hybridfree/eevblog-posts huggingface dataset:
Cardboard & Electronics as Toys for kids - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: January 22, 2018, 05:57:58 am
content: console manufacturer nintendo started the use of cardboard with electronics as a consumer product.what do you think of this? so if the cardboard is fortified with resin will add longevity.nintendo video

author: basinstreetdesign
author_rank: Frequent Contributor
timestamp: January 22, 2018, 06:33:54 am
content: This is a stroke of genius for those kids who like to do some making and know they will use it a few times then abandon it or hack it into something else. It also demonstrates to this group that they could design/build/hack an entirely new or different gizmo using what they may already have - cardboard. And since this group is a growing market I bet it will be a winner for Nintendo.The video shows that it is a flexible low cost scheme and that many things are possible with low-cost electronics and punch-out cardboard so it can also be a high-margin winner.It will fail miserably in the case of kids who want to just take it out of the box and use it long term (up to a year). But those kids will buy one of these kits only once.

author: Muttley Snickers
author_rank: Unknown
timestamp: January 22, 2018, 06:38:11 am
content: About thirty odd years ago to help supplement my regular income a mate got me a night shift job in a supermarket stacking shelves, the work was easy and the job paid really well but after a few days the skin on my arms was inflamed and extremely painful, turned out I was having an allergic reaction to the adhesives used in the cardboard boxes.The store manager stated that he had occasionally seen this type of reaction from staff members before but was not aware of a cure or work around, anyway I couldn't continue so I had to pack it in and it was pretty much the only thing I was ever allergic to, parents of children using these products should be made aware just in case.

author: Zero999
author_rank: Super Contributor
timestamp: January 22, 2018, 09:45:30 am
content: Quote from: Muttley Snickers on January 22, 2018, 06:38:11 amThat might not be a problem nowadays. They might have changed the adhesive since then.

author: Muttley Snickers
author_rank: Unknown
timestamp: January 22, 2018, 09:57:33 am
content: Quote from: Hero999 on January 22, 2018, 09:45:30 amYeah well, by the same token it could also be even more toxic nowadays than it ever was, mind you stacking the supermarket shelves required almost full time handling of the boxes which was not a normal or regular activity for me up until that experience.

author: jonovid
author_rank: Super Contributor
timestamp: January 22, 2018, 10:07:39 am
content: Quote from: Muttley Snickers on January 22, 2018, 09:57:33 amas for the nintendo kit , personally I would be more concerned about radioactive contamination then toxic ink's or diy's.depending on where in japan the cardboard came from.https://www.sciencedirect.com/science/article/pii/S0265931X00001910
Changes to "Recent posts" formatting - Page 1
Forum section: electronics / general

author: digsys
author_rank: Unknown
timestamp: January 22, 2018, 05:33:13 am
content: Kudos for changing the "Field lengths" on the "Recent posts" page. Now, a lot more posts fit per page, and it makes it more readable. ThanksI had actually started an excel exercise last year to offer pretty much the new format, I can throw that away now :-)The two "extra" suggestions I had included - Shorten "Projects, Designs, and Technical Stuff", to "Other Equipment & Products" width,and left justify the "Topic" column. Otherwise +1Edit: Well, that was odd !! It's gone back to the original layout ?? Guess it was just a glitch .. oh well.
USB 3 device poor connection in USB 2 host - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 21, 2018, 01:00:18 am
content: USB 3 is supposed to be backwards compatible with USB 2, but I found that the USB 2 ports on the Raspberry Pi 3 will not make a reliable connection to some USB 3 devices like the D-link DWA-182 802.11ac adapter. I found that pulling the plug slightly out improved the connection, so it looks like the root cause is the USB 2 socket pins are making contact right on the edge of the USB 2 pins in the USB 3 plug.Is that due to the socket being out of spec, the plug being out of spec, both, or an oversight in the specifications?

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 21, 2018, 02:51:32 am
content: The Pi in question has been modified specifically to fix the USB power issue - bypass the current limiter, add some capacitance right at the ports, and supply power with a good PSU. With the mod, even 2.5" hard drives work.I know for sure it's a connection issue since I can make it stop working by applying pressure at certain angles. Anyways, the workaround I'm using now is a short USB extension that is able to make a good connection.

author: Halcyon
author_rank: Unknown
timestamp: January 21, 2018, 09:35:41 pm
content: I've had the same issue on some HP Z-series workstations. Not much that can be done apart from perhaps using a decent USB hub. This is also the reason why I keep a cache of USB 2 and 3 flash drives and storage devices on-hand.
Micro current gold - Page 1
Forum section: electronics / general

author: hedley
author_rank: Contributor
timestamp: January 19, 2018, 04:40:47 am
content: I eagerly connected up my new ucurrent. Config rigol bench supply on 5v . A 2k2 resistor in series with the ucurrent and back to bench supply. The ucurrent switched on and range switch on mV/mA.Measured mV output of ucurrent with fluke 87 V and it is unstable ie moving around and incorrect . I expected to see 2.27 mV but it jumps around 4.5 mV .Any feedback as to wether this product is any good .

author: hedley
author_rank: Contributor
timestamp: January 20, 2018, 11:26:59 am
content: All working as advertised . I was holding meter probes with finger touching which causes disturbance at ucurrent levels . As soon as I wired to connector posts it worked superbly .

author: Electro Fan
author_rank: Super Contributor
timestamp: January 21, 2018, 09:02:30 pm
content: Where did you get the micro current gold? Thx
Kickstarter for charity - electronic school donations? - Page 1
Forum section: electronics / general

author: ez24
author_rank: Super Contributor
timestamp: January 22, 2018, 07:10:26 am
content: HiIs there a type of Kickstarter for a charity? I would like to come up with a way to fund electronic school supplies to a third world country. I am thinking about either Peru or Kenya.I would like a way to fund them electronic hardware for a school environment for both the students and school.I support Kiva but this is for loans that are re-paid. Not the same.Thanks
Anyone used raytec Magic Gel to pot electronics? - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 20, 2018, 04:58:13 pm
content: Looks like a good option for potting for waterproofing electronics , allowing possible re-entry, and not too expensive - anyone tried it ?Looks like they're promoting it more for electrical uses - filling junction boxes etc.http://www.raytech.it/product/low-voltage/magic-gel?lang=en

author: Ampera
author_rank: Super Contributor
timestamp: January 20, 2018, 11:57:43 pm
content: Yeaah, a guy named Ray tried to give me some magic gel once. It didn't end well and I don't like talking about it.It does look like a neat gel, but of course could only be used inside an enclosure, and even though it has a low viscosity, it does appear to not turn into a gelatin or solid from what I can see. To me that means while it's nice to take it out, perhaps it would be a nightmare to clean out of stuff it's not supposed to be in? Another wonder if it does flow and how fast in it's cured form.

author: janekm
author_rank: Unknown
timestamp: January 21, 2018, 02:08:49 am
content: Quote from: mikeselectricstuff on January 20, 2018, 04:58:13 pmI've used it on a research project putting wireless GPS trackers on wild horses in Spain. We used it both for the water-proofing aspect but also to give some degree of shock-proofing (the design had some wired and soldered components including the battery connection). The devices held up well despite getting knocked into trees by the horses trying to get rid of them, and I don't believe we had any moisture issues with any of the devices that we collected at the end.The working time can be a bit short when you're filling a lot of devices at once (we tried batches of around 20, which was a bit much), and any spillage will leave a very slippery residue on the floor that is exceedingly difficult to clean up (seems to be silicone based). Probably best to put down a tarp first.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 21, 2018, 09:24:49 am
content: Quote from: blueskull on January 21, 2018, 02:15:27 amBecause it's easy to buy in small quantities and appears to have some good attributes.QuoteSo they probably have it manufactured by someone else - so what?

author: ChunkyPastaSauce
author_rank: Unknown
timestamp: January 21, 2018, 09:44:16 am
content: It's silicone resin

author: Gyro
author_rank: Super Contributor
timestamp: January 21, 2018, 11:15:16 am
content: Interesting name and box graphics, it makes it look like something you would have given the kids to play with on the kitchen table.Actually, Magic Gel is what they used to rub their skin to numb it before injections (and therefore what I ask for before a Cystoscopy, but that's another story!).
octopart / findchips - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: January 21, 2018, 09:00:27 pm
content: I thought I'd upload my project BOM and see just what find chips made of it. Well it didn't want to make anything of it having failed to read the excel file it claimed to be capable of reading and me having to upload a csv file it then demanded $49 a month. This seemed a bit ridiculous considering half the links don't work like contacting them or requesting an extension to the trial i never used because it was seriously buggy back then - what a joke.then I remembered octopart and thought I'd see what that does. to my surprise it actually took the bom and priced it up for me without even needing an account. Pretty neat, at the press of a button i get full costing and warnings on availability etc.Has anyone used any of these tools? are they actually any good? ultimately if I make 100 of something I'd just sub it out and assume the subcontractor is doing something like this.
DIY Programmer - MX29LV160TMC-90 - Page 1
Forum section: electronics / general

author: OCBSlimz
author_rank: Contributor
timestamp: January 16, 2018, 03:58:10 pm
content: I'm looking to build a programmer to burn MX29LV160TMC-90 EEPROMS, i begrudge paying excessive amounts on a programmer (just for one chip) expecially whilst i already own a TL866A and a RT809H which don't support this device.Any one built one of these already? Any way i can mod my existing programmers to accept this device?KRMatt

author: technix
author_rank: Super Contributor
timestamp: January 16, 2018, 06:24:44 pm
content: Quote from: OCBSlimz on January 16, 2018, 03:58:10 pmFor me I just uses my STM32F103ZE/STM32F407ZG/STM32F417ZG kits to program those. Using the FSMC NOR mode it is just a quick memcpy().

author: OCBSlimz
author_rank: Contributor
timestamp: January 16, 2018, 11:48:27 pm
content: I found what i was looking forhttps://www.eevblog.com/forum/blog/eevblog-411-minipro-tl866-universal-programmer-review/msg1402094/#msg1402094User : Skum has created an adapter for this. Good work,Please close
How could the EGG Power Station be implementing the plug rotation feature? - Page 1
Forum section: electronics / general

author: eecook
author_rank: Regular Contributor
timestamp: January 16, 2018, 03:10:38 am
content: Hi All,A friend of mine showed me this product on youtube (see below). What cached my attention is the how you can flip the plug in 90 degrees and you still get a working voltage. It's gotta be very simple and clever circuit, I just can figure out what it is. Any ideas?Something that bugs me is, how would a thing like that ever goes through safety compliance if they are inviting you to leave the earth lead disconnected.Cheers,Simon.

author: IanB
author_rank: Super Contributor
timestamp: January 16, 2018, 03:19:55 am
content: Quote from: eecook on January 16, 2018, 03:10:38 amThat's easy. Every pair of adjacent holes has opposite polarity.QuoteThat's harder to answer. I don't know that one.

author: eecook
author_rank: Regular Contributor
timestamp: January 16, 2018, 03:50:17 am
content: Quote from: IanB on January 16, 2018, 03:19:55 amYes! Thanx! Damn lateral thinking.

author: Gromitt
author_rank: Regular Contributor
timestamp: January 16, 2018, 07:46:23 am
content: Quote from: eecook on January 16, 2018, 03:10:38 amBecause the plugs you use in that does not have any earth, they are Euro-plugs not Schuko./stefan
History of the Transistor Documentary... - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: January 15, 2018, 08:49:11 am
content: History of the Transistor Documentary...This one is technical about the difficulties in getting the damn thing operate. Enjoy...

author: dryjoints
author_rank: Regular Contributor
timestamp: January 15, 2018, 02:53:52 pm
content: Thank you so much, this looks wonderful

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: January 16, 2018, 03:43:06 am
content: Tektronix 545 in the background? Approved.
Hypervision display wall, or something - Page 1
Forum section: electronics / general

author: Jeroen3
author_rank: Super Contributor
timestamp: January 15, 2018, 07:26:04 pm
content: I made a 350mm (13.7") wide circular rotating thing at an internship with 180x64 (interlaced) RGB pixels rotating at 15 Hz which looked awesome.But this, this looks incredible. And quite difficult to engineer.
32-level grayscale on an e-ink display - Page 1
Forum section: electronics / general

author: amyk
author_rank: Super Contributor
timestamp: January 14, 2018, 04:07:42 am
content: https://hackaday.io/project/11537-nekocal-an-e-ink-calendar/log/72153-can-you-get-32-level-grayscale-out-of-an-e-ink-displayThat came out of a Kindle which drives it with a controller that can only do 16 levels. I'm not aware of any existing products that do more, but you can make your own controller and it isn't all that different from PWM'ing LEDs, except the timescale is many orders of magnitude longer.

author: Gribo
author_rank: Frequent Contributor
timestamp: January 15, 2018, 02:26:59 pm
content: Dithering the image is much easier than this.And, as the author said, it is not really a stable solution since he ignores temperature.
Plexiglass cut online? - Page 1
Forum section: electronics / general

author: firstcolle
author_rank: Regular Contributor
timestamp: January 15, 2018, 08:41:19 am
content: Do you know any online service that offers low cost plexyglass cut?thanks

author: tszaboo
author_rank: Super Contributor
timestamp: January 15, 2018, 09:16:57 am
content: https://www.elecrow.com/5pcs-acrylic-laser-cutting-service.html300x300 mm maxI havent used it yet, only their PCB service.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 15, 2018, 09:17:33 am
content: Quote from: firstcolle on January 15, 2018, 08:41:19 amThis is something that you'd need to look for locally due to shipping cost. Try local signmaking shops

author: Jeroen3
author_rank: Super Contributor
timestamp: January 15, 2018, 09:27:20 am
content: Smartprototyping and iTead offer this iirc.

author: Marco
author_rank: Super Contributor
timestamp: January 15, 2018, 09:30:18 am
content: Quote from: firstcolle on January 15, 2018, 08:41:19 amNo, butGoogledoes.

author: pix3l
author_rank: Regular Contributor
timestamp: January 15, 2018, 09:34:28 am
content: We've used the elecrow service, works great :-)

author: firstcolle
author_rank: Regular Contributor
timestamp: January 15, 2018, 11:14:01 am
content: thanks for your suggestions.obviously, I searched on google but I want ear your experiences
Mobile site - Page 1
Forum section: electronics / general

author: donkey77
author_rank: Regular Contributor
timestamp: March 12, 2017, 10:34:44 pm
content: I'm sure I'm being an idiot but could someone point me to where you change from the desktop to the mobile version of the forum please (not tapatalk) I dropped my phone and must have clicked a desktop link whilst trying to catch it. I thought there used to be a mobile link at the bottom of the page but I'm buggered if I can see it?! Many thanks.

author: donkey77
author_rank: Regular Contributor
timestamp: March 13, 2017, 11:56:41 am
content: Don't worry, found the small text in blue at the bottom of the page, couldn't see it against the background.

author: markb82
author_rank: Regular Contributor
timestamp: January 18, 2018, 04:42:02 am
content: That blue text was very nearly invisible on my smartphone. Thanks for the hint to look at the bottom.
Probably not the most cost effective way of getting components for projects - Page 1
Forum section: electronics / general

author: Red Squirrel
author_rank: Super Contributor
timestamp: January 13, 2018, 09:30:04 pm
content: Someone did an oopsies there. Not only did they try to reflow the solder but looks like the components flowed to the table.

author: TerraHertz
author_rank: Super Contributor
timestamp: January 13, 2018, 11:02:00 pm
content: Even the hinge fell off. That board is unhinged.

author: GreyWoolfe
author_rank: Unknown
timestamp: January 13, 2018, 11:57:26 pm
content: Quote from: TerraHertz on January 13, 2018, 11:02:00 pmI lost mine years ago.

author: amyk
author_rank: Super Contributor
timestamp: January 14, 2018, 04:09:50 am
content: Looks like most of the other BGAs and SMDs stayed, but the main GPU along with a bunch of TH parts came off. I'd expect TH parts to be less likely to drop off, but I guess there's a size/weight/pins ratio difference?

author: janekm
author_rank: Unknown
timestamp: January 14, 2018, 09:56:02 am
content: Quote from: amyk on January 14, 2018, 04:09:50 amYes indeed. It's fairly common practice to put PCBs through reflow a second time with lower-weight components flipped to the bottom while soldering the top-mounted components. Works fine for light components like decoupling capacitors (hence why you will often see boards with only light-weight components on the back).
HTP Invertig 221 TIG Welder (o-scoped in action)  - Page 1
Forum section: electronics / general

author: Cliff Matthews
author_rank: Unknown
timestamp: January 18, 2018, 05:25:12 pm
content: FWIW, since the forum's not related to welding, I thought I'd share 2 short video's here (from a favorite channel of mine, not on the big list).

author: ogden
author_rank: Super Contributor
timestamp: January 19, 2018, 11:31:58 pm
content: Quote from: Cliff Matthews on January 18, 2018, 05:25:12 pmWhat result you expect by posting those videos?- It is obvious that his 65Ampprobeis clipping. It is unlikely that welder outputs positive "flat as table" pulse and negative which seems more like real world waveform. IN addition to that - scope screen shows amplitude as 680mV which is 68Amps peak, more than probe can handle.

author: Cliff Matthews
author_rank: Unknown
timestamp: January 20, 2018, 12:58:16 am
content: Inchat, one shouldn't always expect replies, sometimes it's just sharing things within our tech genre. You'd be surprised how many are here who can use a welder but have never heard of "This Old Tony's" channel even though it's right up there with Dave. BTW, I've been sharing YT channel's on the blog for a while

author: ogden
author_rank: Super Contributor
timestamp: January 20, 2018, 01:02:47 am
content: Quote from: Cliff Matthews on January 20, 2018, 12:58:16 amI did MIG welding which went surprisingly goodWhatever... Did Old Tony resolved his issue with current measurements? I am not going to contact him on youtube or any other media

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2018, 01:07:27 am
content: Quote from: ogden on January 20, 2018, 01:02:47 amYes, he learnt something about measurements and showed it in the 2nd video.

author: Cliff Matthews
author_rank: Unknown
timestamp: January 20, 2018, 01:18:05 am
content: Yup, it was sorted-out in posts made by his YT followers. Like Dave, he's "real" and man enough to laugh it off and admit when he's hit a wall.Good presenter's learn that people can detect a "know-it-all" on theirwithin just a few minutes. Honesty still works I guess..
Why was my Jackie Mason topic removed? - Page 1
Forum section: electronics / general

author: dryjoints
author_rank: Regular Contributor
timestamp: January 13, 2018, 04:40:09 am
content: Why was my Jackie Mason topic removed - Someone got all hyper-sentitive?It's not as if I was offensive, or said ANYTHING remotely rude or provocative.Weird. Oh well.

author: Halcyon
author_rank: Unknown
timestamp: January 13, 2018, 04:54:45 am
content: Such is life on an internet forum. You won't have necessarily done anything "wrong" to have your topic removed. Dave likes to keep it electronics related as much as possible.

author: dryjoints
author_rank: Regular Contributor
timestamp: January 13, 2018, 05:02:40 am
content: Quote from: Halcyon on January 13, 2018, 04:54:45 amSure, makes sense.

author: Bud
author_rank: Super Contributor
timestamp: January 13, 2018, 05:05:29 am
content: There was another post magically disapeared in Thermal thread this afternoon, so could be a technical glitch.

author: EEVblog
author_rank: Unknown
timestamp: January 13, 2018, 11:19:59 am
content: Quote from: dryjoints on January 13, 2018, 04:40:09 amI deleted it.If I let one person post a youtube video about their favourite off-topic *insert whatever* then I have to let everyone do that, and people will see all these new threads with off-topic titles and start their own and the forum will quickly spiral down into an off-topic abyss.So we try to keep this forum as on-topic as possible.We don't mind if threads stray off-topic, that happens, but deliberate off-topic posting about your favourite thing in new threads will likely get deleted.And before anyone asks "why not have a separate off-topic section were people can post whatever they want, what's the harm?" There is a lot of potential harm and it's been explained many times before why.

author: dryjoints
author_rank: Regular Contributor
timestamp: January 13, 2018, 03:21:21 pm
content: Quote from: EEVblog on January 13, 2018, 11:19:59 amThat's fine, I understand. Ain't you meant to be on holiday? Off with you, shoo!!
Training a cockatiel to announce the EEVblog video intro? :P - Page 1
Forum section: electronics / general

author: dryjoints
author_rank: Regular Contributor
timestamp: January 12, 2018, 01:32:23 am
content: It has been noted that Dave has a rather high vocal register, which I have become used to over the years, and now it's just normal. I was thinking earlier, and this is not a dig at you, Dave, nor your voice, this is mere fun, because I think your voice is nice - and if I mocked it, I would be mocking your creator... and that's not cool.Right, so I think maybe... an EEVblog lab cockatiel/parrot, that you could train to emit your intros/phrases (preferably the non-coarse ones!) would be fun - what do you reckon? You could have him chirp out the"Hiii, welcome to Mailbaaaaag"and edit it into an intro! A higher register would probably be easier to emulate by a bird, no?I think it would be fun, and bring a new thread of fun and laughter to EEVblog videos.

author: dryjoints
author_rank: Regular Contributor
timestamp: January 12, 2018, 02:32:19 am
content: Dave, I see you're reading this, I hope I've not offended you.

author: Ampera
author_rank: Super Contributor
timestamp: January 12, 2018, 04:27:37 am
content: This is a bit of a far out suggestion. I wouldn't worry about offending Dave that much as he is a cool guy, and cool guys don't get offended over small stuff like this.The big glaring issue I see, however, is that birds are high maintenance pets. They live forever, require a lot of attention, and for those not used to them can be really annoying. You would likely end up hearing it in more than just intros. It is considered by a decent amount of people to be a form of animal abuse to get these birds for the sole purpose of them being interesting toys to play around with instead of an actual pet to care for. I'm not saying your intent is abusive, I'm just saying it's not practical.

author: hermit
author_rank: Frequent Contributor
timestamp: January 12, 2018, 04:45:38 am
content: A lot of effort and would anybody notice the difference? Just saying.....
2018 International Consumer Electronics Show Experiences Blackout - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: January 11, 2018, 04:25:37 pm
content: CES 2018 experiences blackouthttps://macsources.com/ces-2018-day-2-experiences-power-outage/

author: fourtytwo42
author_rank: Super Contributor
timestamp: January 11, 2018, 04:26:49 pm
content: Quote from: jonovid on January 11, 2018, 04:25:37 pmBloatware again

author: jonovid
author_rank: Super Contributor
timestamp: January 11, 2018, 04:42:39 pm
content: they introduced the concept of no power

author: georges80
author_rank: Frequent Contributor
timestamp: January 11, 2018, 05:57:12 pm
content: Was at that center yesterday, left to move to the Sands convention center literally minutes before the blackout occurred which meant at least we got onto the shuttle bus line and boarded as things went dark. I'd hate to imagine the lines of people 10 mins after we leftCES is a sea of people with with convention halls filled with some neat things and a lot of 'just stuff'...It certainly was very wet Tues with roads flooding over as Vegas road drains were overwhelmed. So I can imagine water getting into things that it shouldn't havecheers,george.

author: dryjoints
author_rank: Regular Contributor
timestamp: January 12, 2018, 03:05:44 am
content: That must have been an utter relief to the visitors. What a crock it is, schmucks.
how can i increase Av gain of BJT from 10 to 12 with AC signal of 10Mv and 1KHz - Page 1
Forum section: electronics / general

author: nyame
author_rank: Regular Contributor
timestamp: January 12, 2018, 02:24:19 pm
content: with the following components, RB 1=15K, RB 2=2.2K, RC =10K, RE =830 ohms,AC signal the 10 Mv, 1KHz, Vcc 12the gain for the present circuit is Av is 12, how can the Av gain be reduced to 10 ?

author: basinstreetdesign
author_rank: Frequent Contributor
timestamp: January 13, 2018, 03:35:12 am
content: Your title says "how can i increase..." then you say "how can gain be reduced..."Since the gain of the current circuit is 12, I will assume you want to decrease the gain to 10.Do this by adjusting the load impedance on the collector of the BJT. If you want to keep all current components the same so as not to alter the BJTs operating point, then one way to do it is to add a resistor of 50K from the right side of the right 1uf cap to ground. This will change the AC load on the collector down to 8.3K.BTW: This would have been better posted in the beginner section.

author: Zero999
author_rank: Super Contributor
timestamp: January 13, 2018, 08:34:15 pm
content: Quote from: nyame on January 12, 2018, 02:24:19 pmThe gain is roughly equal to RC/RE, so changing REto 1k, would make the gain 10.By the way, please remove the white space and kindly refrain from posting overly large schematics. It took a couple of minutes using Paint to change the resistor value and get the schematic down tot a sensible size.
Spam Being Sent Through The EEVBlog Forum - Page 1
Forum section: electronics / general

author: JoeN
author_rank: Frequent Contributor
timestamp: January 10, 2018, 07:21:22 am
content: Just got this about 5 minutes ago in my personal email, sent by the board I think. Looks like someone set up an account to spam board members. I expect others will see this soon.Quote from: qfeng48@gmail.com on January 10, 2018, 07:14:56 am

author: abraxa
author_rank: Frequent Contributor
timestamp: January 10, 2018, 01:01:36 pm
content: Yeah, I received such a PM a while ago as well. Different user and different content, though.

author: hermit
author_rank: Frequent Contributor
timestamp: January 10, 2018, 03:01:33 pm
content: It doesn't show a user in my case so how do you know different user?@gnif@eevblog@simon

author: Zero999
author_rank: Super Contributor
timestamp: January 10, 2018, 03:05:53 pm
content: Yes, it happens, but I've not received any for awhile. When I did receive one, I forwarded it on to Dave and Simon and the perpetrator was banned.

author: hermit
author_rank: Frequent Contributor
timestamp: January 10, 2018, 03:40:28 pm
content: I was going to do that but there was no 'forward' button on the email and the fact that no user name showed up I thought it might be better to chime in here. They can just look at my inbox with all in tact to do the forensics.

author: Bud
author_rank: Super Contributor
timestamp: January 10, 2018, 04:06:12 pm
content: Quote from: JoeN on January 10, 2018, 07:21:22 amHave you checked your actual personal box On the Forum site to make sure it came from the board and was not crafted?

author: Vtile
author_rank: Super Contributor
timestamp: January 10, 2018, 05:16:02 pm
content: Yep got one also.. From:QuoteJessica were the signature.

author: Simon
author_rank: Unknown
timestamp: January 10, 2018, 06:48:25 pm
content: I banned someone (10 hours ago) can someone confirm the username? please also check your settings regarding emails and if you allow people to email you.

author: hermit
author_rank: Frequent Contributor
timestamp: January 10, 2018, 06:59:18 pm
content: qfeng48 splat gmail sot comI was getting email redacted but just noticed it does show up as the user name also in the listing. I'd overlooked that. Don't use the messaging system often.It came through via email because mine is set up to notify me for personal messages.

author: Simon
author_rank: Unknown
timestamp: January 10, 2018, 07:12:03 pm
content: Well the sender should show up either on the email or in your PM's. I bannedf someone this morning sending messages like that.

author: nuno
author_rank: Frequent Contributor
timestamp: January 11, 2018, 01:43:45 pm
content: Also got it, user doesn't seem to be banned:https://www.eevblog.com/forum/profile/?u=163488
500,000 Countdown - Page 1
Forum section: electronics / general

author: Undweeber
author_rank: Regular Contributor
timestamp: January 11, 2018, 10:42:24 pm
content: https://socialblade.com/youtube/user/eevblog/realtimeless than 500 to go

author: dryjoints
author_rank: Regular Contributor
timestamp: January 12, 2018, 02:31:06 am
content: I was just thinking that the other day

author: riyadh144
author_rank: Unknown
timestamp: January 12, 2018, 02:49:13 am
content: Congrats to Dave, his channel is one of the few no BS, channels on youtube. He values quality over number of subscribers, which is why I greatly respect him.
Fairchild RC2211A: How to use the formula for FM detection - Page 1
Forum section: electronics / general

author: richard1991
author_rank: Contributor
timestamp: January 10, 2018, 02:05:20 pm
content: Hi. Can someone please help by verifying I understand how to use a formula? Thanks.The formula is in this data sheet:http://www.littlediode.com/datasheets/pdf/Datasheets-RC2/RC2211A.PDFOn page 9 under "Linear FM detection".VOUT= R1VR/ 100 R0Volts/% deviation.Let's say that the FM carrier signal was at 1 Mhz and the maximum frequency deviation for the system was set at 5Khz (i.e. fc1Mhz and the deviation+/-5Khz (10Khz frequency swing). Say also the max modulating frequency for the system was set as 5Khz. That would mean if we, in practice, used a modulating signal of 5Khz, the modulation index would 5Khz/5khz = 1. Also, we would have 100% modulation.Mostly, I'm not sure about the last part of the formula (Volts/% deviation). RichP.S. Is the acual formula this?: VOUT= R1VR/ 100 R0And the last bit telling us something about the answer?

author: richard1991
author_rank: Contributor
timestamp: January 10, 2018, 02:25:59 pm
content: I think the text is saying that the result is volts per unit of deviation. So, if the deviation were to be 100% you would multiply the anwer by 100.

author: floobydust
author_rank: Super Contributor
timestamp: January 11, 2018, 09:28:29 am
content: Look at the ExarXR2211A datasheet, same equation but with proper formatting, pg. 18

author: richard1991
author_rank: Contributor
timestamp: January 11, 2018, 10:44:32 am
content: Thanks for the heads up on the much better document produced by Exar.The formula then is this: VOUT= R1VREF____________100 R0The ouput being output voltage change per unit of FM deviation.
Have you seen this? Nice video  "Spectacular Drone Footage Of A TV Tower Repair" - Page 1
Forum section: electronics / general

author: dryjoints
author_rank: Regular Contributor
timestamp: January 11, 2018, 05:25:28 am
content: Another one... MAD!

author: EEVblog
author_rank: Unknown
timestamp: January 11, 2018, 05:44:08 am
content: Would suck if you forgot your side cutters...

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 11, 2018, 05:51:32 am
content: Quote from: EEVblog on January 11, 2018, 05:44:08 amAsk someone to tie a pair to a drone and fly them to you!

author: Bud
author_rank: Super Contributor
timestamp: January 11, 2018, 06:03:22 am
content: What exactly was repaired ?

author: Richard Crowley
author_rank: Super Contributor
timestamp: January 11, 2018, 06:47:22 am
content: Quote from: Bud on January 11, 2018, 06:03:22 amThe most common reason for climbing towers used to be replacing the flashing red beacon lights (required by the aviation authorities).But the incandescent (or flash-tube) emitters are widely being replaced with LED for the obvious reasons of much longer useful life and reliability, etc.There is also the matter of repairing ice damage to the antenna structures, but that is probably not what is the reason for those fair-weather videos.

author: Whales
author_rank: Super Contributor
timestamp: January 11, 2018, 07:00:02 am
content: Absolutely beautiful.Quote from: NiHaoMike on January 11, 2018, 05:51:32 amYou'd be a cut above.

author: BravoV
author_rank: Super Contributor
timestamp: January 11, 2018, 07:05:35 am
content: Quote from: EEVblog on January 11, 2018, 05:44:08 amAs old saying, real man has a "gut" ... and "teeth" for a reason ...
Can anyone identify this connector ? - Page 1
Forum section: electronics / general

author: artag
author_rank: Super Contributor
timestamp: January 11, 2018, 06:52:08 am
content: Here's a puzzle for you :https://coolcomponents.co.uk/blogs/news/can-we-help-russ?utm_source=Newsletter+List&utm_campaign=4229c24ec5-EMAIL_CAMPAIGN_2017_10_31&utm_medium=email&utm_term=0_6b382bce70-4229c24ec5-408719029&mc_cid=4229c24ec5&mc_eid=001b8b1f63http://www.russelldawkinsbackontrack.co.uk/frustrating/The pic certainly looks a lot like a fisher (fischer ?) with that half-circle polariser, but they say not. However, the ODU ones I can find look much more like Lemos.
Where would i get the firmware for this android netbook - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 09, 2018, 01:34:33 am
content: https://www.ebay.com/itm/1088A-Android-4-4-Notebook-10-1-Laptop-WSVGA-WM8880-1GB-8GB-WIFI-Camera-NEW/152690143487?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649i have the same netbook as in that listingits stuck at the boot logo i heard this can be a problem sometimes with these netbooks and you need to reinstall the android firmware to it by copying the firmware files to an sd card and inserting it into the netbook and then powering it on it will boot off the sd card and install androidbut i can seem to find the firmware doing a google search

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 09, 2018, 05:39:09 am
content: been looking for 3hrs now driving me crazy hope seller gets back to me soon

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 11, 2018, 02:21:20 am
content: here is what happens when i boot the laptopthat is all i get and it never boots did some google searching yesterday for like 5hrs and came across a site it was not in English but i used google to translate it and a guy with the same netbook was able to install the firmwear for a table pc that uses the same cpu screen rez ect and it worked fine for him but i followed the instruction putting the folder on the root of the sd card and it should boot off the sd card when netbook is turned on and start installing android but even when i do that i just get what is shown in the video

author: wraper
author_rank: Unknown
timestamp: January 11, 2018, 02:55:58 am
content: Seems this could be ithttps://www.gearbest.com/blog/download/rom-firmware-pack-for-1088-400http://www.androidsoldier.com/2014/03/wondermedia-wm8880-421-tablet-pc.htmlhttp://androidholic.tk/wondermedia-tablet-wm8880-firmware/

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 11, 2018, 03:31:04 am
content: Quote from: wraper on January 11, 2018, 02:55:58 amthanks going to try that now

author: sony mavica
author_rank: Frequent Contributor
timestamp: January 11, 2018, 03:55:33 am
content: Quote from: wraper on January 11, 2018, 02:55:58 amthank you so so so much man its now installing the firmware been looking for it for 5hrs today and about 6hrs yesterday you have saved my netbook from just being a paperweight
121GW Multimeter: Odd LCD Behaviour - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: January 10, 2018, 02:03:55 am
content: I noticed something strange, when I swiped my hand over the LCD, random segments would light up momentarily, even though the unit was switched off. It persisted like this for several hours. Static build-up making it through the clear plastic casing onto the LCD segments?

author: wraper
author_rank: Unknown
timestamp: January 10, 2018, 02:10:59 am
content: Quote from: Halcyon on January 10, 2018, 02:03:55 amApparently, I think I've seen this on some devices.QuoteI assume it does not happen if switched on.

author: lowimpedance
author_rank: Super Contributor
timestamp: January 10, 2018, 02:18:00 am
content: Just tried with mine, which still has the screen protector on, and no segments showed. As for yours do these 'illuminated' segments disappear immediately you turn the meter on ?.Anyway it would be static build up in the plastic screen. I have seen this behaviour as well with bare LCD screens.

author: gnavigator1007
author_rank: Unknown
timestamp: January 10, 2018, 02:18:41 am
content: I noticed this peeling off the screen protector. Didn't persist long, but I could do it over and over again.

author: Muttley Snickers
author_rank: Unknown
timestamp: January 10, 2018, 02:19:03 am
content: So that we don't end up with a multitude of similar threads you might want to post this issue in the dedicated 121GW thread located in the Test Equipment section.https://www.eevblog.com/forum/testgear/eevblog-121gw-multimeter-issues/

author: tablatronix
author_rank: Regular Contributor
timestamp: January 10, 2018, 02:30:57 am
content: I see this all the time, very normal, some kind if static charge. Always goes away.I install devices with lcd and plastic protectors alot.

author: Halcyon
author_rank: Unknown
timestamp: January 10, 2018, 03:26:00 am
content: Thanks guys, yes, it started immediately after peeling off the plastic protector. The effect only lasted for a few hours until it appears the charge dissipated. I wouldn't exactly call it an "issue", just a temporary quirk. The first time I thought I just imagined it.

author: Ampera
author_rank: Super Contributor
timestamp: January 10, 2018, 04:04:02 am
content: You're gonna have to tell me how good it is so I can get jealous enough to maybe buy one when they go public.

author: Ampera
author_rank: Super Contributor
timestamp: January 10, 2018, 05:36:38 am
content: Sadly I have occasional use for a multimeter, but I expect that to change in the coming years, so perhaps a bit of an investment to help a creator I love so much would be worth it for me.I also am like Dave and can't resist touching buttons and twiddling knobs, and multimeters tend to have the best knobs and buttons available.

author: nidlaX
author_rank: Frequent Contributor
timestamp: January 10, 2018, 08:40:51 am
content: Didn't Dave demonstrate this effect in his recent LCD design video?

author: xygor
author_rank: Regular Contributor
timestamp: January 10, 2018, 10:27:20 am
content: Drop its temperature to -40. Then what does it display?
Biometrics and Access to Food by Poor in India - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: January 10, 2018, 03:32:25 am
content: I keep hearing these stories about poor people in India who first had all their money declared worthless if they could not convert it in time, and now this "Aadhaar" biometrics scheme. People now are starving to death both because Aadhaar did not work, and because of outright theft of other people's resources.This is from a report by an NGO called "Right to Food Campaign" about a chain of deaths of the poorest people - such as 67 year old widow Etwariya Devi who starved to death recently because the system was broken.“Dealers have started tampering with digital records in order to hide accumulated stocks. One way they do this is to separate authentication and distribution – get people’s fingerprints and/or tell them that they would get rations later, and then play hide-and-seek. As per the online records, ration was allotted to the dealer for October-December. But the dealer did not distribute ration to many cardholders claiming that he did not have adequate ration stock. These irregularities show that the introduction of Aadhaar-based biometric authentication has failed to curb leakages in the PDS. In fact, it has created new barriers to the access of rations,”This is an example of how technology should NEVER be used.
reverse polarity cap - Page 1
Forum section: electronics / general

author: grifftech
author_rank: Frequent Contributor
timestamp: January 09, 2018, 10:50:04 pm
content: so I applied about 15 volts reverse polarity to a 16 volt cap, it has not bulged, but it has lost about half of its capacity, can it be saved?

author: ogden
author_rank: Super Contributor
timestamp: January 09, 2018, 11:00:52 pm
content: Quote from: grifftech on January 09, 2018, 10:50:04 pmMost likely not. You cannot rely on it anyway. Just replace it
Inkjet Printed Thermite  - Page 1
Forum section: electronics / general

author: BravoV
author_rank: Super Contributor
timestamp: January 09, 2018, 08:12:31 am
content: After watching this, the 1st thing pop out in my mind is about tight controlled spot metal joining/welding or even soldering maybe ?https://youtu.be/8QNQRhBstRg

author: IanMacdonald
author_rank: Frequent Contributor
timestamp: January 09, 2018, 09:30:17 am
content: Would possibly have applications for self destruct in military electronics like IFF boxes. Instead of blowing up the whole unit, more selectively destroy the chips containing the data, with less operator hazard.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 09, 2018, 09:55:55 am
content: Of course once you have the thermite slurry you could just screen print it.Struggling to think of applications for this - maybe a lower-end substitute for exploding bolts?

author: BravoV
author_rank: Super Contributor
timestamp: January 09, 2018, 11:29:25 am
content: Apart from destructive uses like above example, here another one, print close to a spark gap, and if an enough energy and arcing happened across the gap, it will ignite the "ink" and instantly acts as a welder to weld to metal surfaces.Sort of automatic sealing two metal joints, say for security purpose as the thermite burning temperature can meld metals.Problem is not sure where or what situation needs this.
Online Magazine Archive - Recommendation - Page 1
Forum section: electronics / general

author: JustSquareEnough
author_rank: Unknown
timestamp: January 09, 2018, 09:53:02 pm
content: I'm thinking about subscribing to one of the older magazines for access to their back articles and more importantly their projects. I learn best by looking at practical implementations, building them and taking measurements as i read through the description of how the circuit works.looks like best choices are nuts&volts, silicon chip, elektor.I know I'm asking for it here, but which would you say has the best projects / project explanations, historically. or is it a coin toss and i should just pick one and try....
Like a kid on Christmas morning! - Page 1
Forum section: electronics / general

author: made2hack
author_rank: Frequent Contributor
timestamp: January 10, 2018, 12:41:10 pm
content: Or a very belated boxing day, or very early new years "tool" purchase!

author: cvanc
author_rank: Frequent Contributor
timestamp: January 10, 2018, 02:49:01 pm
content: Nice!It surprises me just how frequently I reach for calipers when I'm working in the shop. An indispensable tool.

author: SeanB
author_rank: Super Contributor
timestamp: January 10, 2018, 08:38:14 pm
content: I have at least 4 sets of those vernier calipers, including the one I got for free, size is "fits most", seeing as it opens up to over 600mm, though I most often use the small 150mm ones.

author: Terry01
author_rank: Frequent Contributor
timestamp: January 10, 2018, 08:54:44 pm
content: I got myself 1 just before Christmas too. Just a cheap one, £20 odds I think it was! It's amazing how much I use it now I have 1. Handy wee tool!

author: Ampera
author_rank: Super Contributor
timestamp: January 11, 2018, 12:56:14 am
content: I need to get some new batteries for my cheapie Aldi electric calipers. Now that I'm designing stuff with 3D printing, I am finding I need them more than ever, normally having to make do with a couple of rulers as either measuring tools or straight edges.

author: made2hack
author_rank: Frequent Contributor
timestamp: January 11, 2018, 08:37:41 am
content: Well, for the last 4 years or so, I've been using a regular vernier caliper with resolution of 0.1mm (but I couldn't really be sure of its precision).So when I saw my Mitutoyo distributor had the digimatic on sale for 84 Euros, I jumped at the chance to scoop it up and have a "reference" caliper.
silly suggestion - kick start the Solar Boomerang - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: January 07, 2018, 12:00:46 pm
content: Solar Roadways LOL a silly suggestion that got a kick start ... So my silly suggestion iswhy not have the Aussie solar Boomeranginvent aussie solar boomerangs, its a toy, its fun , it beeps so you can find it in the aussie bush. or the beach.its solar so that's so progressive so green. solar boomerangs will sell welldo not forget to add blinking LED's to it. tip: its a boomerang shaped pcb with mico embedded in epoxy resin.aerodynamic shape optimization is very important here, so it will fly.if you're clever you will not need a battery, as a super-cap will do , also do not forget to add boomerang buoyancy, can help at the beach.foam packing inside the epoxy skin. see how are surfboards made ?,so why not have your own eco solar flying thing- seriously People will buy this stuff, its fun.I posted this in response tomore solar roadways LOL

author: Red Squirrel
author_rank: Super Contributor
timestamp: January 09, 2018, 01:39:02 am
content: Add a magnetic coil too, so if it lands on a solar road way, it can help charge it!

author: Ampera
author_rank: Super Contributor
timestamp: January 09, 2018, 02:55:43 am
content: Solar foot/soccer ball! It plays the game for you!

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 09, 2018, 04:33:25 am
content: And add a reasonably fast ARM CPU so it can mine Realbucks. (If you don't get it, no exchange has accepted Realbucks for well over a year so those coins are worthless.)

author: IanMacdonald
author_rank: Frequent Contributor
timestamp: January 09, 2018, 09:37:59 am
content: Definitely a market for a magnet motor here. A perpetually hovering solar boomerang.The solar bit being nonfunctional but just to appeal to the greenies.