hybridfree/eevblog-posts huggingface dataset:
What is this wire sleeve called - Page 1
Forum section: electronics / general

author: Ground_Loop
author_rank: Frequent Contributor
timestamp: October 06, 2021, 12:49:56 pm
content: I'm working on an old Philco radio and need to replace several caps. I will need wire sleeves as shown below, but don't know the official name to search on. I keep getting results for braided sleeve or heat shrink. What is the proper name for this stuff?

author: tszaboo
author_rank: Super Contributor
timestamp: October 06, 2021, 12:55:31 pm
content: Some call it "Insulation tube"

author: Ground_Loop
author_rank: Frequent Contributor
timestamp: October 06, 2021, 02:10:43 pm
content: Found it. Searched for silicone fiberglass sleeve.

author: AlbertL
author_rank: Regular Contributor
timestamp: October 06, 2021, 09:10:55 pm
content: Back when that radio was built, the industry slang term for the tubing was "spaghetti".

author: TimFox
author_rank: Super Contributor
timestamp: October 06, 2021, 10:11:57 pm
content: At the time of spaghetti tubing, it was often varnished cambric woven fabric.

author: David Hess
author_rank: Super Contributor
timestamp: October 07, 2021, 03:21:03 am
content: I have always known it as spaghetti but Mouser considers it to be tubing.

author: AlbertL
author_rank: Regular Contributor
timestamp: October 07, 2021, 10:27:17 pm
content: Yes, it's important to put spaghetti on the leads of the condenser that's filtering out the 60 CPS ripple!
Short chinese translation help needed - Page 1
Forum section: electronics / general

author: martonmiklos
author_rank: Contributor
timestamp: October 03, 2021, 07:22:29 pm
content: Hello folks,Would someone who is fluent in chinese be so kind to translate the pinout from the attached picture.The resolution is so bad that I have not managed to OCR it with any online service

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: October 03, 2021, 07:32:08 pm
content: Dude, just press the button on your phone, press "translate" and point the camera at the thing.

author: langwadt
author_rank: Super Contributor
timestamp: October 03, 2021, 07:51:18 pm
content: this helps?:

author: eti
author_rank: Super Contributor
timestamp: October 03, 2021, 11:47:34 pm
content: Quote from: Alex Eisenhut on October 03, 2021, 07:32:08 pmThey may not have a smartphone, not all do.Here you go old bean, hope this helps.

author: martonmiklos
author_rank: Contributor
timestamp: October 07, 2021, 08:28:37 pm
content: Many thanks, I am using Sailfish OS which does not have such a capability.Anyway it is amazing to see that the built Android/ios OCR+translation works better than the online services.Just for future reference it is the pinout of a toy car controller called Weelye RX16 6V1: NC2: forward switch (active low, pulled up to the 3V MCU power internally)3: reverse switch (active low, pulled up to the 3V MCU power internally)4: GND5: Manual/remote controlled operation6: 6V for the MCU LDO7: 6V for the relaysTo feed the wisdom of the internet further (in the case if you coming to this page with repair intentions):If some of the relays seems to be activated unintentionally during power up and turning on and off over time randomly:Check the voltage on the forward/reverse switches.In my case the internal pull up got dead in the MCU (which marking is sanded off...) or something inside started to pulling the line low with some sub KOhm pull.Adding a 330 Ohm external pullup seems to be solving the problem.
Australia is Stalking Their Citizens - Page 1
Forum section: electronics / general

author: Trader
author_rank: Frequent Contributor
timestamp: October 06, 2021, 02:49:34 pm
content: Unbelievable how this government removed so fast the people's freedom. The people are just pets that must be vaccinated, controlled, and caged.

author: Trader
author_rank: Frequent Contributor
timestamp: October 06, 2021, 02:52:07 pm
content: Oh, my bad, I forgot... Australia is just a big Penal Colony... now makes sense.

author: magic
author_rank: Super Contributor
timestamp: October 06, 2021, 06:54:11 pm
content: CBA to even unlock the video and see the title and thumbnail, but before the thread gets locked: look in the mirror, Yanks

author: rsjsouza
author_rank: Super Contributor
timestamp: October 06, 2021, 08:02:05 pm
content: Yeah, before the thread is locked: this crap is coming here too.

author: PartialDischarge
author_rank: Super Contributor
timestamp: October 06, 2021, 08:10:25 pm
content: Quote from: rsjsouza on October 06, 2021, 08:02:05 pmThe US is the *only* country in the world were citizens can defend themselves if things turn to the extreme tyrannical. In the rest of the countries all you can do is protest with a sign and maybe a stick and some rocks

author: Gyro
author_rank: Super Contributor
timestamp: October 06, 2021, 08:21:39 pm
content: Quote from: MasterTech on October 06, 2021, 08:10:25 pmI don't see this ending well.

author: magic
author_rank: Super Contributor
timestamp: October 06, 2021, 09:02:50 pm
content: Quote from: Gyro on October 06, 2021, 08:21:39 pmThey call it "suicide by cops". Many such casesQuote from: MasterTech on October 06, 2021, 08:10:25 pmIt's quite the other way around, because what it actually takes is balls and organization, rather than posting pictures of your guns to r/TheDonald and a piece of paper you call "constitution", which the government and any random interest groups can outsource violating to private corporations and libertarians will cheer because that's how capitalism works.

author: Halcyon
author_rank: Unknown
timestamp: October 07, 2021, 07:09:13 am
content: Take that all with a grain of salt, especially from mainstream media.Most people are still free to go about their business if it's necessary. Yes, we've had some restrictions, but it's also why our infection and death rate have been so low (along with high vaccination rates).Things are now starting the open up, people can travel etc.... The technology they are talking about is just one option for people to "report in", when they are subject to home quarantine. I think the alternatives of forced hotel quarantine or police coming checking up on you aren't as ideal. It always makes me laugh when people who post their entire lives, photos, movements and private information on social media have a sook and a whinge about giving limited information to the government for a specific purpose.I think we got off pretty lightly actually. If you've actually ever been to Australia, you'll know it's among one of the more free and least restrictive countries in the world, not to mention safe.
Motion amplification,Reveal Invisible Motion. - Page 1
Forum section: electronics / general

author: PlainName
author_rank: Super Contributor
timestamp: October 06, 2021, 10:28:15 pm
content: This sort of thing is reasonably simple in principle, but amazing that someone thought to do it.No doubt someone else will soon take the idea and make it a Play download for our phones, which is also kind of amazing.
How to connect 24v DC? - Page 1
Forum section: electronics / general

author: ROSELJR
author_rank: Newbie
timestamp: October 06, 2021, 09:29:53 am
content: DC-DC converter circuit input 220v conversion output 24v alternating current how to connect 24v direct current from it？This is the introduction of DC-DC Converter:https://www.utmel.com/blog/categories/equipment/introduction-to-buck-boost-and-buck-boost-convertersThanks in advance.

author: voltsandjolts
author_rank: Unknown
timestamp: October 06, 2021, 09:33:55 am
content: Thanks for the spam, UTMEL.
Futurlec - Page 1
Forum section: electronics / general

author: tfrobase@gmail.com
author_rank: Newbie
timestamp: July 02, 2021, 01:58:27 pm
content: Has anybody ordered from Futurlec lately, I entered an order 2 weeks ago and have heard nothing?

author: thm_w
author_rank: Super Contributor
timestamp: July 02, 2021, 08:39:58 pm
content: I haven't ordered in years but from what I remember if a part is not in stock it will hold up your order and they won't tell you.You can email them to ask which part it is.

author: janoc
author_rank: Super Contributor
timestamp: July 02, 2021, 10:43:51 pm
content: Uh Futurlec is notorious for their "service". It has always been like that - search this forum, I am sure you will find threads from the past full of horror stories.Go elsewhere, even AliExpress and eBay are less trouble than Futurlec.

author: SiliconWizard
author_rank: Super Contributor
timestamp: July 02, 2021, 11:33:57 pm
content: I haven't used them in years. Well over 10. Back when I did, I used their PCB service a couple times. That was pretty cheap, and reasonable quality (at the time - these days you have better for similarly low prices), but took ages.

author: rfclown
author_rank: Frequent Contributor
timestamp: July 13, 2021, 03:22:24 am
content: I ordered from them a few months ago. I hadn't used them in many years (had no problems in the past). I too never heard anything. When I emailed, I was told the credit card didn't go through. I haven't bothered following up with the order.

author: DeanA
author_rank: Regular Contributor
timestamp: July 13, 2021, 03:41:08 am
content: Futurelec are in Bangkok if I remember correctly and the covid situation there is starting to look quite dire.

author: grantb5
author_rank: Regular Contributor
timestamp: October 05, 2021, 02:52:08 pm
content: Yes I would say dire. From the outside they seem pretty un-functional. See my experience with them recently here:https://www.eevblog.com/forum/chat/what-electronics-grabbagassortment-sites-do-you-use/msg3730150/#msg3730150

author: ledtester
author_rank: Super Contributor
timestamp: October 05, 2021, 03:15:26 pm
content: They don't always notify you when they ship. I placed an order with them two years ago. After 17 days I emailed them and they said the order had been shipped 10 days ago and gave me a tracking number. So I'd just email them and inquire about the order.
Insulation Material for Homemade HV Transformer - Page 1
Forum section: electronics / general

author: ice595
author_rank: Regular Contributor
timestamp: October 04, 2021, 01:46:03 am
content: So long story short, I found my long lost homemade HV transformer that I made 9 years ago and decided to have some fun with it once again.I still remember skipping class in high school just to come home early and wind this sucker.The secondary must have been at least 1000+ turns, to be fair I lost count after the first couple hundred turns.Standard printer paper was used as insulation for each layer of winding and the whole thing was submerged in cooking oil.It was a lot of fun drawing 4 inch arcs when driven with a ZVS driver circuit with 46V input. Then I cranked up the input to 56V, I was able to draw 5 inch THICK arcs and the secondary shorted out shortly after.Well I suppose it was fun while it lasted. Video of me drawing arcs here:Now im itching to wind another one but with better insulation this time around.What commonly available insulation material is suitable for HV transformers?Is Kapton tape better than standard 0.1mm thick printer paper?

author: james_s
author_rank: Super Contributor
timestamp: October 04, 2021, 01:51:39 am
content: IIRC the most common material used for transformer layers is polyester. HV transformers are hard though, especially HV high frequency transformers, it's very difficult to prevent arcs and virtually all commercially made HV high frequency transformers are vacuum impregnated in epoxy. Typically they also are made on a sectioned bobbin so that it is effectively multiple smaller windings end to end in series. While messy, for a home made thing it's hard to beat mineral oil.

author: ice595
author_rank: Regular Contributor
timestamp: October 04, 2021, 02:15:39 am
content: Quote from: james_s on October 04, 2021, 01:51:39 amGood idea, I can 3D print a bobbin this time around. Might be difficult to add insulation layer in between windings though.I do have a fridge compressor that can act as a vacuum pump to suck out any air then pressurize it fill any voids left behind.

author: james_s
author_rank: Super Contributor
timestamp: October 04, 2021, 03:12:11 am
content: You don't need much of a vacuum, even one of those hand pumped ones for testing automotive vacuum actuators will work. Fridge compressor will work fine too.
Transformer testing - Page 1
Forum section: electronics / general

author: spike47
author_rank: Contributor
timestamp: October 03, 2021, 12:03:01 pm
content: HiI am rewiring a 240v 50Hz Transformers (Laminated Core) primary winding, question will it do any harm if I power it up without the laminates in place .cheersSpike

author: T3sl4co1l
author_rank: Super Contributor
timestamp: October 03, 2021, 12:38:27 pm
content: Yes.Tim

author: Circlotron
author_rank: Super Contributor
timestamp: October 03, 2021, 01:07:13 pm
content: Without the core in place, the inductance of the primary winding will be very low and if you apply full mains voltage the current will go off the planet and burn out the winding very quickly. Use another transformer and apply say 10VAC to the winding for a short time and measure the current with and without the core.

author: spike47
author_rank: Contributor
timestamp: October 03, 2021, 02:24:14 pm
content: Thanks guys , yeh I thought hat might be the case.cheersSpike

author: spike47
author_rank: Contributor
timestamp: October 03, 2021, 02:24:51 pm
content: that !
The early history of the CAN bus standard? - Page 1
Forum section: electronics / general

author: e100
author_rank: Frequent Contributor
timestamp: October 03, 2021, 03:45:09 am
content: A few days ago I asked this question over in the projects and tech but nobody responded."Whilst pondering the timing and cable length limitations associated with the in-frame ACK system, I tried searching for the history of the CAN bus standard and the web just kind of says it was invented as a brand new thing in 1986. Is that the whole story or did it evolve from something else, and was the use of an in-frame ACK system a completely novel idea at the time?"Does anyone know of any resources that may shed light on its development?
Chopper mystery  - Page 1
Forum section: electronics / general

author: eti
author_rank: Super Contributor
timestamp: October 03, 2021, 02:06:22 am
content: A mystery if ever there was one. I live in a little picture postcard village in England, somewhere in... England! 😉 Next door to me is an Old Rectory, the various owners of which I’ve known for nigh on forty years (it’s a small mansion)The Thurs and Fri before last (23rd & 24th Sep 2021) a chopper landed in their garden (the field right next to mine, no more than 40m away), lingered around for 5-10m then shot upwards and headed directly to land in the grounds of a Royal Estate in Windsor (Thursday), and the same occurred the next day (Friday) only it went to Ascot this time.As you’ll imagine, I’m not willing to say any more than this. What I would like to know is this - apart from the flight radar tracking I already have for these events, is there a discreet and non-intrusive and LEGAL way I’m able to tell what this chopper was doing and for whom? I appreciate it may be highly confidential, moreso what with it heading to and from Royal properties.The new owner of the aforementioned Old Rectory met me yesterday, looking for a mislaid Amazon parcel, and I joked with her about what fun it had been to have a chopper hovering around next door. She mentioned something obscure about “I’m so sorry, I hope it didn’t make too much noise” and something about someone having just passed their chopper test etc. I didn’t and wouldn’t probe or pry, especially with a new neighbour on the same day I’d ever met her the first time - highly inappropriate.Just wondering if there’s some form of public data I can access to see why it was there? It was great fun to see this HUGE Bellranger hovering above my garden - it’s far from a daily thing.Thanks.

author: xrunner
author_rank: Super Contributor
timestamp: October 03, 2021, 02:14:26 am
content: Perhaps you could reach out to the local authorities .. oh damn wrong thread.

author: eti
author_rank: Super Contributor
timestamp: October 03, 2021, 02:18:24 am
content: Quote from: xrunner on October 03, 2021, 02:14:26 amThe cops round here wouldn’t be up to the task. Besides, they’d likely tell the local rag and drag the tone right down. I have more respect for my community than that.

author: WattsThat
author_rank: Frequent Contributor
timestamp: October 03, 2021, 02:25:43 am
content: Oh, a helicopter. Thought you were talking about a chopper amplifierIn the US, non-military aircraft registration information is public domain so if you can correlate the FlightAware or whatever radar data you have to a specific aircraft, the owner of record usually turns up more info with minimal effort. Your mileage may vary.

author: eti
author_rank: Super Contributor
timestamp: October 03, 2021, 02:27:36 am
content: Quote from: WattsThat on October 03, 2021, 02:25:43 amJolly good. Many thanks.
coppercone2: OK: Here for you, is MECHANICAL 3-D NETWORK addressing scheme... - Page 1
Forum section: electronics / general

author: RJSV
author_rank: Super Contributor
timestamp: September 29, 2021, 08:12:19 pm
content: You gets theEach u.one doin.r digiTheBuge, in the binary tree path, is obtained via the explicit positioning action (in current switch).This waase a 5-way switch, connecting to 5each.Those, remember, are the 'NODES' inh network...

author: coppercone2
author_rank: Super Contributor
timestamp: October 01, 2021, 02:37:35 pm
content: Hi, I almost missed this, I think it should be integrated to the main thread.

author: RJSV
author_rank: Super Contributor
timestamp: October 03, 2021, 01:11:37 am
content: Yhow...I'll lookSo, mys and lSo in total, you end uIn concept, although not fully accurate, a view of operation, for proper tensioning all those coBasic operation is toThen, switch is placed intoction, for anys scheme...
Recycling electronic with specific purpose - Page 1
Forum section: electronics / general

author: Raj
author_rank: Frequent Contributor
timestamp: October 01, 2021, 06:44:55 pm
content: I was wondering, if I teardown a broken CAT S61 phone to get it's thermal camera, will it work with lepton dev board?(If this is true, by posting this, I'm shooting my own foot since all of them will be sold of immediately to other forum readers, if it's true)Is there any other phone or electronic that you can teardown for very specific part, that otherwise world cost a whole lot more.I do know, buying a Seagate external drive can give you an internal drive plus adapter board for a lot cheaper (same with other external drives, minutes the price difference)

author: Raj
author_rank: Frequent Contributor
timestamp: October 01, 2021, 07:34:27 pm
content: Correction: apparently, S60 has lepton sensor. S61 has some other sensor

author: thm_w
author_rank: Super Contributor
timestamp: October 01, 2021, 08:45:15 pm
content: Looks like the module is on page 26?https://fccid.io/ZL5S61/Internal-Photos/Internal-Photos-3823730It is still a FLIR sensor though.https://reductionrevolution.com.au/blogs/review/cat-s60-s61-s62-phone

author: Raj
author_rank: Frequent Contributor
timestamp: October 02, 2021, 06:23:50 am
content: Lol...either Ebay is censoring the results (more likely), hard. or all of the s60 are sold out. I'm out of luck.I guess it's VPN time. Damn EBAY.
Boon Bang Fai Talai Lan Pinwheel Rocket - Page 1
Forum section: electronics / general

author: MT
author_rank: Super Contributor
timestamp: October 04, 2021, 01:29:27 am
content: Apparently they are made out of bamboo and black powder and is a 1500+ year old tradition, a rocket to goods of the sky asking for rain or something.The relly big one's also have huffing and puffig sound like steam train.https://youtu.be/XDpl2JD9km4?t=1730Sometimes it do as it wants tohttps://youtu.be/XDpl2JD9km4?t=2631And also they have a bamboo missile festival.Big enough to easily take down a jet liner.
Some Apple products succumb to new 'Y2K'-like symptoms!!?? - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: September 29, 2021, 10:48:04 am
content: The Missus' informed me that on the News on TV, they were talking about a lot of older iPads & iPhones Apps will stop working after tomorrow??(I missed it, so I'm not sure what the stated technicalities are)... So on the Net, I found this News statement. One of many, various dates...https://www.today.com/news/some-iphones-will-stop-working-correctly-tomorrow-here-s-what-t166324Most older iPhones & iPads can NOT have their O.S. updated beyond a certain level. It seems that such older limited O.S. versions aren't equipped to handle"GPS time rollover issue that resets the device's clock back to 000000000. This then prevents the device from using any apps that require the correct date and time."Hmmm... Time will tell, what still remains working!!

author: jc101
author_rank: Frequent Contributor
timestamp: September 29, 2021, 05:30:40 pm
content: Isn't this a bit late, there was something back in 2019 about a GPS rollover fix. Not heard of anything since then...

author: Neper
author_rank: Frequent Contributor
timestamp: September 30, 2021, 10:39:57 am
content: The linked message on today.com dates from 2019.

author: Jeroen3
author_rank: Super Contributor
timestamp: September 30, 2021, 10:45:17 am
content: It's tradition the alarm clock doesn't work after DST switch or software update. So I'm not surprised.Just wait for Y2k38.

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: September 30, 2021, 11:36:10 pm
content: Quote from: Jeroen3 on September 30, 2021, 10:45:17 amStrange that iOS would have this problem. The Samsung and Sony phones I've had (both Android and pre-Android) always worked fine, despite their home countries not having daylight saving. It's an important feature that you would expect to be well-tested ...

author: Brumby
author_rank: Unknown
timestamp: October 01, 2021, 01:36:07 am
content: Nothing to do with date issues as such ... everything to do with Digital Certificates and their expiry:One day until millions of iPhones, Macs stop workingTitle of this is a bit misleading. It'snotjust Apple products that are susceptible.

author: GlennSprigg
author_rank: Super Contributor
timestamp: October 01, 2021, 07:34:25 am
content: Quote from: Brumby on October 01, 2021, 01:36:07 amThanks for clearing that up, Brumby. That makes more sense now!!Will check our old iPad Mini to see what has changed...EDIT... It seems in the link you gave above, they stated that...“For an Android phone’s built-in browser, the list of trusted root certificates comes from the operating system — which is out of date on these older phones,”“However, Firefox is currently unique among browsers — it ships with its own list of trusted root certificates.”, so I guess you wil be able to use Firefox instead.
Interesting story of the MOSFET - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: September 30, 2021, 03:56:38 pm
content: Curious Droid on the history of MOSFEThttps://youtu.be/bHwl8TdEI6k

author: David Hess
author_rank: Super Contributor
timestamp: October 01, 2021, 03:52:48 am
content: Unfortunately he did not go into the type of technical detail I would want to see.
Resistor color not correct - Page 1
Forum section: electronics / general

author: Jan Audio
author_rank: Frequent Contributor
timestamp: September 27, 2021, 03:31:20 pm
content: Hi, when i started this hobby i ordered 100 piece 820 ohm resistors.They dont have a brown line, instead they have a black line ( 82 ohm )Have you ever had wrong labeling before ?bye

author: Nusa
author_rank: Super Contributor
timestamp: September 27, 2021, 03:35:10 pm
content: Or you got the wrong product and the label is correct.

author: Jan Audio
author_rank: Frequent Contributor
timestamp: September 27, 2021, 04:22:50 pm
content: No i mean the paint color on the resistor itself.The bag says the right 820 ohm, the paint is black not brown.

author: harerod
author_rank: Frequent Contributor
timestamp: September 27, 2021, 04:34:04 pm
content: Manufacturer order code? How many rings? Picture of the suspect? What is the actually measured resistance?Ah, and try to move this question to the Beginner section, please.

author: Cubdriver
author_rank: Unknown
timestamp: September 27, 2021, 06:43:29 pm
content: I'll second the 'have you actually measured them' question, and my second question would be where were they ordered from - a mainstream supplier, or somewhere like ebay or Amazon, which I'd consider to be considerably sketchier as component sources?-Pat

author: Benta
author_rank: Super Contributor
timestamp: September 27, 2021, 07:09:51 pm
content: Most leaded resistors today have three-ring colour codes for the digits, regardless of whether they're E12, E24; E48 or E96 series.An 820-ohm resistor would then be gray-red-black-black plus the tolerance ring.

author: ejeffrey
author_rank: Super Contributor
timestamp: September 29, 2021, 03:33:26 pm
content: Please never do that again. We don't need a 1 minute out of focus, badly exposed and glare filled video. Post a *photo* with decent resolution.Anyway, yeah that looks wrong. I would expect to see either grey/red/brown + gold or grey/red/black/black + gold. It looks to me like someone decided that if the multiplier is 10^0 they could just leave the band off.Where did you get these?

author: Jan Audio
author_rank: Frequent Contributor
timestamp: September 29, 2021, 04:01:03 pm
content: In a german shop a very long time ago, the bag says : made in taiwan roc.
Keysight's $1,110.00 USD off the shelf computer fan - Page 1
Forum section: electronics / general

author: nexus
author_rank: Regular Contributor
timestamp: September 29, 2021, 04:45:03 am
content: If you don't believe me, look at the Keysight parts website yourself:https://www.keysight.com/my/partDetail/E4406-60159I know Keysight has a rep for being pricey like any premium brand would. But things seem to be getting out of hand...

author: Berni
author_rank: Super Contributor
timestamp: September 29, 2021, 05:17:57 am
content: Well some of the older units have massive cast metal fans with AC motors that i am absolutely terrified of poking my fingers around when running. Im pretty sure those things could chop up a carrot.Even such a built like a tank fan would be a bit steep for 1 grand.Perhaps its just that its a obsolete fan and they want to keep them in stock for a reasonable amount of time for the customers that want the original fan in there. Since lets face it, if you are concerned about how much the repair costs and the only thing wrong with the unit is a fan, then you are going to pop the lid and stuff a new fan in there yourself.

author: Kerlin
author_rank: Regular Contributor
timestamp: September 29, 2021, 06:21:15 am
content: Must be a typo, but it does happen.Old man's story but............In about 2004 I fixed a power supply for a 486 computer for an avionics company. They were prepared to pay a massive amount.They said it didn't matter because the computer was part of their system and due to their strict procedures and it was too difficult to replace.They even had the serial number of the power supply documented, so they were stuck.In that job if the original fan was unobtainable, I would have bought one at such a price and they would have paid for it.
World's Largest Heathkit Collection - Page 1
Forum section: electronics / general

author: Gary350z
author_rank: Regular Contributor
timestamp: September 28, 2021, 04:12:52 am
content: I just found this YouTube video about a large Heathkit collection, with more than 1900 Heathkits, including unbuilt Heathkits, Tektronix equipment, and much more. The number of Heathkits is just crazy.A Visit to the World's Largest Heathkit Collection
Some of the best software to find the similar component - Page 1
Forum section: electronics / general

author: abdulbadii
author_rank: Frequent Contributor
timestamp: September 28, 2021, 10:05:04 am
content: What are some of the best way or software to find similar or alternative to a particular electronic component?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: September 28, 2021, 02:14:30 pm
content: https://www.trustedparts.com/en
What glue was used in vacuum flourescent displays? - Page 1
Forum section: electronics / general

author: Refrigerator
author_rank: Super Contributor
timestamp: September 25, 2021, 12:25:12 pm
content: It surprised me when i saw that a VFD is just glued together.I have three salvaged VFDs, one made in Japan, one in USSR and another one of unknown origin, yet they all share one thing in common - they are all glued together with a grey glue.VFDs need a high vacuum to operate and normally when you think of high vacuum stuff like expensive dumet wires, hydrogen leak detectors and glasswork with a gas torch come to mind.Yet the VFDs i have are stuck together like an aquarium and seem to hold vacuum just fine as evidenced by the getter showing good health in all three.And for the longest time i've wanted to play with some high vacuum stuff but couldn't because i didn't have the tools to work with glass and dumet wires were hard to get.But if i could just glue some pieces together then it would be so much easier.But the question remains, what glue did they use to stick these VFDs together? Does anyone have a clue?

author: retiredfeline
author_rank: Frequent Contributor
timestamp: September 25, 2021, 12:42:51 pm
content: You're sure the glue is not just filler and there is a vacuum sealed unit behind? Game to take it apart?

author: Gyro
author_rank: Super Contributor
timestamp: September 25, 2021, 02:55:10 pm
content: It is almost certainly glass 'frit' seal, as used in ceramic ICs...https://en.wikipedia.org/wiki/Glass_frit_bonding
Are there any graphs of component supply in market vs package type - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: September 25, 2021, 02:55:37 am
content: Has anyone seen any graph or data showing component supply/availability in market vs the parts package type?Over the past 10 years I've been noticing a reduction in availability of things like SOT23 and an increase in smaller package like DFN.This all seems normal, as phones and other electronics push the demand for smaller packages and old packages get retired.But it's easy to forget other packages exist and keep using what you are used to using without noticing other options may have appeared that are cheaper or more available.It got me wondering, if you want a transistor (or any part), what package should you select for best availability in the market. Both in terms of the number of brands offering that package and stock levels of that package vs the same part in another package.Sure, for any specific part you could search and find out, but this seems like the kind of thing you could easy graph for each component type if you had access to the Digikey database for example.Has anyone seen graphs or data on this sort of thing?

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: September 25, 2021, 03:04:48 am
content: Anecdotally, during the ongoing parts shortage, no-lead packages were generally the first to disappear and continue to be the hardest to source, and QFPs easier. On the other hand, some of the latest chips (e.g. STM32G series, with its backwards-incompatible pinouts) have been more available, probably because people haven't included them in many designs yet. For these reasons, I've redesigned several boards to 100% QFP and switching from STM32L to STM32G. In the long run of course the trend is toward miniaturisation as you say.
Has anyone for lost keys made thwier own tracking ID or lost pills - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: September 10, 2021, 01:54:15 am
content: Or is the technology so small that its out of scope of the ee... I want a sugar vube box I can set my keys or pills

author: Beamin
author_rank: Super Contributor
timestamp: September 10, 2021, 01:57:17 am
content: edit i lost my cotacts

author: Beamin
author_rank: Super Contributor
timestamp: September 24, 2021, 06:37:00 am
content: Quote from: evb149 on September 10, 2021, 03:48:40 amDo they make small devices you are talking about like the size of a car fob I could attach to important objects then hide them away. To find would be an app on the phone.I unfortunately have no ability to bui;d an app so I would have to find a commercial one. I dont even know what you would search for on google. I do remember these white squares about 1"x1"X 1/4" that you could use to track things but I have no idea what they are called or how they work. This was a few years ago when I read an article on security vulnerabilities of the device, but that doesnt bother me.

author: kripton2035
author_rank: Super Contributor
timestamp: September 24, 2021, 06:39:38 am
content: apple sells it's "airtags" made exactly for that.
Whats a good iphone app to measure cellular signal strength? - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: September 20, 2021, 09:53:34 pm
content: I saw an app in the new eletroboom youtube video where he has an app that measures cellular signal strength and even wifi. The more technical the better. I have xfinity internet where you essentially use the closest comcast router and piggy back off their modem, a feature comcast keeps hidden but advertises as "hot spots" Its unreliable at best and the signal varies alot I would like yo figure why and how it works. Some times its great some times it doesnt work at all and other times it will connect but have no internet connection. Anyone else use this? Im usig it until can get my own connection.

author: SteveyG
author_rank: Unknown
timestamp: September 21, 2021, 08:49:43 am
content: The "Signal Strength" feature in any phone is usually very basic, often just the average amplitude at the receiver. It can be easily fooled by other signals at the same or similar frequencies since it is not a precision instrument!I had a quick look at the available apps, there seems to be a whole plethora available - best thing would just be to try some out and see if they do what you need.

author: GlennSprigg
author_rank: Super Contributor
timestamp: September 21, 2021, 12:34:10 pm
content: Quote from: SteveyG on September 21, 2021, 08:49:43 amIt's true what you say about possibly being very basic, but I've always been impressed with the literal plethora of many 'sensors'within modern 'smart-phones' these days!! (Altitude/Pressure, 3D orientation, 3D accelerometers etc etc). I don't know about 'iPhones',but for Android, look at an App called 'Sensors Toolbox'. It's amazing what it can show !!

author: Beamin
author_rank: Super Contributor
timestamp: September 24, 2021, 06:30:23 am
content: Quote from: GlennSprigg on September 21, 2021, 12:34:10 pmThats a cool tool for iphone. I downloaded some signal apps and most are just ads that you have to pay 99 cents for to unlock each feature so you pay then you try it out costs like 10 bucks per app. Really tried downloading alot and no luck so far.The iphone 10max is a 4g phone I think but some apps will pick up 5g hexagon towers on a map. How can it do that? Or is it just a frequency they are looking for.

author: tooki
author_rank: Super Contributor
timestamp: September 25, 2021, 09:06:03 pm
content: Apple actually provides basic tools for free.For cellular, launch the Field Test app by “dialing” the phone number *3001#12345#*.For Wi-Fi, download Apple’s free AirPort Utility app. It contains a Wi-Fi scanner.

author: G7PSK
author_rank: Super Contributor
timestamp: September 26, 2021, 05:11:27 pm
content: I use an app called "phone signal" on my android phone seems to work well. Only gripe I have with it is it only works with one sim at a time so I have to disable each sim in turn, but it gives strength in db in real time as well time up data on the signal such as speed amount of data etc.
Dual output voltage from two single output power supplies - Page 1
Forum section: electronics / general

author: mike buba
author_rank: Contributor
timestamp: September 23, 2021, 02:52:51 pm
content: Hi all,I found aTraco Power schematics, which has the same connection diagram as mentioned inthis topic, but I still have several questions. The idea is to use two AC/DC +15Vdc power supplies to create +/-15Vdc power supply.1. My PCB has three inputs: +15Vdc, -15Vdc and GND. Where should I connect common connection from a 'new' power supply (-Vout from PS1 to +Vout from PS2)?2. In my case +15Vdc will have a higher load (+5Vdc circuits, LEMs and IGBT driver supply) and -15Vdc will have a smaller load (only IGBT driver supply) which will lead to common point being not zero. Will this affect +/-15Vdc values, i.e. will they drift or osculate?3. Should I connect a power supply common point to GND PCB input? But the PCB's GND is connected to metallic enclosure GND and in that case the voltage will be different between GND and common point (because of load unbalance). Should I disconnected enclosure from the PCB, connect GND to enclosure and use common for GND on PCB?Thank you in advance.

author: David Hess
author_rank: Super Contributor
timestamp: September 23, 2021, 03:28:51 pm
content: Quote from: mike buba on September 23, 2021, 02:52:51 pmThat is right.QuoteThere will be no effect unless one side if overloaded. Observe the shunt diodes in your example which prevent one power supply from reversing the voltage on the other when overloaded.QuoteThe unbalanced load is irrelevant. Usually it is best to use a single point ground. What this means is that the common connection for the power supplies should be the same point on the board where the chassis is connected.

author: mike buba
author_rank: Contributor
timestamp: September 23, 2021, 06:18:37 pm
content: Do I connect Com. to GND input?What about grounding the PCB or the system after the power supply as I have only live (+/-15V) and neutral wire (Com.) coming out.I have attached a simplified drawing of the system. If I connect Com. to GND, I do not have GND (earth) connection on PCB, enclosure or anywheres else on the right. I cannot assume Com. is equal to GND, only 0V?PCB expects a GND input.

author: David Hess
author_rank: Super Contributor
timestamp: September 23, 2021, 06:54:10 pm
content: The outputs from the two power supplies should be floating with respect to their AC inputs and the AC ground. So the common point for your +/-15 volt supply is connected to the common of the circuit, and that point is connected to the chassis and presumably earth ground.
2021 Bus Pirate v3 or v4? - Page 1
Forum section: electronics / general

author: nathon
author_rank: Contributor
timestamp: September 18, 2021, 09:16:58 pm
content: I'm looking to buy a Bus Pirate. I've been holding on this purchase due to the much better spec'd v4 being developed. However, we're now many years down the road and it is still documented as being experimental, without much of the support of v3.So, my question is whether folks think v4 is going to materialize anytime this decade or whether I'd be better off going ahead an purchasing 3.x. It's difficult for me to judge from the outside whether any progress is being made or whether it stalled.

author: NiHaoMike
author_rank: Super Contributor
timestamp: September 18, 2021, 10:25:31 pm
content: Just get a Raspberry Pi for I2C and SPI, add buffers to allow working with voltages other than 3.3V.

author: eti
author_rank: Super Contributor
timestamp: September 23, 2021, 07:29:19 am
content: Quote from: nathon on September 18, 2021, 09:16:58 pmI have the 3, it works fantastically.

author: eti
author_rank: Super Contributor
timestamp: September 23, 2021, 07:31:37 am
content: Quote from: NiHaoMike on September 18, 2021, 10:25:31 pmPoor advice. The bus pirate is a wonderful tool and superb at what it does. The pi is not a magic solve-all.

author: BBBbbb
author_rank: Unknown
timestamp: September 23, 2021, 09:26:19 am
content: About a year or two ago I was in the same place as you, went back and forth which one to buy, and decided in the end to get the 3.Both projects are out of DP's focus, but v3 is mature and a lot more resources online for it.I didn't need the extra HW features (pullups seemed convenient) for what I was doing at the time, and didn't want to jerk around with bugs in the tool itself.My reasoning was - if I was going to debug the BP itself, then I'm better off using one of the SBCs or arduinos I have around the house and go fully DIY (which I do for some cases)
Collection of vintage electronics education kits - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: September 12, 2021, 12:04:35 pm
content: The 'Spring' connectors like in the video at8:05were my favorite at a kid!!

author: Shock
author_rank: Super Contributor
timestamp: September 12, 2021, 03:08:20 pm
content: I always liked the concept of the first Dick Smith Funway set. It came in multikit form or just the book. The pages with schematics were "grid layout style". You cut or trace the schematics out and glue to a scrap of wood or cardboard then assemble. Aside from being easy to build, the circuits could be left assembled.

author: Miyuki
author_rank: Frequent Contributor
timestamp: September 13, 2021, 09:32:15 am
content: I like this form factorNo messy wires, everything is in neat boxesAnd finished circuit looks like a circuit diagram

author: HobGoblyn
author_rank: Unknown
timestamp: September 13, 2021, 03:42:23 pm
content: I had a 200 in 1 with springs in a wooden box rather than plastic, similar to the wooden one shown after 8:06

author: Shock
author_rank: Super Contributor
timestamp: September 14, 2021, 03:51:02 am
content: If anyone has a .pdf of the "World of Radio and Electronics" manual (or later reprints) let me know.I've read the Science Fair 200 in 1 (from the 80's) it focuses on control and logic circuits towards the end, quite a variety of projects.

author: james_s
author_rank: Super Contributor
timestamp: September 14, 2021, 04:04:19 am
content: I had one of those wood cased ones too, and later several others with the spring connectors, I loved those things.

author: Shock
author_rank: Super Contributor
timestamp: September 14, 2021, 04:41:37 am
content: Here is a good resource page on vintage kits.http://searle.x10host.com/ElectronicKits/

author: GlennSprigg
author_rank: Super Contributor
timestamp: September 14, 2021, 11:43:37 am
content: Quote from: Shock on September 14, 2021, 03:51:02 amThis probably isnotwhat you wanted... but I have a link here that may be of interest to many, anyway. That is for...Hundreds ofRadio-Electronics & Electronics Nowmagazines in full .pff, from1948to1999. Just click on a 'Tick'!!https://worldradiohistory.com/Radio_Electronics%20_Master_Page.htm

author: Shock
author_rank: Super Contributor
timestamp: September 15, 2021, 06:25:47 am
content: Yeah seen many of them before, great historical resource.Even larger collection of vintage kitshttp://www.zpag.net/Electroniques/Kit/

author: PeterJ
author_rank: Newbie
timestamp: September 20, 2021, 08:16:13 am
content: THE post above by "Shock"Even larger collection of vintage kitshttp://www.zpag.net/Electroniques/Kit/is especially good since it has a lot of the PDF manuals ...

author: Canis Dirus Leidy
author_rank: Regular Contributor
timestamp: September 21, 2021, 09:56:37 am
content: The "Volna" kit for a young radio designer looks at these bourgeois perversions with obvious disapproval:P.S.List of Soviet DIY kits, in Russian.
Bogatin's new book: Practical Guide to Prototype Breadboard and PCB Design - Page 1
Forum section: electronics / general

author: jrs45
author_rank: Regular Contributor
timestamp: September 20, 2021, 04:59:12 pm
content: https://us.artechhouse.com/Bogatins-Practical-Guide-to-Prototype-Breadboard-and-PCB-Design-P2206.aspxI haven't seen any reviews yet but this looks to be a pretty useful book, even for reasonably seasoned designers like myself. I'm a little surprised I haven't seen it promoted anywhere, including his blog. Anyone know anything more about it?I mean, his videos and such have easily justified the cost of the book to me, and he's the real deal.
HELP, what's the Name of this software?  it's for microcircuit design - Page 1
Forum section: electronics / general

author: Unica_Research
author_rank: Contributor
timestamp: September 19, 2021, 05:33:51 am
content: HELP,what's the Name of this software?it's for microcircuit design, but some companies have made a new interface for it.

author: iMo
author_rank: Super Contributor
timestamp: September 19, 2021, 05:49:01 am
content: https://www.ambitec.org/products/cae-design-software/vlsi-ams-ic-design/

author: Unica_Research
author_rank: Contributor
timestamp: September 19, 2021, 07:06:17 am
content: thanks bro,
Ferrari Challenge Infineon Raceway - Ferrari F1 Clienti Driver: Bud Moeller / Se - Page 1
Forum section: electronics / general

author: MathWizard
author_rank: Super Contributor
timestamp: September 19, 2021, 03:09:00 am
content: I love the dynamic range of the engines back then in the late 90's / 2000's iirc. Great practice video of getting used to the track, and the GLORIOUS high rev engine sounds of the v 10 or was it v12...yeah idr, but what a beautiful sound
I’ll make your palms sweat.  - Page 1
Forum section: electronics / general

author: eti
author_rank: Super Contributor
timestamp: September 17, 2021, 04:20:27 am
content: Yea, this is VERY stupid, but wow…https://youtu.be/MtFLKmb2w7A

author: Halcyon
author_rank: Unknown
timestamp: September 17, 2021, 07:54:15 am
content: Fuck that for a joke! Even just watching it makes me anxious.

author: Gyro
author_rank: Super Contributor
timestamp: September 17, 2021, 09:23:26 am
content: Pah, stair climbing thrill seekers! Fred Dibnah used to fix on his own ladders as he climbed, and assemble his own scaffolding at the top!https://www.youtube.com/results?search_query=fred+dibnah

author: eti
author_rank: Super Contributor
timestamp: September 17, 2021, 07:40:00 pm
content: Quote from: Gyro on September 17, 2021, 09:23:26 amMr Dibnah was marvellous - I watched a LOT of these programmes of his, a couple of years ago; he's inspiring, ever so.