hybridfree/eevblog-posts huggingface dataset:
Having a go: 1984 small business video (incl Aust electronics industry)  - Page 1
Forum section: electronics / general

author: vk3yedotcom
author_rank: Frequent Contributor
timestamp: May 15, 2015, 09:54:49 am
content: Jump to 6:47. Interview with local supplier of Sydney port communications systems. Many shots of circuit boards and hand-soldering."No sense in Australia making cheap calculators you can get from Taiwan, but what we can supply is good quality brainpower"

author: VK3DRB
author_rank: Super Contributor
timestamp: May 15, 2015, 11:32:13 am
content: G'day!Great video. They had a few IBM PC-1's and some nice equipment. It appears though they did not care much for ESD damage to their boards.What happened to John Almgren...http://telsoc.org/champions/john_almgren_amhttp://www.totaltele.com/view.aspx?ID=429169He started with $300 and sold out for $70,000,000 to Lucent. Smart bloke.I believe he may be still alive.
Foxtel IQ infrared remote signal not compatible with ordinary IR extenders. - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 13, 2015, 07:19:13 am
content: Why?No, really, why?

author: wraper
author_rank: Unknown
timestamp: May 13, 2015, 07:52:36 am
content: Could be significantly different carrier frequency or wavelength.

author: Someone
author_rank: Super Contributor
timestamp: May 14, 2015, 12:49:57 am
content: Why?Management hears that people are putting one box centrally in the house and conveniently using wireless video connections and remote extenders, they would prefer to sell additional devices so require that the new design prevents this happening.The question could be better put as why would you have pay TV delivered through a proprietary device? Streaming services are now viable alternatives for much of the content.

author: Unknown
author_rank: Unknown
timestamp: May 14, 2015, 01:23:07 am
content: Umm, they are. UEC boxes use a version of Philips RC5, while afaik the Pace boxes (e.g. IQ/IQ2) use RC6. Both are clocked at the Philips standard of 36kHz, and use the typical ~940nM IR.I haven't played with an IQ3, though I've heard they work OK with an IQ2 remote - the IQ3 remote is, I believe, RF, though the box itself also has an IR receiver - so presumably they too use RC6/36kHz/940nM & the same device addressing scheme.
Interesting board I found. ANy idea what It is? - Page 1
Forum section: electronics / general

author: iampoor
author_rank: Frequent Contributor
timestamp: May 11, 2015, 07:09:53 pm
content: Wonder if there is any gold under those cans?

author: SeanB
author_rank: Super Contributor
timestamp: May 11, 2015, 07:55:24 pm
content: Doubt it, likely either some large lumps of quartz or some mechanical filters. Likely something to do with PMR equipment, it looks like a set of telephony grade audio filetrs at the left ( the 300 to 3400Hz says it is phone audio bandwidth) and then the 130kHz filters are there to separate off the data channels off the received FM audio,Might also be a multichannel SCA receiver for broadcast MUZAC in stores, that used to be sent on FM radio as a subcarrier and was decoded for background audio.

author: PA0PBZ
author_rank: Super Contributor
timestamp: May 11, 2015, 08:08:23 pm
content: I don't think it's just a receiver, it has transmit bandpass filters. The 600 Ohm seems to point to telephony equipment, as is the letters KPN which makes me think it was made for the Dutch national telephony provider. Probably going to find pot cores and caps in there.

author: iampoor
author_rank: Frequent Contributor
timestamp: May 12, 2015, 01:08:45 am
content: Quote from: SeanB on May 11, 2015, 07:55:24 pmInteresting, the surplus lot has a bajilllion of these! A few other cards that appear to go in a similar system too. These cards are probably ~3 pounds each. Very easy to tell no cost was spared! I wonder if there would transformers under the audio filters?Quote from: PA0PBZ on May 11, 2015, 08:08:23 pmInteresting!

author: SeanB
author_rank: Super Contributor
timestamp: May 12, 2015, 06:25:33 pm
content: Grab one or two more and pop them in the post to Dave, he can get his minion to mill them open for a look inside.

author: Vgkid
author_rank: Super Contributor
timestamp: May 12, 2015, 09:30:31 pm
content: http://m.legacy.com/obituaries/sfgate/obituary.aspx?n=edward-mitri-karkar&pid=168867334&referrer=0&preview=falseDefinetly telecom, theres the founders obituary.
OT Funny. Printer has gas. - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: May 12, 2015, 02:32:00 am
content: The audio is what's important here.I'm guessing this is not the normal operating sound for this model?

author: TerraHertz
author_rank: Super Contributor
timestamp: May 12, 2015, 05:56:58 am
content: Ha ha... It's probably the particular text word/line spacing that causes that noise.Perfect for showroom sales demonstrations!

author: redshift
author_rank: Contributor
timestamp: May 12, 2015, 06:12:22 am
content: Quote from: TerraHertz on May 12, 2015, 05:56:58 amI don't think so. It makes that sound even after it has printed the text and is just pushing the page into the tray. The question is whether it's this unit or all of them.Looking at your Homer avatar while listening to this video makes me giggle

author: electr_peter
author_rank: Unknown
timestamp: May 12, 2015, 10:16:08 am
content: If it is not fake (who knows what food video operator has eaten), it is possible internal gear are clogged with debris (plastic, paper or metal). Stick a flexible rod in the rims on the bicycle and listen - it sounds similar if carefully adjusted.

author: GreyWoolfe
author_rank: Unknown
timestamp: May 12, 2015, 12:19:28 pm
content: That printer and I sound remarkably alike. +1 on electr_peter. Not knowing the age of the printer, could also be worn/badly meshing gears. Check everything starting with the pickup roller. Don't turn it on, take it apart!

author: SeanB
author_rank: Super Contributor
timestamp: May 12, 2015, 03:59:05 pm
content: I have an old Canon BJC600 that does the same, worn paper transport gears and bushes. Not worth fixing, and as it only ever was printing black I just refilled the colour cartridges as they cleaned themselves empty with black ink, so now it is a 7 colour black printer.

author: PeterFW
author_rank: Frequent Contributor
timestamp: May 12, 2015, 06:55:43 pm
content: Quote from: Homer J Simpson on May 12, 2015, 02:32:00 amSounds like a belt slipping, a gear misalignment and/or debris in said parts or a different configuration of those failures.
Ideas on what to do with an old pick and place assistance machine - Page 1
Forum section: electronics / general

author: daqq
author_rank: Super Contributor
timestamp: May 12, 2015, 01:20:46 pm
content: Hi guys,At work we have an old pick and place assistance machine - basically it's an XY table with a pick and place nozzle that you operate by hand and it shows you the XY tip position. It's rather old and completely obsolete - as far as I know it hasn't been used for at least 7 years (how long I've been in the company) with no plans to use it again. At the moment it's just gathering dustThere are part holders and the assistance part (as I understand it) that it show you which part you should pick up, where you should place it and then repeat. It's got lovely precision mechanics. It does not have any motors however - it just has XY position sensors.It would certainly be a waste to throw it out. If nothing comes to mind it will be given away to someone local. So, do you have any suggestions as to how to use this thingy?Thanks,David

author: lapm
author_rank: Frequent Contributor
timestamp: May 12, 2015, 02:55:34 pm
content: Home made pick and place machine? It has some of required mechanics allready

author: daqq
author_rank: Super Contributor
timestamp: May 13, 2015, 08:31:49 am
content: QuoteI dunno, adding motion to an XY rail is not exactly trivial.

author: Mechanical Menace
author_rank: Super Contributor
timestamp: May 13, 2015, 10:01:03 am
content: It already has some way to get position data on the x and y axis, ad some on the z and you've got one of them manual 3D digitisers
Software for car electric diagrams in boobks. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: May 10, 2015, 09:25:45 am
content: I was reading a book for the electric systems in a car. It has some well made electric diagrams with realistic parts, not only electric symbols. This is very very good for teaching purposes.Does anyone know any CAD-like software that can be used to produce such drawings? Are those drawings hand made with a drawig software?Alexander.

author: HighVoltage
author_rank: Super Contributor
timestamp: May 10, 2015, 09:32:43 am
content: I am not aware of any such special application software.When I needed these kinds of drawings, I made them all myself in Corel Draw

author: Rerouter
author_rank: Super Contributor
timestamp: May 10, 2015, 09:47:39 am
content: These appear to be pre-drawn symbols, i've heard of people using software like visio to do them in the past, its not likely to be a true cad package, more a publishing package or similar. having to do scada screens in the past, I had to draw up the symbols in paint, then import them into the package to layout as i wished, drawing lines between the symbols to reflect the connections,
first post ?just try out - Page 1
Forum section: electronics / general

author: abigbell
author_rank: Contributor
timestamp: May 09, 2015, 03:32:50 am
content: hello there ?complete newbie here ?just try out to see how to post here

author: atferrari
author_rank: Frequent Contributor
timestamp: May 09, 2015, 04:33:29 pm
content: On the right of the "Post" button there is one that reads "Preview". Instead of asking others, you can see the result yourself.

author: abigbell
author_rank: Contributor
timestamp: May 10, 2015, 06:12:01 am
content: Quote from: atferrari on May 09, 2015, 04:33:29 pmthanks?figured it out
Electrical wires and carbon fiber camera tripod-why can I feel the electricity? - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: May 05, 2015, 04:04:12 am
content: I like to hike and usually bring my camera and sometimes my tripod when i do so, which is a Manfrotto knockoff which is made out of woven carbon fiber.Basically when I am around high tension wires, (electrical power lines) my tripod "feels different" Literally, when my hand makes any movement along the length of the carbon elements, I can feel something there, its like a vibration.Solid metal tripod.. no..has anybody else ever noticed this?Also, FYI, any old fluorescent tube stuck in the ground around there lights up by itself. An artist in the UK (forget his name) has done a whole series based on this ghostly effect.. (they flicker)

author: helius
author_rank: Super Contributor
timestamp: May 05, 2015, 04:34:37 am
content: Also seehttps://www.eevblog.com/forum/projects/strange-electrical-sensation-from-my-laptop/

author: Dago
author_rank: Frequent Contributor
timestamp: May 05, 2015, 09:12:22 am
content: Well your tripod is working as an antenna, like fluorescent lights do under a powerline.

author: electr_peter
author_rank: Unknown
timestamp: May 05, 2015, 09:26:04 am
content: Be aware that carbon fibre is an excellent conductor. CF is not the same as plastic insulator at all, it is a conductor.You can try using tripod with plastic or glass fibre legs instead.

author: Zero999
author_rank: Super Contributor
timestamp: May 05, 2015, 06:25:16 pm
content: How tall is the tripod?If it's shorter than a fluorescent tube and is placed on the ground, then there's no safety risk. The tiny current capacitively coupled to it is far too low to do hurt you.Obviously don't lift it up and wave it under the wires because a spark will leap towards it and you will die.

author: cdev
author_rank: Super Contributor
timestamp: May 09, 2015, 01:52:00 am
content: The tripod when unfolded is tall enough for me to look through my camera standing, so its pretty tall. but the thing is, it doesn't need to be extended (four sections per leg) to act this way, it does it when its fully folded.its distracting when I am trying to take a photo Nonetheless i have gotten some great photos around there in the past.Ive seen florescent lights put up in rows in that situation - they flicker! It was a long time ago, i don't remember if there was any discernible pattern.

author: NiHaoMike
author_rank: Super Contributor
timestamp: May 09, 2015, 05:26:29 am
content: Just wait until the "free energy" people find out...

author: cdev
author_rank: Super Contributor
timestamp: May 10, 2015, 03:08:58 am
content: You can actually extract tiny amounts of electricity from strong local RF. and then pipe that into a "joule thief" circuit..Its not "free" of course, but in most semi urban areas its "available".there are dev boards out there with real CPUs on them that can run off of very very low power like that.
HELP>  Banana Plug Adapter (F) for Threaded Binder Posts - Test Instruments - Page 1
Forum section: electronics / general

author: Steve Wayne
author_rank: Contributor
timestamp: May 06, 2015, 09:07:38 pm
content: Does anyone know where to get Banana Plug Adapters (Female) for Threaded Binder Posts, such as those pictured in this image? And/or what they are referred to as? .... Mahalo !

author: Fsck
author_rank: Super Contributor
timestamp: May 09, 2015, 06:43:13 pm
content: wouldn't you just use spade terminals and screw them down?apparently special spade terminals exist, something like:http://www.amazon.com/Eastone%C2%AE-ES537C-Mcintosh-Adapter-Quality/dp/B00AHQL97UI'd say DIY is probably your best option over overpriced "audio" solutions.

author: Stigaard
author_rank: Contributor
timestamp: May 09, 2015, 07:09:27 pm
content: I got some from Frankie (ILoveElectronics on the forum), which might fit, depending on the diameter of the thread, but try to contact him, he is very helpfull.
[Aus] buying from Element14 versus Newark UK - huge price difference. - Page 1
Forum section: electronics / general

author: DTJ
author_rank: Super Contributor
timestamp: May 06, 2015, 10:37:31 am
content: There's an item Farnell.... ooops.... Element14 sell here in Australia for $38. I see they sell the same item via Newark for $17.I recall something years ago where Farnell would get Newark gear in at no extra cost - is this still the case?Anyone here in Australia bought from Newark directly?Cheers.DTJ

author: mswhin63
author_rank: Frequent Contributor
timestamp: May 07, 2015, 10:01:05 am
content: I think we in Australia have to expect things to be very expensive from larger component suppliers. Freight and high labour costs in Australia are the main culprit.I don't mind paying a little more though because I have found Element14 to have a very quick delivery time on most stuff.

author: DTJ
author_rank: Super Contributor
timestamp: May 08, 2015, 07:09:38 am
content: Sure, I don't mind paying a bit more, I'd even wait longer. Over double the price seems a bit over the top.On the bright side, at least these companies are now allowing low volume purchases.

author: David_AVD
author_rank: Super Contributor
timestamp: May 08, 2015, 10:31:51 pm
content: You guys know that you can ask E14 and RS for a quote right?Simply tell them what you want and a target price (on the screen form) and they'll quote you. It can take a day to process though.I've had some very good pricing come back at times - cheaper than Digikey / Mouser. Other times not so good, but still cheaper than the web price.Obviously it's not practical for when you just need to order a few bits and pieces.

author: Cliff Matthews
author_rank: Unknown
timestamp: May 08, 2015, 11:45:17 pm
content: Quote from: mswhin63 on May 07, 2015, 10:01:05 amFamiliar.. but we in Canada have been forced to expect things to be very expensive from any US company who sets its foot down just over the worlds longest unguarded boarder. Price difference? Sometimes I just wish the bullying would stop and two nation's would become "The North American Union"For any interested in what living next-door to an 800lb gorilla (with guns) looks like, check our friend Amazon.ca.

author: wagon
author_rank: Frequent Contributor
timestamp: May 09, 2015, 10:47:10 am
content: I get special prices for stuff from Element14 regularly. Just ask, can't hurt.
DMCA be damned. You can hack your Tesla - Page 1
Forum section: electronics / general

author: LabSpokane
author_rank: Super Contributor
timestamp: May 08, 2015, 04:44:23 pm
content: http://www.technologyreview.com/news/537251/some-tesla-owners-pimp-their-rides-with-code/All that's needed now is for Tesla to build electric farm implements.

author: tom66
author_rank: Super Contributor
timestamp: May 08, 2015, 07:44:14 pm
content: Tesla aren't as open as they seem to be. This is just the API between the phone app and the Tesla servers. As far as the car itself, they are pretty closed.There was a thread a while back on a Tesla fan forum where people had figured out how to access the internal ethernet network between the two displays. One guy managed to SSH into the drivers console and bring up Firefox via Xorg. Tesla told him to stop or they would void the entire car warranty (they were monitoring his access !) They were getting access to loads of useful data, like the raw battery energy available in kWh, but they stopped because no one wants a $100k brick.

author: Sigmoid
author_rank: Frequent Contributor
timestamp: May 08, 2015, 07:59:31 pm
content: They can void the warranty sure, but I didn't quite get the whole DMCA thing about the farm implements either... There was a precedent about jailbreaking iPhones not being illegal at all - circumventing protection is NOT an offense if its goal is not to make illicit copies of someone's IP, but to make some device I own do what I want to do (like run custom code).If they monitor the car over the Internet, then I wouldn't buy one even if I could spare $100k for a car I can't even take for a cross-continental trip for lack of charging stations. I've recently started considering phasing out of all my Apple stuff as well and moving to hand-built Linux.

author: suicidaleggroll
author_rank: Super Contributor
timestamp: May 08, 2015, 08:19:04 pm
content: Yeah I'm not following the DMCA or electric farm implements comment either...accessing the comms between the phone app and the Tesla servers to log data about your own car isn't copyright infringement.

author: LabSpokane
author_rank: Super Contributor
timestamp: May 09, 2015, 04:05:15 am
content: Umm guys. It was a joking reference to the John Deere thread.Tesla does seem to be taking a far more moderate stance. Voiding a warranty for hacking the computer (totally understandable IMO) is a far cry from a $1M USD fine and five years in prison that could result.
Keysight in Walmart? - Page 1
Forum section: electronics / general

author: blueskull
author_rank: Unknown
timestamp: May 06, 2015, 11:32:47 pm
content: Maybe I lived under a stone for too long, but... Does Walmart sell scopes?http://www.walmart.com/ip/KEYSIGHT-TECHNOLOGIES-DSO1004A-Digital-Oscilloscope-4-Channel-60-MHz-G2184786/42010218?sourceid=csesh02baeae10ea19e49989fbd9da4a67f6bd5&wmlspartner=shoppingcom2&affcmpid=1812332574&tmode=0000&veh=cse&sdc_id=1430954962z999543z4f073b0a11218z&amp=&affwt=popupBlankKeysight scopes under health category?

author: PedroDaGr8
author_rank: Super Contributor
timestamp: May 06, 2015, 11:35:34 pm
content: Quote from: blueskull on May 06, 2015, 11:32:47 pmSee the part that "Sold by Zoro" it is a third party vendor on Wal-Marts marketplace.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: May 06, 2015, 11:36:34 pm
content: QuoteIt's like Amazon.

author: JoeN
author_rank: Frequent Contributor
timestamp: May 07, 2015, 12:46:18 am
content: Quote from: blueskull on May 06, 2015, 11:37:23 pmEven NewEgg has something like this now. I don't like it. I buy from NewEgg because I want them fulfilling my order because I think they know what they are doing. I'd rather not deal with random_internet_vendor_2015:) instead.

author: zapta
author_rank: Super Contributor
timestamp: May 10, 2015, 09:46:51 pm
content: Quote from: JoeN on May 07, 2015, 12:46:18 amSo is Sears. In this example, sold by Neobits.comhttp://www.sears.com/keysight-technologies-dsox2004a-oscilloscope-4-channel-70-mhz/p-SPM7663087723?prdNo=1&blockNo=1&blockType=G1http://www.sears.com/hakko-fx-888d-esd-safe-digital-soldering-station/p-SPM7481090523?prdNo=2&blockNo=2&blockType=G2
Real-life Star Trek 'replicator' prepares meal in 30 seconds - Page 1
Forum section: electronics / general

author: Shock
author_rank: Super Contributor
timestamp: May 07, 2015, 08:34:07 am
content: This story has more fluff than a Tribble.http://www.reuters.com/article/2015/05/05/us-israel-meals-on-demand-tracked-idUSKBN0NQ1PG20150505

author: rob77
author_rank: Super Contributor
timestamp: May 07, 2015, 10:36:11 am
content: Quote from: Shock on May 07, 2015, 08:34:07 amare we really that far into the degradation process ? are we really that close to the end ? it makes me sad andat the same timebtw.. we have start-trek replicators which are able to make various flavors of coffee - and we have theme everywherejust drop your 1 euro coin and it will start-trek-replicate a plastic cup of coffee for you

author: AndyC_772
author_rank: Super Contributor
timestamp: May 07, 2015, 10:48:10 am
content: So, they've basically invented Pot Noodle?

author: rob77
author_rank: Super Contributor
timestamp: May 07, 2015, 11:15:18 am
content: Quote from: AndyC_772 on May 07, 2015, 10:48:10 amyep , without the noodles

author: JackP
author_rank: Regular Contributor
timestamp: May 07, 2015, 11:37:06 am
content: So Pot?

author: Mechanical Menace
author_rank: Super Contributor
timestamp: May 07, 2015, 04:18:51 pm
content: This isn't a replicator, it's a vending machine. It's not a replicator until you put nothing but energy in and get a pint out.
Getting used to having a high bench. - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 08, 2015, 10:33:41 am
content: I've just got a pre-loved bench. 1700mm x 800mm x 32mm thick. The bench top is a whopping 970mm from the floor. I thought I would cut down the sides to a bring it to regular desk height, but I do like the raised height for working on things whilst standing as did the previous owner and therefore can't decide if I should lower the height of the bench just yet.I don't own a high bar style chair yet so I already find the height annoying only when I'd like to sit at the bench. Do you suggest any high chairs? What do I look for?The other option is to hunt around for a powered height adjuster. Have any of you tried these and how do you rate them? The unit weighs 120kgs (yes) empty! So I'd want a hefty motor. It's got a full back on it and a little shelf for gear so it's pretty solid.If you've got a tale to tell about your high bench please share.

author: Fred27
author_rank: Unknown
timestamp: May 08, 2015, 10:41:41 am
content: You definitely want something around the 93-97cm height for any standing work, and around the 73cm height for sitting at a desk.My previous workbench was 93cm with a bar seat and that was OK, although I found myself mostly standing rather than sitting. Ikea do a cheap but good enough one.I'm just building some workbenches now for my new workshop. I'm spoilt for space (or it feels that way right now) so I've gone for about 2m wide at sitting height to use as a desk (for CAD/coding/debugging firmware) and 4m at standing height when making stuff (mill/laser/lathe).

author: Mechanical Menace
author_rank: Super Contributor
timestamp: May 08, 2015, 10:49:02 am
content: All of my work surfaces at about 1 meter (depending on the floor lol) and a standard adjustable computer chair works for me, you could give that a go.

author: German_EE
author_rank: Super Contributor
timestamp: May 08, 2015, 09:40:44 pm
content: Take a look at how jewellers and watchmakers work, they have high benches but low seats so that they don't have to bend down to get closer to their detailed work. I'm not sure if I could do it all day though.

author: RobertHolcombe
author_rank: Frequent Contributor
timestamp: May 09, 2015, 12:29:54 am
content: I'd definitely leave the bench the way it is and buy a higher chair (drafting chair), because its more versatile being able to adjust your working position than having to raise or lower the bench.

author: atferrari
author_rank: Frequent Contributor
timestamp: May 09, 2015, 04:59:28 pm
content: Quote from: German_EE on May 08, 2015, 09:40:44 pmYes but what I know from their work, they seem to need less looking at something from above.I tried that trick and found myself standing up rather often to see things with good light (coming from above).
Looking for Research Participants Who Love Deals - Page 1
Forum section: electronics / general

author: ElecResearch
author_rank: Newbie
timestamp: May 05, 2015, 05:52:37 pm
content: Hello Deal Lovers!My organization is seeking some participants for our research on individuals who love shopping for electronics online, and especially those who love deals. Even better if you live in the Los Angeles area!If you are selected to participate, you will be compensated with a $100 Amazon Gift Card. The study is pretty casual and straight-forward, and involves us asking basic questions about your shopping behaviors and preferences. We may also have you show us how you normally shop for electronics, or use price-tracking / deal-finding methods.If interested, please fill out this preliminary screener, to make sure your background fits what we are looking for:website removedThanks for your time!

author: Shock
author_rank: Super Contributor
timestamp: May 05, 2015, 09:20:42 pm
content: Quote from: ElecResearch on May 05, 2015, 05:52:37 pmBusiness name, address and website of your organization?Your full contact details and position held within this organization?What country do you reside in?Perhaps explain why you aren't like every other spammer/scammer who asks for this sort of information.

author: GreyWoolfe
author_rank: Unknown
timestamp: May 05, 2015, 10:28:18 pm
content: This should be a Facebook add.

author: tggzzz
author_rank: Super Contributor
timestamp: May 05, 2015, 11:14:45 pm
content: Quote from: Shock on May 05, 2015, 09:20:42 pmProbably get something nastily contagious if you followed their link!

author: xrunner
author_rank: Super Contributor
timestamp: May 05, 2015, 11:19:17 pm
content: Quote from: ElecResearch on May 05, 2015, 05:52:37 pmFill out a screener? Like you prolly want my SSN, bank account, and mothers maiden name for security purposes.

author: kakureru
author_rank: Contributor
timestamp: May 06, 2015, 05:05:46 am
content: I know a prince in Nigeria who needs YOUR help.
Solar Panels Question. - Page 1
Forum section: electronics / general

author: snipersquad100
author_rank: Frequent Contributor
timestamp: May 06, 2015, 11:13:03 am
content: Im running a 12v battery bank and using 2 identical 175W 37v solar panels in parallel to give me 350watts at 37volts to charge the bank. I've got hold of another 175w panel but only 30v open circuit. Can I put this in parallel with the other two panels? if so what would happen to the voltage.Thanks

author: firehopper
author_rank: Frequent Contributor
timestamp: May 06, 2015, 12:23:10 pm
content: get a 3 input solar charge controller!

author: suicidaleggroll
author_rank: Super Contributor
timestamp: May 06, 2015, 03:12:00 pm
content: Quote from: snipersquad100 on May 06, 2015, 11:13:03 amYou'd be wasting the power of the 30v panel by not running it anywhere NEAR its MPP (maximum power point).Hopefully you're using a charge controller anyway, in which case just give the 30v panel its own.

author: snipersquad100
author_rank: Frequent Contributor
timestamp: May 06, 2015, 04:39:47 pm
content: Im using a 400w pwm charge controller and was planning on upgrading to a mppt controller which can handle around 550-600 watts.So you think I should use a separate charge controller per different voltage panel, and that's ok to connect to the same batteries?I did make a mistake, the new panel is 185 watts not 175.

author: suicidaleggroll
author_rank: Super Contributor
timestamp: May 06, 2015, 05:00:19 pm
content: Quote from: snipersquad100 on May 06, 2015, 04:39:47 pmYou should ask the manufacturer of the MPPT controller, but chances are yes it will work fine. If there's a chance one of the two panels you currently have in parallel will be shaded while the other is not, or if they're pointing in different directions, you might consider using separate MPPT controllers (or separate panel inputs on a multi-input MPPT controller) for them as well.

author: electr_peter
author_rank: Unknown
timestamp: May 06, 2015, 05:08:23 pm
content: Add low Vfdiodes in series with panels if you have parallel configuration. 37V panels likely have max power at less than 30V anyway.

author: snipersquad100
author_rank: Frequent Contributor
timestamp: May 06, 2015, 05:14:53 pm
content: Thanks for the help guys.

author: mtdoc
author_rank: Super Contributor
timestamp: May 06, 2015, 05:15:34 pm
content: To ensure reasonable efficiency, panels (or strings of panels) in parallel should have close to the same voltages (Voc and Vmp) - within 10% or so. For panels in series Imp should be close to the same (also withing 10% or so).As noted, with those panel voltages. for a 12 V system you'll have very poor efficiency without an MPPT controller.
New fast turnaround large scale 3D printing service goes online in USA - Page 1
Forum section: electronics / general

author: nixfu
author_rank: Unknown
timestamp: May 05, 2015, 03:17:59 pm
content: Quotehttp://money.cnn.com/2015/05/04/smallbusiness/cloudddm-3d-printing-factory-ups/More:http://3dprint.com/62642/cloudddm-ups/More:http://www.cloudddm.com/I wonder what the costs are.
Old Harman Kardon Stereo with NO circuit boards, all hand soldered hornet's nest - Page 1
Forum section: electronics / general

author: Steve Wayne
author_rank: Contributor
timestamp: May 05, 2015, 02:35:40 am
content: Just for show & share,, I thought this old (mid 1960's?) Harman Kardon SR-900 receiver was quite amazing to find it with no circuit boards and all through hole, hand soldered components. I'm sure Dave would have enjoyed the smell, but it would cost a small fortune to ship it from the US. Take a look…

author: Len
author_rank: Frequent Contributor
timestamp: May 05, 2015, 05:16:21 am
content: It's called point-to-point wiring and it's the way everything used to be done. And if you think that's a hornet's nest, take a look at a typical TV set:

author: T3sl4co1l
author_rank: Super Contributor
timestamp: May 05, 2015, 06:03:46 am
content: Shame, looks like someone pulled all the (socketed!) RF transistors. Probably 2N3904 would work (unless they were PNP, which might well be the case if they used mesa germanium).Seems unlikely those perfboards on the top controls are original, kind of curious what history it might have.And yes, boys and girls, early transistor sets used output transformers to drive the speakers!Tim

author: German_EE
author_rank: Super Contributor
timestamp: May 05, 2015, 10:41:42 am
content: Some radio amateurs carry on a similar tradition in home construction, they call it 'ugly' construction. Tag strips are now difficult to obtain so if you have a junction suspended in mid air then solder a 1M ohm resistor from the junction to the PCB ground plane, it works just fine.http://www.k4gc.com/ugly%20things.htmlI prefer a technique called 'Manhattan' where small PCB pads are glued down to support partshttp://www.k8iqy.com/qrprigs/2n215/2n215081e.jpghttp://www.k8iqy.com/qrprigs/2n240/2n240216.jpg

author: rolycat
author_rank: Super Contributor
timestamp: May 05, 2015, 11:41:22 am
content: Alan Wolke (w2aew on the forum) has some good videos on construction techniques including Manhattan-style and island cutting, particularly this excellent summary:

author: John Coloccia
author_rank: Super Contributor
timestamp: May 05, 2015, 11:57:35 am
content: Quote from: German_EE on May 05, 2015, 10:41:42 amStandard way of doing it these days is with eyelet or turret boards. I always thought tag strips were turret board's ugly, annoying sister, anyway.

author: Sigmoid
author_rank: Frequent Contributor
timestamp: May 05, 2015, 02:25:21 pm
content: Quote from: German_EE on May 05, 2015, 10:41:42 amThis isn't ugly at all. It looks like a work of art.I knew there has to be a way to prototype RF.

author: German_EE
author_rank: Super Contributor
timestamp: May 05, 2015, 06:56:54 pm
content: Manhattan works very well at RF. There is one amateur who works as an engineer at the VLA in New Mexico and he uses Manhattan PCBs well beyond 1 GHz. The large ground plane means a stable circuit.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: May 05, 2015, 07:01:13 pm
content: Quote from: Sigmoid on May 05, 2015, 02:25:21 pmIt's also translucent,http://seventransistorlabs.com/Images/Glow.jpgTim
My 3rd video-review (AoE) - would appreciate criticism / tips - Page 1
Forum section: electronics / general

author: Blofeld
author_rank: Regular Contributor
timestamp: May 04, 2015, 08:18:04 pm
content: The 3rd video I ever uploaded, and the first where I tried to get along without some liquid courage. It is about chapters 10-15 (mostly digital electronics) of the new AoE. I would appreciate any criticism and tips for improvement.
newbe oscilloscope question - Page 1
Forum section: electronics / general

author: Hans Mortensen
author_rank: Contributor
timestamp: May 03, 2015, 09:58:15 pm
content: I recently obtained a 30M Hz oscilloscope and was messing around with it when I touched the probe end and got a somewhat sinusoidal frequency at 16.8 thousand Hz and an amplitude of 1V. and I was wondering what it could be? All I know is that it gets less noise when I turn off all nearby electrical divices and is completely eliminated when I touch the ground lead. Any info would be great Thanks

author: kakureru
author_rank: Contributor
timestamp: May 03, 2015, 10:32:03 pm
content: probably near by switching PSU being noisy.

author: Howardlong
author_rank: Super Contributor
timestamp: May 03, 2015, 10:35:41 pm
content: Or fluorescent light.

author: KJDS
author_rank: Super Contributor
timestamp: May 04, 2015, 06:42:35 am
content: line scan rate of a CRT
Visible return current - Page 1
Forum section: electronics / general

author: dadler
author_rank: Unknown
timestamp: May 02, 2015, 07:00:25 pm
content: http://www.sigcon.com/Pubs/news/8_08.htmI am sure some of you have seen this before, as it's on Dr. Howard Johnson's site.The pictures are great.

author: Zero999
author_rank: Super Contributor
timestamp: May 03, 2015, 01:46:37 pm
content: I'm not convinced this is an accurate demonstration of this because the breakdown voltage of the spark gaps will dominate the inductance.The arc only tracks the inductor because the intense electric field produced by it will be coupled to the spark gap and reduce its breakdown voltage substantially.

author: SArepairman
author_rank: Frequent Contributor
timestamp: May 04, 2015, 10:25:38 pm
content: mikes electric stuff did another take on this by using a contact fluxgate magnetometer, LED and long exposure time. its on youtubethe brighter the LED = more current. you just use the fgm like a wand and scan the ground plane, and it looks like a glowly blur of current magnitude (and you can even do direction (using diff color lights), since the FGM will tell you the current direction by its sign.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: May 05, 2015, 12:54:36 am
content: A high voltage pulse will exhibit the same path due to electrostatic induction. It's not wrong, because in a linear system, electric and magnetic fields will be correct at DC as well as at HF (as transmission line). But it's not fair to say it's the electromagnetic path taken; the sparks jump due to electric field only, and thereafter can only be pushed by magnetic fields. They won't jump between corners and reorganize.Tim
Firefighters ladders - Page 1
Forum section: electronics / general

author: atferrari
author_rank: Frequent Contributor
timestamp: May 01, 2015, 08:46:58 pm
content: My modelist brother is interested to know how these ladders were used. Basically as a stand alone unit or linked to the truck all the time?I could not find anything close to it in the Web. Any idea?

author: SeanB
author_rank: Super Contributor
timestamp: May 01, 2015, 08:54:50 pm
content: Looking at the coach wheels they were originally horse drawn ladders, so were likely used by being taken to the fire, then wheeled around by hand to get to a location then they were manually extended and were propped against the building wall.they probably kept them when changing to trucks, and as the trucks were modernised these ladders stayed as part of the newer vehicles. I did see a NY fire dept video on YT where they had the ladder shop on display, and how some of the ladders they use are a century or more old and still in good condition and still in service.

author: Galenbo
author_rank: Super Contributor
timestamp: May 02, 2015, 01:28:45 am
content: The construction of the ladder looks far more lightweight than the truck.I suppose they come on site, drive to where this heavy 2x4 pump truck can get, and if needed, pull only the ladder through unhardened roads.

author: SL4P
author_rank: Super Contributor
timestamp: May 02, 2015, 02:36:31 am
content: Possibly some of these earlier trucks were gas/petrol powered - and better kept away from the flames!Once diesel came in i that would have changed for the better!

author: atferrari
author_rank: Frequent Contributor
timestamp: May 02, 2015, 12:10:39 pm
content: Nothing better than an image.Gracias to all replying.
Hacking a analog multimeter. Soldering the selector permanent. - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: April 30, 2015, 11:46:43 pm
content: I've got a Jaycar Multi analog cheapy meter that has crapped out. Wanting to remove the selector knob and wiper and hard wire the board in it's 250VAC range mode and then drill the side and solder in a power cord and mount to the wall for permanent mains monitoring.There are three tracks which must be shorted.Would like to know if you have any thoughts about how to solder said tracks.

author: codeboy2k
author_rank: Super Contributor
timestamp: May 01, 2015, 12:04:20 pm
content: Seriously? Just jumper them with a short wire soldered onto the track

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 01, 2015, 12:39:41 pm
content: Quote from: codeboy2k on May 01, 2015, 12:04:20 pmJust thought I'd run it past you lot in case there was something dumb I overlooked. Costs me nothing to ask.

author: SeanB
author_rank: Super Contributor
timestamp: May 01, 2015, 01:03:23 pm
content: Just be careful that the resistors on the incoming voltage divider may not really be rated for permanent connection to mains, they might be limited by either voltage or power. Fine for a few seconds of connection to mains, but long term it may be problematic, they likely will go open circuit.As to making it fixed range, go ahead, just remove all the metal parts of the selector and make sure the jumpers will not catch if the knob is turned. As well mark the meter as fixed range.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 01, 2015, 03:08:09 pm
content: Quote from: SeanB on May 01, 2015, 01:03:23 pmGood to know.Got a feeling that's what is wrong already because meter is playing dead. Was going to duct tape/gaffer tape over the lower half of the meter and write on it 0-250VAC. Meter has a LED continuity indicator and I thought I'd make that light up when power is on.

author: SeanB
author_rank: Super Contributor
timestamp: May 01, 2015, 03:26:32 pm
content: You probably will find they used 0.125W resistors inside, which are not exactly rated for use over 100V. You will need to use a pair of equal value ( or within 20%) 0.5W resistors in series for it to be safe for mains use.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: May 01, 2015, 10:32:50 pm
content: Quote from: SeanB on May 01, 2015, 03:26:32 pmThanks.And happy 10k posts btw.

author: SeanB
author_rank: Super Contributor
timestamp: May 02, 2015, 05:58:01 am
content: Quote from: Ed.Kloonk on May 01, 2015, 10:32:50 pmbeen there before......I need to get a life.......

author: Muttley Snickers
author_rank: Unknown
timestamp: May 02, 2015, 09:20:05 am
content: Jaycar have a lifetime guarantee on that meter, if it was mine that was playing up I would take it back and get a working one. I blew up one of their cheap digital meters when I hooked it up to the primary and then put 240 volt on the 12 volt secondary of a transformer, mixed up the colors of the in and out.Anyway, they took it back and gave me a new one to destroy.Muttley
This Ebay Listing Makes Me Sad - Page 1
Forum section: electronics / general

author: eas
author_rank: Frequent Contributor
timestamp: May 01, 2015, 06:52:28 pm
content: TTC T-Berd 211 Portable T-Carrier Analyzer T1/T1C Test Telecom Utility PARTSUnit is missing most of its pegs.Dimensions (L”*W”*H”): 8 ¼ * 14 ½ * 7 ¼ approxAnd those dimensions don't seem quite right either.

author: SeanB
author_rank: Super Contributor
timestamp: May 01, 2015, 07:02:34 pm
content: Reminds me of this....http://freefall.purrsia.com/ff2700/fc02647.htm

author: Rick Law
author_rank: Super Contributor
timestamp: May 01, 2015, 08:59:34 pm
content: Well, it is a good way to say, this piece of equipment is going to "run like a dog".I gotta go get some more dog-chow for my router. It is running a little slow.

author: bitwelder
author_rank: Super Contributor
timestamp: May 02, 2015, 07:59:36 am
content: I agree with the sadness of the subject in the photo: they promised you to make your cause with an 'Adopt me, please!' campaign but all you got is to be sold on ebay FOR PARTS.
Random stuff on Youtube - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: April 29, 2015, 08:37:28 pm
content: Had this pop up today. Interesting in some places, like the spinning clock and the solar powered 3d printer.

author: miguelvp
author_rank: Super Contributor
timestamp: April 30, 2015, 04:54:30 am
content: I liked the jack with the cordless drill at the end the most, yeah I have simple needs

author: Stonent
author_rank: Super Contributor
timestamp: April 30, 2015, 05:26:22 am
content: Can anyone identify the reel to reel tape player used in the beer dancing scene? That appears to be the exact one that we had at my house when I grew up.

author: helius
author_rank: Super Contributor
timestamp: April 30, 2015, 05:30:37 am
content: Quote from: Stonent on April 30, 2015, 05:26:22 amSony TC-366

author: Stonent
author_rank: Super Contributor
timestamp: April 30, 2015, 05:52:26 am
content: Quote from: helius on April 30, 2015, 05:30:37 amHow did I know someone would know that right away? Since posting I started googling every 1970's era electronics brand followed by reel to reel until I started finding some styling similarities. I found a Sony TC377 that looked almost identical, but the switches and buttons were more metalized. So I started going through the Sony line and had just found the 366 and came back to report it.I remember as I kid thinking I could turn it into a vcr by connecting the video out from my computer to the audio in of it, but it never worked.I loved the big knob on the right side. I remember my mom had bought some 8-track tapes at the drug store for 25 cents each to salvage for parts to fix some of her old 8-track tapes where the foam had disintegrated and that had left us with lots of spools of 8 track tape that was of no use. I wound the tape on some reels and was surprised that I could play the music on the reel to reel. (It seems obvious now, but back then, I was amazed)

author: V8Dieselpower
author_rank: Newbie
timestamp: April 30, 2015, 07:24:52 pm
content: Quote from: GK on April 30, 2015, 12:37:31 pmOh how much trouble could I get into lol. Youtube gives me so many bad ideas
BLDC motor from a floppy drive - Page 1
Forum section: electronics / general

author: tbj
author_rank: Contributor
timestamp: April 30, 2015, 05:22:49 pm
content: Hi.I salvaged this BLDC motor from a floppy drive and it doesn't appear to have a hall sensor. I'm wondering if the axial inductor is used to sense rotor position instead?Any ideas?Cheers

author: SeanB
author_rank: Super Contributor
timestamp: April 30, 2015, 05:40:31 pm
content: There will be 3 hall sensors there, probably buried under the steel backing plate. The axial inductor around the edge is there for the rotational velocity feedback loop only, and the tacho pulse.
Wearable Device - Page 1
Forum section: electronics / general

author: Mike Warren
author_rank: Unknown
timestamp: April 30, 2015, 01:53:34 am
content: Finally, a useful wearable device.http://www.engadget.com/2015/04/29/ch4-bum-trumpet-sensor/

author: pickle9000
author_rank: Super Contributor
timestamp: April 30, 2015, 01:58:21 am
content: Next up, charge you iphone from your ass.

author: Mike Warren
author_rank: Unknown
timestamp: April 30, 2015, 03:58:55 am
content: Quote from: pickle9000 on April 30, 2015, 01:58:21 amHmm, unlimited free energy!
Calculator With MOD - Page 1
Forum section: electronics / general

author: TheEPROM9
author_rank: Frequent Contributor
timestamp: April 02, 2015, 02:02:01 pm
content: Does anyone know any models of calculators with MOD functionality, I am doing a computer security course and need it for the exam.Thanks in advanced.

author: Zero999
author_rank: Super Contributor
timestamp: April 02, 2015, 02:17:24 pm
content: I just subtract the integer part of the number and multiply it by the original divisor.e.g.10 MOD 3 =10/3 = 3.333333333333333333333.33333333333333333333 - 3 = 0.333333333333333333330.33333333333333333333*3 = 1That can be done with any calculator.

author: sdg
author_rank: Regular Contributor
timestamp: April 02, 2015, 02:19:05 pm
content: HP-41c/cv/cx...

author: Tim F
author_rank: Regular Contributor
timestamp: April 03, 2015, 06:08:17 am
content: TI-36X pro has a mod function that supports binary, hex and decimal.

author: TheEPROM9
author_rank: Frequent Contributor
timestamp: April 29, 2015, 06:56:07 pm
content: Quote from: blueskull on April 02, 2015, 02:41:13 pmPrimary school was wasted years for me, learned nothing there. The state of primary schools in the UK is disgusting. I leaned my entire worth's of school education during secondary school as it was a far better school by about 1000 orders of magnitude.

author: TheEPROM9
author_rank: Frequent Contributor
timestamp: April 29, 2015, 07:05:04 pm
content: Thanks for the suggestions. No more banning my head againced a wall.I just got my self a CASIO fx-7000GA.While it lacks a MOD button it does have functions that no other calculator I have does.The furmular that works on it is:n MOD dFrac(Abs(N ÷ D)) × DFor example: frac(Abs(5^8 ÷ 43)) × 43 = 12.99999998, round up to 13 and we are all good.It seems strange that all munfactors seem to leave this out and yet it is the Windows calculator.