hybridfree/eevblog-posts huggingface dataset:
USA FAA ReWrite of Radio-Control (Model Airplane & MultiRotor) Regulations - Page 1
Forum section: electronics / general

author: bench_knob
author_rank: Regular Contributor
timestamp: June 29, 2014, 09:35:48 pm
content: Some might consider this off-topic, however, I designed and have built most of my RC UAV gear, including digital frequency-hopping SS transmitters and receivers; I employ the open-source digital servo-motor (DIY) electronics, et cetera. I also construct(ed) my helicopters (commercial kits) and multi-rotor robots (mainly from scratch). I like to make my own stuff.In any case, this subject matter will effect many the world over, as many countries embrace the US FAA regs as guide-lines for their own regulations. The following is cited from the excellent ReadyMade RC chat-room, another forum where I hang-out. I feel that this may be of interest to wider RC audience.See:http://www.readymaderc.com/store/index.php?main_page=page&id=16and specifically:http://www.readymaderc.com/FAA/RMRC_FAA.pdfFYI.bench_knob

author: Rasz
author_rank: Super Contributor
timestamp: June 29, 2014, 09:43:23 pm
content: In this particular case it was US lagging behind rest of the world. Commercial use of drones and hobby RC gear was always prohibited in Poland for example, same with Australia (without license) and so on.

author: Rick Law
author_rank: Super Contributor
timestamp: June 30, 2014, 04:27:45 am
content: Quote from: Rasz on June 29, 2014, 09:43:23 pmJust because everyone else ahead doesn't mean it is a good thing to to be ahead. I for one don't want to be the head of the line rushing towards a cliff.The OP was objecting to an overreaching and overbearing government. We (the USA) was well behind the curve with socialism like socialized medicine and government everything. So, we were and are the world's number one economy. I am glad we were behind the curve on overreaching government.But, we are not behind far enough. Our government is growing. Revised number came out last week for the first quarter (2014): 3% contraction (of GDP) first quarter.We need to get further back behind the curve on that one instead of trying catching up with big-government.

author: Bored@Work
author_rank: Super Contributor
timestamp: June 30, 2014, 05:34:51 am
content: Quote from: Rick Law on June 30, 2014, 04:27:45 am

author: zapta
author_rank: Super Contributor
timestamp: July 01, 2014, 03:28:43 pm
content: Quote from: Rick Law on June 30, 2014, 04:27:45 amDon't be an obstructionist. ;-)Anybody willing to give here a few sentences summary of the change?
Rigol supplier in NZ - Page 1
Forum section: electronics / general

author: beretmaster
author_rank: Newbie
timestamp: June 30, 2014, 08:16:38 am
content: Hi there!I am looking for a company that supplies Riogl equipment to New Zealand at an equivalent price to the rest of the world, I found this threadQuoteBut its old and I wondered if anyone out there had any new information?Much appreciated!

author: beretmaster
author_rank: Newbie
timestamp: June 30, 2014, 08:18:41 am
content: Ahhh!I just saw the buy, sell, wanted thread. Apologies folks, I am new to these parts. will post over there.
4am breakfast  - Page 1
Forum section: electronics / general

author: Flump
author_rank: Frequent Contributor
timestamp: July 01, 2014, 03:30:41 am
content: nom nom

author: T3sl4co1l
author_rank: Super Contributor
timestamp: July 01, 2014, 03:32:32 am
content: Rocks, part of a balanced breakfast.(Actually, those are... oddly shaped eggs?! Skinned potatoes?)Not sure what all I'm seeing, but I bet if I had a nose near it, I wouldn't object at all.Tim

author: Psi
author_rank: Super Contributor
timestamp: July 01, 2014, 03:35:08 am
content: Welcome to eev-twitter/instagram

author: Flump
author_rank: Frequent Contributor
timestamp: July 01, 2014, 03:56:10 am
content: Tim , yep boiled potatoesPsi, I was repairing the pro peak charger thats in the picand it turned into an all nighter, so had breakie beforei went to bed so i didn't have to get up till later

author: SeanB
author_rank: Super Contributor
timestamp: July 01, 2014, 04:53:02 am
content: Nice, I would have skipped the potatoes and substituted some lettuce instead.
victoreen geiger counters, differences between models? - Page 1
Forum section: electronics / general

author: XOIIO
author_rank: Super Contributor
timestamp: July 02, 2014, 06:24:19 pm
content: Hey all, got my GST in, so I'm going to get a victoreen CDV-700Now, I am wondering, one that I could get immediately is the model 6B, what are the differences between this and the 6A?Based on the test sticker the seller says out of cal, and I probably won't be able to get it calibrated around here, but will still be awesome to have, I've wanted one for the past 5 years or so.Now I just need sources of radiation (hopefully it doesn't go nuts when I turn it on lol, that would be bad)

author: Tinkerer
author_rank: Frequent Contributor
timestamp: July 02, 2014, 11:40:53 pm
content: I was just thinking about buying a gieger counter since they arnt all that expensive. Any ideas on what a best all round one is? I know many are better for specific types of radiation.

author: XOIIO
author_rank: Super Contributor
timestamp: July 03, 2014, 12:04:26 am
content: Quote from: Tinkerer on July 02, 2014, 11:40:53 pmI barely have any knowledge myself, but the CDV-700 is seemingly the quintessential Geiger counter, however there are smaller ones without the "wand" that are cheaper, and you can even get little egg ones from china for 20 bucks or so though I don't remember what they are called.Also, turns out we do have a radiation lab with a cal service here, which rocks, though it will be $103.87 plus taxes for it to be calibrated, so that is an extra amount that you will want to keep in mind if you want to get an older one. It will no doubt be different for your area.
32 pin DIP plug - Page 1
Forum section: electronics / general

author: grumpydoc
author_rank: Super Contributor
timestamp: June 30, 2014, 07:23:30 am
content: Anyone know where to buy a 32 pin DIP plug - something likehttp://uk.farnell.com/harting/09-17-040-9622/plug-idc-dil-40way/dp/1106724orhttp://uk.farnell.com/3m/3460-0000pr/plug-idc-dip-24way/dp/1263211Can't seem to find anyone listing a 32way header in the UK - for the above two ranges I think that's because they're not made in 32 way (certainly the Harting one doesn't have a 32 way variant) but as I have a broken one in some equipment they must exist. I could do with the price being a bit better than the two Farnell examples as well (yes, I do want everything)

author: 22swg
author_rank: Frequent Contributor
timestamp: June 30, 2014, 07:54:55 am
content: Some here but not 32 way ?http://www.esr.co.uk/electronics/products/frame_connectors_pcb.htm

author: fluxcapacitor
author_rank: Frequent Contributor
timestamp: June 30, 2014, 03:14:54 pm
content: what is the equipment with the broken one ,any parts numbers or model.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 30, 2014, 03:26:46 pm
content: A 40W one will be much easier to find, fit a 32W socket if necessary to space it up, or cut down after crimping

author: grumpydoc
author_rank: Super Contributor
timestamp: June 30, 2014, 03:33:18 pm
content: It's for the emulation lead of a Dataman S4 - to be honest I can buy a complete lead from Dataman but at £24 (£10 for the lead, £10 for P&P(!) and £4 VAT) it's a bit pricey.I can't see what the original was as it's got a large piece of plastic firmly glued to the top obscuring any manufacturer detail.

author: grumpydoc
author_rank: Super Contributor
timestamp: June 30, 2014, 03:34:58 pm
content: QuoteIndeed - I can find those fairly easily, haven't seen any that look as though they would cut down though.
Vintage TIL302 7-seg, watch maybe? - Page 1
Forum section: electronics / general

author: Stonent
author_rank: Super Contributor
timestamp: June 29, 2014, 03:16:46 pm
content: I recently picked up 3 of these for a dollar, not thinking much about it at the time until I decided maybe they might make a cool watch but would need a 4th digit.So I looked on ebay and saw them being offered at 10 to 15 dollars each! So I hope my original source still has some.I think the ones that I have may be dated 1976 but I'll have to dig them out. Nice gold plated leads and all.I had been wanting to make a cool looking watch for a while but the hardest part seems to be finding a case to put it in.I'm really not much of a watch person but I had been hoping I could find one or make one that I liked well enough to wear regularly. The main thing I dislike about watches is they have this annoying ability to make your wrist sweat underneath so maybe I could figure out a way to address that.I figured the easiest way to house them would be to use one of those clear plastic travel pill containers with the clear screw on top but they tend to be around 2CM tall, so I'm going to keep my eyes open for alternatives.I think the design could be fairly simple, a DS1307, an ATTiny with enough pins to drive the LEDs, and 2 normally open push buttons.I've got a bag of 32768KHz watch crystals so that would work for the 1307. I'd probably use the internal oscillator on the ATTiny.The normally open buttons could in series to VCC on the ATTiny so only the Dallas chip would be consuming any electricity when not active. I could check which button was pressed and either display the date or time.This part looks fairly straight forward.It looks like all the anodes could be connected together per chip and all the cathode pins could be tied together across all chips. That would leave me with 4 anode pins to be used as a chip select and 8 segment select pins (or 7 if I decide to omit the decimal point).Due to space, current limiting resistors will probably be omitted if I can get away with it. I'm thinking of a cycle time of two sweeps per second and then one second off if the button is held down. That way the flashing one second on, one second off in between the sweeps will help with prolonging the display in addition to the sweeping on and off.I am interested in what you guys would think the best sweeping method would be, sweeping across the digits, or sweeping each digit and moving to the next one?As usual this will probably become one of my cool idea projects that I spend a weekend working on and then never get back to it.
Why are magnetic stripe writers so expensive? (anyone know a good cheap one?) - Page 1
Forum section: electronics / general

author: XOIIO
author_rank: Super Contributor
timestamp: June 27, 2014, 06:55:21 pm
content: Hey all, I've always been interested in getting a magstripe reader/writer and a bunch of blank cards to mess around with, test durability, etc, and the readers are cheap enough, you can get usb ones for $20 or so, but the writers, holy hell those seem to be $150+, what gives? What makes them so expensive? VCR's didn't have a huge price increase if they could record to the tape as well as play it back.Anyone know of a good reasonably priced one? I was hoping to get one for around $50, don't know if I'd spend more on something just to muck about with.
Dave why did you kik me out off Supporters Lounge ? - Page 1
Forum section: electronics / general

author: Bloch
author_rank: Unknown
timestamp: June 27, 2014, 11:34:59 am
content: Dave then you have time can you open the door to Supporters Lounge ?There are drawn money from my account did you not receive them ?I did send you an email at the 9 june, not sure if it is in the the spam filter or you just had more interesting thing to do then that is also ok
Rigol DS1104B - Page 1
Forum section: electronics / general

author: hhanoem
author_rank: Newbie
timestamp: June 27, 2014, 11:18:24 am
content: Hi,I have problems with my DS1104B scope.Channel 1 doesn't trigger anymore. Channel 4 has a supperposition sqaure wave. When i change the V/div from channel 4 the frequentie of the square wave changes also.I connected on channel 3 and 4 the same sinus signal and used the math function CH3-Ch4. It shows the following picture.-Does someone have the schematics of the DS1104B?-New firmware? where can i download. I have searched on rigols site but didn't findthnx for now
Way off topic music Amy Macdonald - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: July 01, 2014, 04:32:23 am
content: I'm getting close to 50 and I know that has a big influence in the type and style of music I listen to but I wanted to share this.Sadly I have to admit I had not heard of her before but wow, (in my opinion).

author: kolonelkadat
author_rank: Regular Contributor
timestamp: July 01, 2014, 10:17:26 am
content: Im getting on in years myself, and I wont lie, I do kind of like her voice.Honestly though, the music itself is a bit lackluster. I mean if youre going to call yourself MacDonalds and sing a song about rock and roll, and youre going to have a full on orchestra doing nothing but backing up your crappy beginner style strumming on a grandpa guitar, Id much rather listen to "Rock 'n' Roll McDonalds". At least that song is honest about what it is.
How to recover wasted energy... not solar roadways - Page 1
Forum section: electronics / general

author: h1386343
author_rank: Regular Contributor
timestamp: June 27, 2014, 01:48:54 am
content: Funny article from XKCDhttp://what-if.xkcd.com/102/This image made me particularly chuckle and think about mister JonesEnjoy!
ATM Teardown - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: June 25, 2014, 01:24:59 am
content: Here are a some interesting videos on an ATM teardown I found on YouTube.Encrypted pin pad teardown.Videos posted by Aussie50. Is he a member of the forum? He has some pretty cool videos to check out.KT

author: XOIIO
author_rank: Super Contributor
timestamp: June 25, 2014, 01:43:41 am
content: Oh man definitely going to have to watch this.

author: Alexei.Polkhanov
author_rank: Frequent Contributor
timestamp: June 25, 2014, 03:45:31 am
content: At first I was excited - wow this guy has lots of interesting tear down videos! But then I realized that he just going over some old/used/scrapped equipment with "one size fits all" screwdriver and a hammerDoes not look educational or even entertaining at all, pretty sad to see some interesting equipment being hammered down into pieces without any analysis.

author: Rasz
author_rank: Super Contributor
timestamp: June 25, 2014, 04:57:28 am
content: Quote from: Alexei.Polkhanov on June 25, 2014, 03:45:31 amAussie50 is a machinist, not an EE. But he is learning fast. He went from WTF is that to fixing TVs, got himself proper soldering station and other tools, and even got some old oscilloscope recently.

author: dexters_lab
author_rank: Unknown
timestamp: June 25, 2014, 08:39:22 am
content: Aussie50 is a great channel and well worth subbing to, i have been subbed to it for a long time, i wouldn't be surprised if he lurks around these parts.

author: XOIIO
author_rank: Super Contributor
timestamp: June 27, 2014, 09:26:15 am
content: Oh man he got them for a few bucks each?Damnit I wish I lived in Australia, no cool sites like that here :/

author: EEVblog
author_rank: Unknown
timestamp: June 27, 2014, 09:33:47 am
content: I've wanted to do an ATM teardown for years, and seen a few go for peunuts. Problem has always been the things weight several hundred kg, and I'm just not equipped to physically handle and transport these things.

author: abaxas
author_rank: Regular Contributor
timestamp: June 27, 2014, 10:17:01 am
content: Quote from: EEVblog on June 27, 2014, 09:33:47 amI thought every aussie had a ute just for that purpose.
OZ cops confiscate guns from Pastafarian... - Page 1
Forum section: electronics / general

author: N2IXK
author_rank: Frequent Contributor
timestamp: June 26, 2014, 11:34:43 pm
content: Seems they didn't care for his choice of traditional religious headgear (colander) in his firearms ID photo.http://metro.co.uk/2014/06/21/police-confiscate-weapons-from-pastafarian-4770547/https://www.techdirt.com/articles/20140623/09061727658/australian-police-confiscate-pastafarian-mans-guns-because-he-posed-his-id-card-wearing-colander.shtml
Nest buys Dropcam for 555 milion USD. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: June 21, 2014, 11:41:20 am
content: Google buys Nest. Nest buys Dropcam for 555 milion USD.http://www.engadget.com/2014/06/20/nest-is-acquiring-dropcam-for-555-million/Alexander.

author: Stonent
author_rank: Super Contributor
timestamp: June 21, 2014, 01:41:51 pm
content: Now they will know what you are doing and at what temperature.

author: DJ
author_rank: Unknown
timestamp: June 21, 2014, 01:57:13 pm
content: Now g00gledarpansa can keep an eye on dave when he starts rantingthere's a market for someone who makes an ipcam that looks like a big eyeball...

author: Galenbo
author_rank: Super Contributor
timestamp: June 26, 2014, 11:49:07 pm
content: Quote from: Stonent on June 21, 2014, 01:41:51 pmLMAO :-)

author: EEVblog
author_rank: Unknown
timestamp: June 26, 2014, 11:57:49 pm
content: Quote from: DJ on June 21, 2014, 01:57:13 pmand calls it The Big BrotherModel number must be 1984
Pikes Peak ELectric cars/motobikes... - Page 1
Forum section: electronics / general

author: gildasd
author_rank: Frequent Contributor
timestamp: June 26, 2014, 01:50:07 pm
content: How do we get one for a tear down?(And what's with the stupid alarm sound? Can't they get a tie fighter soundtrack and a loud speaker?)

author: peter.mitchell
author_rank: Super Contributor
timestamp: June 26, 2014, 06:05:58 pm
content: PPIHC would have me shitting bricks, PPIHC in the rain would have a steady flow!
DE-5000 clone - battery reverse polarity accident ;( - Page 1
Forum section: electronics / general

author: opty
author_rank: Regular Contributor
timestamp: June 18, 2014, 09:36:48 pm
content: Had my dumb moment this evening ;(I accidentally put new battery in reverse polarity (yes, I was looking at +- signs on the battery!!! ehhh )Anyway, the device didn't want to turn on so I decided to investigate. Check the picture attached, diode D5 quickly became first suspect and ohmmeter showed it is short. I removed it (there is polarity printed on the board - cathode to plus) and replaced it with 1N4148 - although I think the original one could be a zener (does anyone know? also why zener for 9v battery?).And happy days, it did the job!!! :-)But still (check the traces on the board) D5 is placed parallel to battery input and IMO that is pretty weird solution; shottky in series would do better? Original D5 doesn't look like protection shunt diode able to dissipate a few watts..., eh just my 2 cents.Opty

author: kg4arn
author_rank: Unknown
timestamp: June 19, 2014, 12:07:10 pm
content: Thanks for the post. I have a DE-5000 (not a clone but purchased from Japan on eBay) and it looks the same. D5 is reverse biased across the 9V battery terminals. If it fails short it would protect the rest of the meter but if it failed open then it wouldn't. I may put a protection diode in series with the 9V battery line.

author: zapta
author_rank: Super Contributor
timestamp: June 25, 2014, 11:16:50 pm
content: Quote from: kg4arn on June 19, 2014, 12:07:10 pmHow do you tell it's an original? I am in the market for one and saw it on ebayhttp://r.ebay.com/S1Avxt. What ebay seller did you use?

author: opty
author_rank: Regular Contributor
timestamp: June 25, 2014, 11:37:16 pm
content: Quote from: zapta on June 25, 2014, 11:16:50 pmI bought my from ebay seller t-u_trade_jp; well, I somehow can't believe it is original for the price... so it probably isn't.but still works perfect for my hobby use...

author: kg4arn
author_rank: Unknown
timestamp: June 26, 2014, 09:24:39 am
content: Ithink(I am not professing to be an expert at authenticity) that mine is authentic from DER EE because:The markings on mine are "Made in Taiwan" and "DER EE"The packaging has what I presume to be Japanese writing on it (could be Chines, I couldn't tell you), so I concluded it was for the Japan market.The unit appears identical to the one Dave shows on his tear down.And others on the forum have purchased from this seller and seemed to think the unit s were from the OEM DER EE in Taiwan.The price was low enough to take the chance... so I did.I bought mine from japanesianahttp://www.ebay.com/itm/DER-EE-DE-5000-High-Accuracy-Handheld-LCR-Meter-with-TL-21-TL-22-New-Japan-/161104294237?pt=LH_DefaultDomain_0&hash=item258290715d
Operating System for Robots - Page 1
Forum section: electronics / general

author: CosPhi
author_rank: Regular Contributor
timestamp: June 18, 2014, 09:52:22 pm
content: I found something interesting. They make an os for all kind of robots.The os should calculate/generate the walk and gestures for you. If it really does it, I think the hardest part (in software) is done ...http://www.v-sido.com/en/index.htmlhttp://www.japantimes.co.jp/news/2014/06/18/business/softbank-unveils-android-like-os-robots/On the videos it seems to work. But they looks very "toylike" / "handmade"But I also have to say, robots are an interesting topic. But I just now our ABB's form our factory and have zero experience with all other kinds, special walking robots

author: SirNick
author_rank: Frequent Contributor
timestamp: June 18, 2014, 10:37:25 pm
content: ROS.... future?

author: magetoo
author_rank: Frequent Contributor
timestamp: June 24, 2014, 12:11:13 pm
content: From the article:QuoteSanrio has a robotics division?Sanrio?!(Sanrio are the ones who own the Hello Kitty character, in case you didn't know.)

author: CosPhi
author_rank: Regular Contributor
timestamp: June 25, 2014, 02:45:12 am
content: Quote from: magetoo on June 24, 2014, 12:11:13 pmhttp://www.sanrio.com/... I guess you are right ...And did you know Hello Kitty becomes forty this year ...http://www.sanrio.com/hellokittycon/So who knows, they may soon they release a "Hello Roboty"
FP6116 Asynchronous Step-Down Regulator - Page 1
Forum section: electronics / general

author: Jane
author_rank: Frequent Contributor
timestamp: June 23, 2014, 02:43:16 pm
content: I have a Linux embeded board that usesFP6116 Asynchronous Step-Down Regulatora datasheet is herehttp://www.micro-bridge.com/data/Feeling-tech/FP6116.pdfIn this design , that Asynchronous Step-Down Regulator should supply 1,2V for CPU on this board.It worked for some time but now it stopped.So, I measured voltage and that Asynchronous Step-Down Regulator still supply 1.2V, yet CPU does not start.But when I use a different source of 1.2V, the CPU starts.So, I am rather confused.I can measure the same voltages, and more or less the same spikes( using oscilloscope), yet different results.Can anyone suggest any solution to that problem?Thanks
Heart rate monitor in a single package - Page 1
Forum section: electronics / general

author: TommyGunn
author_rank: Contributor
timestamp: June 20, 2014, 09:29:20 pm
content: So I was looking at this teardownhttps://www.ifixit.com/Teardown/Samsung+Gear+2+Teardown/23990Turns out I have one of the chips they could not identify.Anyone got a datasheet on this guy? I'm interested now.

author: DJ
author_rank: Unknown
timestamp: June 21, 2014, 01:42:28 am
content: Link did not work for me.Maybe something using this topology as the front end?http://www.analog.com/en/specialty-amplifiers/instrumentation-amplifiers/ad8232/products/product.html

author: Andlier
author_rank: Contributor
timestamp: June 21, 2014, 12:08:33 pm
content: Quote from: DJ on June 21, 2014, 01:42:28 amExcept that the sensor is based on optical principles, not ECG. Maybe one of the Si114x IR/visible sensors coupled with some clever software could do the job...http://www.silabs.com/products/sensors/infraredsensors/Pages/default.aspx

author: DJ
author_rank: Unknown
timestamp: June 21, 2014, 12:27:26 pm
content: Sorry, did not click through the links.If optical, likely similar to the pulse measurement of the galaxy s5. This appears to use the pulse section of a standard pulse oximeter, but is reflective rather than transmissive (less accurate generally, and losing the oximetry capability)

author: babysitter
author_rank: Frequent Contributor
timestamp: June 21, 2014, 01:51:51 pm
content: Reflexive doesn't necessarily mean losing the oxygenation information, but often the devices don't care for it - might be harder than with transmissive.You get a photoplethysmography signal in any (healthy) case when you shine any reddish light on skin and pick up what comes back or goes thru.The bobbling up and down of your photodiode current due to blood pressure in the watched tissue, with a low-frequency change overlaid given by breathing, and if you are unlucky lots of movement artifacts if your person under test is moving... or is a hyper-neurotic cat O0 That is your raw pulse signal, just compare to a treshold,Using at least 2 or depending on manufacturer up to 7 wavelengths, using the "color change" of hemoglobin depending on its oxygen saturation, is what gives you the SpO2 reading. (EMS Oxymetersm also the % of Hemoglobin spoiled by toxic gases)

author: miguelvp
author_rank: Super Contributor
timestamp: June 21, 2014, 10:25:16 pm
content: The link had an extra dot. This one will work:https://www.ifixit.com/Teardown/Samsung+Gear+2+Teardown/23990
Idea for a EEV Blog MP3 Player - Page 1
Forum section: electronics / general

author: gildasd
author_rank: Frequent Contributor
timestamp: June 20, 2014, 08:54:12 pm
content: I actually quite like this. Might do this as a project once I master the basics.Source:https://www.behance.net/gallery/545221/ALT1977-WE-ARE-NOT-TIME-TRAVELERS

author: FrankenPC
author_rank: Unknown
timestamp: June 20, 2014, 09:27:35 pm
content: That's incredible. I love the retro LED interface. Done right, this could be a winning retro-design.

author: gildasd
author_rank: Frequent Contributor
timestamp: June 20, 2014, 10:02:19 pm
content: There enclosures on the market that could do this with a bit of milling.And the rest would be printing.The only "difficult" part is the metal button... But I could make a 7005 polished knob on the lathe and fit it on a existing one.Then would come the "easy" electronics...

author: calexanian
author_rank: Super Contributor
timestamp: June 21, 2014, 05:50:55 am
content: I like the Abba Dancing Queen on there. Would have preferred Take a chance on me if it had to be Abba.

author: gildasd
author_rank: Frequent Contributor
timestamp: June 21, 2014, 06:10:37 am
content: How hard is it to extract datA fro the MP3 to display it on those led screens?

author: TheBorg
author_rank: Frequent Contributor
timestamp: June 21, 2014, 06:34:21 am
content: Quote from: gildasd on June 21, 2014, 06:10:37 amShouldn't be too difficult, I've seen it done a few times in peoples instructables projects.That being said, I should have access to a machine shop in the fall... This could be quite a fun project!

author: gildasd
author_rank: Frequent Contributor
timestamp: June 21, 2014, 08:23:03 am
content: Do the smallest possible board that can hold the leds, switch gear and connectivity. fill the rest with a giant LI-ion battery.You could even fit the 240/110 transformer INSIDE and run it from the mainsFir the front panel I think you could rear face print it.As for the fake wood where the logo is, If I pester my printing shop long enough, they will find a way... (maybe direct print with no substrate?)This is what I mean (simplified to 1 LED):I think you can get standard bits with the shape of a LED.

author: Stonent
author_rank: Super Contributor
timestamp: June 21, 2014, 01:45:22 pm
content: Well there's already an mp3 player program for the TI Tiva C (Stellaris) launchpad and a audio spectrum analyzer as well. So it would seem that most of the code from those projects could be recycled if you use a TI Arm MCU.

author: gildasd
author_rank: Frequent Contributor
timestamp: June 21, 2014, 02:45:03 pm
content: But does it ok quality?It would be silly to make this and not have at least Iphone level of sound.Not class A but a nice simple efficient design.
will an ESR meter help with this? - Page 1
Forum section: electronics / general

author: poida_pie
author_rank: Regular Contributor
timestamp: June 19, 2014, 11:30:12 pm
content: dunno, need advice.

author: jimjam
author_rank: Regular Contributor
timestamp: June 20, 2014, 04:37:47 am
content: Does it have 9 lives?

author: Legit-Design
author_rank: Frequent Contributor
timestamp: June 20, 2014, 01:12:50 pm
content: I just got awesome idea. How about crowdfunded project that FIXES leaked and ruined capacitors? Problem is mainly water based electrolyte that can't stand heat and dries up. We just add the water back into those electrolytic capacitors. After adding water we just just reseal the vent hole. Since adding water back to capacitor is trivial. We would need the crowdfunding money for the vent hole resealer apparatus.This could save the environment and save planet earth. No need to buy new telly, just get our amazing product that fixes it.

author: rexxar
author_rank: Frequent Contributor
timestamp: June 20, 2014, 10:42:52 pm
content: Quote from: Legit-Design on June 20, 2014, 01:12:50 pmThat doesn't help when the actual dielectric is damaged, or spewed all over the inside of your device.

author: tom66
author_rank: Super Contributor
timestamp: June 20, 2014, 10:48:51 pm
content: I think he was joking...I hope. I hope he was, at least.

author: Legit-Design
author_rank: Frequent Contributor
timestamp: June 21, 2014, 12:31:45 am
content: People have paid for more expensive jokes before, they can always fit some costly jokes here and there.Expensive joke we can all laugh at. "HA HA HA..."Maybe this invention can also brew some amazing coffee since it already includes some water in it by design? Hmm maybe it can also wash the dishes...

author: Stonent
author_rank: Super Contributor
timestamp: June 21, 2014, 10:41:45 am
content: "Does the leaking liquid smell like cat pee?"
help - Page 1
Forum section: electronics / general

author: kjn4685
author_rank: Regular Contributor
timestamp: June 20, 2014, 02:09:12 am
content: Hp monitor repair

author: daqq
author_rank: Super Contributor
timestamp: June 20, 2014, 06:19:19 am
content: Perhaps some, or any information might help?

author: vk6zgo
author_rank: Super Contributor
timestamp: June 20, 2014, 06:24:24 am
content: HP Monitor?For a computer,or part of a piece of Test Equipment?CRT?,LCD?
Assembly Joke T-Shirt - Page 1
Forum section: electronics / general

author: xuio
author_rank: Contributor
timestamp: June 19, 2014, 08:44:19 pm
content: Hi everybody,I made a teespring campaign for a T-Shirt I created, a knock knock-joke knockoff (pun intended):http://teespring.com/nopnopIf you like it, feel free to get one.Moritz
EEVBLOG IS BAD - Page 1
Forum section: electronics / general

author: jimjam
author_rank: Regular Contributor
timestamp: June 19, 2014, 04:52:21 pm
content: It is very addictive. I keep checking it so many times per day just for the sake of checking it.

author: f1rmb
author_rank: Regular Contributor
timestamp: June 19, 2014, 07:18:03 pm
content: Hi,I have the same problem, but I think that a good sign of the forum and posters quality, IMHO.Cheers.
Introduction and Solder paste question. - Page 1
Forum section: electronics / general

author: DionneSwart
author_rank: Contributor
timestamp: June 19, 2014, 01:15:01 pm
content: Hey everyone. Names Dionne. Have been in the electronics / digital systems game for around 20 years professionally. Worked for a few of South Africa's big comms companies as well as some smaller ones as a technician. Also worked in engineering and development. Currently run my own company in KZN.Now onto my question. Where the heck in Durban can one find a good solder paste without having to spend as much as a Fluke multimeter on it?Looking to do some small scale reflow soldering.CheersDionne

author: zapta
author_rank: Super Contributor
timestamp: June 19, 2014, 03:18:18 pm
content: Since you did not get a more specific answer, have you tried ebay?

author: SeanB
author_rank: Super Contributor
timestamp: June 19, 2014, 06:03:37 pm
content: Sorry, the only solder paste I have is a small pot with acid flux and 60% silver, used to solder stainless steel mesh together. Was given by the neighbour, who used to work a few years ago at Mondi as a fabricator. He used this to join the paper beds in the paper maker.

author: SirNick
author_rank: Frequent Contributor
timestamp: June 19, 2014, 06:30:32 pm
content: I didn't have much luck finding any locally. It's a niche product (not too many people buying it everyday, at least in single quantities) and has a short shelf life. Not a good combo for convenient availability.If you have a local hackerspace, ask them if they have any. Or if they would be willing to consider a group buy. Otherwise, you'll need to go online. Even that can be challenging, since legit distributors will want to send it via air mail, which could be considerably more expensive than the product itself.
Weird old packaging type.  Can you identify this? - Page 1
Forum section: electronics / general

author: JoeN
author_rank: Frequent Contributor
timestamp: June 18, 2014, 11:37:54 pm
content: It looks like tape and has a peel off top, but it doesn't bend and has no holes, so it can't be put on a spool or automatically indexed. You could call it a one-wide tray with a peel off top, but that is a very liberal definition of tray the way it is meant these days. It isn't a tube at all. What is this packaging type called?

author: retrolefty
author_rank: Super Contributor
timestamp: June 18, 2014, 11:57:33 pm
content: QuoteA threefer?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 19, 2014, 02:12:37 am
content: It doesn't look very rigid from here. But, hard to say from a normal perspective.Windowed bumper QFP, cool. Old schtuff alright!Ed: yup, CMOS EPROM style. MAX5k series... which seems odd to me as MAX7k is, I think, finally going obsolete, and MAX3k is still going (being the 3.3V version). Or something like that. Both latter types are EEPROM, not EPROM or Flash (well, unless the latter is, but, meh, I don't remember exactly).On a related note, looks like they call it a tray.http://www.altera.com/literature/an/an071.pdfTim

author: Richard Crowley
author_rank: Super Contributor
timestamp: June 19, 2014, 02:29:46 am
content: Yes, there are generic and custom-size trays for unpackaged dice, as well as trays for different sizes of packaged parts.I presume that there is probably some maximum size for SMD parts to be able to put them on reels for auto pick-n-place.

author: miguelvp
author_rank: Super Contributor
timestamp: June 19, 2014, 02:37:03 am
content: Datasheet:http://www.altera.com/literature/ds/m5000.pdfOnly reveals:28 to 100 pins available in dual in-line package (DIP), J-lead chip carrier, pin-grid array (PGA), and quad flat pack (QFP packages)andMAX 5000 devices in 100-pin QFP packages are shipped in special plastic carriers to protect the QFP leads. Each carrier can be used with a prototype development socket and programming hardware available from Altera or third-party programming ma....For detailed information and carrier dimensions, refer to the QFP Carrier & Development Socket Data Sheet and Application Note 71 (Guidelines for Handling J-Lead & QFP Devices)Edit found app note:ftp://ftp.altera.com/pub/lit_req/document/an/an071.pdfSo it indicates it's a tube part number E20-02080-00Edit: nope wrong not tube, tray E20-03544-01? back to start for me

author: free_electron
author_rank: Super Contributor
timestamp: June 19, 2014, 06:59:21 am
content: This is packaging to hand out a few samples and ship them withou bending pins. They did that on early clcc qfp style packages.
Alternative to a video bloggers camera tripod - Page 1
Forum section: electronics / general

author: IanJ
author_rank: Unknown
timestamp: June 19, 2014, 07:55:23 pm
content: Hi all,Just thought I'd share my latest creation.............Take one microphone stand:- Make the base heavier by adding some stone- Remove the 3 rubber feet and fit sharp spikes instead.- Make an adaptor plate to mount the pan/tilt to.- Add a little bracing to the base (not strictly necessary, I just thought I'd try it).Upside: No more tripod feet getting in the way. Much easier to pull/push to the side when required.Downside: Not as stable as a tripod, it takes a second or so to stop oscillating when you move it......but I am on a carpet.Ian.
MOVED: rigol 1052e 100Mhz on ebay  - Page 1
Forum section: electronics / general

author: GeoffS
author_rank: Unknown
timestamp: June 19, 2014, 06:56:58 am
content: This topic has been moved toBuy/Sell/Wanted.https://www.eevblog.com/forum/index.php?topic=32729.0
security cam on pc  - Page 1
Forum section: electronics / general

author: Flump
author_rank: Frequent Contributor
timestamp: June 25, 2014, 09:09:48 am
content: I have a security camera outside and at the moment its on a separate tv/monitorand want to feed the camera into my pc instead and use a desktop short cut,to quick and easily view the camera (camera and pc on 24/7)The camera just has a standard rca/phono output (ground and signal no sound) but I canchop the plug off and make any kind of connection needed.I dont want to use a TV card as they are overly complicated for what i wantjust want a simple way of doing this.Any suggestion on a cheap and simple way of doing this ?

author: rollatorwieltje
author_rank: Unknown
timestamp: June 25, 2014, 10:27:17 am
content: Look for "Easycap" USB dongles. They shouldn't cost more than about 10 USD. If you're on a Mac you should look for the DC60+ type, as the DC60 without + for some reason doesn't work.

author: Neverther
author_rank: Regular Contributor
timestamp: June 26, 2014, 05:42:23 am
content: The above works, just install vlc and make shortcut to launch it with easycap as input.If you want 24/7 recording and/or motion detection, throw linux on an old laptop and install zoneminder.Easycap works out of box with linux so you still need to get that to connect the camera.

author: Psi
author_rank: Super Contributor
timestamp: June 26, 2014, 07:02:21 am
content: The eazycap clones don't have as good image quality as the legit one.However its probably fine for this application.

author: AmmoJammo
author_rank: Frequent Contributor
timestamp: June 26, 2014, 07:54:57 am
content: I could never get my fake easycap to do anything!

author: Psi
author_rank: Super Contributor
timestamp: June 26, 2014, 10:14:32 am
content: you probably got a DOA unit

author: Galenbo
author_rank: Super Contributor
timestamp: June 26, 2014, 10:16:45 am
content: Quote from: Flump on June 25, 2014, 09:09:48 amYou could use a video-to-lan/wlan converter if the distance is long or cables are difficult to wire. It puts access to the stream/images on your network, and you can easyly view them with any browser.What's the price/quality/specs of your existing camera? For a very low price you have an (wireless) IP cam now that performs better than any existing 1990's cam.

author: Psi
author_rank: Super Contributor
timestamp: June 26, 2014, 10:18:47 am
content: heh, yeah, a wireless LAN IP camera from a place like aliexpress might be a cheaper option

author: Galenbo
author_rank: Super Contributor
timestamp: June 26, 2014, 10:20:19 am
content: Quote from: Flump on June 25, 2014, 09:09:48 amA really cheapass solution is to put an old smartphone in front of that monitor, and make it share its images on the network.The app "IP webcam" (Android) does this.Then you browse to (example) 192.168.1.144:8003 and you see the video (of your video).

author: AmmoJammo
author_rank: Frequent Contributor
timestamp: June 26, 2014, 11:10:06 am
content: Quote from: Psi on June 26, 2014, 10:14:32 amI plugged it in, and it works now!I can't even remember what it did or didn't do last time I tried it... years ago...
50/60Hz energy harvesting - Page 1
Forum section: electronics / general

author: Afrotechmods
author_rank: Unknown
timestamp: June 18, 2014, 08:27:51 pm
content: HelloI am playing around with trying to harvest tiny amounts of power from the 60Hz mains all around us. I pulled it off many years ago using a long piece of wire, a schottky diode and a low leakage cap in a configuration similar to the classic crystal radio receiver. After about 10 minutes of charging I was able to flash an LED for a fraction of a second. I'm having difficulty pulling it off again and I am not sure why. Could be because I am no longer sitting next to ridiculous amounts of 3 phase power?Has anyone pulled this off before and got any experience they can share?

author: Richard Crowley
author_rank: Super Contributor
timestamp: June 18, 2014, 08:45:20 pm
content: I had heard that someone was promoting a gadget that would respond to radio waves (i.e. a "key finder") that was powered from power "harvested" from the ambience.If it gives you any clue, I believe you will find the discussion over in the "List of Dodgy Crowd Source Funded Projects"If you DID manage to make this work, it would only be able to harvest energy in places where artificial, man-made energy occurs. i.e. not out in the wilderness unless directly underneath a high-voltage power mains route. And it would "harvest" so little power that seems like it would severely limit how useful it is.
Analog Devices buys Hittite  - Page 1
Forum section: electronics / general

author: Zad
author_rank: Super Contributor
timestamp: June 09, 2014, 07:03:25 pm
content: I have just seen on my Twitter feed that Analog Devices have bought Hittite Microwavehttp://www.analog.com/en/press-release/6_9_14_ADI_To_Acquire_Hittite_Microwave_Corporatio/press.htmlThinking about it, it is a pretty good purchase with regards to product symbiosis. Hittite take over in RF where AD stop. I'm surprised though, I didn't think Analog were the buy-out type, and I thought they were a bit low on money. Also surprised that Hittite hadn't been bought out earlier by TI or similar.

author: Marco
author_rank: Super Contributor
timestamp: June 09, 2014, 07:08:19 pm
content: Low on cash doesn't matter, money is cheap in bubble country ... so everyone is doing leveraged buyouts, stock buybacks etc etc etc. I'm sure AD management will have a nice increase in income, they are running a larger company now after all.The come down is going to be a bitch.

author: DJ
author_rank: Unknown
timestamp: June 09, 2014, 07:09:03 pm
content: AD bought PMI (think OP-07 et al) many years backHittite does seem like a good fit.

author: marshallh
author_rank: Unknown
timestamp: June 10, 2014, 01:25:19 am
content: AD seems one of the sane few companies left. They will do a good job taking care of HMC.

author: JoeN
author_rank: Frequent Contributor
timestamp: June 19, 2014, 06:58:54 am
content: Woot. Far easier to sample from AD than from Hittite.
Impressive space tech photos - Page 1
Forum section: electronics / general

author: daqq
author_rank: Super Contributor
timestamp: June 16, 2014, 10:39:52 am
content: I've been searching for some space tech photos, when I came upon this:http://www.klabs.org/images/swas_memory/swas_memory.htmI can't even imagine the cost per unit. Anyway, there are some more photos there:http://www.klabs.org/images/images.htmHow long does one have to have experience in that area to do this kind of stuff? Where does one study this? I'm guessing this is not exactly part of the average curriculum on your local uni. Does the employer give a year of training or some such?

author: wkb
author_rank: Super Contributor
timestamp: June 17, 2014, 01:39:47 pm
content: beautiful engineering.I have something similar but non-space: a Multi Chip Module that was once upon a time part of a VAX9000.Really beautiful engineering, need to take some pictures of it.

author: dexters_lab
author_rank: Unknown
timestamp: June 17, 2014, 03:20:20 pm
content: ooh, yea that looks nice, i shudder to think how much it cost. Would love to see anything like that with my own eyes!made me think of the silicon detectors used in ATLAS, while not space tech, it's in the same vein. As in it's highly specialised and bespoke.https://www.stfc.ac.uk/PPD/resources/pdf/lecture02_weber.pdfhttp://web.physik.rwth-aachen.de/~feld/talks/sct_seminar_19_12_00.pdfVideo which includes some detail on the silicon detectorshttp://www.atlas.ch/multimedia/pixel-silicon-tracker.html#episode-2...and a shameless plug to my video there:

author: marshallh
author_rank: Unknown
timestamp: June 17, 2014, 04:30:01 pm
content: Quote from: wkb on June 17, 2014, 01:39:47 pmYes, you do

author: daqq
author_rank: Super Contributor
timestamp: June 18, 2014, 07:59:52 pm
content: QuoteI'd love to see that!As for CERN: I've seen some tech from there... wow... that about sums it up.
Need Help! ( ferrite core ) - Page 1
Forum section: electronics / general

author: mzdenkov
author_rank: Regular Contributor
timestamp: June 17, 2014, 07:42:44 pm
content: Hello!So as I said in subject name, I need help.Recently I've opened some old and not working AM/FM radios and i found someferrite cores/rods like this one on pic. :http://upload.wikimedia.org/wikipedia/commons/6/62/Ferrite_antenna.jpgSo can someone tell me or link me the datasheet of this? because im having someideas to use them in some projects, but the problem is that I dont know the characteristics of thatrods and that makes some problems while doing some calculations for the coils, etc.Thanks!

author: gibbled
author_rank: Regular Contributor
timestamp: June 17, 2014, 08:36:50 pm
content: This might get you started...http://www.amidoncorp.com/rods-and-tiles/

author: mzdenkov
author_rank: Regular Contributor
timestamp: June 17, 2014, 09:37:08 pm
content: Hmmm, thanks... i will give it a try. They only give frequnecy interval where the rods work, but not the magnetic properties of the rod (magnetic loss, B/H (Magnetic Hysteresis) properties).Now at least i have a clue where to look.Thanks!

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 17, 2014, 11:49:23 pm
content: Impossible to say exactly.Without taking measurements, it's very likely it's:MnZn ferritemu >= 500Fo > 1MHzBmax >= 0.3TFurther, it might be very similar to a Fair-Rite #77 (generic all-purpose, mu=2000), or #33 (lower mu, near zero tempco).It's unlikely to be very high mu (doesn't matter a damn for a rod; low cutoff frequency), or NiZn (lower Bmax which won't matter, but higher cost and lower mu will matter).If you want more, Amidon does indeed have #33 rods in various sizes.Tim

author: mzdenkov
author_rank: Regular Contributor
timestamp: June 18, 2014, 02:11:28 am
content: Quote from: T3sl4co1l on June 17, 2014, 11:49:23 pmCan you tell me for what "mu" stands for?

author: Rigby
author_rank: Super Contributor
timestamp: June 18, 2014, 02:13:30 am
content: In context, guessing, it looks like a magnetic permeability measurement.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 18, 2014, 03:03:14 am
content: Yes, relative permeability.Needless to say, you need formulas that use mu, to calculate anything. Example:Tim

author: mzdenkov
author_rank: Regular Contributor
timestamp: June 18, 2014, 04:08:20 pm
content: I know about forumulas, because i have used them on one or two college courses, but they are a little bitdiffirent.
Anyone versed in ArnoldC? - Page 1
Forum section: electronics / general

author: rsjsouza
author_rank: Super Contributor
timestamp: June 18, 2014, 02:48:21 pm
content: Still can't stop laughing...https://github.com/lhartikk/ArnoldC/wiki/ArnoldCSeveral parsed commands are here:https://github.com/lhartikk/ArnoldC/blob/master/src/main/scala/org/arnoldc/ArnoldParser.scala

author: zapta
author_rank: Super Contributor
timestamp: June 18, 2014, 03:11:37 pm
content: I wouldn't touch it for serious projects, it's not functional programming.Sent from my Nexus 5 using Tapatalk

author: nuhamind2
author_rank: Regular Contributor
timestamp: June 18, 2014, 04:17:52 pm
content: There are some bizarre programming language out the, this is one of themhttp://en.wikipedia.org/wiki/Shakespeare_(programming_language)