hybridfree/eevblog-posts huggingface dataset:
What cleaning solution are you using with your ultrasonic cleaner? - Page 1
Forum section: electronics / general

author: soFPG
author_rank: Frequent Contributor
timestamp: December 14, 2019, 10:49:04 pm
content: If I am not mistaken, the container is first filled with distilled water and then some cleaning solution is added to the water.What kind of solution do you guys use? Isoprob. alcohol? What's the most effective for flux removing?

author: David Hess
author_rank: Super Contributor
timestamp: December 15, 2019, 02:40:00 am
content: For routine cleaning I add a little TSP or dish soap but that will not work for flux removal.

author: oPossum
author_rank: Super Contributor
timestamp: December 15, 2019, 03:41:33 am
content: Chlorine trifluoride. It removes everything.

author: David Hess
author_rank: Super Contributor
timestamp: December 15, 2019, 04:00:12 am
content: Quote from: oPossum on December 15, 2019, 03:41:33 amThat is spoken like someone who has read Ignition! by John Clark.

author: oPossum
author_rank: Super Contributor
timestamp: December 15, 2019, 04:26:18 am
content: Yes, an excellent book. Also a follower of Derek Lowe (In the pipeline / Things I won't work with).

author: Vgkid
author_rank: Super Contributor
timestamp: December 15, 2019, 05:13:58 am
content: Quote from: oPossum on December 15, 2019, 03:41:33 amJust did some reading on it, scary stuff.

author: Someone
author_rank: Super Contributor
timestamp: December 15, 2019, 09:28:03 am
content: Quote from: Vgkid on December 15, 2019, 05:13:58 amIf its featured in "Things I Won't Work With" then you're in for a wild ride:https://blogs.sciencemag.org/pipeline/archives/2008/02/26/sand_wont_save_you_this_timeCovers both the comments from above.

author: daqq
author_rank: Super Contributor
timestamp: January 09, 2020, 07:53:14 am
content: Just a warning, some parts are very sensitive to some cleaning substances. We had this experience, the VISHAY IHLP inductor series binder pretty much dissolves when washed in butyldiglykol and IPA.On the plus side, I got to see what such an inductor looks like on the inside. And got to replace 20 pcs of them by hand. Yaay me.

author: Gyro
author_rank: Super Contributor
timestamp: January 09, 2020, 11:59:12 am
content: Anything flamable, such as IPA is dangerous in a standard home cleaner. It gets turned into an aerosol (ie. droplets, not a vapour) which can travel significant distances across the bench and be ignited very easily.Commercial cleaners using flammable solvents normally purge oxygen from the closed compartment.
Using Caps to change phase for motors? - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: January 08, 2020, 06:46:10 pm
content: This is a video where someone is restoring a machine that runs on three phase. The video says: "380V tri to 220V mono" and he adds caps to make it work on 220. How does this work? I didnt think this was possible.https://youtu.be/iaqRwIQoMz8?t=1313

author: MagicSmoker
author_rank: Super Contributor
timestamp: January 08, 2020, 07:00:08 pm
content: It's a bit of a hack without an idler motor, but the basic idea is similar to how a permanent split capacitor motor works: one phase is wired directly to the mains, the 2nd phase has a capacitor across it that will give approximately 120 deg. of phase shift at full load and the 3rd has a capacitor that gives 240 deg. phase shift.More consistent phase shift, better voltage balance between phases and a higher starting torque in the working motor can be achieved by using an idler motor (with at least a starting capacitor, if not phase-shift capacitors wired from phase to phase) that is typically sized at 1.5x or higher the nameplate rating of the working motor; this is called a rotary phase converter.These days it will likely prove less expensive to just buy a small VFD, at least up to a motor rating around 3kW, unless you already have all of the components.EDIT - a bit more detail on the idler motor option.
Identify leica rotary encoder (DST360)? - Page 1
Forum section: electronics / general

author: onesixright
author_rank: Frequent Contributor
timestamp: January 05, 2020, 06:32:01 pm
content: Hi All,Long shot, but worth the try. Although I don't have one, this is an exploded view of a Leica DST 360. It's basically a tripod head which can track the angles (when you attach your Disto x3 or x4 to it).Maybe someone can "see in" the exploded view, what type of encoder they would have used? Was searching for some spare-parts, but no dice.Thanks!

author: daqq
author_rank: Super Contributor
timestamp: January 06, 2020, 10:22:56 am
content: Would guess magnetic? The two PCBs with the single IC on top, atop of both axis, such as this one:https://ams.com/as5270All you need is a small magnet somewhere on the rotary (or stationary) part.

author: shakalnokturn
author_rank: Super Contributor
timestamp: January 08, 2020, 11:04:07 am
content: Optical? Maybe a couple of reflective sensors on the small PCB sensing the dull green/shiny gold on the round PCB with the star shape.

author: onesixright
author_rank: Frequent Contributor
timestamp: January 08, 2020, 04:05:13 pm
content: Thanks you both!I was hoping that the symbols in the exploded view would give away some indications which parts where used. Via the datasheet I could then do some guessing how they would be used (protocol wise).The back of the X3/X4 Disto has 4 contacts. I'm guessing its VCC/GND and two other pins maybe: I2C or UART, or?I'm awaiting my X3, but the DST360 I don't have. The DST itself is pretty expensive $999. The 4 pins just raised my curiosity what's happening there 😀The DST base allows you to aim at 2 points in space and it will calculate the distance between it.

author: MT
author_rank: Super Contributor
timestamp: January 08, 2020, 04:10:39 pm
content: It looks to be optical 2 leds, sensors on PCB left corner

author: SeanB
author_rank: Super Contributor
timestamp: January 08, 2020, 06:20:02 pm
content: Looks like it is a capacitive sensor, like that used in micrometers, where the shaped pads in green and gold have a predictable change in capacitance with rotation, with probably a LED and phototransistor as an absolute point reference. You would have a matching set of offset capacitive leaves on the square PCB's that are close to the round PCB, so that you can use the differential measurement of capacitance to give a unique set of capacitance changes to the modified touch sensor on the board.
Older iPads not installing Apps! (Fix) - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: January 08, 2020, 02:26:30 pm
content: (I apologize if this is not new. Tried searching)...Our Phones are Android, but we still have aniPad-Mini too. Apparently, as others will know, theseolder generation iPads, (including iPad-II?), can not have theirO.S.upgraded beyondVer 9.3.5.Therefore, a lot of new updated apps like 'NetFlix' refuse to download for them! But there's away!'Apple', in their 'wisdom' do not generally make older versions of Apps available from the Store, butit has been found that downloading such Apps on a more modern device/iPhone first, changes theplaying field. (If you have such a device! If not, then read the next chapter). You canTHENgo to theStore on your older iPad, select 'Purchased', (even though it was free), & download from the 'Cloud'.THIS TIME, you will be prompted with a pop-up message to the effect..."Do you want to download an older version that is compatible with your device!". Select 'Yes' !!It will do so, and you now have a fully functional App, like 'NetFlix', that all works fine !!HOWEVER, I didn't have such an alternative more modern Apple Device to perform this trick with!Not to worry!! If you have aPC, (orMac), you can use their normally horrible 'iTunes' package!'ThePROBLEMis, that all their newer releases have taken away the 'App' functionality. (Bastards!).No problem though... Read on...If you go to the following WebSite, you can download a perfectly legalolderversion of 'iTunes'...https://support.apple.com/en-au/HT208079It's called... "Deploy apps in a business environment with iTunes"Scroll down to... "Install apps with iTunes", with options for Mac, PC-32, PC-64.Completely remove your old 'iTunes' installation, after making a backup of your old 'Library' if needed.If it complains that the Library is from a later version, simply rename it, and run again.NOW you have a USEFUL version of iTunes that can deal with 'Apps' (again) as well.'iTunes' can be a bit of a pig, and never made it easy to navigate. If lost, scroll to the bottom of theoriginal screens and select 'Apps' from the textual options. Go to the 'App-Store', find the likes of'NetFlix', and download it. Don't worry about where it went, and you doNOThave to be physicallyconnected to the PC etc. However, it has 'recorded' with your account that you are 'allowed' to have it!You can even shut down iTunes now if you want.Again, you now simply go to your iPad, Store, select 'Purchased' and download it from the 'Cloud'.It will prompt you if you want an older version that works for THAT device, and that's it!!Hope this helps somebody. It worked for me, after a lot of research & trials...
How many integrated circuits do you "consume" yearly? - Page 1
Forum section: electronics / general

author: RoGeorge
author_rank: Super Contributor
timestamp: January 06, 2020, 10:52:55 pm
content: Was doing some parts inventory combined with new year's resolutions, and thinking about how many ICs one uses in a year for personal projects only. Not counting here production units or anything made for sale, also not counting ready made devboards or modules that are bought assambled, but counting, for example, the ones you bought as a kit and assembled yourself.1. From Op-Amps to FPGAs, everything goes, doesn't matter analog or digital or whatever, for example, roughly, how many ICs do you used in projects during 2019?2. Do you prefer to keep stock, or order each time something is necessary?

author: magic
author_rank: Super Contributor
timestamp: January 06, 2020, 11:43:30 pm
content: I don't build much stuff so probably <10 last year. For circuits which I don't intend to use often I also try to minimize their storage footprint and reuse ICs (in one instance even a power transistor) by only mounting sockets on the board. So there is a box with half-empty boards and there is a box with ICs and only a few of each

author: piguy101
author_rank: Regular Contributor
timestamp: January 07, 2020, 04:25:48 pm
content: Probably 100 or so each year. I like to make at least 2 of every board so I always have an immediate backup replacement when things go wrong or a scope probe slips and shorts something.But how many ICs do I buy each year?That's a different story.

author: tom66
author_rank: Super Contributor
timestamp: January 08, 2020, 09:12:37 am
content: 10-100, but most ICs I would use are simple (a dual MOSFET is, strictly speaking, an IC). A few FPGAs that have a higher BOM value than most things put together though.

author: magic
author_rank: Super Contributor
timestamp: January 08, 2020, 09:20:44 am
content: A dual transistor is, strictly speaking, an IC only if it's fabbed on one dieMost are just two dies in one piece of plastic. They may promise "near" locations on the wafer, if you are lucky.

author: tom66
author_rank: Super Contributor
timestamp: January 08, 2020, 09:40:48 am
content: Quote from: magic on January 08, 2020, 09:20:44 amIt's a circuit integrated into a single package; doesn't matter how many dies there are.I use EZR32 processors at work, they consist of an EFM32 plus a Si446x radio in the same package, but as discrete dies. Still an IC, although it contains two dies in one package.
Hunting Trophies - Page 1
Forum section: electronics / general

author: TerraHertz
author_rank: Super Contributor
timestamp: December 22, 2019, 02:45:54 pm
content: On Saturday, in the smokey wilds of Lawson (Blue Mountains near Sydney), deep in the techno-treasure mounds of Smaug's rented storage unit, the intrepid adventurers found... an original IMSAI 8080.Well, the guy on the left found it. While I (on the right) was looking the other way. And it's really the property of the Australian Computer Museum Society now, not a personal spoils of war.But still, it's the first time I ever touched one. After a lifetime of wishing I'd been able to afford one back when they came on the market. Or now for that matter. At least I'll get to play with it eventually.What was your most unexpected treasure find?

author: 25 CPS
author_rank: Frequent Contributor
timestamp: December 23, 2019, 05:46:56 pm
content: I found this HP 523D electronic counter fairly locally, about an 80 km drive from home listed for $40 but the gentleman selling it decided to give it to me while I was on my way to pick it up a couple of years ago. I never thought I’d see one of these columnar display HPs in person, never mind have one in my workshop.

author: German_EE
author_rank: Super Contributor
timestamp: December 23, 2019, 06:43:37 pm
content: Thirty years or so in the past I decided that I wanted to build my own antenna tuner rather than buy one. So, off to the local hamfest I went looking for bits. I had only been there for five or ten minutes when I spotted just the variable capacitor I needed and, next to it, just the variable inductor to match it.Unfortunately they were being held by someone who was trying to negotiate a discount for the pair. I stood there for five minutes thinking 'don't buy them, DON'T buy them' and it must have worked because eventually he returned the parts to the counter and walked away. Within a minute I had them.I used that antenna tuner for nearly three decades before selling the parts on and building an automatic antenna tuner, they went to a good home.

author: bsudbrink
author_rank: Frequent Contributor
timestamp: January 02, 2020, 11:38:39 pm
content: Found this in an estate sale last year. It's all there was. No other electronics of any kind. I asked the staff (who claimed that they set up the sale) and they said that there was nothing else electronics related. Clearly it went with some vintage electronics (probably computer). No idea how it became an orphan. By coincidence I'm now using it with my IMSAI.

author: GlennSprigg
author_rank: Super Contributor
timestamp: January 05, 2020, 02:33:37 pm
content: I must admit, that upon seeing your post, "Hunting Trophies", I was all geared up tosend some flak about defenseless animals being shot in the wild!!!Of course I was happy to see what you had posted!!Obviously, you are an Aussie, so you are less inclined to blast some poor animal to death,so as to hang a 'Trophy' on the wall. Yes, 40 years ago I had a gun, but only hunted rabbitsand that was our FOOD for the night while camping out.I had since found many of YOUR 'treasures' over the decades!! and love the thrill...
robotic lawn mowers? - Page 1
Forum section: electronics / general

author: engineheat
author_rank: Frequent Contributor
timestamp: January 04, 2020, 09:14:12 pm
content: Hi,Are robotic lawn mowers cheap enough/good enough yet? I got a big lawn and would love to cut down on the mowing task. I'm even thinking about modifying my conventional lawn mower (self propelled) to allow it to mow on its own. I'm not talking any fancy AI vision, just some dumb programming to make it mow a largely rectangular area.any advice?thanks

author: wilfred
author_rank: Super Contributor
timestamp: January 05, 2020, 12:07:16 am
content: No, and, No. They are best suited for smaller flatter and fewer "obstacles". Obstacles being anything other than the next blade of grass. You need to lay wire to mark out the boundary and that makes getting to the very edge problematic and then you have long uncut grass you'll be trimming. Then there is the nature strip out front and the possibility of it getting pinched, albeit without the charging station.I think they are best for people who really like the always mown look. And still don't mind fiddling around the edges.If you can afford one then you probably can afford to pay someone to mow the lawns.

author: mathsquid
author_rank: Frequent Contributor
timestamp: January 05, 2020, 02:46:55 am
content: I don't have any advice, but this article might be interesting to you, if a bit dated.https://www.americanradiohistory.com/Archive-Radio-Electronics/90s/1990/Radio-Electronics-1990-06.pdf

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 05, 2020, 03:54:44 am
content: Wouldn't it be fairly simple and cheap to add some wheelchair motors or large R/C car motors to a regular mower along with a R/C receiver? Then you can control it from indoors.

author: Brumby
author_rank: Unknown
timestamp: January 05, 2020, 04:25:14 am
content: You'd have to make it FPV.

author: RoGeorge
author_rank: Super Contributor
timestamp: January 05, 2020, 04:35:29 am
content: How about not even the dumb programming required?

author: Mr. Scram
author_rank: Super Contributor
timestamp: January 05, 2020, 07:01:24 am
content: Quote from: NiHaoMike on January 05, 2020, 03:54:44 amThat sounds far from trivial and the point is not having to control it.

author: Marco
author_rank: Super Contributor
timestamp: January 05, 2020, 11:18:25 am
content: Most seem roomba like random walkers with a wire fence to box them in. Hackaday hada discussionabout doing it with dGPS a few years back.

author: GlennSprigg
author_rank: Super Contributor
timestamp: January 05, 2020, 12:43:36 pm
content: About 13-14 years after my first child was conceived, I seemed to have acquireda semi-autonomous creation to do the lawn-mowing for me !!Unfortunately, it suffered from regular System Failures, requiring Re-Booting!!

author: m3vuv
author_rank: Super Contributor
timestamp: January 06, 2020, 12:49:52 am
content: just get a couple of sheep,job done!
Bluetooth or wireless serial adapter recommendations - Page 1
Forum section: electronics / general

author: Tony_G
author_rank: Super Contributor
timestamp: August 22, 2019, 03:08:28 pm
content: Hi all,I'm getting a little tired of plugging my USB serial cable into my GPSDO and I'm thinking of getting one of those Bluetooth serial adapters like the IOGEAR GBC232A.Anyone have one or have a recommendation for something similar? Doesn't need to be BT but does need to be wireless.TonyG

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 22, 2019, 11:28:51 pm
content: There are lots of fairly cheap Bluetooth UART modules out there such as HC05, or if you'd rather use Wifi, yet another use for ESP8266.You can also consider using a Raspberry Pi Zero W, overkill for just UART but would make sense if you might want additional features like SPI, I2C, or USB later.

author: kjr18
author_rank: Regular Contributor
timestamp: August 24, 2019, 09:09:51 am
content: Open-Smart has some transparent wireless serial modules likethis one here.

author: GlennSprigg
author_rank: Super Contributor
timestamp: August 27, 2019, 12:29:52 pm
content: I'm a 'Musician', and found out a while ago why it's so hard to find BlueTooth hardwareto link the likes of Guitars/Keyboards to a central Amp... It's because of the slight delaysfor the signals, that cause a mismatch with hard wired instruments !!??

author: kjr18
author_rank: Regular Contributor
timestamp: January 04, 2020, 08:03:52 am
content: Quote from: GlennSprigg on August 27, 2019, 12:29:52 pmYes, for this purpose Bluetooth is too complex, thus delays cannot be avoided.

author: Benta
author_rank: Super Contributor
timestamp: January 04, 2020, 04:17:08 pm
content: I find the price of the GCB232 exorbitant. Basically any Bluetooth serial adapter will do the job. Just make sure it contains the Serial Port Profile (SPP) in the firmware.The delays shouldn't be a problem, it's just a serial port with no real-time demands. The OS will probably cause more delays than the BT protocol.
mp3 music decoder board  - Page 1
Forum section: electronics / general

author: nvidia
author_rank: Regular Contributor
timestamp: January 03, 2020, 08:45:13 am
content: i have some wood leftover from something i built so i thought it would be cool to build a small stereo music player with the leftover wood it would make a fun projecthttps://www.ebay.com/itm/Car-MP3-Music-Decoder-Board-Audio-Module-Support-FM-Radio-USB-SD-AUX-Black/223157551336?hash=item33f53a00e8:g:oeIAAOSwLWBbMa2mi want to power it via usb port on a rechargeable power bank i havei have some nice small speakers that can be powered via usb so i will also have them connected to the power bankso i want to know what cable i would need to power this and what cable i need to be able to connect the 3.5mm headphone jack toothanks

author: kjr18
author_rank: Regular Contributor
timestamp: January 04, 2020, 08:29:37 am
content: Those speakers you speak of have two connectors? 3.5mm jack and usb for powering? I ask because there are usb powered speakers that have only USB connector, for both power and audio (there is a usb audio chip inside these), and those are not really fitted for that purpose. If you had enough space inside, you could try putting li-ion cell inside case, with charging board, something like TP4056 modules that are really cheap and common on ebay. Then you could eliminate powerbank and have more stand-alone solution.
iPhone hack security article - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: August 27, 2016, 01:24:32 pm
content: "a powerful and unique monitoring tool, called Pegasus, which allows remote and stealth monitoring and full data extraction from remote target devices via untraceable commands,"http://www.usatoday.com/story/tech/news/2016/08/26/shadowy-israeli-firm-behind-apple-hack-tool/89408936/

author: Halcyon
author_rank: Unknown
timestamp: August 27, 2016, 11:54:39 pm
content: Saw this come out last week. Basically, anyone with an iPhone should update their device softwarenowor better yet, get an Android handset and break the shackles ;-) *ducks*

author: raptor1956
author_rank: Frequent Contributor
timestamp: August 28, 2016, 04:26:01 am
content: My guess is the NSA has this tool now and now knows another avenue to seek new exploits. They haven't been moaning so much lately about not being able to spy on the bad guys -- and everyone else for that matter...Brian

author: Halcyon
author_rank: Unknown
timestamp: January 03, 2020, 09:16:08 am
content: Certain vulnerabilities have been known to the cyber security community for years, which allow complete file system extractions and brute forcing/bypassing of PINs/passwords (even up to the latest hardware and iOS versions). I guess as a consolation, it involves a more than just someone with a data cable and laptop which is why Apple haven't made any serious attempts to patch them.

author: Jeroen3
author_rank: Super Contributor
timestamp: January 03, 2020, 09:58:14 am
content: This article is from 2016! It names iOS version 9.3.5, we are currently at 13.3.

author: m3vuv
author_rank: Super Contributor
timestamp: January 03, 2020, 12:28:53 pm
content: anything with an apple logo on it should be buldozzed into a pit and burnt and the owners sent off for re education!!

author: Halcyon
author_rank: Unknown
timestamp: January 04, 2020, 02:03:20 am
content: Quote from: Jeroen3 on January 03, 2020, 09:58:14 amThis particular exploit is old, but there are others which remain to this day.
Hello - Page 1
Forum section: electronics / general

author: cyberwasp
author_rank: Contributor
timestamp: December 31, 2019, 09:26:35 pm
content: Am new to this board and can't see how to place the post in the appropriate forum. So here goes.When I was young I used to build heath kits with my dad and then went to just buying parts and building all sort of things from radios to transceivers. Well along came the PC and I got hooked on the internet where I mostly played around. Not being a gamer I went into editing Photos and until recently just edited for fun. Now at 63 it's my job and I work from home since I'm in Florida and my boss is in California.In my spare time I've become a Mr. fixit for the community working on simple thing like Pc's, phones, solar lights the usual household items. I've setup a work bench and purchased my first Oscilloscope. My main reason for joining is to learn as much as I've forgotten. Here's hoping you can teach an old dog new tricks

author: DuPe
author_rank: Regular Contributor
timestamp: December 31, 2019, 10:39:11 pm
content: Welcome to the forum.even better spot for introduction ishttps://www.eevblog.com/forum/chat/new-member-please-introduce-yourself/cheersPeter

author: cyberwasp
author_rank: Contributor
timestamp: January 01, 2020, 02:21:09 pm
content: Quote from: DuPe on December 31, 2019, 10:39:11 pmPeter. When I go there I can't find an icon to post a message. Also when I posted the above message there wasn't an option to select which area to post it to.

author: GlennSprigg
author_rank: Super Contributor
timestamp: January 02, 2020, 02:36:52 pm
content: I wonder if you mean...If you are starting from the top the screen, and click on the 'Home' button...Then you will be at the top of the 'tree', as in the following image. Bellow, you can seethe various general topics, as in 'General Chat', or 'General Computing' etc...Below, you will see the likes of this, if you had selected 'General Chat'. I know that thisseems obvious, but notice thered boxI made at thetop, showing where you are...If you now click the 'New Topic' button as shown in red on the top-right of this picture...Then you start a new topic injust that section, being 'General Chat' as in the prev picture.The point I'm making, is that youdon'tselect the category/sectionafterclicking 'New Topic'.You go into that section first. If I'm off-base then sorry...
Happy New Year to all, best wishes everyone & hope 2020 is a great year for all! - Page 1
Forum section: electronics / general

author: Terry01
author_rank: Frequent Contributor
timestamp: January 01, 2020, 01:17:30 am
content: As the title says " best wishes to everyone" all the way from Scotland and no matter where you are I hope 2020 is a great year for you all.Happy New Year everyone!

author: TerraHertz
author_rank: Super Contributor
timestamp: January 01, 2020, 10:11:03 am
content: I'm finding it hard to type 2020 instead of 201x.Ageing, measured in how long it takes to relearn the year muscle memory, each new year.

author: BillB
author_rank: Unknown
timestamp: January 01, 2020, 01:15:38 pm
content: Happy New Year!

author: GreyWoolfe
author_rank: Unknown
timestamp: January 01, 2020, 08:29:04 pm
content: Best wishes for a wonderful, happy and prosperous New Year.
TV remote does not work direct to TV but does off rear wall - Page 1
Forum section: electronics / general

author: timgiles
author_rank: Regular Contributor
timestamp: January 01, 2020, 05:06:31 pm
content: Hi.I have a 2yo Sony TV and for some time the remote will not work if pointed at the TV. Pointed at the wall behind, to the side walls, ceiling - works a treat. Batteries used can be alkaline or lithium type AAs - same behaviour.TV is in a cinema room in our basement - no external light source. Only lights are three low wattage halogens. Same issue whether they are on or off.Any thoughts?

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 01, 2020, 05:14:39 pm
content: IR receivers can suffer from overload - could be that with low ambient light the receiver gets distorted by a strong signal

author: Benta
author_rank: Super Contributor
timestamp: January 01, 2020, 05:24:41 pm
content: Yep, receiver overload. Place a bit of coloured Tesa over the receiver opening (or the remote transmitter).
Non-technical relatives - Page 1
Forum section: electronics / general

author: TerraHertz
author_rank: Super Contributor
timestamp: December 29, 2019, 10:55:13 pm
content: Do you have an impressive collection of technical equipment and books, of high utility and/or historical value?And you are getting on in years?Well here's a thought. Please ensure you have made arrangements for the disposition of your possessions to others with the capabilities to value, use and preserve them, in the event you become incapacitated or pass away.As a member of the Australian Computer Museum Societyhttp://acms.org.au/, in recent days I've been helping deal with a storage unit full of items from a famous person. Due to age and ill health he's been unable to oversee his collection for some years. His family apparently stored all of it in some not-very weather proof space (a garage?) for a while, then finally moved everything to a commercial storage unit.MOST things were still OK, but it seems some boxes were on a wet floor at some stage. These books are selected examples of the result. They are 'book bricks' - pages stuck together into a solid mass. The C++ one in particular is like concrete. (Quite ironic.)

author: German_EE
author_rank: Super Contributor
timestamp: December 30, 2019, 06:03:03 pm
content: Books, no, but when it comes to my equipment I've left it to someone who will recognize the wheat from the chaff.

author: GlennSprigg
author_rank: Super Contributor
timestamp: December 31, 2019, 02:09:00 pm
content: That's a good idea TerraHertz. I've lost SOOO much stuff over the decades, of technical andhistorical interest, that it's not funny!! Mainly due to the orig wife running off & property sales!
Neopixel rings have "magic behavior" - Functions without GND - Page 1
Forum section: electronics / general

author: GrandTheftAuto4life
author_rank: Contributor
timestamp: December 30, 2019, 08:53:54 pm
content: ...So I have picked up a box of various components locally few days ago from a guy who have lost interest in electronics.Nothing interesting, except for these nexpixel rings that somehow is able to function when using only two pins.Only VCC and DataIN is connected. GNS isnotconnected.If i connect GND, these will only light up randomly and be very dimmed.I assume it's able to seep back to my arduino mega when the dataIN pin goes low. but in theory this shouldn't be possible.Can someone provide a better explanation?

author: james_s
author_rank: Super Contributor
timestamp: December 30, 2019, 09:00:26 pm
content: That has to be exactly what's happening, you have to have a return path for the current, there's no way around that. The surprising thing is that connecting ground causes them to malfunction. Are you sure the input pins are labeled correctly?

author: amyk
author_rank: Super Contributor
timestamp: December 30, 2019, 09:01:08 pm
content: It's definitely drawing power from I/O and ESD diodes. Dave has a video about this.

author: GrandTheftAuto4life
author_rank: Contributor
timestamp: December 31, 2019, 04:31:16 am
content: Quote from: james_s on December 30, 2019, 09:00:26 pmyeah. it's just something i've never seen before
Quick AR speaker repair - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: January 01, 2020, 01:06:26 pm
content: I have these nice small, but quite reasonable for the price (free to me) Acoustic research active speakers, that I have had for a long time. They are my standard PC audio speakers. 18VDC SMPS provides them with power, a recent upgrade from the old block on a cord they came with.Problem has been intermittent loss of the one audio remote speaker, and I decided to open the unit, and see if it was repairable. Front mesh can come off, and there are 8 screws hiding under there. Pop the case halves apart, and look for dry joints on the input and output side. Soldered all of them anyway, and then went for the volume and tone controls while open. Look at the boards, and see that the capacitors are reasonable, well, at least reasonable for being in there for close to 3 decades, being Gemcon no temperature range ones, and not leaking. Not wanting to disturb those fragile ribbon cables soldered to the board too much, just upgraded the input side capacitor from 100uF to 1000uF, because it looked a little unhappy, but still, it meets is spec, 100uF more or less, ESR under 1 ohm, but still, easier to replace with new anyway, 1000uF 25V 105C REC brand, because that is on hand, and will fit there, unlike the larger Nichicons I took out.Close it up, and audio is back, both channels, and passes the "makes sound close enough" test. Inside the case there is an interesting wrinkle, the moulds have the designer's names embossed into the plastic, a thing you do not see often, though, seeing as the speakers are magnetically shielded, and the date code looks like 1992, they are well past being able to vote anywhere.Tiny little speakers, no model number anywhere on them, and I have not seen them anywhere either, and not a current or discontinued unit on AR website either on cursory look, but nice speakers anyway, and capable of being quite loud for the size.
Electronics symbol chart - Page 1
Forum section: electronics / general

author: Acidsky
author_rank: Newbie
timestamp: December 27, 2019, 09:20:22 pm
content: hi guys, new to the forum,i was wondering if someone has a electronic symbols chart that is printable (something like the electromagnetic radiation chart dave found a while ago)i would like to print it as a poster and hang it on my wall in my workshop

author: German_EE
author_rank: Super Contributor
timestamp: December 28, 2019, 10:52:18 am
content: Send me a PM with your email address and I'll let you have some useful stuff to print off.
Dave's earbud/headphones. Saw in a video some time back. What type? - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: September 17, 2019, 08:40:54 am
content: Watching a video weeks ago and Dave mentioned his non ambient noise blocking earbuds. Didn't write down the brand or type at the time.I would like a pair.

author: EEVblog
author_rank: Unknown
timestamp: September 17, 2019, 08:47:58 am
content: Auglamour RX-1 now obsolete

author: EEVblog
author_rank: Unknown
timestamp: September 17, 2019, 08:51:28 am
content: https://www.gearbest.com/earbud-headphones/pp_448880.html

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: September 17, 2019, 08:52:58 am
content: Mercy bo coo.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: December 28, 2019, 02:39:07 am
content: Something similar yet quite different. Bone conducting.
Forum for McIntosh Audio Components - Page 1
Forum section: electronics / general

author: Filter_head
author_rank: Contributor
timestamp: November 29, 2014, 12:28:16 pm
content: For those interested in McIntosh audio hardware, a dedicated forum has been created.If you're into the repair, refurbishing of vintage McIntosh amps, preamps, and other components, your contributions are encouraged.http://www.northreadingeng.com/Forums/

author: innkeeper
author_rank: Unknown
timestamp: December 26, 2019, 08:37:02 pm
content: looked like that might have been interesting... what became of it?the link doesn't seem to be a working link anymore
Sunvic energy regulator  - Page 1
Forum section: electronics / general

author: cowasaki
author_rank: Frequent Contributor
timestamp: December 25, 2019, 01:53:58 pm
content: I got a few of these in a box of variacs.Any idea what they are used for?

author: amyk
author_rank: Super Contributor
timestamp: December 25, 2019, 11:09:34 pm
content: That was easy...http://museum-assets.ultimheat.com/pdf-www/1979%20Satchwell%20Sunvic%20Energy%20regulators%2020150619.pdf

author: cowasaki
author_rank: Frequent Contributor
timestamp: December 26, 2019, 12:51:56 am
content: Quote from: amyk on December 25, 2019, 11:09:34 pmSorry, I've seen that but can't work out what it is on about. Is it that the current drawn heats the switch which shuts it off until it cools? Seems a strange way to set it? Not sure where that would work. I've at least two of these and when I hooked them up the switch comes on and then goes off after a short time. I didn't leave it to find out if it switches back on again. I wouldn't be happy with things that with on at some random time after switching off...

author: oPossum
author_rank: Super Contributor
timestamp: December 26, 2019, 02:29:28 am
content: https://en.wikipedia.org/wiki/Infinite_switch

author: cowasaki
author_rank: Frequent Contributor
timestamp: December 26, 2019, 10:46:22 am
content: Quote from: oPossum on December 26, 2019, 02:29:28 amThanks. I didn’t know it was also called an infinite switch.
Old Multimeter found in dumpster - Send it to Dave for teardown?  - Page 1
Forum section: electronics / general

author: EazyCzE
author_rank: Newbie
timestamp: December 23, 2019, 09:01:23 pm
content: Hi,I found old multimeter in dumpster. I'm thinking of sending it to the mailbag (monday)They say it's called the devilbut the postage seems pretty expensive to me.What do you think? Send it?

author: tunk
author_rank: Super Contributor
timestamp: December 23, 2019, 09:11:44 pm
content: Or send it to Diodegonewild:https://www.youtube.com/channel/UCQak2_fXZ_9yXI5vB_Kd54ghttp://danyk.cz/index_en.html

author: EazyCzE
author_rank: Newbie
timestamp: December 23, 2019, 09:15:32 pm
content: Ha! Sometimes I visit his site. I didn't even know he had a youtube channel. Thanks for the tip.Great accent,I've probably seen something from him already ..

author: wilfred
author_rank: Super Contributor
timestamp: December 23, 2019, 11:00:23 pm
content: I hadn't heard of Diodegonewild. Thanks for that. He seems a bit like Big Clive in terms of video style and content. I'm only going by the thumbnails so far.I see he did a video on an old multimeter in the past week and this one you have seems of a similar vintage (ie. pretty old). So it may be of interest to him. I'd say send it to him, especially if it is cheaper for you.

author: EazyCzE
author_rank: Newbie
timestamp: December 24, 2019, 12:08:10 am
content: Yes, it is about 10 times cheaper.

author: magic
author_rank: Super Contributor
timestamp: December 24, 2019, 09:28:28 am
content: Fix it and post a thread with internal pics so people can rant how it doesn't meet CAT rating requirements
A lair of thieves, or a repair resource? Let the EEVblog community judge! - Page 1
Forum section: electronics / general

author: george.r
author_rank: Contributor
timestamp: December 21, 2019, 05:15:41 am
content: I was randomly trawling the web for perhaps a leaked datasheet (long story short, just a xDSL modem thingy with a MIPS CPU I wanna tinker with), and I stumbled upon this:http://bbs.ntpcb.com/so.php?fid=22,89&keyword=PCB&page=128Some of the threads have whole PADS/Altium files for the design attached, BoM's, the works. What do you guys make of that? I don't think they were originally intended to be open hardware

author: ataradov
author_rank: Super Contributor
timestamp: December 21, 2019, 05:36:42 am
content: Looks like PUDN, but for hardware. Seems like a good resource.

author: wraper
author_rank: Unknown
timestamp: December 21, 2019, 05:37:59 am
content: Back in the day you got schematic with basically anything you bought.

author: amyk
author_rank: Super Contributor
timestamp: December 21, 2019, 05:40:31 am
content: You've found a lair of the Shanzhai.

author: all_repair
author_rank: Frequent Contributor
timestamp: December 21, 2019, 06:03:28 am
content: I don't understand you are looking for LEAKED and you calling on a place that may have what you are looking for.

author: george.r
author_rank: Contributor
timestamp: December 22, 2019, 02:51:54 am
content: Heh, I know, it's just that I don't have $ enough to sign an NDA with Broadcom. Whilst I think more things should have schematics available (I'm all for Right to Repair), providing the original project/artwork files, well, it is a no-no for closed hardware, no matter how you spin it - even more so in a country where copyright is worth as much as a three dollar bill. I am kinda appalled to see that sort of stuff go unchallenged.

author: coppercone2
author_rank: Super Contributor
timestamp: December 24, 2019, 05:08:48 am
content: I don't give a shit, they keep reducing quality, maintaining poor service and obsfurating+you can get repair scams on boutique items. not to mention you get threatened with pandoras box with voided warrentees.and they have some great 'steals' there too. a max232 PCB. Wow, you need aladin to figure that shit out!
Can anyone spot a date code? - Page 1
Forum section: electronics / general

author: moboch
author_rank: Contributor
timestamp: December 16, 2019, 10:49:22 pm
content: Hi I was curious when my function generator from eBay was manufactured. I attached a photo of the main PCB and already looked for Datecodes myself, but I highly doubt that it was made in 56 or even 47. Anyone seeing a more plausible number?

author: bitwelder
author_rank: Super Contributor
timestamp: December 17, 2019, 09:29:11 am
content: The big electrolytics sometimes have a date code as well. Did you check them?

author: envisionelec
author_rank: Frequent Contributor
timestamp: December 19, 2019, 08:31:38 pm
content: Mid 1980's judging by the PCB construction and ECAD software which was probably a Protel type.

author: Clarmrrsn
author_rank: Contributor
timestamp: December 19, 2019, 09:43:45 pm
content: Just curious but what make + model is said device?

author: StillTrying
author_rank: Super Contributor
timestamp: December 19, 2019, 10:29:49 pm
content: Can't see a date, I'd wild guess around 1978.

author: sorenkir
author_rank: Regular Contributor
timestamp: December 20, 2019, 10:38:30 am
content: My guess:https://www.radiomuseum.org/r/elektronik_function_generator_tr_045_4.htmlMichel.

author: moboch
author_rank: Contributor
timestamp: December 20, 2019, 02:22:24 pm
content: sorenkir ist right! I'm impressed! From where did you know that?

author: White Rabbit
author_rank: Newbie
timestamp: December 22, 2019, 04:28:20 pm
content: Oh, yes, I can see soviet resistors (red and gray colours) and keys switch station! (sorry my bad English, I am newbie).Switch is not bad, but he has silver plated contacts, they could be coated with oxide. I always use silicon grease after cleaning contacts with alcohol or solvent.Silicon grease will protects silver from air.

author: moboch
author_rank: Contributor
timestamp: December 22, 2019, 05:56:17 pm
content: If you want more pictures of that beauty:https://www.eevblog.com/forum/testgear/vintage-electronics-hungarian-function-generator!/

author: Clarmrrsn
author_rank: Contributor
timestamp: December 23, 2019, 11:41:47 pm
content: Cant seem to get your link to work.Or is it just my Ipad playing funny beggers??

author: StillTrying
author_rank: Super Contributor
timestamp: December 24, 2019, 01:23:25 am
content: It doesn't work on a PC either.www.eevblog.com/forum/testgear/vintage-electronics-hungarian-function-generator!/

author: moboch
author_rank: Contributor
timestamp: December 24, 2019, 07:37:40 am
content: It seems to work fine for me?
What do you want your kids to buy you for Christmas? - Page 1
Forum section: electronics / general

author: Johnny10
author_rank: Frequent Contributor
timestamp: December 22, 2019, 03:23:38 pm
content: For the past four Christmas Holidays the best present I could receive and the easiest to tell my kids to get me was a gift certificate from my local surplus store.But sorry to say that store closed and this year I could make no easy requests.With Santa dropping down the chimney in just a few days I wonder what he will bring?Happy Holidays and wishing you the wonders of surprise gifts to fulfill your TEA.

author: Bud
author_rank: Super Contributor
timestamp: December 22, 2019, 04:00:54 pm
content: Second hand electronics engineering books from Amazon marketplace. Special request for hardcover editions, hate paperback. Reasonable prices.

author: andy3055
author_rank: Super Contributor
timestamp: December 23, 2019, 02:56:47 am
content: Really? Are you looking for EE books?
Can anyone recommend a sale/inventory/expense system for a small home business - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: December 22, 2019, 11:35:18 pm
content: Does anyone run their own small electronics business and can recommend an easy to use tool for sales/inventory/expense tracking?I had a look around some solutions out there but couldn't find anything that was are either free or paid but good/simple enough to justify the on-going monthly costs.I started writing my own app+database a week ago and its coming along well, but would prefer an already working solution if i can find one.

author: tautech
author_rank: Super Contributor
timestamp: December 22, 2019, 11:48:35 pm
content: Did you see the inventory management tool Defpom has done:

author: VK3DRB
author_rank: Super Contributor
timestamp: December 23, 2019, 12:53:43 am
content: Wave Accounting does not do inventory, but is an excellent simple accounting system that is genuinely FREE. It is better than a number of well-known paid accounting programs. It does invoicing, reports, expenses, sales, tax calculations etc. Wave is a well established and trusted Canadian company.https://www.waveapps.com/What's the catch? There isn't one. They make money if you use the option for online sales to go through their payments system for a 1.75% transaction fee.

author: PTR_1275
author_rank: Frequent Contributor
timestamp: December 23, 2019, 02:49:42 am
content: We use quickbooks. We looked at xero and a few others, but decided on quickbooks.
Rant: Anyone with Intel user account or working there? - Page 1
Forum section: electronics / general

author: Yansi
author_rank: Super Contributor
timestamp: December 28, 2019, 11:16:10 pm
content: I have just decided to download another device package for my copy of Quartus, unfortunately the ill-designed Intel web page is preventing me from doing so.I have been registered years back on the Altera website. Now I need likely a new registration for Intel, but can't do so. I am always told a "network error" and that I should contact account support. Great, but to contact the support, I need the account in the first place. Stupid!I don't give rats ass about your SupportApp for Googledroid or SheepOS, butIf this read anyone from Intel, go and fix your shit up!

author: GlennSprigg
author_rank: Super Contributor
timestamp: December 29, 2019, 01:43:26 pm
content: Intel Admin here...Please stay on the line. Your business is important to us!!We will respond as quickly as we can. In the mean-time, enter '3' for Musac.The Aussie site works??https://www.intel.com.au/content/www/au/en/homepage.html
'Disqus' comment detected as spam, not displayed at all - Page 1
Forum section: electronics / general

author: RoGeorge
author_rank: Super Contributor
timestamp: December 19, 2019, 04:36:01 pm
content: Anybody here knows how 'Disqus' is suppose to be working? I made an account some months ago, don't remember why, and now I used it to reply to another Disqus comment on a blog. Only 2-3 sentences, no links.First it said it's awaiting for moderation. OK. Now it is shown as spam in my Disqus page, and not shown in the blog where I was commenting.Anybody else here using Disqus? How is this suppose to be working? Am I doing something wrong?

author: Kilrah
author_rank: Unknown
timestamp: December 19, 2019, 04:47:28 pm
content: That's probably the blog owner having enabled moderation for all comments and he decided it was spam...
EEVBlog in MR. Robot - Page 1
Forum section: electronics / general

author: itelite
author_rank: Contributor
timestamp: December 19, 2019, 10:36:43 pm
content: Pretty sure i caught the EEVblog Multimeter in the newest episode of Mr. Robot.

author: 001
author_rank: Super Contributor
timestamp: December 21, 2019, 04:12:30 pm
content: who is robot guy?
Need help with GIS System/ Open Data - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: December 21, 2019, 03:29:49 pm
content: Here are Open Data but the dont say with Format it is.https://www.data.gv.at/katalog/dataset/28b67f1f-c24d-4bd4-8f9e-007a3d63135fhttp://noe.gv.at/noe/OGD_Detailseite.html?id=28b67f1f-c24d-4bd4-8f9e-007a3d63135fQGis show me the Data on the Display but when I try to export them for Google Earth the result is not usable.I guess the dont know with format is is. Can soneone help me to export the Data for Google Earth in QGis?Thanks