hybridfree/eevblog-posts huggingface dataset:
HP 8593B year of introduction - Page 1
Forum section: electronics / general

author: MetraCollector
author_rank: Regular Contributor
timestamp: April 09, 2013, 11:13:09 pm
content: Hello, excuse me for this little dumb question, but I can't find answer in HP journal archive.I was discovering HP spectrum analyzers products and had a stop about 8593B model, then I saw something strange:http://cp.literature.agilent.com/litweb/pdf/08590-90001.pdfQuoteHowever, design of these instruments is clearly 90's. Could anybody explain me history of these instruments ? Are they good for the prices (eBay) ? Or should I look for some Tek 49x ?Thanks and regards Ondrej

author: amspire
author_rank: Super Contributor
timestamp: April 10, 2013, 12:33:47 am
content: It seems that when Agilent pasted the front page on the scanned PDF of the HP manual , they got the date wrong.Not sure when the HP8590 series came out. 1992? No later then 1993.
Fastest 10bit DAC - Page 1
Forum section: electronics / general

author: casinada
author_rank: Frequent Contributor
timestamp: April 09, 2013, 01:22:42 am
content: http://www.militaryaerospace.com/articles/2013/03/Tektronix-fast-DAC.html?cmpid=EnlEmbeddedComputingApril82013http://component-solutions.tek.com/news-library/Tektronix%20Component%20Solutions%20Announces%20Worlds%20Fastest%2010-bit%20Commercial%20DAC%20-%20031813.pdfI wonder if they'll send me a free sample to play with

author: BravoV
author_rank: Super Contributor
timestamp: April 09, 2013, 01:33:07 am
content: Does Tektronix have their own fab ?

author: amspire
author_rank: Super Contributor
timestamp: April 09, 2013, 02:08:59 am
content: I think the chip was originally designed for the AWG70000 waveform generator:http://www.tek.com/signal-generator/awg70000-arbitrary-waveform-generator

author: w2aew
author_rank: Super Contributor
timestamp: April 09, 2013, 02:57:52 am
content: Yes - the chip was designed for, and is used in, the new AWG70000 series of Arbitrary Waveform GeneratorsNo - Tektronix does not have its own fab (anymore). The Tektronix fab was sold to Maxim in the late 80's / early 90's.Tektronix is a technology partner with IBM. The extremely high-performance circuits, like this DAC and the high speed ADCs in the scopes, are designed by Tektronix engineers in Beaverton, OR, and fabricated at IBM's SiGe foundry. The 25GS/s 10 bit DAC is done on the IBM 8HP SiGe process.

author: opablo
author_rank: Regular Contributor
timestamp: April 09, 2013, 02:27:19 pm
content: hey w2aew... how much would you charge me to switch brains with you ? how old are you ? how the hell you know so much ?to others: if you didn''t watch w2aew's youtube channel... you should:https://www.youtube.com/user/w2aew

author: w2aew
author_rank: Super Contributor
timestamp: April 09, 2013, 04:14:20 pm
content: Quote from: opablo on April 09, 2013, 02:27:19 pmThanks for the nice comments and plug for the YouTube channel - which hit another milestone overnight - >400,000 views! Wow!I'm 50 (yikes)! Got my BSEE degree in 1985, and have been working as a design, test and application engineer ever since. If you want to learn more about me, have a listen to The AmpHour podcast that Dave and Chris do. I was a guest on the show in October last year.http://www.theamphour.com/theamphour-117-undulating-utensil-utility/
500 EEVblog Videos!!!!!!! - Page 1
Forum section: electronics / general

author: ChrisGreece52
author_rank: Frequent Contributor
timestamp: April 10, 2013, 05:21:31 pm
content: Hello everyone i would just like to say thanks to Dave for his videos and ALL of the community for your help to me and all the other forum member and share great projects ideas and beliefs.KEEP GOING AND THANKS FOR THE AWESOME MATERIAL YOU SHARE WITH US.

author: nitro2k01
author_rank: Frequent Contributor
timestamp: April 10, 2013, 05:26:26 pm
content: Only C videos left until 200 then!
Cloud based parts/BOM system? - Page 1
Forum section: electronics / general

author: reagle
author_rank: Unknown
timestamp: April 08, 2013, 08:49:33 pm
content: Has anybody used a web/cloud based system to manage parts/BOMs?I've heard of Upverter and Circuit.io, but what I am looking for is something usable for commercial applications and mainly able to do basic things: generate part numbers, store BOMs, interface with EDA tools etc. What would you suggest other than rolling our own?
Energy Harvesting ic's - Page 1
Forum section: electronics / general

author: snipersquad100
author_rank: Frequent Contributor
timestamp: April 08, 2013, 08:01:56 am
content: Energy Harvesting ic'sVery interesting subject,watch this guys video on youtube

author: peter.mitchell
author_rank: Super Contributor
timestamp: April 08, 2013, 08:19:18 am
content: Discussion here --->>https://www.eevblog.com/forum/projects/video-tutorial-and-experiments-on-energy-harvesting-ics
wolfram alpha complex angles - Page 1
Forum section: electronics / general

author: Harvs
author_rank: Super Contributor
timestamp: April 07, 2013, 05:17:12 am
content: Anyone know if there's an easy way to get wolfram alpha to understand the short polar notation for complex numbers?e.g. 656.1?-28.36I can't seem to find it in the documentation.

author: c4757p
author_rank: Super Contributor
timestamp: April 07, 2013, 05:57:59 am
content: I don't think so. WA is basically Mathematica lite, and Mathematica (AFAIK) doesn't understand polar notation directly. The closest I think you're going to get is656.1(cos(-28.36)+i sin(-28.36)).

author: Harvs
author_rank: Super Contributor
timestamp: April 07, 2013, 06:11:26 am
content: Bugger, I was hoping to be able to write a small conversion program to take equations I've put together in MS equation editor, and effectively dump them into WA for solving.

author: rushorsch
author_rank: Newbie
timestamp: April 07, 2013, 06:54:36 pm
content: Try this:Code:656.1*cis(-28.36)

author: c4757p
author_rank: Super Contributor
timestamp: April 07, 2013, 06:58:58 pm
content: Quote from: rushorsch on April 07, 2013, 06:54:36 pmYes,cis. I should not have forgotten that.
Ohms Law Drawing - Page 1
Forum section: electronics / general

author: BiOzZ
author_rank: Regular Contributor
timestamp: April 07, 2013, 08:40:28 pm
content: A friend of mine sent me this on facebook and i thought it was quite funny and accurate!

author: peterthenovice
author_rank: Regular Contributor
timestamp: April 07, 2013, 08:57:05 pm
content: peanuts in a tunnel

author: Unknown
author_rank: Unknown
timestamp: April 07, 2013, 10:37:42 pm
content: I think you will find this was posted recently, some pages back... still, in every picture there's a meaning.
Photonicinduction Hacks  A Power Supply   - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 06, 2013, 04:46:51 pm
content: one his better videos quite a nice job too

author: c4757p
author_rank: Super Contributor
timestamp: April 06, 2013, 05:34:04 pm
content: Only he would think "I've got a perfectly good video about some nice mods to a variac box, now what this needs is some burnt wire!"
1000+ FPS video for less than $400  - Page 1
Forum section: electronics / general

author: BiOzZ
author_rank: Regular Contributor
timestamp: April 06, 2013, 04:16:05 am
content: Im shocked how little people know of Casios cameras ... even more surprised when they dont know such high speed pocket cameras exist!there "high speed" line (first group) herehttp://www.casio-intl.com/asia-mea/en/dc/lineup/#a0you would be mistaken for looking over the specs but if you look closely you see1280x720(15fps/20fps/30fps) / STD?640x480(30fps) /HS1000 : 224x64(1000fps)/ HS 480 : 224 x 160(480fps) / HS240: 512 x 384(240fps) / HS 120 : 640 x 480(120fps) / HS 30-240 : 512 x 384(30 to 240fps) / HS 30-120 : 640 x 480(30 to 120fps)i own an older version of the EX-ZR400 (dont have it on hand) and it still works great!photo and video quality is CRAPPPP in any mode and you need ALLOT of light and its small but still you cant do much better in full color for that price and size!and even at that resolution the video is quite crisp!i use 2 cheap working lamps with 100 watt bulbs to make videos with itit even has a nice mode where you can film in 30 FPS than switch to 240 than back to 30 with a button! and even pre-trigger photographs!i got mine for $250 on amazon a few years backEDIT: and yes you can take surprisingly long videos with it (1 minute +) but you CANT trigger it externally ... bummer! ... atleast on my model!

author: Psi
author_rank: Super Contributor
timestamp: April 06, 2013, 04:59:09 am
content: How bad is the sensor ghosting at 1000FPS, do frames blur together?

author: BiOzZ
author_rank: Regular Contributor
timestamp: April 06, 2013, 06:09:45 am
content: Quote from: Psi on April 06, 2013, 04:59:09 amhere are 2 of my videosThis one is a projectile going faster but its going threw plexy glass so is blurrier and smudgier BUT i step threw frame by frameits shockingly clear but i think that entire 1ms the sensor is ... ... sensing? XP

author: Psi
author_rank: Super Contributor
timestamp: April 06, 2013, 06:30:11 am
content: That's pretty good for the price.

author: BiOzZ
author_rank: Regular Contributor
timestamp: April 06, 2013, 08:31:36 am
content: yeah its surprising!note that the videos are stretched out so its not just a teeny box XPits implied but just to be sure!
what to do with 3 12v sealed lead battery 12a and 1 12 v 7 ah battery ? - Page 1
Forum section: electronics / general

author: lukem9962
author_rank: Newbie
timestamp: April 05, 2013, 01:38:33 am
content: hi what projects could i start with these battery s or what can i use them for i trash picked these when i did they were still sealed

author: megahz
author_rank: Regular Contributor
timestamp: April 05, 2013, 01:40:01 am
content: Careful picking up batteries from the trash, I got a car battery from the trash once and it leaked sulfuric acid

author: lukem9962
author_rank: Newbie
timestamp: April 05, 2013, 01:45:10 am
content: Quote from: megahz on April 05, 2013, 01:40:01 ami dont ususally pick them up but these were brand new and sealed weird huh

author: megahz
author_rank: Regular Contributor
timestamp: April 05, 2013, 01:50:27 am
content: Nice find, when I go through stuff I find cheap stuff that always backfires

author: steve30
author_rank: Frequent Contributor
timestamp: April 05, 2013, 03:29:23 am
content: I'm guessing they'd be too big to make anything portable?Maybe make a small solar power setup with solar panels to keep the batteries charged? That's what I'd do.

author: lukem9962
author_rank: Newbie
timestamp: April 05, 2013, 10:45:28 pm
content: Quote from: steve30 on April 05, 2013, 03:29:23 amthere quite small just little heavy could be portble though its just what to do with them even if i kept them charged what to use them for ?

author: peterthenovice
author_rank: Regular Contributor
timestamp: April 06, 2013, 12:54:00 am
content: make a ninja robot.

author: Rick Law
author_rank: Super Contributor
timestamp: April 06, 2013, 01:27:10 am
content: Quote from: lukem9962 on April 05, 2013, 01:38:33 am1. Hook it up to your UPS. You should parallel them, then you have 3*12AH + 7AH.-or-2. Put it on eBay. I may even buy it from you. I want to extend the run time on my UPS so I don't have to run down-stair like a headless chicken just to shut down the machine before the UPS run out of juice (if/when I have a power outage).

author: Psi
author_rank: Super Contributor
timestamp: April 06, 2013, 01:36:15 am
content: Do you need a high current powersupply?Buy a high current opamp for $20 (eg 3A OPA548 or $30 for 8A OPA549) and attach it to a CPU heatsink+fan-Wire the 3 batteries in series to the opamp supply rail.-Stick a pot on the opamp input to set the output volts-Stick a pot on the opamp current control input to provide an adjustable current limitAnd wow, you now have a 1.2 - 35V 3A/8A adjustable linear powersupply with adjustable current limit. It can even sink current!Ok, so it has some disadvantages, but its really easy to build. There's even a example diagram in the datasheet.You just need the $20 opamp, two pots, and few bypass caps plus maybe a large electrolytic on the input and the gain resistors, that's it!(well, maybe a 7805 to get 5V for the input logic)But yeah, its pretty minimal parts wise.The opamp even has overtemp protection.Hint: if you don't need 36V lower the number of batteries in series.There will be less heat/wasted energy.
Where to buy components in Fort Lauderdale  - Page 1
Forum section: electronics / general

author: Rodville
author_rank: Contributor
timestamp: April 05, 2013, 03:58:52 am
content: I know I can buy components like diodes, capacitors, and resistors online but sometimes I just don't want to wait. Anyone in the Fort Lauderdale Florida area know a good place local to get them?

author: Unknown
author_rank: Unknown
timestamp: April 05, 2013, 08:54:25 pm
content: Not to sure if this URL can help...https://www.alliedelec.com/customerservice/forms/contactus.aspxMy search started with RS and changed to this site ?

author: Rodville
author_rank: Contributor
timestamp: April 05, 2013, 08:57:30 pm
content: Quote from: vlf3 on April 05, 2013, 08:54:25 pmI tried that one. They sell only online and the local address is just an office. Thank you though.
Bipolar grounding scheme to reduce mains interference - Page 1
Forum section: electronics / general

author: nitro2k01
author_rank: Frequent Contributor
timestamp: April 05, 2013, 05:00:15 pm
content: I know of a (subsequently decommissioned) music studio in Sweden which had a special grounding scheme for the mains power. Instead of a neutral wire connected to protective earth in the fuse box and a hot wire, you would have two hot wires swinging to opposite sides of the protective earth. So between earth and either of the hot wires, you would have 110 V in opposite phase, whereas between the hot wires you would have 220 V, which was still the standard at the time, rather than 230 V.This was created by getting the mains power from a center tap transformer, where the center tap would be connected to the protective earth and the other two taps would be used as the hot wires. The earth connection would also be connected with a sturdy cable to a pole shoved down into the ground.As the story goes, this made the studio completely hum free, since all mains EMI would cancel out. You couldn't get hum if you wanted. (The one time where you would actually want hum is if you want to be able to touch the signal connection on a cable connected to a mixer to confirm that the cable is connected and the volume for that channel is turned up.)Has anyone here seen/used such a grounding scheme?

author: jahonen
author_rank: Super Contributor
timestamp: April 05, 2013, 05:12:33 pm
content: IIRC this kind of grounding scheme is in use in Norway (but it looks like that they are going away from that according to Wikipedia). It is also called as Balanced AC:http://www.equitech.com/articles/bpng.htmlThe main advantage is that leak currents of Y-capacitors cancel themselves out, so PE conductor does not carry them.Regards,Janne

author: G7PSK
author_rank: Super Contributor
timestamp: April 05, 2013, 08:23:36 pm
content: Only seen it on site transformers for 110 volt hand tools, transformer is center tapped and earthed so there is only 55 volts to ground.
LCD Display - Page 1
Forum section: electronics / general

author: Pilot3514
author_rank: Contributor
timestamp: April 03, 2013, 04:52:52 pm
content: In EEVblog #248 you go through the process of selecting an LCD display and microcontroller.I have limited experience with LCD. All of my experience has been with HD44780 and similar modules.Can you explain how LCD works, what a dedicated LCD microcontroller does for you, and show the signals on your fancy scope?

author: Unknown
author_rank: Unknown
timestamp: April 04, 2013, 02:38:18 pm
content: Not sure this will help, but URL's below might lead you into the area your looking for...http://www.spickles.org/projects/4-bit-lcd/http://www.arduino.cc/en/Reference/LiquidCrystalFound these other two, with control pin-outs and commands...http://www.spikenzielabs.com/SpikenzieLabs/LCD_How_To.htmlhttp://www.8052.com/tutlcdGood Luck.

author: Pilot3514
author_rank: Contributor
timestamp: April 04, 2013, 11:48:34 pm
content: Quote from: vlf3 on April 04, 2013, 02:38:18 pmI obviously failed to make myself clear.I can use an HD44780 interfaced from a microcontroller. The blog #248 talks about using a microcontroller to drive a 3 digit 7 segment LCD display. The display is less than $2 in volume. However, it appears that a special microcontroller is needed to drive these displays.My interest is what is required to drive these displays? What is special about these microcontrollers that make it possible to drive the LCD displays? I imagine that if I read the datasheets for these special microcontrollers I might be able to glean some meaningful information. However, I was kind of hoping that Dave would do a blog on the subject.I think it would be interesting to a wide segment of blog followers, but I could be wrong.

author: mariush
author_rank: Super Contributor
timestamp: April 04, 2013, 11:58:28 pm
content: The difference is that the HD44780 controller (and/or the clones) on your lcd display makes sure the actual lcd segments are 'driven' properly.The 2$ displays are plain lcd segments - you need to have AC voltage (or something simulating AC voltage) going through the segments to constantly change the polarity in the segments, otherwise they go bad.Here's two application notes that explain in detail how these segmented displays are made, how they work, how the substances inside behave etc, what a driver chip like hd44780 does etc :http://www.atmel.com/Images/doc2530.pdfhttp://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en011025The last link also includes code to make a common PIC microcontroller drive a LCD even though it doesn't have those special features.
Links to site's containing circuit schematics - Page 1
Forum section: electronics / general

author: snipersquad100
author_rank: Frequent Contributor
timestamp: April 03, 2013, 05:42:24 pm
content: I thought this might be useful for some people, Please feel free to add more links.http://www.aaroncake.net/circuits/http://www.discovercircuits.comhttp://projectscorner.blogspot.co.uk/http://www.zen22142.zen.co.uk/http://circuit-zone.com/http://electronicsclub.info/projects.htmhttp://freecircuitdiagrams4u.blogspot.co.uk/http://tronixstuff.wordpress.com/http://www.edutek.ltd.uk/http://www.4pcb.com/http://construyasuvideorockola.com/transformador_casero_01.php"use google crome to view in English"http://www.electronics-lab.com/http://electronicsproject.org/http://www.element14.com/community/index.jspa

author: johnboxall
author_rank: Unknown
timestamp: April 04, 2013, 03:12:17 am
content: http://www.talkingelectronics.com/te_interactive_index.html

author: Setar2k11
author_rank: Contributor
timestamp: April 04, 2013, 10:18:50 am
content: http://www.schematicsunlimited.com/

author: orbiter
author_rank: Frequent Contributor
timestamp: April 04, 2013, 11:55:53 am
content: http://www.eserviceinfo.com/

author: SeanB
author_rank: Super Contributor
timestamp: April 04, 2013, 03:53:54 pm
content: With eServicinfo a lot of the TV and monitor PDF's have some "interesting" watermarking.................

author: smashedProton
author_rank: Frequent Contributor
timestamp: April 04, 2013, 04:54:12 pm
content: Thanks! I was just about to go and search for more schematics to study. Thumbs up!

author: tom66
author_rank: Super Contributor
timestamp: April 04, 2013, 06:54:40 pm
content: http://www.tgohome.com/ServiceManuals/
Unknown vintage component - Page 1
Forum section: electronics / general

author: The Good Dr
author_rank: Contributor
timestamp: April 07, 2013, 12:35:53 pm
content: Hello everyone I was wondering if anyone could identify this component. It is a sealed glass tube that has two wires going into it, the red wire goes to the base and the black goes to the side just above the base. It measure's 50mm long and is 17mm wide. At the base of the tube there is quite a bit of mercury, this mercury cannot move around as its held in place by some liquid soaked wadding. The wadding's liquid is clear and has started to crystallise. This was removed from a vintage heart monitor from the 1960's any information on identifying this mystery component would be greatly appreciated, thank you in advance Edwin.http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=121091539592

author: Psi
author_rank: Super Contributor
timestamp: April 07, 2013, 01:13:01 pm
content: Some sort of specialized mercury switch is all i can think of.Maybe temperature triggers the wadding to let the mercury pass through and short the contacts?Or maybe a very long one-shot time delay. So the machine stops working when its due for a service?

author: The Good Dr
author_rank: Contributor
timestamp: April 07, 2013, 01:29:43 pm
content: Hi the time delay is an interesting theory as both connections make contact with the mercury

author: G7PSK
author_rank: Super Contributor
timestamp: April 07, 2013, 03:16:14 pm
content: Cant tell from the photo. but could it be some form of mercury rectifier, what was the position in the original equipment was it on its side or one or the other end up. also where in the circuit was it.

author: The Good Dr
author_rank: Contributor
timestamp: April 07, 2013, 03:33:05 pm
content: Hi all I got of the heart monitor was the front panel and this was mounded behind it. The way it was mounted was vertically, mercury at the bottom.

author: G7PSK
author_rank: Super Contributor
timestamp: April 07, 2013, 04:31:31 pm
content: which end is the top then and is one of the contacts then just sitting on the mercury while the other is at the bottom, some rectifiers just had a wire resting on the top of the mercury and as soon as current went through it it would lift of the surface.

author: SeanB
author_rank: Super Contributor
timestamp: April 07, 2013, 04:39:27 pm
content: Probably a Weston cell variant, used as a reference source.

author: The Good Dr
author_rank: Contributor
timestamp: April 07, 2013, 04:45:57 pm
content: Hello, both contacts are near the base of the mercury. There is no way anything can move as far as the mercury is concerned as the wadding material looks tightly packed over it. I'm out and about at the moment, when I get in i'll upload some more photo's, thank you for you reply

author: The Good Dr
author_rank: Contributor
timestamp: April 07, 2013, 04:48:17 pm
content: WOW!!! thank you very much, I have had a look at some Western Cells and thats what it looks like with the wadding and the crystals. Really happy I know what it is.Thank you to every one who looked at this post and replied
English Electric Valve - Page 1
Forum section: electronics / general

author: jpb
author_rank: Super Contributor
timestamp: April 08, 2013, 09:09:57 am
content: Dave,Is there a connection between the name EEVblog and the English Electric Valve company?I used to work for GEC which was the parent group for EEV and when I first came across EEVblog the initials seemed very familiar but I couldn't work out why, then I remembered.

author: TheWelly888
author_rank: Frequent Contributor
timestamp: April 08, 2013, 11:40:44 am
content: No connection. EEVblog simply stands for Electronic Engineering Video blog.

author: jpb
author_rank: Super Contributor
timestamp: April 08, 2013, 11:59:54 am
content: Thanks.I guess it was fairly obviousI just wondered whether Dave had fond memories of high powered magnetrons.
MOVED: Hantek - Tekway - DSO hack - get 200MHz bw for free - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: April 03, 2013, 11:21:03 pm
content: This topic has been moved toTest Equipment.https://www.eevblog.com/forum/index.php?topic=1571.0
The missing link. Camcorder or POV and uploading to the net via smart phone. - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: April 03, 2013, 06:39:46 am
content: Hi.I am lucky enough to own a helmet cam and also a smart phone. When on holiday, I can use both to keep in touch and capture hi def video of my trip.All is fine until I want to edit said Hi Definition video. For this I need to carry around a PC for only this purpose. And no longer want to.My next head cam will produce 4k video files.And I'll will be trying to upload with hotel wifi.Can we discuss options?Is there a practical (small) hardware solution already, or is there a need for one?As phones get more powerful, do you see the ever Phone Apps being up to stretch (I don't)?Do you have any suggestions?

author: brainwash
author_rank: Frequent Contributor
timestamp: April 03, 2013, 01:00:53 pm
content: 4k video files? Are you putting a RED on your helmet?Most high-end Android phones are able to capture FHD footage so there are also a few video editors available for that platform. Using USB OTG you are able to transfer files to/from your card/harddrive.That said, FHD video processing is taxing even on computers, I hate to think how your new phone will turn into a toaster as it processes video files for hours. Better get and ultrabook.Edit: I did use my phone to process my 16MP DSLR raw files and upload them but it was only as a necessity. Not to mention the immature software on mobile, imprecise touchscreen interface and general slowness.

author: SeanB
author_rank: Super Contributor
timestamp: April 03, 2013, 03:37:00 pm
content: You will be buying a shedload of removeable media storage, and a bag to carry it around.

author: brainwash
author_rank: Frequent Contributor
timestamp: April 03, 2013, 04:01:20 pm
content: Ok, my bad (in part) was that I did not know that Hero3 does 4k, albeit only at 12 fps. But even with today's laptops I'm not sure I would be able to edit and upload that while in a stop-over.I would say stick for now to FHD video and you would be able to edit it (trimming and minor stuff) and upload it using a high-end phone or tablet.If you are doing professional stuff then don't mind me.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: April 03, 2013, 08:24:08 pm
content: Quote from: brainwash on April 03, 2013, 04:01:20 pmYes, but the next model will be much higher. But the encoded bit rate is still up there.Quote from: SeanB on April 03, 2013, 03:37:00 pmAlready using redundant array of three 750gb wallet drives ferried around in little bubble wrap baggies. No problems.Quote from: brainwash on April 03, 2013, 01:00:53 pmYep I can use OTG but also have a card slot in the phone. Getting a Ultra book is admitting defeat.
Problem with EEVBlog Facebook page - Page 1
Forum section: electronics / general

author: RiverTown
author_rank: Regular Contributor
timestamp: April 03, 2013, 10:41:05 am
content: I noticed that maybe there is an issue with automatic links on EEVBlog Facebook page. Recent videos aren't linked there, last linked video is #443 Mailbag.Is it something wrong with a page or Dave decided not to put new videos on FB?

author: EEVblog
author_rank: Unknown
timestamp: April 03, 2013, 12:29:50 pm
content: That's usually done automatically by Youtube...
what does it do - Page 1
Forum section: electronics / general

author: peterthenovice
author_rank: Regular Contributor
timestamp: April 03, 2013, 03:47:45 am
content: http://www.ebay.com/itm/NEW-Test-Lead-Kit-Alligator-Hook-Set-with-Banana-Plug/270692589480?_trksid=p2045573.m2102&_trkparms=aid%3D555009%26algo%3DPW.V2DLCAT%26ao%3D2%26asc%3D14622%26meid%3D6692294861983364626%26pid%3D100034%26prg%3D7118%26rk%3D1%26sd%3D121085973874%26

author: c4757p
author_rank: Super Contributor
timestamp: April 03, 2013, 03:53:17 am
content: Sucks?

author: c4757p
author_rank: Super Contributor
timestamp: April 03, 2013, 04:02:43 am
content: I suppose you could tie all the leads together and use it as a leash for your (small) dog.

author: peterthenovice
author_rank: Regular Contributor
timestamp: April 03, 2013, 04:07:26 am
content: I now think the banans are in paralell with the other leads. for power supply use

author: c4757p
author_rank: Super Contributor
timestamp: April 03, 2013, 04:11:09 am
content: God only knows. It's like Frankenstein's Monster of test lead scraps.

author: Bored@Work
author_rank: Super Contributor
timestamp: April 03, 2013, 05:31:46 am
content: These are intended to power cell phones from a bench supply during cell phone repairs.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: April 03, 2013, 06:53:55 am
content: What does it do?You connect the usb port to a computer. You connect, say, 4000 volts to the red and black probes.Sit back and enjoy.

author: c4757p
author_rank: Super Contributor
timestamp: April 03, 2013, 11:05:08 am
content: Quote from: Bored@Work on April 03, 2013, 05:31:46 amAny idea what the other leads are for?

author: G7PSK
author_rank: Super Contributor
timestamp: April 03, 2013, 11:39:06 am
content: My guess is that you can power things from a USB the various clips are chosen for whatever suits your needs. Get one and find out.

author: peter.mitchell
author_rank: Super Contributor
timestamp: April 03, 2013, 11:53:58 am
content: Quote from: c4757p on April 03, 2013, 11:05:08 amYou have the phone powered from the USB, and a set of clips on the battery contacts (because most phones wont turn on without a battery), then you use the other clips to pull points high or low for testing purposes.

author: brainwash
author_rank: Frequent Contributor
timestamp: April 03, 2013, 11:54:53 am
content: It's a phone testing "kit". Some of the wires are tied together through resistors inside the black box so the black and read leads are not really isolated (as far as I remember).It's supposed to run at 3.3V or similar, the wires are very thin and the soldering really shoddy. Just moving the box around will likely desolder the wires or strip the pads.I bought one about 10 years ago for a lot less money (I think around 1$) and stripped it for the wires and clips. Even so, not worth it.
Ohm's Law (just a funny pic) - Page 1
Forum section: electronics / general

author: opablo
author_rank: Regular Contributor
timestamp: April 03, 2013, 05:36:50 am
content: Is this an oldie or a good one ?

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: April 03, 2013, 06:01:21 am
content: I haven't seen it before and I think its a very good way to explain what I've tried in the past to explain, and explain, explain.They say a pic tells a thousand words. And I'm going to steal and use it. Sorry.

author: staxquad
author_rank: Frequent Contributor
timestamp: April 03, 2013, 06:31:16 am
content: Quote from: opablo on April 03, 2013, 05:36:50 ameasy to understand ohms law depiction

author: gnif
author_rank: Unknown
timestamp: April 03, 2013, 07:41:31 am
content: Quote from: staxquad on April 03, 2013, 06:31:16 amI get the voltage is the pressure on the bottle, the resistance is the nozzle, and the current is the flow of sauce... but where does the kid and the chips come into it?

author: staxquad
author_rank: Frequent Contributor
timestamp: April 03, 2013, 09:00:35 am
content: Quote from: gnif on April 03, 2013, 07:41:31 amthe kid generates the pressure (electromechanical generator)the chips are the reason the kid's switch was turned on

author: tom66
author_rank: Super Contributor
timestamp: April 03, 2013, 09:11:34 am
content: Perhaps would need some indication of the voltage drop across the resistor, for example, a smaller volt character at the other end?
What did Dave study? - Page 1
Forum section: electronics / general

author: ChrisGreece52
author_rank: Frequent Contributor
timestamp: April 01, 2013, 09:08:28 pm
content: Hello i am a fan of the eevblog for many months and i would like to know this simple thing.What did dave study ?Thank you.

author: nitro2k01
author_rank: Frequent Contributor
timestamp: April 01, 2013, 10:35:46 pm
content: He's talked about this in the videos occasionally. In this video, Dave talks about his childhood and not so much about his education. What he does mention is that he started his formal electronics education at the age of 15, but that that is a story for another time. I'm curious if that story has been told in video form.

author: EEVblog
author_rank: Unknown
timestamp: April 01, 2013, 10:45:45 pm
content: Quote from: ChrisGreece52 on April 01, 2013, 09:08:28 pmElectronics Engineering, at what might be called the "associate degree" level in some countries, early on (yes, when I was 15). And later on regular EE at the degree level.

author: ChrisGreece52
author_rank: Frequent Contributor
timestamp: April 02, 2013, 12:03:41 pm
content: Thank you so much for your answer next year i am taking exams and i hope i get in a good Electronics Engineering university its my dream and i hope i make it in there i love electronics engineering so much.
Jaycar 2013 Catalogue available. But not for download. ROFL. - Page 1
Forum section: electronics / general

author: PeterG
author_rank: Frequent Contributor
timestamp: April 02, 2013, 09:28:56 am
content: Got mine today......Regards

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: April 02, 2013, 09:45:10 am
content: Quote from: PeterG on April 02, 2013, 09:28:56 amLucky you! Oh, you mean a catalogue.

author: johnboxall
author_rank: Unknown
timestamp: April 02, 2013, 11:01:54 am
content: It will soon be available on .pdf.If you're bored, Altronics have already released their pdf-http://www.altronics.com.au/index.asp?area=prtcat
excellence in design - Page 1
Forum section: electronics / general

author: mickpah
author_rank: Regular Contributor
timestamp: April 01, 2013, 08:18:48 pm
content: With all the amazing announcements yesterday I was reminded of a truly innovative company, sygneticshttp://www.americanradiohistory.com/Archive-Catalogs/Signentics%20Write%20Only%20Memory.pdf

author: N2IXK
author_rank: Frequent Contributor
timestamp: April 01, 2013, 10:48:54 pm
content: They weren't THAT innovative. After all, they were inspired by this infamous Eimac datasheet:http://www.americanradiohistory.com/Archive-Catalogs/Umac-606.pdfEimac also published a similar datasheet for a tube they called the "1Z2Z", but that one doesn't appear to be on the 'net anywhere....

author: free_electron
author_rank: Super Contributor
timestamp: April 01, 2013, 10:54:10 pm
content: pff. nothing beats national semiconductors fast LH002 and damn fast LH020 opamps ...

author: kxenos
author_rank: Frequent Contributor
timestamp: April 01, 2013, 11:20:23 pm
content: Quote from: N2IXK on April 01, 2013, 10:48:54 pmhahaha Filament: Urinated tungsten!!! ...the 606 can serve as an oscillator, modulator, or amplifier. It usually serves as all three simultaneously!!! Ratings will be available as soon as our competitors issue their catalogue!!! Exhaustive tests in our advertising department have shown that the 606 will give 50% more output than you will obtain!!!epic!!!

author: c4757p
author_rank: Super Contributor
timestamp: April 02, 2013, 12:04:55 am
content: Hehe... those are both nice. I particularly like "The uranium used for the urination", "Adjust until half as bright as flashlight", the grid leak control, and on the Signetics - "bit capacity vs. temp", "number of socket insertions vs. number of remaining pins" and the recommendation to use 1A fuses on all data lines.

author: N2IXK
author_rank: Frequent Contributor
timestamp: April 02, 2013, 02:52:55 am
content: Maybe Dave can find one of these retroencabulators in that amazing garbage room of his...
uCurrent max current limitation doesn't seem correct - Page 1
Forum section: electronics / general

author: thereza
author_rank: Contributor
timestamp: April 02, 2013, 12:03:02 am
content: Hi!I recently ordered a uCurrent (i just wasted a day debugging a problem that went away when I unplugged my HP 34401A (for a current measurement)). However, I want to measure currents up to 1A and the specifications only go to 300mA for the device.In looking over the circuit, you should be able to measure +- 1.5A (limited by the max output voltage of U1, which claims to be rail to rail, so 1.5V). I was wondering where the 300mA limit comes from? at 1.5A, i calculate a power dissipation of .03W which R1 should tolerate..I was also wondering if you could comment on the need for R12/R9 -- I assume they are for protection, but not sure of what...Thanks!Rezap.s. the photo capcha sucks on this site.

author: EEVblog
author_rank: Unknown
timestamp: April 02, 2013, 12:10:20 am
content: The Captcha goes away after a couple of posts.The current limit is the contact rating for the switch.R9/R10 are for potential stability with capacitive loads and some protection - just in case.

author: thereza
author_rank: Contributor
timestamp: April 02, 2013, 12:34:26 am
content: thanks for the prompt reply. So I can short SW1 with some jumpers to increase the current capability (and lock it in mA mode) and get 1.5A through it? Too bad you didn't use a higher load-capable switch in the design.Thanks!Rezap.s. i keep failing the capcha. the g looks like a 9

author: eevblogfan
author_rank: Frequent Contributor
timestamp: April 02, 2013, 06:13:52 am
content: heywhy don't you use logick gate fets and use the same switch so you can use it for all ranges ?p.s: you already got micro volt resolution cepable multimeter , why don't you just use simple shunt resistor ?
Hi to everyone! - Page 1
Forum section: electronics / general

author: andrewkirkby
author_rank: Contributor
timestamp: April 01, 2013, 02:34:36 pm
content: Hi there!I'm not sure if there's a better place to say hello to everyone, I've been a lurker on youtube for some time and it's probably a good idea I introduce myself now. I have a few projects on the go repairing old lighting equipment (theatre stuff) and I just picked up a Samsung TV a little like Daves only mine's LCD not plasma.I might make a youtube video of a teardown to compare their lcd vs plasma manufacturing but that's for another day.This forum has been a world of knowledge and I've based a few purchasing decisions on reviews here. Fluke 289 and Rigol 1052e to name a few..Hopefully some of you will be able to help me with projects in months to come. I'm a professional audio engineer by trade so if anyone has any questions that are audio related, I'll be happy to answer.All the best!AndrewEdinburgh, Scotland
pinout book - Page 1
Forum section: electronics / general

author: peterthenovice
author_rank: Regular Contributor
timestamp: March 31, 2013, 01:39:08 am
content: I was browsing online for a book a of pinouts midi,serial,atari,amiga,etc all I found was online editions. It would be very good reference when reparingand modding equipment. I was looking for a pdf.this is all i can findhttp://www.stjosephmusicfoundation.org/documents/Pinouts.pdf

author: johnwa
author_rank: Frequent Contributor
timestamp: April 01, 2013, 06:08:22 am
content: Have a look at the Hardware Book:http://www.hardwarebook.info/.They used to have a PDF edition, I am not sure if it is still maintained. In any case, all the info is on the website.
1st april - Page 1
Forum section: electronics / general

author: snipersquad100
author_rank: Frequent Contributor
timestamp: April 01, 2013, 09:17:16 am
content: Any April fool's this year dave?

author: EEVblog
author_rank: Unknown
timestamp: April 01, 2013, 09:42:32 am
content: No, I decided it was too much trouble.

author: johnmx
author_rank: Frequent Contributor
timestamp: April 01, 2013, 10:30:14 am
content: ahahahnice one!

author: MikeK
author_rank: Super Contributor
timestamp: April 01, 2013, 12:03:14 pm
content: http://www.geeksaresexy.net/2010/03/31/april-fools-day-prank-voice-activated-printers-copiers/

author: Jad.z
author_rank: Regular Contributor
timestamp: April 01, 2013, 12:31:37 pm
content: Microchip & Atmel supporting each others chips! MY ASS!

author: Bloch
author_rank: Unknown
timestamp: April 01, 2013, 12:32:44 pm
content: Quote from: EEVblog on April 01, 2013, 09:42:32 amWe cant have that
Circuit bending as a gateway to electronics. - Page 1
Forum section: electronics / general

author: Sebzy
author_rank: Contributor
timestamp: April 01, 2013, 01:08:17 am
content: Run several open community projects focused on teaching people of all ages new skills such as basic electronics. In the past I've tried just the basics but people seem to find it hard to grasp so I've changed my approach. We now hold workshops on circuit bending where people are encouraged to bring along all electronic toys and experiment.This approach seem to work well as the devices are familiar and the techniques are very simple but I'm wanting to expand on the idea now and allow people to take more away from the workshops without going into too much detail.Suggestions very welcomehttps://www.facebook.com/media/set/?set=a.575247319154640.1073741825.328564523822922&type=1

author: Sebzy
author_rank: Contributor
timestamp: April 01, 2013, 01:18:08 am
content: And this is pretty much what I go from when running the workshops.Original and best.http://www.anti-theory.com/soundart/circuitbend/cb01.html
Science Project - Page 1
Forum section: electronics / general

author: megahz
author_rank: Regular Contributor
timestamp: March 30, 2013, 08:42:13 pm
content: Well if you didn't notice I am 15 and in High School and next year I am taking a class called Research Methodology. It is required that I do a science project, and I have to submit the name of the project by the end of May, any good suggestions? I want to keep it electronics related because I am going to add it to my resume. I am open to any suggestions!

author: firewalker
author_rank: Super Contributor
timestamp: March 30, 2013, 09:44:29 pm
content: Study the way icebergs melt. Use an acrylic or glass tank fill it with water and put it in front o f black fabric. Through in a cube of ice (6x6x6 inches for example) an take photographs every minute or so.Edit:Just realized you want something electronics related only.Alexander.

author: megahz
author_rank: Regular Contributor
timestamp: March 30, 2013, 11:12:29 pm
content: Its ok, im open to anything

author: SoftwareSamurai
author_rank: Regular Contributor
timestamp: March 31, 2013, 12:12:11 am
content: Micro quadcopters are pretty popular these days. How about adding some unique hardware to one, like a pulsed laser altimeter? (Like a radar altimeter, except using micro-pulsed IR lasers.)

author: Rerouter
author_rank: Super Contributor
timestamp: March 31, 2013, 12:44:35 am
content: or as its research methodology, you could do something that doesn't require too much skill in either field, and make a battery discharger to log both constant current or constant powerin both cases the circuit to apply the load is very simple to make, and as for the actual discharge time, you can either be a little advanced and log the voltage vs time with say a micro's ADC, or simplify it and just set up a basic timer, so when battery voltage drops below "X" volts it stops the timer,its also going to be something i doubt most students would do so you'll get a bit ahead of the group by doing something different,

author: NiHaoMike
author_rank: Super Contributor
timestamp: March 31, 2013, 04:41:26 am
content: CPU performance vs. temperature? (Use an Intel CPU with Turbo Boost and do not exceed 70C.)CPU efficiency vs. temperature? (As above but you'll also need a Kill-a-Watt or equivalent.)Wireless network performance vs. distance?TV brightness setting vs. power consumption?Induction motor vs. DC motor efficiency? (Suggested test setup: get a small induction motor and a DC motor of about the same power and RPM rating and a fan blade that would fit both and load them down to about full load. For the most dramatic results, compare a shaded pole motor to a BLDC!)
Where to find a cable like this? - Page 1
Forum section: electronics / general

author: Mint.
author_rank: Frequent Contributor
timestamp: March 31, 2013, 12:29:39 am
content: Its from a Vesatx Spin 1 DJ console, I just tried modding it and broke the other end of cable in the process.

author: David_AVD
author_rank: Super Contributor
timestamp: March 31, 2013, 12:32:52 am
content: After working out the pitch (spacing between conductors), check the Element14 web site. It's called an FFC type cable.

author: Mint.
author_rank: Frequent Contributor
timestamp: March 31, 2013, 12:49:59 am
content: Thanks David I just ordered the cable!
my account "does not exist" 0_0 help ?  - Page 1
Forum section: electronics / general

author: eevblogfan
author_rank: Frequent Contributor
timestamp: March 28, 2013, 05:22:48 pm
content: heyI was far off my computer and whanted to enter my user , but seemed like I forgot my pass word hence pressed the "forgot you'r password" and anterd my e-mail and WTFFF? " no associated account "IT IS MY EMAIL !so I went on my email , serched on "eevblog" and found the pass word and the user name of course and plug that in to the bracets and .... NOTHING ! it is incorrect !please dave/moderator , I really afraid that somehow I'll be disconnected from mt account and I woun't be able to enterthank you in advance

author: eevblogfan
author_rank: Frequent Contributor
timestamp: March 28, 2013, 05:34:58 pm
content: I got the password and enterd my account , the only thing that anoyying me is that when entering my email to tha bracet , It does not recognizes my account , so you ask what I did ?I wrote my user name and it said it sent me email with that password change link and it indeed was the case , so the system knows where to send the email's but don't know that this email is related to my account ? 0_0 wierd ....

author: David_AVD
author_rank: Super Contributor
timestamp: March 28, 2013, 11:41:06 pm
content: Huh? I think I need a decoder ring to work out what you're asking / saying here.

author: ivan747
author_rank: Super Contributor
timestamp: March 29, 2013, 12:04:06 am
content: Did you change your display name? My display name is ivan747 but I login as ivaneduaro747.

author: eevblogfan
author_rank: Frequent Contributor
timestamp: March 29, 2013, 09:20:09 am
content: nope I did'tas for the question - I was asking first for immediate Help - though I figured it out so no need for that any more - now there is mystery left ,the "system" Do know to send my E-mail a message , But don't know to say " this X E-mail is related to that X user " - which is absolutely wierdthank you in advance
Bug in the system...  linked to outage at Japan nuclear plant - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: March 24, 2013, 07:11:31 pm
content: Rat

author: Unknown
author_rank: Unknown
timestamp: March 24, 2013, 10:24:53 pm
content: Well Fried, or what's left of a mouse ! one hell of a way to go

author: Mike Warren
author_rank: Unknown
timestamp: March 24, 2013, 11:29:06 pm
content: They get in to interesting places. This was a repair at my work about 15 years ago. Looks like the lizard fried himself crawling across the 240V mains on the PCB. The mouse thought fried lizard would be a good meal but managed to find the other side of the 240V connection terminals.

author: r90s
author_rank: Regular Contributor
timestamp: March 25, 2013, 03:29:02 am
content: I like this model better! It cost less too.

author: SeanB
author_rank: Super Contributor
timestamp: March 25, 2013, 07:53:02 pm
content: Won't work by me, the rats are bigger than some housecats I have seen. I feed them regularly, and they love the blue blocks so much, they eat them within hours. The people next door sat one day with a pellet gun, and picked off around 100 in a weekend. Note, I work near the harbour, where they feed on bulk meal and such. They had a humane trap, but the snake park stopped taking the rats, they were biting the snakes.

author: r90s
author_rank: Regular Contributor
timestamp: March 28, 2013, 03:11:47 am
content: Good Grief or WTF or just plain Darn-it...I was making an attempt to be funny, as I thought that equipment just to expensive to use as a mouse trap.. However they do make a RAT model of the model I linked to, but it only does one rat at a time.Maybe just drop my 1200 lb. anvil on the rat.