hybridfree/eevblog-posts huggingface dataset:
TDA2030A - Page 1
Forum section: electronics / general

author: GigaJoe
author_rank: Frequent Contributor
timestamp: August 07, 2018, 02:00:22 am
content: Figureout finally ( probably, I think ... , maybe)so TDA2030A - obsolete , but still a lot on market (as relabeled) and, I find-out a Chinese clone actually as :YD2030ACD2030AUTC2030AD2030Ait was designed in 2004 ... and still in prod.PDF: basically translation of the original TDA2030a , absolutely the same numbers/parameters ...https://ae01.alicdn.com/kf/HTB1uzWYfA9WBuNjSspeq6yz5VXad/10PCS-LOT-CD2030A-D2030A-D2030-TDA2030A-TO-220-AUDIO-POWER-AMPLIFIER-CIRCUIT-NEW.jpgthere are 2 diff packages, or 2 diff manuf. (or maybe 3 diff ...)the good thing:it definitely not a fake or counterfeit chipand it would be fun, as soon as I will receive a package, due to cost around 12 cents per chip ....(interesting .... wonder if possible to use it in a power supply, like make a power supply, or splitting , or even 4-quadrant .... hmm )

author: CJay
author_rank: Super Contributor
timestamp: August 07, 2018, 07:00:53 am
content: I've used loads of the TDA2030 amplifiers for radios, test amps, even an AM modulator. They're not 'HiFi' by and reasonable standard but they're pretty good for the price.Will be interesting to try a few of the Chinese clones (I probably already have if they've been remarked as ST),
The Vangelis Hawking Tribute - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: August 06, 2018, 06:28:51 pm
content: Yes, there are other versions of this, but I like this version of the Hawking tribute the best. What's totally cool is that the ESA transmitted the tribute from their Spanish dish in the direction of the nearest black hole.Five minutes thirty eight seconds well spent.
How Does AdSense Work  - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: August 02, 2018, 12:33:37 pm
content: made a website like 2weeks ago and added google ads to it but wanted to knowunder Estimated earnings it always says $0.00 under Today so far Yesterday ectbut under Performance it shows my page views click and rpc ectso why is Estimated earnings showing $0.00

author: GlennSprigg
author_rank: Super Contributor
timestamp: August 05, 2018, 02:50:54 pm
content: Please excuse me if I say anything wrong......Google's numerous 'advertising' systems have changed a lot.'AdSense' "allows" you to have 'ads' placed (by yourself) within your webpage, described in......https://www.google.com/adsense/start/how-it-works/#/Frankly, I've never placed much faith in it...There used to be a 'feature' called "AdWords", which now falls under "Google Ads".This WAS about Buying/Selling certain key-words/phrases like on the Stock-Market !, to hopefullyadvance one's 'standing' in the priority ordered list when people do a Search.'Less' used words, like 'yellow', or 'farming' might be "bought" for say 2c to 5c per 'click', but moreimportant words/phrases like 'real estate', or 'car sales' or 'software' may cost from say 80c to $2.50per 'click' !!!! Every time someone simply 'clicks' on your high search engine result, you are BILLEDthat amount. However, you select an upper limit for each day etc. (Imagine an 'opposition' companydeliberately clicking your 'link' 500 times to give you a huge bill !!!)There are 'many' almost 'free' options to promote websites, especially if your site/product is NOT mainstream.B.T.W., the OLD ways of including lots of 'Meta-Tags'.... (Meta tags are snippets of text that describe a page’scontent; the meta tags don’t appear on the page itself, but only in the page’s code).For instance, for an excavation company......<meta name="keywords" content="Excavators,Excavating,Diggers,Machinery,Civil,Contractors"> etc etc...These have VERY LITTLE meaning any more, as people LIE in order to 'draw' people to their Site !!!INSTEAD, it is compared HEAVILY with the ACTUAL textual content on all the pages of your 'Site'......And in fact, if this does NOT coincide, then you are actually virtually 'Dropped off the Radar' !!So, how to be recognized by Google.... Countless ways..... though start with this reading......https://www.wikihow.com/Get-Your-Website-Indexed-by-GoogleThe MOST important thing to remember about 'Google', is that Links, Links & MORE Links are important!They LIVE on links!!! Link your site to others. Link it to Social Media. Link all that BACK to the 'Site'......

author: sony mavica
author_rank: Frequent Contributor
timestamp: August 06, 2018, 01:21:49 pm
content: Quote from: GlennSprigg on August 05, 2018, 02:50:54 pmthanks
Power supply 12volt need to increase 14volt - Page 1
Forum section: electronics / general

author: Ali Rao
author_rank: Newbie
timestamp: August 07, 2018, 08:09:58 am
content: Hi All.need to increase server power supply 12volt to 14 volt for battery charger. how to modify please advise.

author: Kjelt
author_rank: Super Contributor
timestamp: August 07, 2018, 08:32:44 am
content: Add a 2V battery in series.No serious, you write no typenr no specifications no pictures nothing, do you know how many server supplies there are in the world ?Your chances are slim though, best bet is to find a potentiometer where you can fine adjust the output voltage, to find it we need pictures of the pcb.

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 07, 2018, 02:21:27 pm
content: If it's a surplus HP server PSU, disabling the OVP takes quite a bit of rework. I think there are actually two OVP mechanisms that I had to disable in the 1200W that I hacked into a charger for a 4S LiMn pack. And then a bit more hacking to turn it into a current source instead of a voltage source like it was originally.
How to replace Ge transistors with Si in test gear? - Page 1
Forum section: electronics / general

author: 001
author_rank: Super Contributor
timestamp: July 17, 2018, 05:37:35 am
content: Hi!I have old 15MHz millivoltmeter based on Germanium transistors. Some transistors are dead.Can I replace it with common Silicon 2n3904 bc547 etc?Thanx

author: PhilipPeake
author_rank: Regular Contributor
timestamp: August 04, 2018, 01:26:50 am
content: Old post, but here is my answer anyway:Yes, but probably not easily.First, most old germanium transistors are pnp and most modern silicon transistors are npn. You can't reasonably substitute npn for pnp.Next, the bias setup will probably need to be adjusted. The base bias voltage is around 0.3 volts for germanium and 0.6 volts for silicon.If you have a circuit diagram it will help a lot. If not, its going to be more work.You might want to see if you can identify the transistors and try to locate some NOS somewhere.

author: Gyro
author_rank: Super Contributor
timestamp: August 04, 2018, 11:08:12 am
content: There are nearly as many PNP Silicon transistors as there are NPN, that's not a problem. The real issue is getting the biassing right as PhilipPeake says, it might be as easy as just adjusting a few biassing resistor values.If it's a relatively simple circuit then you should be able to reverse engineer a schematic. The PCB will probably only be single sided with hand placed track layout.The other problems you might encounter are that Silicon replacements will almost certainly have much higher gain and also higher Ft. That might possibly cause stability problems but hopefully not insoluble.

author: Wolfgang
author_rank: Super Contributor
timestamp: August 04, 2018, 02:42:46 pm
content: Which ones are dead ? Maybe you can still get some on eBay. Ge transistor gains are normally varying a bit more than Silicon,you might have to watch gain groups (if present) and do some adjustments. Much luck !
PURE5001H Datasheet - Page 1
Forum section: electronics / general

author: Mike Warren
author_rank: Unknown
timestamp: August 06, 2018, 02:36:11 am
content: I'm guessing this goes by another part number as my Google-foo is not working for me today.i get a few matches for other part numbers, but they are not the correct part.It's a car stereo audio power amplifier.Anyone know where I can get a datasheet?

author: amyk
author_rank: Super Contributor
timestamp: August 06, 2018, 03:12:21 am
content: A quick Google shows that ST does sell the part as PURE5001H.According to the Russians, it is the same as TDA7560.

author: Mike Warren
author_rank: Unknown
timestamp: August 06, 2018, 03:18:33 am
content: Thank you for your reply.Quote from: amyk on August 06, 2018, 03:12:21 amI have no idea how you found that. My google searches did pull up a materials declaration that mentions PURE5001H-4WX, but nothing more, and the ST site comes up with no matches.QuoteThat does look like it. Thank you.

author: amyk
author_rank: Super Contributor
timestamp: August 06, 2018, 03:25:40 am
content: Not in stock, but...https://www.mouser.com/ProductDetail/STMicroelectronics/PURE5001H-4WX?qs=%2fha2pyFaduh9r9Ld3p6i%2ffzSkgU%2fb2Mh5hHjS0kuqd4%3dI suspect it's just a rebranding of the '7560 for a specific customer.

author: Mike Warren
author_rank: Unknown
timestamp: August 06, 2018, 03:28:57 am
content: Quote from: amyk on August 06, 2018, 03:25:40 amOh, yes, I did find that, but no datasheet.QuoteThis is in a current model Alpine stereo.

author: BrianHG
author_rank: Super Contributor
timestamp: August 06, 2018, 03:57:16 am
content: This was all I could find: See image...I cant guarantee anything, so, you will need to probe with your voltmeter and guess....

author: Mike Warren
author_rank: Unknown
timestamp: August 06, 2018, 04:03:07 am
content: Quote from: BrianHG on August 06, 2018, 03:57:16 amThanks. I've now got the TDA7560 datasheet and it matches well.
Looking for a very small Android phone with these characteristics - Page 1
Forum section: electronics / general

author: ikrase
author_rank: Regular Contributor
timestamp: August 03, 2018, 07:49:08 am
content: I apologize if this isn't the best forum to post in. I did my best to do a search and didn't come up with much.I'm looking for an Android smartphone or tablet with the following properties:- Reasonably modern Android version- Fully functional USB OTG- 3 to 4 inch size.

author: Halcyon
author_rank: Unknown
timestamp: August 03, 2018, 11:03:36 am
content: You'rereallylimited for choice with LCDs that small and support for OTG. To find that in a modern Android device is very rare. That's not to say they don't exist, but they are probably made by some obscure Chinese manufacturer and are of dubious quality.Probably the best of the phones which meet your specifications are the Samsung Galaxy S III Mini or the Sony Xperia Sola but both are quite old.If you can deal with a slightly larger display, I'd recommend something like the Sony Xperia XZ2 Compact, Nokia 3 or a Samsung Galaxy J3.

author: ikrase
author_rank: Regular Contributor
timestamp: August 03, 2018, 07:16:05 pm
content: Unfortunately, the display physical size is essentially the figure of merit for this project.I know there are various Android single board computers out there with plenty of USB ports. However, finding a screen is still challenging - it's hard to find a display of that size which has even VGA resolution, let alone typical smart phone DPI (though I'd be interested in any tips).

author: rsjsouza
author_rank: Super Contributor
timestamp: August 03, 2018, 07:56:10 pm
content: I saw this Unihertz Atom at 2.4in at the website below, but then found out that it is a kickstarter.https://www.androidauthority.com/best-small-android-phones-782746/amp/An older flagahip phone perhaps? A Galaxy S2 is 4.3in.

author: ikrase
author_rank: Regular Contributor
timestamp: August 04, 2018, 04:27:19 am
content: Huh. Interesting. It looks like the Atom is actually happening -- it seems there are prototypes.One thing I found is the Udoo ARM single board computer, plus some 3.5 inch HDMI VGA-resolution displays, which would achieve my needs -- but there is still the question as to whether it would still function reliably (and it's stuck on Android 6 which is... not great.)As for what I'm trying to do? I'm trying to make a Seek Thermal CompactPro into a monocular-type camera. For which I need an OK-resolution, small size display to put under a loupe.
Need help with playlist - Page 1
Forum section: electronics / general

author: In Vacuo Veritas
author_rank: Frequent Contributor
timestamp: August 02, 2018, 05:11:18 pm
content: I've packed my bags for Mars, now I just need a six month playlist to pass the time on the way there. I'll put in all the EEVblog videos, what else can I put in there?

author: onesixright
author_rank: Frequent Contributor
timestamp: August 02, 2018, 05:21:55 pm
content: Packed a drum kit? :-)

author: In Vacuo Veritas
author_rank: Frequent Contributor
timestamp: August 02, 2018, 05:56:32 pm
content: Never mind, I found it

author: tooki
author_rank: Super Contributor
timestamp: August 03, 2018, 09:41:44 pm
content: And when that is finished, continue with this! (Remastered in 4K!!)https://youtu.be/SkgTxQm9DWM
Questions about firmware-based TPMs - Page 1
Forum section: electronics / general

author: gisus
author_rank: Newbie
timestamp: August 16, 2018, 10:46:46 am
content: Hello.1. Does AMD PSP have the similar function to Intel TXT, which can act like a TPM?2. Where do they store passwords, in CPU or on motherboard?3. Where to find AMD CPUs with PSP enabled? I cannot find a place like Intel ARK.Thanks.
Amazon Free Trial Scam? - Page 1
Forum section: electronics / general

author: rdl
author_rank: Super Contributor
timestamp: August 02, 2018, 05:39:12 am
content: On June 11 an email from Amazon was received announcing "Free Trial of Amazon Prime". I only glanced at it as I was not really interested. I didn't delete it, but pretty much forgot all about it. Today I got my credit card bill and saw a charge from Amazon for $127.33 for Amazon Prime Membership. WTF?Quote from: Amazon Free Trial email fine printI'm not really sure how this is legal. The "Free Trial" was completely unsolicited. I did not ask for it.I went to Amazon and after logging in and some clicking around I found a "digital order" for Amazon Prime which I did not place. A little more clicking and I was able to cancel the membership and supposedly will receive a refund of $127.33I'll be checking next month's credit card bill carefully.Edit: I've been trying to remember If I might have actually requested a free trial, but I don't believe I did. I guess I'll give them the benefit of doubt though. At any rate, I apparently will receive a full refund according to an email I just got.Quote

author: PlainName
author_rank: Super Contributor
timestamp: August 02, 2018, 06:00:37 am
content: Could you have selected Prime delivery for some item without really looking at what you're clicking? That would turn it on and is easily done, but in that case I wouldn't expect the note from them to say you hadn't used any Prime benefits. (But maybe they mean you haven't used any outside the free trial).

author: rdl
author_rank: Super Contributor
timestamp: August 02, 2018, 06:16:13 am
content: I've just about convinced myself that I must have somehow signed up for it without realizing it, or did it intentionally and just don't remember. That's the only thing that makes sense.
0 logic elements in vhdl code - Page 1
Forum section: electronics / general

author: swampythe47
author_rank: Newbie
timestamp: August 02, 2018, 05:35:09 am
content: I am posting some vhdl files. Can anyone please help me and answer why am i gettting 0 logic elements??P.s.:-My code i getting compiled without any errors but its working on FPGA board(cyclone 2).Ultrasonic is my top level entity.

author: ataradov
author_rank: Super Contributor
timestamp: August 02, 2018, 05:56:02 am
content: Don't cross post. The other post -https://www.eevblog.com/forum/microcontrollers/0-logic-elements-in-vhdl-code-129647/
When you need a component now! - Page 1
Forum section: electronics / general

author: Dubbie
author_rank: Unknown
timestamp: August 01, 2018, 02:03:16 am
content: I was making a little test circuit up this afternoon and needed a certain part.Problem was I only had it in Xson6 package (1 x 1mm, 0.35mm pin pitch)I thought I'd have a go at dead bugging it. Worked a treat! Shows what you can do with a normal soldering iron and a wee bit of flux.

author: Mr.B
author_rank: Unknown
timestamp: August 01, 2018, 02:10:29 am
content: Impressive!I don't think I could keep my hand steady enough.

author: basinstreetdesign
author_rank: Frequent Contributor
timestamp: August 01, 2018, 02:16:22 am
content: And I thought I was doing crazy stuff with 0805's.

author: Dubbie
author_rank: Unknown
timestamp: August 01, 2018, 02:16:46 am
content: Kapton tape is my friend! I stuck it all together on the bench first so that a wobble of the iron wouldn't send everything flying. Also meant, if I touched a wire I had done already, it wouldn't pop off again.

author: BravoV
author_rank: Super Contributor
timestamp: August 01, 2018, 02:47:45 am
content: what great hand & vision you got there.Btw, I did similar but with bigger sized component, and I added hot glue around the soldered pins at the wires to reduce the stress at the solder joints as we move the cables when using it.Here what I mean, marked with dark blue circle where I put the hot glue surrounding the chip at the soldered wires.

author: hans
author_rank: Super Contributor
timestamp: August 01, 2018, 11:00:35 am
content: Nice work!The smallest packages I've deadbugged were 0.8mm packages (ethernet transformer). I wanted to breadboard a circuit but didn't have any adapter boards that would fit the package.Advantage: 0402 termination resistors fitted perfectly between the legs of the package. But it was real fiddly to get all wires attached.Can't imagine if the pitch shrinks even more..

author: T3sl4co1l
author_rank: Super Contributor
timestamp: August 01, 2018, 11:11:41 am
content: Quote from: hans on August 01, 2018, 11:00:35 amThat exists?I've got to imagine even if it does, the insertion loss will be ass.Tim
Cell Call Routing - International - Page 1
Forum section: electronics / general

author: rstofer
author_rank: Super Contributor
timestamp: August 02, 2018, 08:09:58 pm
content: A friend lives down the street and we both subscribe to the same cell service. I pretty much understand how this call is routed.I even think I understand how this works across multiple carriers but maybe I don't...Now, let's say my friend gets on an airplane and travels 16 time zones away (or 8 the other way...). How does the cell phone network know how to route my next call to some foreign country? Clearly, it works. What I am really wanting to find out is how the routing actually works. How does the network know where to look? Is there a single master list of the location of every cell phone in the world? Why wouldn't the provider simply say "not available" and dump the call? Not only does the router have to send the call to the right country (which might have changed a couple of minutes ago as they walked across a border) but to the right cell tower.Any links to technical answers? I searched Google and all I got was trash, mostly related to costs and services.Thanks!

author: PA0PBZ
author_rank: Super Contributor
timestamp: August 02, 2018, 08:18:23 pm
content: Your friends cellphone logs into the foreign network, and then I guess this foreign network tells the home network where the phone is - at least that is what I would do when I had to design it

author: Halcyon
author_rank: Unknown
timestamp: August 02, 2018, 08:39:38 pm
content: Some of these links might help you in understanding how mobile calls are routed:https://en.wikipedia.org/wiki/Network_switching_subsystemhttps://en.wikipedia.org/wiki/Mobility_management

author: rstofer
author_rank: Super Contributor
timestamp: August 02, 2018, 09:16:10 pm
content: Yes, those documents cover it nicely.There really is a master list! It's distributed somewhat but basically that's how it's done. The HLR (Home Location Register) tells the subsciber's home office where the client is located. Apparently this happens at every cell tower handoff - worldwide!

author: helius
author_rank: Super Contributor
timestamp: August 02, 2018, 09:21:43 pm
content: You know how your phone has an option to enable or disable "roaming"? What is roaming?It's the ability of the phone to log in to a network other than its home network. Usually this involves a different tariff schedule that can result in increased charges (if you have a post-paid account). The current location of a mobile station (phone) is being tracked all the time by the cell towers for two reasons: first, so that incoming calls can be routed to the correct cell tower/base station to reach the phone, and second, so that handoff between towers can be managed without interrupting ongoing calls.The cell handoff in the midst of a call, without interruption, may not work smoothly or at all when roaming between different networks. It only has to work when you stay within the same network and move between cell towers.
Filming storm is 'struck by lightning' but survives thanks to new mobile case - Page 1
Forum section: electronics / general

author: Zucca
author_rank: Unknown
timestamp: July 31, 2018, 02:35:39 pm
content: http://www.dailymail.co.uk/news/article-5998907/Woman-claims-iPhone-cover-saved-electrocuted-lightning.htmlWe know that lightning bolts carry from 5 kA to 200 kA and voltages vary from 40 kV to 120 kV.... I simply don't believe the cover saved her ass.

author: Richard Crowley
author_rank: Super Contributor
timestamp: July 31, 2018, 02:44:41 pm
content: Wow "news reporting" has really become a farcical joke. When I was a child, broadcasters actually had separate news departments operated by real reporters. Now, the "news" department is a branch of "entertainment". They produce sensational stories to gain viewers for the adverts. The modern term is "click-bait" but they have commercialized it.

author: Zucca
author_rank: Unknown
timestamp: July 31, 2018, 02:51:04 pm
content: From the www:QuoteThat's how she survived.

author: CJay
author_rank: Super Contributor
timestamp: July 31, 2018, 03:27:56 pm
content: Quote from: Richard Crowley on July 31, 2018, 02:44:41 pmYeah, but that article is in the Daily Fail, a nasty little rag that supported the Nazis prior to WW2 and is still as xenophobic, racist and unpleasant as it ever has been if not more.Generally regarded as a joke and, like Fox in the UK, not actually a source of news
Go-to circuit to increase push/pull current on 4mA MCU outputs - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: July 31, 2018, 02:11:10 am
content: Does anyone have a 'go to' circuit they have used to increase the output current on a 3.3V gpio while keeping it push/pull and rail to rail?This is to drive a small diode+cap charge pump, so it does need push/pull and rail to rail.A normal 20mA output has enough power to drive the charge pump directly however i'm now using an mcu with 4mA gpio.So i need to buffer this back to 20mA.BOM cost is an issue, so a couple of transistors would be better than an IC.I'm having problems figuring out a circuit that works reliability without shoot through.VCC range is 3.3V down to 2V as the device runs on a single cell.Any ideas?

author: Psi
author_rank: Super Contributor
timestamp: July 31, 2018, 02:58:47 am
content: Nevermind, found this for 4 centshttps://www.digikey.com/product-detail/en/nexperia-usa-inc/74LVC1G125GW125/1727-3488-2-ND/1023280

author: Bassman59
author_rank: Super Contributor
timestamp: July 31, 2018, 11:39:23 pm
content: Quote from: Psi on July 31, 2018, 02:58:47 amYup, exactly!
Kids Electric Car Charger Kit - Page 1
Forum section: electronics / general

author: imtiaza
author_rank: Newbie
timestamp: July 30, 2018, 11:33:08 am
content: Dear Gurus,Please see that i have purchasedIWAN 1.3 meters children's electric car four-wheel drivefrom this site,https://item.jd.com/1417359310.htmlin 2016.Today when i tried to charge the jeep it is not charging. So i tried to drill down the issue.And found that the charger kit is not working.Please see attached pictures.Now there is one Micro Controller with name JL. I am unable to see its number.I need to know from where can i buy it ?ThanksMalik Adeel Imtiaz

author: amyk
author_rank: Super Contributor
timestamp: July 30, 2018, 11:41:37 am
content: All I can tell you is that JL ishttp://www.zh-jieli.com/

author: imtiaza
author_rank: Newbie
timestamp: July 30, 2018, 11:48:38 am
content: i have already emailed them.but question is. Is it better to buy complete KIT or just replace the IC and it works.My location is in Pakistan and if i buy the chip and pay them then pay for the replacement.It will cost me high.

author: imtiaza
author_rank: Newbie
timestamp: July 30, 2018, 12:21:29 pm
content: All i can get is the below details only.JL AD1631CH4EWhat is after E is not readable.

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 30, 2018, 12:23:05 pm
content: Rebuild the whole control circuit with an Arduino.

author: imtiaza
author_rank: Newbie
timestamp: July 30, 2018, 12:42:26 pm
content: i am not expert.I only need to know is it possible if i replace this ic.secondly what is the name of ic ?

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 30, 2018, 03:23:43 pm
content: You'll have a hard time finding the firmware to load onto the chip.
Element Fire Extinguishers - Jay Leno's Garage - Page 1
Forum section: electronics / general

author: amyk
author_rank: Super Contributor
timestamp: July 28, 2018, 03:43:32 am
content: It's probably this:https://en.wikipedia.org/wiki/Condensed_aerosol_fire_suppression"It's completely safe to breathe." --- I don't think so.Amusingly enough, there is a patent (now expired) by a Chinese company which details the actual chemical:https://patents.google.com/patent/US8231801A search for "fire extinguish stick" reveals that this isn't a new product...

author: Stray Electron
author_rank: Super Contributor
timestamp: July 29, 2018, 06:14:03 pm
content: Potassium Hydroxide? Potassium Nitrate? Potassium Carbonate? No way that I'm breathing that sh it or using on anything that I care about! Not only are they corrosive but they're also hygroscopic which means that they'll continue to absorb atmospheric moisture and cause corrosion until you remove EVERY trace of them. And with that small of particles, that will be impossible.IMO there are a lot more effective fire suppression systems and ones that don't cause the problems that this one does.And did anyone notice this part? "produced from thethermal decompositionof a solid aerosol-forming compound that includes potassium nitrate as an oxidizer." So basically this is rocket fuel or black gun powder.I didn't watch the video but I can't imagine Jay using one of these on one of his super collectible cars.
[MAIN] RCD shorts out of, but two groups short? - Page 1
Forum section: electronics / general

author: onesixright
author_rank: Frequent Contributor
timestamp: July 29, 2018, 11:36:12 am
content: Hi All,Im pretty sure I'm going to mix up some terms, but stay with me :-)RCD is the earth protection and the Circuit breaker (CB) is is for each group. Right? WARNING ZERO knowledge of mains :-)Today the RCD (I would call it the main) flipped, out of nowhere. When I put it back up,twoCB flipped. TWOI could imagine that one would flip, indicating something is wrong within that group, but two? What could could be wrong at the same time in two?Anybody has a explanation for what could be the cause of that?Thanks!

author: Nusa
author_rank: Super Contributor
timestamp: July 29, 2018, 04:29:57 pm
content: It could be you just have a lot of stuff connected/plugged into those two circuits, and startup currents of all of them at once exceeded the rating of the breaker. Especially things with motors in them, like refrigerators, washing machines, or power tools?So, which circuits flipped? Were you able to successfully turn those breakers back on? What's on those circuits?

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 29, 2018, 04:36:52 pm
content: Could it be a ring main or two circuits that were accidentally connected to each other?

author: onesixright
author_rank: Frequent Contributor
timestamp: July 29, 2018, 04:40:02 pm
content: Quote from: Nusa on July 29, 2018, 04:29:57 pmAfter further investigation I found it!Its still weird. The RCD has 6 groups (3 rooms, washing, dishwasher, cooker).The RCD tripped, so all 6 groups where off. Then 2 rooms groups tripped when I reseted the RCD. These where simply 2 rooms (one with TV other with computer).Apparently the problem is in the washing machine (tested that). I guess the heater failed....What Ii don't understand is why not the washing-machine group tripped? But instead the other 2 room. Anyone??

author: onesixright
author_rank: Frequent Contributor
timestamp: July 29, 2018, 04:40:54 pm
content: Quote from: NiHaoMike on July 29, 2018, 04:36:52 pmNothing changed in the last 5 years. Its only warmAnyway, see mee reply. Found it!
Video card drivers crash  - Page 1
Forum section: electronics / general

author: nvidia
author_rank: Regular Contributor
timestamp: July 28, 2018, 04:15:59 am
content: anybody know anything i can try old pc i built from free parts worked fine for over a year but now the video driver would cash like every couple of mins so i uninstalled the drivers then went into safemode and use ddu to get rid of all the driver files and went back to windows and tried to install the newest driver for me gt 710 card but it would just say something like it could not find any compatible hardware so i had to install the driver off the cd the gpu came with and now the computer video card drivers never crash unless i play a gameanything i could try to get this to stop crashing when playing games?

author: shteii01
author_rank: Frequent Contributor
timestamp: July 28, 2018, 08:51:01 am
content: You don't say what OS you have... 2000? Xp? Vista?I usually use nVidia drivers, but, sometimes, you better off using video card maker's drivers.The other thing is that you did two extremes. You used the newest driver, one extreme, which is probably optimized toward 9xx and 10xx series cards. And you used an original driver that came on CD, this is safe option, but you know there were newer/better drivers that came afterward. You could go to the driver page (nVidia and/or card manufacturer), look through driver release notes and see at what point they started to include 7xx and 9xx cards in the driver, that is the point where they started to move away from 7xx cards toward the next generation (9xx) cards. Pick that driver or one before since it will have the last 7xx support.Another thing to keep in mind is that low end 7xx cards (710, 720, 730) were often rebadged 6xx cards. For example, I think, EVGA did that. You would pull spec on 610 and 710, and they would be identical. So run GPU-z on your 710 and see what are the specs on your card.For the record, I went from GTX 460 to GTX 750Ti SC and 750 is what I have been using for the last few years.
has youtube updated there video player? - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: July 27, 2018, 12:13:45 am
content: is it just me but when watching videos that are 4:3 or a video that was 16:9 letterbox but had the black bars cropped off before uploaded all seem to now play without them unless im in full screensamplesMissing black bars on left and rightmissing black bars on top and bottom
John Anderson and Canadian JB Peterson (both talks) - Page 1
Forum section: electronics / general

author: Cliff Matthews
author_rank: Unknown
timestamp: July 26, 2018, 02:38:41 pm
content: I'm sure it's not because he's Canadian, but IMO background JBP chatter in my shop is positive and thought-worthy -YMMVRecent:Previous:Shame that institutions like ANU offer a BA in Asian Civ. but run away from teaching the very platform they live in.. Western Civ.https://www.canberratimes.com.au/national/act/anu-pulls-out-of-new-ramsay-centre-degree-in-western-civilisation-20180601-p4zj0e.html
Dick Smith Foods is closing - Page 1
Forum section: electronics / general

author: VK3DRB
author_rank: Super Contributor
timestamp: July 26, 2018, 01:17:03 pm
content: http://www.abc.net.au/news/2018-07-26/dick-smith-blames-aldi-for-food-business-closure/10038216The end of an era... again. First it was Dick Smith Electronics. Now its Dick Smith Foods.Aussie food, eh? Dick Smith used to sell "Anzac Cookies". I never touched any of their food products since. There were complaints and eventually theirproduct was quietly removed from the shelves and replaced with "Anzac Biscuits". Some-one has stuffed up big time. The term Anzac is protected under Australian law and cannot be used in Australia without permission from the Minister for Veterans' Affairs; misuse can be legally enforced particularly for commercial purposes. There is a general exemption granted for Anzac biscuits, as long as these biscuits remain basically true to the original recipe and are both referred to and sold as Anzac biscuits and never as cookies. How could Dick Smith Foods have ever received approval to use the word "Anzac" in "Anzac Cookies?" The fines for misuse of the word "Anzac" can be severe, including 12 months imprisonment and heavy fines.https://en.wikipedia.org/wiki/Anzac_biscuitEven so, Dick Smith does have a lot of concern for where Australia is heading, especially with the unpopular Big Australia policies from our politicians. I hope he focuses on these matters and we finally get some politicians who will listen and act in Australia's interests ahead of their own interests.
DaveCAD 2.6.0 64bit cracked! pretty in pink.  - Page 1
Forum section: electronics / general

author: wilfred
author_rank: Super Contributor
timestamp: July 26, 2018, 12:46:03 am
content: It's a pity it doesn't come in fluoro lime green but my scanner can't scan lime.(*) I'm not a member of the Tuco crew. Just like their work.

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 26, 2018, 03:01:57 am
content: It's open source!https://github.com/scanlime/davecad

author: rdl
author_rank: Super Contributor
timestamp: July 26, 2018, 03:23:39 am
content: EEVblog branded custom printed sticky notes might not be a bad idea as a promotional item or even to sell.
Can you identify this connector?  - Page 1
Forum section: electronics / general

author: MrSquirrel
author_rank: Contributor
timestamp: July 25, 2018, 06:37:20 pm
content: Hi there,Can anyone identify what connector S2 might be from the footprint/outline?It's for USB on an embedded system, the middle pin is GND and either side are USB+ and USB-Standard USB connectors are obviously 4 pins so i doubt it is from that family, and suspect it's something completely different. It would only be used during development & test and not in production, hence it's not populated.Thanks,

author: Twoflower
author_rank: Frequent Contributor
timestamp: July 25, 2018, 06:42:12 pm
content: How about S for Switch? The other connectors are labeled J.

author: ruffy91
author_rank: Regular Contributor
timestamp: July 25, 2018, 06:44:29 pm
content: Looks like a right angle toggle or button switch like this

author: MrSquirrel
author_rank: Contributor
timestamp: July 25, 2018, 06:58:31 pm
content: Good call, thanks for thatYep all connectors are J - bit of poking around it's actually a reset switch.It runs to some pins on the CPU module that should be USB according to docs but i've just checked with the scope and they aren't, so it must have been customised. If you short pins 3+1, the system resets.Many thanks,

author: wraper
author_rank: Unknown
timestamp: July 25, 2018, 07:07:11 pm
content: It's a push button switch like this.
The ubiquitous IC company you probably never heard about..... - Page 1
Forum section: electronics / general

author: schmitt trigger
author_rank: Super Contributor
timestamp: July 25, 2018, 04:17:39 pm
content: Or perhaps you have.I am talking about QX Micro Devices.http://www.qxmd.com.cn/en/?index.htmlIf you have ever used or seen a solar-cell powered LED garden light, it will most likely utilize one of its ICs, QX5251/5252The datasheet only has the barest details, but the minimalist IC architecture concept is actually quite clever.
LEMO: gold connector pins for sale anywhere? - Page 1
Forum section: electronics / general

author: Kjelt
author_rank: Super Contributor
timestamp: July 24, 2018, 09:02:28 pm
content: Hi on one of my visits at an electronics "fleamarket" I came across some NOS boxes of nice Lemo connectors.The price was very interesting but I noticed that the contacts were missing. These are the golden pins that you solder the wires to. I postponed the purchase to see if I could buy these somewhere.I searched everywhere but can not find these pins for sale.Did anyone of you came across these somewhere for sale?Thanks.

author: jmelson
author_rank: Super Contributor
timestamp: July 24, 2018, 09:34:54 pm
content: Mouser in the US is the distributor for Lemo. They may not have the contacts available as a separate part #, usually the contacts come with the connector.Jon

author: helius
author_rank: Super Contributor
timestamp: July 24, 2018, 09:55:02 pm
content: Circular connectors normally have either separately installable crimp contacts, or factory installed solder contacts. (The latter may be available as hermetically sealed assemblies.)Perusing the Lemo catalog, I note that they seem to offer "crimp contacts with reduced solder cups" which is strange and contradictory (see page 130).I'll also note that designing with circular connectors involves many special accessories and tools and may not be worth it just for hobby use.

author: Dubbie
author_rank: Unknown
timestamp: July 25, 2018, 05:06:58 am
content: Yes, as rx8pilot will tell you, the tiny multipin lemos are some of the most challenging soldering jobs there are.I have done a few for various bits of equipment, and it's not something fun at all.
A Blast From the Past, a "Muzak" control switch - Page 1
Forum section: electronics / general

author: VK5RC
author_rank: Unknown
timestamp: July 21, 2018, 11:14:03 am
content: Staying at a slightly 'faded' but well located hotel the other night, I spotted this in the room and had to laugh, I haven't seen one for decades - I am old enough to remember when they were more common. It didn't work sadly.It must be sad when something becomes renown for being mediocre or even less. In Australia a non alcoholic drink "Claytons" soon became an adjective for being for 'false' or 'pretence'.https://en.wiktionary.org/wiki/Claytons

author: @rt
author_rank: Super Contributor
timestamp: July 22, 2018, 10:39:40 am
content: There’s still a timber Muzac speaker with beige cloth cover sitting where it always was, on a wall, at a local newsagent here.

author: nctnico
author_rank: Super Contributor
timestamp: July 22, 2018, 12:29:48 pm
content: I never knew it was a brand. Muzak is an official Dutch word for background music.

author: Cyberdragon
author_rank: Super Contributor
timestamp: July 22, 2018, 01:25:54 pm
content: Where is the player? (Or where would it have been)

author: VK5RC
author_rank: Unknown
timestamp: July 23, 2018, 10:51:34 am
content: I don't know but I recall some had their own dedicated phone line! Hotels etc.

author: rrinker
author_rank: Super Contributor
timestamp: July 23, 2018, 07:05:26 pm
content: A business consultant I knew through a past job was involved in the creation of a sort of competitor - basically they were FM radios with no tuning dial, it was just fixed on one station's frequency and they had an internal speaker as well as a line out to connect to the business phone or PA system - in those days, before the fancy PBX systems were common, you had a standard PA system tied to a specific phone extension (or multiples - so you could page just specific areas) and you dialed an extension which connected you to the PA input. Not as common any more as PBX and IP phones usually have an internal intercom feature for paging.

author: VK5RC
author_rank: Unknown
timestamp: July 24, 2018, 10:25:44 am
content: Thanks for that input, I was trying to explain Muzak to my 14yo daughter and it is so similar to Spotify etc but 'Muzac' got it slightly wrong - hence generating the 'bad' or mediocre reputation. Most other companies whose names became popular adjectives/verbs eg 'hoover' it up - usually have done well. At least for a while anyway.
Upton Australia - still in business? - Page 1
Forum section: electronics / general

author: VK4GHZ
author_rank: Contributor
timestamp: July 23, 2018, 01:04:03 am
content: Upton Australia's website has been returning a 403 "Forbidden" error for weeks now, and their main phone number just rings out.I can only assume they are no longer in business.Is there anyone here that passes through Bayswater that can confirm?
Looking for a decent microscope under $200 - Page 1
Forum section: electronics / general

author: adauphin
author_rank: Unknown
timestamp: July 20, 2018, 10:30:08 pm
content: Mainly as a hobby purchase, would like to let the kids use it, my daughter is fascinated with the micro world. Would also be cool to see the skin of copper wire from an audio quality standpoint.. so about 200-400x would be good.Was looking at this. I honestly have no idea where to start.https://www.celestron.com/products/lcd-digital-microscope-ii

author: rdl
author_rank: Super Contributor
timestamp: July 22, 2018, 04:08:22 pm
content: The problem I see is that it doesn't appear to have a normal eyepiece and the screen resolution is not that great. Personally I'd look for something more like a normal microscope. AmScope is one source for decent quality microscopes though you may have to pay a bit more. Also, don't get too fixated on magnification power. Just as with telescopes, more is not always better.
Home built breadboard computer - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: July 21, 2018, 03:57:25 am
content: Channel -https://www.youtube.com/channel/UC7jyKIy-dAMaD2uQP4a4U0w/videos

author: KE5FX
author_rank: Super Contributor
timestamp: July 21, 2018, 07:15:16 am
content: Meth is a hell of a drug...

author: rdl
author_rank: Super Contributor
timestamp: July 21, 2018, 07:10:44 pm
content: Wow. That takes "rat's nest" to a whole new level.

author: Wh1sper
author_rank: Regular Contributor
timestamp: July 21, 2018, 07:36:44 pm
content: Don't believe it, fake news!

author: VinzC
author_rank: Frequent Contributor
timestamp: July 22, 2018, 01:06:32 pm
content: Quote from: Wh1sper on July 21, 2018, 07:36:44 pmUh? why's that?A youtuber named Ben Eater has successfully built a small computer on breadboards. Far less messy but it is plausible. This guy doesn't *show* any hint nor details on what "sound" or "graphics" are in his own design... apart from the schematics, which are available on GitHub. Did you check them?

author: Wh1sper
author_rank: Regular Contributor
timestamp: July 22, 2018, 01:31:11 pm
content: My assessment is based on my gut feeling. I just can't imagine a reliably functioning circuit on a breadboard that is so complex. It's not only the many connectors, but also the high frequencies, it must be teeming with spikes.I just skimmed the video, it doesn't seem to be 100% sure that the things shown are really from Breadboard.Edit: Just for a binary counter shown there is needed a far lee components :-)

author: VinzC
author_rank: Frequent Contributor
timestamp: July 22, 2018, 01:40:36 pm
content: If the frequency can be inferred from the video, it definitely does not qualify for "high" frequency(ies). Given the speed the LEDs change, it's barely in the kilohertz range (and I feel generous). So with that in mind *and* the fact that "graphics" is only a bunch of LEDs, it's quite plausible to find a working breadboard messy computer like this one...

author: Wh1sper
author_rank: Regular Contributor
timestamp: July 22, 2018, 01:42:39 pm
content: Anyway I am with you it is an impressive work.About the sense we don't speak

author: Kleinstein
author_rank: Super Contributor
timestamp: July 22, 2018, 03:32:36 pm
content: From the few parts one can actually recognize, the breadboards look rather empty, with only very few parts.The other strange point is the so called programming mode. The switches are buried so much to being not usable.Having a fake counter is easy.How complicated a self made CPU is, depends on the parts used: a system with microcode from an EEPROM and a few more higher integration parts, it sounds plausible. The actual CPU might be only a small part - maybe an µC simulating one.
New toy for soldering small parts. - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: July 22, 2018, 10:56:06 pm
content: I got this thing recently. Its an Optetec magnifier. It comes with a table that slides around so you can mount parts to it then press a button and lock them in place. As you can see it magnifies the resistors to about 18" wide so the smallest surface mount parts are visible I also didn't know those little parts had writing on them. You can also make it black and white or other high contrast modes for seeing things that are normally invisible.It costs a few grand. How does this compare to other devices made specifically for electronics? This seems better but I haven't played with many. You can also send the signal to a camera or a bigger HDMI screen for more detail.
Why are my post not posting? - Page 1
Forum section: electronics / general

author: BenKomisar11
author_rank: Newbie
timestamp: July 21, 2018, 03:32:18 pm
content: Hello All,I am new to the forum and happy to be here.I am a little confused though, why are my posts posted in the main "projects and technical stuff" not appearing on the forum?I did a post last night and I thought it was a glitch so I reposted today and I see again it is not appearing?Is it that a moderator has to look at the post before it is approved?I an EEVblog newbie so I hope to be able to learn how it functions here at this fine forum.Thanks everyone,Respect,Regards,Ben

author: ataradov
author_rank: Super Contributor
timestamp: July 21, 2018, 05:03:09 pm
content: Are there any errors show up or something like this? As far as I know there are no pre-moderation of filtering features here.

author: Ian.M
author_rank: Super Contributor
timestamp: July 21, 2018, 06:04:16 pm
content: If you are posting from a shared PC that's used by another EEVblog member, I would suggest contacting the admin team as they are very tough on enforcing the one account per user policy. They are also tough on spam, but that shouldn't have affected a student EE's usual type of posts.
Fancy a New Car Dave? (Ferris Bueller content) - Page 1
Forum section: electronics / general

author: Zad
author_rank: Super Contributor
timestamp: July 21, 2018, 02:19:46 am
content: Meter sales doing well?One of the cars used to film Ferris Bueller will be up for auction at this August's Monterey sale.https://www.mecum.com/lots/CA0818-336645/1985-modena-gt-spyder-california/"1985 Modena GT Spyder California Featured in Ferris Bueller's Day Off"Sadly no estimate is given. I imagine it will be "quite a lot". Despite it being a custom built car, and not actually a Ferrari.
Tesla model 3 teardown - Page 1
Forum section: electronics / general

author: Fungus
author_rank: Super Contributor
timestamp: July 17, 2018, 02:20:38 pm
content: It's a "symphony of engineering".Short video, not a lot of detail but some nice PCBs in the middle.Also interesting: The batteries are 20% bigger than the venerable 18650 but have a new chemistry and hold 50% more charge.

author: D3f1ant
author_rank: Frequent Contributor
timestamp: July 20, 2018, 08:13:05 pm
content: My OCD hates that big chips doesn't quite line up, and why is there an Electrolytic missing on one of those sections...tesla quality control?

author: Nusa
author_rank: Super Contributor
timestamp: July 20, 2018, 08:31:22 pm
content: The missing cap is more likely physical damage by the disassembler, either during removal or later handling. You can see one of the pcb pads appears to be ripped off the board, and the other clearly used to be attached to something.