hybridfree/eevblog-posts huggingface dataset:
How to test an analog oscilloscope before buying? - Page 1
Forum section: electronics / general

author: Mint.
author_rank: Frequent Contributor
timestamp: May 09, 2012, 10:51:06 am
content: So I have made a choice to buy an analog oscilloscope today, but before I actually buy it I would like to find out how do I test it and what to look out for. The seller said that he does not mind if anyone tests it before buying and it is pickup only so it shouldn't be too much of a problem for me in terms of actually having a look at the instrument. A function generator will be available there for testing it.

author: Nermash
author_rank: Frequent Contributor
timestamp: May 09, 2012, 11:27:29 am
content: Check Dave's video on Tek 2225, he gave some good pointers there.

author: Spawn
author_rank: Frequent Contributor
timestamp: May 09, 2012, 11:30:48 am
content: Lol Nermash, you was just a second before me, anyways here is the video and like Nermash said Dave tells you how to check the beam and such:

author: BravoV
author_rank: Super Contributor
timestamp: May 09, 2012, 11:50:15 am
content: Assuming you already familiar with the basic of analog scope, if you know the exact model, suggesting :- If available at the net, download the user manual and spend some time to get the feel and with adequate know how on how to use the knobs and switches for that particular model. This is important.- Certain high end analog scope has diagnostic routine can be triggered manually by pushing certain buttons or knobs sequence, memorize it if that model has it.- Since the seller has the FG, this is very good and just make sure they have the coax cable with bnc and bring yours if they dont, I know this sounds trivial, but it will very annoying if you stand in front of a scope and FG but dont have the accesories needed, also small thing like terminator, scope probe if you have one and etc.- I assumed you have some sort of diy voltage reference, no need for ultra accurate, bring it too, once verified against your dmm, this at least it will help you on checking the vertical accuracy.- Make sure you can have enough time like turning the scope on say for 15 mins to see if its stable enough.Had similar situation when I bought my tek 2465b, and if somehow you spotted any inaccuracy say like vertical against your vref, this might be reason to bargain for a better price.

author: Psi
author_rank: Super Contributor
timestamp: May 09, 2012, 12:26:43 pm
content: This rule isn't just for oscilloscopes, in fact its for everything and anything.Whenever i buy something i always check all 8 corners of the box or device.If its ever been dropped the chances are it will have landed on one corner and it will leave a flattened area in the plastic, metal or cardboard box.You'd be surprised how often you see a flattened corner on stuff, even new stuff in the shop.It's a simple thing to check but is often overlooked.

author: Mint.
author_rank: Frequent Contributor
timestamp: May 10, 2012, 11:15:38 am
content: Thanks heaps guys!
FLUKE Safety Notices and Recalls  190 ScopeMeter 1AC-I VoltAlertTM Digital Clamp - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: May 10, 2012, 06:59:59 pm
content: Fluke

author: Monkeh
author_rank: Super Contributor
timestamp: May 10, 2012, 08:24:38 pm
content: Quote from: ErikTheNorwegian on May 10, 2012, 06:59:59 pmNon-contact testers aren't 100% reliable? Who woulda thunk it.
Keithley SourceMeter SMU Newark Special Offer !  - Page 1
Forum section: electronics / general

author: T4P
author_rank: Super Contributor
timestamp: May 08, 2012, 04:48:32 pm
content: http://www.newark.com/jsp/bespoke/bespoke9.jsp?bespokepage=newark/en_US/landing/keithley/promotions_smu.jsp&CMP=OAD-SOM-Facebook-KeithleyOn a another note,http://www.facebook.com/element14page/posts/352632291466837OR,http://www.farnell.com/tektronix/?CMP=SOM-FB-tektronix-offer

author: free_electron
author_rank: Super Contributor
timestamp: May 08, 2012, 06:08:18 pm
content: at 4200 $ a pop they can afford to throw in some other goodies ...

author: T4P
author_rank: Super Contributor
timestamp: May 09, 2012, 01:39:43 pm
content: Quote from: free_electron on May 08, 2012, 06:08:18 pmExactly.
capacitors with va va voom - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: May 08, 2012, 08:03:45 am
content: i'll take a dozen of those

author: Rerouter
author_rank: Super Contributor
timestamp: May 08, 2012, 08:05:13 am
content: perhaps a link or some level of explanation towards what exactly they are?

author: siliconmix
author_rank: Frequent Contributor
timestamp: May 08, 2012, 08:07:34 am
content: ooops

author: G7PSK
author_rank: Super Contributor
timestamp: May 08, 2012, 05:18:13 pm
content: Induction heating for case hardening is being taken over by lasers these days as it is more versatile. You don't need a machine for every job. But very interesting video.
Bjork TV Tear Down - Page 1
Forum section: electronics / general

author: Time
author_rank: Frequent Contributor
timestamp: May 07, 2012, 02:13:26 am
content: Bjork Tears down her TV for us...Such strange innocence.

author: siliconmix
author_rank: Frequent Contributor
timestamp: May 07, 2012, 08:19:32 am
content: electrons fhhh.she didn't mention any sprites or anything.fail

author: amyk
author_rank: Super Contributor
timestamp: May 07, 2012, 08:51:09 am
content: That was rather underwhelming.Watching with auto-transcribe, however, was hilarious

author: TriodeTiger
author_rank: Regular Contributor
timestamp: May 07, 2012, 08:03:04 pm
content: Necessary mention: Dave and Chris talked about and linked to this on their Feb 22 '11 showhttp://www.theamphour.com/2011/02/22/the-amp-hour-31-publish-popular-parts-please/I guess you can consider that their opinion if you are interested.

author: Time
author_rank: Frequent Contributor
timestamp: May 07, 2012, 10:33:51 pm
content: Actually, that must be where I originally saw it from.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: May 07, 2012, 11:11:10 pm
content: Gives me an idea for a new TV series - "Celebrity teardown" where celebs take stuff apart and try to make sense of it while having the piss taken out of them by people who actually know what they're talking about.Add a Darwin factor - stuff is plugged in - weeds out the dumb ones that don't figure out they need to unplug it first...!

author: RCMR
author_rank: Frequent Contributor
timestamp: May 08, 2012, 12:51:38 am
content: Come on, we all know that this was Dave in drag!

author: TriodeTiger
author_rank: Regular Contributor
timestamp: May 08, 2012, 09:34:41 am
content: Quote from: RCMR on May 08, 2012, 12:51:38 amIs nothing sacred in the world of electronics anymore?

author: bfritz
author_rank: Regular Contributor
timestamp: May 08, 2012, 10:17:50 pm
content: I'm really bad...When she took the back off, I hoped she would notice the anode lead, and the rubber end on it, and say "Look, a suction cup holds this in place. Let me get my fingers under here, and pop it off."Of course the coating on the tube forms a large capacitor, and the set even once powered off can have thousands of volts. Coming into contact with it, can really give you a real bad "jump start". Perhaps she has done this before... maybe that accounts for the hair style!
what a little beauty stirling engine - Page 1
Forum section: electronics / general

author: steve_w
author_rank: Regular Contributor
timestamp: April 30, 2012, 03:19:10 am
content: Hey Silicon...do you surf the net looking for quirky videos? You have posted a few beauties.regardsSW

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 30, 2012, 08:13:47 am
content: nah just stuff i'm interested in.that "baruman" he makes some great machines .

author: sonicj
author_rank: Frequent Contributor
timestamp: May 01, 2012, 05:52:00 am
content: i need a lathe!is there some reason we don't hear much about solar collector/sterling generator systems? seems like they would be quite efficient??-sj

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: May 01, 2012, 07:22:41 am
content: Stirling engines are fun, I've seen one that would work on the heat of a coffee mug. It was specially designed for that, kinda like a lid, but with cute little engine on top!

author: siliconmix
author_rank: Frequent Contributor
timestamp: May 01, 2012, 07:38:21 am
content: i was thinking .when pv solar are used usually a inefficient inverter is used which from what i've heard run hot .it would be cool to have a stirling or a peltier atop of the heat sink and feed the current back into the system

author: steve_w
author_rank: Regular Contributor
timestamp: May 08, 2012, 11:40:06 am
content: Stirling engine is about 30% efficient, there is a mob in canada flogging a 25 Kw model, would be interested to see that suckerregardsSW

author: siliconmix
author_rank: Frequent Contributor
timestamp: May 08, 2012, 01:44:02 pm
content: i just like the simplicity .i've seen one with compressed air 52% efficient.
videoblog topics - Page 1
Forum section: electronics / general

author: s.mosfet
author_rank: Contributor
timestamp: May 07, 2012, 05:24:39 pm
content: I would to create a videoblog. I'm a graduating student (Msc) in electronic engineering...But which kind of videoblog can i start? which topics? any suggestions?

author: T4P
author_rank: Super Contributor
timestamp: May 07, 2012, 05:52:32 pm
content: Well basically anything you want,Rants, reviews, teardowns, explanation, tutorialsWhatever goes!

author: benemorius
author_rank: Regular Contributor
timestamp: May 07, 2012, 07:23:33 pm
content: Dave's PSU series has been a big hit. I suspect that any video series covering a project's workflow from design to production would do similarly well provided that the project is something everyone can relate to.

author: EEVblog
author_rank: Unknown
timestamp: May 07, 2012, 11:24:26 pm
content: Whatever interests you, do that!Dave.

author: Mint.
author_rank: Frequent Contributor
timestamp: May 08, 2012, 12:16:29 am
content: Quote from: EEVblog on May 07, 2012, 11:24:26 pmYeah what Dave said! I am interested in watching your video's would you mind sending me a link to your YouTube channel when you start?
I wish I had the DIY budget to.... - Page 1
Forum section: electronics / general

author: Time
author_rank: Frequent Contributor
timestamp: May 08, 2012, 04:12:05 pm
content: ...make something like this:http://techcrunch.com/2012/05/08/this-real-rc-car-transformer-is-ready-to-roll-out/

author: A-sic Enginerd
author_rank: Regular Contributor
timestamp: May 08, 2012, 11:47:47 pm
content: that's pretty sweet.Too funny though, I could probably muster the budget, but what I lack most is your screen name.
Death of a RF probe - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: May 07, 2012, 01:16:14 pm
content: Hi all. I went to use an rf probe that I made many years ago and found that it had expired of old age. One of the diodes a Mullard OA 90 which is much the same as a IN96 has gone high both ways. All I have to hand today are some BA479 and BA244 will either of these work as the data sheets lable them as switching diodes or do I need to wait to get something better,I would like to get this working today and its a bank holiday here in the UK.

author: jimmc
author_rank: Frequent Contributor
timestamp: May 07, 2012, 01:59:28 pm
content: The BA479 is easy, it's a PIN diode specifically designed not to rectify RF!What frequency and input voltage are you looking at?I have seen some probe designs that rely on the reverse leakage current of the detector diode to work.Assuming that yours is not one of these, the BA244 should work although it won't do as well as the original.(The turn on voltage of a silicon diode is higher than that of a germanium diode.)Jim

author: G7PSK
author_rank: Super Contributor
timestamp: May 07, 2012, 02:05:38 pm
content: Thanks for the answer I have only just realized that the equivalent book I have is transistors only for all the modern stuff. Frequency is up to 144 MHZ. It is only a simple test probe.

author: NiHaoMike
author_rank: Super Contributor
timestamp: May 08, 2012, 02:51:53 am
content: Look for a Schottky signal diode.
Can you ID these (Fluke?) test probes? - Page 1
Forum section: electronics / general

author: icon
author_rank: Regular Contributor
timestamp: May 04, 2012, 11:39:13 am
content: HiI just acquired a Fluke 87v second-hand but new (boxed, manual still shrink-wrapped, all paperwork, CD, etc) in the UK. It came with a sealed bag containing a Fluke-branded thermocouple and the probes/clips in the pictures below. The probes have a sprung-loaded retracting shroud, and they unscrew to reveal a 500mA fuse. You can replace the probe with a gnarly-looking alligator clip, or you can slide a (Fluke-branded) small alligator clip over the probe. The probes themselves have no model number/branding.My question is - what model number are these probes? I asked Fluke UK what probes were being shipped with 87v/EUR meters, and they couldn't give me a sensible answer. I'm planning on selling them - they're as much use to me as a crowbar for mending watches - but I'd like to give them a proper name.CheersJohn

author: G7PSK
author_rank: Super Contributor
timestamp: May 04, 2012, 05:21:33 pm
content: I don't know what the model number of those test leads are but the look very useful to me.

author: chrome
author_rank: Regular Contributor
timestamp: May 04, 2012, 06:46:59 pm
content: I think only the shrouded alligator clip is from fluke, the rest doesn't seem to have the right color and general quality that fluke uses.

author: ModemHead
author_rank: Frequent Contributor
timestamp: May 04, 2012, 07:02:05 pm
content: Looks likeTLK291 fused probes. Never actually seen those before. Grainger says country of origin is China. That may explain the "look." The small clips are regular old AC72.

author: icon
author_rank: Regular Contributor
timestamp: May 04, 2012, 09:23:52 pm
content: Quote from: ModemHead on May 04, 2012, 07:02:05 pmYes! They look very similar to mine, except mine are on a regular lead with a conventional 90deg shrouded 4mm plug. Thanks.John

author: ModemHead
author_rank: Frequent Contributor
timestamp: May 04, 2012, 09:57:54 pm
content: Interesting design. I've only seen the big fat fused probes before. FTPL or something like that.Does the shroud around the tip slide back somehow?

author: icon
author_rank: Regular Contributor
timestamp: May 04, 2012, 10:40:57 pm
content: Quote from: ModemHead on May 04, 2012, 09:57:54 pmYes, they're sprung-loaded and just telescope back into the body of the probe.John

author: icon
author_rank: Regular Contributor
timestamp: May 05, 2012, 05:24:58 pm
content: Having had a poke around on the Internet, it seems the UK has this guidancehttp://www.hse.gov.uk/pubns/priced/gs38.pdfwhich recommends the use of probes of this type, which presumably explains Fluke substituting them in this country.John
A sign of drinks of the future? - Page 1
Forum section: electronics / general

author: vxp036000
author_rank: Regular Contributor
timestamp: May 04, 2012, 01:53:35 am
content: I wish I had invented this!http://www.shortlist.com/cool-stuff/gadgets/the-spray-that-gets-you-instantly-drunk

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: May 04, 2012, 03:53:29 am
content: I wonder how easy it is to get alcohol poisoning from this? I'm sure this product will cease to exist after the first few hospitalisation incidents.

author: free_electron
author_rank: Super Contributor
timestamp: May 04, 2012, 04:38:41 am
content: Nah, it doesn't beat a pan-galactic gargle blaster ....42 is all you get as an answer. it should suffice...

author: SeanB
author_rank: Super Contributor
timestamp: May 04, 2012, 06:36:55 pm
content: I remember ( vaguely) making some. Involved dry ice, asprin and some coloured drinks and 196 proof ethanol. Somewhere I remember a gold brick, but it is all hazy at that point.

author: free_electron
author_rank: Super Contributor
timestamp: May 04, 2012, 09:05:11 pm
content: slice of lemon wrapped around a large gold brick...

author: Zero999
author_rank: Super Contributor
timestamp: May 05, 2012, 09:33:05 am
content: It works because the alcohol is inhaled, rather than ingested, so is sent to the brain very quickly. I've done this before by accident. I was making brandy sauce in the microwave. I added a load of brandy, boiled the sauce, took it out of the microwave, took a sniff and got drunk pretty quickly but sobered up soon after.

author: siliconmix
author_rank: Frequent Contributor
timestamp: May 05, 2012, 03:17:07 pm
content: the petrol sniffers of this world have already beat them too it.there's one who live down the road from me.he's always complaining about the price of fuel.i told him not to keep the lid off for too long.
Vintage Ericsson GF768: a video tour - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: May 03, 2012, 11:08:20 pm
content: Hello. I have just repaired an Ericsson GF768 mobile phone. This model is beautiful, and was released in 1997 - STILL going strong (how much of today's junk mobile phones would last that long?).I made a short video; excuse LOUD audio and mic hum (resolving these issues for subsequent videos):
Substitution of an inverter IC: are they critical? - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: May 04, 2012, 02:56:26 pm
content: Hi there. I am building a parallel port flashing dongle for some old Nokia 5110/6150 phones, and on the schematic it specifies a "74HC14" hex inverter IC, but I have none, but DO have some other 74 series hex inverter (can't remember the number right now). I just wondered if you think it would be critical to get the specified model, at LPT port speeds?Schematic:Kind regards, Matt.

author: slateraptor
author_rank: Frequent Contributor
timestamp: May 04, 2012, 03:09:26 pm
content: If the substitute device is HC or better, and based on the evidently simplistic design, I don't see any reason why there should be an issue.

author: firewalker
author_rank: Super Contributor
timestamp: May 04, 2012, 03:17:01 pm
content: HC - High speed CMOS, similar performance to LS, 12 nS.Alexander.

author: graynomad
author_rank: Regular Contributor
timestamp: May 05, 2012, 03:26:29 pm
content: The '14 is a Schmitt trigger, it will be more noise immune than say an '04. I doubt this will affect this application though.______Rob
Cutting square holes for instruments.. - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: May 03, 2012, 07:28:34 pm
content: I`m building a variac, variable AC transformer.I got to have some instruments, V and A to read output. Cutting the holes in a plastic box, fitting the instruments, switches, fuse and contacts requires a lot of work. I use a Fein Multimaster multicutter. Using it just in my hands was no easy task. Its easy to slip and destroy the box. Accuracy with the vibrating tool is difficult.So I modified a drill stand, with a metal cutout, the white peace in the pictures, to hold the Fein Multimaster steady. The cutter now is easy and very accurate to use, cutting out the holes without any problems. Different sizes of blades make even small holes easy and fast to cut even I aluminum boxes.When I was at it, I also put (welded) a large plastic handle to the Allen screw that adjust the height of the rigg, easier to adjust without a loos Allen tool. That was the only modification to the drill stand, leaving it usefull with a drill later on.Hope that it can be usefull to somebody else..How a multicutter works ? You may ask..Another project similar to mine..http://www.mzentertainment.com/studio_workshop_test_equipment_variac.html
Flying µCurrent - Page 1
Forum section: electronics / general

author: westfeild
author_rank: Contributor
timestamp: May 02, 2012, 03:59:58 pm
content: As i was posting on another subject i thought i would just mention this.Dave posted my µCurrent out on 26/04/12 and it arrived here in the UK on 30/04/12, fastest international delivery i have had. China previously held the record at 6 days and USA held the record for the slowest at 22 days.Thanks Dave.

author: T4P
author_rank: Super Contributor
timestamp: May 02, 2012, 07:12:01 pm
content: China has been pretty quick for me sometimes , i had them send my bag of 100 LED's and it turned up within 5 days .They reallyfly

author: westfeild
author_rank: Contributor
timestamp: May 02, 2012, 07:17:33 pm
content: Fortunately I have had only good experiences when ordering from Chine to UK with no lost items and all within 6 to 10 days. I don't no why but this was my first order from Australlia and was expecting it to take far longer than it did

author: T4P
author_rank: Super Contributor
timestamp: May 02, 2012, 08:35:32 pm
content: Quote from: westfeild on May 02, 2012, 07:17:33 pmWell it's further and i have had to wait a month for something from china .Shit happens

author: EEVblog
author_rank: Unknown
timestamp: May 02, 2012, 10:34:12 pm
content: In Australia we used to get packages from Hong Kong in 2 days or so. I've had next day on numerous occasions!Then something went horribly wrong with the whole cargo security business (guess who's to blame for starting that...) and it now takes 2 weeks minimum, usually more.I now avoid buying anything from Hong Kong on ebay. China is a bit better, but we are still talking 1-2 weeks minimum.Dave.

author: Andy
author_rank: Contributor
timestamp: May 03, 2012, 12:35:04 pm
content: I got my uCurrent next day. Though I do live only a couple of suburbs away...

author: T4P
author_rank: Super Contributor
timestamp: May 03, 2012, 02:02:52 pm
content: Well, China's security system has gone mad now ... i recieved my HKMail package in 4 days earlier then my CNMail when the companies shipped out at the same time .Hmm.
nothing on my analogue meter - Page 1
Forum section: electronics / general

author: Mint.
author_rank: Frequent Contributor
timestamp: May 02, 2012, 10:02:01 am
content: Why should we care about this so called "dirty" electricity?

author: Pentium100
author_rank: Frequent Contributor
timestamp: May 02, 2012, 10:08:20 am
content: So, he's 0.8V above ground, so what? Yes, the body acts like a big antenna, absorbs some EM fields and produces electricity. This is why amplifiers hum when you touch the input (or why the thyratron in my device was triggered when anybody touched the door handle).Still, "so what?"

author: siliconmix
author_rank: Frequent Contributor
timestamp: May 02, 2012, 11:36:49 am
content: can anyone explain why it went up when he went upstairs ? if this isn't trickery

author: Mint.
author_rank: Frequent Contributor
timestamp: May 02, 2012, 11:38:50 am
content: Quote from: siliconmix on May 02, 2012, 11:36:49 amCloser to power lines?

author: siliconmix
author_rank: Frequent Contributor
timestamp: May 02, 2012, 11:41:15 am
content: could be.perhaps i'll mail him and ask him to do it on his roof

author: G7PSK
author_rank: Super Contributor
timestamp: May 03, 2012, 12:28:48 pm
content: Has he not heard of bio electricity. The body produces electricity and so does all life get 2 iron plates and cover them with cow shit and connect that to his meter, it will give over half a volt. A couple in series will work a small motor.
Earth grounding for dummies - Page 1
Forum section: electronics / general

author: kj5cn
author_rank: Contributor
timestamp: May 03, 2012, 03:21:26 am
content: This is how you do it when the real Earth is too far to get to...

author: Spawn
author_rank: Frequent Contributor
timestamp: May 03, 2012, 03:48:51 am
content: He could at least fill the bucket

author: jahonen
author_rank: Super Contributor
timestamp: May 03, 2012, 06:33:28 am
content: That could be only viable method of earthing when installation is in the future in the Moon or MarsThe earth wire would be impractically long otherwise.Regards,Janne

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 03, 2012, 07:41:20 am
content: thats why your daddy asked you to go to school, so you wont be in farming business.

author: G7PSK
author_rank: Super Contributor
timestamp: May 03, 2012, 09:35:13 am
content: He might be safe as long as that bar keeps resting on the rails, but if the rails are not grounded there will be some interesting dancing by some one when they attempt to climb the stairs. The usual practice with those small alternator sets is that both leads are live on the socket so there is no neutral otherwise the whole machine would be live at all times.
OWON SDS7102V problem with "VECTOR" plots when in X/Y mode (YOUSCOPE) - Page 1
Forum section: electronics / general

author: pullin-gs
author_rank: Regular Contributor
timestamp: May 01, 2012, 11:52:16 am
content: I loaded up my netbook with the YOUSCOPE.WAV file and played it through my SDS7102V last night.It actually looks really good. Excellent considering the wave source is just a netbook.Fast refresh and sharp imaging.That said the image is made up of thousands of plotted pixels.Pixels not in the sense of the individual LCD pixels...all plots are pixel based. I realize that.Pixels in the sense of lit plotted points with dark-space between each plotted point.Observation (problem?): When I turn on vector mode, the dots are not connected. There is no difference.However when scope is not in X/Y mode, "vector" enabled plots display as expected.Also, "persistance" is not a configurable option with X/Y mode. It is set to off and can not be changed.Side-benifit: The retraces that are captured on the better digital scopes are not as pronounced.

author: T4P
author_rank: Super Contributor
timestamp: May 01, 2012, 01:16:18 pm
content: Quote from: pullin-gs on May 01, 2012, 11:52:16 am"Better" as in what ?The agilent scope is far too fast ...

author: pullin-gs
author_rank: Regular Contributor
timestamp: May 01, 2012, 04:19:08 pm
content: "better as in far to fast"Not trying to start a ford/vs/chevy argument. The Agilent is far better."Better" is relative to the topic at hand (no vector plots).The slower scope does not have pronounced re-scans because the sample rates are low enough to miss them when only plotting (and not vectoring between points when I selected it to do so).Now, back to the topic at hand: Do you have an answer for my observation?

author: T4P
author_rank: Super Contributor
timestamp: May 01, 2012, 05:27:35 pm
content: Quote from: pullin-gs on May 01, 2012, 04:19:08 pmI don't . Err ... you mean 2Gigsamples ? You mean 2 Gigsamples will not miss if you say 1Gigsamples miss them ... err eh ?

author: pullin-gs
author_rank: Regular Contributor
timestamp: May 01, 2012, 06:40:58 pm
content: Quote from: Dave.S on May 01, 2012, 05:27:35 pmDave,YOU WIN (again).Now back on topic, do you have anything to contribute to the topic of the thread?Anything at all?

author: T4P
author_rank: Super Contributor
timestamp: May 01, 2012, 06:47:09 pm
content: Quote from: pullin-gs on May 01, 2012, 06:40:58 pmOf course i don't have anything . Sorry about that
A true Dilbert moment - Page 1
Forum section: electronics / general

author: charliehorse55
author_rank: Contributor
timestamp: May 01, 2012, 04:21:40 am
content: Dilbert moment: man is hired, no idea what he is supposed to do.http://www.reddit.com/r/AskReddit/comments/szuv7/i_have_a_job_but_i_dont_know_what_im_supposed_to/I have never heard of an interpersonal engineer, does anyone know what this means?

author: johnboxall
author_rank: Unknown
timestamp: May 01, 2012, 01:25:51 pm
content: Quote from: charliehorse55 on May 01, 2012, 04:21:40 amMight be the guy that deals with engineers so that the customers don't have to...

author: olsenn
author_rank: Frequent Contributor
timestamp: May 01, 2012, 01:45:16 pm
content: QuoteI can actually relate to this guy's problem... I am at work right now and browsing through EEVBlog forums and reading dilbert comics because I have no work I'm supposed to be doing and nobody here knows that I have no work or what work to give me even if they did. Kids, this is why you get an education... so you can get a job where your superiors just plain trust you!

author: sacherjj
author_rank: Frequent Contributor
timestamp: May 01, 2012, 03:44:45 pm
content: Quote from: tronixstuff on May 01, 2012, 01:25:51 pmHe must have people skills...

author: SeanB
author_rank: Super Contributor
timestamp: May 01, 2012, 04:16:37 pm
content: Interpersonla engineer - the guy who understands the PHB and who can explain Dilbert to him, and vice versa. Can also translate Wally and Asok to PHB in a way that the PHB can vaguely understand.Me, I am neither, more like the guy in the other cubicle..............

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 01, 2012, 04:53:38 pm
content: if you are just fresh graduate, dont apply a job in consultancy firm, esp if you have never work in contracting job/firm and you are/will be asked to supervise a contract job. trust me i know! i've been in dilbert moment for 3/2 years long time ago. the way i understand it... interpersonal engineer = you got to be very good at making joke no matter how stressfull situation your mate engineer is currently in.

author: Kremmen
author_rank: Super Contributor
timestamp: May 01, 2012, 05:07:50 pm
content: To me it looks like in the English speaking world anything can be "engineering" and anyone can be this-or-that engineer, rendering both words essentially meaningless. I mean if anyone, anyone at all, can decide that something is "engineering" then the word ceases to signify anything in particular.Interpersonal engineer? Please... The job may be a valid one but "engineer" it would never be around here.
Agilent E5071B VNA Fixture simulation - Page 1
Forum section: electronics / general

author: steaky1212
author_rank: Regular Contributor
timestamp: May 01, 2012, 09:35:36 am
content: Hey,So on the off-chance that someone knows what I'm talking about, lets get started...I've got a differential signal path that I want to measure the return loss of, and typically I would use a balun on a single port on my VNA.The balun method has been appropriate for a number of years, and typically corresponds to figures that I expect to receive.I am looking at performing some single-ended measurements, then doing a load of matrix manipulation to derive the mixed mode performance - or use the VNA's built in fixture simulation. This way I can easily obtain common-mode values for my differential pair.My issue is that the single-ended method gives worse return loss measurements - and I am out of ideas as to why.Does anyone have any experience dealing with a similar issue?Thanks in advance,Steaky
Electrolytic capacitor replacement - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: April 29, 2012, 05:49:07 pm
content: Hi I have a 1970's vintage oscilloscope with an electrolytic that has started to bubble around the rubber seal. The capacitor appears to be the output for the external saw tooth signal. The scope works still I just found this when cleaning out the dust. My problem is the capacitor is 400 micro farad at 16 volt the only spares I have on hand are a 470 that measures 538 or 4 X 100 that measure between 105 and 118 all at 25 Volt rating, do I replace with the one or stick the four in or would it be better to source one at 400 and wait a week.

author: Unknown
author_rank: Unknown
timestamp: April 29, 2012, 06:06:14 pm
content: If it's an aluminum electrolytic, then exact value is unlikely to matter. These caps usually have huge tolerances and temperature coefficients. I would expect a 470 uF cap with the same or larger voltage rating to work just fine. If it's involved in the saw tooth circuit, I would expect it to be used for AC coupling the signal. Using an aluminum electrolytic as timing cap would give a very unstable time base.
Safety, Engineering and Construction  -   NOT - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: April 27, 2012, 09:51:42 pm
content: Some

author: G7PSK
author_rank: Super Contributor
timestamp: April 28, 2012, 08:44:54 am
content: Here is a sign that my wife's nephew found in New Zealand.

author: G7PSK
author_rank: Super Contributor
timestamp: April 28, 2012, 09:17:51 am
content: Or personal player in Zimbabwe.

author: SeanB
author_rank: Super Contributor
timestamp: April 28, 2012, 12:22:55 pm
content: Lasts longer than any primary cell, and can be charged many times in it's lifetime. Plus it is almost totally recyclable, as it has scrap value of $5. What else do you do in a rural area where there is no power, and no likelihood of lines being laid in your grandchild's lifetime. If you are a little better off you will have bought a black and white 12v TV set as well.

author: G7PSK
author_rank: Super Contributor
timestamp: April 28, 2012, 02:54:18 pm
content: Tv takes more power, that needs a bigger battery and would require two people one with large battery on head the other with a TV on his, with a possibly of third person to carry pole with antennae.

author: SeanB
author_rank: Super Contributor
timestamp: April 28, 2012, 03:04:15 pm
content: Most popular B&W TV set here is $30 or so, and fits in the hand, using a tiny 5 inch crt. Runs for days on a car battery before it will not run it.

author: caroper
author_rank: Regular Contributor
timestamp: April 28, 2012, 05:03:23 pm
content: Quote from: G7PSK on April 28, 2012, 02:54:18 pmWhy do you think we are allowed more than one wife

author: Lightages
author_rank: Unknown
timestamp: April 28, 2012, 07:22:49 pm
content: Quote from: ErikTheNorwegian on April 27, 2012, 09:51:42 pmThis may be an understatement. Some people might not want to see human after he has been crushed under the tracks of an excavator. You might want to make your warning a little more explicit.

author: IanB
author_rank: Super Contributor
timestamp: April 28, 2012, 08:19:06 pm
content: Quote from: Lightages on April 28, 2012, 07:22:49 pmEr...that was a mannequin. A real human would be squished.

author: sonicj
author_rank: Frequent Contributor
timestamp: April 29, 2012, 12:04:21 am
content: Quote from: SeanB on April 28, 2012, 12:22:55 pmi would enjoy the silence before i walked around with a 40lb lead aid battery on my head.-sj

author: SeanB
author_rank: Super Contributor
timestamp: April 29, 2012, 09:19:15 am
content: Quote from: caroper on April 28, 2012, 05:03:23 pmUp to 4 if you pay the Lobola.............That enables you to have a satellite receiver and dish as well.
nyle steiner good bloke - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 29, 2012, 09:17:17 am
content: https://www.youtube.com/user/nylesteiner

author: Mint.
author_rank: Frequent Contributor
timestamp: April 29, 2012, 10:07:10 am
content: Yeah not bad, a variety of videos.
Makes Me Want to Do Homework - Page 1
Forum section: electronics / general

author: olsenn
author_rank: Frequent Contributor
timestamp: April 26, 2012, 09:35:50 pm
content: ** Image removed **upload pictures

author: Unknown
author_rank: Unknown
timestamp: April 26, 2012, 10:36:50 pm
content: Hmm...what is going on on the right butt-cheek?And how the hell am I supposed to know whether or not it will work without component values?

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 27, 2012, 01:27:50 am
content: i will for you, calculate/analyze how much the current sink and/or source capability of the butthole, and how much BW it can take (i'm guessing 1-10Hz)Quotesimple, you just measure real life value, and mostly in cm/inches unit that matter most.

author: Psi
author_rank: Super Contributor
timestamp: April 27, 2012, 03:18:34 am
content: Sigh,This thread isn't going to last long.Probably more due to comments than the image itself.Can we try to keep the comments from exceeding an R16 rating.

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 27, 2012, 06:12:10 am
content: Quotethe picture is R16 rating. what do you expect from that picture? a serious transmission line discussion? alas, i find the picture is not that entertaining.

author: IanB
author_rank: Super Contributor
timestamp: April 27, 2012, 06:18:50 am
content: Quote from: Mechatrommer on April 27, 2012, 06:12:10 amDon't be silly. There is nothing unsuitable in that picture for a child of any age. The comments are another story...

author: PeterG
author_rank: Frequent Contributor
timestamp: April 27, 2012, 06:29:50 am
content: I think this is about as raunchy as any topic is going to get on this forum........excluding Geek Toy Porn of coarse.Regards

author: Psi
author_rank: Super Contributor
timestamp: April 27, 2012, 07:21:35 am
content: Quote from: IanB on April 27, 2012, 06:18:50 amYeah, i completely agree.

author: carloscuev
author_rank: Regular Contributor
timestamp: April 27, 2012, 07:41:43 am
content: haha! Busted !

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: April 27, 2012, 09:26:12 am
content: Damn. What did I miss?

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 27, 2012, 11:07:30 am
content: Quote from: Psi on April 27, 2012, 07:21:35 amright i agree.i was wrong. but i also agree, my previous post is not r16 either

author: MikeK
author_rank: Super Contributor
timestamp: April 27, 2012, 07:02:31 pm
content: Quote from: IanB on April 27, 2012, 06:18:50 amBut the children might see the buttocks of another member of its species! The horror!
µCurrent Photos - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: April 28, 2012, 03:28:53 am
content: Thought some may be interested in this.Energy Micro checked their µCurrent against their Agilent on an Gecko micro in shutdown mode:https://www.facebook.com/photo.php?fbid=211240178991914&set=a.187038444745421.40809.177228589059740&type=3&theaterDave.

author: steve_w
author_rank: Regular Contributor
timestamp: April 28, 2012, 03:57:02 am
content: one is minus one is plus; why is that?Steve W

author: EEVblog
author_rank: Unknown
timestamp: April 28, 2012, 04:02:13 am
content: Quote from: steve_w on April 28, 2012, 03:57:02 amThe leads are swapped.Dave.

author: Chet T16
author_rank: Frequent Contributor
timestamp: April 28, 2012, 08:28:02 am
content: I suppose that is acceptable

author: george graves
author_rank: Super Contributor
timestamp: April 28, 2012, 11:35:05 am
content: So it's -100% off? That is unacceptable!(but really - nice work dave!)
Why Hasn't someone thought of this before? - Page 1
Forum section: electronics / general

author: FreeThinker
author_rank: Frequent Contributor
timestamp: April 27, 2012, 04:04:45 pm
content: This seems like a great idea. Might make a nice feature on the AmpHour. What do you think Dave?http://www.elektor.com/news/a-rat-s-nest-less-workspace-clean-with-plenty-of.2148125.lynkx?utm_source=UK&utm_medium=email&utm_campaign=news&cat=elektorLol, I'd slap a writ on them for breach of copyright.... Bloody Cheek.

author: codeboy2k
author_rank: Super Contributor
timestamp: April 28, 2012, 12:53:18 am
content: Quote from: FreeThinker on April 27, 2012, 04:04:45 pmhuh? I don't get it. What's the point of your post? send in pictures of your lab? I think there was a thread with thatalready. Is it the clean workspace? or plenty of screens?By the way, that popup on the Elektor site had to have been no bigger than my smartphone screen (320x240).And they had--> 2 <--bloody pictures squeezed top and bottom into that one micro-sized popup.sheesh!

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 28, 2012, 01:15:26 am
content: Quote from: codeboy2k on April 28, 2012, 12:53:18 amthe possible odd is... it is them who got the idea from eevblog, but not the other way...https://www.eevblog.com/forum/general-chat/whats-your-work-benchlab-look-like-post-some-pictures-of-your-lab/

author: FreeThinker
author_rank: Frequent Contributor
timestamp: April 28, 2012, 06:53:53 am
content: Check out Daves Alter Ego 'The Amphour' They have had a workbench of the week for sometime,Elektor is clearly trying to muscle in.
PICKit 3 & 24F08KA101 issues... pinout confusion - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: April 27, 2012, 02:56:40 pm
content: Hi there. I have PICKit 3 and am trying to wire up a 24F08KA101 to program it. On the data sheet it mentions "PGD" and "PGC" pins, which were fine on my old 16f628... but on this PIC it has PGD1, PGD2 & PGC3... and PGC1, PGC2 & PGC3. Which do I use? N00b alert! Helpppp!Thanks guys!

author: deephaven
author_rank: Frequent Contributor
timestamp: April 27, 2012, 03:39:53 pm
content: I have to admit to not using a PIC with multiple programming pins. I did a scan of the forums and it appears that you can use any pair you like for programming, initially it will look at all three pairs of pins. If you then want to dedicate a pair, you can set a couple of bits in the configuration register to tell the PIC to only use one specific pair of pins.

author: Rufus
author_rank: Super Contributor
timestamp: April 27, 2012, 04:41:04 pm
content: Any pair of PGC/PGD pins can be used to program the part (check device errata to make sure all pairs actually work). The processor configuration words define which pair will be used for in circuit debug.
Why is setting up "HI-TECH" C compiler in MPLAB such a headache? - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: April 27, 2012, 09:56:56 pm
content: Why is setting up "HI-TECH" C compiler in MPLAB such a headache?I have a licence, have activated the HI-TECH compiler, but what a faff about trying to point MPLAB to it. All I see is red crosses all the way, and some nonsense about drivers not being available for a PIC.Electronics is simple, as it's based on physics - natural laws - they don't change at all, and a circuit is pretty predictable. Suddenly when you involve code and programming, along with geeks, it all becomes a horrendously buggy mess... a total ball ache! Please, would someone explain how to setup MPLAB and HI-TECH compiler on Win7 x64, so I can actually build *physical* circuits and not piss about in the land of virtual objects, code, bugs and all that fluff.Thanks guys - just annoyed how much of a faff this all is.

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: April 28, 2012, 06:28:26 pm
content: Hi..this tread is about same problem..http://forum.htsoft.com/all/showflat.php/Cat/0/Number/35432/Main/32092and try this book.. (PDF)..http://www.ee.bgu.ac.il/~microlab/MicroLab/PicDoc/manual.pdf

author: icon
author_rank: Regular Contributor
timestamp: April 28, 2012, 07:11:08 pm
content: Hmm. I Just started using Hitech C a couple of days ago. MPLAB 8.84, Win7 x64. I used ASM for a while, and then decided to try C. I couldn't figure out how get it to work with C, so I watched a laborious Microchip video which boiled down to - Project>Project Wizard. At Step 2, drop down the 'Active Toolsuite' box and pick 'HiTech Universal Toolsuite'. So I did, and there it was.I seem to recall the video saying that this Universal Toolsuite contained the components necessary to integrate with MPLAB - it could be installed and upgraded independently of the compiler. Maybe your installation doesn't have those bits, for some reason?Anyway, the behaviour your seeing is not normal, though that's no great consolation.RegardsJohn
Results from 2011 PE exam - Page 1
Forum section: electronics / general

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 24, 2012, 01:09:10 am
content: http://www.todaysengineer.org/2012/Apr/licensure.asp61% pass rate for first-timers; 27% for repeats...evidently, prospects are still looking quite abysmal. I would have thought the better segmentation of specializations would make the exam a lot more manageable. Subject matter forelectrical and electronicsseems very fair.For the sake of completeness, subject matters forcomputer engineeringandpowerspecializations. I would def get owned on the power exam.

author: Ajahn Lambda
author_rank: Regular Contributor
timestamp: April 25, 2012, 12:21:03 am
content: I amsotempted to attempt this exam....What fees are involved with it? I haven't looked at this stuff in quite some time.

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 25, 2012, 01:00:45 am
content: The state administers the exam, so it varies, e.g.fee for Floridais $230 for first-time takers after satisfying other requires, including passing the FE and 4 years industry experience, typically under the supervision of a qualified PE.For Michigan, engineer licensing board website ishere; you'll have to dabble a bit to find how much it'll actually run you. You can also browse the NCEES licensing boards list by statehere.I haven't even taken the FE, let alone satisfy the 4-year experience requirement, so this is all researched info.Have you passed the FE yet? If so, what's it like? My cousin (civil engineer type) passed 2 years ago and said it was cake...but then again, rumor has it that the civil curriculum is quite the "a little bit of this, a little bit of that" affair. Their FE pass rates are 12% higher than EEs at any rate.

author: Ajahn Lambda
author_rank: Regular Contributor
timestamp: April 26, 2012, 03:50:49 am
content: Hey thanks for that info!I've not takenanyexams yet. I've had the idea of taking the PE exams in the back of my mind for a number of years. During my junior year of EE, I was in a group project in which our advisor was a PE (specializing in embedded systems), and I was somewhat 'bedazzled' by how he could pick up and leave jobs and contract work as he pleased. Jealousy of a pirate's life, right? I'd have to brush up on virtually everything covered to have a chance passing, I'm sad to say; besides that, I don't have the industry requirements, either. Looks like I'll have to save my pennies so I can return to university some day.Ah, but to be qualified and able to do contract work....
SEMICON Singapore 2012 (!)  - Page 1
Forum section: electronics / general

author: T4P
author_rank: Super Contributor
timestamp: April 24, 2012, 04:20:05 pm
content: Fantastic ! I'll be there tomorrow .http://www.semiconsingapore.org/

author: vk6zgo
author_rank: Super Contributor
timestamp: April 25, 2012, 12:01:21 pm
content: Have fun!
Transistorized, mag-core/diode logic Calculator - Page 1
Forum section: electronics / general

author: pullin-gs
author_rank: Regular Contributor
timestamp: April 20, 2012, 03:00:57 am
content: Show us your vintage work.Tubes/transistors is how I started in this hobby.This was a bear to restore.500+ transistors, 1000+diodes, gobs of 40-year old capacitors.Nixie-tube display, core-memory registers.Not a single chip or in-line component assemblies.It dims the lights when I power it up (seriously!).

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 23, 2012, 10:29:34 am
content: that's a ton of work to put in.what are you going to do with it .collect or sell .?

author: Unknown
author_rank: Unknown
timestamp: April 23, 2012, 11:48:11 am
content: What a beauty! I love how it thinks before giving an answer

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 23, 2012, 12:16:16 pm
content: Well I'll be damned...your Wang calculator implements RPN.

author: Pentium100
author_rank: Frequent Contributor
timestamp: April 23, 2012, 09:25:35 pm
content: Nice. I usually buy old equipment that is working. I guess the most "restoration" I had to do was to solder in all the crystal oscillators in a motherboard with a 286 CPU (somebody took them out before giving the board to me). Now I only need to find a case that can fit a full size AT board. Most of the time it's just a bad capacitor or belt somewhere.I am not against buying a broken device and fixing it (that's how I got my Marantz PMD-430 portable cassette deck, couldn't afford a working one), but it seems that people usually throw them out instead of trying to sell.