hybridfree/eevblog-posts huggingface dataset:
Cartesian to Polar Math - Page 1
Forum section: electronics / general

author: lgbeno
author_rank: Frequent Contributor
timestamp: January 10, 2015, 08:58:41 pm
content: Ok I think this is possible and if I sat and thought about it long enough I would probably come up with a solution but I'm sure that the collective genious that is EEVBLOG forum users can come up with the method faster.So I have a spinning magnet in proximity to a MAG3110 magnetometer. As you would assume, it measures magnetic filed in Cartesian values x,y,z. I would like to take these Cartesian values and calculate the vector of the axis of the spinning magnet, current angle of the field about that vector and possible the magnitude of the field.Thoughts?

author: skipjackrc4
author_rank: Regular Contributor
timestamp: January 10, 2015, 10:44:40 pm
content: I'm thinking you probably want spherical coordinates instead of polar, since you're operating in 3D space.This particular coordinate conversion is quite simple. Just follow the equations on the wiki page:http://en.wikipedia.org/wiki/Spherical_coordinate_system

author: LukeW
author_rank: Frequent Contributor
timestamp: January 11, 2015, 02:35:42 am
content: If you're trying to sense angular position or rotation with a non-contact device, there are magnetic sensors specifically designed to do this job.

author: lgbeno
author_rank: Frequent Contributor
timestamp: January 11, 2015, 02:40:42 am
content: Thanks for the responses, I agree with the comment on spherical coordinates, that gets me partially there except I'm thinking of changing the origin location an orientation of the axis to be centered about the axis of rotation.About the mag rotation chips, I'm aware these exist except they are not sensitive enough for the distance I need to be away from the magnet.The more I think about it, exactly what I want might not be possible unless I place the origin of my sensor somewhere on that axis of rotation
Upcoming Intro to Systems Engineering course on Coursera - Page 1
Forum section: electronics / general

author: manticore00
author_rank: Regular Contributor
timestamp: January 10, 2014, 08:28:28 pm
content: I came across this upcoming course on Coursera starting in April and I thought others might be interested as well:https://www.coursera.org/course/introseBelow is the course description from the site:About the CourseSystems engineering is an interdisciplinary approach to design, implementation and evaluation that holds the key to the successful development of complex human-made systems. This course explores a framework encapsulating the entire systems engineering discipline, clearly showing where the multitude of associated activities fits within the overall effort and how the activities relate to one another. Systems engineering is a very broad discipline, so we also discuss how the concepts and procedures could be applied to individual projects. A new theme will be explored each week using presentations to introduce and synthesise key concepts, examples to simulate authentic contexts, and structured activities to guide your learning.The course is relevant to all professions associated with the introduction of complex human-made systems: project managers, engineers, quality assurance representatives, integrated logistic support practitioners, operators, managers, maintainers, and so on, from students to professionals, from novices to experienced practitioners, from technical to non-technical people.

author: BBQ
author_rank: Regular Contributor
timestamp: January 10, 2014, 10:37:47 pm
content: I signed up. We're gonna have a good time.

author: BBQ
author_rank: Regular Contributor
timestamp: January 10, 2015, 02:39:53 pm
content: Has anyone attended this course? Was it any good? I didn't, and i'm afraid OP won't be able to answer me. But it is starting again in a few months.

author: Rasz
author_rank: Super Contributor
timestamp: January 10, 2015, 03:38:56 pm
content: I signed up, but there was some problem with logging in, basically some unis on coursera are dicks and will lock you out of a course if you miss accepting Honor Code within couple of days of course start. Cant even access course archive nowI download all my courses usinghttps://github.com/coursera-dl/coursera, this one refused to cooperate :/
3D Printing services in Australia - Page 1
Forum section: electronics / general

author: aargee
author_rank: Frequent Contributor
timestamp: January 05, 2015, 02:36:15 am
content: Hi all,I'm wondering if there is a cost effective, reasonable quality, 3D printing service in Australia. I just want to get one part printed (lens holder for a Flir E4).or - if there are any overseas services that work well from here.- Rob.

author: zapta
author_rank: Super Contributor
timestamp: January 06, 2015, 03:53:59 am
content: Quote from: aargee on January 05, 2015, 02:36:15 amCan you post the STL file or share a link to the hack?

author: aargee
author_rank: Frequent Contributor
timestamp: January 06, 2015, 06:26:06 am
content: Post 1488 ...https://www.eevblog.com/forum/testgear/flir-e4-thermal-imaging-camera-teardown/1488/?topicseen

author: zapta
author_rank: Super Contributor
timestamp: January 07, 2015, 05:31:39 am
content: Quote from: aargee on January 06, 2015, 06:26:06 amI printed it on my 3D printer and it looks crude but fits well my E4 (I don't have the lens yet, where can I get it?).If you don't find a local solution for printing, PM me your mailing address and I will mail you one. If you can find the latest STL file for the E4 focus tool I can mail it as well.

author: aargee
author_rank: Frequent Contributor
timestamp: January 08, 2015, 10:42:43 pm
content: Zapta,Thanks for the kind offer, I may end up hand crafting a solution yet. I'll let you know if I get desperate!I purchased this lens (20mm dia / 101mm or 4" focus):http://www.ebay.com.au/itm/261541512155?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649Postage time was good to Aus (about 2 weeks).I've held it up to the front of the E4 and looked at a PCB, works very well as a macro lens.

author: zapta
author_rank: Super Contributor
timestamp: January 09, 2015, 03:47:48 pm
content: Quote from: aargee on January 08, 2015, 10:42:43 pmThanks. I will order myself a lens.I also printed this designhttp://www.thingiverse.com/thing:407201, it's better IMO, more compact and fits the camera better.
Deoxit D5 alternative ?  - Page 1
Forum section: electronics / general

author: Flump
author_rank: Frequent Contributor
timestamp: January 10, 2015, 06:56:19 pm
content: I have a new Antenna Tuning Unit and every now and then the Roller Inductor needs cleaningand the manual states to use Deoxit D5 but thats quite expensive for someone i will only usenow and then so I wonder if there is a cheaper alternative ?Here is the manual for it, the very last section covers the cleaninghttp://www.palstar.com/en/product-manuals/manual_at2k.pdf

author: torr032
author_rank: Regular Contributor
timestamp: January 10, 2015, 08:54:47 pm
content: Use Teslanol T6.

author: babysitter
author_rank: Frequent Contributor
timestamp: January 10, 2015, 09:41:29 pm
content: Yes, Teslanol T6 seconded!If it is really heavy dirt, give it a run in the dishwasher.

author: nanofrog
author_rank: Super Contributor
timestamp: January 10, 2015, 09:44:26 pm
content: Might want to considerCramoline Contactacleanas well (originally called Cramolin Red).As it happens, this is similar, if not identical to the active compound in DeoxIT, which has an excellent reputation here in the US (story here).Conrad UK sells it:200ml spray can400ml spray can

author: Flump
author_rank: Frequent Contributor
timestamp: January 12, 2015, 01:14:19 pm
content: Hi babysitter, the tuner wont fit in my dishwasher but i have a jetwashThanks very much for the advice guys
Electronic bargain of the year.... - Page 1
Forum section: electronics / general

author: abaxas
author_rank: Regular Contributor
timestamp: January 20, 2015, 01:14:08 pm
content: http://www.aliexpress.com/item/Free-Shipping-TDA2003/2050603521.htmlnot...

author: Yago
author_rank: Frequent Contributor
timestamp: January 20, 2015, 01:46:38 pm
content: Data sheet includes free Dead-sea scroll!

author: Balaur
author_rank: Unknown
timestamp: January 20, 2015, 02:14:43 pm
content: Where is the rest of the boombox?

author: electr_peter
author_rank: Unknown
timestamp: January 20, 2015, 02:52:40 pm
content: Straight from the factory

author: Sparks
author_rank: Contributor
timestamp: January 20, 2015, 08:02:08 pm
content: not even in my junk drawer

author: edpalmer42
author_rank: Super Contributor
timestamp: January 20, 2015, 08:55:36 pm
content: Don't worry, that will buff out.

author: Len
author_rank: Frequent Contributor
timestamp: January 20, 2015, 09:26:07 pm
content: Quote from: Balaur on January 20, 2015, 02:14:43 pmIt's supposed to be a car audio amplifier...
Really strange SMPS design.  - Page 1
Forum section: electronics / general

author: electronics-whiz
author_rank: Regular Contributor
timestamp: January 05, 2015, 03:14:27 am
content: I took part a SMPS from a storage server from like 2003-04. It had some normal input part, then had the transistors, etc on a separate PCB n a heatsink. Normal SMPS transformer. seems to put out like 52V DC, then this ran 3 DC-DC converter units. 2 in parallel and another. Used 3 small fans to cool two for the SMPS, one for inverter. Seems like a rather inefficient, impractical setup for no real advantage.

author: coppice
author_rank: Super Contributor
timestamp: January 05, 2015, 03:19:46 am
content: A number of server supplies, especially in telecoms applications, are actually 2 supplies in one box. They convert the mains to -48V or so, to charge batteries. They then convert the -48V to the required voltages to run the server. Does your supply have external connections to the 52V section for batteries?

author: Howardlong
author_rank: Super Contributor
timestamp: January 05, 2015, 03:23:05 am
content: I was wondering whether it also had an option for PoE operation? That's 48V.

author: electronics-whiz
author_rank: Regular Contributor
timestamp: January 05, 2015, 03:33:41 am
content: I don't have docs, etc on it. It has a small connection that kooks like a ps/2, but more pins. Then another with two wires. All are small like 22-24 AWG. I doubt those could power it.This is from an old storage area network, I think these units were from the rack units that held all of the hard drives.

author: TerraHertz
author_rank: Super Contributor
timestamp: January 08, 2015, 09:39:04 am
content: As Coppice mentioned, a lot of telecom installations have a system supply of 48 to 50 VDC, which is generally battery backed.Maybe your unit was designed to have an option of operating in such environments, but wasn't actually configured for it?Why is it 50V or less? Because they wanted the highest possible voltage to overwhelm line resistance, and 50V is the highest voltage legally acceptable for live hands-on work on equipment.Why is it -48V and ground? Because that way the telephone land line wires are negative relative to the actual ground, and this helps prevent corrosion of the wires and junctions.
mosfet VS power mosfet VS transistor - Page 1
Forum section: electronics / general

author: electronics-whiz
author_rank: Regular Contributor
timestamp: January 06, 2015, 01:54:00 am
content: To me these words pretty much mean the same thing. Transistor, or heavy duty transistor. How do these devices differ if any compared to each other? Is their a certain place to use a certain one if they are different devices?

author: vk6zgo
author_rank: Super Contributor
timestamp: January 06, 2015, 02:17:19 am
content: Quote from: electronics-whiz on January 06, 2015, 01:54:00 amYounger people see "mosfet"& automatically think "high power",but this is not the case.A mosfet is not necessarily a high power device---many mosfets are low power devices used in radio receiver low level RF amplifiers.Of course,they are all generically,"transistors",but a "bi-junction" transistor operates in a completely different way to any "FET".High power devices of either kind are very different to low power ones.I suggest you look at other people's applications of these devices to get a "feel" for the occasions each device is the more appropriate.

author: coppice
author_rank: Super Contributor
timestamp: January 06, 2015, 10:51:38 am
content: Quote from: vk6zgo on January 06, 2015, 02:17:19 amReally? Isn't most young people's experience of MOSFETs of them being integrated by the billion onto the chips in their phones and computers?

author: dannyf
author_rank: Super Contributor
timestamp: January 06, 2015, 12:08:06 pm
content: QuoteThey are all transistors.QuoteThere are many small signal mosfets, far more so than small signal bjt.QuoteHard to make a generic statement.Small signal discrete mosfets tend to be RF types now. Most of them are designed for amplification.Small signal BJTs are more versatile.High powered mosfets tend to be for switching: they are faster and more resistant to thermal breakdown than bjts, and have lower switching losses -> up to a point. Beyond which, other devices, like IGBT, SCR/Triac, or plain old transistors take over.BJTs, even high powered ones, are used more for amplification.

author: vk6zgo
author_rank: Super Contributor
timestamp: January 07, 2015, 03:34:01 am
content: Quote from: coppice on January 06, 2015, 10:51:38 amThey usually don't know what is inside their "devices"& probably think it is some form of magic!

author: wraper
author_rank: Unknown
timestamp: January 07, 2015, 11:17:24 am
content: Quote from: coppice on January 06, 2015, 10:51:38 amIMO they read about them as million/billion transistor count in the chip, not as MOSFET. They read about MOSFETS in various motherboard reviews with some description of DC/DC converters on them.

author: theoldwizard1
author_rank: Regular Contributor
timestamp: January 07, 2015, 11:48:15 pm
content: Quote from: mojo-chan on January 07, 2015, 11:00:02 am+1 !There are some of us who remember when Darlinton transistors were the rage !
Cap replacement success - Page 1
Forum section: electronics / general

author: jjcazau
author_rank: Newbie
timestamp: January 07, 2015, 02:20:06 pm
content: My sisters tv remote broke and a new one costs $60 AUD so i decided to pull it apart. Observed some watery stuff inside and first though she got water in it but later i guess it might have been a blown capacitor. Pulled the old cap out 16v 100uf. $0.36c at Jaycar but its 11pm and i couldn't wait for the morning. Had a look around and saw an old pc. pulled the mobo and thought it was worth a try.1000uf, no, 10uf no, bingo 100uf 16v on the sound driver. and 3 of them to boot. de-soldered and whacked it in the remote. Took out the phone camera and BINGO the LED is flashing codes on button presses.This was my first true electronics diy fix. Thanks Dave for the great content i've learned from. Finally got an opportunity to apply the stuff i've seen in your videos. Saved me $60 by repairing it for free from junk, not too shabby.

author: tom66
author_rank: Super Contributor
timestamp: January 07, 2015, 02:48:44 pm
content: Surprised to see a bad capacitor cause issues on a remote. I would suspect a contact with the battery, a soldering issue, or even an intermittent LED... but the capacitor is really only there to smooth out the IR current peaks, which can cause the MCU to reset if the battery is low.

author: SeanB
author_rank: Super Contributor
timestamp: January 07, 2015, 03:10:20 pm
content: Bad cap means either no transmit, intermittent transmit or very poor battery life. The internal resistance of the battery changes up with age, and this affects the ability of the remote to drive the LED with the normal 1A plus current pulses. Dead cap means no transmit in many cases. Increasing the value to as large as you can fit in the case helps as well.

author: lapm
author_rank: Frequent Contributor
timestamp: January 07, 2015, 05:23:10 pm
content: I have restored so many remotes by replacing that cheap yellow resonator... Always have couple of those spare... People have tendency to drop those remotes sometimes and resonators seems not like that much...

author: lpc32
author_rank: Frequent Contributor
timestamp: January 07, 2015, 06:43:51 pm
content: Congrats.And... $60 for a remote?! If the need arises, this may do for 2.14 US$:http://www.ebay.com/itm/HOT-Portable-Universal-TV-Remote-Control-Controller-For-TV-Television-Sets-/251750135213?pt=US_Remote_Controls&hash=item3a9d7a35ad

author: kolonelkadat
author_rank: Regular Contributor
timestamp: January 07, 2015, 06:55:24 pm
content: Quote from: jjcazau on January 07, 2015, 02:20:06 pmi would have thought it was oil leaking out of the silicon button membrane. gratz on the fix in any case.
Teylers Museum, The Netherlands - Page 1
Forum section: electronics / general

author: dexters_lab
author_rank: Unknown
timestamp: January 06, 2015, 01:19:30 pm
content: was away in Amsterdam recently and after a recommendation from someone on here to visit the Teylers Museum we decided to go take a look as it's only a short train ride from Amsterdam.Unfortunately i did not take any video or stills as the museum had a no cameras, phones, bags policy so i respected that.The science collection is vast and varied, a lot of the instruments were commissioned by Teylers during the 18th and 19th century and were used in the same rooms they still stand.There are many electrical experiments which is what attracted my attention, the centerpeice of the instrument room is the largest electrostatic generator using glass disks with a rather lethal looking set of leyden jars used as a capacitor. Some of the instruments look simply stunning most of which are all or contain many precision brass parts.The museum also houses many fine art pieces, of which i know nothing about!If your in the area i can highly recommend it, it's only about 15 mins walk from Haarlem train station.They also have an impressive display of minerals in the Oval Room, of which i did sneek the attached picture of my Geiger counter over the, erm 'warm' end of the display cabinet.http://www.teylersmuseum.nl/Virtual Tour:http://instrumenten.teylersmuseum.nl/index.php?option=com_vr&Itemid=3&task=viewer&room_id=1
Because a white paper mask will help. - Page 1
Forum section: electronics / general

author: HP-ILnerd
author_rank: Frequent Contributor
timestamp: January 05, 2015, 08:43:51 am
content: The spent first stage of a (successful) Chinese Long March rocket lands near a village.http://spaceflightnow.com/2015/01/04/photos-long-march-rocket-stage-falls-in-rural-china/I would think the obvious scary orange cloud of residual nitrogen tetroxide would be enough to keep gawkers away and from handling debris, but not so much.The soldiers sent to guard the place look all safe too in what appear to be ordinary dust masks.

author: SeanB
author_rank: Super Contributor
timestamp: January 05, 2015, 01:20:25 pm
content: 1 billion replacements for them available pretty much off the shelf, so a few missing from incapacity is no worry.

author: free_electron
author_rank: Super Contributor
timestamp: January 05, 2015, 04:55:24 pm
content: Her eis how china solved the pollution during the olympics :send half their population into bejing. every body breathe in , hold your breath while walking home. totally clean air in bejing..
502 Bad Gateway error  - Page 1
Forum section: electronics / general

author: wilfred
author_rank: Super Contributor
timestamp: January 03, 2015, 11:07:59 pm
content: /.

author: justanothercanuck
author_rank: Frequent Contributor
timestamp: January 04, 2015, 03:58:47 am
content: I think that happens because of the db backup cycle. But don't hold me to that.
Full teardown of a Shure e4c earphone and driver - Page 1
Forum section: electronics / general

author: techy101
author_rank: Unknown
timestamp: January 03, 2015, 04:20:23 am
content: I had time at work today and decided to see if I could fix my damaged earphones (Spoiler...I couldn't). I ended up getting some pretty fascinating pictures through the scope camera of the inside of a high-end earphone and inside the driver itself. I though people here might appreciate a look.http://imgur.com/gallery/XXbNl

author: SeanB
author_rank: Super Contributor
timestamp: January 03, 2015, 05:52:47 am
content: Those must be hard to assemble, seeing as they look like there is a lot of hand work involved in manufacture.A lot better though than the cheap ones I buy, as those are cheap and I consider them as disposable items, though I do often repair the cable ends on them, as well as making the cord shorter so they do not dangle when used with the media player in it's regular location in a shirt pocket.

author: RobertoLG
author_rank: Frequent Contributor
timestamp: January 03, 2015, 06:11:30 am
content: hmm, never saw one like this, interesting
cool CRO effects - Page 1
Forum section: electronics / general

author: timelessbeing
author_rank: Frequent Contributor
timestamp: January 02, 2015, 03:46:36 am
content: http://www.jerobeamfenderson.net/post/101351329308/how-it-works

author: tautech
author_rank: Super Contributor
timestamp: January 02, 2015, 08:13:54 am
content: That was cool. Makes me want to get on with fixing a parked HP1640 I have tucked away.We have our own expertGKwho does some amazing CRO waveforms with HW.GK's thead:https://www.eevblog.com/forum/projects/t20347/msg286053/#msg286053

author: VK3DRB
author_rank: Super Contributor
timestamp: January 02, 2015, 12:46:08 pm
content: Quake on an oscilloscope...
Horoscope for 2015 - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: January 02, 2015, 09:50:29 am
content: Hard to see how anything from a random collection of objects, ranging in distance from "Fark that is a long way" to "Fark I thought the first one was far", can have any influence on you, seeing as the gravity field of the cot you were dropped in was orders of magnitude bigger in effect on you.

author: rob77
author_rank: Super Contributor
timestamp: January 02, 2015, 10:02:15 am
content: the objects on the skly have effect on you... a psychological effect coming from believing it has effect on youit's more or less the same as audiophilessome persons claiming themselves as mediums can apply some sophisticated social engineering (pretty ancient skill) to make you believe

author: sleemanj
author_rank: Super Contributor
timestamp: January 02, 2015, 10:47:59 am
content: I would disagree with the statement(s).The position of one planet and one star in particular has a rather large effect on each and every one of us in many ways.And also, Voltaire, religion is no wise mother, religion is nothing worth even thinking about.

author: Artlav
author_rank: Frequent Contributor
timestamp: January 02, 2015, 11:22:47 am
content: Hm...But if i plan on sending a probe to Jupiter, won't the positions of the planets affect how hard the trajectory would be to follow, and thus affect my life?

author: Electronics-Repairman
author_rank: Contributor
timestamp: January 02, 2015, 05:01:09 pm
content: So it remains the same then, which means I'm not going to win the lottery,or a Tektronix give away, and I suppose it means I'm going to work my butt off for a greedy and ungrateful boss does it " Happy New Year

author: dfmischler
author_rank: Frequent Contributor
timestamp: January 02, 2015, 05:48:06 pm
content: Quote from: sleemanj on January 02, 2015, 10:47:59 amIt can be important if you need to socialize/do business/sleep with religious people. Of course, that is no excuse to start believing in it yourself.

author: German_EE
author_rank: Super Contributor
timestamp: January 02, 2015, 07:16:52 pm
content: I know of only one instance of a celestial body affecting human behavior. Try walking past a psychiatric institution on the night of a new moon then examine the true meaning of the word 'lunatic'.

author: Syntax_Error
author_rank: Regular Contributor
timestamp: January 02, 2015, 07:34:29 pm
content: The funny thing is that I immediately went straight to my sign and said hah that's funny, before I noticed any of the others, and then had a really good laugh.

author: ConKbot
author_rank: Super Contributor
timestamp: January 02, 2015, 10:49:21 pm
content: I find the lack of order in that list disturbing.
yamaha htr - 3066 no sound - Page 1
Forum section: electronics / general

author: Jesse
author_rank: Newbie
timestamp: January 01, 2015, 10:42:46 am
content: Hello im new here im hoping someone can help me with my receiver. My little brother decided to try and update it and failed bigtime and now I have no sound im assuming if I can get hold of the original firmware I can reverse his wrong doings, is that even possible? ??

author: tautech
author_rank: Super Contributor
timestamp: January 01, 2015, 07:24:15 pm
content: Welcome to the forum.Best you start this thread again in the Repair board to get noticed by those whom seek to help with fixes.A bit more info will help for those that are not familiar with your model.Update it how?Does the UI operate correctly?Do headphones work?Got a schematic or service manual....post a link for it.

author: Jesse
author_rank: Newbie
timestamp: January 02, 2015, 12:39:05 am
content: Sorry ill find the repairs section and post there, no headphones, unfamiliar with the ui??? And he tried to put new firmware on the system via usb but its not for my model.

author: Jesse
author_rank: Newbie
timestamp: January 02, 2015, 01:09:24 am
content: And also I only have the original owner manual on disc but no help there

author: Jesse
author_rank: Newbie
timestamp: January 02, 2015, 03:09:08 am
content: And also I only have the original owner manual on disc but no help there
freelance/consulting project specification tips (specific to electronics) - Page 1
Forum section: electronics / general

author: jeremy
author_rank: Super Contributor
timestamp: January 01, 2015, 09:26:50 pm
content: Hi all,I'm in the process of putting together a spec for some freelance work. I've read lots of "make sure you do this" and "definitely don't do that" tips on this forum, but there doesn't seem to be one thread that catalogs them all (I did a bit of searching). So I thought I'd make this one to list some of my experiences, and perhaps some of you more experienced folks among us could chime in with their tips as well? I'm not really talking about specific legal advice, more like engineering advice. On top of this, if anyone has any specification documents that they are allowed to share, I'm sure it would be a very useful reference resource for us all.Although I don't consider myself very experienced in this area, I'll go first:=> Make sure you have a specification document, and that all parties involved have the exact same version and have signed off on it. Sign off could be corporate email, physical signature, etc but NOT VERBAL. All parties must also have a copy of the signoff. Seems obvious, but it's not always there=> If your project is a smaller part of something, like a daughterboard, try to get exact part numbers of any physical interconnects and put them in the specification. A mechanical drawing of the locations is important too.=> List your exact deliverables. They should be able to be ticked off like a shopping list. eg: 1 set of gerbers for the hyperspace card, 1 fully soldered prototype which has been fully tested to meet the spec, 2L milk. Following with the analogy, you don't want to get into a situation where someone tells you to "go get some eggs for the cake" and when you get to the supermarket/chicken coop, you realise that you have no idea how many are needed.
Quake videogame on an oscilloscope - Page 1
Forum section: electronics / general

author: pallisi
author_rank: Contributor
timestamp: January 01, 2015, 12:27:48 pm
content: Hi everybody,Let's see another usage of an oscilloscope!http://youtu.be/aMli33ornEU

author: Zero999
author_rank: Super Contributor
timestamp: January 01, 2015, 01:18:24 pm
content: Already been posted a couple of times.https://www.eevblog.com/forum/chat/quake-%28pc-fps-videogame%29-on-an-oscilloscope/msg578058/#msg578058https://www.eevblog.com/forum/testgear/quake-on-an-oscilloscope/msg577482/#msg577482
Happy new year to all :) - Page 1
Forum section: electronics / general

author: RobertoLG
author_rank: Frequent Contributor
timestamp: December 31, 2014, 07:13:56 pm
content: with good healt, many electronics and cool stuff!Alles gute!

author: Electronics-Repairman
author_rank: Contributor
timestamp: December 31, 2014, 08:47:11 pm
content: Happy New Year to you I hope none of the magic blue smoke escapes on you 2015,or anyone else on here.

author: Frost
author_rank: Regular Contributor
timestamp: December 31, 2014, 09:16:39 pm
content: I wish a happy new year.Quote from: RobertoLG on December 31, 2014, 07:13:56 pmDas war jetzt aber nicht Brasilianisch

author: RobertoLG
author_rank: Frequent Contributor
timestamp: December 31, 2014, 09:50:12 pm
content: Quote from: Frost on December 31, 2014, 09:16:39 pmOpa und oma sind deutscher

author: dr.diesel
author_rank: Super Contributor
timestamp: December 31, 2014, 09:54:24 pm
content: Yes, stay safe, party safe. Life is good, make for a better 2015.

author: TSL
author_rank: Regular Contributor
timestamp: December 31, 2014, 10:46:09 pm
content: Happy New Year ALL!cheersTim
There's fake caps and then there's not even trying. - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: January 03, 2015, 09:26:57 am
content: Rubycon caps, something tells me they are fake.

author: LoyalServant
author_rank: Regular Contributor
timestamp: January 03, 2015, 09:29:57 am
content: Wow.Are you going to pull them off and measure them?

author: SeanB
author_rank: Super Contributor
timestamp: January 03, 2015, 10:37:39 am
content: About the only thing on them that is somewhere near correct is probably the polarisation stripe, though it ciuld be to mark negative or positive lead..........

author: Psi
author_rank: Super Contributor
timestamp: January 03, 2015, 11:34:37 am
content: The polarity strip is the same printing, so it rubs off tooThe product is a RC speed controller which comes encased in clear heat-shrink, so normally you wouldn't be able to touch the caps.I'm not sure if they never got a the final manufacturing step (baked on / clear coated) or if the factory worker loaded the printing machine with something other than ink.

author: SeanB
author_rank: Super Contributor
timestamp: January 03, 2015, 11:44:21 am
content: Pobably used a bottle of off brand cheap ink. Why waste good money on marking the fakes with permanent ink if they are going after the maximum profit per device.Plus if they need another value or brand and have some left over just wipe clean and run through the marker again.

author: Stonent
author_rank: Super Contributor
timestamp: January 04, 2015, 01:22:59 am
content: My AliExpress $13.00 Samsung 64GB MicroSD card did that as well.

author: amyk
author_rank: Super Contributor
timestamp: January 04, 2015, 03:08:52 pm
content: Quote from: Psi on January 03, 2015, 11:34:37 amCould it be some solvent from the heat-shrink (evaporating during heating) that degraded the ink?
Quake (PC FPS videogame) on an oscilloscope - Page 1
Forum section: electronics / general

author: mcinque
author_rank: Unknown
timestamp: December 31, 2014, 04:45:22 pm
content: I saw similar things (i.e. Alan teaching how to display a video signal on a oscilloscope) or some other funny things like drawings and patterns, but nothing like converting a PC video game video output by using an audio signal...http://www.lofibucket.com/articles/oscilloscope_quake.htmlI think he has done a fun and interesting exercise!
Killer app for those old analog scopes - Page 1
Forum section: electronics / general

author: Gribo
author_rank: Frequent Contributor
timestamp: December 29, 2014, 07:27:43 pm
content: Quake:

author: VintageTekFan
author_rank: Regular Contributor
timestamp: December 29, 2014, 07:59:57 pm
content: Oh god why did I read the comments!

author: FrankenPC
author_rank: Unknown
timestamp: December 29, 2014, 08:18:18 pm
content: Genius. Looks like he's entered the Matrix.

author: leppie
author_rank: Frequent Contributor
timestamp: December 29, 2014, 08:40:21 pm
content: Quote from: VintageTekFan on December 29, 2014, 07:59:57 pmYeah, Youtube is getting close to XDA level

author: Red Squirrel
author_rank: Super Contributor
timestamp: December 29, 2014, 08:41:36 pm
content: This is pretty neat, but are they just driving the CRT directly or is it actually inputting data into the scope itself? Either way, pretty impressive.

author: tom66
author_rank: Super Contributor
timestamp: December 29, 2014, 08:45:56 pm
content: Quote from: VintageTekFan on December 29, 2014, 07:59:57 pmMost of those are deliberate "troll" posts from Reddit or 4chan users... none of them are serious.

author: electr_peter
author_rank: Unknown
timestamp: December 29, 2014, 09:18:15 pm
content: Very cool.What causes curvy lines effect - CRT, scope input circuitry or poor DACs? I would blame DACs/sound card filtering to 20kHz

author: T3sl4co1l
author_rank: Super Contributor
timestamp: December 29, 2014, 10:00:28 pm
content: Guessing sound card output. A shame -- vector output is a pretty cool idea, but it'll take dedicated hardware to pull it off in crisp detail!Nice thing about Quake (or 2 or 3, or..), you can rewrite the render functions til your heart's content, and pipe that info wherever you like. A natural for this sort of thing.Now, do it on period hardwareTim

author: Howardlong
author_rank: Super Contributor
timestamp: December 29, 2014, 10:41:15 pm
content: Soundcard, some notes in the link below, clearly this guy has more time on his hands than strictly necessary, a heroic academic exercise to be applauded. A clear example of "Because you can".http://www.lofibucket.com/articles/oscilloscope_quake.html

author: tom66
author_rank: Super Contributor
timestamp: December 30, 2014, 10:07:46 pm
content: For those wanting to block those stupid comments, there's now an addon for Chrome:https://chrome.google.com/webstore/detail/hide-fedora/acjgabfifnnmmlckmnijdbijgbfpedde

author: jancumps
author_rank: Unknown
timestamp: December 30, 2014, 10:19:38 pm
content: Quote from: Howardlong on December 29, 2014, 10:41:15 pm... he even dropped a 'and Bob's your uncle.'I like
scam? - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: December 31, 2014, 01:10:04 am
content: http://www.aliexpress.com/store/product/really-original-SJ4000-mini-dv-Please-believe-me-Really-original-SJCAM-SJ4000/1160511_32257556454.htmleven if it is a fake sj4000 its still really cheap

author: dannyf
author_rank: Super Contributor
timestamp: December 31, 2014, 02:12:18 am
content: You have had a perfect track record in spotting scams. So I would so, what you intend to buy, don't buy because it sure is a scam,

author: Richard Crowley
author_rank: Super Contributor
timestamp: December 31, 2014, 02:16:42 am
content: Quote from: dannyf on December 31, 2014, 02:12:18 am
Handy hints on makeshift battery charging - Page 1
Forum section: electronics / general

author: IanB
author_rank: Super Contributor
timestamp: December 05, 2011, 09:28:02 pm
content: Can get you out of a tight spot when you pick up your phaser and it doesn't work because the batteries are flat...

author: sonicj
author_rank: Frequent Contributor
timestamp: December 05, 2011, 11:43:05 pm
content: lurn something new everyday...

author: Psi
author_rank: Super Contributor
timestamp: December 05, 2011, 11:51:03 pm
content: lol, it starts off plausible and then just gets worse and worse.

author: Unknown
author_rank: Unknown
timestamp: December 06, 2011, 01:15:19 am
content: "But if you connect the positive terminals capacitance from the charged battery flows into" oh my. It's all there on the inter-web.

author: vk6zgo
author_rank: Super Contributor
timestamp: December 06, 2011, 01:44:27 am
content: AAAARRRRRGGGGGHHHHH!!!!!!!!!!!!!VK6ZGO

author: lowimpedance
author_rank: Super Contributor
timestamp: December 06, 2011, 02:04:31 am
content: Electrical tape CONDUCTS electricity, well bugger me I must be using fake stuff.He really needs to heed the safety warning on his phaser about looking into the output port when pulling the trigger!!!Infinite solutions = Infinite stupidityI wonder if he has any of those fancy USB cables!!.

author: Armin_Balija
author_rank: Regular Contributor
timestamp: December 06, 2011, 03:38:21 am
content: That guys videos are a riot.Impedance ratios. LOL

author: robrenz
author_rank: Super Contributor
timestamp: December 06, 2011, 03:55:11 am
content: You guys are just jealous that you are not at the technical level required to understand these advanced electronic principles. This guy is a genius

author: mobbarley
author_rank: Regular Contributor
timestamp: December 06, 2011, 04:07:40 am
content: Quote from: robrenz on December 06, 2011, 03:55:11 amAnd the money he is saving!

author: jshonw
author_rank: Contributor
timestamp: December 06, 2011, 04:52:39 am
content: How to Charge an iPod using electrolytes and an onion:

author: FrankenPC
author_rank: Unknown
timestamp: December 29, 2014, 07:14:40 pm
content: I just watched this video for the first time. I figured I'd revive the zombie thread rather than start a new one.The 9V solution is beyond elegant.
Buring an image to any (?) LCD panel - Page 1
Forum section: electronics / general

author: toomas
author_rank: Contributor
timestamp: December 29, 2014, 02:26:39 pm
content: So, today I was manually measuring my trusty 24" Dell U2412 LCD refresh rate, because it was reported 60Hz here and 59Hz there (turned out to be 59.9Hz) by running a program that switched a region on screen from black to white after every vsync. After a few minutes of epilepsy hazard while keeping a small solar panel towards the screen which was directly attached to a frequency counter I noticed that the flicker doesn't go away. It stayed there for hours. Removing power, doing factory reset, running lcd conditioning program built into monitor didn't help. Fortunately it just went away laterWhat is this? In one Dave's video his android phone started flickering the same way after configuring some internet of things thing in sd card form factor. I wonder if that is something that LCD displays just do.If you don't believe it, here are instructions on how to burn a bunny image into your LCD panelDISCLAIMER. IT MAT DAMAGE YOUR LCD PERMANENTLY, YOU DO IT ON YOUR OWN RISK.Open this gifhttps://dl.dropboxusercontent.com/u/47078707/epilepsy_bunny.gifLet it flicker somewhere on your screen for 5min or so, but don't look or you'll think it's your eyes playing tricks on you later. In my case the other parts of the screen were black, idk if that's necessaryScratch you head and worry if your LCD will ever be usable again(if you don't see it, turn contrast and brightness down to 50% or so)
Cleaning virus. - Page 1
Forum section: electronics / general

author: aargee
author_rank: Frequent Contributor
timestamp: January 12, 2015, 06:32:51 am
content: I don't know if this happens everywhere in the world at this time of year for those who have a significant other...I'm under orders from SHMBO to reduce the 'fire hazard threat' in the garage, this seems to have stemmed from the post Christmas clean up affliction. I think it might not be such an issue if my workbench didn't try and imitate Jim Williams', although don't let that statement fool you into thinking that my workbench could produce anything remotely close to the calibre of Jim's.I thought about getting the stuff I'm going to dump/E-waste, taking it out into the yard and try to set fire to each item and make two piles. Fire hazard and non fire hazard.To be fair, she has a point and some hazard reduction is required. We will be moving in a few years and the agreement is - workshop (not garage - a proper workshop) first then house.I know there are quite a few creative engineers who have this dilemma.

author: miguelvp
author_rank: Super Contributor
timestamp: January 12, 2015, 08:20:42 am
content: Perfectly normal, and don't be surprised when you move if the boxes with your stuff are labeled aargee's Junk or Stuff.
How many things I will Do? - Page 1
Forum section: electronics / general

author: wonderful
author_rank: Newbie
timestamp: December 29, 2014, 07:29:36 am
content: I am the SEO in wonderful pcb, an experienced PCB board manufacturer,provide various of printed circuit boards, I am very tired everyday, many many things I must do it , I am Confusion about this, I do not know what is my love do, what is I can do?

author: SL4P
author_rank: Super Contributor
timestamp: December 29, 2014, 11:08:28 am
content: I guess it starts with -How old are you?What are your life experiences so far?What school / working level have you reached until now?Do you have any daily responsibilities other than yourself? (parents, wife, pets, girlfriend etc - INPO)What are you keen or passionate about in your daily life? (hobbies, cars, computer, movies etc
Watch-TV? old korean drama ! - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: December 29, 2014, 06:46:51 am
content: if anybody enjoys (korean) TV drama with a fantasy twist (warning ... time travel is involved ... no flux capacitor is used ... but all the ancient costumes are really well donned and made)(its a korean drama, eng subbed)i believe the origin of the story may have been borrowed from thishttp://en.wikipedia.org/wiki/Hua_Tuo... but turned into something spanning both china and korea ...http://www.imdb.com/title/tt2373094/rated 8.4 (i would give it a 9 out of 10)http://wiki.d-addicts.com/Faithi hope somebody enjoys these series
FTC Samantha Module - Page 1
Forum section: electronics / general

author: vargoal
author_rank: Regular Contributor
timestamp: December 28, 2014, 09:25:50 pm
content: EEVBlog,I participate in First Tech Challenge, a high school robotics competition. We use what's called a Samantha Module for wireless communication and when you configure it you must use a flash drive less than2 GB. It's fairly annoying so I decided I would try and figure out why there is this limitation. So I went to the internet and started to search and found this website which explains it's design (http://john.toebes.com/projects/first/46-samantha.html). I started by looking at the boot loader source because I prefer software. I didn't find anything yet in software and as i have never used pic micro controllers to read from a USB flash drive I was wondering if there is any specific reason that flash drives over 2 GB wouldn't work. The Samantha module uses a PIC32MX460F512L. I'll post anything else I find but thanks for your help fellow bloggers.For those of you who haven't heard of First Tech Challenge or First Robotics here is a link to a video explaining it:

author: amyk
author_rank: Super Contributor
timestamp: December 29, 2014, 02:31:53 am
content: Quote from: vargoal on December 28, 2014, 09:25:50 pmThese come to mind:* Lack of FAT32 support* Storing abyteoffset into the device as a 32-bit signed integer instead of a block offset
Current Sensor: DC & AC, High-Bandwidth, Isolation - Page 1
Forum section: electronics / general

author: onemilimeter
author_rank: Frequent Contributor
timestamp: December 30, 2014, 02:33:28 am
content: Hi...I'm looking for an isolated current sensor which is able to measure DC & AC currents. I found the Sensitec CMS3000 series with a 3dB bandwidth of 2MHz. Please share if you know any other isolated current sensors (not current probe) that offer higher bandwidth than 2MHz.Thanks.
31C3 - 31st Chaos Communication Congress. With some interesting lectures - Page 1
Forum section: electronics / general

author: 128er
author_rank: Regular Contributor
timestamp: December 27, 2014, 09:17:30 pm
content: Hi!Currently the 31st Chaos Communication Congress takes place inBerlinHamburg. I thought to share that with you, because many of the lectures are very interesting. Often they are about IT security, science or sometimes even a few are related to electronics. Many of the lectures will be held in english.As an example. This is one of the more electronics related topics:https://events.ccc.de/congress/2014/Fahrplan/events/6084.htmlHere is the link to the main website of the event:https://events.ccc.de/congress/2014/wiki/Main_PageAn overview of the lectures for the next three days:https://events.ccc.de/congress/2014/Fahrplan/And the actual livestreams:http://streaming.media.ccc.de/I hope you will find some interesting content for you.

author: SeanB
author_rank: Super Contributor
timestamp: December 28, 2014, 09:44:20 am
content: In my to watch listVery interesting about the IOT and the rather glaring poor security of Internet connected devices.

author: Frost
author_rank: Regular Contributor
timestamp: December 28, 2014, 11:27:11 am
content: Quote from: 128er on December 27, 2014, 09:17:30 pmThe Congress 2014 is in Hamburg not Berlin

author: 128er
author_rank: Regular Contributor
timestamp: December 28, 2014, 06:09:36 pm
content: Quote from: Frost on December 28, 2014, 11:27:11 amD'oh, silly meThat was somehow the force of habit . . .
Watch this please! - Page 1
Forum section: electronics / general

author: LinkZ
author_rank: Contributor
timestamp: December 27, 2014, 08:41:27 pm
content: You have to watch the video ENTIRELY. I just couldn't stop laughing, people like this deserves their own tv shows, they are wasted on youtube!And here's another discovery that will change the world!

author: Richard Crowley
author_rank: Super Contributor
timestamp: December 27, 2014, 08:57:26 pm
content: Quote from: LinkZ on December 27, 2014, 08:41:27 pmI couldn't stay awake through the whole thing.QuotePeople like that HAVE their own TV shows. Why do you think commercial TV viewing continues to drop?QuoteThe amount of complete drivel and rubbish on YouTube boggles the mind.

author: Stonent
author_rank: Super Contributor
timestamp: December 27, 2014, 10:12:16 pm
content: Yeah and car batteries are filled with 300 CR2032 batteries.The guy somewhat reminds me of the Policeman from 'Allo 'Allo, but without the fake accent.

author: calexanian
author_rank: Super Contributor
timestamp: December 28, 2014, 12:27:58 am
content: Awwww... I was expecting like a huge monty python esque explosion at the very end.You can drag a charge back into alkaline batteries.. It happens all the time. You can actually reverse charge one as well in a series string where one fails early. They don't like it and don't last long and will typically leak and do all sorts of nasty stuff, but for demonstration purposes it does work... One day we will have lithium ion cylindrical batteries with integrated drop down regulators and ni cad and what ever else is out there will just be a memory

author: miguelvp
author_rank: Super Contributor
timestamp: December 28, 2014, 12:40:21 am
content: It was "meh" but I'm not prone to laughter and it takes a lot to crack me up.

author: zapta
author_rank: Super Contributor
timestamp: December 28, 2014, 01:18:38 am
content: Quote from: LinkZ on December 27, 2014, 08:41:27 pmLet me guess, LinkZ, is Gary Cutlack promoting his own videos.

author: TMM
author_rank: Frequent Contributor
timestamp: December 28, 2014, 01:26:53 am
content: he's obviously doing it wrong, this is how you recharge alkaline batteries, duh.https://www.youtube.com/watch?v=brdmnUBAS00&feature=youtu.be

author: calexanian
author_rank: Super Contributor
timestamp: December 28, 2014, 02:45:02 am
content: Quote from: TMM on December 28, 2014, 01:26:53 amAwesome... Thanks for pointing out those videos. Should be many many minutes of laughter.

author: dexters_lab
author_rank: Unknown
timestamp: December 28, 2014, 07:23:35 pm
content: Meh, so much for the punchline!Was expecting something more after 4 minutes of build up!
Tequipment discount - Page 1
Forum section: electronics / general

author: remilton
author_rank: Newbie
timestamp: December 27, 2014, 03:31:46 am
content: Would someone please send me the Tequipment EEVblog discount code?Thanks,Ron

author: vargoal
author_rank: Regular Contributor
timestamp: December 27, 2014, 04:42:09 am
content: PM Sent

author: nanofrog
author_rank: Super Contributor
timestamp: December 27, 2014, 06:55:36 am
content: FWIW, there's already another thread going for this (https://www.eevblog.com/forum/chat/special-price-for-eevblog-members/).