hybridfree/eevblog-posts huggingface dataset:
What is the difference between a "Course" and a "Tutorial"  or  "Learn" - Page 1
Forum section: electronics / general

author: ez24
author_rank: Super Contributor
timestamp: April 19, 2018, 07:20:22 pm
content: HiFrom this post :https://www.eevblog.com/forum/beginners/electronics-primers-course-material-and-books/msg1482784/#msg1482784is this link :https://core-electronics.com.au/On the their homepage is a menu item "Learn"Under Learn they have two menu items : "Tutorials" and "Courses".I then looked at my list and I have both listed:https://www.eevblog.com/forum/other-blog-specific/a/msg1341170/#msg1341170Then I realized I do not know the difference between the two (if any). Unless there is a clear distinction I would like to have one name so I could use Tutorials or Courses or Learn. "Learn" would be the easiest for me.Brumby and others - what do you think?thanks

author: hans
author_rank: Super Contributor
timestamp: April 19, 2018, 08:51:33 pm
content: Tutorials only explains one thing. Or maybe not even explain, I usually see them as a documented wizard which shows you step by step how to do things.A "course" or "workshop" is more a collection of subjects, and perhaps has some open interpretations what to do with the material to build something.

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 20, 2018, 07:06:35 am
content: Quote from: ez24 on April 19, 2018, 07:20:22 pmCourse is usually a complete subject with many chapters, sometimes includes other subjects too. Tutorial is about one particular case or skills (1 chapter may contains several skills level) and usually includes exercises. In a "course" lecture, you usually only be presented with theoritical basis of a particular subject, not much exercise, just listen and try to understand and imagine. Learn is a verb meaning you learn, if you dont pay attention in the course or tutorial, then you dont learn...

author: IanB
author_rank: Super Contributor
timestamp: April 20, 2018, 07:39:41 am
content: Quote from: ez24 on April 19, 2018, 07:20:22 pmLearn is a verb, it is something you do.A course is a course of learning. In American English it might be called a program of learning. For example a degree course (UK) or a degree program (USA) would span four years or so. On the other hand a training course on a particular subject might only last a week. The length of a course can be quite variable.A tutorial is a small, compact learning exercise on a particular subject, usually involving questions to answer or examples to complete.

author: Brumby
author_rank: Unknown
timestamp: April 20, 2018, 08:11:19 am
content: My thoughts (pretty much what has already been said):"Learn" is a broad term. It covers any form of increasing one's knowledge."Tutorial" addresses a specific topic."Course" addresses multiple topics within a common scope.There are many other avenues for learning, such as traineeships and mentoring to name a couple.
My eyesight - Page 1
Forum section: electronics / general

author: CJay
author_rank: Super Contributor
timestamp: April 19, 2018, 07:05:48 am
content: After many years I had to admit my eyes were wearing out so I finally got them tested and had a very mild prescription pair of glasses made.But...I've come to the conclusion that there's actually nothing wrong with them and that it's the rest of the world at fault, there's an LED in this picture, can you see it (it's not in the flash drive)?

author: Ampera
author_rank: Super Contributor
timestamp: April 19, 2018, 07:09:25 am
content: Is it this perchance?EDIT: if it's not that, then that fuzzy thing to the right of the flash drive looks like it could be.

author: CJay
author_rank: Super Contributor
timestamp: April 19, 2018, 07:13:47 am
content: Awhh, damn, I knew I should have resized itThat pic was taken with the camera half way between my face and the table, I swear it's not my eyesight, it's a conspiracy involving a shadowy cabal of component manufacturers and opticians.The LED isn't there any more either, it pinged off into another dimension shortly after the second picture

author: Ampera
author_rank: Super Contributor
timestamp: April 19, 2018, 07:23:22 am
content: My eyesight is so good, I can read the signs from the other end of an American Walmart!

author: G7PSK
author_rank: Super Contributor
timestamp: April 19, 2018, 08:08:42 am
content: Dosen't help that every thing is printed with soya based ink that bleeds out so that its completely fuzzy.

author: CJay
author_rank: Super Contributor
timestamp: April 19, 2018, 09:15:23 am
content: Quote from: TwoOfFive on April 19, 2018, 07:23:22 amOh I can still do that, what I can't see is the stuff right in front of my nose which is a bit of an issue for working on electronics gear

author: tggzzz
author_rank: Super Contributor
timestamp: April 19, 2018, 09:23:13 am
content: Cheap and easy experiment: try one of thesehttp://www.rolsontools.com/2-led-magnifying-visor.htmlavailable under many names from many placesGood points: multiple magnifications, wear in addition to glasses, can be used at any angle (unlike microscopes).

author: bd139
author_rank: Super Contributor
timestamp: April 19, 2018, 09:24:43 am
content: I dread to think how many SMD parts are down the cracks in my floor. If i drop one or it pings off I don't bother looking for it any more. Just get another one off the tape and start again. Fortunately SMD stuff is cheap as chips.Found it does help to work on a green cutting mat though - gives small parts some contrast.
Some superconductors can also carry currents of spin - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: April 19, 2018, 02:32:51 am
content: Isn't this interesting!https://phys.org/news/2018-04-superconductors-currents.htmlSome Superconductors Can Also Carry Currents of 'Spin'Sarah CollinsUniversity of CambridgeResearchers at the University of Cambridge in the U.K. have demonstrated that certain superconductors are also capable of carrying currents of spin. The team thinks the successful combination of superconductivity and spin could lead to a revolution in high-performance computing by dramatically reducing energy consumption. The researchers discovered a set of materials that encourage the pairing of spin-aligned electrons, enabling spin current to flow more effectively in the superconducting state than in the normal state. The team used a multi-layered stack of metal films in which each layer was only a few nanometers thick, and determined when a microwave field was applied to the films, it caused the central magnetic layer to emit a spin current into the adjacent superconductor. "The surprising result was that when we added a platinum layer to the superconductor, the spin current in the superconducting state was greater than in the normal state," says Cambridge professor Mark Blamire.
Energy/Matter... what's the difference...... - Page 1
Forum section: electronics / general

author: GlennSprigg
author_rank: Super Contributor
timestamp: April 18, 2018, 01:02:18 pm
content: Maybe, (in a 'general' forum such as this), I'm supposed to "Ask a question"..... However, maybe I may make an assumed 'statement', that others may give their opinion on???...... Let me first make a 'Statement'......The LAWS of "Conservation Of Energy", state that..... "Energy can not be created or destroyed.... It can only be transformed or transferred from one form to another, or from one object to another" . Ok, sounds good !! and I do not dispute it !!!Let's digress... (in support of Einstein) and agree that "E = MC-squared". And that in an atomic explosion, that 'specific' matter has been totally converted into massive amounts of Energy. And that, believe it or not, Scientists have put Massive amounts of 'energy' into 'splitting' atomic components not only into smaller 'particles', (starting from a Proton for example), and after MANY splits and lots of Energy, have resulted in a Proton again !!...... Re-creation of 'matter'..... So what can we surmise??LOGICALLY one can say that given the above/initial 'rules', that MATTER is but a form of ENERGY, and visa versa.....And I'm quite comfortable with that !!!!! as the 'universe' now makes so much more sense !!!!
Today's Outlaws Are Electric - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: April 16, 2018, 06:00:15 pm
content: many people think if its electric it must be slow.I did see this video, and it got me thinking, whats to stop someone bilding a DIY 150kmh electric scooter or wheelchair!looks similar or identical to a the standard unit but with deadly performance.- comments

author: Fred27
author_rank: Unknown
timestamp: April 16, 2018, 06:30:58 pm
content: I have to say that since switching to electric about 6 months ago I don't miss a petrol bike at all. Mine is a bit more legal though - aZero FXSelectric supermoto.

author: BrianHG
author_rank: Super Contributor
timestamp: April 16, 2018, 06:35:18 pm
content: Electric motorcycles have been way faster than their counterparts for a few years now.

author: Ampera
author_rank: Super Contributor
timestamp: April 16, 2018, 07:00:00 pm
content: True, but traditional bikes can be had for truly dirt cheap prices. If you have get around and you don't have much money, a bike you work on yourself is the most economical option. It's one of the main reasons many Asian countries love them so much.

author: raptor1956
author_rank: Frequent Contributor
timestamp: April 16, 2018, 07:35:01 pm
content: The Isle of Man TT added an E-bike category, TT Zero, a few years ago and the progress they're made is pretty astonishing if you ask me. The current record for a lap of 37.73 miles is 119.279mph and that's the average over the mountain course. They only do a single lap while the TT Senior race is 6 laps, but the pace from a battery powered MC is incredible given the space/weight constraints.The Isle of Man TT is, in my humble opinion, the most incredible race on the planet, frightfully dangerous, but watching these videos you almost feel you are there. I find myself leaning left and right as I watch this and the other videos.Brian

author: metrologist
author_rank: Super Contributor
timestamp: April 16, 2018, 07:40:55 pm
content: Quote from: jonovid on April 16, 2018, 06:00:15 pmIn my state, there are laws that identify various classes of e-bikes that do not require licensing. 750 watt and 28 MPH max. Above that and I believe the vehicle and driver need to be licensed as a moped or motorcycle.I bought a chinese electric wheel for my MTB and it rocks! Not as fast as this beast though fast enough to scare people walking around...I have an electric wheelchair too that would be fun to soup up to crazy speeds. I've seen a gas powered bar stool.

author: nctnico
author_rank: Super Contributor
timestamp: April 16, 2018, 07:42:13 pm
content: The most recent season of Top Gear showed some electric dirt bikes. IMHO electric motorbikes and mopeds are very useful.

author: Edison
author_rank: Frequent Contributor
timestamp: April 17, 2018, 09:21:26 pm
content: It's funny, I have in the summer house E-Scoter, it's 10 years old, has a 350W and goes 50 km / h. I use it for shopping - 10 km range on one battery (it's uphill) to the second battery 16 km (it's downhill) --- antique
FTC determines warranty void stickers are illegal - Page 1
Forum section: electronics / general

author: ncoonrod14
author_rank: Contributor
timestamp: April 11, 2018, 03:28:10 pm
content: FTC Releasehttps://www.ftc.gov/news-events/press-releases/2018/04/ftc-staff-warns-companies-it-illegal-condition-warranty-coverageMotherboardhttps://motherboard.vice.com/en_us/article/ne9qdq/warranty-void-if-removed-stickers-illegal-ftcQuote

author: Ampera
author_rank: Super Contributor
timestamp: April 11, 2018, 04:41:31 pm
content: https://www.eevblog.com/forum/chat/warranty-not-void-says-ftc/Look down for five seconds before you post.

author: Elasia
author_rank: Frequent Contributor
timestamp: April 16, 2018, 09:16:34 pm
content: Rossmann weighs in on this in style
AI Reads your Mind? - Page 1
Forum section: electronics / general

author: metrologist
author_rank: Super Contributor
timestamp: April 16, 2018, 05:53:47 pm
content: MIT AlterEgo can supposedly respond to your internal silent voice...time to assimilate...https://www.media.mit.edu/projects/alterego/overview/

author: Cyberdragon
author_rank: Super Contributor
timestamp: April 16, 2018, 06:44:57 pm
content: You're supposed to move your jaw like you're talking without opening your lips, but that is definitely externally observable, it would look like you're chewing gum with a plastic thing on the side of your face.
[movie] A Quiet Place - Page 1
Forum section: electronics / general

author: bobdabiulder
author_rank: Contributor
timestamp: April 16, 2018, 01:17:05 am
content: I just saw the movieA Quiet Placetoday. Anyone notice all the electronics equipment they had? I recognized a Hakko stand for a soldering iron.

author: aargee
author_rank: Frequent Contributor
timestamp: April 16, 2018, 04:57:42 am
content: I hope they don't have any old (and not so old) major manufacturers test gear, they'll all be in danger.

author: InductorbackEMF
author_rank: Regular Contributor
timestamp: April 16, 2018, 09:43:07 am
content: Quote from: aargee on April 16, 2018, 04:57:42 amI really hope not!
Sphere junk sale - Page 1
Forum section: electronics / general

author: apelly
author_rank: Unknown
timestamp: April 15, 2018, 11:29:17 pm
content: Just stumbled on this. Might be of interest to someone.http://www.sphere.bc.ca/test/stuffday.htmlQuoteSphere Research Corporation3394 Sunnyside Rd.West Kelowna, BC, Canada V1Z 2V4

author: Silveruser
author_rank: Regular Contributor
timestamp: April 16, 2018, 12:08:17 am
content: I'm on the opposite side of the country..There is a link part way down the page for free download of a few gig of databooks...

author: RoGeorge
author_rank: Super Contributor
timestamp: April 16, 2018, 12:20:23 am
content: The network analyzers were already sold, but thanks for the huge databooks collection

author: Ampera
author_rank: Super Contributor
timestamp: April 16, 2018, 02:11:00 am
content: Quote from: Silveruser on April 16, 2018, 12:08:17 amI know the pain.

author: mtdoc
author_rank: Super Contributor
timestamp: April 16, 2018, 03:59:53 am
content: Sphere is really off the beaten path. I’m in the same corner of the continent but still an 8 hour drive away.That’s probably a good thing...

author: aargee
author_rank: Frequent Contributor
timestamp: April 16, 2018, 04:51:56 am
content: Quote from: TwoOfFive on April 16, 2018, 02:11:00 amI'm on the opposite side of the world..

author: Ampera
author_rank: Super Contributor
timestamp: April 16, 2018, 07:51:44 am
content: Yeah, but at least Australians are used to nothing and disappointment.Now to leave before I get a chair implanted directly into my skull.
Forgot the soldering iron... - Page 1
Forum section: electronics / general

author: bitwelder
author_rank: Super Contributor
timestamp: April 14, 2018, 09:52:13 pm
content: ... turned on, for about a weekIt's a small 936 clone, so no big deal, and luckily nothing went on fire (iron also was only mildly hot).It was one of my fears as the 936 has only a (blinking) LED as visible signaling,so I did add a neon indicator on the top of the base to show when it's powered,but in its current placement towards the rear of the bench it's not very visible.Maybe next step is to add some kind of 'auto-poweroff' set to the longest reasonable soldering session.

author: Edison
author_rank: Frequent Contributor
timestamp: April 14, 2018, 10:41:01 pm
content: I'm done like this- right switch: soldering station (pen, hot air) + SMD solder tweezers- left switch: suction vapor soldering- middle: rotation - suction power control, push - lighting in the suction funnelI will certainly not overlook,

author: aargee
author_rank: Frequent Contributor
timestamp: April 14, 2018, 11:04:51 pm
content: I can’t trust myselfMy bench has one switch, it goes off when I leave otherwise I’d have stuff in all sorts of powered up states, the act of going to turn it off every time triggers a mental check of what’s still on for the next power up.There is a small power strip that is powered separately for chargers, etc

author: GreyWoolfe
author_rank: Unknown
timestamp: April 14, 2018, 11:22:14 pm
content: Quote from: bitwelder on April 14, 2018, 09:52:13 pmWhen I had my 936, I was always leaving it on. Sometimes, for a couple of days at a time before I realized it. I added a super bright red LED just above the power switch. Never left it on for long again. Maybe swapping out your LED for a super bright one will garner your attention better.

author: Electro Detective
author_rank: Super Contributor
timestamp: April 15, 2018, 01:09:56 am
content: Put the bench power, or select group of items, on a generic basic timer,dial up the hours you think you may spend working,and once gone if you 'think' you forgot to switch stuff off, the timer will kick in and kill the lot,and save you drama

author: amyk
author_rank: Super Contributor
timestamp: April 15, 2018, 04:19:14 am
content: Look on the bright side, the fact that it didn't melt and catch fire even after a week means you don't need to be worried about leaving it on anymore.

author: Electro Detective
author_rank: Super Contributor
timestamp: April 15, 2018, 09:27:48 am
content: Quote from: amyk on April 15, 2018, 04:19:14 amI wouldn't take that wishful thinking to the bank, or casino...
Getting them interested - Page 1
Forum section: electronics / general

author: larrybl
author_rank: Regular Contributor
timestamp: April 14, 2018, 03:18:45 am
content: We scored a mint 130 and one electronics kit for $2.00 at a local flea market. Yea it is 2000 era, but he has completed the first two circuits successfully, and is working on the third now. Doesn't want my help now as he figured out how to connect the wires in sequence. He wants to do all 130 circuits..... we will see.PS, I don't post much, but thought this may be of interest.

author: Ampera
author_rank: Super Contributor
timestamp: April 14, 2018, 03:22:24 am
content: Oh man, I remember my electronic Snap Circuits/Snap Kits/Snap Whatevers as a kid. Got the first kit from radio shack and a second one a bit later. Some of the bits are missing (and the some of the caps are gone making the AM radio a bit hard (I could just wire up another one of similar spec no problem if I needed to), but I remember those. I got my first kid when I was 3-4, all the way back in the space year 2005-ish. Straight from Radio Shack (RIP?).I have something similar to this, but it has a full breadboard and the like. Didn't really touch it much, as I don't think it still works. I've either way upgraded to messing about with old computers as my primary source of EE entertainment.These sorts of kits were exactly what sparked my interest in EE, and are what I try to remember as inspiration and as a pick-me-up.

author: larrybl
author_rank: Regular Contributor
timestamp: April 14, 2018, 03:29:52 am
content: Thanks, he seems very interested in it. I help when I can.

author: larrybl
author_rank: Regular Contributor
timestamp: April 14, 2018, 03:34:04 am
content: Had birds chirping and cats meowing. May get interesting when we get to the digital circuits. Good refresher for me.

author: larrybl
author_rank: Regular Contributor
timestamp: April 15, 2018, 04:11:02 am
content: The Thinker, We (he) has completed 14 circuits so far and only 1 didn't work and we will re visit it. Circuit 15 will be interesting as it will charge a capacitor to 90+ volts, and discharge through a transformer to create a spark. I have a VOM (I explained what that was to him) as the instructions indicate to check the voltage, And I will see if my spark plug tester indicates the spark. Cool stuff so far!
Great prices now from Dicikey! - Page 1
Forum section: electronics / general

author: Greg Robinson
author_rank: Regular Contributor
timestamp: April 14, 2018, 10:58:50 pm
content: Hi everyone, thought you all might get a chuckle out of this one.So I was searching on eBay for a part I'm considering using, to see if there were any pre-built/kit boards to check it out before designing my own boards, and this seller came up:Here's alinkto that listing.There's some excellent engrish in the description too.No idea if Digikey is already aware (or cares), but I shot them an email.
Anyone want to learn about Valves? - Page 1
Forum section: electronics / general

author: MosherIV
author_rank: Super Contributor
timestamp: April 01, 2018, 03:11:14 pm
content: HiOne of my colleagues at The National Museum of Computing asked me to post here inviting you to his valve workshop.http://www.tnmoc.org/news/upcoming-events/valve-workshop-returnshttps://www.eventbrite.co.uk/e/the-national-museum-of-computing-valve-workshop-tickets-44139294819So, if you ever wanted to know about Valves, come along.Both the analogue (yes, you audiophiles who want to build a valve amp) and the digital side are covered.

author: Ash
author_rank: Regular Contributor
timestamp: April 02, 2018, 02:53:43 am
content: That sounds like it would be an awesome event. I've been following some of their computer rebuilds.Unfortunately time, money and living on the other side of the planet conspire against meAsh.

author: Ampera
author_rank: Super Contributor
timestamp: April 02, 2018, 03:39:46 am
content: Why did I think that this would have been about pipe valves before I clicked it.

author: Stray Electron
author_rank: Super Contributor
timestamp: April 03, 2018, 12:15:07 am
content: Quote from: TwoOfFive on April 02, 2018, 03:39:46 amBecause the Brits and most of their later offspring never learned what a vacuum tube was. <ducking>

author: g0hjq
author_rank: Unknown
timestamp: April 04, 2018, 11:09:54 am
content: That looks really interesting ... and a real change from the usual microprocessors and SMDs I play with.A friend and I have both I've signed up for the two days. Should be good.

author: MosherIV
author_rank: Super Contributor
timestamp: April 14, 2018, 07:22:30 pm
content: BumpSpaces still available.
question about drone controller - Page 1
Forum section: electronics / general

author: Fr34k
author_rank: Newbie
timestamp: April 13, 2018, 07:24:25 pm
content: i am making a drone which can support human weight like in the following videowhat off the shelf flight controller can i use?

author: ikrase
author_rank: Regular Contributor
timestamp: April 13, 2018, 07:47:55 pm
content: None of them. No low-cost drone-usage controller is rated for manned air flight.For a somewhat less disappointing answer, you should probably go for the simplest possible option once you evaluate reliability. Unfortunately there's no really good reliability testing of drone controllers that I've seen.Don't forget signal wiring and joysticks and the like. ALL of this stuff must be perfectly reliable /vibration and EMI resistant or you will die.
GE bulbs of yesteryear - Page 1
Forum section: electronics / general

author: georges80
author_rank: Frequent Contributor
timestamp: April 10, 2018, 07:14:16 pm
content: Was at GE (Nela park) last year and took some snap shots in the foyer of the building we were in.Figured some might get a kick from the pics. Felt pretty remarkable to be at that facility.cheers,george.

author: helius
author_rank: Super Contributor
timestamp: April 10, 2018, 07:29:51 pm
content: When I moved into this house there was an Edison bulb installed (a commercial one, not a prototype). It had a very long looped (carbon?) filament. It burned out, unfortunately.

author: rstofer
author_rank: Super Contributor
timestamp: April 10, 2018, 07:37:18 pm
content: Been there! I don't know if they still have it but one of the presentation rooms has light fixtures that can be rotated such that 3 different fixtures can fit the same opening in the ceiling. They can completely change out the color rendering index at a push of a button by swapping out the fixture.It's am impressive campus!

author: Vtile
author_rank: Super Contributor
timestamp: April 10, 2018, 08:03:06 pm
content: What is more impressive is the fact that in the early 20th century they (I suppose not GE) used to refurbish these light bulbs.

author: Cyberdragon
author_rank: Super Contributor
timestamp: April 13, 2018, 05:09:46 am
content: Quote from: helius on April 10, 2018, 07:29:51 pmIt was probably only rated for 100V to 110V, not 120V...no wonder it died. RIP You can get modern replica carbon bulbs rated for 120V.

author: calexanian
author_rank: Super Contributor
timestamp: April 13, 2018, 05:50:47 am
content: Look at those copper housekeeper seals on that 50KW bulb. Serious business there. I might make up some hand made bulbs when I get the time. I have some .005 non sag wire which roughly works out to a 100 watt 120 volt bulb, and the thing to use in incandescent light bulbs.

author: SL4P
author_rank: Super Contributor
timestamp: April 13, 2018, 06:54:09 am
content: I wouldn't want to be standing around if that 50KW bulb 'popped'Which also suggests it must have had a decent fan to stay cool.

author: calexanian
author_rank: Super Contributor
timestamp: April 13, 2018, 05:06:19 pm
content: That bulb was most likely made from Nonex glass. Closer to Pyrex than the lime glass most bulbs are made of. There is also a chance it’s made of vycor. Very close to fused silica. Much more thermal stability and higher melting point. Also higher heat emisivity and dissipation per square cm.

author: james_s
author_rank: Super Contributor
timestamp: April 13, 2018, 05:18:42 pm
content: That's cool, my friend has a 10kW studio lamp of a similar style, I'd never seen a 50kW lamp though. As I recall they were convection cooled in very large fixtures. It was not uncommon for the glass to develop bulges after some use.
Can anyone identify this LCD? - Page 1
Forum section: electronics / general

author: getsmedown
author_rank: Newbie
timestamp: April 13, 2018, 12:24:44 pm
content: Hi,I wonder if anyone can identify the manufacturer and model of the LCD below that’s used on ST Microelectronics X-NUCLEO-LPM01A power consumption measurement board. Unlike other development boards from ST, this one doesn’t appear to have the schematic and BOM available, so I can’t find the manufacturer/model. I don’t want to risk damaging it by taking the display off the board to see if there’s a part number on the back as I need it for the work I’m doing.The dimensions are about 41.4mm(W) x 24.2mm(H) x 4mm(D).It’s backlit.Although they’re only displaying 16x2 characters, it may be that this is in fact a graphics display. I don’t know for sure either way.Note how few pins there are, so it may be a serial rather than parallel data connection to it. This could be useful as I may be able to use a microcontroller with fewer pins, hence smaller and lower cost.ThanksBrian

author: jm_araujo
author_rank: Regular Contributor
timestamp: April 13, 2018, 01:47:38 pm
content: It looks similar to this one:https://www.displaymodule.com/products/dm-cog1602-703

author: getsmedown
author_rank: Newbie
timestamp: April 13, 2018, 02:50:20 pm
content: Quote from: jm_araujo on April 13, 2018, 01:47:38 pmIt does indeed look like it. Well spotted and thanks for replying to let me know. Much appreciated.Brian
What laser to buy - Page 1
Forum section: electronics / general

author: Jane
author_rank: Frequent Contributor
timestamp: April 12, 2018, 08:33:25 pm
content: Can you recommend a cheap laser machine for cutting rubber? I would like to make a rubber stamps.Thanks

author: Cyberdragon
author_rank: Super Contributor
timestamp: April 13, 2018, 05:00:25 am
content: You have to use special laser cuttable rubber too. It can still smoke and be nasty though. Water cutting is superior for rubber (or other materials that would be burned by a laser). You can make a water cutter out of a standard XY plane and a pressure washer (since it's only rubber, with a fine nozzle it will be enough pressure). You may not even need abrasive if the rubber is soft enough.

author: Ampera
author_rank: Super Contributor
timestamp: April 13, 2018, 06:23:52 am
content: Honestly, unless you have a serious need to make a massive number of stamps, I would stick to tracing and hand cutting. Heck, maybe even a very fine CNC router would be what you need if you want something (in theory) cheap.If you want to get fancy, perhaps you could go for an additive construction method. Flexible 3D printing filaments (no experience, just an idea) might be a cheap solution if you can find a good 3D printer that can use it.
New killer battery in the town? - Page 1
Forum section: electronics / general

author: blueskull
author_rank: Unknown
timestamp: April 14, 2018, 08:17:16 pm
content: Has anyone heard of this new battery: us18650vc7?This seems to be the latest, best 18650 for low drain (<8A) applications. In another words, anything but vape.Has anyone used this one in a design? The numbers are very decent, and the very few actual tests put it to the overall No.1, topping ncr18650ga.Any ideas how good this is? I want to use some in a project.The major concerns I have are that I plan to design my product to have user replaceable calls, so I don't have to ship them as hazardous goods. However, the Sony cell is much harder to source than the universally available Panasonic. Also, since Sony Energy has been bought by Murata, will they limit cells leaking to the wild remains unknown. In other words, will that cell keep being around in the future? I don't have to worry about NCR18650GA, but I have no idea when or if the stock of the Sony cell will deplete.

author: ncoonrod14
author_rank: Contributor
timestamp: April 14, 2018, 09:46:30 pm
content: That is hardly a new cell, been around for a few years now. A cell with very similar performance is the Samsung INR18650-35E. Both great cells for high density packs.
Part-DB: An Open-Source electronic parts database - Page 1
Forum section: electronics / general

author: avrDUDE
author_rank: Newbie
timestamp: April 12, 2018, 06:47:34 pm
content: Hi everybody,I stumbled across a project, that maybe some of you will find interesting: Part-DB (https://github.com/Part-DB/Part-DB) is an open-source (GPLv2) web-based database for you electronic components. So you can track, which and how many parts do you have, where they are located and more...For usage with more than one user, it has an user system and permission system.It can be installed on every web server, which supports PHP and MySQL, and you can access it from every browser.Here you can find an Demo of Part-DB:http://part-db.bplaced.net/part-en/startup.php
What type of temperature sensor is this? - Page 1
Forum section: electronics / general

author: MrOmnos
author_rank: Frequent Contributor
timestamp: April 12, 2018, 04:27:19 pm
content: So, a 3D printer at our school is having issues with hot bed temperature. It is just showing random temperatures. Sometimes it shows 300C but when you touch the board its barely warm. I checked the cables to the temp sensor and they are fine. Also did the continuity test. So, I think the temp sensor needs to checked. I would like to check it with an arduino but I haven't worked such temp sensor before. Looks like some kind of thermo couple. There's also a LM358 on the main board where the temp sensor connects, also a bunch of resistors. So, I assuming it is a resistor bridge and op am set up. But I am not sure. I wanna be sure before I do anything to it because if I break it is gonna take a month to get spare parts and everyone waiting in line to use the printer is gonna get angry. Does anyone know what type is this so I can look up a tutorial and hook it up to my arduino real quick and test it.the thing on the right is the heating element and one on the left is temp sensor.

author: Horusaem
author_rank: Newbie
timestamp: April 12, 2018, 04:33:21 pm
content: Why not google the 3D printer you are currently using to try to get Bill of materials for it ? <--- a Rod

author: sokoloff
author_rank: Super Contributor
timestamp: April 12, 2018, 05:32:56 pm
content: It is most likely a thermistor.Thermocouple would have two different types of wires evident, generally with different color insulation.A "one wire" sensor would probably have 3 wires (though it can work with only two).A thermistor in a resistor bridge is the most likely thing here. Looking at the BOM for the printer (if open source) is obviously the best path.
Help me identify a vintage incandescent bulb? - Page 1
Forum section: electronics / general

author: cvanc
author_rank: Frequent Contributor
timestamp: April 10, 2018, 03:17:16 pm
content: Hi all-So I'm working on a early 1970's era AKG studio reverb. It has this 'somewhat European' indicator lamp in the control box. There are no markings on the bulb and I am not familiar with the shape. The voltage on it should be in the 24-30V range (I think - no schematics - will measure at the socket next time I'm near it)Can any of you possibly suggest what this might be, and ideally tell me where they might still be available for purchase?Many thanks.

author: NiHaoMike
author_rank: Super Contributor
timestamp: April 10, 2018, 03:21:47 pm
content: If it's only used as an indicator, once the bulb burns out, break out the glass and replace it with a LED and resistor.

author: Benta
author_rank: Super Contributor
timestamp: April 10, 2018, 03:33:31 pm
content: It's called BA7S, very common in vintage cars (instrument panel). Never seen 24 V, though, only 6 V and 12 V in different wattages.

author: james_s
author_rank: Super Contributor
timestamp: April 10, 2018, 04:41:14 pm
content: One of my cars uses a bulb like that to illuminate the ambient temperature gauge, it will be easier to find one now that I know what it's called.

author: factory
author_rank: Super Contributor
timestamp: April 10, 2018, 04:53:02 pm
content: I picked up some that look like that one a few weeks ago, not sure what voltage they are, but some of the other lamps I bought with them are 28V (ex-military).David

author: Vtile
author_rank: Super Contributor
timestamp: April 10, 2018, 08:07:17 pm
content: Google a list of light bulb bayonets (there is awfully lot of them) and start the hunt from there, you can find similar bulbs ie. from early 90s T&M equipments (ie. scope reticle illumination), many of them are still in production.

author: calexanian
author_rank: Super Contributor
timestamp: April 11, 2018, 05:55:28 pm
content: 24 volt versions of that bulb were common in diesel trucks and aircraft. Should not be a problem to find. A quick google search turned up many of them.

author: factory
author_rank: Super Contributor
timestamp: April 11, 2018, 07:59:08 pm
content: The lamps I got recently were 12V 2W. I also have a couple of 24V 3W but they are probably overkill for an indicator, I suspect they are intended for truck interior lights, ePay seems to have 24V lamps of this type from 0.6W to 3W, as well as 28V 2.8W and 30V 1.2W.I found these by searching for BA7S & the voltage.David

author: cvanc
author_rank: Frequent Contributor
timestamp: April 11, 2018, 08:01:03 pm
content: Quote from: calexanian on April 11, 2018, 05:55:28 pmYeah, now that I know what they're called I'm finding tons of them. Thanks everybody!
microchip icd4 metal enclosure fail! - Page 1
Forum section: electronics / general

author: RoadRunner
author_rank: Frequent Contributor
timestamp: April 11, 2018, 06:36:06 pm
content: i have ordered microchip mplab icd4 a while back , i just received it. as seen in mike's review video it has a metal enclosure.But problem is mini usb connector is not align with metal enclosure , i am able to plug usb, but a little tight. now i have to hold cable at right angle to make usb functional , i think connector is damaged.
Transformers: revenge of the fallen - Page 1
Forum section: electronics / general

author: Brumby
author_rank: Unknown
timestamp: April 12, 2018, 01:48:16 pm
content: The Tesla S has a new competitor ... with an innovative recharging solution!Design engineer says: "The idea just came out of the blue!"

author: schmitt trigger
author_rank: Super Contributor
timestamp: April 12, 2018, 01:50:03 pm
content: Now, that is what I call an electric car retrofit.

author: madires
author_rank: Super Contributor
timestamp: April 12, 2018, 01:59:50 pm
content: I think that one will need a 3-phase catenary.

author: hussamaldean
author_rank: Unknown
timestamp: April 12, 2018, 03:23:09 pm
content: Quote from: schmitt trigger on April 12, 2018, 01:50:03 pmyeahQuote from: madires on April 12, 2018, 01:59:50 pmindeedthree phase is always better than single phaseQuote from: Brumby on April 12, 2018, 01:48:16 pm

author: Iwanushka
author_rank: Frequent Contributor
timestamp: April 12, 2018, 04:04:28 pm
content: So who is going to start croundfunding for this?

author: GreyWoolfe
author_rank: Unknown
timestamp: April 12, 2018, 08:24:17 pm
content: here is the conversation after this pic was taken:Son; Mom, look what they did to my car!Mom: Don't worry about it, son. We will get a new car out of this.

author: Gyro
author_rank: Super Contributor
timestamp: April 12, 2018, 08:42:59 pm
content: Funny that the tires and suspension don't look that squashed. It must have hit so hard that the middle of the car instantly hit the ground and folded up the ends before they had time to blow.

author: Brumby
author_rank: Unknown
timestamp: April 13, 2018, 02:15:06 am
content: Quote from: Gyro on April 12, 2018, 08:42:59 pmJust how robust do you think the chassisareon those things?I can see the tyres and suspension surviving because they aredesignedto cope with high G transients. The chassis isn't.

author: TerraHertz
author_rank: Super Contributor
timestamp: April 13, 2018, 03:54:20 am
content: Pity the original source (from 2013, according to tineye.com) is gone. I was hoping there's be some 'how it happened' background.I'm betting it's an art installation.
Photonic computers... - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: April 10, 2018, 01:29:53 am
content: I wonder if the day will come when I can have this in my home...I wonder how fast a dedicated photonic bitcoin miner would be. Whoever generates the first dedicated photonic SHA-256 algorithm engine will screw all the ASIC miners in speed and even more so on power consumption by leaps and bounds.

author: ejeffrey
author_rank: Super Contributor
timestamp: April 10, 2018, 03:35:58 am
content: Photonic computer will never ever replace transistors.There are a ton of technical challenges to make photonic computers that are anything like general purpose -- constructing gates is hard, constructing registers/memory is hard, attenuation is high, and integrating sources (LEDs or lasers) is hard. Most photonic stuff is actually pretty slow.But the insurmountable problem is that photons are just too big. Intel is having a ton of trouble moving from their 14 nm process to a 10 nm process. They have a 7 nm process on their roadmap. The wavelength of 405 nm light in silicon is 120 nm, while in SiO2 it is 270 nm. So it just won't be possible to reach the same level of integration as silicon chips already do -- the photonic structures are just going to be too big.Photonic processing is interesting for applications like optical networking switches if you can avoid the transition from optical -> electronic -> back. An CPU replacing a modern Intel/AMD is crazy talk.A lot of the stuff they talk about with "rethinking the way computer work" and making them parallel, pipelined, and so on are all things that we could be doing (or are doing) with silicon processors but it is actually really hard to program for and only useuful in certain applications -- particularly when you have very little data dependence.

author: raptor1956
author_rank: Frequent Contributor
timestamp: April 11, 2018, 02:22:00 am
content: Optical communications will become more important and some day dominant for computer networks and even peripheral communications but optical processors -- not so much. In order to make it work and do so economically you'd need to have standardized connectors with fiber-optics that fit the task and are small enough to connect even small components. And, those connectors and cables will need to be cheap enough and that's pretty hard at this point.Come up with a connector that integrates power and ground wires with one or more optical fibers that are small and cheap and we're off to the races. Building a standard around it for component interconnection that specifies permissible noise limits on the power lines so that component makers know what level of power conditioning they need in there components to stay within those limits and the comm protocols is a tough ask but sooner or later optical comm will dominate even at the component interconnect level.Brian
How do you determine Peak Hours and non peak Hours in power distribution? - Page 1
Forum section: electronics / general

author: MrOmnos
author_rank: Frequent Contributor
timestamp: April 10, 2018, 03:09:02 pm
content: There is only one utility company here in my country which sells electricity to the consumers. But there are several private energy producers. These produces sell their electricity to the state owned company (SOC) and it then sells it to consumers. The buying rate per Unit is defined by the SOC. There are cases where non governmental entities are allowed to sell directly to the consumers but these are mostly micro hydros powering isolated villages.So, here the peak hours are defined by the (SOC). It is a time interval in a day where they presume the demand will peak. This interval remains the same until they decide to make changes to it. Changes are made once in six months or even a year or two. They buy electricity at higher rates in this time interval from the producers.But in reality the peak hours don't start at the same time every day. They do it this way because I assume they don't have the technology.How do they do it in your country? I mean there are probably several utility company selling and buying. Who determines the rates and how and where does all the power measurement take place?

author: NiHaoMike
author_rank: Super Contributor
timestamp: April 11, 2018, 12:50:22 am
content: Ohmconnect uses dynamic peaks. No idea how it works behind the scenes.
mobile apps from component distributors - Page 1
Forum section: electronics / general

author: owiecc
author_rank: Frequent Contributor
timestamp: April 10, 2018, 07:53:02 pm
content: Are there any good apps you use in your electronics work? I only know of Mouser's app. You can scan the bag's barcode to get component info. Do other distributors have similar apps? Is there "one app to rule them all" (be able to handle Digikey, RS, Mouser, Farnell, TME, ...)? Ideally I'd like to point the phone to any component bag and get a datasheet without additional clicking.
... - Page 1
Forum section: electronics / general

author: cleaningOut
author_rank: Contributor
timestamp: April 10, 2018, 06:58:26 pm
content: ...

author: rstofer
author_rank: Super Contributor
timestamp: April 10, 2018, 07:41:20 pm
content: And then Facebook goes public and even secretaries are suddenly multi-millionaires.

author: bsudbrink
author_rank: Frequent Contributor
timestamp: April 10, 2018, 08:11:32 pm
content: If it's any consolation to you, several of the most insufferable ones I encountered back in my heyday went completely nuts and the money they made is now being used to care for them.

author: bsudbrink
author_rank: Frequent Contributor
timestamp: April 11, 2018, 01:18:28 am
content: More or less, yes.

author: gregariz
author_rank: Frequent Contributor
timestamp: April 11, 2018, 05:32:50 am
content: Quote from: cleaningOut on April 10, 2018, 06:58:26 pmWell there used to be a website fuckedcompany.com that they had to take down that said most of it.Trouble these days is tech is mostly on the decline in the Valley and most other places and the ideas are mostly shit - so you end up with pricks whose sole purpose in life is to suck startup money and then leave a mess. Even some of the VC's have been leaving town. If that is happening you know things are not good. Commodity tech has killed hardware mostly, and software is not faring much better. I would go so far as to say you are better off in Austin.
Anybody used Target 3001 for front panel design - Page 1
Forum section: electronics / general

author: chris_leyson
author_rank: Super Contributor
timestamp: April 08, 2018, 08:40:53 pm
content: Just got the free version of Tagret 3001 through Beta Layout (PCBPool) to design some front and rear aluminium panels. Found it very intuitive and easy to use. Panel thickness 1mm to 4mm in plain or anodized aluminium with different colors available. Really easy to add holes, threaded, countersunk, counterbore, fixing studs and even milled out areas. Injet printed, 300 dpi, and UV cured text and logos are really easy to add.Anybody used this before and what is the print quality like ?
Milwaukee cordless  "Sodding" Iron AvE - Page 1
Forum section: electronics / general

author: mtdoc
author_rank: Super Contributor
timestamp: April 08, 2018, 07:15:44 pm
content: Thanks for posting this. Gotta love Ave - precision PCB vise and all. Too bad he didn't get a chance to test its performance.I've got lots of M12 tools and batteries around - so it would be nice to find a high performance cordless replacement for my Radio Shack butane iron. Price is a bit steep though...

author: Cerebus
author_rank: Super Contributor
timestamp: April 08, 2018, 08:04:03 pm
content: Quote from: mtdoc on April 08, 2018, 07:15:44 pmSurely in the AvE world that's a RadioShockbutane iron.
Waytronic Voice IC - Page 1
Forum section: electronics / general

author: memo.online
author_rank: Newbie
timestamp: April 13, 2018, 02:49:16 am
content: Hi all, wondering if anybody has or knows where I can find any data files on Waytronics, WT2000Bo4, and relative scematics, I have had some advice that it maybe a PcbLib2 file, I am trying to achieve a very thin record and playback, with a SD card for memory expansion.thanks mike
Another PCB fab bites the dust - Page 1
Forum section: electronics / general

author: chris_leyson
author_rank: Super Contributor
timestamp: April 07, 2018, 01:37:14 pm
content: Swift Circuits in Llanelli South Wales went into administration last week. Last time I used them was 20 years ago.

author: Bassman59
author_rank: Super Contributor
timestamp: April 08, 2018, 03:59:31 am
content: Quote from: chris_leyson on April 07, 2018, 01:37:14 pmPretty much every week I see a Facebook post saying that some New York City business (record store, clothing store, restaurant, bar, whatever) is closing. The post has a bunch of comments along the line of, “I loved that place when I used to go there 20 years ago!”And yeah, maybe it wouldn’t have closed if you’d bothered to patronize the place more recently than 20 years ago ...