EEVblog

Рет қаралды 106,139

Күн бұрын

Double 13 is worse than normal 13, obviously. More mailbag.
Forum: www.eevblog.com/forum/blog/ee...
SPOILERS:
Back in the old lab!
Vintage Soviet Union PC.
00:00 - Mailbag
10:42 - 3G modem with a funky antenna.
13:52 - IOMEGA ZIP drive teardown
18:56 - USB to RS485 interface olegkutkov.me/
19:52 - Another Byte magazine cover! bytecovers.com/
21:41 - Smoke alarm sensor teardowns
26:58 - Reverse engineering a Cooler Master PSU
34:45 - $1 ebay power adapter teardown gets Widlarized!
38:39 - Stonetech smart integrated LCD module www.stoneitech.com/
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Пікірлер: 608

@Seegalgalguntijak 4 жыл бұрын

So Dave, why is it that you're back in the old lab? Did you give up the new one? Or just use the old one as an extension to the new one? Somehow, I've never gotten a reply to that... Come on, Dave, take us on a lab(s) tour and explain what you're doing where and why! Pretty please!

@EEVblog 4 жыл бұрын

I have done video for supporters explaining this. Also available on my Library channel if you want to watch them.

@Seegalgalguntijak 4 жыл бұрын

@@EEVblog I now found it, yes, alright, thanks. Navigating lbry is quite different and unusual, compared to youtube, vimeo, dailymotion and what other video sites there are.

@user2C47 4 жыл бұрын

This is a fact normal people are not permitted to know.

@julianreverse 4 жыл бұрын

@@Seegalgalguntijak Can't find the video, what happened?

@HighestRank 4 жыл бұрын

1:24 “all the economics behind it”. Do you sleep through the first 2 min or are violated senseless by Dave’s shallow intel?

@MrElbK 4 жыл бұрын

Thanks, Dave! I almost lost my package because it wasn't tracked at all. Happy to see it in Mailbag :) -- Oleg from Kiev.

@Vik_ru 4 жыл бұрын

Я на английском не понимаю, но это там ваше рабочее место на фотке? %))

@MrElbK 4 жыл бұрын

@@Vik_ru Нет )

@TymexComputing 3 жыл бұрын

Good job! Hope the Crimea will be brought back to Ukraine - i noticed the nostalgy

@foreignautomobiles 2 жыл бұрын

Hope you are doing ok with everything that's going on.

@MrElbK 2 жыл бұрын

@@foreignautomobiles Yes. I'm okay.

@tareqsu4972 4 жыл бұрын

It is not uncommon to have antennas that "look" shorted. A very basic example is a loop antenna, which is simply a loop of low resistance wire, basically a short circuit. In fact, most microstrip antennas (The ones printed on pcbs) have a shorting pin or a shorting wall, by putting thees shorting pins or walls (among other techniques) you will be able to make your antenna smaller for a certain frequency. Of course in reality it is much more complicated than that, and nobody can look at an antenna and tell you why is it shaped that way, except maybe for the basic shapes. You usually start with some basic antenna shape, add your space constrains, and the software would iterate and optimize by simualting the antenna performance.

@therealjammit 4 жыл бұрын

I like to think of them as an auto-transformer. The input is a common ground plus drive, the output is the common ground plus the free end of the transformer. Sort of like an impedance matching transformer.

@ramdasprasad3792 4 жыл бұрын

Isnt that a fractal antenna.. the pattern repeats..

@RobertPl0 4 жыл бұрын

Dave. Mera's computer was made at the MERA plant in Zabrze Polska in 80's XX century. Mera 7209 was a computer terminal. Designation CM 7209 is a commercial designation, used on the international market; while the symbol MERA 7953 is a designation used on the domestic (Polish) market. Computers ware exported from Poland to other country soviet block

@TomashPL58 3 жыл бұрын

I would like to add, that UCY chips were usually logic gate chips and were very common from CEMI. I saw these very often since I was a kid, and I was born at 87. CEMI was an electronics manufacturing plant located in Warsaw, Poland. Very reliable chips they made. I'm still using some today (mostly logic NAND gates like UCY7400 ). Great piece of history tough!

@apatewnayeah9854 4 жыл бұрын

Time to hang a big poster outside "dump your 70+ inch TV here"

@OzRetrocomp 4 жыл бұрын

"Free e-Waste Recycling Centre"

@lordelectron6591 4 жыл бұрын

Would rather a poster " all unwanted electronic dump"

@SilverSpoon_ 4 жыл бұрын

@Dave Micolichek David isn't asking, it just ends there anyways.

@TechnikZaba 4 жыл бұрын

8:00 A lot of CEMI,- no longer existing Polish enterprise producing microelectronics. Was closed down in 1994. CEMI located in Warsaw produced: discrete components, bipolar systems

@ITTom 4 жыл бұрын

...zapewne wyprodukowane i eksportowane na mocy „przyjaźni polsko - radzieckiej” 😉

@OblivionLPS. 4 жыл бұрын

Przeoczyłeś zielony kondensator Iskra na środku płyty PCB. Widać nawet trójkąt ze znakiem jakości 1.

@evensgrey 4 жыл бұрын

And MERA was a Polish miniciomputer series in the 70's. At some point they would have likely built some VDT models, as teletype-based terminals are slow and obnoxious for many purposes. They would have continued to be useful even after the MERA line was discontinued, and might have found there way all over the place. The design principle looks similar to the PDP-11/110 and /130 from DEC (computer squeezed into a VDT case, although a micro instead of a miniaturized mini, in some ways like a Sol without an expansion system).

@hikariyouk 4 жыл бұрын

My Frequency Central Product modular synth module has a few CEMI components on it.

@urugulu1656 4 жыл бұрын

no dave its not 3.3 volts by the looks of it. i cant see a dot anywhere. looks more like 33v for what ever

@eDoc2020 4 жыл бұрын

It's probably for directly controlling the CRT. Don't know the specifics but I believe some screen or grid voltages are in that range.

@OfflineSetup 4 жыл бұрын

Where my dad used to work (in the 70s) there was a electronics genius who had been at the company for years. So respected that when he died (he never retired) they "preserved" his desk and no one was allowed to sit there. I can't imagine that attitude would find a space in modern companies.

@andyhello23 4 жыл бұрын

I agree, nowadays companies will take every they can get from you, and throw you away.

@demef758 4 жыл бұрын

Apple preserved Steve Jobs's office, too.

@sanches2 4 жыл бұрын

I work in a modern company and we've preserved Slavi's (an colleague engineering tech fellow who suddenly passed away) desk untouched for 3 months just for the sake of remembering him, now we only keep his lamp there. He was the center of the electronics department, always hanging out and telling jokes with the young ones and a mathematician and a great electronics engineer. We still talk of him and miss him.

@OfflineSetup 4 жыл бұрын

@@sanches2 Perhaps things haven't changed. Sorry for your loss, all we can do is show respect and raise a glass to memories.

@demef758 4 жыл бұрын

Steve Jobs' office has been preserved as well after his death in 2011.

@JerrySmithKociak 4 жыл бұрын

@8:23 - those CEMI chips were actually made in Poland. Prefix means: U - monolithic bipolar IC, C - digital circuit, Y - for professional use. Numbers are familliar, because those are the actual 74xx series IC's. I've got some of those, some are like 30 years old now, and they are still working fine. Greetings from Poland!

@neidan56 4 жыл бұрын

CEMI was Polish manufacturer of 8-bit chips, it closed in 1994 :)

@PiRX 4 жыл бұрын

and Mera was Polish brand too ;)

@thpeti 4 жыл бұрын

MEV was a hungarian semiconductor company, separated successor of the semiconductor division of Tungsram, which was a lamp/tube factory, later bought by GE in the 90's. They had a serious fire in 1986, and the wafer fab wasn't rebuilt after. I've heard a legend that they were ready to produce Intel 8085/8086/8088(?) clones just before the fire disaster in the wafer lab. I have several MEV branded 74 series logic gates, some 741's, 709's and several TV specific components, like TBA 950 sync IC and TDA440 IF lying in my drawer. Also they had a large scale of bipolar transistors, like BC182/212, BD135 till BD249 series... The story in Hungarian can be read there: www.villanylap.hu/blog/4590-mikroelektronikai-vallalat

@detalite 4 жыл бұрын

Manufacturer of that MERA CM 7209 terminal is still functioning. Ealier known as Mera-Elzab, now just ELZAB.

@mieszkogulinski168 4 жыл бұрын

@@detalite the ones who product cash registers?

@krzysztofkozorys516 4 жыл бұрын

Pamiętam, pamiętam tamte czasy 👍

@thecrikster 4 жыл бұрын

Haven't seen a GUI that pretty since the days of MS Access!

@badstate 4 жыл бұрын

ZIP was a horrible design. The edge of the disk was exposed in use. When the head got damaged, it would chip the edge of the disk. If you put the damaged disk unknowingly into another drive, the chip in the spinning disk would catch on the new drive's head, breaking it as well. This cycle would continue for every drive and disk you tried. Went through a whole office of four or five ZIP drives and multiple disks one afternoon before I realized what was happening.

@erg0centric 4 жыл бұрын

by design

@danm3188 4 жыл бұрын

Maybe not a great design, but very useful at the time (mid to late 90s). Otherwise we were still depending on the common 1.44MB floppies or dialup modems (56Kb?) for transferring data. The 100MB Zip drives were very welcome... while they worked. CD-Rs were available, but still not very common and still a good bit more expensive at that point. I had maybe 20+ 100MB Zip disks at one point, and only had a few disks go bad on me before finally getting a 4x CD-R drive for around $200 in .... 2000?

@rasz 4 жыл бұрын

7:00 Mera was a polish computer design and manufacturing unit. They started with paper perforators, then calculators, later licensed terminal designs from Swedish company, then TRS-80 clone. After fall of Iron Curtain they managed to stay afloat by restructuring and switching markets to point of sale systems, Today they are still a local leader in this field. MERA CM 7209 (MERA 7953) is a terminal dedicated to Russian RIAD systems, direct unlicensed IBM System/360 clones. 8:00 Some polish manufactured semiconductors on the PCB. Unitra CEMI UCY chips 74 series. MCY series are microprocessor clones. Unitra CEMI even cloned Intel 8085 at one point. All behind Comecon (cold war) embargo.

@nathantron 4 жыл бұрын

There's something terrifying but completely normal about some aussie waving around a giant ass knife without a care in the world.

@Metroid1890 4 жыл бұрын

I have nightmares about that pretty often

@pixymisa8087 4 жыл бұрын

@Emmanuel Goldstein This being Australia, we have more guns now than before they were banned.

@SolaLupus 4 жыл бұрын

Especially in front of a large LCD TV. I was anxiously waiting for the moment he accidentally pokes the screen.

@HighestRank 4 жыл бұрын

MichaelKingsfordGray supposedly Mozart was infatuated with feces. It is what it is.

@johnvine5731 3 жыл бұрын

That's not a knife .......

@twicebittenthasme5545 4 жыл бұрын

Cool stuff. Enjoyed the tour. Thanks for sharing!

@douro20 4 жыл бұрын

ES EVM was a series of plug-compatible mainframes first developed in the late 1960s. Both 360 compatible and 370 compatible versions were developed. IBM actually provided software support for these starting in the early 1970s. The chips marked "CEMI" were produced in Poland and actually use Western numbering conventions. The chip labeled UB880D is the CPU.

@sircompo 4 жыл бұрын

That Zip Drive head looks like the voice coil you find on hard drive heads. Miles ahead of stepper motors and not at all how-ya-doin'.

@victortitov1740 4 жыл бұрын

I wonder why no CD drives had such a positioning system. In CD drives, it is always combined crude (and noisy and slow) mechanical + fine voice-coil based positioning.

@NiHaoMike64 4 жыл бұрын

@@victortitov1740 The optical block is a lot heavier, so cheaper to use stepper motors.

@rasz 4 жыл бұрын

stepper is cheaper, you dont need precision in optical drives because lens assembly compensates on its own

@sircompo 4 жыл бұрын

@@victortitov1740 Possibly for cost. I don't think the seek time on optical media was considered that important, especially as the rotational speed was so much lower than hard drives.

@eDoc2020 4 жыл бұрын

@@NiHaoMike64 Actually all the CD mechanisms I've examined use regular brushed DC motors. Even cheaper than steppers.

@YSoreil 4 жыл бұрын

That McDonalds bag packaging is so good

@vaguedirector_7342 4 жыл бұрын

(29:00) ATX power supplies like that typically have this power path: Input filter -> Rectifier -> Active power factor correction boost converter -> bulk 400V capacitor -> push pull or similar transformer based step-down converter -> 12V DC bulk caps and 12v output -> secondary buck converters for 5V and 3.3V outputs. And some of the newer super high efficiency ones will have some sort of resonant converter doing the 400v DC -> 12V DC stage, which require some proper wizardry to design.

@SteveJones172pilot 4 жыл бұрын

I definitely remember that BYTE magazine cover... Great old magazine!!

@renatoencarnacao5490 4 жыл бұрын

At 8:24, That oddball, made-in-Portugal, TI 74LS113 made me smile all day long!

@lhxperimental 4 жыл бұрын

Australia: Where you can hope to find a 70 Inch TV in a dumpster.

@lcdconsultant5252 4 жыл бұрын

helloworld and a working 70” HD TV by the way

@stranger7968 4 жыл бұрын

It's a business building dumpster though. Rent an office in your city and you might find working tvs too :P

@UpcycleElectronics 4 жыл бұрын

You'll see them here in Southern California on the curb in high rent areas. Half the time it's from evictions of some twenty something that got, then lost, their first real job. The $3000+ per month rent is a killer. The other half can't fit the thing in their Lambo to take it to the recycler.

@HighestRank 4 жыл бұрын

LCD consultant -no whackers!

@jorditribo94 4 жыл бұрын

28:30 Diode Gone Wild KZfaq channel did a reverse engineering in a pretty complicated PC power supply.

@arekw7388 4 жыл бұрын

MERA 7953 Z (CM 7209) is a computer terminal produced in the 1980s in the Mera-Elzab Computer Equipment Factory in Zabrze / Poland. Greetings from Poland!

@Michael_Michaels 4 жыл бұрын

8:52 Portugal!!! My beautiful country!! That chip is from the late Infineon, later Kimonda.

@edwardneuman6061 2 жыл бұрын

Some of the caps on that board look like they've seen better days, LOL.

@jimmyramkisoen191278 4 жыл бұрын

That green PTC 30:04 is used as a Inrush Current Limiting. During power on, a high inrush current can occur because the power supply’s link capacitor functions to dampen ripples in the output current. This capacitor acts like a short, causing an inrush of current. The inrush lasts until the capacitor is charged. Length of the inrush current depends upon the power supply and link capacitor.

@RobertBardos 4 жыл бұрын

Dave, long time viewer to say , I think you should abandon the tv screen idea or have it up and off to the side as a additional background but not the main event. Dave your fans come to hear u talk about electronics and I personally like when you get the microscope out on interesting tear downs. Walk away from gimmicky bullshit other channels might be doing. Keep it fresh. You are the product. Not a background or a 70 inch tv or whatever. Keep it old school man.

@Alexagrigorieff 4 жыл бұрын

8:43 - К573РФ5 is UV EPROM 2K*8. 9:08 - КР580ВИ53 is a knockoff of i8253 timer. КР537РУ10 is CMOS SRAM 2K*8 bit. First letter К means the part is for use in non-military applications. Second letter Р, if present, means plastic package (otherwise ceramic).

@bradgriffiths3370 4 жыл бұрын

Happy days! I'm glad to hear you might be moving back, I may see you in the hallway one day.

@j3rod 4 жыл бұрын

Always good with a mailbag video ,, thanks

@jolilos 4 жыл бұрын

you should do a video wall made from dumpster finds. I mean a big TV is boooring - have some 19" , some vertical 30", .....

@caromac_ 4 жыл бұрын

That souds amazing. can probably drive them with a scavenged desktop with 2 gpus.

@jolilos 4 жыл бұрын

@@caromac_ or simply from a media player displaying slides for the secondary monitors.

@HighestRank 4 жыл бұрын

MONSTER4242 & caseless mailbag power supplies.

@lordelectron6591 4 жыл бұрын

I have a 7" Tv

@StreuB1 4 жыл бұрын

13:40 I literally blurted out laughing at work. Friggin Dave. lol

@sysghost 4 жыл бұрын

38:13 - So *that* is how low profile caps are made? .. Gee... Who knew?

@mieszkogulinski168 4 жыл бұрын

8:24 - UB880 and all 80A-... East German, KR580.. and later KR537, KR531.... are Soviet (as written on the package), UCY/MCY... are Polish (where MCY74011 = 4011 CMOS circuit, and UCY are TTL circuits), and 75...PC (around 9:13) are probably Hungarian.

@wolfiexii 4 жыл бұрын

I love your precision percussion alignment tool

@denniswoycheshen 4 жыл бұрын

Man that's such a cool idea with the tv... You rock Dave!!!

@fk6536 4 жыл бұрын

on the zip drive, the interior (where the drives pushes against, and the motor is mounted on) needs to come up to spin the drive.

@sloth0jr 4 жыл бұрын

Definitely remember that Byte magazine. I still have my 1982-91 Byte magazines.

@mutatedpixel8042 4 жыл бұрын

I kind of like the framing that the TV provides when it doesn't take up the entire area.

@nulano 4 жыл бұрын

13:00 I have seen an antenna like that in old (only a few years) smartphones. It was bend around the corner. I'm sure you can find similar ones in modern phone teardowns.

@dykodesigns 4 жыл бұрын

8" floppy, maybe Curious Marc can read the disk for you. The Fairlight CMI used those 8" floppies as well.

@Psychlist1972 4 жыл бұрын

IMO, I would: Raise the TV. Move it to the left. Sit more towards the right and have the camera angled a bit. So rather than a full back drop, it's more of a 3/4 view and you are no longer centered. I think that will look a lot better. This is true even if you get a larger TV.

@twobob 4 жыл бұрын

That widget set is really dated on the Tool 2019 look more like 2009 to me. I suspect that was built with a "how to build a program template" ten years ago and never got updated ;)

@JohnDoe-eh4id 4 жыл бұрын

It makes me smile to see Dave casually waving a dagger while talking about mailbags

@zyspan 4 жыл бұрын

Great idea

@FruitMuff1n 4 жыл бұрын

Sounds like you need an array of dumpster dive LCD screens all wired up as a single display :)

@PeterHaida 4 жыл бұрын

Displaying other viewers lab's in the background is a brilliant idea, please make it a permanent feature of your mailbag videos.

@TzOk 4 жыл бұрын

MERA was a Polish company, so was CEMI, who did the UCY74xx chips used on this board. These are regular 7400 series TTL chips.

@cerglabs3646 4 жыл бұрын

Love the "Guest Lab" idea!

@jorno1994 4 жыл бұрын

Could get an overhead camera to show details when you want to. could use your old cam even.

@EEVblog 4 жыл бұрын

That's messy. I like opening all the packages and then filming detail as I normally do. Framing and angle is way better than overhead shots which I hate the look of. Would likely be more shooting time inefficient too.

@btizef2008 4 жыл бұрын

Dave Jones, destroyer of Zip drives! 😂

@boris2342 4 жыл бұрын

Fixed it so good ... even had spare parts left over

@DanielLopez-up6os 4 жыл бұрын

A Ultra Short Throw Projector would work aswell as it could be behind you but still show Images up to 120 inch, without glare.

@Siktah 4 жыл бұрын

Fantastic idea regarding the viewer lab background. Time for me to tidy up mine! Also grr I do kinda need a Zip drive...

@joselaw6669 4 жыл бұрын

Not the idubbbz we deserve but the one we need.

@SolaLupus 4 жыл бұрын

26:14 If I remember correctly, the voltage is not applied across the Americium itself. It is between the walls of the chamber. In a normal state, the americium ionizes the air between those contacts just a little, so there is a constant small current, but if smoke particles enter the chamber, they are much easier to ionize and the current rises sharply (that is what the detector looks for).

@rmy3918 4 жыл бұрын

CCCP : ) send that 8" to CuriousMarc, he loves Russian stuff too, don't think u will get many Zip Drives for repair after that LOL

@ZomB1986 4 жыл бұрын

Or to The 8-bit Guy

@BlackEpyon 4 жыл бұрын

I was thinking of CuriousMarc as well. I'm also wondering if anybody has figured out how to repair the "click-of-death," because ZIP drives are gonna become hard to find before too long. Some of us retro-computer enthusiasts like to keep our stuff working.

@HighestRank 4 жыл бұрын

BlackEpyon the disc themselves is the culprit. You have to jimmy open the metal shield and manually-rotate the platter looking for chips on the edge before every insertion.

@tad2021 4 жыл бұрын

Another option, Find/get/acquire one to two more TVs and set them up for a fake window. Either two side by side to span the width of the frame at the top, or three in portrait across the whole background view. From what I remember, the click of death only affected the original ZIP100 devices and was fixed before the ZIP250. The big problem with the click of death was it damaged both the drive and disk, so an clicking drive would ruin a ZIP disk and an damaged disk, either from a clicking drive or physically damaged from being dropped, would give click of death to a susceptible drive. In school, some of the computer labs had ZIP drives, click of death quickly killed every early model drive and took a lot of projects with them; every replacement ZIP100 drive after that were immune to the fault.

@ghlscitel6714 4 жыл бұрын

I hope the dumpster is closer to the old new lab.

@Seegalgalguntijak 4 жыл бұрын

These "intelligent displays" embedded devices are basically a complete small computer, which is fascinating. In Germany, we do have a quite extensive bottle and can refunding system with different classes of containers and different prices, as well as different sorting behind the recognition, so the machines have to do image processing/pattern recognition, barcode reading and sorting. I've seen one of them boot up in 2007, and it was a Linux PC, a Celeron thingy. With this display, you could make it much more modular, have one dedicated unit for the bottle/can recognition, one sorter/crusher unit and a printer unit for the vouchers, and have it all be controlled by such a dinky little display screen.

@tveasy5172 4 жыл бұрын

I made my first Z80 based PC in that 89, from PCB ( had some shorts), then had to find all the components from market in Moscow. Recording data on cassete deck, tube tv used as a monitor via RGB.

@HighestRank 4 жыл бұрын

Russia Germany Belarus made the best CRT in the world.

@thomasbonse 4 жыл бұрын

It was the LS-120 drives that were 3.5 floppy compatible, the zip drives weren't.

@EEVblog 4 жыл бұрын

Ah, that's what I was thinking of.

@WreckDiver99 4 жыл бұрын

I remember that cover...So many times I bought Byte...

@arthurtaggart 4 жыл бұрын

Nice idea for the backdrop! Maybe a projector would be better RE sizing?

@DoctorThe113 4 жыл бұрын

Hi dave since you included a cheapy charger, i wanted to know how can i remove the effect of capacitive coupling between the mains input and output. I measured capacitance with my multimeter and turned out to be around 200 pf-ish for all of my specimens including a iPhone charger. I am a teenager and dunno anything about mains part of a PSU. But i want to make a switch mode psu (regulator part, not the mains part) soon. And capacitance coupling mess with my prototypes whenever i try to power them with a two prong psu.

@arthurtaggart 4 жыл бұрын

Would a polarising filter help with the reflections?

@marcelvandenbroek537 4 жыл бұрын

the plastic spacers prevent shorting of the metal transistor housing with the solder pads under the transistor.

@MrThoriam 4 жыл бұрын

even with this screen looks awesome

@mad_hatty 4 жыл бұрын

I love the idea of a tv for real time pictures, it isnt distracting and it wont take focus away from the table as it normally would with a cut-away.

@MrAbrandao 4 жыл бұрын

I need to find a 70" TV in the dumpster too.

@hccaos44 4 жыл бұрын

The "Video thing" at 8:31 is an Eastern Germany Z80 CPU Clone. The 80A CTC and SIO are from the same plant located in Erfurt.

@RobTheSquire 4 жыл бұрын

TV background better than green screen by miles.Even using it to showcase subscribers labs is a nice touch. Once my garage is built i shall send a pic or too. As everything electrical and mechanical will be hacked and welded together in there.

@thecarl168 4 жыл бұрын

good idea of having picture of other lab

@VividNation 4 жыл бұрын

Honestly, if you do it like that you loose a great deal of cozyness lab atmosphere of yours. I loved to see how you arranged everything behind you on your shelfs and the details and stuff. It was looking "homey" if thats a word. At the moment is just sterile ;) so pls keep that in mind.

@volvo09 4 жыл бұрын

Dielectric Videos! I started following him a few years ago and I thought the supply story sounded familiar!

@Electronics-Rocks 4 жыл бұрын

Sounds interesting to have viewer labs as background. The Smokes revisit was aico.co.uk due to power consumption using an old school Zener diode. I have a few on my bench which I an fitting new permanent lion batteries as supposed to last 10 years but the sparky forgot to change a switch on fitting my win. as they cost £80 each as have a wireless link. The sensor was optical. Also one funny note we was only allowed to carry 7 ionising detectors in the car duff or new to fit.

@disorganizedorg 4 жыл бұрын

Now I feel old. As recently as 1998 I was using 8" floppies at work on PDP-11's driving Bell & Howell 3800 and 6700 series COM (computer output nicrofilm) recorders. I'm pretty sure that was also the last time I hung a 9-track tape.

@TheOnlyPsycho 4 жыл бұрын

You could try getting the TV to fill the background by setting your video camera further back and zooming in, not sure though if the effect will work with the space you have.

@josephcote6120 4 жыл бұрын

The ZIP drive carrier moves upward to engage the drive pin into the drive hole on the disk.

@John_Ridley 4 жыл бұрын

The insidious thing about the click of death is that it was contagious. If the drive developed it, it would damage any disk that you put in it in such a way that if you then put that disk into another drive, it would damage that drive and it would then have the click. Zip discs were not backward compatible. There was an LS120 competitor to the ZIP disk that was 120 megabytes but backward compatible to floppies.

@MC_AU 4 жыл бұрын

Voice-coil head positioned were common before angular and stepper motors. Check out the DEC RK05 and similar platter drives from the seventies.

@SeanBZA 4 жыл бұрын

Still have 2 Zip drives, and a disk or two as well, one external SCSI and one parallel drive, which both look almost the same from the front and rear, except SCSI has a switch to select between ID 5 or 6, so you could have 2 of them on a single SCSI bus. External terminator only.

@daddylonglegsx9725 4 жыл бұрын

I was against changing the mailbag format but this is a genius idea and would love to see it continue! Maybe a projector could provide a larger area behind you instead of a TV

@TheIanBach 4 жыл бұрын

Would rear projection work, solve the reflection problems and also be cheaper?

@kasamikona 4 жыл бұрын

15:38 moment of death for that poor flat flex...

@hikariyouk 4 жыл бұрын

The late 80s date on that board would put it post-start of perestroika, so it was probably getting easier for the USSR to get hold of western components.

@weirdworld3874 4 жыл бұрын

That concept would be amazing, but only labs but other things such as circuits, data sheets and other general info for products. Dedicated camera with feed to the screen for close ups, with mixing/switch for cameras.... almost need a camera operator lol

@Razor2048 4 жыл бұрын

For that 3D device, it seems like an early version of the more common LDS antennas.

@wjodf8067 4 жыл бұрын

looks good !!!

@clemenswalter1984 4 жыл бұрын

I have one of these 1$ usb powersupplies, but with the optional optocupler populated, bit it makes absolutely no sense, as some of the legs aren't even connected. Due to safety concearns i have never pluged it in. was wondering if I should send it in, but thought it wasn't worth the shipping.

@englishrupe01 4 жыл бұрын

Don't bother. He'd just open it with a hammer, like he did the Zip drive. Then make some inane comment like "Oops!" and throw it in the bin. Save your money.

@mesolsot 4 жыл бұрын

@13:00 If you want to see something else like that with an odd-ish antenna I recall seeing some pretty interesting chamber and bounce plate harmonic stuff going on inside the satellite dish receiver, the piece on the dish itself that is. One I pulled apart last (Direct TV late 90's early 00's dish if i recall) was an aluminium can that split apart to reveal a gold trace board and a bunch of chambers and discreet filters and just a real beauty to look at for hours. I have another 3 port dish receiver to take apart if you want pics. One I did was one port, channel with a plastic dome, focal point, whatever. 😁