hybridfree/eevblog-posts huggingface dataset:
What to buy - Page 1
Forum section: electronics / general

author: Kaluriel
author_rank: Contributor
timestamp: June 10, 2013, 04:08:14 pm
content: I've got a five year bonus coming up soon, and I was going to put it towards an oscilloscope, but I got impatient when I got the chance to get a Rigol DS1052E.So what other neat things would you recommend I get for £500-750?

author: KJDS
author_rank: Super Contributor
timestamp: June 10, 2013, 04:23:44 pm
content: What are your interests? RF, audio, digital, motor control?No point recommending a logic analyzer to someone that wants to design a RF power amp, or a spectrum analyzer to someone that wants to play with stepper motors.

author: Kaluriel
author_rank: Contributor
timestamp: June 10, 2013, 10:50:12 pm
content: I just meant generally, doesn't have to be ee based

author: lemmegraphdat
author_rank: Frequent Contributor
timestamp: June 10, 2013, 10:58:55 pm
content: Quote from: Kaluriel on June 10, 2013, 04:08:14 pmStick it in a box somewhere and act like you don't have it.

author: Kaluriel
author_rank: Contributor
timestamp: June 10, 2013, 11:29:18 pm
content: unfortunately I don't get given it. i can only choose what i want to buy

author: nanofrog
author_rank: Super Contributor
timestamp: June 11, 2013, 12:01:53 am
content: Quote from: Kaluriel on June 10, 2013, 11:29:18 pmCould you narrow down your interests then?I assume that since it's a PO amount or similar (no cash, just an authorization for max purchase amount), there may be restrictions as to what it can/can't be used for.

author: peterthenovice
author_rank: Regular Contributor
timestamp: June 11, 2013, 01:00:39 am
content: you should by an airplane ticket to go see Dave.

author: lemmegraphdat
author_rank: Frequent Contributor
timestamp: June 11, 2013, 02:02:14 am
content: Quote from: Kaluriel on June 10, 2013, 11:29:18 pmSilver Eagles if you can get them. Stick them in a box.

author: KJDS
author_rank: Super Contributor
timestamp: June 11, 2013, 07:33:07 am
content: Outside of ee, get along to Dunsfold this coming weekend where the film Top Gear and grab a ride in a supercar atwww.thesupercarevent.com

author: chibiace
author_rank: Regular Contributor
timestamp: June 11, 2013, 03:19:33 pm
content: how much is this bonus?

author: Wytnucls
author_rank: Super Contributor
timestamp: June 11, 2013, 03:26:35 pm
content: Get a Rigol function gen, always useful.

author: kerrinal
author_rank: Contributor
timestamp: June 19, 2013, 07:26:35 am
content: I just find the rigol 1052E. Frankly,I suggest you to purchase another brand ,siglent.http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270851051021&ssPageName=STRK:MESE:IT#ht_6665wt_1037

author: Kaluriel
author_rank: Contributor
timestamp: June 19, 2013, 01:36:26 pm
content: Quote from: Wytnucls on June 11, 2013, 03:26:35 pmFunction generator sounds like a good idea

author: peter.mitchell
author_rank: Super Contributor
timestamp: June 19, 2013, 02:49:31 pm
content: I'd say a fistfull of connectors, banana, aligator, mini grabbers and some very nice silicone wire. That or premade leads, I find them incredibly useful, more useful than one would expect.
Cleaning old instrument - Page 1
Forum section: electronics / general

author: jantb
author_rank: Newbie
timestamp: June 18, 2013, 03:18:35 pm
content: HiLast year my father died and left me a lot of instruments,components etc.Among the instruments there was a Textronic 2225 oscilliscope.Seems to be working ok but its clear,it have seen some heavy duty in unfreindly territory.Its dirty,grimy,oilfingers..What can I use to clean the outside,specially the front,knobs,bottums...Jan

author: SeanB
author_rank: Super Contributor
timestamp: June 18, 2013, 03:36:20 pm
content: Many things, but for the case use baby wipes, soft and gentle non alcohol based wipes work best at cleaning off the grime and grease. Careful around the knobs and screen, as the plastics there are both soft and the screen printed lettering is delicate. A damp lint free cloth works well.

author: lemmegraphdat
author_rank: Frequent Contributor
timestamp: June 18, 2013, 10:44:38 pm
content: If it was my dad's I would not do a thing to it.

author: Unknown
author_rank: Unknown
timestamp: June 18, 2013, 11:23:37 pm
content: Quote from: lemmegraphdat on June 18, 2013, 10:44:38 pm+1

author: kerrinal
author_rank: Contributor
timestamp: June 19, 2013, 07:28:51 am
content: Just keep it.Do nothing.after all,it is your fathers oscilloscope and your memory of your father.

author: jamesb
author_rank: Regular Contributor
timestamp: June 19, 2013, 12:18:41 pm
content: While I agree that there may be sentimental value to the instrument itself, I find it hard to agree that there is any sentimental value in grime.I personally would start with some warm water with a little bit of soap. Depending on the condition of the plastic, etc. you could scale the treatment up to something like spec. grade isopropyl-alcohol - just be sure to test it on an inconspicuous location first! And whatever you do, do NOT try acetone / nail polish remover unless you are willing to live with a marred finish.Always start gentle, then work progressively more aggressive when cleaning. Test patches are highly under-rated also!For any contacts - esp. gold plated ones, I've had some success with using spec grade IPA wetted writing paper (blank). The paper is very mildly abrasive and the IPA helps to remove any debris and does not leave any residue (hence using the decidedly more expensive spec. grade variety).

author: jantb
author_rank: Newbie
timestamp: June 19, 2013, 12:29:29 pm
content: HiThanks for your answers.I will try with a mild soap first,stepping up the soap if needed,a last resort could be VINYLCLEANER for cars.And offcourse I will clean it,cleaned or not it will always remind me of my father.I intend to use it and have no nostalgia about this,its just a thing !Jan
Itead now does Flex boards ! - Page 1
Forum section: electronics / general

author: free_electron
author_rank: Super Contributor
timestamp: May 15, 2013, 04:44:20 pm
content: I just found out Itead now also offers flex pcb's ! up to 10x10.now we're cooking with fire !

author: krivx
author_rank: Frequent Contributor
timestamp: May 15, 2013, 04:54:31 pm
content: Anyone have pricing info?edit:whoops, it's online alreadyhttp://imall.iteadstudio.com/open-pcb/pcb-prototyping.html

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 15, 2013, 04:55:36 pm
content: http://imall.iteadstudio.com/open-pcb/pcb-prototyping.htmlNot clear if they cut the outline - not a huge deal to do yourself with flex though

author: tom66
author_rank: Super Contributor
timestamp: May 15, 2013, 04:57:23 pm
content: About $65~$80, it's $65 for 5cm x 5cm, and $80 for 10cm x 10cm.http://imall.iteadstudio.com/open-pcb/pcb-prototyping.htmlWould be interesting to see some results from these, if they are any good or not.

author: chicken
author_rank: Frequent Contributor
timestamp: June 18, 2013, 06:17:25 pm
content: Bump! Did anyone try this service by now?

author: Daniyal
author_rank: Contributor
timestamp: June 20, 2013, 02:40:14 pm
content: humm, this looks interesting.
They have the cheek to charge postage as well - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: June 12, 2013, 10:46:26 am
content: I found this on ebay today. An LM2577 DC to DC boost with a price tag of £200,000.00 and they then have the bare faced cheek to ask for eighty pence postage. I wonder if I clicked the buy now button would pay pal try to carry out the transaction, I know my bank would have more than a few rude words to say to me.http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=130926346159&category=58288&ssPageName=ADME:B:SEMK:UK:SHOWI&emailtemplateid=59804936&sellerid=WRtiY6Y8u+pc8ruL7CNBTg==&buyerid=L6rwn9EkeWvrRyFQkwwp6A==&refid=store

author: GeoffS
author_rank: Unknown
timestamp: June 12, 2013, 10:50:08 am
content: Perhaps they'll give a discount for quantity?

author: digsys
author_rank: Unknown
timestamp: June 12, 2013, 11:37:21 am
content: I hear they do that so as not to pay for re-listing. When they get more stock, they just fix the right price again.Just imagine if someone was dumb enough (maybe a government department?) to buy one at that price :-)

author: mariush
author_rank: Super Contributor
timestamp: June 12, 2013, 02:32:38 pm
content: Like digsys says, it's a common practice to raise the price when they no longer have stock instead of canceling the listing.

author: Unknown
author_rank: Unknown
timestamp: June 12, 2013, 02:37:43 pm
content: Wow, that explains why I found a $100 74HC138 a while ago.

author: madires
author_rank: Super Contributor
timestamp: June 12, 2013, 02:40:21 pm
content: Quote from: mariush on June 12, 2013, 02:32:38 pmInteresting! Over here it's illegal to offer something you can't deliver.

author: Excavatoree
author_rank: Frequent Contributor
timestamp: June 12, 2013, 02:51:17 pm
content: Quote from: madires on June 12, 2013, 02:40:21 pmI'll bet if anyone paid that much, they'd be able to quickly buy one and deliver it to meet the requirement.

author: Mechatrommer
author_rank: Super Contributor
timestamp: June 12, 2013, 03:36:27 pm
content: oo i've seen this somewhere before. with that price, one can easily make illegal thing legal, and legal thing illegal. you pay me that i deliver you 1 unit as promised + 10 unit free. buy 1 free 10, must be too good to be true.

author: G7PSK
author_rank: Super Contributor
timestamp: June 12, 2013, 05:16:08 pm
content: At that price I would expect several containers full of them at the very least.

author: peter.mitchell
author_rank: Super Contributor
timestamp: June 16, 2013, 03:05:00 pm
content: at the price, they have a monk with the module on a little silk pillow with tassels inside a glass case flow to your door.

author: kerrinal
author_rank: Contributor
timestamp: June 19, 2013, 07:36:26 am
content: None sells record.I would not buy it .
Is it just me or do I spy... - Page 1
Forum section: electronics / general

author: envisionelec
author_rank: Frequent Contributor
timestamp: June 21, 2013, 12:15:26 pm
content: Phosphorous on the user avatar appears to be spelt Phospherous?

author: digsys
author_rank: Unknown
timestamp: June 21, 2013, 12:41:32 pm
content: Quote from: envisionelecIt's been my icon since I started and never noticed. My spelling is phospherus ! Maybe it's the ancient spelling ?

author: dfmischler
author_rank: Frequent Contributor
timestamp: June 21, 2013, 01:10:10 pm
content: I think the ancient spelling would be something like?? - but phosphorous wasnot discovered by the ancients.EDIT: That's funny, the Greek characters looked OK in the preview... How can I make it work?

author: nitro2k01
author_rank: Frequent Contributor
timestamp: June 21, 2013, 01:31:23 pm
content: Test:??(Failed. The forum software or database probably isn't configured correctly to be able to store extended characters.)Test 2: Î¦Ï?Ï?Ï?Ï?ÏÎ¿Ï?Attached below, a fixed version of the graphic. And btw, those graphics are kind of horrible in several ways, for example how the letter spacing seems to be quantized to 1 pixel intervals, so some letters are too close too each other.

author: Stonent
author_rank: Super Contributor
timestamp: June 21, 2013, 08:41:28 pm
content: Yeah what's the deal with the element avatars? I've only ever seen them here.

author: kizzap
author_rank: Unknown
timestamp: June 22, 2013, 02:22:36 am
content: The element avatars are better then the "celebrity" alternatives.-kizzap

author: Fsck
author_rank: Super Contributor
timestamp: June 22, 2013, 02:30:38 am
content: Quote from: Stonent on June 21, 2013, 08:41:28 pmsame, but they're neat.

author: c4757p
author_rank: Super Contributor
timestamp: June 22, 2013, 02:51:02 am
content: Holy crap, it's a mass gathering of elements! Come on everybody, let's get a periodic table in here!Or... maybe it's best we don't just mix all these chemicals willy-nilly...

author: c4757p
author_rank: Super Contributor
timestamp: June 22, 2013, 02:56:19 am
content: Quote from: dfmischler on June 21, 2013, 01:10:10 pm

author: digsys
author_rank: Unknown
timestamp: June 22, 2013, 11:27:40 am
content: Quote from: c4757pDid you just insult my grandfather?
Our Bright future! - Page 1
Forum section: electronics / general

author: warp_foo
author_rank: Unknown
timestamp: June 14, 2013, 05:16:31 am
content: Our bright future!The 'Bell Boy' is especially cute...m

author: digsys
author_rank: Unknown
timestamp: June 14, 2013, 05:56:19 am
content: I didn't get it

author: Unknown
author_rank: Unknown
timestamp: June 14, 2013, 07:25:30 am
content: Warp foo nice work!science theater 3k classic

author: jantb
author_rank: Newbie
timestamp: June 15, 2013, 07:02:09 pm
content: The future so bright..you got to ware shades!

author: smashedProton
author_rank: Frequent Contributor
timestamp: June 15, 2013, 09:39:54 pm
content: I live there! The pacific science center is a beautiful place!

author: branadic
author_rank: Super Contributor
timestamp: June 15, 2013, 10:08:10 pm
content: Quote from: digsys on June 14, 2013, 05:56:19 amNo wonder, this is a strange understanding of humor.

author: c4757p
author_rank: Super Contributor
timestamp: June 15, 2013, 10:40:19 pm
content: Quote from: digsys on June 14, 2013, 05:56:19 amDon't worry, I'm still trying to figure it out.

author: ron
author_rank: Regular Contributor
timestamp: June 15, 2013, 11:18:31 pm
content: Maybe this post should be in the Supporter Lounge.
Portable USB Charger / Chinese Junk - Page 1
Forum section: electronics / general

author: dexters_lab
author_rank: Unknown
timestamp: June 11, 2013, 09:39:23 pm
content: Tonight i have been taking a quick look at a cheap portable usb charger, it's styled around a 18650 liion battery in an aluminium tube, it's supposed to deliver 1A @5v (USB). Micro USB input for charging and a standard USB for output.well surprise surprise, it didn't, at 1A it was down to 3.69v, at 0.5A it is acceptable at 4.9v, so why dont they list the spec as 5v @ 500mA max in the first place?This unit in question was under £4 from .hk (yea i know you get what you pay for!), i might get a few others and see if they perform differently to each other...pics and chart attached...

author: Len
author_rank: Frequent Contributor
timestamp: June 11, 2013, 09:45:53 pm
content: Quote from: dexters_lab on June 11, 2013, 09:39:23 pmThat's actually not too bad, compared to this one:

author: dexters_lab
author_rank: Unknown
timestamp: June 11, 2013, 09:58:42 pm
content: lol yea have seen mikes videos, tbh i have a mains/plugin one at work i really want to take apart and see the internals... it keeps tripping our RCD (GFI)least this battery one wont set your house on fire.... hmm well maybe... eyes up that liion cell

author: tom66
author_rank: Super Contributor
timestamp: June 11, 2013, 10:14:39 pm
content: I am at a loss how an ac adapter with an ISOD (non-earth) can cause an RCD to trip, unless somehow the high frequency interference put out by these pieces of junk can cause a false trip.

author: mariush
author_rank: Super Contributor
timestamp: June 11, 2013, 10:16:15 pm
content: It's probably rated for 1A so that it could charge iPads and other stuff that refuses to charge at 0.5a

author: dexters_lab
author_rank: Unknown
timestamp: June 11, 2013, 10:33:52 pm
content: Quote from: tom66 on June 11, 2013, 10:14:39 pmIts a wall wart with a metal earth pin (its a uk style plug), will post pics when i take a look at it. It looks proper nasty even from the outside

author: justanothercanuck
author_rank: Frequent Contributor
timestamp: June 12, 2013, 03:10:25 pm
content: I bought a USB hub recently and it was the same thing... 1a power brick, couldn't output more than 500ma reliably.I wound up finding another power brick and splicing the bad bricks connector onto the end.edit: oh jeez. I just realized it's the same board as Mike's, except they used a yellow transformer, and the cap below it is bent down instead of standing up.

author: amyk
author_rank: Super Contributor
timestamp: June 13, 2013, 11:33:23 am
content: If I'm reading the part# right the "E5 0B" is a5.0V 800mA LDOso 1A rating is ridiculous. It seems the circuit is just a free-running boost converter with an LDO post-regulator? The 18650 can definitely do >1A though.

author: dexters_lab
author_rank: Unknown
timestamp: June 15, 2013, 09:36:08 pm
content: Just gone back to the ebay listing and it says: Output : 5.0±0.25V/1.0Ahttp://pages.ebay.com/link/?nav=item.view&id=111083899272
MUST READ: Linear on Murphy's Law - Page 1
Forum section: electronics / general

author: Wartex
author_rank: Frequent Contributor
timestamp: June 12, 2013, 10:58:24 pm
content: http://michaelwieckowski.com/wp-content/uploads/2013/06/Murphy.pdfBonus:http://desperate-engineers.com/files/2010/08/NS_polish_amplifier.pdf

author: madworm
author_rank: Frequent Contributor
timestamp: June 12, 2013, 11:16:13 pm
content: "Voltage Fouler"

author: Unknown
author_rank: Unknown
timestamp: June 14, 2013, 07:13:29 am
content: I am so printing this! Inferno Output Current Loop MAUHAHAHA!

author: free_electron
author_rank: Super Contributor
timestamp: June 14, 2013, 01:45:43 pm
content: Ah, good ol LM0901A1411090451C. I made many circuits with that thing. All worked perfectly fine. Then again, i am from Belgium...

author: AlfBaz
author_rank: Super Contributor
timestamp: June 14, 2013, 04:45:50 pm
content: Thank you Wartex, great laugh

author: c4757p
author_rank: Super Contributor
timestamp: June 14, 2013, 04:50:01 pm
content: The Murphy's one is a classic - I love it. But I hadn't seen the LM0901A1411090451C before - that's just great. "Typical low noise - 30Vrms"

author: peterthenovice
author_rank: Regular Contributor
timestamp: June 14, 2013, 06:34:30 pm
content: input bias current 200 amps
Hostgator sucks - Page 1
Forum section: electronics / general

author: Baliszoft
author_rank: Frequent Contributor
timestamp: June 14, 2013, 02:03:24 pm
content: I just got my next invoice from hostgator (for hosting my website(s)). Since i (my company) is located in the EU, they added the extra VAT (which is +27% for my country). This is the first time (in the past seven years) they want me to pay VAT. Ok, i went to their website to check the FAQ what is going on, and they say there if you provide your registered VAT #, you dont have to pay VAT (as it is the way to do it). I filled up the VAT section in my account settings and opened a chat, to ask them to cancel the old invoice and issue a new one with my verified VAT # on it, but without the extra +27% fee.They did not get it at all. The guy said that they have to follow the regulations. Was i asking for something which would be against the current regulations? They can(may)not cancel already issued invoices?!?!? Ridiculous!

author: Bored@Work
author_rank: Super Contributor
timestamp: June 14, 2013, 05:11:23 pm
content: Wait, if you are a business and paid VAT for the hosting of a business website you should be able to reclaim the VAT from your government. Something you should actually know if you are a business. Annoying, but that's it.If you, however, paid for the hosting of a non-business website or if you don't even happen to be a business, then you in fact dodged taxes in the past, and I wouldn't announce that to the world.

author: Baliszoft
author_rank: Frequent Contributor
timestamp: June 14, 2013, 05:59:37 pm
content: If you are trading inside EU (but with a different country) AND you have got a registered EU VAT number (this can only be obtained by companies), you do not have to pay VAT at all (in that other EU country).QuoteI have provided them all the info, still they do not want to issue me a new invoice without the VAT.I do business with lots of companies without paying VAT at all. F.eg : Farnell, Mouser, ....

author: Baliszoft
author_rank: Frequent Contributor
timestamp: June 14, 2013, 06:17:39 pm
content: QuoteI have double checked my mail. I did not get any notifications from Hostgator, that they are about to charge European VAT for me (being an US company) so i have to fill in my EU VAT #. I saw this today only AFTER receiving an invoice from them with EU VAT on it.Unfair. And if a company makes unfair steps, it is better to leave them!
Programmable Magnets That Changes Polarity And Strength. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: June 12, 2013, 11:05:09 pm
content: Quotehttp://techcrunch.com/2013/06/12/austin-based-cmr-demos-programmable-magnets-that-changes-polarity-and-strength-on-a-whim/Alexander.

author: tom66
author_rank: Super Contributor
timestamp: June 12, 2013, 11:20:52 pm
content: If only someone could invent a magnet which could swap states with a bipolar pulse, requiring only a small amount of energy each time. Then every perpetual motion machine I have ever conceived of would work. Obviously, this would involve a considerable part of the field of physics being wrong, which is highly unlikely.

author: dfmischler
author_rank: Frequent Contributor
timestamp: June 12, 2013, 11:51:41 pm
content: Quote from: tom66 on June 12, 2013, 11:20:52 pmIsn't this exactly howcore memoryworked (well, depending on what you mean by a small amount of energy)?

author: lemmegraphdat
author_rank: Frequent Contributor
timestamp: June 13, 2013, 12:22:35 am
content: How much energy is used to overcome friction in the EV?

author: smashedProton
author_rank: Frequent Contributor
timestamp: June 14, 2013, 04:19:34 am
content: It isnt really "programmable" it just spot-magnetization. But that doesn't sound nearly as good as programmable on paper.

author: Unknown
author_rank: Unknown
timestamp: June 14, 2013, 06:54:06 am
content: yea it does sound better on paper.. however the article says "breakthough" ?? i thought that was old news
Nixie tube clocks - Page 1
Forum section: electronics / general

author: iloveelectronics
author_rank: Frequent Contributor
timestamp: June 12, 2013, 06:56:26 am
content: Just wanted to share a couple of nixie tube clocks I bought recently. These tubes are really beautiful to look at! The thought that one day they will be extinct is just saddening. Does anyone still manufacture these tubes?

author: N2IXK
author_rank: Frequent Contributor
timestamp: June 12, 2013, 03:34:59 pm
content: AFAIK, nobody is making nixie tubes anymore.There is a huge supply of USSR surplus tubes available, though. These are what is ending up in most new nixie clock kits today.

author: Unknown
author_rank: Unknown
timestamp: June 12, 2013, 03:51:25 pm
content: It sadden me to , I at some stage want to get a nixie tube frequency counter, I always feel sad when I look into my tube Radio amateur transceiver, as I will probably be the last Radio Amateur to look after this wonder Kenwood radio, my daughter who is keen on Ham Radio is more interested in my modern equipment.

author: N2IXK
author_rank: Frequent Contributor
timestamp: June 12, 2013, 04:19:01 pm
content: It seems kind of ironic that building clocks is the "killer app" for these devices nowadays.Back when nixies were in common use, they (and the electronics needed to drive them) were FAR too expensive to be widely used in applications like clocks, with the exception of stuff like rackmount master timing clocks for NASA facilities and the like.By the time that digital electronics started to get cheap enough, numeric display technology had moved on to LEDs and VFDs.Nixie clocks are cool (I've put a couple together), but I think CRT based "scope clocks" have them beat for retro geek appeal:http://www.cathodecorner.com/scra/index.htmlhttp://www.tubeclockdb.com/scope-crt-clocks.html

author: manticore00
author_rank: Regular Contributor
timestamp: June 12, 2013, 04:37:01 pm
content: Systron Donner made a few Nixie counters and you can find them on ebay still. I recently picked up a 6150 and a 6052. Both look awesome and work well.

author: N2IXK
author_rank: Frequent Contributor
timestamp: June 12, 2013, 04:54:57 pm
content: The HP 5245L was probably the most common nixie tube frequency counter. Still all over eBay and local hamfests. They must have sold a LOT of them over the years.

author: retiredcaps
author_rank: Super Contributor
timestamp: June 13, 2013, 05:06:50 am
content: Quote from: iloveelectronics on June 12, 2013, 06:56:26 amGet a nixie tube multimeter.http://mrmodemhead.com/blog/nixie-glow/
EEVBlog suggestion - Measure voltage of hobby motory with cheap VM - Page 1
Forum section: electronics / general

author: scott216
author_rank: Regular Contributor
timestamp: June 13, 2013, 08:45:47 pm
content: I have an idea for EEV blog. I know how much Dave likes talking about multimeters. I was measuring the voltage of a little RE-280 hobby motorlike this onehooked up to 2 AA batteries. I used my Extech MN35, and the voltage was all over the place, and reading way to high - into the double digits. I then tried my Fluke 117 and it read the voltage properly. I'd like to see a EEV blog explaining what's happening and if there is a way to tell from the meter's specs how the meter will perform in this scenario.

author: DavidDLC
author_rank: Frequent Contributor
timestamp: June 13, 2013, 08:47:45 pm
content: I had the same issue with an new model Agilent multimeter and a motor, I did the same measurements with a Fluke and a old B&K multimeter with no fluctuation.David.
Forum 'recent posts' - more results per page? - Page 1
Forum section: electronics / general

author: madworm
author_rank: Frequent Contributor
timestamp: June 09, 2013, 11:14:10 am
content: Is there a way to have more (much more) results per page for the 'recent posts'?Having to click through 10s of pages is pissing me off.I'd rather have all of them (or at least 100) on a single page, so I can skim over them quickly.

author: GeoffS
author_rank: Unknown
timestamp: June 09, 2013, 11:20:54 am
content: Try the Look and Layout option in your profile.Limit is 50 posts though.

author: madworm
author_rank: Frequent Contributor
timestamp: June 12, 2013, 05:45:25 pm
content: Thanks, that helps a bit.
Another one bites the dust... - Page 1
Forum section: electronics / general

author: warp_foo
author_rank: Unknown
timestamp: June 11, 2013, 02:18:14 am
content: Looks like HP is killing OpenVMS.http://www.theregister.co.uk/2013/06/10/openvms_death_notice/In a few more years, all of that great hardware I learned on, and the software to run will be gone. Although, to be honest, I'm surprised HP kept it around this long.Looks like I'll have to find my install media and dust off my old Alpha...m

author: justanothercanuck
author_rank: Frequent Contributor
timestamp: June 11, 2013, 02:42:39 am
content: I can't say I'm sad to see it go, myself... We had an Alpha at work, and coincidentally I was the one to kill the server by trying to do the weekly backup on it... RAID array failed, it crashed, I rebooted it and it kept crashing on boot. I guess it didn't help that it was 10 years past EOL... Its menus were crap, and the error messages and job control were terrible. IMO, of course.eg: "tape full, reply to job 123 with continue"... you go into the menus and the only options are "abort", "restart", and "none". who would have guessed "none" meant "continue"?

author: dfmischler
author_rank: Frequent Contributor
timestamp: June 11, 2013, 07:35:27 pm
content: I wouldn't worry too much if you just want to play. You can still get RSX-11M/M+ boot images and documentation just by downloading 'em and they run on the PDP-11 simulators faster than they ever did on the real iron. I'm sure it will wind up the same on the VAX and Alpha. I ran all these systems from the early 80's to mid 90's.The real question is what is it good for? Since Windows/Linux/BSD have moved on to 64-bit address spaces and there's no end in sight to memory capacity why would you want to run VMS unless you have millions of dollars worth of legacy software that can't be economically ported to another platform?

author: warp_foo
author_rank: Unknown
timestamp: June 12, 2013, 02:14:21 am
content: Quote from: wilfred on June 11, 2013, 03:24:12 amI'll have to re-register at DECUS myself. I have media somewhere, but I don't recall what version.

author: tom66
author_rank: Super Contributor
timestamp: June 12, 2013, 08:29:01 am
content: The bank my mum works for (Barclays) still uses VMS, running late 80's to early 90's management software.
bus pirate knock off? - Page 1
Forum section: electronics / general

author: peterthenovice
author_rank: Regular Contributor
timestamp: June 12, 2013, 03:45:27 am
content: I found this from sandbox electronicshttp://sandboxelectronics.com/store/index.php?main_page=product_info&cPath=65&products_id=185&zenid=umq441p3nsth9qukbt9k5np257

author: FrankBuss
author_rank: Unknown
timestamp: June 12, 2013, 05:04:43 am
content: Looks like Dangerous Prototypes released the schematic and the firmware under the CC-0 licence, so should be no problem.

author: Jon Chandler
author_rank: Frequent Contributor
timestamp: June 12, 2013, 05:36:24 am
content: SparkFun's version of the Bus Pirate is also a knockoff of Dangerous Prototypes.

author: rolycat
author_rank: Super Contributor
timestamp: June 12, 2013, 06:27:18 am
content: Quote from: peterthenovice on June 12, 2013, 03:45:27 amThese are good quality units - I bought one a year or two ago after noticing that Dangerous Prototypes give them kudos:http://dangerousprototypes.com/2011/08/18/sandbox-electronics-pays-royalty-for-third-party-bus-pirate-sales/
Google Glass teardown - Page 1
Forum section: electronics / general

author: Hypernova
author_rank: Unknown
timestamp: June 12, 2013, 04:09:51 am
content: http://www.catwig.com/google-glass-teardown/Guys at Sparkfun knew people who were getting one so offered to pay the cost in return for them tear it up.There's also an article in IEEE Spectrum recently on another guy that's been working on these things for a long time:http://spectrum.ieee.org/geek-life/profiles/steve-mann-my-augmediated-lifeHe raises a very good point that the way Glass does the camera the parallax and focusing is going to mess up your vision if you wear it too long. The way he's done it is much better.

author: ataradov
author_rank: Super Contributor
timestamp: June 12, 2013, 04:35:48 am
content: As of right now Google Glass does not project image from the camera back, there is no fake transparency and cool overlaying information, so no problems with the eyes.

author: ataradov
author_rank: Super Contributor
timestamp: June 12, 2013, 04:37:22 am
content: And right now they don't show too much compelling information to stare on the screen for hours.
Why are my smilies broken - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: June 09, 2013, 01:45:48 pm
content: For some reason when I put a smiley on the forum it comes up as script when I drag it onto the page and stays as script in the posting, any ony have an idea as to what is going on, I use Chrome and have checked in the setting for anything that might be at fault but cannot see anything.https://www.eevblog.com/forum/Smileys/default/bangheadonwall.gif

author: c4757p
author_rank: Super Contributor
timestamp: June 09, 2013, 01:57:37 pm
content: Click, don't drag.

author: G7PSK
author_rank: Super Contributor
timestamp: June 09, 2013, 02:04:14 pm
content: Ok I will try that.Thanks that works I dont know why I started to drag them its just got to be a habbit.

author: SeanB
author_rank: Super Contributor
timestamp: June 09, 2013, 02:16:19 pm
content: I had the same trouble with video, learnt that I need to use the link with ?watch = xyz123 to use them properly, otherwise they just got converted to a link.

author: JuKu
author_rank: Frequent Contributor
timestamp: June 11, 2013, 02:31:58 pm
content: Quote from: G7PSK on June 09, 2013, 01:45:48 pmBecause you're not funny.

author: c4757p
author_rank: Super Contributor
timestamp: June 11, 2013, 03:23:38 pm
content: Quote from: JuKu on June 11, 2013, 02:31:58 pmOh... I get it! Hmm...https://www.eevblog.com/forum/Smileys/default/smiley.gifYep! Good, I'm funny.https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gifWait...

author: vk6zgo
author_rank: Super Contributor
timestamp: June 12, 2013, 01:36:46 am
content: Quote from: JuKu on June 11, 2013, 02:31:58 pmLadies & Gentlemen,we have a winner!
Book's for electronic beginners  - Page 1
Forum section: electronics / general

author: Dellyjoe
author_rank: Regular Contributor
timestamp: June 13, 2013, 06:23:29 pm
content: Hello everyone im sorry if this is posted on here before if so can you plz find me the link i could not find a link.Anyway im getting into elections for the first time this summer im going to try to become an EE major at Penn State and over the summer i need to get my hands on some books so i can start to study.Im dyslexic and reading for me is hard, but not never stopped me in life, but if you do know any books that are still have alot of info but have a easier read i would more likely be looking into them.Plz post any books that you found that you used over the years to help you get started. I would like books with projects in them or just books in alot of info.thanks for readingjoep:s-- i will be buyinghttp://astore.amazon.com/eevblogstore-20/detail/B004O8Z89Cnow if this is coming off of dave's amazon store does that mean it is coming right from his collection

author: robrenz
author_rank: Super Contributor
timestamp: June 13, 2013, 06:52:36 pm
content: Link here
Some neat Idea , Tick V on threads you'd like to get updates from :P  - Page 1
Forum section: electronics / general

author: eevblogfan
author_rank: Frequent Contributor
timestamp: June 17, 2013, 07:56:40 pm
content: HeyI thought about Asking Dave to arrange that feature , because I've seen A lot of threads I began to read and like 1Month after I saw them and regretted that I didn't followed them carefullyIf you can do that dave I'll thak you A lotthanks

author: robrenz
author_rank: Super Contributor
timestamp: June 17, 2013, 08:07:11 pm
content: Click the notify button on the threads you want and you will get an email

author: eevblogfan
author_rank: Frequent Contributor
timestamp: June 17, 2013, 08:10:37 pm
content: HeyEmail won't feet , I meant something like that PM Box , witch pops up into black and ther's number of messages ,something like that ,, perhaps red(Ish ) colored will do better ( much better is to put say 10 colors to choose )

author: justanothercanuck
author_rank: Frequent Contributor
timestamp: June 17, 2013, 08:46:15 pm
content: The notifications dealie is here:https://www.eevblog.com/forum/profile/?area=notificationYou can choose whether or not to have it email you, and all the threads you click "notify" on will show up there. Some forums call this "subscriptions" or "thread watching".
JBC tip cartridge pinout and power - Page 1
Forum section: electronics / general

author: Tooms
author_rank: Unknown
timestamp: June 10, 2013, 07:42:24 pm
content: HiI am thinking to use the very good JBC tip for some project and was looking at the net for the details about the tips but have not found what i need.it is the jbc tip cartridge with 3 pin connector.http://www.jbctools.com/tech-area.html#modulSLEEP&HIBERWhat is the pinout on them??what is the volt, amp, watt ??what type of sensor is there in them ??Hope your guys can help.Tooms

author: digsys
author_rank: Unknown
timestamp: June 10, 2013, 11:23:34 pm
content: Hi. Are you intending to make your own station and just use JBC hand-pieces? There are some quite long, well informed threads onthis site, just do a search for JBC. Many here rate is as their favourite brand, including myself. All the info you need is here, and quiterecent, so try that first (unless someone else pops up).

author: Rufus
author_rank: Super Contributor
timestamp: June 11, 2013, 03:29:28 am
content: Quote from: Tooms on June 10, 2013, 07:42:24 pmI repost this image from another thread here cos I can't be bothered to find it again.The heating element is about 2.4 ohms cold. The wire in a 245 hand piece is skinny 3 cores and about 0.12 ohms each.Not sure anyone knows exactly what the thermocouple is. Probably Nichrome is used for the heater element and one side of the thermocouple. The other side could be anything, possibly stainless steel maybe Nisil making it close to an N type. Another problem is the cold junction will be the other end of the cartridge which gets warm.JBC drive the heater with full half mains cycles at about 24v. They put about 170W into the heater during warmup. I am pretty sure the heater is driven through the thermocouple.I have considered the design of a controller for these cartridges and it isn't simple to do it properly. JBC measure the thermocouple during what looks like about 30uS of dead time around mains zero crossing.Someone in one of the other threads was making a controller but I don't think anything was posted recently - he probably discovered it isn't simple.

author: Tooms
author_rank: Unknown
timestamp: June 11, 2013, 05:43:44 am
content: Thanks guys, that is some good information and i will try search the forum for the other JBC threads.The idea is to see if they can be used as a heater in a 3d printer head and was thinking that JBC has used alot of design and test time to make them work very well so maybe they are working better then the normal resistor in the 3d printer head.I think i will try buy some of the JBC tip cartridge and see how it works.Tooms
Video blog advice? - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: June 07, 2013, 10:57:20 pm
content: So Dave inspired me to do a video blog, and I've gotten a few episodes out already. They're really short, and I shot four more today. A teardown and a few other things that interested me. But I'm really kind of skittish about actually getting them out there. My lighting sucks, it's not polished at all, and I'm really not comfortable behind a camera (that last one is me getting out of my comfort zone, but it's still a concern of mine).So what advice would you have for someone just starting out with the topic? I'm leaning towards "just get it out there, even if it sucks it's still more than most people do and there's plenty of time to refine it", but I'm still interested in hearing from people who are more experienced at it than I.

author: Unknown
author_rank: Unknown
timestamp: June 09, 2013, 09:40:55 pm
content: I am. It's difficult, but I posted a teardown last night, and have a few other odd things to put out over the next few days. Thanks for the encouragement.
Stacked BGA - Page 1
Forum section: electronics / general

author: IanB
author_rank: Super Contributor
timestamp: June 08, 2013, 02:43:51 am
content: I never knew:http://youtu.be/sx2HjuZBuo0?t=3mHow common is this manufacturing process? It seems complicated.

author: nuhamind2
author_rank: Regular Contributor
timestamp: June 08, 2013, 07:12:49 am
content: PoPhttp://en.wikipedia.org/wiki/Package_on_package

author: Psi
author_rank: Super Contributor
timestamp: June 08, 2013, 07:33:58 am
content: Quote from: IanB on June 08, 2013, 02:43:51 amIt's the first real world example i've seen of it being used in a product.

author: amyk
author_rank: Super Contributor
timestamp: June 08, 2013, 01:07:53 pm
content: It's been around for awhile in mobile phones.

author: free_electron
author_rank: Super Contributor
timestamp: June 08, 2013, 02:14:22 pm
content: Sheeh guys. Been around for years. Every tablet and smartphone uses this. Apples processor , samsungs exynos processor. They're all like that.Cpu is vottom shell. Top shell is the ram.

author: marshallh
author_rank: Unknown
timestamp: June 08, 2013, 04:59:56 pm
content: Here is a great resource on not only PoP assembly but modern assembly techniques as wellhttp://packageonpackagebook.com/Just enter some info and get the PDF.
dave's old dso article - Page 1
Forum section: electronics / general

author: peterthenovice
author_rank: Regular Contributor
timestamp: June 07, 2013, 05:06:03 am
content: Dave can you upload a pdf of your dso adapter? I would love to read that article.

author: EEVblog
author_rank: Unknown
timestamp: June 07, 2013, 07:44:37 am
content: I'll have to scan it.Don't think I've ever done that.

author: peterthenovice
author_rank: Regular Contributor
timestamp: June 09, 2013, 12:23:38 am
content: thanks for responding! I believe we would all like to see what the younger Dave has to say about electronics .
Uses for useless chips? - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: June 08, 2013, 05:23:40 am
content: I'm going through my box full of chips I just "liberated" over the past couple of days, and I find they fit into four categories.1) Chips I want (logic chips, common things like that I could always find a use for)2) Chips I might use someday (memory chips fall into this category)3) Chips I probably will never use (things like video switching chips fall into this category, and things like the Z80 CTC)4) Chips I could never possibly use (CMOS gate array quad packs fall into this category, along with microcontrollers with mask ROM)I know what I'm going to do with categories 1 and 2. Category 3 I could just dump into an anti static bag and sell them in one huge clump on ebay, or put them in the "for sale" area here so anyone who needs them can have them. But what to do with category 4? Recover them for gold? Any ideas?

author: AndreasF
author_rank: Frequent Contributor
timestamp: June 08, 2013, 07:36:38 am
content: There's the odd jewellery or other art piece that incorporates electronic components, if you're into this sort of thing. If not, see if any of your local artists is (Portland is full of them, I've heard)For instance, you could make a fake PCB (or use another old, useless one), solder on a couple of those chips, maybe some SMD passives, encase the whole thing in clear resin and sell it as coasters.

author: Alana
author_rank: Frequent Contributor
timestamp: June 08, 2013, 09:51:51 am
content: Did both for fun and as a cosplay costume. I still remember using 8749 cpu with quartz window as a fancy hairpin.

author: amyk
author_rank: Super Contributor
timestamp: June 08, 2013, 01:19:13 pm
content: Quote from: AndreasF on June 08, 2013, 07:36:38 am...ormake some snake oil...

author: millerb
author_rank: Regular Contributor
timestamp: June 08, 2013, 01:24:16 pm
content: I keep crap chips in a parts drawer to use as spacers from time to time in prototypes. The QFNs are particularly useful. I'll cut a hole in a piece of perf board and glue one of those in the hole when I need to deadbug another chip. Doing that lets me keep the pins on the chip I need to work with sunk in the hole so that the leads are flush with the surface of the board. This makes it easier to tack wires down onto them since they don't have to hang in the air.

author: SeanB
author_rank: Super Contributor
timestamp: June 08, 2013, 01:36:46 pm
content: I have used old Pentium CPU's as combs, they work quite well at it. Works well as a cat grooming device for short haired cats too.

author: Skimask
author_rank: Super Contributor
timestamp: June 08, 2013, 03:02:06 pm
content: Need an "I have "these parts" in my junkpile"....the whole "one man's junk is another man's treasure" thing...
Datasheet SMD code wtf - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: June 08, 2013, 12:57:15 am
content: I need to know what voltage an in-circuit diode with the marking S4 is rated to handle, however the datasheet says this...Seems totally pointless having the 3 codes if you cant distinguish the part from the code.http://www.diodes.com/datasheets/ds11013.pdf

author: ve7xen
author_rank: Super Contributor
timestamp: June 08, 2013, 01:08:49 am
content: I'd guess that 'SD103CW' binned parts are marked S6, 'SD103BW' bin marked S5 and 'SD103AW' bin marked S4. However they might ship you an SD103BW or SD103AW when you order SD103CW, depending on what their yield of each part was. Assuming all other specs are the same between them, anyway.But yeah, seems a bit silly to list it in the datasheet like that.

author: Psi
author_rank: Super Contributor
timestamp: June 08, 2013, 01:23:49 am
content: hm... yeah, you're probably right.Other than the rated voltages the specs are the same. So a higher voltage part should work fine in a product designed around the lower voltage part.

author: digsys
author_rank: Unknown
timestamp: June 08, 2013, 04:34:50 am
content: I've got SOT23-3 transistors with over-lapping part id#s, even totally different parts with the same markings (some I've NEVER figured out).Some sent by Farnell, who are SUPPOSED to be ISO9001 (or equivalent) certified ! Upon complaint, I was told, our "shipping method"carries the ISO rating, not the parts themselves !! WTF? There's just not enough room on these tiny parts sometimes to have a properid#. And some makers don't follow rules(?) too closely. Now they want to remove part Id#s off resistors !!! Don't get me started :-)

author: Psi
author_rank: Super Contributor
timestamp: June 08, 2013, 07:39:58 am
content: There's plenty of room, just have to laser etch the writing small enough.Personally i would much prefer having the complete component code done in tiny writing that requires magnification to read, rather than having a few large letters

author: digsys
author_rank: Unknown
timestamp: June 08, 2013, 09:32:46 am
content: Agreed, but in all the years I've read through countless publications, I've never heard it mentioned that any group or organisationis "looking into" this problem. Guess it's not a problem for the large automated manufacturers.

author: Psi
author_rank: Super Contributor
timestamp: June 08, 2013, 09:41:23 am
content: Yeah, it's because nothing is repaired any more, the entire PCB is replacedSo making individual components easy to identify isn't needed.I heard one manufacture plans to stop putting text on SMD resistors, think it was on this form.

author: amyk
author_rank: Super Contributor
timestamp: June 08, 2013, 01:10:11 pm
content: Quote from: Psi on June 08, 2013, 09:41:23 amResistors (and to a certain extent capacitors) aren't that much of an issue because we have DMMs... but actives are going to be a bit difficult. Apple has been doing the latter on its products (and omitting the silkscreen too), and it is very irritating.
UNSW Graduate to do scholarship with NASA - Page 1
Forum section: electronics / general

author: tec5c
author_rank: Frequent Contributor
timestamp: June 07, 2013, 01:01:39 pm
content: Hi all,I thought there might be a some (I guess, mostly from Australia) who would be interested in this. A UNSW (University of New South Wales, for those outside of Aus.) graduate has received a scholarship from NASA. Congratulations to him!Please refer to the following article for more info.http://www.electronicsnews.com.au/news/satellite-circuit-board-opens-doors-to-nasa
Sometimes I love surplus... - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: June 06, 2013, 11:48:07 pm
content: So today I went to the local surplus place to pick up some stuff to take apart/reverse engineer/whatever and I came across a board that had a 4x80 (I think) LCD and five buttons attached. It was part of an old "pick your wiper" assembly.Looking at it further, I noticed that it had a flash slot on the back that will need to be replaced. In fact, I'm not entirely sure WHAT kind of slot it is, I'll have to look into it further (I looked, it's an SD card slot). But that's replaceable. I looked closer at the board, though, and guess what it has on it: An ATMega64.So I'm not going to take this board apart, I'm going to try to fix the CF slot, and then I can do lots of cool stuff with it. It has room for tiny ISP, ISP, AND JTAG headers on it.Not bad for $5. Not bad at all.I'll post pictures when I get a chance to upload them.It looks like the SD card slot is an AXA2R73061. It also looks like those are available on tray and reel. Any suggestions on how to get just one?