hybridfree/eevblog-posts huggingface dataset:
Damn you element 14! - Page 1
Forum section: electronics / general

author: TopherTheME
author_rank: Regular Contributor
timestamp: October 19, 2010, 06:47:53 am
content: So its 2:30AM on a Tuesday and yet again I'm up late trouble shooting a project. I built a power management controller thing which contains two DC-DC converters, a fan controller, and a few other things. For some reason the switching controller chips (AD1621's) weren't working. I looked and I probed and eventually I found that there was something wrong with the resistors that are used to set the switching frequency of the controllers. Well, it turns out they weren't resistors at all! They were @#$%ing capacitors! Element-14 had sent me 1.56uF capacitors in bag labeled for 31.6kOhm resistors that I had ordered. Now I'm tempted to go through all the other components in the board and see if they're right. Anyway, moral of the story, don't always trust your vendor.Another 3 hours of my life gone to waste.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: October 19, 2010, 08:32:48 am
content: I've had a couple of occasions where they've sent incorrect SMD parts in the last couple of months - looks like they're too busy with all this rebranding bollocks than improving their service.
Yet another design contest - Page 1
Forum section: electronics / general

author: JohnS_AZ
author_rank: Frequent Contributor
timestamp: October 15, 2010, 02:28:29 pm
content: Granted, this one is a little lower rent than the others, but for what it's worth ...http://schmartboard.com/index.asp?page=mcu_2010

author: JohnS_AZ
author_rank: Frequent Contributor
timestamp: October 15, 2010, 07:07:47 pm
content: ... and if you have a geeky/nerdy girlfriend or wife in the US, here's one for her! *lol*http://www.etsy.com/nasa/index.php(yeah, yeah, yeah, this post was totally sexist.)
Lab Money - Page 1
Forum section: electronics / general

author: Strube09
author_rank: Regular Contributor
timestamp: September 16, 2010, 12:35:41 pm
content: Hey everyone,Does Dave just get a pay per click on the Tequiment link or does he get a cut of the sale?I just got $5000 given to me at work for some new equipment and, provided they have the best pricing, it looks like about 2-3000 will be purchased and tequipment.Some of the stuff on my list:Fluke 287 (need more logging meters. Already have the 8845 bench meter)Fluke 177 x2WR3000M Love this machine, might just get the WRS3000VXWD10022 Triple ouput Power suppliesFunction Generator, something basic prob instek SFG 1003Programmable DC Load (yes I could make the one on the video but I need CC, CV,CW options and this will require calibration certs)Need to find a good LCR Meter.Isolation Transformer (Address some safety issues in the lab)A Couple of panavisesI think that is it for now.... let me know what you guys think.Strube

author: EEVblog
author_rank: Unknown
timestamp: September 16, 2010, 12:46:14 pm
content: Quote from: Strube09 on September 16, 2010, 12:35:41 pmNo cut of the sale, or pay-per-click. They pay a fixed monthly ad fee.I get a 6% cut on any (US) Amazon products.Dave.

author: tequipment
author_rank: Regular Contributor
timestamp: September 20, 2010, 02:53:41 pm
content: Let me know if I can send you a quote.Appreciate it.ThanksEvanTequipment.NETAn Interworld Highway LLC Company1-877-742-TEST (8378) x141-732-222-7077 x141-732-222-7088 Fax205 Westwood AveLong Branch, NJ 07740

author: Strube09
author_rank: Regular Contributor
timestamp: September 20, 2010, 03:02:31 pm
content: Evan,Check your private messagesThanks,

author: cole1234
author_rank: Newbie
timestamp: October 13, 2010, 05:47:49 pm
content: Looking for an LCR Meter ..... I have had great experience with theAgilent 4263B LCR meter. Great that you have money to spend on some test equipment.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 13, 2010, 07:40:57 pm
content: Quote from: cole1234 on October 13, 2010, 05:47:49 pmyou are wandering around and spit your post anywhere you want. find proper place for it.
For Dave and the Back to the Future Fans - Page 1
Forum section: electronics / general

author: DJPhil
author_rank: Frequent Contributor
timestamp: October 13, 2010, 03:42:32 am
content: Turns out Michael J Fox wasn't the first Marty McFly. They released some footage of the first actor in the role for the 25th anniversary.http://io9.com/5661580/Thought you guys might dig it.

author: Hypernova
author_rank: Unknown
timestamp: October 13, 2010, 04:56:29 am
content: Heh, I may be badly biased but with Eric the footages felt like just another 80's film. The 'feel' was definitely not there.

author: ChrisGammell
author_rank: Unknown
timestamp: October 13, 2010, 01:21:16 pm
content: That's awesome! If it was my movie and I was doing the re-release, I would have cut that footage into one of the movies when he comes back from the past (and everything has changed). Can you imagine just having that as the default where it's no longer Michael J Fox? That would flip some people OUT!

author: migsantiago
author_rank: Frequent Contributor
timestamp: October 13, 2010, 01:25:52 pm
content: Wow, were there more changed actors besides J. Fox?
EEVblog lingo - Page 1
Forum section: electronics / general

author: osmosis321
author_rank: Regular Contributor
timestamp: October 12, 2010, 05:53:51 pm
content: I have a question about the way people talk on here, and instead of just asking the question I figured I'd turn it into a general thread on the terms used around here. That way everyone can use itMy question is why a certain well-known company that publishes an electronics CAD package is spelled with a "!" in it's name?

author: migsantiago
author_rank: Frequent Contributor
timestamp: October 12, 2010, 06:01:34 pm
content: Dave implemented a word detector on the forum. If it detects the name of the company, it replaces it with Altium. He may not want problems with the company he works for.

author: baljemmett
author_rank: Unknown
timestamp: October 12, 2010, 08:45:10 pm
content: Quote from: migsantiago on October 12, 2010, 06:01:34 pmI think in one of the live shows he explained that they look for people talking about them on the web, and although the company is fine with the blog etc. he'd been asked in the past to explain some comments people had made here -- so would rather avoid the situation in the future!

author: osmosis321
author_rank: Regular Contributor
timestamp: October 12, 2010, 09:59:19 pm
content: Hmm they must not be too bright if that fools 'em.

author: Simon
author_rank: Unknown
timestamp: October 13, 2010, 06:37:56 am
content: well unless they think of using the variant in searches there will not be a problem. it just makes life easier for all. managers are funny people you know, they will never see it your way
Today is 101010 !!! - Page 1
Forum section: electronics / general

author: Hypernova
author_rank: Unknown
timestamp: October 10, 2010, 10:48:34 am
content: and now try convert that to decimalOh and for all the Taiwanese out there (including yours truly) happy national day! May those commies on the other side burn! (just the governments of course, no disrespect for the people)

author: logictom
author_rank: Unknown
timestamp: October 10, 2010, 01:16:59 pm
content: 42Glad I'm not the only one to notice that today!

author: Vexer
author_rank: Contributor
timestamp: October 10, 2010, 02:26:32 pm
content: It's my birthday, lol.

author: orbiter
author_rank: Frequent Contributor
timestamp: October 10, 2010, 02:40:29 pm
content: Congrats Vex.. Happy Birthday

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 10, 2010, 03:01:22 pm
content: shut down your pc at 12 midnight, a very terrible virus will get spread!

author: logictom
author_rank: Unknown
timestamp: October 10, 2010, 03:03:11 pm
content: Quote from: Vexer on October 10, 2010, 02:26:32 pmHappy Birthday! Is it your 42nd birthday?Quote from: shafri on October 10, 2010, 03:01:22 pmBut which timezone? Or does the virus wait till midnight local time lol

author: AvrFan65
author_rank: Newbie
timestamp: October 10, 2010, 03:08:39 pm
content: Quote from: Hypernova on October 10, 2010, 10:48:34 amThere are 10 kind of people, those who understand binary, and those who don't....Jan

author: logictom
author_rank: Unknown
timestamp: October 10, 2010, 03:11:31 pm
content: But what about the other 8.....

author: Simon
author_rank: Unknown
timestamp: October 10, 2010, 03:47:12 pm
content: Quote from: logictom on October 10, 2010, 03:11:31 pmthen that makes you one who does not understand binary, there are no other 8, get it now ?

author: logictom
author_rank: Unknown
timestamp: October 10, 2010, 05:34:16 pm
content: Quote from: Simon on October 10, 2010, 03:47:12 pmYeah I know, I was messing around, if I didn't understand binary by now I'd be screwed

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 10, 2010, 06:00:29 pm
content: My luckiest day ...I got on ebay today,OCZram for the new system that I build for video editing...HALF price than the cheapest retail CL-5 locally2X1GB 4-4-4-12 1.8v(533 for Core 2 Duo 2.9G ) (22.87 EUR)

author: dimlow
author_rank: Frequent Contributor
timestamp: October 10, 2010, 06:03:14 pm
content: Mmm 42 Answer to the Ultimate Question of Life, the Universe and Everything Day!

author: apex
author_rank: Regular Contributor
timestamp: October 10, 2010, 08:23:40 pm
content: These Vogon spaceships are to late!apex

author: EEVblog
author_rank: Unknown
timestamp: October 12, 2010, 07:32:27 am
content: I was at Disneyland when I remembered and asked the wife to remind me to film the event at 10:10:10pm 10/10/10 but we completely forgot.Stupid me should have just set my alarm!Dave.
Another oscilloscope - Page 1
Forum section: electronics / general

author: DavidDLC
author_rank: Frequent Contributor
timestamp: October 14, 2010, 09:06:38 pm
content: This is also another alternative for hobby use:http://hackaday.com/2010/10/14/android-oscilloscope/

author: sonicj
author_rank: Frequent Contributor
timestamp: October 15, 2010, 04:40:10 am
content: hmm... i was wondering the other day if SPP would be fast enough to display this sort of thing. looks purdy snappy!heres a link to the 16 bit DSC he used -Link. is that a dev board hes using? iwantneed one of those!-sj

author: saturation
author_rank: Super Contributor
timestamp: October 15, 2010, 11:46:36 am
content: Nice job. Looks like a prototype, given what's photographed. Made in the Philippines, it seems. Excellent. If you look at the PCB, he has great soldering and glueing skills too.
Electrical test - Fluke 28II Min-Ave-MAX  - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 09, 2010, 03:07:26 pm
content: In the factory that I work currently, we have a team of electricians , and we repair anything,even the inner street lights ( light poles ) , that are about 8 meters high , and we use an special car with basket so to lift us up. ( yes I get on the basket too )And so here is an example of one of those lights. ( you can see them at the highways as singles or in dual formation)The specific ones holds in, two tubes 150W (220v) its one ..The measurement lasted about 30 minutes , and here are the results within pictures ..The true warm up time ( light was dimmed ) was like 5 minutes .It took about 15 minutes to stabilize at the average value.And so it started at 3.2 Amperes ( starting Amperage ) , and slowly as soon the gas in the tube heat up,the light become brighter and the Amperes fall at the normal levels .

author: GeoffS
author_rank: Unknown
timestamp: October 09, 2010, 03:37:21 pm
content: No pictures!

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 09, 2010, 03:58:05 pm
content: i got the pictures! but i dont get it. are you measuring AAC? hardly can be seen in the picture. any reason why two thumbs up? are you sure the readin is correct? whats your basis?

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 09, 2010, 11:03:54 pm
content: The pictures are working ..The measurement are in Amperes ACAnd the two thumps are because I have only twoThe pictures are from mobile phone, that's why I look like a Ghost..

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 10, 2010, 04:06:45 am
content: Quote from: Kiriakos-GR on October 09, 2010, 11:03:54 pmyou can have 1 only (or no at all), up to max 4. Just sit on the bench, raise both of your hand and foot, then u'll have 4 thumbs up! then u'll looks like "The Ghost Monkey!"ps: look behind your head at another bench behind, looks like a lady's hair! urrggghh scaryyy!

author: Simon
author_rank: Unknown
timestamp: October 10, 2010, 09:44:56 am
content: there are no pictures

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 10, 2010, 10:26:33 am
content: Quote from: Simon on October 10, 2010, 09:44:56 ami'm not sure, but i got it. maybe you can try cleaning your browser cache?

author: Simon
author_rank: Unknown
timestamp: October 10, 2010, 10:33:11 am
content: I've tried with another browser too

author: GeoffS
author_rank: Unknown
timestamp: October 10, 2010, 10:36:35 am
content: I've tried with Firefox. opera and Safari, still no pictures.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 10, 2010, 06:21:43 pm
content: People ... the pictures are attached .. at the forum = forum server.At my end, they work ok ...
Home made clapper switch. - Page 1
Forum section: electronics / general

author: lesserwords
author_rank: Newbie
timestamp: October 06, 2010, 01:29:41 am
content: Ok... I wanna make a clapper switch for my room if you can or know where i can get the circuit schematics to make one that works with the correct sound(double hand clapping) I will be very great full.pa. Dont make it too expensive

author: NiHaoMike
author_rank: Super Contributor
timestamp: October 06, 2010, 02:57:52 am
content: Cheap microphone connected to a low cost PIC through a one transistor amplifier and simple RC filters. The PIC processes the filtered signal by checking for the correct durations of loud and quiet to avoid false triggering.

author: lesserwords
author_rank: Newbie
timestamp: October 08, 2010, 12:09:17 am
content: Thanks for your help.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 08, 2010, 12:10:29 am
content: pls re-route to the same thread athttps://www.eevblog.com/forum/index.php?topic=1447.0and make your reply there. if there is lock button for the OP, pls lock this thread. Cheers

author: Zero999
author_rank: Super Contributor
timestamp: October 08, 2010, 11:23:32 am
content: Perhaps Simon could merge the two topics?Cross posting is very annoying, if it isn't against the rules it should be.
Bad multimeter build quality - Page 1
Forum section: electronics / general

author: TheBla222
author_rank: Newbie
timestamp: October 06, 2010, 03:28:11 pm
content: was looking on the internet today and came across this i think you guys should look and see what you make am no expert but i know this is BAD this is worse than the build of the ones in the Why cheap multimeter's suck video Dave didgo down to DT-830BCheck it outhttp://www.robotroom.com/Multimeter-Reviews.html

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 06, 2010, 03:57:04 pm
content: This is an very old page , its best to pay attention in the ones reviewed here.There is no need for an father who likes to measure the batteries of the remote controlled car ,that the junior plays with , to pay more than 6 $ for an DMM.Yes, in this life there is also small needs , that even the smallest DMM, it can do the trick.

author: TheBla222
author_rank: Newbie
timestamp: October 06, 2010, 04:04:23 pm
content: yes this is the best forum to go i think but i was just looking at multimeter reviewsbut when i saw it i couldn't help but post it on hear

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 06, 2010, 06:23:48 pm
content: even though the page is old, but most of the DMM are still around, so i think the page is still relevant.

author: Unknown
author_rank: Unknown
timestamp: October 06, 2010, 07:34:35 pm
content: Quote from: Kiriakos-GR on October 06, 2010, 03:57:04 pmAgreed, not everyone needs a professional tool, but I would prefer it if they were just limited to 50V or so, and stated so one the packaging. That would eliminate a significant part of the safety issues.
Pspice: Convergence problem - Page 1
Forum section: electronics / general

author: s.mosfet
author_rank: Contributor
timestamp: October 03, 2010, 08:33:45 am
content: Hi,i've problems to simulate this circuit in orcad pspice:it says:ERROR -- Convergence problem in transient analysis at Time = 289.3E-06Time step = 196.1E-15, minimum allowable step size = 1.000E-12These supply currents failed to converge:I(X_U3.xinstlm338t.VV38) = -58.24pA \ -55.71pAwhat's happen?thanks, bye

author: TheWelly888
author_rank: Frequent Contributor
timestamp: October 03, 2010, 11:07:25 am
content: The AC sources appear to be both in phase.Set them to be 180 degrees out of phase of each other.

author: Zero999
author_rank: Super Contributor
timestamp: October 03, 2010, 11:40:05 am
content: It won't work with the AC sources 180oout of phase. The AC sources are connected in series with each other with the 0V connected to the tap.The circuit is correct as it is, although I'd question the series resistance and filter capacitor values.

author: Unknown
author_rank: Unknown
timestamp: October 03, 2010, 12:01:57 pm
content: Maybe the LM337 dislikes the (ideal?) C16 at its output with zero ESR?

author: Time
author_rank: Frequent Contributor
timestamp: October 03, 2010, 03:40:37 pm
content: Make your time step larger

author: TheWelly888
author_rank: Frequent Contributor
timestamp: October 06, 2010, 07:39:19 pm
content: Might it be a little bit quicker to breadboard the design?
Market News :  Danaher to Acquire Keithley Instruments  - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 05, 2010, 08:13:28 pm
content: Danaher to Acquire Keithley InstrumentsWashington, D.C. and Solon, OH,September 29, 2010- Danaher Corporation (NYSE:DHR) and Keithley Instruments, Inc. (NYSE: KEI) announced today that they have entered into a definitive merger agreement pursuant to which Danaher will acquire all of the outstanding Common Shares and Class B Common Shares of Keithley at a purchase price of $21.60 per share in cash for an enterprise value of approximately $300 million net of cash to be assumed. The acquisition has been unanimously approved by the Keithley Board of Directors.More -->http://www.danaher.com/news/news_detail.asp?key=386

author: Rhythmtech
author_rank: Regular Contributor
timestamp: October 05, 2010, 08:35:48 pm
content: Wow, and the competition keeps dwindling to fewer companies. May be a good opportunity in the near future start up a Test and Measurement company to fill niches and voids left behind by all of the mergers.

author: Bored@Work
author_rank: Super Contributor
timestamp: October 05, 2010, 08:45:33 pm
content: You are a week latehttps://www.eevblog.com/forum/index.php?topic=1386.0

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 05, 2010, 10:07:39 pm
content: I do not care ..Next time use less Americanish language , so the titles of your messages to become more widely understandable.

author: Time
author_rank: Frequent Contributor
timestamp: October 06, 2010, 02:39:10 pm
content: "Another ones bites the dust" is a term coined by and made famous by a British music rock group called "Queen". Technically its "Britishish language" he used.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 06, 2010, 03:12:05 pm
content: Quote from: BoredAtWork on October 05, 2010, 08:45:33 pmQuote from: Kiriakos-GR on October 05, 2010, 10:07:39 pmI'm not a linguist, but they are both the same and i like expanding my semantics translation skill. Anyway, i sense world domination plan for this so called Danaher. Once they got all in their hand, they can do anything they want.my 2cnts.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: October 06, 2010, 03:27:51 pm
content: Quote from: Time on October 06, 2010, 02:39:10 pmMy style are the " Born to be wild " type of songs , easy rider with enduro motorcycles and stuff ..
I want to know what dave thinks of the parallax Propeller microcontroller - Page 1
Forum section: electronics / general

author: firehopper
author_rank: Frequent Contributor
timestamp: October 01, 2010, 10:24:37 pm
content: Just call me silly

author: Hypernova
author_rank: Unknown
timestamp: October 01, 2010, 10:40:10 pm
content: Those chips sure look interesting. Though if you want something multi threaded you might as well go all out and try XMOS.I'm also pretty interested in what he thinks of the PSoC's, I was reading through the data sheet of the versions with 24 UDB's and it looked as if there was a hole in heaven and a MCU fell out.

author: firehopper
author_rank: Frequent Contributor
timestamp: October 05, 2010, 12:03:42 pm
content: I use one in a animatronic costume to controll 6 servos and some i2c leds (blinkm's), eventually use it to also check the battery lvl once I get some good adc's (the prop does not have one built in)I can understand spincode better than I can C or c++. but I am learning arduino stuff since I am using one to build a quadrotor heli.

author: TopherTheME
author_rank: Regular Contributor
timestamp: October 05, 2010, 04:14:42 pm
content: I thought about using them in a project or two but at $8 a chip I decided not to bother learning how to use them. For that price I'd rather put in the extra effort of using a PIC ($0).QuoteI'm really interested in these as well, I just wish the dev boards weren't so dam expensive.
Reverse engineer Rigol 1052E oscilloscope? - Page 1
Forum section: electronics / general

author: dds
author_rank: Contributor
timestamp: October 04, 2010, 12:18:58 pm
content: How much will be the price for professional(s) to do that? Huge amount of money?

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 04, 2010, 02:09:25 pm
content: huge amount of effort!

author: Unknown
author_rank: Unknown
timestamp: October 04, 2010, 02:21:05 pm
content: Just ask Atten

author: Zad
author_rank: Super Contributor
timestamp: October 04, 2010, 09:41:47 pm
content: Most of the difficult/interesting stuff is inside the FPGA, all the analogue amps, switching etc is pretty trivial.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 05, 2010, 02:17:21 am
content: Quote from: Zad on October 04, 2010, 09:41:47 pmteach me plss.
Switch help. - Page 1
Forum section: electronics / general

author: lesserwords
author_rank: Newbie
timestamp: October 04, 2010, 09:28:54 pm
content: I need help i need to find a switch with 4 pins that pretty much works like these =<. The two other conductivities get isolated and those two connect. please if you know of a switch that does these reply ASAP.

author: DavidDLC
author_rank: Frequent Contributor
timestamp: October 04, 2010, 09:34:25 pm
content: Google for DPDT switch and see if that is what you are looking for.

author: JohnS_AZ
author_rank: Frequent Contributor
timestamp: October 04, 2010, 09:37:32 pm
content: I don't think you'll find a switch that does what you want with 4 pins. As David said, You'll need a DPDT switch, and use 4 of the 6 terminals.

author: lesserwords
author_rank: Newbie
timestamp: October 05, 2010, 12:10:13 am
content: Thanks a bunch.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 05, 2010, 02:15:11 am
content: you'll get more than what you want for $5 herehttp://cgi.ebay.com.my/2-4-6-8-Position-DIP-Switch-Assorted-35-pcs-/250706299357?pt=LH_DefaultDomain_0&hash=item3a5f4289dd
New  Digital Multimeter - Page 1
Forum section: electronics / general

author: House91320
author_rank: Regular Contributor
timestamp: October 03, 2010, 05:52:39 pm
content: I need to get a new Digital Multimeter what do you think of this onehttp://www.newark.com/extech-instruments/ex420/digital-multimeter/dp/27K7563.

author: semaphore
author_rank: Contributor
timestamp: October 03, 2010, 06:03:28 pm
content: The link doesn't work.For looking at the URL I'm assuming you're talking about Extech EX420 correct?

author: House91320
author_rank: Regular Contributor
timestamp: October 03, 2010, 06:06:12 pm
content: yes sorry about the link

author: House91320
author_rank: Regular Contributor
timestamp: October 03, 2010, 06:07:42 pm
content: new linkhttp://www.extech.com/instruments/product.asp?catid=48&prodid=271
rigol DS1052E - Page 1
Forum section: electronics / general

author: bogdan546
author_rank: Contributor
timestamp: September 24, 2010, 03:49:30 pm
content: Please tell me which is the original of the three photosI saw two have not written on the front ultrazoomhttp://yfrog.com/bfrigol2jxhttp://www.iimmgg.com/image/5daee762a8308b6657a9ebf3a2616980http://www.iimmgg.com/image/924776f1ed7b4c8940d5f263c7c12ae9http://www.iimmgg.com/image/8076435027f06af154305c1d5400999b

author: rossmoffett
author_rank: Regular Contributor
timestamp: September 24, 2010, 05:14:37 pm
content: Dead link.

author: bogdan546
author_rank: Contributor
timestamp: September 24, 2010, 05:54:29 pm
content: now should be good links

author: beerhunter
author_rank: Contributor
timestamp: September 24, 2010, 11:23:11 pm
content: I emailed RigolNA to see if I could get the Ultrazoom logo plate and they replied that it was discontinued due to "legal" reasons. Rats!

author: Bored@Work
author_rank: Super Contributor
timestamp: September 24, 2010, 11:38:32 pm
content: Quote from: beerhunter on September 24, 2010, 11:23:11 pmThe United States Patent and Trademark Office lists an UltraZoom trademark for several categories. And it is indeed not owned by Rigol. That could be the legal reason Rigol North American mentioned.

author: beerhunter
author_rank: Contributor
timestamp: September 25, 2010, 04:25:02 pm
content: Yep! Sounds about right.....

author: Unknown
author_rank: Unknown
timestamp: September 26, 2010, 06:12:52 pm
content: Or maybe it was considered too close to Megazoom (I think this was an HP/Agilent brand), which actually is used in the same industry.

author: bogdan546
author_rank: Contributor
timestamp: September 26, 2010, 06:22:21 pm
content: so everything is a matter of copyright and there is no problem with not having ultrazoom Rigol

author: beerhunter
author_rank: Contributor
timestamp: September 27, 2010, 09:20:06 pm
content: Correct!

author: Unknown
author_rank: Unknown
timestamp: September 28, 2010, 04:28:23 am
content: Actually copyright law is quite different from trademark law in most countries, but I guess that's close enough

author: bogdan546
author_rank: Contributor
timestamp: October 02, 2010, 09:16:19 pm
content: I saw that is used BSTZ AD9288-40 maximum conversion rate is 40How did the Chinese to make it to 100?likely that the question was put, but I did not understand exactly answer

author: Unknown
author_rank: Unknown
timestamp: October 02, 2010, 09:25:11 pm
content: A lot was written about that topic on this forum. The short version is that they overclock the ADCs (run outside spec). Opinions vary on how bad this is.

author: bogdan546
author_rank: Contributor
timestamp: October 03, 2010, 08:47:29 am
content: so polished ADC not to see what others are greedy
Graphene ultracapacitor story in Spectrum - Page 1
Forum section: electronics / general

author: DJPhil
author_rank: Frequent Contributor
timestamp: October 01, 2010, 09:40:41 am
content: Interesting stuff, they got one working as an AC filter cap!I wonder how many years until they're cheap enough to play with . . .http://spectrum.ieee.org/semiconductors/nanotechnology/graphene-ultracapacitor-could-shrink-systems/

author: Simon
author_rank: Unknown
timestamp: October 01, 2010, 12:10:36 pm
content: very interesting, their description of AC ripple in rectified DC is a bit ropy but we know what they mean. sounds like a great step in getting higher capacity storage without loosing charge/discharge speed

author: Time
author_rank: Frequent Contributor
timestamp: October 01, 2010, 02:53:16 pm
content: They will truly change the world when they can hold off significantly high voltages.

author: Simon
author_rank: Unknown
timestamp: October 01, 2010, 02:55:38 pm
content: they will probably replace batteries some day, the big problem with electric vehicles is the weight and volume ratios to the power stored
an obscure RF device of some sort? - Page 1
Forum section: electronics / general

author: slburris
author_rank: Frequent Contributor
timestamp: September 30, 2010, 03:11:44 pm
content: From the junk box of the father of a colleague...This looks like it has N connectors on each end, and the tubecan be adjusted in length. What is it? Some sort ofRF cavity filter?Scott

author: migsantiago
author_rank: Frequent Contributor
timestamp: September 30, 2010, 03:29:45 pm
content: It looks like a pneumatic piston.

author: Time
author_rank: Frequent Contributor
timestamp: September 30, 2010, 03:46:24 pm
content: My guess is some kind of tubeable cavity meant for matching.

author: sonicj
author_rank: Frequent Contributor
timestamp: September 30, 2010, 03:53:28 pm
content: im guessing a partial antenna tuner.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 30, 2010, 05:11:15 pm
content: This is an home made Gamma match dipole .The length of the fat tube , can tell the frequency that it was built for.The construction look heavy , so it can handle about 2KW RF ,looks to was serving for an "point to point" transmitting link .The pipe that holds the " Antenna " ( missing from the picture ) , it should act as the negative pole of the dipole.Still the permanent adjuster on the capacitor , look like that it was build more as an experimental , than an usable item .
fart intensity detector !!    - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 21, 2010, 12:24:11 pm
content: Do not look at me ....look at that ....http://courses.cit.cornell.edu/ee476/FinalProjects/s2009/rac82_mos22/rac82_mos22/index.htm

author: orbiter
author_rank: Frequent Contributor
timestamp: September 21, 2010, 12:27:12 pm
content: LOL.. I can't believe there isn't a video

author: scrat
author_rank: Frequent Contributor
timestamp: September 21, 2010, 01:10:33 pm
content: Very good projectAnd very very useful! How many times people have desired an objective measurement for their fart contests!

author: Zero999
author_rank: Super Contributor
timestamp: September 21, 2010, 01:27:34 pm
content: Quote from: orbiter on September 21, 2010, 12:27:12 pmThat's probably a good thing.Now I know what to suggest to annoying students who start threads asking for a final year project.

author: TopherTheME
author_rank: Regular Contributor
timestamp: September 21, 2010, 02:31:04 pm
content: They totally got their that physics wrong when it comes to fart speed and effective area but a cool project none the less.

author: FreeThinker
author_rank: Frequent Contributor
timestamp: September 25, 2010, 01:04:30 pm
content: Nice to see Technology being put to good use for a change.

author: sonicj
author_rank: Frequent Contributor
timestamp: September 26, 2010, 01:29:08 am
content: america's future in e-tech looks bright indeed!i wonder what grade this project received?-sj

author: Mechatrommer
author_rank: Super Contributor
timestamp: September 26, 2010, 06:06:38 am
content: hmmm. where to put our butthole?

author: Zero999
author_rank: Super Contributor
timestamp: September 26, 2010, 07:34:43 am
content: They probably got a D for build quality, assuming it actually did work.

author: sonicj
author_rank: Frequent Contributor
timestamp: September 27, 2010, 06:24:42 pm
content: Quote from: Hero999 on September 26, 2010, 07:34:43 amif that thing worked, they deserve some sort engineering award because there isn't a single wire hooked up to that µc! lol!-sj
Suggestion for good homes for ex-review equipment - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 24, 2010, 09:20:41 am
content: I notice that Sydney has a hackerspace :http://hackerspace.pbworks.com/I'm sure they would welcome donations of ex-review test gear, and make good use of it, as would other hackerspace type projects, who I'm sure would be happy to pay for domestic shipping.BTW Dave, have you ever been to aDorkbot Sydney?meeting?If you wanted to explore the possibility of a local Maker Faire type vent, these would be the guys to talk to about how to go about it.

author: djsb
author_rank: Super Contributor
timestamp: September 24, 2010, 10:13:08 am
content: Talking about hackspaces. There is one in Londonhttp://wiki.hackspace.org.uk/wiki/London_HackspaceNot been to it yet as the membership fee (£40) is a bit steep for me at the moment.Just thought people would be interested.

author: Zero999
author_rank: Super Contributor
timestamp: September 24, 2010, 10:24:15 am
content: I would've thought he would sell all the ex-review equipment he doesn't need on ebay.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 24, 2010, 09:06:07 pm
content: Quote from: djsb on September 24, 2010, 10:13:08 amThey have a regular 'open night' every Tues evening from 7:30PM. In practice the membership fee is fairly flexible, depending on how much you use the facilities.

author: EEVblog
author_rank: Unknown
timestamp: September 24, 2010, 10:59:53 pm
content: Quote from: Hero999 on September 24, 2010, 10:24:15 amI likely will eventually for anything worthwhile.Smashed up $50 and $100 meters aren't worth much though!I've already donated 6 workbenches to the Sydney Hacker Space.Dave.

author: aXit
author_rank: Contributor
timestamp: September 28, 2010, 04:46:24 am
content: Do you attend the Sydney hackerspace often dave?I saw you on the member list, but I've never seen you there.

author: EEVblog
author_rank: Unknown
timestamp: September 28, 2010, 05:43:12 am
content: Quote from: aXit on September 28, 2010, 04:46:24 amNever been there actually!It's on the opposite side of Sydney to me, and I've never actually had a need to go there and hang out to do stuff, so it's kinda been hard to find an excuse to go. One day!Dave.

author: aXit
author_rank: Contributor
timestamp: September 28, 2010, 06:28:54 am
content: Yeah, I'm in near hornsby, bit of a trek. But I have friends there now, so I go most saturdays.Mostly software guys there anyway, although the TWO working makerbots last weekend was funNeed more solder programmers there.
Nike patents self-lacing shoes from back to the future for 2015 release! - Page 1
Forum section: electronics / general

author: aron_d
author_rank: Newbie
timestamp: September 04, 2010, 10:39:38 pm
content: Nike recently filed a patent for the self-lacing shoes Marty McFly uses in episode II (set in 2015), link to the article:http://theweek.com/article/index/206593/nikes-patented-marty-mcfly-shoesHere's a patent drawing:http://www.worstpreviews.com/images/headlines/temp/temp2285.jpgIt's not clear to me from the drawing how the actuator to pull the laces works, I was thinking that would be the hardest part of the design. CheersAron

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 04, 2010, 10:57:02 pm
content: The last 60 days my last electricity bill , came a bit loaded ...I am trying to find ways to lighten it up , charging shoes for self-lacing ,its not something that I would spent money for.

author: ziq8tsi
author_rank: Regular Contributor
timestamp: September 05, 2010, 01:03:22 am
content: imagine the hassles with airport security when your shoe xrays show up wiring and (lithium?) batteries...

author: Zero999
author_rank: Super Contributor
timestamp: September 05, 2010, 07:35:20 pm
content: I would've thought it would charge from the energy spent walking.Seems like a pointless gimmick to me, I wonder how much a pair will cost?

author: Mechatrommer
author_rank: Super Contributor
timestamp: September 05, 2010, 08:25:14 pm
content: sometime i think, technological advancement will make us more lazier and lazier.but its good, to save time if we are too busy (productive) on something else.the drawback, if you run out of battery then you will walk with unlaced shoes... or unable to unlace

author: Strube09
author_rank: Regular Contributor
timestamp: September 29, 2010, 02:57:11 pm
content: Hmmm... Just saw this...Video.... Watch the first part:http://tv.yahoo.com/daytime/video/gma-ellen-martha/21710870/Doesn't she know that nike patented this? And those shoes she has are clearly not nikeSee how this one plays out
Microchip and Boston ESC - Page 1
Forum section: electronics / general

author: Strube09
author_rank: Regular Contributor
timestamp: September 22, 2010, 02:57:41 pm
content: Just thought it was interesting...Microchip has a live feed at their booth at the ESC in Boston.Nothing too exciting just thought I would share it. I think Chris Gammell is there...maybe we can get him to go over there and make a fool of himselfwww.microchip.com/escStrube

author: Mechatrommer
author_rank: Super Contributor
timestamp: September 22, 2010, 04:14:50 pm
content: Quote from: Strube09 on September 22, 2010, 02:57:41 pmLOL) that will be fun! sadly i wont be able to make it
DMM  IP :  ( Code rating )  & explanations  - Page 1
Forum section: electronics / general

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: September 22, 2010, 01:16:03 pm
content: Well if you own mostly an FLUKE DMM , its possible to see on the specs ,an description about IP + two digits ..If you care to find, in what it translates to ... check this link .http://www.aquatext.com/tables/ip_ratings.htm

author: PeterG
author_rank: Frequent Contributor
timestamp: September 22, 2010, 01:36:27 pm
content: Nice find.Regards
Has anyone worked with MEMS resonators for timing? - Page 1
Forum section: electronics / general

author: DJPhil
author_rank: Frequent Contributor
timestamp: September 21, 2010, 10:43:46 am
content: I was just poking around the wonderful world of ceramic resonators and crystals, and saw a category for these at Mouser.Most of the literature I can find about these is laid on pretty thick with marketing piffle, so I thought I'd ask around and see if anyone's worked with them yet.Is anyone familiar with the basic benefits and drawbacks vs. quartz?What sorts of projects would benefit from this technology?It seems like MEMS will be the timing widget of choice when it gets better and cheaper. It seems like they're advancing at such a pace that it'll be hard to have good answers for these questions that are current or will last long, but I think we'll all start hearing more about these soon.What do you folks think?

author: Zero999
author_rank: Super Contributor
timestamp: September 21, 2010, 10:49:54 am
content: I've never heard of it before.I Googled it and found this article.http://www.sitime.com/news/articles/mems_manufacturing.pdf

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 21, 2010, 01:27:45 pm
content: I think teh major benefit is they are made of silicon, and so can integrate oscillators and dividers on-chip, and can be packaged in conventional plastic packages instead of hermetically sealed metal/ceramic.I think they are also more resiliant to shock and vibration.

author: Zero999
author_rank: Super Contributor
timestamp: September 21, 2010, 02:08:44 pm
content: I suppose in future there will be microcontrollers with clocks more accurate than today's crystal oscillators without any external components.

author: JohnS_AZ
author_rank: Frequent Contributor
timestamp: September 21, 2010, 02:13:02 pm
content: They would also be easier to temperature compensate at the silicon level ... ie. sensor on the same substrate.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 21, 2010, 03:36:48 pm
content: Quote from: Hero999 on September 21, 2010, 02:08:44 pmMicrochip already do one with 0.25% onboard RC OSC to allow USB with no resonator. Many now do 1% which is fine for serial comms.

author: Zero999
author_rank: Super Contributor
timestamp: September 21, 2010, 04:50:49 pm
content: Quote from: mikeselectricstuff on September 21, 2010, 03:36:48 pm0.25% is very poor compared to a piezo crystal, to put is into perspective, if one used such a MCU to build a clock with, it could loose or gain 3 minutes and 36 seconds per day which is +/- 21h 54m 54s per year.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 21, 2010, 05:18:39 pm
content: Quote from: Hero999 on September 21, 2010, 04:50:49 pmAbsolutely - there will always be apps that need crystals, or MEMs once they get good enough, but RC oscs are already eating into ceramic resonator, and low-end Xtal territory. Once you get accurate enough for UART and USB using RC, the number of apps that need the increased accuracy of a crystal reduces significantly.
IRC? - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: September 17, 2010, 01:59:09 am
content: Ok, I'm trying to set up an IRC client to use with the live chat. U stream recommend mIRC which I'm using.I follow the instructions here:http://www.ustream.tv/forum/showthread.php?370-mIRC-and-ustream.tvBut nothing works, I just get "connection refused".I've tried both "ustream" and "eevblog" for the group name.How do others IRC into the Ustream chat?Dave.

author: joelby
author_rank: Frequent Contributor
timestamp: September 17, 2010, 02:12:24 am
content: Quote from: EEVblog on September 17, 2010, 01:59:09 amIt works for me. If you're at work it's possible that port 6667 has been blocked. If not, then who knows!

author: EEVblog
author_rank: Unknown
timestamp: September 17, 2010, 03:06:00 am
content: Quote from: joelby on September 17, 2010, 02:12:24 amYeah, I'll try it from home.Thanks.Dave.

author: Time
author_rank: Frequent Contributor
timestamp: September 17, 2010, 05:22:48 pm
content: I idle in IRC chats all the time on irc.gamesurge.net. I use mIRC for my client, its great.

author: ArtemisGoldfish
author_rank: Regular Contributor
timestamp: September 18, 2010, 07:32:52 am
content: I also chat in IRC quite a bit, using KVirc as a client, since it's free and pretty-looking. Pretty much the best network I've come across is Freenode.net, especially the ##electronics channel there. Lots of cool people, just like this forum
TENMA electronic gears - Page 1
Forum section: electronics / general

author: MrPlacid
author_rank: Frequent Contributor
timestamp: September 16, 2010, 05:59:37 am
content: Anyone know what's the deal with TENMA electronic gears being on the cheap side?

author: saturation
author_rank: Super Contributor
timestamp: September 16, 2010, 11:05:11 am
content: Its often rebadged gear from someone else. If you find the original maker you can find it even cheaper:This TENMA 8 MHz scope was $430 at Amazon.The Uni-t is $140 at eBay, + $35 S&H.

author: Bored@Work
author_rank: Super Contributor
timestamp: September 16, 2010, 06:40:04 pm
content: TENMA is a brand of Farnell. I have never seen something original under the TENMA brand, only rebranded products.Sometimes it is funny when you find the same item twice in the Farnell shop, under the original brand, and under then TENMA brand. I have no idea why they do that, or why they at all think they must rebrand some things under their own brand. Maybe a brainfart of some MBA.

author: TopherTheME
author_rank: Regular Contributor
timestamp: September 16, 2010, 06:48:48 pm
content: I've got a Tenma soldering station. Its actually not that bad. Much better than the equivalent weller soldering station and for a lower price.
must see: easter egg in HP function generator - Page 1
Forum section: electronics / general

author: GeoffS
author_rank: Unknown
timestamp: September 14, 2010, 08:09:43 am
content: So that's why their equipment is so damned expensive!

author: Zero999
author_rank: Super Contributor
timestamp: September 14, 2010, 10:20:40 am
content: I can buy a novelty greetings card which plays a tune for much less.

author: saturation
author_rank: Super Contributor
timestamp: September 14, 2010, 03:01:44 pm
content: How did you find it?

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 14, 2010, 03:36:03 pm
content: Quote from: saturation on September 14, 2010, 03:01:44 pmProbably here

author: Rhythmtech
author_rank: Regular Contributor
timestamp: September 14, 2010, 05:57:44 pm
content: Sweet, from a time when designs were refined, refined again, then again, and then you added an easter egg.

author: Zad
author_rank: Super Contributor
timestamp: September 15, 2010, 04:22:40 am
content: Coincidentally, Handel's Messiah (from which this is taken) was completed on September 14th 1741.

author: ArtemisGoldfish
author_rank: Regular Contributor
timestamp: September 16, 2010, 01:02:49 am
content: Some HP Oscilloscopes also have tetris built-in. They like hiding surprises in their equipment

author: L-Charlotte
author_rank: Newbie
timestamp: September 16, 2010, 08:58:04 am
content: Awesome! Chiptune from? 1983?
A Time before Computers?  Weston Engineering Notes - Page 1
Forum section: electronics / general

author: Jon Chandler
author_rank: Frequent Contributor
timestamp: September 11, 2010, 01:47:27 am
content: It was a time before transistors and LEDs, indeed, it was the dawn of the computer age!I have a collection of Weston Electrical Instrument Corporation Engineering Notes that I've posted on theTAP-28 page.The first group is from 1946 and make fascinating reading. The link to the Engineering Notes is at the bottom of the column on the left of the page.Truly amazing when you realize these notes were published before the days of a computer on every desk and before desktop publishing. The artwork was done by hand!Below is a picture of the well-equipped engineer's desk. Looks a little like Dave's don't you think?I hope you enjoy this look into the past. I'll post more as I get them scanned,Jon

author: saturation
author_rank: Super Contributor
timestamp: September 11, 2010, 07:58:50 pm
content: Very George Pal. Nice! An early computer the GE Differential Analyzer used in the movie, When Worlds Collide!

author: Jon Chandler
author_rank: Frequent Contributor
timestamp: September 15, 2010, 06:01:27 am
content: I've added Volume 2 of the Engineering Notes and an index for Volumes 1 and 2.Hope you enjoy!JonThe original geeks:

author: DJPhil
author_rank: Frequent Contributor
timestamp: September 16, 2010, 07:58:44 am
content: Quote from: Jon Chandler on September 15, 2010, 06:01:27 amThe dour looking guy front row center is Prof Éleuthère Mascart!This guy was a wholesale science badass, and I wrote a report on him when I was in school. He was into just about everything: electricity, meteorology, optics, chemistry, physics, math, politics, you name it. He did a heap of work on earth's magnetic field, and basically wrote the book on the subject after taking a quick field trip to Cape Horn for some measurements. He was a go-to guy for science and tech advice for several European governments for decades, sort of like a Michio Kaku to the stars. He was a research machine and churned out stuff on electricity, optics, and meteorology like crazy.The meeting this photo was taken at was a big deal. Physicists were arguing about standardizing electrical units, and after a bunch of work (including the arguments over who to name what after) they settled on the formal definition of the Ohm, and I think the Volt as well (it was one of these meetings around this time anyway). I'd never seen this picture before! It looks like they might have stuck him in charge of moderating and photographed him after, he looks pretty ticked off.Really good stuff!

author: L-Charlotte
author_rank: Newbie
timestamp: September 16, 2010, 08:56:44 am
content: that is really good stuff !!!but why all the classic engineers have that big mustache :-D