hybridfree/eevblog-posts huggingface dataset:
Apple, iThankyou... - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: June 18, 2012, 12:59:42 am
content: A poem for iPhone users, by me:Quote

author: PeterG
author_rank: Frequent Contributor
timestamp: June 18, 2012, 04:55:51 am
content: Spoken like a true Apple groupie/follower/worshipper.Regards
Idiot of Week Gets Owned By Physics  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: June 18, 2012, 01:16:12 pm
content: nice lesson in physics. I could see it coming, but still laughed

author: SeanB
author_rank: Super Contributor
timestamp: June 18, 2012, 03:57:21 pm
content: Though the barge was going to float away and catapult him into the drink complete with the mobile scaffold........This was way funnier, now you know why they have a cabled remote ( or a secure wireless one) for driving it while walking next to it.
AVR Dragon Win7 x64 drivers needed... and some help :) - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: June 15, 2012, 09:19:45 pm
content: Hi guys.I just got my AVR Dragon, a BIG thank you to all who recommended it. Here is my quandry, however - I want to use WinAVR, not AVR Studio. I am using Windows 7, 64 Bit - do I have to install ALL of AVR Studio, just to allow the drivers to install, or can I get them elsewhere? You know what Googling is like... confusion amasses until... arrgggh!I simply want to install the AVR Dragon, and use it with WinAVR & AVRdude, that's all. Any seasoned veterans care to assist?many thanks!~~Not to worry, I got it working... a few hours laterHere's cheers to the guy who didn't read the Atmel config page for the ATMega32, and forgot to wire up the VCC header to the ISP headerD'uuuhAll working now
How much maginification is good for SMD soldering? - Page 1
Forum section: electronics / general

author: Twistx77
author_rank: Regular Contributor
timestamp: June 15, 2012, 07:39:46 pm
content: Hi everyone!I just bought thishttp://www.velleman.eu/products/view/?id=380108magnification glass and I like it but the first thing I tried was to solder with it... obviously... But when doing so I came across a problem and is that I have too keep the magnifiying glass to close to my PCB and its annoying to work with the soldering iron.So I wonder if I made the right choice by taking the 5 dioptre (2.25x) one instead of the 3 dioptre (1.75X) what do you guys think?Anyone has experience on this, I usually don't use magnifying glasses to solder and obviously is not good for my sight.Thanks!

author: free_electron
author_rank: Super Contributor
timestamp: June 15, 2012, 08:20:31 pm
content: magnifyng glasses do not work. you need something with long working distance....

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: June 15, 2012, 08:36:58 pm
content: Follow the tread..https://www.eevblog.com/forum/general-chat/incoming-stuff-stereo-microscope-10x-20x-30x-60x/

author: Twistx77
author_rank: Regular Contributor
timestamp: June 15, 2012, 09:06:21 pm
content: Thanks I'll take a look at it. I've read a bit and they say 53mm is decent working distance?? I have nothing to argue about then, with mine is like 70mm.Thanks!
distribution transformer winding - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: June 13, 2012, 08:26:08 am
content: excellent

author: tesla500
author_rank: Regular Contributor
timestamp: June 13, 2012, 07:54:27 pm
content: Nice!Here's another version, somewhat more automated:

author: G7PSK
author_rank: Super Contributor
timestamp: June 13, 2012, 08:32:46 pm
content: Don,t you just love those american transformers, one ht insulator and common neutral earth for both HT & LT winding's. When winding's are made like those secondary's they are called packing's not winding's.
unusual motor very interesting - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: June 12, 2012, 08:34:07 pm
content: Those bearings wont last very long, I can hear them rumbling already.

author: MikeK
author_rank: Super Contributor
timestamp: June 12, 2012, 08:54:37 pm
content: He's passing current through the bearings? Oh gawd.I think Honda had a problem a while back where the electrical system was grounding through the front wheel bearings, causing them to wear out well before their time.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 13, 2012, 12:30:42 am
content: Fun but utterly useless - More info here :http://electricstuff.co.uk/bbmotor.html

author: Unclegummers
author_rank: Contributor
timestamp: June 13, 2012, 12:43:44 am
content: Is that FREE ENERGY?!?!

author: Mechatrommer
author_rank: Super Contributor
timestamp: June 13, 2012, 01:06:27 am
content: Quote from: Unclegummers on June 13, 2012, 12:43:44 amfree energy to the air. 25A to get a usefull rotation? my car cigarette lighter butt is better.

author: siliconmix
author_rank: Frequent Contributor
timestamp: June 13, 2012, 07:42:02 am
content: Quote from: mikeselectricstuff on June 13, 2012, 12:30:42 amis that your site mike ? .but what if every other bb is a magnet ? pmsl

author: G7PSK
author_rank: Super Contributor
timestamp: June 13, 2012, 07:46:29 am
content: If I read the operation principle correctly as the bearings heat up the whole thing will become less and less efficient to the point that when the balls are as hot overall as they can get before melting and there fore no more thermal expansion and more importantly enough residual heat to prevent rapid contraction after the expansion it will grind to a halt.

author: SeanB
author_rank: Super Contributor
timestamp: June 13, 2012, 03:34:05 pm
content: I have done that, it works well, if rather inefficiently. Just remember to use steel endcap bearings, or remove the rubber endcaps, otherwise there will be fun. Works best using a 12V car battery, and around 5m of 2.5mm bare steel wire as a ballast resistor. The wire glows red during startup ( until you move the shaft to start) and then cools down to just burning hot but not glowing. The motors generally will run for 5 minutes before something fails, either the cage melts, the balls drop out or the raceway arcs enough to seize.
Help out an AVR n00b... in fact, not even n00b status yet! - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: June 13, 2012, 12:53:14 am
content: Hi guys. I am looking for quality material on AVR programming, namely:1/ Some decent videos2/ The "de facto" programmer, in the same way "PICkit" range is for PICs3/ Some good places to learn, preferably ASM but C too if it is there4/ If possible, a description of which AVR is which (IE: the ones Dave snubs his nose at would be considered "old" to me)Cheers me dears

author: hlavac
author_rank: Frequent Contributor
timestamp: June 13, 2012, 01:03:44 am
content: 2: I recommend the AVR Dragon, it is relatively cheap, officially supported, good for ICSP, JTAG, even high voltage parallel programming and can do debugwire as well.Have been using it for quite a long time now and I like it.3: of courseavrfreaks.net

author: Unknown
author_rank: Unknown
timestamp: June 13, 2012, 01:25:41 am
content: Atmel AVRISP Mk. II would be the slightly cheaper option. More robust mechanical (case) and electrical design, but less features than the Dragon. Lacks debugging support (essential for some people, other people never use it) and high-voltage programming (useful if you screwed up the fuse settings or want to use /RST as a GPIO pin). Just like the PICkit, there are lots of clones, but I'd prefer a genuine one unless you're really strapped for cash.The ATmega48/88/168/328p(a) are popular, they are used in the Arduino and are an excellent place to start (plenty of IO pins for many applications, fair number of peripherals, debugWire support). The ATmega 164/324/644/1284p(a) is a relatively recent model if you need more IOs or RAM/ROM. ATtiny2313 is popular for smaller applications. ATtiny261/461/861a is interesting if you need lots of ADC channels. The various USB ATmegas (xxUx or AT90USBxxx) if you need USB connectivity. I'm not familiar with the Xmegas, even though they appear to be made of silicon as opposed to vapor these days.
### FANTASTIC AVR tutorials! ### - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: June 13, 2012, 01:45:57 am
content: As a spin-off from my other thread, asking for resources from which to learn AVR programming, I stumbled upon a VERY well made series of YouTube videos, and back from that to the guy's website. I feel he deserves as much coverage as possible. Seriously, this guy is a FANTASTIC teacher, puts me right at ease. So, if like me, you are new to AVR and want to learn fast, visit:http://newbiehack.com/MicrocontrollerIntroductionABeginnersGuidetotheAtmelAVRAtmega32.aspxCheers me dears
Great customer support from Garmin - Page 1
Forum section: electronics / general

author: deephaven
author_rank: Frequent Contributor
timestamp: June 11, 2012, 08:05:42 am
content: I had a broken battery cover on my Garmin 60CSX GPS. The unit was well out of warranty so I emailed Garmin last Thursday asking if they could supply a replacement. I had a reply on the Friday saying they could supply this and asked for my address. It arrived on Saturday. They didn't ask for a serial number, nor when it was bought and didn't charge me a penny. That's what I call customer service.

author: SgtRock
author_rank: Unknown
timestamp: June 12, 2012, 06:01:59 am
content: Dear Deephaven:--Garmin is a great company, they are the best in their field. They are the Fluke of the GPS business. I have an 86 Nissan Pickup with a bad speedometer cable, a chronic problem with these trucks. The cable makes a sharp right angle at the speedometer and there is no slack. They cannot be repaired and they are too costly to buy. Solution, a slightly used touch screen Garmin Street Pilot C340 from eBay for $36, shipping included. Now I have a speedometer, and a GPS to boot."He didn't know where he was going. But he knew where he was wasn't it."Lord Buckley 1906 1960Best RegardsClear Ether

author: T4P
author_rank: Super Contributor
timestamp: June 12, 2012, 07:12:27 pm
content: My dad uses a Garmin Something can't remember which one but one of the cheaper models many years back (3.2" i guess?)Still runs like a horse and the ability to select any GPS firmware is fantastic
Capacitive Sensor Slider Advice - Page 1
Forum section: electronics / general

author: johnnyfp
author_rank: Frequent Contributor
timestamp: June 13, 2012, 11:59:59 pm
content: Hi,I've been shopping around looking for a Capacitive Sensor that can do Slider type sensing.http://www.smsc.com/index.php?tid=38&pid=275&cid=&tab=5looks promising as they seem to offer low pin count and a SPI/I2C Slave output. I just want some simple finger sensing that I can hook into my existing MCU and tell me where it is so I can work out a light level.The one thing I'm unsure about is the Sensing for a Slide. Specifically the number of channels. I've seen many PCB designs that have five or more arrow shaped pads, that hook up to one of these chips, and presumably the MCU works out where your finder is. But these tend to be the higher number of channel and more pin count chips. So why don't they have a tapered pcb track, where it's narrow at the bottom and wide at the top to measure the slide value and use minimal of channels?CheersJfp.
Sending a Philips PM-8252a voltage-logger to Dave - Page 1
Forum section: electronics / general

author: eV1Te
author_rank: Regular Contributor
timestamp: June 11, 2012, 06:25:54 pm
content: I have an old voltage logger, a Philips PM-8252a that I would like to send to Dave for a teardown/mailbag episode.But the shipment would end up close to 170 Australian dollar from Sweden!Maybe someone knows a "trick" on how to get things shipped cheaply from Sweden to Australia?

author: free_electron
author_rank: Super Contributor
timestamp: June 11, 2012, 09:09:14 pm
content: put it in a bottle and throw it in the ocen , hoping the currents will eventually wash it up in kangaroo land ?

author: Short Circuit
author_rank: Frequent Contributor
timestamp: June 11, 2012, 10:27:20 pm
content: Considering the intended purpose; take it apart and send pictures

author: trevwhite
author_rank: Frequent Contributor
timestamp: June 11, 2012, 10:30:13 pm
content: Send it to someone en route and get them todo the same. Get a list of volunteers on here to map out a route.Trev

author: EEVblog
author_rank: Unknown
timestamp: June 12, 2012, 01:00:31 am
content: Quote from: trevwhite on June 11, 2012, 10:30:13 pmThat's how "Travel Bugs" in Geocaching work.Sending big heavy stuff overseas is just expensive, not much you can do about it.Dave.

author: codeboy2k
author_rank: Super Contributor
timestamp: June 12, 2012, 02:09:15 am
content: Quote from: EEVblog on June 12, 2012, 01:00:31 amsounds like a human powered version of UUCP (also FidoNet).

author: LEECH666
author_rank: Frequent Contributor
timestamp: June 12, 2012, 03:02:48 am
content: The only cheap way I can think of is to ask fellow members of the forums to chip on on the shipping cost. If interest in this particular unit is high enough maybe some people are willing to cover part of the shipping cost to see it get taken appart by that "crazy Aussi". Start a paypal fund ... or send the unit to Mike for an extreme teardown.Florian
Info req. Dave's old function generator design. - Page 1
Forum section: electronics / general

author: wilfred
author_rank: Super Contributor
timestamp: June 11, 2012, 01:22:44 pm
content: /.

author: LEECH666
author_rank: Frequent Contributor
timestamp: June 11, 2012, 02:54:07 pm
content: Some German page mentions HA-5002 from Intersil as a possible alternative. I can't evaluate how true this statement is. Slew rate and Bandwidth seem similar.http://www.intersil.com/content/dam/Intersil/documents/fn29/fn2921.pdfFlorian

author: aaronwan
author_rank: Newbie
timestamp: June 11, 2012, 02:58:53 pm
content: I made reference of Mr. Krzysztof Marcinek's design to build my MAX038 function generator. AD811 is used in the output stage. It's hot so I put a heat sink on it. The generator works fine for me so far.You can find the updated schematic from the URLhttp://www.kafka.elektroda.eu/podstrony/MAX038.phpPlease note the diodes across the two LM337 for protection on the negative side for 5V and 15V supply are in wrong direction!

author: LEECH666
author_rank: Frequent Contributor
timestamp: June 11, 2012, 03:03:32 pm
content: When I searched for 2000V/µs I came across this:http://www.analog.com/static/imported-files/data_sheets/AD844.pdfThe suggested AD811 seems to be even better speced.Meh whatever,Florian
SO many manuals, PDF format... alarms, phone systems, boilers... LOADS! - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: June 09, 2012, 11:38:02 pm
content: I found this site whilst looking for a manual for a friend... SO SO many...http://rikain.com/Manuals/

author: Rerouter
author_rank: Super Contributor
timestamp: June 10, 2012, 03:12:54 am
content: Its a nice collection of odd bits and pieces, but its not really all that large :/

author: GeoffS
author_rank: Unknown
timestamp: June 10, 2012, 05:44:43 am
content: A lack of any sort of index makes it too difficult to find what you're looking for.

author: saturation
author_rank: Super Contributor
timestamp: June 10, 2012, 12:28:28 pm
content: Up parent, the search is there. Its fairly easy for the site owner to link grep and allow searching down the directories. The contents seems geared to folks wishing to known about security systems and cameras, for whatever purpose.http://rikain.com/
REALLY BIG MACHINES -- FAK #14  - Page 1
Forum section: electronics / general

author: MikeK
author_rank: Super Contributor
timestamp: June 10, 2012, 03:31:35 am
content: Yeah, that's the space shuttle transport. It's quite impressive up close. As is the Saturn V rocket.

author: Mechatrommer
author_rank: Super Contributor
timestamp: June 10, 2012, 11:08:24 am
content: oil tankers and JFK destroyer are also big.

author: SeanB
author_rank: Super Contributor
timestamp: June 10, 2012, 11:16:21 am
content: Actually that was originally built for the Apollo missions, and has been used ever since for all transport to and from the VAB by NASA. Impressive is that it can hold a multi thousand ton load absolutely normal to the surface even though the roadway it is on is never really level or consistently canted. 1960's tech, all hydraulic and simple robust control systems that are probably very hard to replicate, but which do the job so well still.
Any reason to stay away from VM? - Page 1
Forum section: electronics / general

author: SuperMiguel
author_rank: Regular Contributor
timestamp: June 09, 2012, 03:39:52 am
content: Im using a mac, i was thinking to install windows 7, using bootcamp, but just wondering if there is a reason to use bootcamp instead of making a VM? using parallels or vmware?

author: PeterG
author_rank: Frequent Contributor
timestamp: June 09, 2012, 03:47:20 am
content: When i had a Mac, i was using Win7 on VirtualBox for my dev applications. Worked very well.Just my 2 CentsRegards

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: June 09, 2012, 04:23:24 am
content: QuoteSlow(er) performance, if that matters to you. For example, if you play games, you really want a dual boot setup.

author: PeterG
author_rank: Frequent Contributor
timestamp: June 09, 2012, 06:40:37 am
content: Win7 works very well on a VM , you just have to allocate 2 or more cores to get nice performance. I gave win7 2 cores on my Macbook pro and it ran like a dream. I didn't play games on it, I tend to use the Xbox for games.It costs nothing to test it on your Mac anyway VirtualBox is free.Regards

author: metalphreak
author_rank: Frequent Contributor
timestamp: June 09, 2012, 01:41:35 pm
content: I think VMWare used to let you boot up your bootcamp partition as a virtual machine as well while in OSX.http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1014618

author: ejeffrey
author_rank: Super Contributor
timestamp: June 09, 2012, 02:22:56 pm
content: Windows runs as well and sometimes better on a VM than real hardware. Gaming still prefers or requires native hardware, but for almost everything else, including many CAD applications a VM is the way to go.Just make sure you have enough hardware on the host, particularly memory. Assigning a second CPU core to the guest as PeterG suggests won't go wrong either.

author: SuperMiguel
author_rank: Regular Contributor
timestamp: June 09, 2012, 03:45:11 pm
content: My lappy is a i5 4gb of ram and 256 ssd can't upgrade it anymoreI used virtualbox on the pass both the interaction with osx is not that good. I'm using parallels right now and works good I guess...Also I'm using windows xp on that vm thinking about putting 7 on it since few report show that it runs faster on vm

author: PeterG
author_rank: Frequent Contributor
timestamp: June 09, 2012, 04:01:56 pm
content: My laptop is an i3 4GB and i run Virtualbox without issue.Xubuntu and Win7 run well with 2 cores and 2GB ram.Regards

author: LuckyJaker
author_rank: Contributor
timestamp: June 09, 2012, 11:41:29 pm
content: I use parallels on my MBP 17, very satisfied
Now Hiring: SpaceX! - Page 1
Forum section: electronics / general

author: bullet308
author_rank: Frequent Contributor
timestamp: June 09, 2012, 01:29:11 am
content: http://www.spacex.com/careers.phpApparently, with the successful flight of a Falcon 9/Dragon to the ISS, Elon Musk and Co. have gone on a bit of a hiring binge...

author: Bored@Work
author_rank: Super Contributor
timestamp: June 09, 2012, 09:08:38 am
content: QuoteNot everyone can be a rocket scientist

author: SeanB
author_rank: Super Contributor
timestamp: June 09, 2012, 10:03:29 am
content: Shoot, that counts me out.........

author: EEVblog
author_rank: Unknown
timestamp: June 09, 2012, 10:16:34 am
content: Quote from: SeanB on June 09, 2012, 10:03:29 amThere is doubt they'll even let me in the country again, let alone work there. I've used enough keywords to get me flaggedDave.

author: SeanB
author_rank: Super Contributor
timestamp: June 09, 2012, 10:30:15 am
content: The letting in is no problem, but getting out again may prove difficult. Remember the USA has a very nice airline that does deliveries, but is pretty poor at collecting and returns. You normally get a nice view of the Gulf, and a room with no view as well.

author: bullet308
author_rank: Frequent Contributor
timestamp: June 09, 2012, 11:11:59 am
content: Quote from: EEVblog on June 09, 2012, 10:16:34 amReally, Dave, if disliking George W. Bush was grounds for disqualification, most Americans would not be allowed in America...And of course, Musk himself is an immigrant from South Africa.

author: bullet308
author_rank: Frequent Contributor
timestamp: June 09, 2012, 11:44:09 am
content: OTOH, they have gotten a bit stupid of late...http://www.economist.com/node/21556579Let the job-creators in:America’s government should give more visas to people with ideas

author: djsb
author_rank: Super Contributor
timestamp: June 09, 2012, 03:42:54 pm
content: Funny that, I was just watching the film Another Earth last night where they where sending people on trips to,well, another Earth. Best part of the film, Brit Marling.Thats what this is all about in the end anyway. Has to start somewhere I suppose.David.
Fascinating embedded systems JTAG & reverse engineering lecture - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: June 10, 2012, 12:56:54 am
content: Hi guys. In my search for all things JTAG, I happened across my old pals at CCC.de ... and found this great video which explains pin finding, reverse engineering of embedded systems and JTAG:### OR ###http://media.ccc.de/browse/congress/2010/27c3-4011-en-embedded_reverse_engineering.htmlHope someone likes it - I do!

author: typeglob
author_rank: Contributor
timestamp: June 10, 2012, 08:47:06 am
content: Thanks for posting this.
Mitsibishi RF MOSFET marking - Page 1
Forum section: electronics / general

author: Rufus
author_rank: Super Contributor
timestamp: June 09, 2012, 02:24:22 am
content: Long shot, but, anyone have an RD01MUS1 MOSFET to look at or know what the package marking is (it isn't in the data sheet).

author: nanofrog
author_rank: Super Contributor
timestamp: June 09, 2012, 03:21:50 am
content: SOT-89
Part ID  - Page 1
Forum section: electronics / general

author: RedNeckEngineer
author_rank: Contributor
timestamp: June 10, 2012, 04:26:54 pm
content: Hey guys, I just bought a few SMD parts from Newark. They came in a nice a labeled anti static package with MFR #'s and a description on it. I took out the parts and the numbers and letters aren't even close to matching. If I got them missed up somehow or Newark accidentally mislabeled and sent the wrong part. Is there a way to ID the part? The part is labeled ADS1115IDGST on the package. The part it self has 11BOG1 on the top and 11BWL3F on the bottom. Thanks, Red

author: baljemmett
author_rank: Unknown
timestamp: June 10, 2012, 05:01:13 pm
content: TheTI pagefor the part lists, if you click through to the 'specific part marking lookup', a top-side marking of BOGI -- the preceding '11' appears to be a January 2011 date code. So sounds like they're the right part -- frequently the markings on smaller packages bear little, if any, similarity to the actual part number.

author: T4P
author_rank: Super Contributor
timestamp: June 10, 2012, 05:50:36 pm
content: I see like most of the SOT23 packages i have, have labellings match the last 4 numbers and digits in the part nameLike a Zener i have that is MMBZ5221BLT1G is only written as 1BLSearch the number you got on the package on farnell and see if it turns up

author: RedNeckEngineer
author_rank: Contributor
timestamp: June 10, 2012, 06:42:12 pm
content: Thanks for the help. Its seems there should be a way to link the real part number and the one the on the package, some kind of Nomenclature. If there isn't, I can see why, It would make it a lot harder to reverse engineer a finished product not know exactly whats in there. I guess you better trust your supplier, because if they mess up it's going to suck really bad.
I found a site that translate's ANY language into Australian... - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: June 08, 2012, 10:54:43 pm
content: Here it is:http://www.upsidedowntext.com/

author: T4P
author_rank: Super Contributor
timestamp: June 09, 2012, 03:06:16 am
content: ·¯·

author: vk6zgo
author_rank: Super Contributor
timestamp: June 09, 2012, 03:21:09 am
content: ¡¡¡¡ZZZZZZZZZZ

author: dcel
author_rank: Regular Contributor
timestamp: June 09, 2012, 05:30:33 am
content: ¿,,s??zzO,, s??l?s?pu? ,,ZO,, ??l???sn? ll?? su??l???sn? op ??M '?OApperantly it dont work so well.
Looking for learning resources for JTAG: any ideas? - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: June 08, 2012, 09:49:09 pm
content: Hi guysApart from Wikipedia, I can't seem to find any decent documentation (read: videos and how-to's) on exactly what comprises JTAG and protocols etc. I am looking at going into GSM repair and GSM repair solution design, and would need to be clued up on this.Anything would help, so long as it's not too in depth to start with. Thanks

author: free_electron
author_rank: Super Contributor
timestamp: June 08, 2012, 10:23:56 pm
content: JTAg : Joint Test Action Group is an orgaisatiion of industry professionals that seek to unify the test protocl , hardware and software used for in circuit debugging an device test.They came up with IEEE 1532 and 1149.1149 is for boundary scan while 1532 is for in circuit programming and testing.Devices are connected in series and are essentially shit registers. you seriall shift in and out commands and data. The standard defines a number of fixed commands any device understands. you can read things like manufacturer , device code ( this lets you identify what oyu are talking to ) and a base command set that lets you toggle i/o pins so you can set and read pin states of the devices. this is used for board debug like testing electrical connections.after that things become very complicated very quikcly. All other commands are device specific and you need the description from the device manufacturer for the instruction set and what it does ( sometimes signing NDA's is involved .. )Real JTAG tesplatforms are very expensive.. Corelis Scanexpress is something you can use on Bench. the rest is dedicated machinery from Agilent , Teradyne , and others. these are big board tester machines.The question is : what do you need it for ? if it is just to flash a rom you can get away with a simple tool like a Segger.Rolling your own is an undoable task as you cannot get a hold of device documentation. most manufacturers do not release (unless nda's are signed ) the commandsets to the devices.If it is really for board level testing ( the question is what testing ? contact testing you can do. that is standard in any device , but you will still need to analyse each and every device ... and build testsoftware per specific model / type phone .... ) beyond that ... ( like tracing code running through a jtag channel ) ... forget it.
DSO203 Pocket-Sized Digital Oscilloscope Manual - Page 1
Forum section: electronics / general

author: aneko
author_rank: Newbie
timestamp: June 07, 2012, 06:43:27 pm
content: Hello someone knows where I can get a manual for this oscilloscope...I don´t understand how work and I can´t find a manual in the web.Thanks!

author: siliconmix
author_rank: Frequent Contributor
timestamp: June 08, 2012, 09:22:30 am
content: www.diyertool.com/download/DSO203_Guide_RevA.PDF
Apache software security - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: June 08, 2012, 01:09:46 pm
content: Does any one know what software is behind this site as three sites including LinkedIn have now been hacked and passwords accessed they all run on Apache based software so the security flaw could be there. So I was wondering what the security risk is on this site.http://www.lse.co.uk/FinanceNews.asp?ArticleCode=qrmuj0emrqq615b&ArticleHeadline=UPDATE_1LinkedIn_works_with_FBI_on_password_thefthttp://www.huffingtonpost.co.uk/2012/06/08/lastfm-hit-by-password-leak_n_1580012.html?icid=maing-grid7%7Cuk%7Cdl1%7Csec3_lnk4%26pLid%3D112160

author: PeterG
author_rank: Frequent Contributor
timestamp: June 08, 2012, 01:18:28 pm
content: Apache is the most used web server package in use today so it is no surprise these sites used it for there base web server platform.Regards

author: Stephen Hill
author_rank: Regular Contributor
timestamp: June 08, 2012, 01:20:54 pm
content: The main problem was that they stored their passwords hashed with the SHA1 algorithm but without a salt. This makes all the passwords decryptable.You should always hash passwords with a salt so that it's hard/impossibe to decrypt.

author: Stephen Hill
author_rank: Regular Contributor
timestamp: June 08, 2012, 01:22:41 pm
content: Also, it's not known at this stage how they go access but I bet it was due to human error (easy to guess username/password or poor application code) rather than any security vulnerability of their software stack. (although not impossible to rule out).

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: June 08, 2012, 02:08:50 pm
content: 20K samples of the leaked passwords:http://pastebin.com/JmtNxcnBThese are added to a massive password database which is then resold for dictionary attack purposes.Here is a more comprehensive lists:http://dazzlepod.com/site_media/txt/passwords.txt(NOTE: 20 MB text file). If your password appears on the list, irrespective whether you use Linked-in, Last FM, or some other service etc., change your password immediately.
Permanent markers and IPA - Page 1
Forum section: electronics / general

author: 8086
author_rank: Super Contributor
timestamp: June 08, 2012, 01:30:25 pm
content: Does anyone know of any permanent marker that is not easily removed with IPA?I want to write on paste stencils and be able to clean them with IPA without losing the writing.Sharpies don't seem to do the trick.

author: robrenz
author_rank: Super Contributor
timestamp: June 08, 2012, 01:53:01 pm
content: Acid etch pen.http://67.59.156.7/merchant2/merchant.mvc?Screen=PROD&Product_Code=11098Dgoogle acid etch pen for others.

author: Short Circuit
author_rank: Frequent Contributor
timestamp: June 08, 2012, 01:54:12 pm
content: etching marker or paint marker
Hot Glue Gun Extruder "3D PrinteR" - Page 1
Forum section: electronics / general

author: T4P
author_rank: Super Contributor
timestamp: June 07, 2012, 03:39:19 pm
content: http://www.instructables.com/id/Hot-Glue-Gun-Extruder-for-Your-CNC-Machine-or-3D-P/Impressive

author: gtsili
author_rank: Contributor
timestamp: June 08, 2012, 12:16:34 pm
content: I had the same idea but never checked if someone had tried it. It is time to take apart this malfunctioning printer I was given and try it myself.
Cubelets - Page 1
Forum section: electronics / general

author: kek
author_rank: Regular Contributor
timestamp: June 09, 2012, 03:36:59 am
content: Very cool toy on Spark Fun's new product posthttp://www.sparkfun.com/products/11074Hour long presentation from Eric Schweikardt guesting on above video.Name of book Eric talks about highly towards end of his presentation:Vehicles: Experiments in Synthetic Psychology by Valentino BraitenbergQuite expensive at $160 but my little daughter is worth it!Ken

author: Short Circuit
author_rank: Frequent Contributor
timestamp: June 09, 2012, 06:09:09 am
content: Saw the friday ne products post from SF, and yes quite cute, but not worth the price imho.By the time you can build anything 'serious', you'll have spended some $500-$1000 on these building blocks.You can by a tremendous shitload of lego or mecano for that, which is a lot more stimulating forengineering spirit also. Things like this modular 'programming' could also be done in software on this LegoMindstorm thing using regular sensors and actuators.
Help with DC motors. - Page 1
Forum section: electronics / general

author: Dark Prognosis
author_rank: Regular Contributor
timestamp: June 06, 2012, 04:22:53 pm
content: It has been a LOT of years since I built a motor and I never had much issue with what I am seeing on youtube. Seems every DC motor I see they have to manually spin the thing before it starts but I do not remember ever having to do that. Heck I had plenty of dc motors for toy cars etc... that would start right up as soon as I hit it with a 1.5vdc source directly to the motor.So, has something changed?

author: G7PSK
author_rank: Super Contributor
timestamp: June 06, 2012, 05:28:36 pm
content: Most likely synchronous motors they need a starting force applied to them, either manual or an extra set of winding's.

author: Dark Prognosis
author_rank: Regular Contributor
timestamp: June 06, 2012, 06:07:49 pm
content: Well, the ones I am seeing have been 2 windings and many magnets but were 100% DC and a synchronous motor is AC.

author: SeanB
author_rank: Super Contributor
timestamp: June 06, 2012, 06:52:26 pm
content: Most likely the motors have a very low starting torque, or the brushes and bearings have a very high breakaway torque. You can also have the brushes aligned so that they are not creating a magnetic field, or the field is aligned perfectly with the magnet pole, so there is no torque generated. These motors will then not be self starting unless they are moving already. Most motors are designed so that there is always a shaded pole, or a coil that will generate torque in the magnetic field of the stator. This then makes them self starting, but has a downside of cogging and a slight loss of efficiency.

author: Dark Prognosis
author_rank: Regular Contributor
timestamp: June 06, 2012, 07:26:35 pm
content: Is there any simulation software (nothing like that around back when I worked with motors) available for motor making? Windows based.

author: Galenbo
author_rank: Super Contributor
timestamp: June 07, 2012, 06:05:11 am
content: The -2000 indoor electric Forklifts all have DC motors.Stator windings, Rotor windings, put DC voltage on it, and it drives instantly.till 1990 simply with serie resistance, and parallel/serie switch,later models had electronics PWM.Now most have AC motors. Electronics is there anyway, and AC motors have the advantageto not have brushes, and brake energy recuperation is more efficient..
Liars and outliers - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: June 06, 2012, 04:47:31 pm
content: very thought provoking on the issues of securityand mess mankind has made over it, just take a look at airport security, over reaction to bombs, insane law robbing us of liberty.

author: PeteInTexas
author_rank: Frequent Contributor
timestamp: June 06, 2012, 04:51:16 pm
content: As we speak, a "big box" store a stones throw from where I am typing this is being evacuated due to a bomb threat.Yeah, its all "security theater" until its real.

author: SeanB
author_rank: Super Contributor
timestamp: June 06, 2012, 05:33:59 pm
content: What are you worried about? I lived with real terrorists. The kind who could and did blow up shopping centres, hotels and such.

author: bullet308
author_rank: Frequent Contributor
timestamp: June 06, 2012, 05:53:15 pm
content: Quote from: SeanB on June 06, 2012, 05:33:59 pmThat must have made for some interesting parties...Human beings are notoriously flawed when it comes to assessing threats. Some kinds they grossly underestimate, others the grossly overestimate.The threat of a bomb is real. Is that threat proportional to other threats given the trouble and expense we go to trying to counter the threat? Not so much.

author: george graves
author_rank: Super Contributor
timestamp: June 06, 2012, 07:24:39 pm
content: Quote from: SeanB on June 06, 2012, 05:33:59 pmYa, sure ya do.

author: PeteInTexas
author_rank: Frequent Contributor
timestamp: June 06, 2012, 08:45:41 pm
content: Turned out to be a false alarm. Well, the police did a "primary and secondary search" and found nothing. Employees and customers were allowed back in by around noon. Although all bomb threats are taken seriously of course, there was probably a heightened sense of caution as this "big box" store, at another nearby location, had a shooting incident that killed a police officer about a month or so ago.Fortunately, this incident has only disrupted which restaurant I was going to take my lunch.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: June 07, 2012, 01:14:43 am
content: QuoteSounds like a typical end result of the security theatre which you criticised earlier. Essentially we are talking about a social environment that is highly sensitised to the concept of "terrorism" and gets spooked every time a superficial thing that looks "out of place".To objectively assess the true threat of terrorism, you'll have to look at actual statistics, and see how many people die from terror related incidents per capita. The reality is that getting hit by a car is a significantly greater threat to the average citizen than terrorism could ever aspire to be. The difference here is that the latter is about showmanship and the former isn't.

author: MikeK
author_rank: Super Contributor
timestamp: June 07, 2012, 01:27:34 am
content: Yes, but it's easier to whip the chattle up into a frenzy and demand huge defense budgets over terrorism.
One for the RF nerds: Direct Conversion DSB Transceiver for 80M - Page 1
Forum section: electronics / general

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: June 04, 2012, 06:05:00 am
content: The DSB80 – A Direct Conversion DSB Transceiver for 80M By G4JST and G3WPO – First Stage Of BuildingThe construction steps look ace!

author: siliconmix
author_rank: Frequent Contributor
timestamp: June 04, 2012, 07:14:36 am
content: that link has insecure content acording to AVG

author: amyk
author_rank: Super Contributor
timestamp: June 04, 2012, 08:39:01 am
content: Quote from: siliconmix on June 04, 2012, 07:14:36 amTry this link instead:http://aa7ee.wordpress.com/2012/06/03/the-dsb80-a-direct-conversion-dsb-transceiver-for-80m-by-g4jst-and-g3wpo-first-stage-of-building/

author: siliconmix
author_rank: Frequent Contributor
timestamp: June 04, 2012, 10:28:38 am
content: looks like a very stable vfo with the fet osc and buffer.a lpf would do any harm straight after the vfo if just one band is used.shielding between stages.bit confused as the title said transceiver.i like them little island pads for manhattan style building.were they made or bought ?

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: June 04, 2012, 11:13:10 am
content: I think some of those pads can be bought.ps. ditch AVG.

author: codeboy2k
author_rank: Super Contributor
timestamp: June 04, 2012, 09:20:57 pm
content: Quote from: AntiProtonBoy on June 04, 2012, 11:13:10 amI love those pads. and the DIP and SO-8 pads too. I usually do my breadboards the traditional way,punching out copper circles with a paper punch, and the IC's are legs up dead bug style. But this is somuch neater looking, you can almost (sometimes) box it up and use it as it is.The squares have more room. I'm often putting two copper pads side-by-side to make a bigger pad.Seeing this makes me want a square punch to make 1cm square pads from copper blanks.

author: Rufus
author_rank: Super Contributor
timestamp: June 06, 2012, 12:18:21 pm
content: Quote from: codeboy2k on June 04, 2012, 09:20:57 pmHave you seen a source for them?
Interesting tutorials. - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: June 03, 2012, 10:01:59 pm
content: I came across this today its by a chap in Chile, I found it very interesting and thought I would share the link. Particuarly good on transformer winding.http://ludens.cl/Electron/Magnet.htmlhttp://ludens.cl/Electron/trafos/trafos.htmlhttp://ludens.cl/sitemap.htm

author: kripton2035
author_rank: Super Contributor
timestamp: June 03, 2012, 10:14:49 pm
content: ++1the second link is amazing... thanks for this.I knew this web site, but didnt notice the transformer page ...

author: IanB
author_rank: Super Contributor
timestamp: June 03, 2012, 10:16:13 pm
content: I think the author is a member here, but I don't remember his username.

author: siliconmix
author_rank: Frequent Contributor
timestamp: June 05, 2012, 06:53:35 am
content: a weber ? .very good he managed to do a tutorial on xformers without a drawing.i do like his 20 amp power supply.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: June 05, 2012, 07:15:21 am
content: nice find!

author: typeglob
author_rank: Contributor
timestamp: June 06, 2012, 12:36:00 am
content: I got a trial subscription to Elektor and so far, I've found this guys website much more interesting than that darn useless magazine :-p
How Skittles marketing fixes factory cock-up - Page 1
Forum section: electronics / general

author: amyk
author_rank: Super Contributor
timestamp: June 04, 2012, 08:36:51 am
content: "Turn a negative situation into a positive one"QuoteIs that an American package?

author: Simon
author_rank: Unknown
timestamp: June 04, 2012, 12:43:52 pm
content: Quote from: amyk on June 04, 2012, 08:36:51 amyes that looks like American, they say candy rather than sweet and the weight is in ounces

author: metalphreak
author_rank: Frequent Contributor
timestamp: June 04, 2012, 06:27:59 pm
content: This is the general chat sectionIt's a joke. The OP isn't confused. The premise being someone cocked up the production run with all the colours being wrong, and marketing came up with a clever solution to cover it up.

author: Wartex
author_rank: Frequent Contributor
timestamp: June 05, 2012, 03:17:22 am
content: Quote from: iamwhoiam on June 04, 2012, 06:40:25 pmYes, because QA is tasting candy every 20 seconds, right?. They produce tonnes of them by the minute and by the time QA picks it up, management might have decided to just print a diff package. It's a joke post either way, Einstein.

author: mariush
author_rank: Super Contributor
timestamp: June 05, 2012, 02:11:47 pm
content: There is a candy company in US that has a "mystery flavor" ... basically when they change batches, instead of cleaning the vats and throwing away what's still inside, they just add the new batch over and the first output gets titled "mystery flavor" :https://www.youtube.com/watch?feature=player_detailpage&v=xUpGTvPrCG8#t=185sJump to 3:00 for the explanation.
Anyone member of radiomuseum.org ? - Page 1
Forum section: electronics / general

author: chrome
author_rank: Regular Contributor
timestamp: June 03, 2012, 06:16:50 pm
content: Like the title says, is anyone a member there?I would like to get the schematics for myPhilips PM6615 1GHz counterbut membership costs 25$, and 25$ for 5 pictures seems a bit much to me.

author: MikeK
author_rank: Super Contributor
timestamp: June 03, 2012, 06:26:38 pm
content: There's a PDF for it here:http://www.vintage-radio.net/forum/showthread.php?t=67652

author: chrome
author_rank: Regular Contributor
timestamp: June 03, 2012, 06:34:00 pm
content: oh... well I guess that's closed then, thanks.

author: Satchmoeddie
author_rank: Contributor
timestamp: June 03, 2012, 10:21:56 pm
content: Try getting info from the "TCA" Tube Collectors Association members. I can ask. Was this a UK or Canadian organization? I seem to remember it from looking for advice on old wind powered light plant powered battery radios.

author: David Aurora
author_rank: Frequent Contributor
timestamp: June 04, 2012, 03:22:24 pm
content: Looks like I'm too late, but yeah, I am. I went through the nightmare of signing up ages ago chasing a schematic, and by the time I was a member I'd lost interest. Major pain in the ass. I'll get to it one day I guess.
google picassa - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: June 04, 2012, 07:32:24 am
content: just downloaded google picassa image viewer.i'm really impressed.the zoom is exceptional for a freebie.

author: LEECH666
author_rank: Frequent Contributor
timestamp: June 04, 2012, 03:06:31 pm
content: It's a nice image viewer. Another nice one that I can recommend is Faststone Image Viewer.Personally I use a very old Yo-ho-ho (and a bottle of rum) version of ACDSee.There is also XNview and iRfanview. These two are worth mentioning too.Florian
Hex confusion: what value is attained when I decrement 0x00? - Page 1
Forum section: electronics / general

author: iamwhoiam
author_rank: Contributor
timestamp: June 03, 2012, 04:07:58 pm
content: Hi guys. Being used to decimal, naturally, I am confused by this; the part highlighted in red:LED_PAUSEMOVLW 0xFFMOVWF LED_LOOP2LED_PAUSE2CLRF LED_LOOPDECFSZ LED_LOOP,FGOTO $-1DECFSZ LED_LOOP2,FGOTO LED_PAUSE2ENDSeeing as "LED_LOOP" has been issued CLRF, and hence contains 0x00, what value does decrementing 0x00 result in; 0xFF?Hex n00b!Thanks.

author: MikeK
author_rank: Super Contributor
timestamp: June 03, 2012, 04:14:49 pm
content: The opposite of what happens when you increment 0xFF.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: June 03, 2012, 04:42:06 pm
content: Quote from: iamwhoiam on June 03, 2012, 04:17:54 pmNot necessarily a fail, it depends how the byte is interpreted.If you interpret 11111111 as an unsigned binary, then its hex equivalent is 0xFF, or 255 decimal.If you interpret 11111111 as a two's complement signed binary, then hex is -0x01, or -1 decimal.That being said, hex constant values are generally interpreted as a raw collection of bits with the sign absent, thus I'd find the -0x01 notation unusual.

author: caroper
author_rank: Regular Contributor
timestamp: June 03, 2012, 08:26:35 pm
content: Thanks to binary arithmetic we have finally solved Shakespeare's famousdilemma.2B OR NOT 2B = -1CheersChris

author: Mechatrommer
author_rank: Super Contributor
timestamp: June 04, 2012, 06:44:42 am
content: Quote from: OP(its been a while). what value will depend on how many bits per byte/register we have and architecture of the "flipflop" (is it the right term?). deducted it to 8bit PIC8 (from your example).. my answer is 0xFF with 1 in carry (or zero) bit. incrementing 0xFF will result in 0x00 with 1 in carry/zero bit.
Power supplies being damaged by ugly loads--solutions? - Page 1
Forum section: electronics / general

author: IanB
author_rank: Super Contributor
timestamp: June 03, 2012, 10:49:43 pm
content: This chap here on another forum has a problem of power supplies failing in use:http://www.candlepowerforums.com/vb/showthread.php?339158-Variable-Regulated-DC-power-supply-type-and-protection-advice-soughtHe is evidently using the supplies to power and test ballasts for HID lamps and similar things. Either due to poor experimental technique or exceeding the limits of the supply he is breaking his supplies.What would be solutions here? Better test protocols? Different or better quality supply? External power supply protection?

author: ModemHead
author_rank: Frequent Contributor
timestamp: June 03, 2012, 11:44:31 pm
content: That chap has arrived here with us:https://www.eevblog.com/forum/beginners/advice-on-purchaseing-a-30-40vdc-50-60-amp-variable-reg-supply/?topicseen

author: Satchmoeddie
author_rank: Contributor
timestamp: June 03, 2012, 11:53:31 pm
content: Why not a 240 VAC Variac @ 10 amps and add a fast blow fuse to the thing if it doesn't have one already. DC power supplies for HID lighting?? I used a vairac with an ammeter and a hi pot testing those things for someone, not a DC supply. Yes, I wanted to shoot myself! I was so bored!

author: IanB
author_rank: Super Contributor
timestamp: June 04, 2012, 12:02:35 am
content: Quote from: ModemHead on June 03, 2012, 11:44:31 pmIndeed so. Please provide any answers here, if you would be so kind:https://www.eevblog.com/forum/beginners/advice-on-purchaseing-a-30-40vdc-50-60-amp-variable-reg-supply/I'm going to lock this topic as surplus to requirements.