Super Contributor
timestamp: June 05, 2024, 01:02:07 am
content: Perhaps they want to force the Account Sign-up, which I'm against doing right now.Sorry, must create account, ...type of deal.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: June 05, 2024, 03:31:56 am
content: From what I have heard your news feed sensationalized a report that some users of computers in government offices were several revisions behind on security updates and were given an ultimatum to update their work computers. While you should probably keep up with security updates on your personal gear there were no ultimatums to the general population.

author: Halcyon
author_rank: Unknown
timestamp: June 05, 2024, 04:27:33 am
content: Not sure why anyone bothers with Chrome these days. Switch to Brave. Both Chromium based, but Brave is faster and offers better security in terms of blocking threats, scripts etc...
Pole mounted mains transformer replacement video - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: June 04, 2024, 02:00:16 am
content: Interesting to watch, real time change out of a blown pole mounted transformer.

author: Gyro
author_rank: Super Contributor
timestamp: June 04, 2024, 12:47:42 pm
content: You'd be far better linking the Bobsdecline youtube channel rather than a specific video. Lots of interesting Utility related stuff from a Lineman...https://www.youtube.com/c/Bobsdecline/videos
Ground is a Myth! 2024 ARRL National Convention - Page 1
Forum section: electronics / general

author: coppice
author_rank: Super Contributor
timestamp: June 02, 2024, 01:45:48 am
content: I had to solve a major ground plane problem many years ago. Poor resolution in the control of some of the plane's systems was causing a lot of ground up plane to accumulate in some gearboxes.
Tool to terminate bad Gov's, Neighbours, EV's, Test Equipment, Solar roads, etc. - Page 1
Forum section: electronics / general

author: MT
author_rank: Super Contributor
timestamp: May 29, 2024, 12:41:42 am
content: https://neal.fun/asteroid-launcher/

author: Andy Chee
author_rank: Super Contributor
timestamp: May 29, 2024, 02:34:52 am
content: I prefer nukemap:https://nuclearsecrecy.com/nukemap/Maneuvering asteroids into a desired trajectory, isn't as practical as building a nuclear weapon.

author: Kim Christensen
author_rank: Super Contributor
timestamp: May 29, 2024, 03:47:31 am
content: I feel that both those underestimate the true devastation. Especially the asteroid one.

author: Faranight
author_rank: Unknown
timestamp: May 29, 2024, 06:09:07 am
content: I just tested it on Moscow. It works.

author: RJSV
author_rank: Super Contributor
timestamp: May 29, 2024, 04:30:30 pm
content: Way things are going, best not to do this (thread). That is to say, snarky 'jokes' are literally actual hate speech, packaged as snarky. Classic response is maybe you talk about YOUR MOTHER that way....ha ha ha haI know I'm no saint, when it comes to self-control, here. I post some inappropriate stuff before, but maybe Readers here can forgive my 'scolding' tone!Hate speech is OK, against Hitler...Blah blah.now...continue on, if you please

author: Andy Chee
author_rank: Super Contributor
timestamp: May 30, 2024, 06:45:37 am
content: Quote from: Kim Christensen on May 29, 2024, 03:47:31 amFor verification, I simulated a 0.5kT nuke in the Port of Beirut, Lebanon.Its calculation of damage radius, injuries, and cloud height, are in the ballpark with the actual results from the 2020 port explosion. Crater size was underestimated, fatalities were overestimated.

author: Faranight
author_rank: Unknown
timestamp: May 30, 2024, 08:02:23 am
content: Hmm, I just sent an asteroid to the middle of a pacific ocean. It made a huge crater in the water. I wonder, how that works.

author: Andy Chee
author_rank: Super Contributor
timestamp: May 31, 2024, 03:38:41 am
content: Quote from: Faranight on May 30, 2024, 08:02:23 amI'd imagine the crater dimensions would be the equivalent of the size of the water depression pushed away by the blast pressure.Once the blast pressure dissipates, the water would simply flow back into and reoccupy the space.
ARRL and LoTW sites hacked? - Page 1
Forum section: electronics / general

author: iMo
author_rank: Super Contributor
timestamp: May 30, 2024, 09:11:13 am
content: What happened with those sites?

author: xrunner
author_rank: Super Contributor
timestamp: May 30, 2024, 11:09:06 am
content: Quote from: iMo on May 30, 2024, 09:11:13 amhttps://www.arrl.org/news/arrl-systems-service-disruption

author: Sal Ammoniac
author_rank: Super Contributor
timestamp: May 30, 2024, 07:18:24 pm
content: Word is the ARRL's ISP was hacked and that took down all or most of the ARRL's internal systems, including their phone system and the Logbook of the World.It's been over a week now and the LoTW and other ARRL systems are still down.

author: iMo
author_rank: Super Contributor
timestamp: May 31, 2024, 06:48:24 am
content: It is 2weeks already..The lost LoTW would make hams pretty unhappy.. Looks like ransomware, otherwise to restore from a backup cannot take 2 weeks, imho.

author: mendip_discovery
author_rank: Super Contributor
timestamp: June 01, 2024, 11:12:59 am
content: You never know how good your backup are until things go wrong.I remember RAYNET in the UK had some issues a few years back and when they tried to bring things online they broke, I suspect because the systems were patches on top of patches and running it on a new system just made it fall over. They have then taken the opportunity to rebuild the systems on a new base.ARRL and LoTW might need a bit of time to put stuff back together in a way that it won't get hacked while at the same time improving the underlying hardware/software.

author: Sal Ammoniac
author_rank: Super Contributor
timestamp: June 01, 2024, 06:18:59 pm
content: Quote from: mendip_discovery on June 01, 2024, 11:12:59 amIf that's the way you handle backups, you're setting yourself up for failure.When I make a backup, I immediately restore that backup to a test system to ensure the backup is valid. Everyone with data they place any value on should be doing this.
Successfully Built a 5S LiFePO4 Battery Pack - Page 1
Forum section: electronics / general

author: ASICS
author_rank: Contributor
timestamp: May 27, 2024, 07:58:36 am
content: I’m excited to share that I’ve successfully built a 5S LiFePO4 battery pack! This was my first attempt at creating a battery pack, and I wanted to document the process and share some insights for anyone interested in doing the same.Planning and ComponentsFirst, I planned out the battery pack specifications and gathered all the necessary components. Here’s a brief overview of what I used:Battery cells: 5 LiFePO4 cells connected in seriesBattery Management System (BMS): To ensure safe operation and cell balancingNickel strips: For connecting the cellsWires and connectors: For completing the circuit and connecting to the load/chargerHeat shrink tubing and insulation materials: For safety and protectionAssembly ProcessCell Preparation: I started by preparing the battery cells, ensuring they were all at the same voltage level for uniformity.Series Connection: I connected the cells in series using nickel strips and spot welded them to ensure a strong connection.BMS Connection: I connected the BMS to the battery pack, ensuring each cell was connected to the corresponding point on the BMS for monitoring and protection.Final Connections: Added the main positive and negative wires, making sure to use proper connectors for secure and reliable connections.Insulation and Protection: Used heat shrink tubing and additional insulation materials to protect the cells and connections from any potential short circuits or physical damage.Testing and ResultsAfter assembling the battery pack, I conducted several tests:Voltage Check: Verified the overall voltage of the pack and individual cell voltages to ensure proper series connection.Load Test: Connected the pack to a load and monitored the performance, checking for any signs of imbalance or overheating.Charging Test: Charged the pack with a compatible charger, ensuring the BMS was functioning correctly and balancing the cells.Insights and TipsSafety First: Always prioritize safety. Wear protective gear and ensure you’re working in a safe environment.BMS Importance: A good BMS is crucial for the longevity and safety of the battery pack.Cell Uniformity: Start with cells that are as closely matched in capacity and voltage as possible.Overall, the process was a learning experience, and I’m quite pleased with the results.Hope this helps anyone interested in battery pack building!

author: armandine2
author_rank: Frequent Contributor
timestamp: May 27, 2024, 11:37:26 am
content: congrats on your success - don't forget to mention in detail:BOMtest gearspot welderetctesting and photos

author: tunk
author_rank: Super Contributor
timestamp: May 27, 2024, 12:18:01 pm
content: Many BMSs don't do balancing, and if your does, youmay want to test if it can handle large unbalances.
Escaping left and right brackets in forum posts - Page 1
Forum section: electronics / general

author: ledtester
author_rank: Super Contributor
timestamp: May 23, 2024, 02:24:42 pm
content: Just sharing a method I learned to "escape" left and right square brackets in BBcode (the markup language used here on the forum) - that is, to insert BBcode tags into your post without having them interpreted as tags.Most of the time you can use thetag, e.g.:QuoteBut what if you want to show how to use thetag? Using:Quotedoesn't work because code blocks do not nest - the first end code tag will terminate the outer code block.Or what if you want the tags to appear inline, e.g.QuoteThe trick is to use a style tag to break-up the tag you want to insert literally, e.g. to insertuse:Code:[color=black][TAG[color=black]]Besides thetag other style tags will also work for this purpose, e.g.,,,,,,. Of course, whatever style tag you use will affect the enclosed text.

author: magic
author_rank: Super Contributor
timestamp: May 23, 2024, 03:44:55 pm
content: Interesting question.Not sure if there is any "official" solution, but I came up with a simpler version of your hack:Code:[code]

author: tooki
author_rank: Super Contributor
timestamp: May 24, 2024, 10:37:25 am
content: Quote from: magic on May 23, 2024, 03:44:55 pmYep. I also use this exact trick to break up unwanted smileys, like 8) (which otherwise becomes— this has to be the most poorly thought-out smiley shortcut ever conceived).

author: Brumby
author_rank: Unknown
timestamp: May 24, 2024, 10:45:23 am
content: Yeah, I've used this trick for years, usually with the colour - but you don't have to do it to the trailing bracket[color=black][TAG] =

author: tom66
author_rank: Super Contributor
timestamp: May 24, 2024, 11:48:39 am
content: You can also use similar characters, though they won't copy-and-paste correctly.For instance, this is an example using с (Cyrillic 'Es'), which is not c (Latin 'c').TestingThis has security implications for creating similar-appearing text that has different binary signatures, think web URLs. Imagine: paypal.com vs рayрal.com. These are different, but only in Unicode land. Thankfully, there are steps taken to reduce the chance of this being a practical attack in the real world.
How to RSS - Page 1
Forum section: electronics / general

author: ScottBLAM
author_rank: Contributor
timestamp: March 21, 2019, 12:20:34 am
content: https://www.simplemachines.org/community/index.php?topic=25009.0(Oldiesmann)QuoteRecommended Ticker:http://www.battware.co.uk/desktopticker.htm

author: ataradov
author_rank: Super Contributor
timestamp: March 21, 2019, 01:34:50 am
content: Yep. I use TT-RSS and if some place does not have RSS, I'm pretty much guaranteed to not visit regularly or at all. Thankfully old fashioned forums still have RSS.

author: ScottBLAM
author_rank: Contributor
timestamp: March 21, 2019, 01:18:17 pm
content: I found your 2014 post on RSS while looking for RSS features but didn't want to necro it. The code line you showed helped me find the full guide, thanks.

author: fzabkar
author_rank: Super Contributor
timestamp: May 24, 2024, 12:22:45 am
content: EEVblog RSS feedshttps://www.eevblog.com/forum/.xml/?type=rss;sa=recent;limit=100;board=25(Repair forum)https://www.eevblog.com/forum/.xml/?type=rss;board=n(feeds for forum #n)Table of feed topics referenced against board #1 Blog2 Beginners3 -4 General Technical Chat5 Help6 Projects, Designs, and Technical Stuff7 Buy/Sell/Wanted8 The AmpHour Radio Show9 Other Equipment & Products10 Contests & Events11 Microcontrollers12 -13 Manufacturing & Assembly14 PCB/EDA/CAD15 Altium Designer16 Eagle17 -18 DIPtrace19 KiCad20 Open Source Hardware21 Test Equipment22 Crowd Funded Projects23 Supporters Lounge24 -25 Repair26 -27 Jobs28 Work Wanted29 Other Blogs30 RF, Microwave, Ham Radio31 -32 Thermal Imaging33 Metrology34 Power/Renewable Energy/EV's35 Circuit Studio36 Proteus37 -38 Vintage Computing39 Dodgy Technology40 - 4445 Embedded Computing46 - 5051 Networking & Wireless52 - 6263 Security64 - 6869 Programming70 - 7475 Computers76 - 100

author: ataradov
author_rank: Super Contributor
timestamp: May 24, 2024, 12:25:37 am
content: I usehttps://www.eevblog.com/forum/.xml/?type=rss;limit=50for all posts, including replies andhttps://www.eevblog.com/forum/.xml?type=rss;sa=news;limit=20for just the new posts across the forum.The later is specifically useful, since it lets me see all the new posts quickly.

author: fzabkar
author_rank: Super Contributor
timestamp: May 24, 2024, 12:33:28 am
content: Just a short time ago, the administrator added an RSS icon next to each forum in the main index.
darlington transistor in ltspice - Page 1
Forum section: electronics / general

author: vivi-d
author_rank: Regular Contributor
timestamp: May 22, 2024, 02:48:26 pm
content: I'm following this tutorial on digikey:https://forum.digikey.com/t/how-to-test-transistor-characteristics-in-ltspice/3015Everything seems to be working, but when I insert another transistor to make it a darlington, nothing changes on the DC sweep analysis...What gives?

author: soldar
author_rank: Super Contributor
timestamp: May 22, 2024, 03:54:55 pm
content: Try a voltage source instead of a current source?

author: Fgrir
author_rank: Regular Contributor
timestamp: May 22, 2024, 06:50:23 pm
content: Q1 emitter/Q2 base shouldn't be connected to ground

author: vivi-d
author_rank: Regular Contributor
timestamp: May 22, 2024, 07:09:31 pm
content: Thanks!

author: soldar
author_rank: Super Contributor
timestamp: May 22, 2024, 10:59:04 pm
content: Quote from: Fgrir on May 22, 2024, 06:50:23 pmHow could I miss that?!
Australian Space exploration & historical Rocket Testing - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: May 18, 2024, 02:55:11 pm
content: orhttps://www.bitchute.com/video/acdoKSM187k4/.about the videoimage at the start of video is of the operator of the Jindivik radio-controlled target drone. /\solid propellant Skylark sounding rocket launch at Woomera & its telemetry data collection then the process of electronic data transcription so it could be sent back to Britain in 1957. the sounding rocket nose cone telemetry transmitter unit with its subminiature vacuum tubes came from Britain by de Havilland Comet aircraft .subminiature vacuum tube military electronics was classified as top secret by Britain at a time before transistors.the fuelling a Black Knight research ballistic missile with hydrogen peroxide & kerosene at the Woomera launch site.preflight tasks performed by ground crew on a an Australian GAF Government Aircraft Factories Jindivik radio-controlled target drone 1957.Blue Streak ballistic missile launch and its ground control room electronic equipment with operators.life on the Australian Woomera Rocket Range in 1957 South Australia.1966 the fuelling of the liquid oxygen & launch of a Blue Streak rocket for The European Launcher Development Organisation ELDO1957 electronic equipment construction & testing at the Salisbury North military weapons research Establishment in South Australia.image at the bottom \/ is the operator of electronic telemetry data transcription equipment.sound is out of sync in one part of the video also some of the AI video upscaling failed to work properly.the video posted was a test of a free AI video enhancer app on old historical video that was downloaded . the free AI app limit was 3 min so 3 historical videos were cut down to 3min then given the AI resolution boost then put back to black. before re-posting it. this its my first use of AI in trying to add more resolution to video of old 1950s 16mm film.
Inventor of DRAM passed away - Page 1
Forum section: electronics / general

author: tooki
author_rank: Super Contributor
timestamp: May 17, 2024, 05:27:02 pm
content: https://www.nytimes.com/2024/05/16/technology/robert-dennard-dead.html?unlocked_article_code=1.sk0.fK01.z6-AUOpp8RJw&smid=url-share(Should be free to read as one of my allotment of “gift” shares.)

author: aeberbach
author_rank: Regular Contributor
timestamp: May 17, 2024, 08:23:40 pm
content: Images of pages from his engineering notebook are part of the "Welcome to IBM" course for new starters as an example of why you should keep one.