EEVblog #1110 - Mailbag

hi welcome to day one's favorite segment my old bag let's get straight into it shall we this one's from M button micro button M button thank you very much it's come from Aaron affair local post office here in straw Lea no worries I am shooting this live by the way you can go to eevblog too and you'll be able to see the recording of this mailbag live it's the first one I shot live I just wanted to show that you know it's real you know I do actually open these things that they peek beforehand I don't know what's inside these things this is a serious bit of kit whatever it is it's an instrument of some kind holy crap Warren or needs to be repaired cow call Steve about it okay oh cool Steve about it stays the man old school Sony DVD recorder Wow it's out of two minutes hair down or is that a lie cuz I do lots of Sony tear downs Sony makes so much stuff and they've always made like good quality stuff like not only consumer but you know prosumer and industrial and industry specific stuff and things like that and yeah this is one of these you know they would have used these in the studios and stuff like that found this son recorder in a storage unit I was cleaning out for audio-visual company thought it can make for a good unboxing repair video it's apparently Foley I've not powered up the unit myself uh-huh this is actually a medical device recorder it's the Sony dvo 1000 MD for medical device and it's specifically you'll find these in our hospitals and surgeries and stuff like that when they're doing an operation like say an arthroscopic a thing like I had my ACL replaced in my knee and you can find the surgery complete surgery video for that on eevblog to have to leak that in if you haven't seen it if you're a fan of surgery videos go for and they record them with stuff like this you'll find this on the trolley that has you know the arthroscope and the drills and everything and they stick the fiber-optic camera in you and the video comes out and they can record them directly to DVD so that they can give it to their patient like you know for the morbid ones like myself who requests the video of their surgery and they plug the video straight in or it's got a DA firewire DV interface or you know old-school s-video interface and it just records it directly to DVD no pain in the ass PC it's just all self-contained professional bitty kit that just works this is exactly what you'd expect to find inside of course you wouldn't they Sony not gonna roll their own DVD drive so they you know just using off-the-shelf RPC interface DVD Drive no worries about that but look they've rolled their own hardware down in there that all looks very professional it's just a 2-minute teardown I won't go into any great detail there but it's obviously not a PC it's a dedicated bit of kit specifically for just doing this purpose and Sony make it as you've seen in a ton of my sony are videos and like tear down videos of various specialist bits of industry kit they own the market for these sorts of things but I will go deeper because there is a hard drive down in there as well I do like maybe I could be wrong maybe it is just an Intel processor like a running in the box but I you know it's going to be more polished than that I mean it is obviously you know it's like there's no outward appearance of running any sort of you know user accessible operating system alright it's paradise it's got a Japanese power supply boy there you go welcome so it works like as in it boots so does it take away yeah I might take a while to boot up so you know it could be running some sort of you know it's obviously running some some sort of embedded operating system because there's got a capture the video and what no disk oh yeah well seems to be doing the business anyway hmm supposed to be folding alright there's something wrong with the drive on here it's not it's not ejecting so there you go I mean it's got an ejection override from my elsewhere in the system even the thing a button on the front doesn't which is normally hidden by the plastic down here doesn't work so yeah I don't they have those emergency pin holes or something to open them hmm you'll also notice the rubber vibration mounts on there nice well this is really superbly designed and they got this so look at this RFI shielding on the front ah absolutely beautiful and then the hard drive cylinder slides out fantastic I'll tell you what is that a temperature sensor that's that's fantastic well I'm absolutely impressed by this this is just a real professional bit of kit as you'd expect and look at that huge pin count quad flat-pack doesn't bring a tear to the eye big ARM processor their Fujitsu it obviously got some sort of expansion here maybe memory expansion or something like that got our memory down here but yeah it's obviously just running you know probably a an embedded version of Linux or some other embedded OS I don't know what Sony would typically run but of course this is exactly what you'd expect from a bit of Sony professional industry kid this is not designed for the consumer it would have been high-priced spared no expense Sony you'll get Sony branded on all the chips up here of course Sony have a massive portfolio of their own chips I can call and so they've got like video input ADCs DACs video input and output and amplifiers and all that sort of jazz that they work in there and this is just it's just beautiful I don't know how much these things cost but yeah they're definitely worth it they probably own the market for you know medical video recorders and if you think that the operating system is stored on that hard drive and I got the hard drive disconnected and it's booting just finds oh there we go era 95 to 110 it probably means there's no hard drive they obviously using the hard drive to store the because obviously like the real-time video you wouldn't be right into the DVD in real time so stores on there and presumably once you're you know over with the surgery you know probably get in there and menu and just go right or something like that and you know Bob's your uncle finally got it just gave it a bit of a why could he do and we're in like Flynn will it open again oh yeah there we go just a bit stuck maybe that was the problem maybe there's nothing wrong with it all right there we go oh no oh it wouldn't surprise me if this thing still works and the only problem was this Dickey drive on it and yep the video works there it is just standard dark composite out via that B and C and Bob's your uncle so I'd I've probably I'm 99% sure that the input works they probably just as I said couldn't get this damn thing working it's just I've got the knack of it now I've got the Dilbert knack and yeah video outputs working they're probably records fine you know maybe there's something wrong with the DVD drive apart from that I don't know something but there you go wiener that's a nice bit of kit thank you very much max was sitting in that it's always interesting to look inside very specific industry bits of equipment like that as you can see inside there you know really spared no expense in the design or manufacturer or you know like user interface of this is exactly what you want it's beautiful I don't want my German viewers yes a Deutsche Post um thank you very much andreas hundra Asst Bergman in brackets at Daniel Aubrey okay from hazel hassle hazel in Germany kind of sort of rings a bell another huge item maybe the notes inside please do not expose you've got to have the name though expose your address it looks like the crazy fussy bloke check it out I swear that looks like the crazy flus he's like that's gonna be a thing now people gotta stop selling to the crazy lucky bloke I love my old bag the unseen note anyway oh I got a t-shirt this is for Davy Jones thank you oh cool yeah Wow like that one DeLorean time machine Judy thank you very much that's a winner by the way if you're gonna send t-shirts small or medium maximum it's a small nice some stickers for info material the Tor project are those tor fanboys defect soldering iron no idea what that is funny money see a sticker because that's all you have to do to make it CA compliant it's just whack that on no worries she'll be right and original holographic freedom and online privacy over the Tor project alright so they send a whole bunch of so I can hand out pamphlets Wow go down to my local shopping center and hand out pamphlets oh we've got a little fall banger no no it's not it's that say that's one of those pin card you know the thingamabobs yeah for online banking or whatnot cheese a little stuff in here we have chocolate Swiss chocolate coming from Germany we've got a kit man is just a ton of stuff this is this is getting ridiculous this is for David Leger awesome I'll give that today sorry hates being called Dave David whereas I hate being called David I want to be called Dave huh safe so I do cool as I love these this is like a secure thing I'm gonna have to do some research on that first one of these are secure cards and obviously they got you know the could the keys are inside there and they've got some mum and they're no doubt gonna have some sort of protection on that like a razor protection like if you open the thing it it erases the peas and the TI fanboys go wild ah and inspire casts a lot of people rave about this thing but gr that keyboard is just oh God oh the humanity oh oh ah they try to cram everything in it's just aa victorinox swiss card I've always wanted one other victorinox swiss cards thank you very much brilliant it's a lot thicker than I thought it was UV mark up I don't have a UV marker portable solar e98 8 watts yeah it'll do some SMD stuff I'm sure this is insane this is a bonanza more Swiss chocolate that looks nice Alex primo power grid expansion Australia Indian subcontinent Rio Grande games what power grid and energetic economic game for 2 to 6 players only money with electric power has anyone played this company is I doe from Zurich and it's the safe seal there you go date code 1989 something like that but the chips are like 86 86 87 I think yeah 87 dated Wow so 80606 anyway this is some sort of security card oh there were no details with it I've got there it is it's the seek head I can't find any info are readily available on this thing it's got a D 15 on it and it obviously contains it's some form of security board and it contains some sort of secure like encryption keys or something like that and it tells you in case of open or damaged the security cover or dad deleted or destroyed automatically so yeah it looks like it's just got this two-part plastic shield on it which looks like it's glued together so he may be able to snap that off or in worst case Dremel it open but anyway it's an IPC is a bus card maybe it was like some form of our software protection perhaps although that's very extreme for that sort of thing but it's maybe it had to do with you know some sort of you know financial services industry specific card or something like that that's stored secure keys because cryptography isn't like it is these days you know back then in sort of like the mid to late 80s I meant so you know like online banking all that stuff just simply wasn't possible anyway we're interested in what is in here and presumably just some memory chips probably got a backup battery in there probably backup battery SRAM that when you appeal that when you open this up it automatically deletes them or you know something like that so I'm concern with that let's crack it open it doesn't feel potted it feels which you know if you put it in with potting compound inside there becomes a big monolithic brick you know you can dip the entire board into like a big you know mold of which then you peel off you know and then it would have been ridiculously are secure but anyway let's say our protection they got inside here let's start by doing the obvious getting a screwdriver at night no I think that's a shot well and good might require the Dremel get under the backside here yeah we can cuz we don't care about bugger and the tracks or anything like that but yeah yeah I think it's just going to be easy just a dremel it oh yeah yeah I can see some of the protection around the edge look at that there you go we're in there already you can see look that that metal so obviously we're broken it and oops well the secret keys are falling out oh well and there we have it we're in like Flynn and this is basically what you expect inside any sort of our physical security envelope like this which I've done tear downs of like you know pin pads point-of-sale terminals and stuff like that and where the Sakura keys are kept they often encase them in like so in this case it's one big metal loop you can see it loop back like that and it just goes back and back and back and right around and obviously there's one on the top and one on the bottom there there you go that's just a big continuity thing which you know could be as simple as inline power with the expected I was gonna say the internal battery but there is no internal battery so is that the external battery that powers it I would have expected that to be underneath anyway um okay alright I thought that was you know maybe there's something for like a real time clock but no that's obviously storing the secure keys and they are Gonski and they've rubbed the numbers off look at the bastards they've rub those off at the oompa-loompa factory and it's the seek head EP and looks like we've got you know some so that's a Western Digital up there Western Digital coil so it could be some sort of you know Western digital processor or whatnot and then just all seven four you know series logic and stuff like that but that's where the secure keys are kept inside are they inside the ROM and that'll be laying wouldn't it take all the security of no they've got to be with insider these are probably battery backed SRAM here like six to six fours or you know six to one sixes or something like that so yeah that's it well if anyone has any idea what this was actually used for this old school is a card with a D 15 and some sort you know they went to a lot of trouble to just store presumably just store some secure keys because it's really interfacing type stuff here it doesn't really do any processing what there's feeling processing probably done in there but yeah it's not exactly yeah huge and grunty is it hmm there you go just I reckon it's just battery back this Ram and you break that and that's all she wrote oh what's that hi Dave H well done slipping that one under ah beautiful and if you're wondering how they were getting contact up to the those loops on the front and back little pogo pins top and bottom neat oh I like that no winner if you don't understand that educate yourself this do-it-yourself thing 365 nanometers that puts it in the ultraviolet it's a little button on the bottom and it's an ultraviolet lead with a single transistor driver okay this is absolutely hilarious friedemann friese is it power grid Rio Grande games like what what this is hilarious check this out an energetic economic game for 2 to 6 players earning money with electric power earning lots of money with electric pen are a very good idea should I use coal or oil to generate power in the old fashion or will there be a shortage of those resources in the future oh we got some Chinglish happening will there be a future in burning garbage certainly nuclear power is very exciting as long as the government will manage the nuclear waste there will be a lot of profit of course you can use more economically friendly power and be independent of resources but when such power plants be powerful enough for the customers of the future naturally you must watch your competitors to see what plans they build which cities they having their note resources they depend on this is absolutely hilarious I Rio Grande games oh the USA Friedemann Friese is the author Wow Solaris it's made in Germany ah let's do an unboxing of power grid the board game beautifully of this ah come on we've got power we've got the guide I've got the user guide oh it's pretty comprehensive in it so you goes through different phases phase one determined playing order phase two auction power plants phase three buying resources phase four is building facts 5 is bureaucracy this is great hours of fun for the whole family [Laughter] ok that's off winning the game the game ends immediately after phase 4 when at least one player has at least 17 cities in his network it's only four boys no player can buy more resources of power plants at this time the winner is the player who can supply electricity to the most cities in his network with the power plants or resources he has there is a tie the player with the most remaining money wins you love games yeah so was most widely-read board game magazine does anyone subscribe to that um I don't know but oh he's that oh look at this oK we've got all our wooden pieces these are out like it was brown like coal or whatever it's black no black could be coal power plant in his out he's helped whoa magnificent oh it's double sided double sided for twice the fun ah this this is hideously complicating complicated Wow alright it's a Bobby doesn't but it gets better cuz we have the Australian and Indian subcontinent expansion pack ah fantastic let's have a look at this well yeah Alex likes Trier it's Western Australia over there and there you go okay so go straight on one side there you go it's Sydney over what it's it's upside down it's upside down like it it's upside down there's the map of Tassie yeah it's upside down to read the stuff there it is to read the actual names you have to put it upside down Wollongong Sydney Canberra dub oh right up to Cairns and Darwin and vertices at the top Tasmania for the win but let's not forget the Indian subcontinent look at this right all my viewers in India and elsewhere on the subcontinent of course what else do we get in the box ah listen - well this one a buckaroo there you go five buckaroos and fifty buckaroos it's not gonna buy you much terms of a power plant you're gonna buy your energy and there's your turn cards this is this is terrific and what's in here we have plastic bags okay thanks so that is power grid the board game does anyone know if this was successful or not has anyone ever played it I'm gonna have to take it over maybe say you know like it maybe won't operate in the power plants missus eevblog might get all excited power grid is it was it like one of these like started as a great idea and then sort of like flopped or turned into a you know not so terrific idea who knows it may play very well you don't know unless you play it it may be you know so compelling that you just can't put it away anyway can you still buy power grid the board game let know in the comments especially if you've ever seen it in the shops or ever played it or was it like a sort of a one-off I seems old like Kickstarter wasn't around back then so it's yeah good on him well it turns out this is actually a thing and apparently it's not a bad game it even has its own wiki pedia page which I'll have to link in down below and apparently it's still like played at gaming events and stuff like that and apparently it it you know it is a decent game to play it makes you want to come back and we might even have the tenth doesn't say the tenth anniversary but apparently there was a 10th anniversary edition it came out in the early 2000s and the 10th anniversary has the wooden pieces which we've got so awesome power grid the board game beautiful we have a kit and my Germans a bit rusty so I don't really know what it does but as a battery a micro and a buzzer neat and there's a schematic um Bueller Bueller you've got to be me a USB soldering iron 3.5 millimeter Fano jack on it oh I am just not going to insult anyone by powering this thing up like seriously really eight what fixed temperature I like the hair is this a thing well I guess you know if you're absolutely desperate zero to 450 you Wiener ain't got that wrong but sounded good okay what okay that's the protective cap all right and it's like no just just no no no what is that the temperature adjust why does this thing exist no no go away can't believe this seems like a legit thing like it's it's not like two dollars delivered on eBay presumably what I No Oh check it out it is one of these super thin that is credit-card thin got ourselves a chippy on the back and um an access card to rub the number off some sort of secure access card with a tiny LCD that's a no battery what the what okay oh hey hello can't Oh dizzy button desperate Carty guests Bert I don't know what that means but isn't that cool wow that's a little dot matrix LCD that's incredible Wow excellent anyway I've turned down the world's thinnest calculator this is a similar sort of thing it's just amazing how they can get dot matrix LCD in there like that that's incredible it's got I was some stupidly thin battery in it so I don't know what the no battery is check this out my finger on the bottom wow that's funky it's incredible they make it that thin this is a ti-nspire Cass plus and this keyboard I was just coming into my live the audience that yeah I can picture the design review meeting for this and how this might have been a good idea at the time but it's just I I just knew just know it just feels wrong Oh anyway we got ourselves a joystick but the most interesting thing I just noticed this check it out prototype not for sale property of Texas Instruments how many of these are out there this is awesome it's booting it's booting check it out apparently this is 2006 vintage where did I find that there you go she's taking its fat time to load you wouldn't want to be desperately any calculation would you go now a glass what it's still booting after its life whoa okay oh that ain't in English ah soul of the show I have no idea how you'd even use this menu Wow no oh this is like me mentioned trying to use this as an everyday use calc rather stick a hot soldering iron in my eye so I had a look for this and sure enough on the data math website they have like the sort of like a history of like the prototypes of these things and apparently they you know existed because this is like people got their hands on it this is actually from a 2006 and for those playing along at home it's got 3000 I'm shirking a PV T one point 1 and then s Oh 906 so they think that up to maybe a thousand of these things may have been like our prototypes may have been made and then sent around the world for evaluation ooh look and yeah this is one of the prototypes cool it looks like a bought one anyway apparently they release this in finally released in 2007 with some minor changes or something but some of the early prototype units but it looks like what you've got to do you've got this cursor which like goes around the screen and then you're going to go up there and like a zoom that's the calculator and then I click it are we inside the calculator now like like I have no idea why would anyone use this as a calculator I know they designed us like it you know school learning aids and things like that but for an everyday use Kepler why even bother having sine cos and tan on here and square and log and like as separate keys why even bother it's obviously not going to be a functional everyday use calc I mean I'd like where's the exponent key oh damn I found it there it is there's your exponent key ah gotta be me who designed this Stevie Wonder so let's crack open this prototype unit see what's inside now this is interesting remove and replace batteries one column at a time so I assume that they've got both of these in parallel both like two triple a's in series and then both of those columns in parallel so that you don't lose your memory contents presumably when you change it over or maybe like the RTC like maybe it doesn't have a coin cell battery in it let's find out don't mind the way that they've done the battery contacts in there they've got that spring there and there and that makes contacts with the pads down here that's in those Springs are just for that sliding door they've implemented that well pretty happy with that so yep look separately fused look yes separate paths for each one there so they're obviously as I said diode or in those in so that when you place one string it it keeps the thing powered up so have we lost everything I don't know anyway there you go got one little job down here all the all the processing it's got to be under here somewhere I doubt it's that I can't see that on the screen yet you can probably read in 4k but I can't on my camcorder screen and we've just got the hot bar attachment going over to the LCD driver board here I got a chip on Flex driver there with another hot bar attachment on the piece of be more hot bar attachments up here it's a lot of functionality that goes into this thing there's our mini B USB up there keyboard board I won't worry about but I will just take out this processor board so that's the top off maybe it's the bottom side whichever way you want to look at there is essentially no top side or bottom side of a PCB it's really how you want to reference it so to speak so let's flip that up and tada we're in like Flynn we go there's a processor what does that some sort of TI job and we've got ourselves that's our flash memory down there that must be our working memory and more memory down there is it I can't read it it's on the camcorder screen looks like we've got to flash memories this st-1 here this big job and the smaller one down here one of them's that one's probably holding the program flash memory or vice versa so I wanted to be holding the operating system or the program for the calculator the other would be the working memory and we've got that looks like SRAM and a TI OMAP processor in here so I'm not sure how this differs from the final final production unit but this is a 2006 prototype anyway it probably doesn't differ a lot because it doesn't look hugely it looks basically the same on the outside there's probably like just may or may be some minor hardware tweaks and some software are tweaks as well of course go check it out on the back of the case here we've got a little reset switch there but there's another hole up here if you have a look that we've got the reset pad over here that must yep that's got a corresponding the rubber conductive rubber mat on there but this one goes into a little it's not a tactile switch it's like a little lever type switch and I'm just wondering is that there in the production unit because it's unlabeled so it's like a secret squirrel access switch but is it there is it only on the prototype unit I don't know and confirm yep only works with our batteries on one side and I don't know I'm sure this thing has lots of fanboys but I just find it a ted-like you know I don't even have to try and extensively to use it to know this is going to be a tedious turd on a daily basis and to users like a calculator it makes a fine graphic learning calculator for teaching and all that sort of jazz but I don't know why the screen is crap like that maybe that's a better battery battery I don't have the battery right but like do I like maybe you can shortcut to things like but it like I'm gonna scroll around a cursor or whatever like this is just ridiculous like no anyway thank you very much for sending in that prototype unit it's not like that's the first we've had a prototype of the ti-nspire cast plus if you use this thing let us know down below I don't want my Turkish viewers thank you very much huzzah Cara BAE from Istanbul Turkey fantastic never been to Turkey a couple of things in here little doodad box oh I saw a knob and by the way this is what happens we this is a small size shirt and this one's yeah quite tight some are just really tight so yeah there's smaller media if you want to be safe medium shirt that's what they're right what are we going it's a ah that looks like is it one of those like power supply they're doing at our supply do it yourself I'm like soldering iron things they're like little tubes or something on it thank you alright this looks really good I'm a JVC controller because they're you know not cheap irons JB see even the iron itself is not particularly cheap but the controller is not you know is probably then ladies the most expensive part of the thing anyway this one can work between nine and twenty five volts your recommends twenty four volts you know you could use it on batteries and stuff like that ease and has a low power or a power limit option really nice so parallel can heat from room temp the 300c in two seconds so it's available here if you want one let's check it out thank you very much as I write so let's take a look it's rather neat I like it push button there nice rotary encoder feels nice that's just a nice case I would have liked to have seen the supply voltage written on here yeah that's I think that's an oversight but anyway I've got my GBC iron here it just it plugs in yep that's the legit connector for but looks of it nice okay let's turn this on I've only got it hooked up to a 24 volt 6 ampere capable source but that's that's got to be plenty ok so here we go switch it on well it's upside-down oh there you go drew 2 points something else didn't see that I wasn't watching let's turn it on again all right anyway set to 300 see that's nice 1 degree increments that's quite a sexy little load display there it's very readable like the fonts everything else so I like that it has the target there and it looks like we have a little power bar graph nice ok let's test the temperature accuracy 300 C don't know there's a calibration thing but oh yeah that's good enough for Estrella no worries okay let's do the old wet sponge test at 300 C so we're basically just adding a little heatsink on to it and let's give it a go let's give it a go how quickly does it recover and does it overshoot doesn't overshoot it doesn't recover particularly quickly you can see that the bar graphs going Oh full ball up there it's really dropping down and my current meter my power supply is only doing like 1 amp or something like that on each channel so it's not maxing out so but I think it's as good as the real JBC but it's doing a reasonable job ok let's do a ground plane test at 270 like I've done in the previous review videos we'll give that a bell and come on you could allow the flux to activate on that cuz it's a bit ah it's sticking a bit it's not as good as the real JBC seventy yes I have checked the temperature is bang-on to 70 but it's not far off it's certainly better than say the pace 80s 200 that's for sure so that's not too shabby and my power supply is only drawing like half an amp peak so it's not really a drama yeah this isn't bad at all so if you turn this up to 300 it should eat through that and it does so yeah they're nice and of course it'll perform even better at a higher temperature I mean that's a winner from performance point of view no worries and inside I must say I'm suitably impressed look at this we've got a laser cut acrylic sort of like front plate that everything mounts and screws on hots not attention to detail holding the pins in place for the rotary encoder that's very nice didn't have to go to that effort but certainly appreciate it heat shrinking on there the controller board I don't know is this open-source I don't know I'll have to check it out but that looks nice mounted on a plastic plate I really like that although that then slides in there although I just would have made the board physically bigger so it slides in so you don't have to you know not the additional BOM cost and the screws and everything else of doing that but that is Oh double-sided load there we go that looks like a nice design in construction heat shrink up in there as well that's a winner well done huzzah and it's not dumb it knows the irons unplugged nice and the temperature unit Celsius or degrees what about initial temperature sleep periods that power limit mode and the tip type it supports the JBC and also the hakko t12 as well I'd probably reckon you know what depends on which one is that you know the cheapest to get in your country but the hakko t12 of course used on the FX nine five one and it's a perfectly are fine direct heat tip so that that is well implemented I'm very happy about that always on and up to four hours standby hi to all my Belarusian viewers from Belarus Belarusian thank you very vag some yet kovitch I've got that one wrong thank you very much PCB oh it's a it's a lid lamp controller does this a homemade is this a do-it-yourself project yep you see dev dot are you by Dave this is a UV LED panel with timer supply voltage 12 volts DC can be used in home manufacturer PCBs nice for photoresist exposure and solder mask drawing yeah I've got some my UV curable solder mask I'm here I don't think I've done a video on it but yeah you can make your own you know solder my especially like for repairing piece of bees and stuff like that you put it on and then you hit it with a UV lamp thank you so don't actually have that got like a UV torch but it's really piece week so yet some of come up with this some I what I think is quite a novel idea I like the implementation of the array of UV LEDs here of course for exposing piece to be you want like even exposure over the whole board so you'd put you know if you did larger boards you'd presumably have a couple of these spacing from the PCB I don't know where that'd be a some experimentation required and it's powered from 12 volts and got a em simple timer on the back here so if we you know just pair it up and then we can set now what more can switch it on there we go number seconds so unfortunately it does seem to have a problem where it like that's just like a start/stop kind of thing which is maybe ok if you want to like check on your board I guess that's a feature actually so I suppose we have to reset it like that or can we have just held it down anyway seconds geez could do with them oh no no it does have ah city control just talking a wild hippo took a while to kick in there there we go so it jumps up to four oh no we're now jumping up in ten steps okay anyway you just press that switches on and there's our UV nice um I could measure the wavelength of it I like it's going to be good enough Loomis and Loomis intentionally intensity I don't really have the tools to do that I'm afraid whether or not it's powerful enough to do a PCB when I was doing our positive photo resist coated stuff it was it had typically take about 15 minutes in you know the Aussie Sun I did have a UV light box but it took a lot longer I had like some you know germicidal light UV lamps in there I had a couple of like ten waters or something so whether or not this is going to do the business there you go turned off there so that continues to work quite well so I like the implementation whether or not it sir I'm sure yet zoom has done some tests on that and anyway check it well can I check it out I guess you have to email him oh yeah there's the website you see dev dot are you nice not the dish post one thank you very much Frank Bo Oh with a little tube with a little hat on it I don't need the knife for this one that one worked sweet oh it's a lot of paper a lot of paperwork whoa S&B there you go check that out sweet and obviously some big bolt holes on the well on the top and bottom we have a foot switch oh look at that well they grunty Wow oh yeah hook it up to a battery there does this thing do ah yeah looks like we got a big current channel something I've also included the used ICD internal cardiac pacemaker and defibrillator from my wife he came out of his wife okay guesses and what I am attempting especially is actually born on the forum this project came from the eevblog forum sweet it's a battery spot welder that runs from a battery a kind of a chicken-and-egg paradox yeah I sell it as a kid it reminds me of the art was an art of fruit a spark fun who did the soldering iron kit geez I wish I'd thought of that one for for April this is great the soldering iron Q if you don't get it you don't get it also receive the turnigy nanotech battery from their store oh yes I did okay yes yes I did this one goes along with it awesome man hobbyking just how they get their prices unbelievable un-freakin'-believable hobby king of the amazon of you know batteries and drones and chip yes I got the turnigy Valerie sweet here you go tennouji nanotech 5 there you go thank you very much Frank this looks really groovy doesn't it it looks dangerous it really does look dangerous anyway you need a power supply 12 volts with a thousand amp capability hence why you just use you know one of these typical you know what are they for racing cars quad copters whatever it is I'm they can Jenna you know it like ridiculously low output impedance so they can just ones the 3 cell 11.1 volt you know and they can put out the required current in this case to spot world batteries now I've never spot welded batteries before but there are a lot of warnings here so like you don't want to cause a fire in the lab here because if I do it's very expensive so I please forgive me for not trying to spot weld batteries on learn how to spot world batteries just for this bio bag episode and do that as a separate video impressive look at all this you can get it as a kit or our fully assembled I believe thankfully all the like the cables like they take a lot of grub from your soul during I until I solder those babies on and they're nicely heat shrunken everything else that plugs into the battery very nice anyway it normally comes out you know solder yourself with eight eight gauge wire on the thing really beefed up look at that really got oh no oh they're crimped sorry they aren't then I sold it I think they crimped got to have the proper creeping tool to do that I can't just do it dodgy brothers otherwise it's near it's not that great but this is very comprehensive I'm very impressed oh look at that neat there you go that's if you want to solder those contacts maybe you can't crimp those ones and show you how to solder all those in this is very very impressive and how to assemble it Wow completely thorough documentation well done Frank then the operating manual is just as impressive all the bottom and background we thought you know it's designed for like welding your own lithium-ion battery packs together and stuff like that and yes I did get a footswitch with it which is absolutely terrific input voltage for welding four volts 230 volts enabling the use of ultra capacitors if you're an ultracapacitor fanboy Maxim Maxim switch current 2000 amps when you have to do your internal resistance in that micro ohms that's nice anyway it's got a little LCD on it and it's through the calculations and everything Wow the series resistance and calculates all that oh wow maximally oh ah ah Frank's go to town it's going to town this is unbelievable yes sorry I just won't be able to do this in the mailbag because III don't have any cells and there's well no is he giving us some strips is that some strips there for the to do that I think it might be um yeah I need some cells and stuff like that and I'd prefer to not do this in the lab just in case I don't know I haven't done it before so yeah I recommend that you definitely check this out if you want to do some my battery spot-weld it's not just a you know a product to do it but all the information and you know design information and calculations and everything else that comes along with it nice work and here's the cardiac pacemaker that came out of his wife this was implanted in ER up yes they're all hygienic ly are sterilized and all you know as stainless sort of know they're titanium aren't they I think anyway they're all up yeah hygienic ly cleaned and everything else after they're taking out they give it to you as a gift I guess you know because it's a no use to them anyway since you'd medical would looked at their stuff before but it wasn't a defibrillator it was like a what wasn't one of those spinal things you know when those spinal implant stimulator things to you know dull pain and stuff like that anyway this can put out 32 joules of pulse energy apparently wow yeah that'll really shock you back you know it won't it no worries anyway yet that might have to be a separate dead out of course not mailbag well they've been open this one it comes from none other than Christopher J Gamal his team co-host or now pretty much host on the hip cuz I'm not on there much just like okay she's happening honey sit me much Logan he's merch which I'll link it down below of course a nice funky like that's not navy blue is it I don't know contextual electronics check it out I'd all my viewers in Berkeley California that is and Pandy Pandy ever roll thank you very much it's you can yeah this one's got a zippity-doo-dah thing right doesn't tell you a direction doesn't tell you a zipper t do dire direction you've got to get the start right it's all about the start there we go alright have a schematic and a PCB obviously ever rule once a little um commentary on the board awesome let's see what it does this is cool it's a prototype for a battery-powered laser over to be part of a microgravity experiment we'll be flying on a Blue Origin flight we hope to laser oblate materials in a microgravity environment and observe the results using cameras that's cool I seen what you can do that like at 100 kilohertz up where you reach space is that like you know the definition of space the laser we try to drive is 10 watts optical output power and the board is meant to drive about 20 insert a laser for a few minutes while we are in microgravity I assume it's it's conscious constant current driver is it along with this the bulb of a mother than the temperature lays to make sure it doesn't overheat as command at the board using op-amp in feedback around Rudner around I assume our pal fat as a current source yeah it's just the basic constant current source source circuit that we've seen many times there's ducts to control the exact current through the MOSFET and some a DC's to monitor the voltage any feedback and Leia ball is greatly appreciated I'm designed for club I'm in space technologies in California a student runs space group there you go check them out stack berkeley.edu there in the middle of a kickstarter campaign i'm just researching cool it's not a product I assume it's just research nice I'm gonna go check that out and it turns out they raised our 15 grand it's over now unfortunately but maybe you can still contribute if you want to anyway I don't know got a lot lice big buses here for your output current and your output filter in here using SMD caps you of course you'd use like low ESR art type ones in there no doubt looking down in here there we go we're obviously got a current sense resistor over to here nice lots of via stitch in here tiny little pads for this little tiny power package here of those pads too small okay small IR Wow what package is that that's insane they're the two MOSFETs obviously but she's a tiny little pads on can hardly see them anyway in terms of layout that looks quite a reasonable I mean they're you know tapping off the the voltage since they're not quite exactly on the pads but yeah you know near enough and they've obviously got I haven't even looked at the schematic yet they've obviously got a difference amp in there which then the microcontroller here senses the layout actually looks fine and dandy yep plenty a ground plane on the bottom lots of ear stitching nice okay I was wondering what that is there and that is a they don't have it labeled why is it like a couple of other but it's like that's labeled that chip there is labeled you tend what happened to the rest of the designators if you go to the effort to put your silkscreen make sure you get all your designators on there I assume I've got it upside down so all the electrons are going to fall out anyway it turns out that is a transformer over here like this because you know in a system like this doesn't surprise me that you have to galvanically isolated that's what it's traditionally called just when you transform our isolate something like that it's called galvanic isolation it just means it's electrically isolated between one side and the other so all this laser driver is all are floating no worries and I hadn't seen this chip before but damn I like at the LT 68 20 what they're doing here as I thought you know are they're just doing some you know like simple custom serial interface this is actually SPI over a guide galvanically isolated twisted pair and that's what this chipset does from linear technology here's the datasheet and it you just put one of these at each end and you've got a full SPI compliant interface over one galvanically isolated twisted pair fantastic I don't think care what this thing cost it's dead brilliant anyway that takes all the dickery out of yes that's an industry term dickery out of like your interface just uses standard SPI interface and you don't have to use like multiple optocouplers or anything like that in multiple lines no that's a great solution I'm gonna have to remember that chip that's really neat how long that's been around and again it's been a long time since I've seen do any galvanically isolated serial interface as often either rolled my own for that sort of aspect anyway we've got an 80 here we've got the programming here though we just got some decoupling no worries and it looks like we've got a serial analog to digital converter there couple of maxim parts max forty one thirty more max and parts guaranteed not to be able to get them that's a 1990s joke for maximum 53:31 that'd be a DAC don't even have to look up the datasheet for that it's a voltage output DAC using an internal reference just a buffer driver to drive just your standard constant current circuit you've got two MOSFETs in parallel here don't have a current sharing resistor between the MOSFETs often you'd put like a low value resistor in the line you know it's one going here one going here just so they share the current more evenly because when you try and drive those I don't know you know you'd have to do some practical while testing on that because your one might find that one just due to the parasitic differences in the specs in these chips because they are going to be identical even if they're they're better matched if they're from the same wafer but they're unlikely to be and well you can't assume that they're going to be matched and otherwise you buy it matched pair of MOSFETs anyway I'm tangent in you put in a current Sherin resistor so I'll just load balancers between the two just a really low value in there and then they've just got their 10 milli ohm shunt resistor which will be that job over there that we looked at where it is there and as and it senses that off no it doesn't okay I was wrong about the difference amplifier there it looks like that they're just tapping that off there probably that's probably the ground line yep I'd say that's the ground line for the chip now they've done that right like hats off well done but I would have put a design note just a little box on here where my you know an arrow pointing up some design notes on your schematic just to remind yourself that yeah the ground for this because that's the reference has to come back to here like this it has to be that you know star pointed type thing otherwise if you just go this schematic anyway they wouldn't have known no one to do that if they didn't know about the design topology going on here so that's why our design notes help on your schematic but that was sort of obvious to me it may not be obvious to someone else who you know you might have gave and given the layout to someone else you give the layout to someone else to check and they go what's this just tie it down the ground over here and you know anyway no I have no problems with that at all that's nice work I hope it works well for you keep us updated in the eevblog forum thread or comments thank you very much Larry shush doc from Ellington CT is that Connecticut bad with my us states from Australian I have to memorize them at school it's an electroluminescent life assembly so I'm not sure what Larry wants us to do with this electroluminescent light strip here um I kind of like him you know nice and flat and everything else I'm dead died today let's maybe just feed some voltage up it's clacker and anyway it does have custom little connector like that so it's obviously designed for some sort of you know custom product yeah industry specific thing probably you know spare part probably you know the whole thing probably cost couple hundred bucks Wow check out the wanker equality on that sir that rubber sleeve in oh it's pornographic as much as I'd like to go high voltage rock and roll here it's a long way to the top um I don't have a electroluminescent driver ready to hand so I guess I don't know maybe we can just have a look inside it's pretty boring isn't it I don't know what's the actual construction of these things I've never really never really looked into it Wow it's not easy to get in there and actually start peeling off the layers in there it's all like heat bonded together it's not gonna come apart nice and all by the looks of it you can see on the back here they do have three layers is his cream-colored one the wider one and then the gray type one on there and then well no that looks like the gray one is the outer top one there might be some other layers in there or whatnot but yeah I don't really know how they get in there huh I tell you what if we slice and dice that and get in there and have a squiz you can see that there's this yellow stuff is like a it's like a paste or something like that and ya don't know what the silver one there and find any info paste it in but offhand I don't know about the construction of those anyway they do light up due to a material physics magic we have a Kickstarter hopefully it's still running I was just telling my live audience you're watching this live that there's probably 30 items on the mailbag shelf there there's just a lot like lots a small little like envelope packet e things as you know some lots of little um like a few like you know they just ordered them from you know eBay China kind of thing and I still do have that lost footage to do the lost mail bags you must lost Chinese mail bags Oh anyway I'm sorry Netherlands hi to all my viewers in the Netherlands doesn't have a name just post pass anyway I'm sure there's details in here hey thank you very much Atika and simone for their i squid see kickstarter let's check it out so a ticket and simone of sent in this i squid see rotary encoder theme which looks like very simple i mean yeah it's a rotary encoder on an I squared C bus there's a little micro on the back that you know you just plug in a standard pin out rotary encoder onto the thing but the good thing is is that these can all be joined up together in a grid arrangement by the way so you could have like a complete grid of these things and you don't even have to use the the pin headers in here you can actually just but solder these together like this and I think it's a brilliant idea if you have to do like a couple of rotary encoders for your project then yeah you can like send the rotary encoder lines back to your microcontroller in your project or whatever controller you got in there but once you get past a couple of them not only do you have the multiple lines but then the software has to continually read those in real time that's a pain in the butt it'll be much easier if you didn't I squared C interface and then you could interrupt the thing and stuff like that and it's got these output pins here which you can hook up to LEDs or you can have them as a digital input or output or an ADC as well so that is really quite its nicely implemented I mean it's really nice in terms of you know a functionality I mean probably if you only had two rotary encoders you probably wouldn't go to this effort you just do it yourself but you know if you wanted to take the like the software like them you know if you didn't want to write your own I squid see rotary encoder routines and stuff like that then you know but I think the real value and this is having like large arrays of controls and that's really neat and of course here you could handle these these are push-button ones as well can handle all those anyway I think that's a great little project and everyone else seems to agree because there's as I make this there's only 16 hours left in the Kickstarter campaign sorry about that so probably by the time you watch this it might have just ended but I'm sure you can still buy it so that is a really neat project and they plan to make it open source when it's finally available and they've got a full manual which goes along with it they're going to open it yeah they say that they can open source it when the things finished there you go you couldn't just but solder and together like that really comprehensive documentation oh and you can set the address as well because that's important you've got to be able to set the address for the individual units because they're all individually addressable so you just pin strap are those and you know you can have like 128 of them presumably so that's neat and there's all the information for driving the registers and everything else fully documented that's a great little niche Kickstarter project and congratulations if absolutely smash their target link down below so thanks to everyone who said something into today's mail bag if you like mail bag please give it a big thumbs up and as always discuss down below catch you next time [Music]

Channel: EEVblog

Views: 202,720

Rating: 4.8427653 out of 5

Keywords: eevblog, video, mailbag, power grid board ground, TI-nSpire, TI-nSpire CAS+, TI-nSpire CAS+ calculator, calculator PROTOTYPE, i2c encoder, kickstarter, laser diode driver circuit, circuit review, diy jbc controller, jbc soldering iron controller, usb soldering iron, medical dvd recorder, dvd video recorder, teardown, sony dvo-1000md

Id: e4lIkonz7Rw

Length: 67min 18sec (4038 seconds)

Published: Sun Jul 29 2018