hybridfree/eevblog-posts huggingface dataset:
flash memory weight is more when full - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 12, 2012, 10:40:28 am
content: flash memory weight is more when full because of the energy needed to hold the ions in place.similar to how a pack of shuffled cards weighs more than a unshuffled pack of cards

author: T4P
author_rank: Super Contributor
timestamp: April 12, 2012, 10:48:42 am
content: NPNT . Show me the "Digital precision weighing scale" used

author: free_electron
author_rank: Super Contributor
timestamp: April 12, 2012, 12:08:47 pm
content: Wrong... Flash memory is heaviest when empty...Electrons do have mass. That is correct.To erase a cell you place charge on the floating gate .... ( an empty flash reads all ones. A logic one indicates a gate charge. Gate is charged with electrons. ).

author: ejeffrey
author_rank: Super Contributor
timestamp: April 12, 2012, 01:01:56 pm
content: The flash cell has the same number of electrons either way. The gate is a capacitor. To charge it up you move electrons from one side to the other, the total number stays the same. There may be some mass due to the modified energy density (m=E / c^2 and all that), but not due to the electron mass.

author: A Hellene
author_rank: Frequent Contributor
timestamp: April 12, 2012, 01:31:36 pm
content: It is also well known and documented that a human soul weights 21 grams; and that gods do really exist;</kidding>-George

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 12, 2012, 01:56:33 pm
content: double post

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 12, 2012, 02:01:47 pm
content: sohttp://physicsworld.com/cws/article/news/2010/nov/19/information-converted-to-energyneed to put energy in to lower entropy of a system.Ordering of bits provides ability to do useful worki with you guys on this
The Nutter is back! (photonic induction) - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: April 02, 2012, 07:30:23 pm
content: It seems like he wanted a fresh and organized start. His fan will be happy!Alexander.

author: Jad.z
author_rank: Regular Contributor
timestamp: April 02, 2012, 07:35:47 pm
content: Well this song comes to mindhttp://youtu.be/CDGzi-TzoQs?t=22s

author: nixxon
author_rank: Frequent Contributor
timestamp: April 02, 2012, 07:51:16 pm
content: I hope this nutter is back, because he his stunts were really entertaining. I wonder what his neighbours think about his return, though...

author: T4P
author_rank: Super Contributor
timestamp: April 02, 2012, 08:21:41 pm
content: ^they will LOVE him once more

author: Stephen Hill
author_rank: Regular Contributor
timestamp: April 02, 2012, 08:37:35 pm
content: Does anyone know what he does for a living?

author: 8086
author_rank: Super Contributor
timestamp: April 02, 2012, 08:52:25 pm
content: Quote from: Stephen Hill on April 02, 2012, 08:37:35 pmAs I recall, he's a consultant in the power industry

author: Frangible
author_rank: Regular Contributor
timestamp: April 03, 2012, 01:49:07 am
content: I'm glad he's back - he's entertaining. His videos are widely imitated - which was probably the reason he dumped the old channel and is reposting with disclaimers.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: April 03, 2012, 07:49:30 am
content: Awesome! Hope his new channel will work out for him.

author: T4P
author_rank: Super Contributor
timestamp: April 03, 2012, 09:25:48 am
content: Quote from: Frangible on April 03, 2012, 01:49:07 amI was wondering why there wasn't any disclaimers ... Now i know why , he wasn't expecting to need them .

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 03, 2012, 03:26:50 pm
content: now i hope to see more about his reactor project

author: Mint.
author_rank: Frequent Contributor
timestamp: April 04, 2012, 10:53:28 am
content: What happened to him?

author: Monkeh
author_rank: Super Contributor
timestamp: April 04, 2012, 01:25:57 pm
content: Quote from: Mint. on April 04, 2012, 10:53:28 amHe got stressed, threw a tantrum, and started insulting other channels before ragequitting from Youtube.

author: Zero999
author_rank: Super Contributor
timestamp: April 06, 2012, 10:56:01 am
content: Who's AnitBigAnitCleaver? Presumably photonicinduction deleted all the videos and the originals but AnitBigAnitCleaver archived them so managed to bring them back?

author: quantumfall
author_rank: Regular Contributor
timestamp: April 06, 2012, 11:21:24 am
content: Quote from: Hero999 on April 06, 2012, 10:56:01 amI would think he still has all his own copys, the originals they exist somewhere thats for sure.I think he may have had a fright at the cost of legal representation if someone hurt themselves copying him.I have no idea who AnitBigAnitCleaver is but he is probably a fan of Photonicinduction who offered to help.
Tektronix TDS 210 - Page 1
Forum section: electronics / general

author: martysdomain
author_rank: Contributor
timestamp: April 01, 2012, 09:31:21 pm
content: Was wondering what the going price (used) and thoughts were on the above listed scope. Is this a good first scope for someone to own? I've been in electronics for several years and its time for a scope saw an ad for this one, used, with proof that it went back to depot for the recall (I read about that on here). Thanks.

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 02, 2012, 06:20:36 am
content: Seeing as how a new Rigol of comparable performance can be had for US$329...

author: EEVblog
author_rank: Unknown
timestamp: April 02, 2012, 06:39:48 am
content: About the only advantage to it is that it runs silent.Other than that, I wouldn't touch one, when a new Rigol or similar can be had for the same price or less.For some reason the TDS210/220 still commands a decent price on ebay. Probably the Tek fanboys.A great market changing scope in it's day, but it's poor screen, update speed, and memory means it can barely hold up today.IMO, they are probably worth about $200-$300 tops.Dave.

author: martysdomain
author_rank: Contributor
timestamp: April 03, 2012, 04:00:40 pm
content: Thank you all. The one I was looking at was only going for around $200. I'll take a close look see at some of the Rigol products.

author: DavidDLC
author_rank: Frequent Contributor
timestamp: April 03, 2012, 04:08:44 pm
content: Also not very important but.... it is boring to look to a monochromatic screen, get a one with colors, so you can easily distinguish between channel traces and mark your probes as well.

author: mzacharias
author_rank: Frequent Contributor
timestamp: April 04, 2012, 10:50:50 am
content: I had a clean TDS-220 and sold it on eBay; got enough to buy TWO clean Tek 2246 mod A 100mHz analog scopes with cursors, etc and had a couple hundred bucks left over.

author: Magicmushroom666
author_rank: Contributor
timestamp: April 04, 2012, 10:56:33 pm
content: I must admit i've got quite a soft spot for the TDS 210, and would love one for myself when i get one cheap, but that's mainly because it's the scope i both learnt with all through university and used regularly at my first job afterwards! Familiarity certainly counts for something and i often get frustrated on other scopes when i dont know where a setting is!They are getting on a bit now, and the new rigols etc are brilliant with the huge memory, and much snappier interfaces etc, I think your better off with a new one!But hey if you need to do reports etc with screenshots from the unit, there's nothing like the 'Tek' logo in the corner to give reassurance to the reader.

author: FenderBender
author_rank: Super Contributor
timestamp: April 05, 2012, 01:47:14 am
content: The TDS scopes aren't too well documented and you might have trouble fixing them if it becomes broken. Might want to get either an older Tek/HP scope of a newer DSO.
Liquipel applies a nano-coating to electronic Waterproofing ? - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 03, 2012, 12:19:17 pm
content: anyone surprised by this ? (it should play at the right part if not its on dead 27min in

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 03, 2012, 12:24:46 pm
content: thenhttp://leoville.com/still-operating

author: benemorius
author_rank: Regular Contributor
timestamp: April 03, 2012, 11:09:42 pm
content: Quote from: @leolaporte on Twitter
somethings never cease to amaze me - Page 1
Forum section: electronics / general

author: G7PSK
author_rank: Super Contributor
timestamp: April 02, 2012, 09:06:45 pm
content: Is that a soup conductor by any chance.

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 02, 2012, 09:42:53 pm
content: ha ha .nah just iced tea

author: PeterG
author_rank: Frequent Contributor
timestamp: April 02, 2012, 10:06:12 pm
content: Superconductors are cool.Regards

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: April 02, 2012, 10:57:22 pm
content: Has to be my favourite phenomena in nature. So much fun!
Controlling Lightning With Lasers - Page 1
Forum section: electronics / general

author: T4P
author_rank: Super Contributor
timestamp: April 03, 2012, 09:46:22 am
content: http://www.element14.com/community/community/news/blog/2012/04/02/controlling-lightning-with-lasers"Possibly the greatest pioneer in the field of electrical engineering, Nikola Tesla, dreamed of one day controlling lightning. During lightning storms, he would sit and watch in amazement as nature demonstrated its powerful electrical discharges. He successfully simulated electrical discharges up to 7 meters in length using millions of volts produced by his infamous coils. However, controlling nature's powerful forces ended up being one of Tesla's unfulfilled dream."Element14 on facebook :Lightning striking twice? It may not be so unusual anymore: Controlling lightning with lasers, the latest in news:http://ow.ly/a2fBt

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 03, 2012, 01:46:50 pm
content: how about directing the lightning to a pole conductor, send it down to buck converter and store the energy in LA batteries?

author: T4P
author_rank: Super Contributor
timestamp: April 03, 2012, 04:43:00 pm
content: Quote from: Mechatrommer on April 03, 2012, 01:46:50 pm
When does the narwhal bacon? - Page 1
Forum section: electronics / general

author: MrOmigoodness
author_rank: Contributor
timestamp: March 28, 2012, 11:00:41 pm
content: AnyRedditors?

author: harnon
author_rank: Regular Contributor
timestamp: March 28, 2012, 11:38:28 pm
content: meh

author: vk6zgo
author_rank: Super Contributor
timestamp: March 29, 2012, 08:53:21 am
content: "I'm beached as,Bro"

author: metalphreak
author_rank: Frequent Contributor
timestamp: March 30, 2012, 09:51:46 am
content: 4chan.org/EEV/

author: MrOmigoodness
author_rank: Contributor
timestamp: April 01, 2012, 03:21:29 am
content: Quote from: metalphreak on March 30, 2012, 09:51:46 amFFFFFFFUUUUUUUUUUUU
Expensive P-clips!! - Page 1
Forum section: electronics / general

author: Hobgoblin612
author_rank: Contributor
timestamp: March 31, 2012, 07:42:24 am
content: I found this interesting product on Element 14.http://au.element14.com/hellermann-tyton/alu11-alu-na-c1/p-clip-alu-17-5mm-pk100/dp/1827064I don't see any reason why these should be so expensive so I think its just an error in the system.

author: PeterG
author_rank: Frequent Contributor
timestamp: March 31, 2012, 07:52:21 am
content: Well, they do come in packs of 100Regards

author: Hobgoblin612
author_rank: Contributor
timestamp: March 31, 2012, 08:50:10 am
content: Exactly, only 374.92 each, Bargain!

author: Mechatrommer
author_rank: Super Contributor
timestamp: March 31, 2012, 10:10:18 am
content: is it worst than audifoolery cables?

author: PeterG
author_rank: Frequent Contributor
timestamp: March 31, 2012, 10:19:21 am
content: Quote from: Mechatrommer on March 31, 2012, 10:10:18 amOH yes, these must be the 'Special' clips to hold those audio cables.Regards

author: Mechatrommer
author_rank: Super Contributor
timestamp: March 31, 2012, 11:08:50 am
content: so the clip is more expensive than the cable. must be hell of engineering and metalurgy have been put into there. probably made out of unobtainium. funny they only claim its aluminium. i never seen gold so expensive.

author: SeanB
author_rank: Super Contributor
timestamp: March 31, 2012, 11:13:38 am
content: If it was an Aerospace rated and certified unit I would say the price can be in ballpark for certain applications. RS has screws that are $100 plus each, in a M4 size, and do sell them. Of course that will be a Titanium alloy screw, rated to work when white hot. For these clips they would have to be the matching fasteners.

author: Rufus
author_rank: Super Contributor
timestamp: March 31, 2012, 02:20:46 pm
content: Quote from: Hobgoblin612 on March 31, 2012, 07:42:24 amChange country and they are US$ 1 each.

author: Greate
author_rank: Contributor
timestamp: March 31, 2012, 03:18:48 pm
content: This is epic nice find!Sent from my A100 using Tapatalk
"High ripple" electrolytics? Suitable for general PSU usage? - Page 1
Forum section: electronics / general

author: Chris Wilson
author_rank: Super Contributor
timestamp: March 31, 2012, 05:27:21 pm
content: I have a box of new electrolytics a friend donated. There are some 47uF 350 volt electrolytics that the bag states as "high ripple". Can I use these to replace some 30 year old plus generic ones on a power supply board for a transceiver? Thanks.

author: SeanB
author_rank: Super Contributor
timestamp: March 31, 2012, 05:43:14 pm
content: If the originals were 10 - 68uF and the voltage is 200 - 350V and they physically will fit in the position then yes. They will be higher ripple rated and will run cooler than the originals.Only caveat is if the supply has Selenium rectifier stacks or valve rectifiers, then you will need to place a series resistor in the lead from the rectifier to the capacitor, generally something in the order of 10-22R 5W, current depending, to reduce the ripple current through the rectifier to a lower level. These old rectifiers rely on the capacitor being a high resistance to limit the current to a safe level, so then you need extra resistance with the modern low ESR unit. Only needed on the first capacitor, as then you will find that further on there is sufficient series choke or resistance built in to the circuit.

author: Chris Wilson
author_rank: Super Contributor
timestamp: March 31, 2012, 06:54:38 pm
content: Thanks SeanB. They are replacing existing 47uF ones, so value isn't changing. The rectifiers are silicon, so I should be good to go with these then. Good reply, learnt something else again from this, thanks again.

author: FenderBender
author_rank: Super Contributor
timestamp: March 31, 2012, 07:18:18 pm
content: I think High Ripple typically goes hand in hand with Low ESR. So because the capacitor resists less current (Low ESR), then it coincidently produces less heat and thus it has a higher Ripple Current rating.Usually getting these isn't an issue unless it is being used in a circuit where impedance is absolutely critical.

author: SeanB
author_rank: Super Contributor
timestamp: March 31, 2012, 07:24:50 pm
content: Old electrolytic's and high voltage are tricky. Only good thing is that the tolerances are so big that you can go a value or three up or down without problems. The ones you have are probably meant for SMPS input capacitors, and if they are good units you will have 10 years plus of life from them if they are kept cool. At 60c they probably will make 2 years.

author: rbola35618
author_rank: Frequent Contributor
timestamp: April 01, 2012, 12:29:58 am
content: Generally, in switching power supplies the ESR sets the ripple output voltage of power supplys. so if you what low Vripple, you want to us low ESR capacitors. If the ripple current is too high for the capacitor, then you add more capacitor in parrallel to divide the ripple current between all the capacitors. Hope this helps. Best Regards Robert Bolanos
Almost the 3 year Anniversary of EEVBlog - Page 1
Forum section: electronics / general

author: kolbep
author_rank: Frequent Contributor
timestamp: April 01, 2012, 09:52:06 pm
content: HiThe first Blog Dave did wasEEVblog #1 – Rigol DS1052E Oscilloscope ReviwedPosted on April 5th, 2009 EEVblogSo, Thursday will be the 3 Year Anniversary of EEVblog.Just for kicks, go back to this episode :http://www.eevblog.com/2009/04/05/eevblog-1-rigol-ds1052e-oscilloscope-reviwed/And see the Humble Beginnings...Well Done Dave...

author: EEVblog
author_rank: Unknown
timestamp: April 01, 2012, 09:58:07 pm
content: Thanks.It was April 4th actually:https://groups.google.com/d/msg/aus.electronics/FvwX2e93FiY/qRhoPiwzENcJDave.

author: kolbep
author_rank: Frequent Contributor
timestamp: April 01, 2012, 10:05:03 pm
content: Thanks for the correction Dave.I have just been reading that thread nowYou really have come a long way...I also just watched you drowning your wifes lappy again. That always gives me a good laugh...Maybe for your anniversary show you should dress up like a pirate, just for laughs

author: TriodeTiger
author_rank: Regular Contributor
timestamp: April 01, 2012, 11:17:15 pm
content: Pirates should dress up as Dave Jones for kicks, not the other way around.I think he should come up with and sing an anniversary song for us - I am sure occasional viewers would not watch an anniversary episode, leaving us regulars to enjoy it.Alexander.

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 02, 2012, 03:11:22 am
content: does pirate match up with wonder woman? how about superman suit?. and now what about sagan? robin's suit? (batman accomplish, not robin hood)

author: kolbep
author_rank: Frequent Contributor
timestamp: April 02, 2012, 04:53:10 am
content: Alexander, I have added your option as part of the Poll.But maybe he should do both.

author: G7PSK
author_rank: Super Contributor
timestamp: April 02, 2012, 05:54:00 pm
content: If Dave does anything it surely should be that he plays Telstar on Sagans Organ now that he has fixed it.

author: kolbep
author_rank: Frequent Contributor
timestamp: April 04, 2012, 04:41:51 am
content: Happy Birthday EEVBlog.

author: G7PSK
author_rank: Super Contributor
timestamp: April 04, 2012, 07:48:10 am
content: Congratulations Dave on keeping up such a high standard and quantity of output for three years.

author: MrPlacid
author_rank: Frequent Contributor
timestamp: April 04, 2012, 09:16:33 am
content: Happy Anniversary Dave. Now, take the wifey on a vacation!

author: remy_m
author_rank: Newbie
timestamp: April 04, 2012, 11:47:42 am
content: Happy anniversary EEVBlog. Dave keep up the good work.

author: Excavatoree
author_rank: Frequent Contributor
timestamp: April 04, 2012, 02:43:07 pm
content: Happy birthday to the EEVBLOG!!! (and me, too!!!)

author: ivan747
author_rank: Super Contributor
timestamp: April 05, 2012, 02:34:38 am
content: QuoteIt never came up.

author: GeoffS
author_rank: Unknown
timestamp: April 05, 2012, 04:32:21 am
content: Never mind the pirates, will there be cake?
Graphene and high frequency transistors. - Page 1
Forum section: electronics / general

author: diracshore
author_rank: Regular Contributor
timestamp: March 31, 2012, 09:44:28 pm
content: Hi all,Reading the March 15th issue of nature, quite a few articles on graphene. There was a discussion on the difficulties of creating high frequency transistors using graphene. There was a mention of III-V materials such as gallium arsenide and indium phosphide that have been used to create transistors operating at 1 terahertz. Currently the best graphene transistors run at 300Ghz, where as silicon tops out at around 10Ghz.So my question is what is the fastest III-V transistor actually available on the market now ?

author: amspire
author_rank: Super Contributor
timestamp: March 31, 2012, 11:52:37 pm
content: I have no idea about the fastest discrete transistors, but the fastest transistors tend to be transistors embedded into an IC design. The moment you have leads, parasitic capacitances from the packaging, etc, you loose most of the speed.I know for example that working sampling oscilloscope circuits in the lab are pushing towards being able to view 1THz waveforms, but unfortunately they only work with a super-fast risetime edge generated from a Non-Linear Transmission Line on the same chip located microns away from the sampling circuit.Richard.
Need help getting the Thophui TH2822C software... - Page 1
Forum section: electronics / general

author: Aido4ever
author_rank: Contributor
timestamp: March 31, 2012, 02:14:33 pm
content: I've tried downloading it from there website and failed...There website is a mess ...

author: Aido4ever
author_rank: Contributor
timestamp: March 31, 2012, 02:31:25 pm
content: OK, found the program "FastAccess".. can someone help with the driver?
Blinkenlichten Labs Museum. Kind of. - Page 1
Forum section: electronics / general

author: ronwoch
author_rank: Contributor
timestamp: March 28, 2012, 07:36:36 am
content: Don't know if anyone cares or is interested, added a video of my ancient computers collection to youtube. Aside from showing off my collection, I really would like input on what people might like to see more of. IE- a particular machine up and running, or teardowns of particular machines? I am by far from knowlegable on the inner workings of these, and my electronics knowledge is very basic and limited, so don't expect anything on the level of Dave's vids. But if you would like to see the guts of a Kaypro 2X, for example, or an Osborne 1, or an Amiga..... you get the idea.Please, let me know!

author: tekfan
author_rank: Frequent Contributor
timestamp: March 28, 2012, 05:47:23 pm
content: Nice collection you've got there!I spent quite a few weeks repairing two Tektronix 4014 vector graphics terminals for a friend. They're from the late 70's and weigh a ton.Don't ask how we got two of those terminals, a curve tracer, three people and baggage into a single car.Power supply debugging:

author: ronwoch
author_rank: Contributor
timestamp: March 28, 2012, 07:12:31 pm
content: Thank you! I'm pretty happy with it, though I have yet to enter the apple, atari, and trs-80 realms. Or the ti-99.Lots of room for expansion. Sadly, the roughly dozen or so IBM's and compatables I collected throughout my highschool years still sit in my parents shed in NY, and will need some serious restoration when I finally get them brought in to the rest of the fold. I have a few xt's, an at, a 386, a 486, some other stuff. But yeah, have to get that stuff saved. I may have lost the cover to it, which would make me mad, but I THINK I even have a dec rainbow at my parents, it was one my grandmother gave me when I was about 13 or 14. At the time, I had no idea it was anything other than a cheap IBM clone.As to your friends terminals: NICE! I'd love to know more about these. In addition to my Televideo, I hope to add a Lear-Siegler soon. Might have to look into something like this, as well. If I understand correctly, these were used for things like 3-d wireframe, and such, yes? Sooooo much to learn, part of why I love old computers. I am continually blown away by the things I don't know. Capabilities that were decades ahead of their time, or are generally attributed to someone who merely recycled an idea. It's impressive. So much more than the 'In the beginning there was Apple and Microsoft.' story that you hear nowadays.

author: ronwoch
author_rank: Contributor
timestamp: March 31, 2012, 06:51:43 pm
content: A little Necro-posting, but I figured better that than wasting a new thread. Just some new toys for the museum. Enjoy.
Parametric searches - SHIFT and CTRL keys are your friend - Page 1
Forum section: electronics / general

author: bkochis
author_rank: Contributor
timestamp: March 30, 2012, 02:14:10 pm
content: Chris, Dave,On your last podcast (for the Amp Hour) you were ranting, as usual, about parametric searches and wanted to drop a hint you may not be aware of.You can use the SHIFT or CTRL key to change your selection pattern. See attached PDF.When you hold the SHIFT key down and press the mouse button you have selected a sequential list of choices (see first 2 screen shots in attached doc) I wanted a capacitor above 50volts but less than 200v so I held the SHIFT key down and mouse clicked on the first and last item within the range I wanted. I selected ‘apply’ and that voltage range was presented to me, as shown in second screen shot.Later I decided I only wanted specific voltages, so I held the CTRL key down and mouse clicked on each of the specific values I was interested in, as shown in the third screen shot. The results are in the fourth screen shot.The reason this works is that the selection values are presented to the user in an ‘ordered list’ and then the user’s selection is given to the underlying SQL statement that is used for the search.SHIFT and CTRL will generally work with a lot of Windows/Mac/Linux applications on your desktop whenever an ‘ordered list’ is presented, but you will have to try it with the specific application. (Sorry I do not know the Mac keys for this)My apologies for the exhaustive detail in my instructions but it is more difficult to explain via email or a post, versus a voice conversation.Hope this makes life a little less ‘exciting’, as the Chinese curse goes.

author: mariush
author_rank: Super Contributor
timestamp: March 30, 2012, 02:29:30 pm
content: I think he knows. But it doesn't always help.For example, I may be interested in a switching voltage regulator that can accept input between 5-15v. Think how easy it is to use Shift and Ctrl on digikey on this, to select all voltage regulators accepting a minimum of 6v and a maximum of 15vYou can see in the pictures you have regulators capable of much lower maximum voltage mixed with some that work with very high voltages... so you can't just go selecting ranges or selecting individually with ctrl because you go mad until you finish.It would have made more sense to offer a "minimum input voltage" and a "maximum output voltage column" like Farnell does (but farnell also has a lot of flaws in their selection system)
New Free C compilers for Mplab - Page 1
Forum section: electronics / general

author: FreeThinker
author_rank: Frequent Contributor
timestamp: March 30, 2012, 04:05:25 pm
content: Just Found thishttp://www.microchip.com/pagehandler/en_us/promo/mplabxc/may be worth keeping an eye on.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: March 30, 2012, 04:15:48 pm
content: Just looks like renaming & unifying products - can't see anything different to what they did before.

author: Rufus
author_rank: Super Contributor
timestamp: March 30, 2012, 05:02:40 pm
content: Quote from: mikeselectricstuff on March 30, 2012, 04:15:48 pmThey appear to have adopted the Hi-Tech HPA annual maintenance subscription marketing double speak rubbish with tedious and annoying online MAC address bound activation or network license servers for all their compilers which is very different.C18, C30, C32 you bought the compiler and got free updates for ever. Later versions required an installation key but that didn't stop you installing on another computer or re-installing after a computer change or OS re-install.The Hi-Tech system is a complete pain in the arse and their HPA a rip-off. I didn't need HPA because their "we will fix bugs without needing HPA" policy and their compilers being riddled with bugs meant I was always entitled to the current compiler version as a bug fix. After it refusing to activate following an OS re-install I gave up and used a cracked version - much less hassle.The XC range has already been cracked (although not generally available yet), they are not going to make money from this onerous activation and licensing scheme, all they have done is annoy paying customers. Tools specific to their processors should be loss leaders like MPLAB and MPLAB X and all their cheap dev boards anyway.

author: kaz911
author_rank: Super Contributor
timestamp: March 31, 2012, 03:18:24 am
content: I agree - I have C18 - but I do not think I'll update to XC8 Pro.I would go from a "semi" floating license - to a "single pc" bound license - and if the HPA price from Hitec products will be the same - then the HPA for XC8 Pro will be $240 pr. year. FORGET IT...TI's development system cost $499 for floating license and $99 for updates (and covers all processors)TI' Single PC - $445,- - and $99 for updates.Microchop XC8 floating $1295 - and guess about $300 for updatesMicrochop XC8 single $995 - and guess about $240 for updates
Micronta - Page 1
Forum section: electronics / general

author: PUMP
author_rank: Newbie
timestamp: March 28, 2012, 01:11:42 pm
content: hiLooking for information about a Micronta 22-8230 (no other model) variable power supply.If anyone knows or have one please e-mail me Pumpyblue@bell.netAny info would be nice.

author: vk6zgo
author_rank: Super Contributor
timestamp: March 29, 2012, 01:00:04 am
content: Micronta is a RadioShack/Tandy brand,like Archer & a few others.Have you tried Googling for it?

author: vk6zgo
author_rank: Super Contributor
timestamp: March 29, 2012, 01:14:06 am
content: Wait! There's more!Try:http://www.s100-manuals.com/1435360--Micronta_22-8230_0-24V_Regulated_Power_Supply_Schematic.htmORhttp://www.acdcmanuals.com/sm/index.php?itemid=38199&CIRC_Micronta_22-8230_0-24V_Regulated_Power_Supply_Schematic

author: PUMP
author_rank: Newbie
timestamp: March 30, 2012, 04:44:31 pm
content: Thanks for the responseI've got the info needed already,details and schematic except the only info I'm currious about is in which Canadian Radio Shack catalogue 1970-1979 is it showing?I've already checked the American ones.The other would be a copy of the owners manual.Thanks again
hoodies not allowed  - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 30, 2012, 05:33:50 am
content: http://www.telegraph.co.uk/news/picturegalleries/picturesoftheday/9173295/Pictures-of-the-day-29-March-2012.html?page=-4&frame=2180209good on that fella fair play

author: PeterG
author_rank: Frequent Contributor
timestamp: March 30, 2012, 06:52:01 am
content: "We cannot find the page you are looking for."Regards
Cangrats to Sagan. - Page 1
Forum section: electronics / general

author: PeterG
author_rank: Frequent Contributor
timestamp: March 28, 2012, 08:07:21 am
content: Congrats to Sagan for making the final cut in the Bonds competition.Regards

author: Dago
author_rank: Frequent Contributor
timestamp: March 28, 2012, 08:10:14 am
content: Congrats!
Annoying character array parsing with AVR-GCC - Page 1
Forum section: electronics / general

author: slateraptor
author_rank: Frequent Contributor
timestamp: March 26, 2012, 04:49:38 am
content: A quick example using well-defined escape sequences:Code:const char* ArrayExample1 = "\r\nC";Character-wise, this yields:0x0D 0x0A 0x43 0x00...as expected.Switching it up a bit:Code:const char* ArrayExample2 = "\x0D\x0AC";Ok, so I've replaced the well-defined escape sequences with 8-bit hex sequence equivalents and we're expecting the same contents as the previous example, right? Wrong. Actual content:0x0D 0xAC 0x00A third example:Code:const char* ArrayExample3 = "\x0D\x0AG";This correctly yields0x0D 0x0A 0x47 0x00, as expected. Evidently, if the most significant nibble of an 8-bit hex sequence is 0 and an A-F character immediately follows the sequence, the character array won't be parsed correctly in AVR-GCC; leading zero appears to be truncated during parsing by compiler. Meh.

author: IanB
author_rank: Super Contributor
timestamp: March 26, 2012, 05:13:17 am
content: This is actually behaving correctly according to the C language standard and is not a bug. The compiler does not stop at two characters after the \x, it continues to eat all characters that are valid hexadecimal digits until a non-hexadecimal digit is found. In your example, \x0AC is a valid hexadecimal digit string, so the parser captures all of it.The correct way to do what you want is to force a break in parsing where you need it, like this:Code:const char* ArrayExample2A = "\x0D\x0A" "C";Note that in your third example, the letter G is not a valid hex digit so it breaks the parsing of the preceding \x0A at that point.

author: slateraptor
author_rank: Frequent Contributor
timestamp: March 26, 2012, 05:39:52 am
content: Tricky tricky. K&R references syntax for the hex escape sequence as\xhh, which led me to my original conclusion...I should have known better when they used subtle examples like\xband\x7.Thanks for the clarification.

author: IanB
author_rank: Super Contributor
timestamp: March 26, 2012, 05:48:58 am
content: In section A2.5.2 "Character Constants" of my copy of K&R (2nd Ed), it says:The escape \xhh consists of the backslash, followed by x, followed by hexadecimal digits... . There is no limit on the number of digits, but the behavior is undefined if the resulting character value exceeds that of the largest character.Sometimes you have to watch the small print...

author: slateraptor
author_rank: Frequent Contributor
timestamp: March 27, 2012, 05:18:42 am
content: Fortunately, this nuisance caveat wasn't a show-stopper and was easy enough to isolate. Just thought I'd share my inner thoughts as others working on embedded projects here might have something to gain from the observation, or method of identifying the culprit.P.S. The print in that section is rather normal. That the subtle detail was put away in an appendix rather than included in a main chapter is another story.
Recomend a programmable power supply please. - Page 1
Forum section: electronics / general

author: george graves
author_rank: Super Contributor
timestamp: March 25, 2012, 03:22:30 pm
content: I'm in the market for a $200-$300 programmable power supply. I need about 18 volts and a few amps.So far I was looking at these two - but would lover other recommendations! (I was going to wait for dave's unit - but I need next week or two)Tekpower TP3644A Programmable DC Power Supply 0-18V @ 0-5A $250http://www.amazon.com/Tekpower-TP3644A-Programmable-Supply-Connection/dp/B0015VP6XYThe other is a BK Precision 1697 - but that's slightly out of my price range. Unless it's that much better of a supply? ? ? ? $330http://www.amazon.com/BK-Precision-Supply-Single-Digital/dp/B0002Z183Q

author: RRobot
author_rank: Regular Contributor
timestamp: March 25, 2012, 03:32:16 pm
content: I have this one and I like it very much. Note programmable supplies in this price range are typically switching, not linear.http://www.tequipment.net/InstekPSP2010.html

author: rbola35618
author_rank: Frequent Contributor
timestamp: March 25, 2012, 04:44:01 pm
content: The Tekpower is really an Array power supply. Circuit Specialist has the same Array supply at a lower price. They have for 199 dollars. There are three version to chose from.I bought the 0 to 36 Volts @ 3A. I have no complaints about the supply.The link is belowhttp://www.circuitspecialists.com/programmable-bench-power-supply-csi3645a.htmlRobert

author: rbola35618
author_rank: Frequent Contributor
timestamp: March 25, 2012, 04:46:02 pm
content: If anybody is interested, I could do a review of the Circuit Specialist programable supply.Robert

author: george graves
author_rank: Super Contributor
timestamp: March 25, 2012, 04:50:18 pm
content: That would be great. An amazon review mentioned that the display isn't calibrated well at all. Is that true?

author: rbola35618
author_rank: Frequent Contributor
timestamp: March 25, 2012, 05:18:59 pm
content: I remember that is came with calibration data from the unit and it passed its specification. I remember checking the supply against the most accurate meter I have (Amprobe AM140 0.03%) and it was within its spec. I will be very busy this Monday thru Wednesday. I will try to put a video review on Wednesday night or Thurday if my schedule don't change.

author: T4P
author_rank: Super Contributor
timestamp: March 26, 2012, 08:12:43 am
content: http://uk.rs-online.com/web/p/power-supplies/4461601/

author: JuKu
author_rank: Frequent Contributor
timestamp: March 26, 2012, 11:04:16 am
content: I'm currently looking at an Atten unit.
Australian police wardriving - Page 1
Forum section: electronics / general

author: McMonster
author_rank: Frequent Contributor
timestamp: March 23, 2012, 08:36:01 am
content: http://www.theage.com.au/technology/security/police-to-cruise-streets-for-unsecured-wifi-20120322-1vmof.htmlI wonder if they have an adequate supply of chalk for the task.

author: SeanB
author_rank: Super Contributor
timestamp: March 23, 2012, 03:53:33 pm
content: So they have made free wifi a crime? Here it is not so, you get punished by caps quicker. I suppose that they will not get shot at by routers.........

author: slateraptor
author_rank: Frequent Contributor
timestamp: March 24, 2012, 12:01:25 am
content: Child porn my ass. Forensic investigation units are getting way too complacent these days.

author: Unknown
author_rank: Unknown
timestamp: March 24, 2012, 02:43:24 am
content: Australian Police?Isn't the article about Queensland? Little, if anything, to do with Australia!

author: Dago
author_rank: Frequent Contributor
timestamp: March 25, 2012, 09:41:38 am
content: That seems like a good use of police resources... not?

author: Bored@Work
author_rank: Super Contributor
timestamp: March 25, 2012, 11:48:26 am
content: Quote from: Dago on March 25, 2012, 09:41:38 amMaybe they want to collect the data for some other purpose. <insert favourite conspiracy theory here>

author: Mattwarne
author_rank: Contributor
timestamp: March 26, 2012, 06:50:18 am
content: Thats a real waste of police resorces.That would mean no free mcdonalds wifi

author: McMonster
author_rank: Frequent Contributor
timestamp: March 26, 2012, 08:50:19 am
content: I think they're only targeting private ones that should be protected but are not. I think this is a good idea.

author: slateraptor
author_rank: Frequent Contributor
timestamp: March 26, 2012, 09:55:13 am
content: Quote from: McMonster on March 26, 2012, 08:50:19 amDefine "private" and "should".http://www.ex-parrot.com/~pete/upside-down-ternet.html

author: G7PSK
author_rank: Super Contributor
timestamp: March 26, 2012, 10:45:10 am
content: Why wast the time they just need to ask Google for the data.
UNI-T DSO firmware releases ? - Page 1
Forum section: electronics / general

author: Fraser
author_rank: Super Contributor
timestamp: January 04, 2012, 10:28:16 pm
content: Hi all,I have just bought a used UNI-T UTD-1025C DSO and whilst reading the instructions noted a whole section on firmware updating.Has anyone ever seen a UNI-T firmware release made available on their official site ? The manual states that they exist there but I can't find any trace.CheersAurora

author: dean
author_rank: Newbie
timestamp: March 27, 2012, 09:57:05 am
content: I have ATTEN devices and contact with manufacturer. I corresponded with him three months before received a new firmware. I suppose it makes sense to go directly to support the uni-t, but will soon do not wait for an answer.regards, dean.
Sgl Seq Trigger - Page 1
Forum section: electronics / general

author: bubucis
author_rank: Contributor
timestamp: March 25, 2012, 01:35:23 am
content: Can someone please enlighten me on how Sgl Seq trigger mode is supposed to function on the Tek analog scope (in my case 2467).I have read the manual and googled, but it is not clear to me what it is supposed to be doing.Thanks!

author: Rufus
author_rank: Super Contributor
timestamp: March 25, 2012, 05:18:29 am
content: Quote from: bubucis on March 25, 2012, 01:35:23 amI think it is just single shot mode although I can't see how it is re-armed (unless it is an additional function of the mode switch). The Seq bit is something to do with it turning off the graticule illumination so you can record a sequence of single shots with a single long camera exposure.

author: bubucis
author_rank: Contributor
timestamp: March 25, 2012, 05:42:02 am
content: Mode switch does re-arm it, but it seems that one has to push it again to actually trigger a capture. I was hoping for a something like a single shot on a DSO, but there is no persistance, thus I see no real purpose for this trigger mode. 2467 does seem to be a pretty flexible scope though, thanks to is delayed sweep modes.Thanks!

author: Rufus
author_rank: Super Contributor
timestamp: March 25, 2012, 05:54:22 am
content: Quote from: bubucis on March 25, 2012, 05:42:02 amThere is persistence when you have a camera stuck on the front.

author: Mechatrommer
author_rank: Super Contributor
timestamp: March 25, 2012, 06:10:12 am
content: Quote from: Rufus on March 25, 2012, 05:54:22 amtwo things:1) have to be in the dark for long exposure to not to overblown surrounding.2) the old day was film, so i imagine the user have to run quickly to minilab shop to develop the image and hopefully there is trigger. if the tinkering is in midnight, then tomorrow.never have one.

author: vk6zgo
author_rank: Super Contributor
timestamp: March 25, 2012, 06:20:08 am
content: In the old days,the camera was a black & white Polaroid,mounted on a camera holder on the front of the 'scope.The camera could be set to a very long exposure setting,or to one where the thing could be left with an open shutter for as long as necessary.You would have to look through the viewfinder & set every thing up in advance,so you didn't end up with all your exposures on top of each other.We used to do multiple exposures all the time.

author: Mechatrommer
author_rank: Super Contributor
timestamp: March 25, 2012, 06:51:38 am
content: oic i thought it was silver hallide plate where we put our head in a curtain
Helicopter physics - Page 1
Forum section: electronics / general

author: armandas
author_rank: Frequent Contributor
timestamp: March 22, 2012, 07:32:32 pm
content: Check out this insane helicopter action:A second video came out recently, which talks about how helicopters work. Well worth a look.

author: Dago
author_rank: Frequent Contributor
timestamp: March 22, 2012, 08:24:46 pm
content: Yeah fun stuff. I personally have a cheap 450 clone (bit smaller than the one in the video but still a "real" heli) from hobbyking.com. I've spent maybe 300$ on it (including everything, transmitters, batteries, spare parts etc.). Yay for cheap stuff from china!

author: harnon
author_rank: Regular Contributor
timestamp: March 22, 2012, 08:57:14 pm
content: Pretty cool. I wonder how many he's broken!

author: ShiftRegister
author_rank: Newbie
timestamp: March 22, 2012, 09:32:16 pm
content: Awesome !

author: T4P
author_rank: Super Contributor
timestamp: March 22, 2012, 10:19:11 pm
content: You learn something , you break something , all normal .- Dave

author: slateraptor
author_rank: Frequent Contributor
timestamp: March 22, 2012, 10:48:06 pm
content: That's pure awesome. I'd probably chop my head off if I ever took the controls on one of those.

author: sonicj
author_rank: Frequent Contributor
timestamp: March 23, 2012, 05:44:51 am
content: wonder if he is going to explain blade farts?-sj

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: March 23, 2012, 05:54:15 am
content: want!

author: Psi
author_rank: Super Contributor
timestamp: March 23, 2012, 11:38:25 am
content: Somewhat more serious when real sized helis are seen doing stunts like that....http://www.military.com/video/military-aircraft-operations/crash-landings/insane-apache-crash-in-afghanistan/1518984816001/
cool geeky chick - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 21, 2012, 08:47:49 am
content: oh she'll piss anywhere this girl.in this one she boils here own urine down for her collection eeerrrrrr nasty

author: dics
author_rank: Contributor
timestamp: March 21, 2012, 11:57:38 am
content: Just like this one

author: DavidDLC
author_rank: Frequent Contributor
timestamp: March 21, 2012, 05:51:03 pm
content: Don't marry the girl !!!Or is it too late ?

author: G7PSK
author_rank: Super Contributor
timestamp: March 21, 2012, 06:19:03 pm
content: That's got to be staged, no ones that dim.

author: Psi
author_rank: Super Contributor
timestamp: March 21, 2012, 09:55:14 pm
content: Quote from: G7PSK on March 21, 2012, 06:19:03 pmDid you hear that phone call recording from some big department stores helpdesk many years ago?I cant remember the exact details but someone saw a product on sale with the price labelled like "9.50" and then the symbol for cents. So like "9.5c"The caller was trying to explain to them that this is 9.5 cents and not 9 dollars 5 cents. They totally couldn't understand it. was pretty funny.

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 22, 2012, 09:47:40 am
content: Quote from: DavidDLC on March 21, 2012, 05:51:03 pmhell marry her endless hours of fun when the lust wears off.

author: slateraptor
author_rank: Frequent Contributor
timestamp: March 22, 2012, 01:40:48 pm
content: Quote from: dics on March 21, 2012, 11:57:38 amThe things you could get away with...that one's a keeper. LMFAO!!

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: March 22, 2012, 02:28:01 pm
content: When I see stuff like that, I start to wonder why they were recording...

author: SeanB
author_rank: Super Contributor
timestamp: March 22, 2012, 07:39:25 pm
content: The guy is blonde too, he just used dye..............I knew a blonde girl once, she was 6 months along before the doctor told her what was happening.
Original Series 70 range switch feel question - Page 1
Forum section: electronics / general

author: retiredcaps
author_rank: Super Contributor
timestamp: March 21, 2012, 06:59:54 am
content: Since I have purchased all my Fluke multimeters used, I have no idea how the range switch on the Fluke 75 is supposed to "feel". I have a Fluke 83-3, Fluke 117, and Fluke 27II. These 3 have the solid feel and "snaps" into place.The well worn and probably 25 year old Fluke 75 is very "spongy" and it can sit in between range settings. The Fluke 75 has no click or snap.So the question to all the long time original Fluke 70 series owners, can you describe the range switch feel? When new, is it anything like a Fluke 8x-3 series?

author: EEVblog
author_rank: Unknown
timestamp: March 21, 2012, 09:51:47 am
content: I remember it always being a bit spongy, and being able to hold the switch between the ranges.Dave.

author: ModemHead
author_rank: Frequent Contributor
timestamp: March 21, 2012, 11:55:02 am
content: I have a number of 70-series meters (about one step on the staircase scale.) I would say the "spongy" range switch is normal. I think the design intent was to allow you to rotate the dial with a single finger from the side.I purchased all of mine in various conditions from beat-up to like-new, and the only problem I encountered in the range-switch mechanism is that the tiny little molded-in posts that stop rotation can be sheared off by a heavy-handed user. I repaired those with tiny self-tapping screws. Otherwise it seems to be a pretty robust design, despite it's feel.

author: retiredcaps
author_rank: Super Contributor
timestamp: March 22, 2012, 03:47:37 am
content: Dave, ModemHead,Thanks for your feedback. I was a bit worried because even the cheap 99 cent ebay 830 hard plastic multimeters have a more positive feedback than my Fluke 75.
cannot believe the price difference - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 21, 2012, 11:40:36 am
content: http://www.google.co.uk/products/catalog?hl=en&sugexp=frgbld&gs_nf=1&cp=11&gs_id=3&xhr=t&q=C6074-60400&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&biw=1024&bih=649&um=1&ie=UTF-8&tbm=shop&cid=1365297169053125827&sa=X&ei=W7xpT_yKMeSk0QWm

author: T4P
author_rank: Super Contributor
timestamp: March 21, 2012, 04:59:26 pm
content: Saw £105.00 for a used one . DAFUQ ?And the next worst one is £47.38 .None of them are even below or at 24pounds