hybridfree/eevblog-posts huggingface dataset:
The first OPEN PCB activity from ITead Studio - Page 1
Forum section: electronics / general

author: Alexx
author_rank: Contributor
timestamp: June 09, 2011, 05:33:05 am
content: When you make your prototyping PCB from us, we usually send you 10 pcs , now we offer this OPEN PCB activity to get 2 more PCBs at $0.1 cost.If your design and boards is not Privacy/Private, and it's no matter that share with other people, you can try this OPEN PCB service. We will make 12 pcs of your design/board, and ship you 10 pcs as normal , but 2 addition additional random boards - and the rest 2 boards of your design will be shipped to another guys who also purchased this service. So we give a random rely of the 2 extract boards , we don't know what you will get and if it's useful for you, but we know its designer allow sharing it with you.It's will be a funny activity and we hope you can make some new friends by the name,email or blog in the random board you get ...

author: Alexx
author_rank: Contributor
timestamp: June 09, 2011, 05:34:09 am
content: Add on the link of this activity:http://iteadstudio.com/service/share-your-design-and-get-two-more-pcbs/

author: Jon Chandler
author_rank: Frequent Contributor
timestamp: June 09, 2011, 06:31:02 am
content: Awesome! I need to order another set of boards so I'll be participating for sure.

author: ivan747
author_rank: Super Contributor
timestamp: June 09, 2011, 01:33:43 pm
content: Looks like a good idea. If anyone uses it, please give contact details in their board (specially email and usernames).

author: Alexx
author_rank: Contributor
timestamp: June 09, 2011, 04:40:10 pm
content: If you want to join this activity, we recommended you " put a URL or something google-able on the board so the random recipient can look up what it’s supposed to do "

author: Jon Chandler
author_rank: Frequent Contributor
timestamp: June 09, 2011, 04:58:59 pm
content: I need shorter URLs for a 5 cm x 5 cm boardThere's not a lot of room for extras!

author: scrat
author_rank: Frequent Contributor
timestamp: June 09, 2011, 05:14:37 pm
content: Great idea for sharing among the engineering people worldwide!

author: ivan747
author_rank: Super Contributor
timestamp: June 09, 2011, 08:24:38 pm
content: Quote from: Jon Chandler on June 09, 2011, 04:58:59 pmCheck out tinyurl.com of byt.ly . You enter an URL and they make a short link to it. byt.ly is shorter, of course.

author: flapjackboy
author_rank: Contributor
timestamp: June 11, 2011, 07:01:57 am
content: Quote from: Jon Chandler on June 09, 2011, 04:58:59 pmTry a QR code. Chances are someone getting your board will have a smartphone and can scan the code.
Which one has faster transient response? - Page 1
Forum section: electronics / general

author: onemilimeter
author_rank: Frequent Contributor
timestamp: June 10, 2011, 01:52:27 am
content: "linear voltage regulator" vs "switched-mode dc/dc converter"Which one has faster transient response?Cheers.

author: Zero999
author_rank: Super Contributor
timestamp: June 10, 2011, 02:35:06 am
content: Generally a linear regulator is faster but it depends on the design.
CERN experiment traps antimatter atoms for 1000 seconds. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: June 09, 2011, 08:30:08 pm
content: CERN experiment traps antimatter atoms for 1000 seconds.http://public.web.cern.ch/press/pressreleases/Releases2011/PR05.11E.html2WN-zk_giKwAlexander.
Questions on the gate drive circuit for power MOSFET - Page 1
Forum section: electronics / general

author: onemilimeter
author_rank: Frequent Contributor
timestamp: June 11, 2011, 08:56:37 pm
content: The figure shows the gate driver circuits for one of the three-phase legs.Here few questions:[ a ] Should the output driver pin, which is connected to the source of the power MOSFET, be connected to the "negative" (common) of the isolated PSU? In other words, can the isolated PSU, optocoupler, driver, and the source of the power MOSFET share a common reference point?[ b ] If the output gate drive voltage swings between 0V and +10V, does the circuit need back-to-back zener diodes near the gate? Or, only single zener diode is sufficient?[ c ] Please share if you know any limitation (drawback) or design considerations of the gate drive circuit.Thanks.
Dummy load, did they take advantage of David's popularity ? - Page 1
Forum section: electronics / general

author: DavidDLC
author_rank: Frequent Contributor
timestamp: June 06, 2011, 05:10:21 pm
content: http://dangerousprototypes.com/2011/06/06/programmable-electronic-dummy-load/It could be, me and some others in this forum started to build our own load based on David's project, so this means this little project has some popularity.

author: saturation
author_rank: Super Contributor
timestamp: June 06, 2011, 05:24:51 pm
content: That's a nice project. Worth the $22 because the fine adjustment will allow a user to mimic very small loads for low power apps which is fairly common these days and makes a good battery tester.

author: Mechatrommer
author_rank: Super Contributor
timestamp: June 06, 2011, 05:32:23 pm
content: Dave got video on it #102

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: June 06, 2011, 07:40:46 pm
content: Quote from: DavidDLC on June 06, 2011, 05:10:21 pmI appreciate that a lot of people think David is electronics God but it would be ridiculous to assume that he has invented regulated constant current load.

author: Unknown
author_rank: Unknown
timestamp: June 06, 2011, 08:04:52 pm
content: People have been making DIY constant current loads since time began and that was around before any mention around this small part of the world.On a different note, that's one of the pitfalls of 'Open-Hardware', it might make it up there and someone else making profit out of your work, with your blessing.

author: Bored@Work
author_rank: Super Contributor
timestamp: June 06, 2011, 08:30:15 pm
content: Really, what is the problem? ITeadstudio published the schematics and source code of the dummy load. Grab them and use the information to build your own, if you don't want to pay them. Open hardware and open source aren't one-way streets. It works both ways.

author: Zero999
author_rank: Super Contributor
timestamp: June 06, 2011, 08:47:47 pm
content: Quote from: BoredAtWork on June 06, 2011, 08:30:15 pmAgreed, if you don't want others using your design for profit, don't put it on the Internet.

author: DavidDLC
author_rank: Frequent Contributor
timestamp: June 06, 2011, 10:08:36 pm
content: Quote from: Leo Bodnar on June 06, 2011, 07:40:46 pmDang it, how can people misunderstand things. I said "popularity", not that he invented it.This is one example of how this project have some popularity or visibility:http://hackaday.com/2010/08/06/dummy-loads-and-heat-sinks/

author: EEVblog
author_rank: Unknown
timestamp: June 06, 2011, 11:25:01 pm
content: Quote from: Leo Bodnar on June 06, 2011, 07:40:46 pmWell yeah, it's hardly new!Dave.
Furby mod. Also, you will later jerk off to this :) - Page 1
Forum section: electronics / general

author: Wartex
author_rank: Frequent Contributor
timestamp: May 14, 2011, 08:07:11 pm
content: Furby circuit bending??

author: FreeThinker
author_rank: Frequent Contributor
timestamp: May 14, 2011, 08:43:35 pm
content: So that was Daves new 'consultancy' work. He didn't mention he was asked to be the new Dame Edna (or should that be Dave Edna)? What a hoot!Edit ** Just remembered the NDA, Hope I've not blown the gig for you! **

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 14, 2011, 10:58:51 pm
content: i need a babysitter. i got a twin coming!

author: mobbarley
author_rank: Regular Contributor
timestamp: May 15, 2011, 09:22:26 am
content: I like the idea of circuit bending but this one achieves the same results as most - a broken device that doesn't really do anything except annoy

author: vr2whf
author_rank: Contributor
timestamp: May 15, 2011, 12:10:47 pm
content: That's great. This Japanese girl looks so cute! especially the protective goggleAnother attraction is the brand new Hakko 951 soldering station.BTW, who made the English subtitle?I surrendered to this video!

author: pablo
author_rank: Contributor
timestamp: May 20, 2011, 05:30:31 am
content: mmmm..... she is way too lovely..... i fell in love with her.As dave would say... she can borrow my multimeter, if you know what i mean

author: Zero999
author_rank: Super Contributor
timestamp: May 20, 2011, 04:20:36 pm
content: I think she's far too young to look at, I prefer women who've finished puberty.

author: Ferroto
author_rank: Frequent Contributor
timestamp: May 21, 2011, 09:10:19 pm
content: Quote from: Hero999 on May 20, 2011, 04:20:36 pmShe looks like she's in her 20's to me. On an unrelated note why is she dressed like a French maid.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 21, 2011, 09:26:19 pm
content: QuoteYour Honour.

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 22, 2011, 12:56:15 am
content: Quote from: Ferroto on May 21, 2011, 09:10:19 pmthats the way it is. they like to get spanked like a slave.
MOSFET driver with internal charge pump and higher bootstrap supply voltage - Page 1
Forum section: electronics / general

author: onemilimeter
author_rank: Frequent Contributor
timestamp: June 04, 2011, 04:38:16 am
content: ISL2110- 100V, 3A/4A Peak, High Frequency Half-Bridge Drivers- Max Bootstrap Supply Voltage: 114VI'm looking for a high-side power MOSFET driver with internal charge pump for DC operation.Please share if you know any similar driver with higher bootstrap supply voltage than the ISL2110 above.Cheers
PIC Club. Sydney. June 14. Tuesday. uC Show and Tell. - Page 1
Forum section: electronics / general

author: JohnDowdell
author_rank: Newbie
timestamp: June 06, 2011, 11:33:15 am
content: This post serves either as a reminder or introduction to Sydney geeks about PIC Club Sydney.It's a handful of electronics geeks that get together for a couple of hours to share their electronics projects or point out useful tools and websites. It's not all Microchip PIC stuff. There's a mix of uC and non uC projects. The group is a mix of hobbyists, professionals and newly interesteds.The next meeting is June 14th 2011 Tuesday. Starting 6pm.http://picclub.factors-online.com/It is a subgroup of the Sydney PC User Group.I haven't been for maybe over a year now and I've only been 2 or 3 times total.It's held, as the web site says:1st Floor, Sydney Mechanics School of Arts,280 Pitt Street, Sydney.Some of the group hang out for a chat and bite to eat at a local bar/cafe (apologies to any young'uns who wouldn't get in)It's a bit of a hustle for me to get there from work so I've taken the day off.I'm pretty sure it's free for new faces but maybe bring a couple of shiny dollars for the coffee and biscuits jar just in case.There are contacts links to Neville Hoffman and Bob Backstrom of the group if needed.By the way, if you go, the pizza is for the SQL group that meets next door, not for PIC clubThe PIC Club room isn't big. Sometimes they close the door. You might have to knock and stick your head in.JD
Cross-reference product search tool from Analog Devices - Page 1
Forum section: electronics / general

author: johnmx
author_rank: Frequent Contributor
timestamp: June 02, 2011, 09:13:41 pm
content: This new search tool looks very useful.Description:“By performing a simple search across 19,000 lines of product information, you can find Analog Devices' equivalent to other manufacturers' products and alternative solutions for obsolete parts. In addition you can search for new or replacement Analog Devices' products.”http://www.analog.com/cpsearch/CrossReferenceSearch.aspx
Will spacecraft Tycho Brahe success this time ? - Page 1
Forum section: electronics / general

author: Bloch
author_rank: Unknown
timestamp: June 02, 2011, 08:00:44 pm
content: I dont know if it is in this forum for this but here it isMain pagehttp://www.copenhagensuborbitals.com/Live video and updateshttp://www.raketvenner.dk/launch/All is "home made" and "open source"I will cross my fingers for that to succeed this time

author: Mechatrommer
author_rank: Super Contributor
timestamp: June 02, 2011, 08:36:39 pm
content: i hope when they succeded, they will succed in keeping human alive for more than 1 minute in there.donation? how much it can help if i donate $1/month?

author: Bloch
author_rank: Unknown
timestamp: June 03, 2011, 06:44:12 am
content: Quote from: Mechatrommer on June 02, 2011, 08:36:39 pmNow it is on the way to launch area.Why dont you think they can doit ? They live for prove it for peopel to prove them wrongBy exampled Peter Madsen wanted a submarine. Then he did build one :-) the latest one is UC3 Nautilus it is 17,8 meter long and weight 32,5 tons. the tube is from an old windmillThis YouTube is a quick/fun talk about the

author: apex
author_rank: Regular Contributor
timestamp: June 03, 2011, 09:06:10 am
content: They will attempt to launch at 15:00 danish time, which is 13:00 UTC!If you want to see it live, here is a stream:http://raketvenner.dk/launch/apex

author: Hypernova
author_rank: Unknown
timestamp: June 03, 2011, 02:40:18 pm
content: Well the chute failed to open properly but the payload seems to have splashed down just fine.

author: Bloch
author_rank: Unknown
timestamp: June 05, 2011, 08:49:20 am
content: A bit jumpy but dam fast
MOVED: Altium Nanoboard 3000-Xilinx,Altera or Lattice variant? - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: May 31, 2011, 11:24:17 pm
content: This topic has been moved toAltium Designer.https://www.eevblog.com/forum/index.php?topic=201.0
MOVED: now that my hopes for Altium hobbyist edition have been dashed, now what? - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: May 31, 2011, 11:44:42 pm
content: This topic has been moved toAltium Designer.https://www.eevblog.com/forum/index.php?topic=3067.0
Hacker makes homebrew NMOS transistor in her electronics lab - Page 1
Forum section: electronics / general

author: Ferroto
author_rank: Frequent Contributor
timestamp: June 01, 2011, 10:01:21 am
content: So ya someone made a home made NMOS transistor in her home electronics lab not exactually sure how it works but it looks awesome.The theoryThe SCIENCE!!!!

author: the_raptor
author_rank: Regular Contributor
timestamp: June 01, 2011, 12:17:49 pm
content: AFAIK she is basically running a silicon mini-fab in her lab now.I am betting it won't be long until people are using optical etching processes at home and turning out old 70's 80's style ICs.

author: Zad
author_rank: Super Contributor
timestamp: June 01, 2011, 05:12:23 pm
content: So far as I know, Jeri didn't take this much further. Having proved the principle of the thing she moved on to other stuff. By the way, Jeri also has a scanning electron microscope in her lab - albeit in a number of cardboard boxes at the moment.Just because something can be done, doesn't mean that it will be done, or will be better than what is done already. People have been making fully working jet engines for a couple of decades now, but I don't see them making their own jet aircraft to nip to Italy for the weekend. It just isn't worth it. Why bother making a 4011 or even a processor core when you can buy them for pennies? Doing it to understand science and engineering is one thing, manufacture is another.
UNI-T model UT-70D - Page 1
Forum section: electronics / general

author: mzacharias
author_rank: Frequent Contributor
timestamp: May 27, 2011, 11:37:52 am
content: Well, my curiosity got the best of me. I'd been keeping an eye on this model (although with suspicion) because the specs etc looked impressive. When a used one came on eBay for 40.00 I couldn't help myself. I know Uni-T meters are somewhat controversial in these parts but I thought I'd give my first impressions of the UT-70D. A full review will follow soon.I was writing more but it started to take on the look of a full review, so if you are interested in more of my first impressions, I will post more over in the product review area.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 27, 2011, 06:36:04 pm
content: Let me link those threads , it looks that you had forgot to do it ..https://www.eevblog.com/forum/index.php?topic=3558.0And lets follow this link for replies too ( Just an suggestion )
The EEV Forum Birthday is at 13-10-2011  - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 28, 2011, 02:39:47 am
content: According the date that Dave got registered as first member (13-10-2009)The forum birthday ( or anniversary day ? ) will be the 13-10-2011 .We do have time ahead, and so its a good idea for adding your ideas ,of how we can celebrate the specific day ..Examples :contest with giftsspecial Blog episodegraphic banner ( 2 Years )other ? ( be my guest to add your ideas )

author: EEVblog
author_rank: Unknown
timestamp: May 28, 2011, 02:41:33 am
content: Fair way off, but wow, two years of the forum?Dave.
Electronics Porn Over 18s only - Page 1
Forum section: electronics / general

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 27, 2011, 08:16:49 pm
content: Seems like there is a joke for the first picture about "surface mount"...

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 27, 2011, 08:36:15 pm
content: you still need through hole.

author: tekfan
author_rank: Frequent Contributor
timestamp: May 27, 2011, 09:07:16 pm
content: Such a sad sight. I almost cried when I saw this.I hope they all find good owners.http://cgi.ebay.com/216-Test-Equip-Lot-HP-Agilent-Tektronix-Panasonic-Fluke-/230626960145?pt=BI_Analyzers&hash=item35b2702311

author: Time
author_rank: Frequent Contributor
timestamp: May 27, 2011, 09:07:36 pm
content: hahaha good response shafri

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 27, 2011, 09:59:16 pm
content: Someone emailed me these, plus a few others a few years ago -a few more on my site
First Arduino Compatible 32-bit Microcontroller - Page 1
Forum section: electronics / general

author: johnmx
author_rank: Frequent Contributor
timestamp: May 24, 2011, 11:17:15 pm
content: Microchip’s fanboys can now play with Arduinohttp://www.microchip.com/pagehandler/en-us/chipKIT-Development-Platform.html

author: Zad
author_rank: Super Contributor
timestamp: May 24, 2011, 11:34:59 pm
content: Just another random CPU on an Arduino I/O pin compatible PCB. If someone chooses to upgrade and learn a 32-bit architecture, then one based on one of the ARM designs would be far better.

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 24, 2011, 11:37:04 pm
content: The better description for these would be Arduino SHIELD compatible. Just that they have a similar layout to accept Ardunio shields.

author: EEVblog
author_rank: Unknown
timestamp: May 25, 2011, 07:27:07 am
content: Err, no, this isn't just another dev board with Arduino pinouts. It comes with the full Ardunio software environment written to support PIC's.Dave.

author: 8086
author_rank: Super Contributor
timestamp: May 25, 2011, 07:54:22 am
content: ARM, anyone?http://www.sparkfun.com/products/10664

author: Zad
author_rank: Super Contributor
timestamp: May 25, 2011, 04:32:04 pm
content: Better stillhttp://www.netduino.com/

author: Sal Ammoniac
author_rank: Super Contributor
timestamp: May 25, 2011, 09:46:30 pm
content: Quote from: Zad on May 25, 2011, 04:32:04 pmVery interesting. I looked on the Microsoft site and it says that .NET Micro requires 64KB RAM, 256KB Flash, yet this board only has 128KB Flash and 60KB RAM.

author: Bored@Work
author_rank: Super Contributor
timestamp: May 25, 2011, 10:21:02 pm
content: Quote from: Zad on May 25, 2011, 04:32:04 pmYou use a rather strange definition of "better". An embedded .NET, oh sure.

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 25, 2011, 11:52:00 pm
content: Quote from: BoredAtWork on May 25, 2011, 10:21:02 pmFor when you absolutely positively have too much Flash space on your chip.

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 27, 2011, 03:44:17 pm
content: I think the folks over at Aeroquad are working on a board for the STM32 processor, although I'm not sure if it will be Arduino software based. I didn't realize Arduino code will run this. It might be a smart move to keep the PIC 32 bit chips from getting some attention that otherwise seems to be going to ARM.
What generates less EMI: 74ACT series or 74LS - Page 1
Forum section: electronics / general

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: May 24, 2011, 09:32:34 pm
content: I have been considering replacing a few 74LS series logic ICs with 74ACT in an old instrument from 80s (https://www.eevblog.com/forum/index.php?topic=3502.0) that has sensitive analogue section.Mostly to reduce consumed power.This got me thinking whether this would reduce generated digital noise or increase it?74LS series has slower rise/fall times (~10ns) and higher consumed current (~50mA)74ACT have faster edges (~5ns or so) but lower idle power (~50uA.)What is the practical implication of switching from TTL logic to compatible CMOS technology?

author: Unknown
author_rank: Unknown
timestamp: May 24, 2011, 10:30:34 pm
content: I don't think idle power has much to do with noise, it's just DC. Dynamic power drawn during switching is much more significant, since this is drawn in short bursts. My money would be on the 74AC(T) generating more EMI, but this is just a guess.Any particular reason for choosing ACT over HCT? Faster edges are usually bad for EMI, everything else being equal.

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: May 24, 2011, 10:53:59 pm
content: Quote from: alm on May 24, 2011, 10:30:34 pmACT has much lower input currents so even though edges are sharper the switching currents energy density might be lower... This is still not very clear cut situation, isn't it?QuoteHCT has 4 times lower drive capacity and fan out ratio. I am replacing ICs one at a time in a complicated multi-bus system so I don't want to risk.

author: Unknown
author_rank: Unknown
timestamp: May 25, 2011, 09:47:22 pm
content: Quote from: Leo Bodnar on May 24, 2011, 10:53:59 pmAgreed. It may also depend on what part of the spectrum you're interested in, although fast edges tend to have a fairly broad spectrum. Noise from the LS parts is likely to be at lower frequencies, since they don't produce the fast transitions the AC(T) does.
Useless Machine - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: May 23, 2011, 07:15:40 pm
content: ??ON???OFF?

author: tekfan
author_rank: Frequent Contributor
timestamp: May 23, 2011, 08:37:41 pm
content: No comment

author: saturation
author_rank: Super Contributor
timestamp: May 23, 2011, 08:42:40 pm
content: That's hilarious! I've seen those gag toys that steal money placed on a sensor etc., so I thought this was similar. But its the end its different, and impressive, if its real. I presume this is not animation, the face appears different at the end.

author: comox
author_rank: Regular Contributor
timestamp: May 23, 2011, 09:09:35 pm
content: Agreed. Absolutely f**king hilarious!

author: Lance
author_rank: Frequent Contributor
timestamp: May 23, 2011, 10:16:42 pm
content: Now I wanna build one...How about this:UkgoSOSGrx4#ws

author: TheWelly888
author_rank: Frequent Contributor
timestamp: May 24, 2011, 12:32:44 pm
content: That gadget will tidy my workbench very nicely by knocking everything off it!
Need help with a Lambda WA303 power supply - Page 1
Forum section: electronics / general

author: Muza
author_rank: Contributor
timestamp: May 22, 2011, 10:08:22 pm
content: Hi,Sometime ago I got several Lambda WA303 (WA303 00 00 52) power supplies, and cant seem to find a way to make them work.these are 3in1 units with primary output 5v@30A and auxilary outputs 12v@10A and -12v@4AI've found a short datasheet athttp://www.us.tdk-lambda.com/lp/ftp/catalog/wa_fall94.pdfHere's a picture i tookI've used these for running 5v equipment with 12v. However, without a primary load (connected to 5v output) voltage on auxilary terminal drops down to 5v linearly when a load is applied (testing with a 12vDC motor+speed regulator). It can't be defective unit since others are behaving just like that.Are the sensing terminals wired wrong?Without a constant load on primary [0V,5V] output terminals, when i power a 12v motor from [0V,12V] terminals, at around 200-300mA either the protection kicks in or someother mechanism cuts the power.please advise

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 22, 2011, 11:14:44 pm
content: This device needs a minimum load of 5A .. so to operate .Read the second page , section : regulated voltage.

author: Muza
author_rank: Contributor
timestamp: May 23, 2011, 04:34:45 pm
content: Nice catch, thanks..That poses a problem, unless i figure out how to efficiently overcome this.Any ideas are appreciated

author: Unknown
author_rank: Unknown
timestamp: May 23, 2011, 10:48:48 pm
content: Some big honking load resistors? Or get a different power supply with specs that are a better fit for your application (which I gather is not drawing many amps at 5V).

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 23, 2011, 11:15:04 pm
content: Quote from: alm on May 23, 2011, 10:48:48 pmHi alm , I was also thinking about something like that , but its a bit wild as idea.So I found one more wild than this ..Add 20 of your motors on the output, and they will be fine ..

author: Muza
author_rank: Contributor
timestamp: May 24, 2011, 07:58:15 am
content: That's quite an original solutionWonder what neighbours will say to a two dozen of motors through the night
New FLUKE 287C model - Page 1
Forum section: electronics / general

author: pablo
author_rank: Contributor
timestamp: May 23, 2011, 11:59:00 pm
content: Hello there.Has anyone heard/seen about the supposedly new FLUKE 287C version?It seems to be a chinese or asian version but this is just my guess.I think that because when i google it, only shows asian characters webpages about it.I couldn't find any review or comparison against the current FLUKE 287.I found this on ebay:http://cgi.ebay.com/New-Fluke-287C-True-rms-Electronics-Digital-Multimeters-/320700067251?_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D5%26po%3DLVI%26ps%3D63%26clkid%3D140251030595930657It is more expensive than standar FLUKE 287.what you think?

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 24, 2011, 12:12:24 am
content: I think that if you find on it , one strong point,that is impossible to find it on another model or brand , you will love it.This is the proper way about shopping for tools.
Rigol 1052E Bug Report, Firmware 2.04 - Page 1
Forum section: electronics / general

author: saturation
author_rank: Super Contributor
timestamp: January 14, 2011, 02:31:18 am
content: Could use confirmation, fixes and checking if the following are still present in the more recent firmware versions:USB flash driveIf you save more than 10 files to external USB flash drive, thereafter at some point you'll get a file error. You may be able to still save files, but some of the files will be corrupted.Is there a safe way to remove the USB flash drive other than powering off the Rigol? Whether Rigol's functions are turned off or on, and the USB drive is not being accessed, removing the USB flash drive with the Rigol powered on crashes the Rigol. Its ok to insert it, but not remove it.FFTAfter over 1 hour of use, or after the file error with the USB flash drive, new harmonics appear in the FFT spectra. If you shut off the Rigol or reset to factory defaults, these harmonics disappear, and the distribution is what is expected, say with testing with a square wave.

author: torch
author_rank: Frequent Contributor
timestamp: May 23, 2011, 10:08:10 pm
content: I have saved 12 each of waveform, setups, bit map and csv to a USB memory stick with no problems noted whatsoever. When I unplug the USB stick, the unit displays "USB device removed" and continues to function normally. I can repeatedly insert and remove the USB stick without powering anything down.I can confirm the measurement bug noted in the other thread though. I suspect it is merely an artifact -- the memory space was not cleared. The automatic voltage measurement seems to record when running, not when stopped.Edit: I am using 02.04 SP1 and the scope is modded to a DS1152E-EDU

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 24, 2011, 03:40:40 am
content: ver 02.02 dont have the usb remove crash. never try the 10+ files though.
constant current regulator - Page 1
Forum section: electronics / general

author: angelo
author_rank: Contributor
timestamp: May 22, 2011, 05:58:50 am
content: hello all,I have a 20V source (wall wart) that im looking to use to power a 1.2A 5V laser diode driver, I'm using the wall wart to power a set of stepper motors as well, and I would like to use just the one supply. I could use a LM117 or 317 etc, but I feel like thats just wasting a lot of power and heat. Is there a better way to go about this.Thanks for the help

author: Bored@Work
author_rank: Super Contributor
timestamp: May 22, 2011, 06:57:59 am
content: Quote from: angelo on May 22, 2011, 05:58:50 amAn SMPS. Dave even did a whole video about designing one.

author: Zero999
author_rank: Super Contributor
timestamp: May 22, 2011, 09:11:55 am
content: Why not simply buy a 5V 1.2A wall wart? It'll probably even work out cheaper than designing an SMPS.
Nutter! Round 2 - Page 1
Forum section: electronics / general

author: Flavour Flave
author_rank: Regular Contributor
timestamp: May 18, 2011, 10:42:16 pm
content: Yo8d6d-lGZANeed second opinions on this!

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 18, 2011, 11:46:31 pm
content: very low voltage - not a problem as skin isn't conductive enough for a significant current to flow.

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 19, 2011, 12:21:10 am
content: V=IR. R is us!

author: benjius
author_rank: Contributor
timestamp: May 19, 2011, 02:59:02 am
content: I love his style the v-blog is really cool and fun to watch, one of my UK favorites along with Ashens of course !

author: Neilm
author_rank: Super Contributor
timestamp: May 19, 2011, 07:22:27 pm
content: I've seen testers that output 2000A - max output voltage 3V. Of course - the big problem with it is the heat generated from the connection. P=I^2 * R so 2kA into a 1m ohm resistor produces 4kW.Neil

author: Fraser
author_rank: Super Contributor
timestamp: May 19, 2011, 09:22:20 pm
content: Imagine the RFI this guy causes to his neigbours Terrestrial TV!

author: Sionyn
author_rank: Frequent Contributor
timestamp: May 19, 2011, 11:38:43 pm
content: i think the bbc is the least of his problems

author: Zero999
author_rank: Super Contributor
timestamp: May 20, 2011, 04:19:35 pm
content: Wow, the first video I've seen where he even mentions safety. This is better than the other videos.
Podcasts!?!? - Page 1
Forum section: electronics / general

author: st1
author_rank: Contributor
timestamp: May 19, 2011, 10:00:30 am
content: So When your done listen to the Amp hour, (witch we all do religiously)What other Electronic/Programming podcasts do you recommend?

author: Time
author_rank: Frequent Contributor
timestamp: May 19, 2011, 02:25:18 pm
content: http://www.nerdist.com/Chris Hardwick's is ok. Its not electronics or programming but I think most EE and programmers might enjoy it.

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 19, 2011, 04:16:55 pm
content: I enjoyhttp://soldersmoke.com/.Mostly HAM related, but often talk about other stuff that is cool, astronomy, general electronics, etc. Unfortunately, one of the two passed away after a couple dozen episodes and it is mostly one guy now with less back and forth. I'm still only about half way through them.
Seeking "Tasman Turtle Robot" project from Electronics Today International  - Page 1
Forum section: electronics / general

author: bluerwhite
author_rank: Newbie
timestamp: May 09, 2011, 12:51:38 am
content: I'm interested in the "Tasman Turtle Robot" referenced here:Branch A., Tasman Turtle Robot, Project 645, Electronics Today International, April 1982.Locally (USA), I cannot find the magazine, which started in Sydney. Does anybody know where I might find this article?Thanks,-Peter

author: EEVblog
author_rank: Unknown
timestamp: May 09, 2011, 05:39:05 am
content: Silicon Chip now own all rights to EA and ETI.You can likely get back issues from them.Dave.

author: bluerwhite
author_rank: Newbie
timestamp: May 09, 2011, 03:11:12 pm
content: Thanks for the tip, Dave.

author: bluerwhite
author_rank: Newbie
timestamp: May 19, 2011, 03:22:03 pm
content: For anybody else seeking articles from Electronics Today International, I've found two sources:The National Library of Australia has this magazine in their collection and will scan articles for a fee:http://catalogue.nla.gov.au/Record/2314443Silicon Chip offers back issues and reprints athttp://www.siliconchip.com.au/cms/printversion/backissues.html.
EU  Agilent VS Fluke  New price war .. or looks like it  - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 18, 2011, 01:42:28 am
content: For any one who has an interest to see how the prices are playing in Eurozone,mostly about the modelsFluke 87VFluke 28IIAgilent U1272A ( or similar )Check those links. ( All prices includes VAT )Poland :Agilent /http://www.distek.ro/en/Category/Test-and-Measurement-Equipments_Handheld-Multimeters_Agilent-434Fluke /http://www.distek.ro/en/Category/Test-and-Measurement-Equipments_Handheld-Multimeters_Fluke-414Germany /http://www.conrad.com/Digital-multimeters.htm?websale7=conrad-int&ci=SHOP_AREA_17622_1101010&page=3http://www.conrad.com/Digital-multimeters.htm?websale7=conrad-int&ci=SHOP_AREA_17622_1101010&page=2I also found the new Agilent U1272A , to be priced around to 350 EUR in France .Well usually I do not get to price wars, but this looks interesting .As from those examples , it looks that Agilent follows another tactic .And the what ever comparison just in the pricing level , gives an serious margin to Agilent.Especially in Germany that retails the 87V at 560 EUR with VAT in comparison with the U1272A at 410 EUR !!That is 50 EUR even more than the pricing found in France and Poland about the Agilent one.Right now I am acting more like an News reporter , than offering any opinion of my own.Even so if you find more European pricing from other countries add them on this thread too.

author: saturation
author_rank: Super Contributor
timestamp: May 18, 2011, 12:12:28 pm
content: Certainly very interesting prices. As I wrote before, all Agilent need do in the 1272a vs 87V promo is simply underprice the Fluke, and folks will think twice about which meter to get, if both meters are about equal in performance! Its very odd considering how weak the $US is to the Euro, it should be cheaper ... take the tax structure in that country for those differences.So far, we don't have such price differences in the US.
switch-mode LM78xx replacement - Page 1
Forum section: electronics / general

author: truhlik_fredy
author_rank: Regular Contributor
timestamp: May 16, 2011, 12:26:50 pm
content: Perhaps for somebody it could be interesting, the pin compatible replacement for linear regulators, the K78xxhttp://www.mornsun-power.com/de/product_inf.aspx?typeID=62For example, needing to regulate from 1A from 24V to 5V would be a lot of heat, but with this switching supplies should be much better.

author: Zero999
author_rank: Super Contributor
timestamp: May 16, 2011, 05:16:01 pm
content: An SMPS would also be more noisy.You can make your own fairly efficient switching regulator from a couple of transistors:http://www.romanblack.com/smps/smps.htm

author: FreeThinker
author_rank: Frequent Contributor
timestamp: May 16, 2011, 07:00:52 pm
content: Quote from: truhlik_fredy on May 16, 2011, 12:26:50 pmYep! I read the same article in this months Elektor magazine.

author: dfnr2
author_rank: Regular Contributor
timestamp: May 17, 2011, 04:03:47 pm
content: These seem identical to the CUI partshere. I would bet they are made by the same source. These are really nice to just drop in when you're updating a low volume design, as they are completely self contained, including the inductor; a couple of not so cheap caps are required, though, so including one of these parts may increase your cost by up to $15.Dave
finger print scanner from six feet away  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: May 17, 2011, 02:32:10 pm
content: Coming next - cloning fingerprints at a distancehttp://www.technologyreview.com/biomedicine/27052/

author: FreeThinker
author_rank: Frequent Contributor
timestamp: May 17, 2011, 03:53:40 pm
content: I was always getting into bother as an apprentice for having my hands in my pockets. Now it seems like a great idea. BigBrother sees all.
Book - Circuit Design, Know it All - Page 1
Forum section: electronics / general

author: Excavatoree
author_rank: Frequent Contributor
timestamp: May 16, 2011, 02:56:06 pm
content: I was searching to see if I could getTroubleshooting Analog Circuitsin electronic form, when I found this book:http://search.barnesandnoble.com/Circuit-Design/Darren-Ashby/e/9780080949659/?itm=2&USRI=bob+peaseBob Pease is listed as one of many authors. It looks pretty extensive, and it's about half the price ofThe Art of Electronics(Roughly, prices vary greatly)Has anyone heard of it? Does anyone have any thoughts, Opinions???

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 16, 2011, 04:04:31 pm
content: Very expensive for an electronic book. I have a Kindle, but won't lay that kind of money on something I can't physically sell later if I want.As for the book, not familiar with it.

author: Excavatoree
author_rank: Frequent Contributor
timestamp: May 16, 2011, 04:33:28 pm
content: I agree. The real book is actually cheaper, that's what I would consider buying. I just used that link to show the book I was asking about.

author: Bored@Work
author_rank: Super Contributor
timestamp: May 16, 2011, 06:04:48 pm
content: Quote from: Excavatoree on May 16, 2011, 02:56:06 pmMany authors for a textbook are usually a warning sign. It means some editor collected whatever material he could get. If the book was carefully planned from the beginning, and later carefully edited it might work out and the resulting book might be coherent. However, my experience with such books is that one ends up with a collection of loosely related essays. Often made from pre-existing material and only slightly, if at all, adapted for the book. If you are after an essay collection this might be fine. If you are after a few in-depth articles about specific subjects it might be fine, too.There are other cases where such books are fine, but as a textbook I would avoid it.Anyway, you could try if you can get a preview on Gooogle Books to see if it is ok for you.

author: Excavatoree
author_rank: Frequent Contributor
timestamp: May 17, 2011, 01:25:00 am
content: Ah, I should have caught that. Thanks for your good advice. I bet it's excerpts/reprints of Mr. Pease's collums or his Analog Troubleshooting book, which I already have.Embarrassing, but I'm glad I asked. I think I should stick with the time honored and highly recommendedArt of Electronics

author: Wim_L
author_rank: Regular Contributor
timestamp: May 17, 2011, 01:35:08 am
content: Yes, I have the paper version. Some good stuff in there, but some parts will be redundant if you already have Pease's articles. One advantage of this book is that it covers a lot. Probably not in enough detail to do a full design when it comes to the more advanced topics, but a good starting point.But yes, It's not a textbook. It's a bundled set of articles by different authors on various subjects.
Training - Page 1
Forum section: electronics / general

author: danntor
author_rank: Contributor
timestamp: May 14, 2011, 07:02:59 am
content: Anybody here currently doing some sort of cert/diploma(don't what the rest of the world calls a cert)? I am doing my Cert III through the ADF right now and it is alright(except for NIDA but that deserves a whole new thread about that atrocity). One thing I have noticed is that they do not cheap out on us(grabbed a couple part numbers and some of the equipment is worth about 4-5 grand!). More a thread for experiences I guess.

author: Cj1corbystarlet
author_rank: Contributor
timestamp: May 14, 2011, 07:36:01 am
content: The ADF is very good in buying the right equipment, when someones bucket of money will support it,What they lack is the ability to look after their current serving member in a attempt to try and hold onto "The brainy people".This "Brainy person" is on the way out.Ben

author: danntor
author_rank: Contributor
timestamp: May 14, 2011, 09:21:28 am
content: Which service mate? Another 3-4 months here until I am an ET.

author: Cj1corbystarlet
author_rank: Contributor
timestamp: May 14, 2011, 09:39:14 am
content: danntor, Sent a PM for obvious reasons
were is I - Page 1
Forum section: electronics / general

author: lgrfbs
author_rank: Contributor
timestamp: May 13, 2011, 04:30:22 pm
content: Can someone guess were this images is taken?

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 13, 2011, 04:36:42 pm
content: Well, you aren't there now, cause you took that picture over 11 days ago.But the EXIF Lat/Long info I was hoping to find in the JPG wasn't there, so I don't have the foggiest where that was taken.I don't believe this guy has an option for that:

author: Chet T16
author_rank: Frequent Contributor
timestamp: May 13, 2011, 04:45:52 pm
content: Sweden somewhere

author: lgrfbs
author_rank: Contributor
timestamp: May 13, 2011, 05:04:38 pm
content: sacherjjI removed the EXIF just for not do it to easy.Chet T16Yes, you are correct, can you say southern, middle or northern of Sweden?

author: Chet T16
author_rank: Frequent Contributor
timestamp: May 13, 2011, 05:06:41 pm
content: Middle, not too far from home?

author: lgrfbs
author_rank: Contributor
timestamp: May 13, 2011, 05:12:12 pm
content: Correct, here is a images with EXIF info.

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 13, 2011, 05:18:06 pm
content: Then here is the answer:http://maps.google.com/maps?f=q&q=loc:63.118540,14.784285&t=k&spn=0.5,0.5

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 13, 2011, 05:19:22 pm
content: earth! err... australia. just a guess right?ah busted!

author: Chet T16
author_rank: Frequent Contributor
timestamp: May 13, 2011, 05:22:14 pm
content: Using EXIF is cheating, i downloaded your CV and checked the address

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 13, 2011, 06:07:08 pm
content: gotcha in google earth!
Fluke 87 V - Page 1
Forum section: electronics / general

author: danntor
author_rank: Contributor
timestamp: May 13, 2011, 09:56:05 am
content: Just got my Fluke 87 V and I must say it is quite the tool. Going to be trying it out extensively when I poke and prod a broken SNES with it. Excellent recommendation so far.

author: saturation
author_rank: Super Contributor
timestamp: May 13, 2011, 11:09:27 am
content: Review it for us, then please. Always good to see a fresh point of view.

author: danntor
author_rank: Contributor
timestamp: May 13, 2011, 12:28:22 pm
content: Will give it a crack but keep in mind I study during the week(training to be an Electronics Technician funnily enough).

author: saturation
author_rank: Super Contributor
timestamp: May 13, 2011, 02:57:35 pm
content: Take your time, enjoy. As you use it for whatever work you do, it'll give you an impression you can share when you have time; its been reviewed by many in the past.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 13, 2011, 05:44:47 pm
content: Quote from: danntor on May 13, 2011, 09:56:05 amI had it for six months , and I agree with you.There is no need to crack it , the inner construction quality and parts are all ready known.The 87V it is a tool for professionals,lets hope that you will discover the true power of it ,in measurements far from the common ones, like measuring resistors and DC .
HP 1652B - Page 1
Forum section: electronics / general

author: cksa
author_rank: Regular Contributor
timestamp: May 11, 2011, 10:37:10 am
content: I just got given a HP 1652B Logic Analyzer from the EE department from school. However, it is faulty (that's why they gave it away). The only fault being reported that there's something wrong with the floppy disk drive.How are my chances of fixing this up? Is anyone familiar with this piece of equipment? Is it just a standard floppy disk drive that I can replace?Thanks

author: Jimmy
author_rank: Regular Contributor
timestamp: May 11, 2011, 12:15:29 pm
content: Yeah just a standard 3.5 inch floppy could be a problem with the disk or the drive try putting a cleaner disk in the drive and try the disk in another pc.from manualQuote

author: eliocor
author_rank: Unknown
timestamp: May 11, 2011, 12:30:08 pm
content: Try to reseat the floppy cable in its connectors.If I remember correctly, the floppy driver is a 720k one, but i'm not sure if its connector is standard.BTW, here you can find the 1652B service manual (and not only):http://www.hp1652bmanual.com/

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 11, 2011, 12:55:03 pm
content: It probably isn't quite the same as standard PC drive - I know the earlier 1650's used single-density (720K) drives. if the 1652 uses the same you may need to track down something like an old Atari 720K drive, and may also need to fiddle with jumper settings on the drive.Carefully cleaning out dust, reseating connectors and cleaning the heads would be a good first move.

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 11, 2011, 01:42:56 pm
content: This site might be helpful:http://www.hp1652bmanual.com/Did a search for 720k 3.5" drives on ebay. Holy snikeys... People are wanting $150+ for these.

author: baljemmett
author_rank: Unknown
timestamp: May 11, 2011, 01:45:50 pm
content: Quote from: mikeselectricstuff on May 11, 2011, 12:55:03 pmI believe it spins faster than (IBM) PC drives do, too, so a direct replacement won't work; when I was looking for information on the disk format used by my 1650B I came acrosshttp://www.classiccmp.org/pipermail/cctech/2003-May/014536.htmlwhich sounds like it uses a lot of the same gubbins as the original Mac drives.

author: cksa
author_rank: Regular Contributor
timestamp: May 13, 2011, 08:23:41 am
content: and all of a sudden...trying all sorts of different floppy disks...IT BOOTS UP!Uploaded withImageShack.us

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 13, 2011, 11:02:44 am
content: you may try to repair the original floppy. can be a good spare part or reference later.

author: saturation
author_rank: Super Contributor
timestamp: May 13, 2011, 11:14:56 am
content: If a floppy hasn't been used in years, the drive may be dirty and not spin correctly with dust in the mechanics. Just use it a while and it could 'self heal'. Try a container of compressed air and blow every orifice you can find clean out.
[Australia/NZ only] element-14 competition - Page 1
Forum section: electronics / general

author: johnboxall
author_rank: Unknown
timestamp: May 12, 2011, 10:13:13 am
content: element-14 Australia/New Zealand are running some simple random prize draws until June. The prizes aren't too shabby either, you can choose from a list. Worked for me, won a copy of Eagle Standard. Anyhow, to enter visit:http://element14.juicecms.com/giveaway/

author: Hypernova
author_rank: Unknown
timestamp: May 12, 2011, 05:04:51 pm
content: Signed up even though I in TW now, I'll just get them to send it to my mom in NZ first.
facebook compromise 600 million users  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: May 11, 2011, 07:39:28 pm
content: ive posted it on eevblog wall too hopeful protects daves viewershttp://www.symantec.com/connect/blogs/facebook-applications-accidentally-leaking-access-third-parties