hybridfree/eevblog-posts huggingface dataset:
Which multimeter or company started 830 design case that is so widely copied - Page 1
Forum section: electronics / general

author: retiredcaps
author_rank: Super Contributor
timestamp: March 03, 2012, 05:35:50 am
content: I'm just curious which company or multimeter started the trend of the black hard plastic case "830" design that is so widely copied by low cost manufacturers and commonly found on ebay?See attached picture.

author: Joshua
author_rank: Regular Contributor
timestamp: March 03, 2012, 05:50:11 am
content: They are probably all made in the same company. Thus one component steered the 'trend' and have caught onto it themselves. That's my impression at least.

author: tom66
author_rank: Super Contributor
timestamp: March 03, 2012, 10:49:29 am
content: It was probably Mastech. The DT830B is made by another company.

author: Bored@Work
author_rank: Super Contributor
timestamp: March 03, 2012, 11:02:31 am
content: That particular DT830 is probably made by E-Sun.In general my guess would also be that Mastech came up with that design. But that is really just a guess, because the majority of 830's I have seen come from Mastech.It could also be, again a guess, that this originated from some Chinese government-issued design for some standard multimeter, e.g. to be used in large quantities in education, military or certain applications.

author: amyk
author_rank: Super Contributor
timestamp: March 04, 2012, 12:21:37 pm
content: I think the ICL7106-based 3.5-digit design originated from some kit in the 80s.Here's a mention of the Elenco M-1005K in a book from 1998:http://books.google.ca/books?id=ncwNwKySETEC&pg=PA119&lpg=PA119&source=bl&ots=FP-0k-cp36&sig=DX2lYV4K1dzkLHZLh7UsJWxXIes&hl=en&redir_esc=yThe kit's instructions show a date of 1996:http://www.tequipment.net/pdf/Elenco/m-1005k.pdfI'm not sure if the 830 originated before or after that, but it's also available in kit form:http://image.made-in-china.com/2f0j00JBcTPOvyyouC/Digital-Multimeter-DT830B-Teaching-Kits.jpg

author: retiredcaps
author_rank: Super Contributor
timestamp: March 04, 2012, 12:34:52 pm
content: @Amyk, thank you so much for all the links. I will study them. I have 3 dead el-cheapo multimeters and I'm trying to learn more about electronics and how to repair them.@tom66, Joshua, BoredAtWork, thanks for all the information and your feedback. One of the dead ones above is a Mastech.

author: nukie
author_rank: Frequent Contributor
timestamp: March 06, 2012, 12:29:31 am
content: My 1992 meter based on the date code of the UMC UM7106 chipset is build by Mastech according to the PCB (model 831-2)
dr george claude what a visionary - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: March 05, 2012, 10:45:19 am
content: What year was that?Dave.

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 05, 2012, 10:52:41 am
content: 1930

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 05, 2012, 10:54:27 am
content: http://blog.modernmechanix.com/2007/10/25/harnessing-the-power-of-the-sun/

author: SgtRock
author_rank: Unknown
timestamp: March 05, 2012, 11:15:01 am
content: Greetings EEVBees:--Indeed it is amazing what a short way this technology has come in just 8 decades.“Injustice is relatively easy to bear; what stings is justice."H. L. Mencken 1880 - 1956Best RegardsClear Ether

author: saturation
author_rank: Super Contributor
timestamp: March 05, 2012, 06:17:24 pm
content: Israel has had a similar pipe system in operation since 1984, to generate power using the thermal gradients in the Dead Sea. However, its just not enough for the demand these days, and human development has siphoned water out of the Dead Sea, leading to dropping water levels. They are now changing the scope of power generation there to something more traditional: waterflow by tunneling into the Mediterranean.
Wireless ESD straps & stylish charge dispersing tiara - Page 1
Forum section: electronics / general

author: Pat Pending
author_rank: Regular Contributor
timestamp: February 27, 2012, 07:45:17 pm
content: Check Ebay for the terms "wireless esd" to find a wireless esd strap!!The site sums it up well - check out the Cu tinsel charge dissipating tiara - very cool.http://www.esdjournal.com/techpapr/sfowler/wireless.htmNow imagine a tinfoil hat with a fringe!

author: SeanB
author_rank: Super Contributor
timestamp: March 04, 2012, 04:16:13 pm
content: At least it is better than the old antistatic method I saw - use a nice Americium source to make alpha particles to provide an ionising path. You used to be able to buy them for vinyl records to reduce static and hiss.

author: Randall W. Lott
author_rank: Regular Contributor
timestamp: March 05, 2012, 06:48:36 am
content: You're too far behind. I've already gotten my anti-static toothpaste.
Kilogram reference - Page 1
Forum section: electronics / general

author: IanB
author_rank: Super Contributor
timestamp: February 26, 2012, 07:10:39 am
content: And?

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: February 26, 2012, 12:51:58 pm
content: Actually I think that reference will be soon be (or maybe already is) obsolete.Scientists are working on polishing a near perfect sphere out of pure silicon. The idea is to count the number of atoms in the sphere and thus compute the exact weight from that.http://www.theage.com.au/news/national/making-an-exact-difference/2007/06/14/1181414466901.html

author: saturation
author_rank: Super Contributor
timestamp: February 26, 2012, 02:14:47 pm
content: Yes, soon, due to chronic instabilities:http://en.wikipedia.org/wiki/Kilogram

author: SeanB
author_rank: Super Contributor
timestamp: February 26, 2012, 05:01:05 pm
content: You mean my 1g calibration masspiece is no longer valid? 1.00000g on last certification against a national standard. I almost never use it, rather the 100g in the same box, or the 20, 10 and 5kg masspieces. Nice having a standards lab nearby, they have a lovely display of old standards and comparators in the foyer. Interesting to look into the metrology lab as well.

author: Unknown
author_rank: Unknown
timestamp: February 26, 2012, 09:45:53 pm
content: Quote from: IanB on February 26, 2012, 07:10:39 amWould be more interesting in the form of sausages!

author: saturation
author_rank: Super Contributor
timestamp: February 27, 2012, 12:51:43 am
content: A common problem is every time its taken out of its protective case, the metal absorbs some water vapor or dirt, increasing its weight. So the cleaning has to standardized and effective, to maintain its tolerances. A bigger problem is if the cleaning removes small amounts of the metal, and also reduces its weight.The importance of this trivial issue is that the standard is a kg, not a mg or ug, so small variations may influence the smaller values quiet largely.Quote from: SeanB on February 26, 2012, 05:01:05 pm

author: SeanB
author_rank: Super Contributor
timestamp: March 04, 2012, 05:48:13 pm
content: I think the errors divide and multiply to scale with the measurand. Only problem is the other reference masses are gaining with respect to the reference, so they are looking to do a final change to reference to a physical constant. That will allow reproduction of the standard mass anywhere, and will mean a large sale of polished Si balls that are flat down to the atomic level, and whose mass is known down to the atom.No effect on the gross scale, just a thing to do if you are measuring at the limits of resolution. At least now you will have the Whole SI measurement system in a form that can be reproduced without any other than physical properties of matter and physical constants.
Electronics Jobs for Beginners in UK - Page 1
Forum section: electronics / general

author: ssdonsraj
author_rank: Newbie
timestamp: March 04, 2012, 09:08:40 am
content: Hi all..I know it's a tough time in the UK job market. I have been looking to get a job in Electronics Engineering for the last two years. I should have applied for more than 300 or may be 500 jobs through agencies. Now I got an information through some of my friends that the jobs posted by agencies are fake. They are just posting it to get some CVs everyday. So can anyone please suggest me some good ways to enter into the UK electronics industry. Please help. I really need someones help. I have been struggling for ages......Thanks.

author: 8086
author_rank: Super Contributor
timestamp: March 04, 2012, 11:46:01 am
content: When you say beginners...I assume you have some EE qualification?I am not sure you are right in what you're saying about agencies, at least for the jobs I have applied for they actually exist.

author: Neilm
author_rank: Super Contributor
timestamp: March 04, 2012, 11:50:12 am
content: The trouble with agencies is that the good ones are good, the bad ones - not good. When I was searching I found some adverts fake, some were real vacancies that had been filled but the agency left them up to boost the numbers on the site. I once saw an advert for a company that was just being wound up - they had just made me redundant.Look at the adverts and see if they appear on several agencies. The wording usually stays the same so it is easy to see if the job is legit. However most jobs in the UK are not advertised - they are filled by word of mouth or by an HR department having flagged a CV they have received.I would recommend just putting some contact details on your CV, no exact address, no exact date of birth. This will reduce the chance of anyone being able to clone your identity.Above all, include a covering letter that highlights your strengths and your compatibility with the job in question. This should be tailored for each application.Good luckNeil

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: March 04, 2012, 11:51:56 am
content: Agencies will be more interested in higher-paid jobs so there is space for their commission - at the starter end , you may be better off avoiding agencies and just writing direct to all the companies you can find within your target industry and geographical area.
Microsoft shows off their transparent 3D desktop prototype!!! - Page 1
Forum section: electronics / general

author: Spiro
author_rank: Contributor
timestamp: March 02, 2012, 11:59:34 pm
content: http://hackaday.com/2012/03/01/microsoft-shows-off-their-transparent-3d-desktop-prototype/Wow. Nothing new. I first saw this 20 years ago.It was used by Jean-Luc Picard on Enterprise on his desk as video phone

author: Psi
author_rank: Super Contributor
timestamp: March 03, 2012, 01:38:31 am
content: I think i'll wait until we have transparent curved displays with zero bezel.

author: david77
author_rank: Frequent Contributor
timestamp: March 03, 2012, 01:42:30 am
content: I think I'll give it a pass. These new fangled displays have crap contrast.

author: slateraptor
author_rank: Frequent Contributor
timestamp: March 03, 2012, 04:00:20 am
content: Quote from: Psi on March 03, 2012, 01:38:31 amThat technology isn't too far away. Our pilots are already using it in the form ofJHMCS.

author: Unknown
author_rank: Unknown
timestamp: March 03, 2012, 04:23:48 am
content: Quote from: Psi on March 03, 2012, 01:38:31 amYou can achieve similar results with a strategically placed chrome kettle.
Do all Aussies have this sense of humor? - Page 1
Forum section: electronics / general

author: Lightages
author_rank: Unknown
timestamp: March 05, 2012, 06:22:25 am
content: http://www.wimp.com/radiopresenter/I don't know whether to laugh or roll on the floor and laugh.

author: Teknotronix
author_rank: Regular Contributor
timestamp: March 05, 2012, 07:18:20 am
content: LOL!!!!

author: Teknotronix
author_rank: Regular Contributor
timestamp: March 05, 2012, 07:23:32 am
content: This is the radio station if some of you feel the need to callhttp://www.2re.com.au/radio_program.htm

author: Unknown
author_rank: Unknown
timestamp: March 05, 2012, 07:33:40 am
content: Amateur stuff! With the best Aussie humour foreigners don't even know it is happening.

author: Simon
author_rank: Unknown
timestamp: March 05, 2012, 07:48:06 am
content: hahahaha, people must hate this guy or he must be a well known idiot, or they just get bored in Australia

author: vk6zgo
author_rank: Super Contributor
timestamp: March 05, 2012, 07:51:28 am
content: Unc is kidding you all the time
Lattice changing their logo today.. I still like the old one. - Page 1
Forum section: electronics / general

author: codeboy2k
author_rank: Super Contributor
timestamp: February 29, 2012, 01:38:39 pm
content: Lattice Semiconductor announced they are changing their logo effecting immediately.I like the old logo better. They are also removing all references to device and platform from their chips, like MachX02, ECP3, SC, SCMThese are all gone from the tops of the chips now.The product will still work as before of course, but I don't know who in Marketing thought it would be better to NOT tell us what chipwe are looking at.Full details here:http://www.latticesemi.com/documents/doc44912x28.pdfpictures of the new logo and markings are attached.

author: EEVblog
author_rank: Unknown
timestamp: February 29, 2012, 10:43:52 pm
content: Some consultant took their money and ran, no doubtDave.

author: siliconmix
author_rank: Frequent Contributor
timestamp: March 01, 2012, 10:44:58 am
content: that is nuts .why bother

author: LEECH666
author_rank: Frequent Contributor
timestamp: March 02, 2012, 01:02:00 am
content: Maybe they want to save some cents with the product marking process, now that they removes the customized logos from the partmarking.

author: Pat Pending
author_rank: Regular Contributor
timestamp: March 02, 2012, 06:22:48 am
content: The new short form logo (9 skewed boxes), reminds me of Freescale.

author: metalphreak
author_rank: Frequent Contributor
timestamp: March 02, 2012, 09:23:09 am
content: I'm at least 2x as likely to be using them in my future projects with that sexy modern logo on them.

author: Unknown
author_rank: Unknown
timestamp: March 02, 2012, 09:49:20 am
content: Isn't Lattice the traditional base for a New Zealand Salad?

author: Bored@Work
author_rank: Super Contributor
timestamp: March 02, 2012, 09:56:41 am
content: Quote from: metalphreak on March 02, 2012, 09:23:09 amAnd I will throw a baby shower to welcome the new logo.
DDR pad hack - Page 1
Forum section: electronics / general

author: RPuccetti
author_rank: Newbie
timestamp: March 01, 2012, 03:33:49 am
content: Hi guys,I came up with an idea I thought would be fun to try out. I want to use one of those dance pads for games like world of warcraft, starwars, or league of legends. This is what I picked up:http://www.amazon.com/Ultimate-Dance-Pad-Mat-PC/dp/B002LIL42C/ref=sr_1_1?ie=UTF8&qid=1330572573&sr=8-1I plugged the double usb into my pc and it finds it, unfortunaly I can't tell if I'm getting any kind of output. I downloaded a game called stepmania to see if I could get a response but had no luck. Does anyone know a way I could get these pad buttons to toggle keystrokes of my choice?Roman

author: sacherjj
author_rank: Frequent Contributor
timestamp: March 01, 2012, 05:07:04 am
content: That doesn't look like a standard DDR pad. There is usually just 4 arrows. Front Back Left Right. That is it.

author: TerminalJack505
author_rank: Super Contributor
timestamp: March 01, 2012, 05:08:11 am
content: Did you see this page regarding stepmania?:http://www.stepmania.com/wiki/Configure_Keyboard_and_Dance_PadsI don't know anything about these things but it sounds like it will just like a joystick (or two?) so far as the PC is concerned.So far as making it toggle keystrokes, I don't know. Someone out there has probably made some kind of hack to do that.

author: Semantics
author_rank: Contributor
timestamp: March 01, 2012, 05:16:02 pm
content: What you want isJoy2Key. For more advanced stuff, check outAutoHotKey.
PTV12010W inductor gets hot - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: March 01, 2012, 04:11:34 am
content: I have a TI PTV12010W voltage regulator module supplying the 5V rail in a small desktop computer. At a 2A load (the regulator is rated for 8A), the inductor is too hot to touch, but it otherwise seems to work fine. Any ideas why it is getting that hot at 1/4 the rated load? (I have used a similar module in a homemade router and it also got hot, yet worked flawlessly for over 3 years.)

author: sacherjj
author_rank: Frequent Contributor
timestamp: March 01, 2012, 04:39:21 am
content: Many electronics devices work perfectly well hotter than it is safe to touch. As the difference in temperature between the part and ambient increases, so does the thermal energy transfer. These modules look like they are rated to 85 degree C operating temperature, which is much hotter than I would like to touch.

author: TerminalJack505
author_rank: Super Contributor
timestamp: March 01, 2012, 04:48:30 am
content: Is it getting enough airflow?The attached is from the datasheet.

author: NiHaoMike
author_rank: Super Contributor
timestamp: March 01, 2012, 05:42:29 am
content: It seems unusual that the inductor is getting that hot at such a small load. It's particularly a problem since there are two nearby electrolytic caps that are very close to the inductor. Looks like I'll need to move those caps... I powered up a similar PTH12000W module and it's getting hot even with no load, so it must be some quirk with the design that seems to be based on an Intersil chip.

author: NiHaoMike
author_rank: Super Contributor
timestamp: March 02, 2012, 04:14:39 am
content: I replaced the inductor and now I know what the problem was. The original inductor was wound with a flat, thin wire and was very small physically. Thus it had significant losses and the small size (and surface area) means that even a little heat made it hot. The new inductor was a toroid, which has a much larger wire size and surface area. Now it only runs warm at full load. I expected a lot more out of that TI product but I guess they really wanted to get the entire module within a certain size spec...
Questions on drift and tolerance - Page 1
Forum section: electronics / general

author: SmallWalrus
author_rank: Contributor
timestamp: February 29, 2012, 05:17:38 am
content: Hi guys,I've been parts shopping for a little project that I'm looking to build, and I got stumped by this. The build requires a very exact matched pair of capacitors giving as close a total capacitance as possible to 1020pf (within 0.5% tolerance).I noticed that RS has some silver micas that are rated to 1% tolerance for 1000pf which I can then combine it with another small silver mica rated to 0.5% tolerance, and get my 1020pf.Alternatively, I can grab a LC meter and head down to the nearby electronics shop and cherry pick out some silver micas that are rated at 5% tolerance from their shelf. The store silver micas are much much cheaper.My big question stems from the concept of tolerance and drift. Is tolerance only relevant for the actual measurement of a component with respect to it's rated value? Or will a component that was originally built to tighter tolerance be less susceptible to drifting as well?I guess my queries can be summed up as, "Will I score a better deal (and not compromise anything) if I cherry pick out some nice 1000pf caps from the store, as opposed to getting the more pricey ones from RS?"

author: amspire
author_rank: Super Contributor
timestamp: February 29, 2012, 07:10:02 am
content: Capacitors are not the most stable of components in general which is why 1% tolerance and less is fairly rare. Also capacitors change in capacitance with frequency, so a precision reference capacitor of 0.01% or better will specify a frequency and temperature.Silver mica can be one of the more stable capacitors, but there are many different grades of mica, and you don't know what grade is in the 1% caps. But it is probably going to be as good a capacitor as you can get at an affordable price. 1020pf is only 2% above 1000pf so you will probably want a range of low values to get the caps to exactly match. Using 5% NPO ceramic capacitors in the 10pf to 30pf range would be fine - paying for a 0.5% 20pF capacitor is a bit ridiculous as the final value will change with simple things like the lead length.To get them matching, you could use a high resolution LCR meter, but otherwise just make a simple bridge with two matching resistors in one leg and the two capacitors in the other leg. There is a bit of technique getting a really accurate balance from a bridge circuit, but it is definitely possible to get a super match with fairly simple equipment.Richard.

author: BravoV
author_rank: Super Contributor
timestamp: February 29, 2012, 07:21:09 am
content: Quote from: amspire on February 29, 2012, 07:10:02 amRichard, would you mind share & explain more bout this "fairly simple equipment" setup, maybe a simple sketch ? Really curious here.
hantek DSO5202B problem - Page 1
Forum section: electronics / general

author: nordiste
author_rank: Newbie
timestamp: February 28, 2012, 07:46:08 am
content: hi,i bought hantek DSO5202B some days ago and i have a problem.when i start it, it make good statup, but when graph is displayed, i can't do nothing.it doesn't respond.if i connect it using USB, it is see from computer but software says "timeout.does someone have same problem with this scope ?thanks.marc

author: PeterG
author_rank: Frequent Contributor
timestamp: February 28, 2012, 08:03:33 am
content: I would take it back to the supplier and get them to check it out, it looks me to be a warranty issue.Regards

author: nordiste
author_rank: Newbie
timestamp: February 28, 2012, 08:15:31 am
content: i've see the last page of DSO hack - get 200MHz bw for freeand the response looks to be inside.sorry for that post.
Has anyone ever seen anything like this? - Page 1
Forum section: electronics / general

author: MarkS
author_rank: Unknown
timestamp: February 29, 2012, 03:37:43 am
content: Granted, the resolution and accuracy could be improved, but has anyone ever even tried to model a magnetic field in 3D directly from an actual magnetic field? He basically inscribed the field in foam. Not sure what use this would have, but sometimes it helps to visualize things.Fair warning! His silly comments regarding magnetism are painfully stupid. Just mute it and watch. The actual, interesting part doesn't even start until 3:12, so skip ahead.
Blinky Ball - Page 1
Forum section: electronics / general

author: Griffin
author_rank: Unknown
timestamp: February 20, 2012, 08:59:12 pm
content: Hi Every1New to the forum but I've been following Dave for some time now, so hello all you smart ppl. On to business. I also follow another forum hackaday.com. Has anyone seen the post on the Blinky ball:http://www.kickstarter.com/projects/charliex/blinky-ballhttp://charliex2.wordpress.com/2012/02/11/the-blinky-ball-nullspacelabs/In short this is SO COOL and I want one. Anyone thinking of maybe building a much smaller(not that small though) scale one or will it become useless after a while?

author: harnon
author_rank: Regular Contributor
timestamp: February 20, 2012, 09:12:35 pm
content: Looks kind of cool, although $250 is quite a lot for an interactive christmas tree decoration!

author: Griffin
author_rank: Unknown
timestamp: February 20, 2012, 09:15:46 pm
content: I know, thats why I was thinking more in the line of 8 sides with 8 leds (total 64)?

author: codeboy2k
author_rank: Super Contributor
timestamp: February 28, 2012, 09:31:37 am
content: Fun and cute, but I think it's totally under-thought and over-engineered. Plus, way too expensive.It's not even indestructible, she almost dropped it at the end of the video... oops.. there goes $250 you didn't need anyways.
This song inspired Futurama theme song - Page 1
Forum section: electronics / general

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: February 28, 2012, 02:07:26 am
content: Pretty cool. They should have used this for the theme "as is".

author: nanofrog
author_rank: Super Contributor
timestamp: February 28, 2012, 07:23:47 am
content: BTW, how did you come across this?

author: Write_to_Smokegenerator
author_rank: Regular Contributor
timestamp: February 28, 2012, 09:29:12 am
content: you can hear that this song clearly influenced the Futurama Theme, I like both of them
Amazon and EEVblog - Making Sure - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: February 15, 2012, 02:02:30 am
content: Greetings EEVBees:--I finally placed that promised order for Popcorn and Salt, with Amazon.com, making sure to use the EEVblog, Amazon window. I saved a lot of money, as you can see, and hopefully they will remember to credit the EEVblog account."Shipping Details : (order will arrive in 1 shipment)Order #: 105-9828298-0213066 14FEB12Shipping Method: FREE Super Saver ShippingItems: $26.10Shipping & Handling: $13.52Super Saver Discount: -$13.52------Total Before Tax: $26.10Estimated Tax To Be Collected: $0.00------Order Total: $26.10Delivery estimate: Feb. 21, 2012 - Feb. 27, 20121 "Paragon Bulk Bag Yellow Corn (12.5-Pounds)"Sports; $16.69In StockSold by: Amazon.com1 "Popcorn & Nut Salt - 24 oz"Misc.; $9.41In StockSold by: ToysNGamesEtc"--I posted the details here (personal information redacted), so that after a month or two, Dave Jones can check and make sure the system is working as it should. I have a friend who has a major website, who had some problems, with a different major supplier's (Not Amazon) click through commissions. All good now, but it never hurts to check. As my uncle Ronny used to say "Trust, but verify."--If anyone else would like to do the same, please feel free. Admin can delete the thread when it becomes superfluous."I wear suspenders and a belt. I am a security man all the way"Justin Wilson (The Cajun Cook) 1914 - 2001Best RegardsClear Ether

author: slateraptor
author_rank: Frequent Contributor
timestamp: February 15, 2012, 09:12:18 pm
content: I recall Dave ranting about some issue with Amazon not allowing wire transfers of commission to non-US bank accounts...something to do with Amazon sending international checks and how much of a pain in the ass it was to cash it.

author: EEVblog
author_rank: Unknown
timestamp: February 16, 2012, 11:53:04 am
content: Quote from: slateraptor on February 15, 2012, 09:12:18 pmYeah, it's a pain, costs money, and takes a month or two to clear, so I upped the limit to the max so they only send a cheque when it reaches that limit.But rest assured that I do get it!Dave.

author: EEVblog
author_rank: Unknown
timestamp: February 16, 2012, 11:55:28 am
content: Quote from: SgtRock on February 15, 2012, 02:02:30 amYep, I can see your items in my account, thanks!BTW, some people do order the weirdest stuff, but luckily for all concerned I can't see who ordered what.Dave.

author: sacherjj
author_rank: Frequent Contributor
timestamp: February 16, 2012, 03:51:07 pm
content: Quote from: EEVblog on February 16, 2012, 11:55:28 amI swear that full sized bunny suit wasn't for me, Dave. It was uhh... It was a gift.

author: slateraptor
author_rank: Frequent Contributor
timestamp: February 16, 2012, 04:15:27 pm
content: Quote from: EEVblog on February 16, 2012, 11:55:28 amI swear it wasn't for me...well, sorta.

author: Randall W. Lott
author_rank: Regular Contributor
timestamp: February 28, 2012, 06:54:04 am
content: Quote from: slateraptor on February 16, 2012, 04:15:27 pmHahahaha!
Peculiar Offerings From Wun Hung Lo - Green Desoldering Foam - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: February 27, 2012, 08:33:18 pm
content: Greetings EEVBees:--Please see, below, picture of the "Green Desoldering Foam". But, not to worry, an explanation of its use, is provided. See link and quote:http://www.ebay.com/itm/10pcs-3-5-5-cm-solder-green-desoldering-foam-/370293791325?pt=LH_DefaultDomain_0&hash=item56373ada5d"how to use1 place the desoldering wick over the solder tobe removed , then push the heated soldering .iron tip onto the desoldering wick . The solderhas been absorbed2 remove the desoldering wick after the solder has been absorbed3 cuf off the used section of the wick using nippers.4 repeat steps1,2 if the solder is not removed completely. Absirbablitity may deffer depending on the type ofsolder . sn36% and 60% ?tincotent?have good absorbabilityhys000642"--I really like step 2. I used to work for gentleman whose first language was Spanish. One day I attempted to curse profanely en Español. My friend very nearly peed his pants, laughing. So, indeed, I have been on the other end of the shtick, playing the buffoon.--If you have encountered similar products you may post them here, if you wish. As Wun says: "Happy for you to desoldering, please""Does not squirrel crack nuts on bough of oak tree."Lao Fu 1410 1620Best RegardsClear Ether

author: Rufus
author_rank: Super Contributor
timestamp: February 27, 2012, 08:43:53 pm
content: Quote from: SgtRock on February 27, 2012, 08:33:18 pmI used to have a Spanish motorbike. The english handbook included an instruction to grease all whirling parts

author: Simon
author_rank: Unknown
timestamp: February 27, 2012, 09:34:59 pm
content: haha, I think they mixed solder wick with the sponges used to clean the soldering iron tip

author: wkb
author_rank: Super Contributor
timestamp: February 27, 2012, 09:47:16 pm
content: Quote from: Rufus on February 27, 2012, 08:43:53 pmAh, yes, lets grease the whirling disc brakes

author: Simon
author_rank: Unknown
timestamp: February 28, 2012, 06:48:36 am
content: so that is why my cars back wheels are squeaking, need some oil
Hi! I'm new! - Page 1
Forum section: electronics / general

author: HighMans
author_rank: Contributor
timestamp: February 25, 2012, 07:48:01 pm
content: Hello, My nick name is Roadran422, I'm currently a freshman in HS and I literally have and know almost nothing about electronics. But soon that will be fixed. I have no lab what so ever, and the only thing I have is a 10$ Radio Shack Soldering iron, with no solder... Justs wanted to say Hi all!

author: Blofeld
author_rank: Regular Contributor
timestamp: February 25, 2012, 09:52:27 pm
content: Hi Roadran, this video might be interesting:http://www.eevblog.com/2011/04/30/eevblog-168-how-to-set-up-an-electronics-lab/

author: PeterG
author_rank: Frequent Contributor
timestamp: February 25, 2012, 10:20:13 pm
content: Welcome Roadran,a lot can be done with just a $10 soldering iron and a screwdriver or two. See if you can pick up a cheep multimeter(and stay away from high voltages), this will get you set up for most things ahead of you. If you are studying electronics at HS you will have access to there equipment witch will save you $$$.Regards

author: siliconmix
author_rank: Frequent Contributor
timestamp: February 25, 2012, 10:32:58 pm
content: welcome Roadran422.you'll enjoy it on this forum.it's a really friendly place to hang out.

author: FenderBender
author_rank: Super Contributor
timestamp: February 26, 2012, 11:10:18 pm
content: Hey there. I'm in high school too. I started with electronics when I was a freshman also. This forum and Dave's videos are great for learning.I know like 100000x more about electronics than I did 3 years ago. So good luck.

author: Mint.
author_rank: Frequent Contributor
timestamp: February 27, 2012, 03:14:58 am
content: He mate welcome to the forum. It's a great place and awesome community. I'm a beginner in electronics too. I haven't found anything that is really useful, but I take information from here and there and I am slowly learning about electronics that way.

author: EEVblog
author_rank: Unknown
timestamp: February 27, 2012, 05:51:34 am
content: Welcome.We all started with just a soldering iron and multimeter!Have fun.Dave.

author: Neilm
author_rank: Super Contributor
timestamp: February 27, 2012, 08:07:51 pm
content: Quote from: EEVblog on February 27, 2012, 05:51:34 amI started with an AA battery, a small transformer, my little brother ad a piece of paper marked "How to give someone an electric shock".Neil
Hoboken NJ Hacker Space Meeting Wed Feb 29th. - Page 1
Forum section: electronics / general

author: yanir
author_rank: Regular Contributor
timestamp: February 27, 2012, 04:45:47 pm
content: Hi all, if there is anyone in the NJ or NYC area that is looking for a hacker/maker space and the ones available aren't very convenient there is a meetup to discuss creating a new hacker space in Hoboken (or the surrounding area). Bring a project to work on if you want as well.The meetup is at a shared office space called Mission 50 and if you want to attend the meetup join up here:http://www.meetup.com/Hoboken-Hackerspace/See you there!
Simultaneous ADC sampling - Page 1
Forum section: electronics / general

author: MarkEdwards
author_rank: Newbie
timestamp: February 25, 2012, 09:54:36 am
content: I looking to sample 3 channels @5v max but I need to sample all the channels simultaneous at about 100 samples a second and 12 (14 would be better) bits.Can anybody recommend a device or family?Thanks.

author: MarkEdwards
author_rank: Newbie
timestamp: February 25, 2012, 10:14:34 am
content: That Should have read 10K sample second

author: Hypernova
author_rank: Unknown
timestamp: February 25, 2012, 11:47:46 am
content: If you got lot's of IO's consider parallel interface ADC's, you hook their data lines to separate ports but they all share the same control pins so they all trigger at the same time. You can reduce data line pin count to the MCU by using some multiplexors.Alternatively look into MCU's with DMA's or advanced triggering systems like the Atmel XMEGA which have multiple SPI ports that can be triggered to start transferring on a single signal to work on 3 SPI ADCs at the same time.The easiest and and messiest way is to use 3 MCUs controlling one ADC each, on an edge interrupt to all three MCUs they all start working the ADCs. You can use pretty much any ADC/MCU combo under the sun if you go this route.Are you sure you need such a high resolution? If you can settle with lower resolution there are many MCU's that can sample multiple channels at the same time. dsPICs for example can sample 4 channels at the same time and then convert them in series at 10bit.

author: NiHaoMike
author_rank: Super Contributor
timestamp: February 25, 2012, 03:23:11 pm
content: It should be very easy to find some cheap ADCs that can do 48kHz or more sampling at 16 bits or more. (They're used in audio.)

author: Hypernova
author_rank: Unknown
timestamp: February 25, 2012, 04:54:31 pm
content: Almost forgot this baby from ADI:http://www.analog.com/static/imported-files/data_sheets/AD7685.pdfIf you don't want to change MCU this is probably your best bet.

author: MarkEdwards
author_rank: Newbie
timestamp: February 26, 2012, 02:47:59 pm
content: Cheers.@Hypernova I did look at the dsPICs and I think that there are one or two PIC24's as well but 12bits is a minimum.I was looking more towards something like a cut down MAX11040.

author: Hypernova
author_rank: Unknown
timestamp: February 26, 2012, 04:43:25 pm
content: Probably got with the AD7685 types then, easy to control plus you can chain as many as you may need in the future.If you really need a single chip solution they are all more or less the same take the ADC7606 Simultaneous-Sampling ADC series from ADI for example, at least that one is faster:http://www.analog.com/static/imported-files/data_sheets/AD7606_7606-6_7606-4.pdf
Components samples Australia - Page 1
Forum section: electronics / general

author: Tioleco
author_rank: Contributor
timestamp: February 23, 2012, 11:52:26 pm
content: What are the fees charged to request samples of electronic components in Australia?

author: PeterG
author_rank: Frequent Contributor
timestamp: February 24, 2012, 01:00:02 am
content: That would depend on the vendor.Regards

author: johnboxall
author_rank: Unknown
timestamp: February 26, 2012, 04:42:54 am
content: Linear don't charge anything.

author: PeterG
author_rank: Frequent Contributor
timestamp: February 26, 2012, 05:01:17 am
content: I know microchip don't either.Regards

author: metalphreak
author_rank: Frequent Contributor
timestamp: February 26, 2012, 10:46:29 am
content: I believe TI charge a small fee for shipping? Around $8 or something small.
You have to check out this bargain on Amazon - Page 1
Forum section: electronics / general

author: Jope
author_rank: Regular Contributor
timestamp: February 23, 2012, 04:26:04 pm
content: American Microsemiconductor Inc. has some cheap IC for sale, but don't forget: "Only 1 left in stock--order soon".http://www.amazon.com/gp/product/B005DBD5D0/

author: G7PSK
author_rank: Super Contributor
timestamp: February 23, 2012, 04:28:11 pm
content: Damm it, I wanted ten and they only have the one.

author: sacherjj
author_rank: Frequent Contributor
timestamp: February 23, 2012, 06:12:00 pm
content: I'm slightly confused on the footprint.

author: david77
author_rank: Frequent Contributor
timestamp: February 23, 2012, 06:22:16 pm
content: What exactly does it do? Anybody got a datasheet handy?

author: aluck
author_rank: Regular Contributor
timestamp: February 23, 2012, 11:26:43 pm
content: Quote from: david77 on February 23, 2012, 06:22:16 pmturns s#@t into pure gold, obviously. =) but do not try to borrow mine - it's booked for centuries.it used to be cheaper though...http://www.xmarket.us/xm13-16310161-B005DBD5D0-120293_0001REVK.html

author: diracshore
author_rank: Regular Contributor
timestamp: February 24, 2012, 07:50:04 pm
content: If your wondering how that happened,http://www.ted.com/talks/kevin_slavin_how_algorithms_shape_our_world.html

author: G7PSK
author_rank: Super Contributor
timestamp: February 25, 2012, 04:51:18 pm
content: One thing is certain they don,t insure it during transit as shipping is an extra $10.00 at that asking price I would expect free shipping.

author: Bored@Work
author_rank: Super Contributor
timestamp: February 25, 2012, 06:22:21 pm
content: Quote from: G7PSK on February 25, 2012, 04:51:18 pmI would expect armed guards delivering it.

author: Zad
author_rank: Super Contributor
timestamp: February 25, 2012, 07:37:30 pm
content: For anyone undertaking the MIT 6.002x course mentioned earlier, you may be interested in the recommended book:http://www.amazon.co.uk/gp/product/1558607358Foundations of Analog and Digital Electronic Circuits (The Morgan Kaufmann Series in Computer Architecture and Design) Anant Agarwal (Author), Jeffrey Lang (Author)Be the first to review this item Like (0)RRP: £62.99Price: £55.43 & this item Delivered FREE in the UK with Super Saver Delivery. See details and conditionsYou Save: £7.56 (12%)Usually dispatched within 6 to 10 days.Dispatched from and sold by Amazon.co.uk. Gift-wrap available.7 new from £55.436 used from £73.60Interestingly, 3 of those 6 sellers are the same shop, at 3 different prices. With one seller charging a modest £184:87p
Whats Jerri up to now?? - Page 1
Forum section: electronics / general

author: FreeThinker
author_rank: Frequent Contributor
timestamp: February 24, 2012, 04:16:40 pm
content: Jerri has been very quiet lately, could this be why?

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: February 24, 2012, 04:30:46 pm
content: Is that a flying pinball machine...?Think she's been busy working at Intersil

author: FreeThinker
author_rank: Frequent Contributor
timestamp: February 24, 2012, 05:05:50 pm
content: Nah! Thats just a cover story, Shes been abducted by aliens... but they couldn't cope with her and are bringing her back!.

author: Stephen Hill
author_rank: Regular Contributor
timestamp: February 24, 2012, 05:48:28 pm
content: Jeri Ellsworth? Last I heard she has started working at Valve as can be seen in her latest video:

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: February 24, 2012, 11:56:18 pm
content: Did her and Ben start a new workshop, or something?

author: george graves
author_rank: Super Contributor
timestamp: February 25, 2012, 12:14:19 am
content: I know she was talking to Leo Laporte about starting a hacker space in the basement of his new studio - I don't think it was going to work out. I think she's tied to where she lives.

author: EEVblog
author_rank: Unknown
timestamp: February 25, 2012, 01:11:25 am
content: Quote from: mikeselectricstuff on February 24, 2012, 04:30:46 pmYes, but not Intersil, she now has another day job.Dave.
Obayashi Corp. Announces Plans For Beanstalk By 2050 - Fee-Fi-Foe-Fum - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: February 24, 2012, 07:06:00 am
content: Greetings EEVBees:--Please see below link to an article in IEEE Spectrum about plans for a Space Elevator:http://spectrum.ieee.org/nanoclast/semiconductors/nanotechnology/japanese-construction-company-plans-to-build-a-space-elevator-from-carbon-nanotubes-by-2050--And to the IEEE Spectrum comprehensive rundown on Space Elevator technology from a few years ago:http://spectrum.ieee.org/aerospace/space-flight/a-hoist-to-the-heavens/0--Enjoy."He didn't know where he was going. But he knew where he was wasn't it."Lord Buckley 1906 1960Best RegardsClear Ether

author: SoftwareSamurai
author_rank: Regular Contributor
timestamp: February 24, 2012, 06:09:58 pm
content: Hmmm. 38 years from now? Well, perhaps CNT tech will be ready by then. But the tether is only one component of the who <echo> Space Elevator </echo> idea. Seems like everyone keeps eyeballing the tether and forgetting about all the other problems that need to be addressed before construction can begin. Personally I think the bigger issue will be the power source. (I'm not convinced ground-based radiant energy is going to work so well when scaled up to life-size, but that's just me.)

author: SgtRock
author_rank: Unknown
timestamp: February 24, 2012, 07:23:20 pm
content: Dear Samurai:--You make a good point. I think they are going to have to integrate PV into the tether ribbon."Three weeks in the lab will save you a day in the library every time"R. Stanley Williams 1951 -Best RegardsClear Ether
Jagadish Chandra Bose father of open source ? - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: February 23, 2012, 12:53:27 pm
content: "Bose and patentsThe inventor of "Wireless Telecommunications", Bose was not interested in patenting his invention. In his Friday Evening Discourse at the Royal Institution, London, he made public his construction of the coherer. Thus The Electric Engineer expressed "surprise that no secret was at anytime made as to its construction, so that it has been open to all the world to adopt it for practical and possibly moneymaking purposes." Bose declined an offer from a wireless apparatus manufacturer for signing a remunerative agreement. Bose also recorded his attitude towards patents in his inaugural lecture at the foundation of the Bose Institute on 30 November 1917."source wikiin electronics perhaps
Find Chip Bar - How To Use - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: February 22, 2012, 11:31:28 pm
content: Greetings EEVBees:--I just or ordered a few caps and resistors for various power supply and testing projects, from Digi-Key. I went through the EEVblog Find Chips Bar. It took a little effort. I had to get the exact part # from Digi-Key and then come back in through Dave's Find Chips gateway. That way I was able to make sure DJ would get credited with the activity. Even though it does not pay an additional commission, it reflects to the good of the EEVblog site. I recommend that everybody, that wants to help, do the same. And do not forget to use the Amazon window for your various and sundry, household purchases, and what not. By the way, Dave, I am not the one who ordered the book on the history of, oh well, never mind."Does not squirrel crack nuts on bough of oak tree."Lao Fu 1410 1620Best RegardsClear Ether
Wicked problems - Page 1
Forum section: electronics / general

author: slateraptor
author_rank: Frequent Contributor
timestamp: March 02, 2012, 07:33:27 pm
content: A little over 2 hours ago--while readingthis IEEE Spectrum article--was the first time I had ever heard of a class of problems known as wicked...catchy name but no surprises there.What did catch me off guard was a post onYCombinator Newslinking to afree online bookdevoted entirely to the subject.Strangeness. Was the topic brought up on Oprah recently??
Paypal Exchange Rate - Page 1
Forum section: electronics / general

author: heyjay
author_rank: Newbie
timestamp: February 21, 2012, 11:10:55 pm
content: Dave, I love you brother... unfortunately my small donation is costing me 7x the donated amount by using Paypal.I am exchanging from US dollars to Australian gold nuggets....but wowI rather double, triple or quadruple my contribution to you, rather than continue with Paypal and their exchange rate.Any suggestion.... Let me know.

author: Unknown
author_rank: Unknown
timestamp: February 21, 2012, 11:25:24 pm
content: I believe you have two options, letting Paypal do the conversion, or let them charge AUD to your credit card and let your bank do the conversion. The latter is cheaper in my experience, but won't work with Amex because they only accept charges in USD. You could donate AUD 1 using both methods and see which gives you the lowest exchange rate. A 7x increase in costs sounds crazy, it's usually just a few percent.
Structural batteries - the future of battery technology? - Page 1
Forum section: electronics / general

author: harnon
author_rank: Regular Contributor
timestamp: February 21, 2012, 08:25:38 pm
content: I'm a big fan ofthese guys, who are making all electric race cars with 800bhp+Apart from looking great and being totally insane, there are a lot of cool electric/electronic things happening on the car (inductive charging, energy recovery from suspension and aerodynamics, etc). Perhaps the most interesting from an electronics point of view is structural batteries - i.e. using the chassis (nickel impregnated carbon fibre) to store charge. These are potentially much lighter than current batteries, although there is a way to go before they can hold as much charge.What do you guys think of this type of technology - old hat, way of the future, or something else? Actually, now that I think about it, could the secret of Dave's power supply enclosure be that it is a structural battery?!?!?!?There are other topics talking about electric vehicles / cost / emissions etc so would be good to keep it on topic

author: PeteInTexas
author_rank: Frequent Contributor
timestamp: February 21, 2012, 10:07:44 pm
content: I've never heard of it but, from your description, sounds like a great idea to increase the power/weight ratio. In addition to structural parts like the chassis, maybe the vehicle's "skin" as well.
Can anyone help me with this Datasheet PDF? -Current readings- - Page 1
Forum section: electronics / general

author: ElectronicFanatic1
author_rank: Contributor
timestamp: February 21, 2012, 04:34:52 am
content: So I came across this data sheet for a LM1876 22W audio amp.. and I cant seem to find the 'Supply Current' ratings. It's probably just slipping by me... but can able one help and point it out please?Thanks!Mitchhttp://www.jameco.com/Jameco/Products/ProdDS/835761.pdf

author: allanw
author_rank: Frequent Contributor
timestamp: February 21, 2012, 04:42:04 am
content: Need the max supply current or something? You could figure it out from the power dissipation vs output power graphs, which have different curves for VS = +/- 15, 18, 20. Otherwise it's not explicitly stated.

author: Pentium100
author_rank: Frequent Contributor
timestamp: February 21, 2012, 04:50:11 am
content: In page 18 (page 19 on the pdf reader) there is an equation how to calculate the required power supply current and voltage.Iopeak = Sqrt(2Po/Rl), where Po is the output power and Rl is the load resistance.

author: ElectronicFanatic1
author_rank: Contributor
timestamp: February 21, 2012, 04:51:04 am
content: Thank you!