Old component bonanza Mailbag!
Forum: http://www.eevblog.com/forum/blog/eevblog-936-mailbag/'>http://www.eevblog.com/forum/blog/eevblog-936-mailbag/
SPOILERS:
TI-74 BASIC pocket computer teardown from 1985
OpenMYR WiFi Motor Kickstarter
https://www.kickstarter.com/projects/77886650/wifi-motors?token=9aa90ab1
Several 4-banger calculators
GEZE automatic roller door controller teardown
E-Book reader teardown and PCB bypassing techniques,
http://www.switchandlever.com
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Hi Welcome to everyone's favorite segment mailbag. Let's get right into it. Thank you very much! Kyle Berezin I Think um and this one is a crowdfunding in progress. Please Open Ice app.

Hope you haven't missed it. Reused Soda Digi-key What? Sure it is a motor with a 3d printed bottom on it I Do believe I think I Got an email on this one I Do believe it is a it is the Open My Our Wi-Fi motor. Yes it you talk to it with Wi-Fi you apply power and apparently even control it. Wi-Fi Let's take a look.

So here we have it. Here's our Open My Our Wi-Fi motor with the 3d printed our bottom enclosure on it for the Wi-Fi Electronics Yes, they are doing an injection-molded our version of this so they say so that's part of the Kickstarter. They're currently only up to about $6,000 or something of their $80,000 they want, so that's a lot. Anyway, I'll link in the Kickstarter down below and yes, it uses the Esp8266 as the Wi-Fi radio.

Now I've hooked this up to 12 volts and it's drawing about 200 milliamps or thereabout so about two and a half watts. but I can feel that vibrating I'll see if I can actually get the sound here anyway. it's got to build in a webpage where you can actually control the thing from and as UDP packets. JSON Whatever that is not into that sort of stuff and there's the QuickStart guide you provide twelve volts you I opened up with your in this case I'm going to use my phone.

We go to this address and we should be able to control the thing. Let's give it a bill now. Connected down, no problems whatsoever. My phone found it and hooked up, but there was no security.

Then that's the thing with these Internet of Things gadgets. There is no security. We've had that recent security thing where you know hack where this could be become a zombie mode and it could be hacked and you know, run malicious code or whatever. Um, so yeah, there's a I don't know if they have security, you might be able to enable it and set up, but by default didn't have any and that was too easy.

We're in like Flynn but I can't read any of that github blah blah blah blah blah github page configure. Okay Oh Control: Let's just go into control I Want to make it do something? Geez, that's too small by default. Let me. yeah, let me flip that around, can I? Yeah, it's a bit annoying anyway.

Oh What is Imperial March Is that gonna do thee? There's all the codes for it. How do we execute? Execute. Okay, so we've added all these to the queue so it's presumably gonna be the do the Star Wars Imperial March. So let's just send Q it's turning, it works and I might have to get the mic really close to actually get the sound of that.

And if you go to the configure here, the only thing you can figure is to join a network. That's it. and it will. Yes, you can get this motor to actually connect to a network, but yeah, that's it.

So not exactly blown away by that. That's incredibly simplistic. control like it doesn't even have, you know, like a turnleft turnright button or anything like that. It's just got a cube a system which is okay, you know, in its own right and powerful and everything like that.
But yeah, it's a Wi-Fi connected motor. Okay, and that's exactly what you'd expect inside a Wi-Fi connected motor. We've got our Wi-Fi module and our motor controller on the bottom there and that's an A 59 84 for those playing along at home. Not much else on there at all, but you wouldn't expect it.

Next up, one from Germany Hi to my German viewers. this one's from our Sebastian goat get um from Berlin I've been to Berlin Let's crack it open Oh Give you a little bit of a spoiler. contains old stuff. Beauty.

We like old stuff here on the Ev1 I think that's it I'll swag a stuff wow I can't even look at it all here I'll then cheer some of them. some of them are tubes. Whoo! I Like that little Center zero meter. tons of stuff.

Let's check it out. Well, it looks like we have the old component Bonanza Look at this. I Can't possibly do justice to every one of these parts. So yeah, maybe I'll go through them just quick and highlight a few oddball ones.

Maybe Oh hi. check out all these old chips of that huge Texas Instruments ceramic package. Look at this the TMS 109 9s C3. Apparently this it will decode 22nd week 1979 but apparently a dates are before that.

This is a support chip which was used on the evaluation boards apparently for the TMS 1000 series processors. so very interpret. look at that beast. Don't make ceramic packages like that anymore.

NEC job' sprog a couple of sprog ease and oh what's that photosensitive package? tears lard? No. I don't think that's Tesla the car Company but God sup. what on earth is that at no clue what that is? Look at that package. What the are? they like high tension wires in there? It's in a standard dip package.

Ah, here we go. I decode. What is it? No, that may not tell us much. So is that like some sort of display? umm and designed to put multiple ones side by side? plug them into a board? Umm yeah, some sort of vacuum fluorescent display thing.

Hmm. And here we've got some sort of camera to by Google the number and I get a radio museum that entry that just identifies it as a camera tube. some sort of I don't know photo multiplier tube or something. I'm not sure.

F 2.5 m31 be for those playing log at home. Hmm. love the nipple. Oh okay.

what is that I don't know I don't know anyone. anyone with a clue what that puppies doing I eat Hmm. and this thing is interesting. It's got a frequency on it.

This that seven-point-eight met just over 7.8 meg. and it's got. Is it some sort of resonator? Some sort of a, you know, it's not cool. Don't think it's a quartz? Is it likable? That is weird.

Has anyone seen anything like that before? Check that out. What is that? Is it? Some sort of quartz crystal kind of thing? I don't know I Love this old school Center Zero me to look at that. and what does that do? One degree equals four times 10 to the minus 6. So 4 micro amps? Um, one degree.
does that mean like one Marca division or what? Or is that lines up with the 10? Or is it actual degrees of movement from the center? Um, I'm not sure. but yeah it's I Just love old school meters. Very nice. Now here's something more familiar.

This is a quartz crystal. Um, most definitely because you open up a modern you know? HC 49 you and you're going to find very, very similar to this, um, physically inside the circular discs like that with the pads either side on the on the quartz. A substrate like that. So that is definitely hey.

um what frequency? 204 8 What? Hmm. Anyway, that's definitely a quartz crystal in a tube. This unusual looking thing is some sort of filter. by the sounds of it, a band filter.

There you go. So yet some sort of a bandpass field of mechanical bandpass filter presumably. Hmm. we've got yet another band filter.

Look at this. This one's even more interesting in that physically on the other side look, we've got like a Trent like almost like a standard transistor type metal can package to one at either end mounted either end of that can. so that is fascinating. but unfortunately to get that open I'd really have to work.

You know, get the Dremel out and it to be really messy. It's not for mailbag and once again, some sort of photo tube type thing. If anyone has any idea like you know where I died I know I'll just throw out the generic term, some sort of photomultiplier tube or something like that, perhaps. Hmm.

And then we've got another little La bonanza of our filters and old-school stuff here. Once again, we've got another one of those packages. more old-school There you go, we've got the old lens on the top of the metal can trick and is another job' down there which is going to be photosensitive and don't know what that is anyone. Buell Buell What on earth is that? Look, this thing moves in there like that I Can only presume it's some sort of mechanical vibrator.

It might be some sort of you know mechanical filter or something like that. Hmm. since we have some swag. Um, who is Afra Ephra? - Berlin Jewish Uhm Hackerspace? is it I Don't know.

what on earth is that? I've got no a VCF be dot de aha. that is the Vintage Computing Festival of Berlin I Would love to go to that. Awesome! And of course it's the spectrum and what else we got. We've got some stickers.

Caution: Device contains atoms and is a tiny bit radioactive and a whole bunch of made in China stickers. Oh no way. Geez, a plug in everything. reboot your universe at Sea Bass dot Org.

Wow that what is that? Almost like it's some sort of bridge rectifier. Um yes. silk. It's not selenium rectifier is it? Hmm.
Whoa. Ford branded thank you very much from Philco Ford Corporation Microwave Department Micro Electronics Division Eastern Operation and we have that looks like some diodes microwave diodes Wow in their original packet. Beauty. Okay, what does that? I don't understand what this thing is I Is this something in there that we need to wear? Oh yes.

Oh look, it's a carrier to carrier for some RF our transistors or RF Arm Amps Beauty. Check it out. You can see the ceramic package there which is the purple bit and the four leads coming out. These are classic armed RF transistor or amplifiers in a package and you just solders.

basically are surface mount these directly down to the board. Very nice. Usually you'll have a little like cutout little hole cut out for the for the main package itself and then the four leads just go off to our controlled impedance are traces of course. Thank you very much and that looks for all the world like some sort of CD s photocell.

Perhaps like a big-ass one. I Don't think I've ever seen one that big. Wow Okay, what is that? What on earth is that? My first guess on that would be some sort of like programmable matrix plug or something. Perhaps if you ripped all that stuff out, maybe you'd find some interconnects in there.

But as far as some sort of active stuff being in there, I I doubt it. 200 mega resistor thank you very much. Doesn't that look beautiful? Ah, it's a work of art. Got more random stuff here.

Look very old. Is that Phil is that? it wouldn't be. Philbrick What it? Um, door. Is it an early Philips or something? I don't know.

I carrier for a Um. there's a number on the back for those playing along at home. 1978 in their original were ceramic packages, so some sort of chip and oh, there's a some sort of photocell again another one. Classic.

Who makes them? Yeah. I'd Hymen Hmm, ya know, well used it lots. Not so. Thank you very much for that absolute bonanza of old parts.

Absolutely fascinating. Wow, what a score. Next up: one from Strongly Up Beauty this one's from PD Miller from Sellers Burying Queensland I Don't want my Bloody Queensland viewers Ah Bloody! Queenslanders that's what we call ya and wrapped in electrical tape? That's it. It's just completely mangled - it's like ID Unbelievable.

Anyway, street cred to the electrical tape right. doesn't look the shape. It looks very industrial. It's a Crompton um digital analyzer like one of those industrial panel mount digital analyzer is from a very large mains main switchboard that just faded away and stopped working.

So it's dead as 1998 vintage. and let's crack it open for a two minute teardown. So this is a power analyzer. apparently measures our volts adds power factor, all that sort of jazz and uh, reports back.

let's tear it down and meeting the old dart - thank you very much. Screw that and we're in life. Flynn Multi Border Cube construction their ribbon cable going off to our Oh touch button e things on the front so we'll rip that out and fairly typical construction. Oh, that's been somebody's hand soldered that puppy.
Something's gone wrong there. What they change, the transformer. Is that how sloppy it was? These didn't clean it when they manufactured it anyway? Um, looks like we've got some current since Transformers in there. Do we three of them? because it's three-phase Is it Aa to-220 with a heatsink flapping around in the breeze? It's pretty how you doing old school Siemens ATC Five one, seven in a PLC C sucker.

thank you very much. So they're just mixed in the old-school through-hole stuff. There's the ROM for it down there and does it Nice square prom or something. maybe I don't know.

I can't make it out Raytheon? No. what's that? Anyway, they mix that with the surface mount, control it down the bottom for the LCD and that may not be made by them. Dead giveaway. You know the PCB is a different color, different manufacturer, everything else so that maybe I don't know some sort of off-the-shelf Er module they build it around or decided to for had it designed for them.

or maybe another group actually designed the LCD. But yeah, to be common to farm that sort of thing out because you know, going for a low price point for this thing. So just using off-the-shelf display solution from somebody else and that looks like it would be data vision. Next up, one from neutral Switzerland thank you very much.

Pascal Stadler and it contains defect electronic Oh however you pronounce it in for spell it, say it in that Swiss I Don't know, we've got some more busted stuff people like to. What are the interesting things about Mailbag is the great differences in packaging style or G's alike though? Is there? Those are rugged dumb lifts buttons? You know, like industrial type buttons to be used by the public that war. I Got this as a calculator. Um, that it's not a fall banger and these are like you know, like ten million operations or something insane.

Uh uh Troy you Casio Fanboys Oh it is a bloody for bang I didn't look like a four banger but it is on. still works. Course it does. but lots of four-banger Anyway, two minute teardown.

Nice. we got. What on earth is that t io work? it's a TI for all u TI Fanboys I know you're out there. it's a TI 74 I just didn't recognize the someone's put their own custom plate on there Wow The Ti 74 basic calc Wow Brilliant wonder if it still works as a powerup? Nope.

Oh, I've got our run cartridge and everything. Ah terrific. So that is brilliant teardown material. I've never actually seen one before.

that's a protective case I guess you don't have to have that, but oh yeah, for trip waste, not in there. but we'll try and power this puppy up. Serial number thank you very much. 5112 Wow, that's all in 1985 each.
Wow, that's a Bobby Dazzler Casio Hecho 121 Thank you very much. Oh look at that. Oh, but still works as do all these Cassio's back in the day but if I had scientific I don't want to know about it as a kid I Was always fascinated by how I Casio always put like the power consumption in Watts with decimal points on there afterwards and that's like oh well, that's so incredibly low. Like, you know, like I didn't really understand like you know microwatts back then when I was like eight or something like that.

But I thought, you know that was just a ridiculously low because you know I'm familiar with like a hundred watt light bulb and stuff like that. But yeah, for 50 micro watts, thank you very much. Single sided. like phenolic type base, not this fancy pantsy expensive.

double-sided you know, high-quality fiberglass rubbish? No siree. Bob But there we go. Now the interesting thing about this is that it is actually a double sided board so to speak. but it's not on both sides, hence why we You can't really call it double sided.

It's a single sided board, but its dual layer. You'll notice that the jumpers on here it was easier to them for them to do a separate layer on there than to drill the holes and have plated through holes and everything else. They just put them on there and as a separate process, made our contacts and then bridge them over solder, mask them and then bridge them over again with another bit of copper. I'm not sure the exact you know process manufacturing process of how they do that, but you they just jump him over like that and it must have been cheaper than plated through holes at the time.

And Pascal actually got these from his teacher in this classic TI 74 Hi hands up if you had one of these babies. the basic calc. Um, yes, it got a classic Erb like school nameplate on there. Oh Lulu You look at that and with a handy reference chart.

thank you very much. Doesn't still work after all The she is. ah, you bet your ass it still works. Look at that.

the single line display. How many characters is that? Like who are Twenty Four thirty? You can just switch it between basic mode and calculate a mode. And of course, in basic mode, you can just put commands directly in and run a program. Easy.

So I've just entered a short program here. List: Can we go down? Yep. print C next C and let's run it. Shall we? There we go.

Whoa. Look at it. Go the speed. Hold on to your hat.

So this puppy came out in 1985 and had 32 K of ROM 8k of RAM we and that was in this pack doesn't tell you well. it's presumably an expansion pack, but doesn't actually tell you what size this puppy has. Anyway, this was a bit of a beast back in the day and that's a seriously low serial number - Wow 5,000 odd and well look at that all through whole thank you very much. TMS are 70 C 46 processor 1985 There you go And where's our oh there's our rent.
Yeah, we've got some ramp and that's a that'll be custom built in ROM Of course you've got a seven double 600 voltage inverter there. that's for our contrast pot. That's all for the LCD but Wow Oh through-hole old-school Love it. So that's I think.

Really a sharp contrast to the no pun intended the the Sharps and the Cassio's the little pocket computers of the day back then because they are all running surface mount. This one is like here, just completely old-school Haven't put any effort into getting this thing down at all. that's why the things so damn thick. but I guess they didn't care these wanted to get something out.

so thank you very much. Pascal That's a beautiful bit of old-school classic pocket computer. Nineteen mid 80s vintage. Wow Love it.

We've got ourselves a second thus over here. I lived it. I think I'm pronouncing it correctly. maybe I'm it was on a previous mailbag not that long ago.

Uh, Nifty's from the old dark as in KN I V capital D Anyway, I from the old dart from Hatton Garden Wow that's I'm Hatton Garden Art robbery that was absolutely fantastic I would love to have been, but yeah, I and don't think I steal people's stuff but you know, just from half. Um, actually, you know I love heists and stuff like that and I especially love heist movies. They've just turned it into a movie and it's um, it's out. Apparently it's some.

yeah, it's all. It's just released a trailer or something like that. and yeah, definitely worth a what? Watch a bunch of older old codgers, um, abseil down a lift? well and everything is, is that? That's is cool? Anyway, awesome and we get we've got more of these um, proto board thing guys we saw last time so we've looked at these are router boards closely are previously and well, we don't need to go over. McGann They're like an Fpga interconnecting type matrix proto board.

Quite neat and this is the upgraded version with feedback from the proof from the Kickstarter campaign backers and the people who commented previously. So there you go. clink it in down below. Swedish Post time.

hide all my Swedish viewers like the steps. very nice. this one's from Daniel Jensen Care of varied a website. Use your channel, not chalk.

Let's check it out. We've got any, um, any static static shielding. sorry static shield eBay for our protection. so there's obviously electronics in here.

Esteemed Mr.. Jones Thank you very much. Um then you okay? Switch and Lever comm. hence their little logo which is a switch and lever.

Cool. Anyway, um I'll show you why I Pull here. Pull here. It's gotta come out the right way.

Oh it's it's old school I thought it was something. um I just assumed it was something new. Got ourselves another calculator. by the looks of it, hell is that.

Oh there we go. Oh Another four-banger A huge and it works. It works. a Huge and A professional calculator.
Wow Does square root one on a table in yes, where's that from? Wow Is that Swedish point Two Watts heads roars Oh Classic Timmy To tear down and this puppy comes from the kingdom of Sweden Fantastic! We haven't had a I don't think we've had a Swedish calculator on here before and let's switch it on. Oh look that greeny goodness. Fantastic! Oh look, hang on. we could do pie.

Look at this. Ah pie. Wow and look. we can get square root of Pi.

Come on. no. oh sorry dude. operator error and if we get it back we can square it.

Wow What can't this thing do? Look at this. Yes, we have nipply goodness. There it is. Aha and what we're in like Flynn beauty.

So there's not much in there but an NEC chipset. ha. that resistor network and pull-up resistor network. Thank you very much.

and that would be for the keyboard and a little transformer there for a getting our high voltage required for our vacuum fluorescent display. so thank you very much. Daniel from switch and lever dot-com serial number for those play along at home at 3 volts. Only point to what's ah bugger that TI job.

Jeez, this is a professional model. Got one from Deutsche Post and from yes it does have a name I'm a Marcell through Ma thank you very much Marcel Let's uh easy open pull tap. only the fine. Yet another easy open night.

Wow, what do we got? That's a long pause? Oh that looks like a Microsoft Kinect is it I I don't I've never seen inside a Microsoft Kinect but that kind of looks like down it doesn't have two eyes or no. Am I mistaken? I should read the funny note shouldn't I Um no open door from a geek from DS and one defective ebook reader. Oh, we have a defective ebook reader Wow What book in booking does ever you want anyone remember a booking? I bet you they're out of business designing France French The book leap. let me read up.

um and a couple of blank bullets. Let's check it out. Okay, so this is not a Microsoft Kinect I Was totally mistaken. It's got some bodge wires on it.

There's two sets of lenses here, so it's some sort of stereoscopic vision e-type thing. Oh okay, no, there's an emitter. Okay, so it's an IR emitter and presumably and receiver. Ah, so this thing looked all fancy pantsy with as big lenses on there you thought I was doing some big you know, stereoscopic you know viewing thing.

But nope, it's just a door opener from a German company called G's um, and there's that. We don't even have to take it apart cuz there is the board inside this thing and that's it. It's just got an infrared transmitter and receiver and Bob's your uncle? Just an automatic door opener. Oh, so that's the emitter.

and check out the receiver over here. We can adjust the position of the receiver. thank you very much for a presumably a certain distance. Well, there's a bit of a surprise directly behind the lenses there, since directly embedded under the PCB.
That's the most interesting thing about this. I didn't expect that I Thought you know there'd be some sort of a middle can package or something behind there and this poor old Sci book Odyssey is still updated. Um, yeah, that dudes going to be sitting on that park bench for awhile I think And because that's the thing about Eing displays, they stay permanently at their last display. They don't require any power.

Did anyone have one of these things? The boogying design in France made in China that came apart disturbingly easy. Um, dear yeah. not sure what's going on there anyway. Um, I think the battery's gone I can't see the battery I think it was up here and trust me, it's nothing in the case.

Yeah, look, yep, you can see where it's been ripped out of the top there by the looks of it. But yeah, fair bit. Engineering's going into this thing it's designed in France Obviously, it's actually quite nice. 2012 Wow 2012 That's pretty recent.

Jeez, there you go Anyway, is that our sole failed Wi-Fi chipset down there and we got our source a microSD card have we? and USB And that's about all she wrote. I Like the angled angle connector like that is coming up at the side. thank you very much. None of this straight, you know, 90 degree rubbish.

They got that to an almost single sided load except for the poor old tactile switches on the bottom here. Oh, what a bummer. and that's a TI OMAP for those playing along at home. Geez, look at all the bypass in.

tons of it. None of this bypassing on the bottom rubbish for your BGA No sirree. Bob Just stick it out to the side. Don't worry about those massive inductive connections going over there.

just work them all on the outside. She'll be right. that's a bit. Yeah, that's a bit how you doing.

Um, there's gotta be a point where that becomes like pointless. You've got to have them directly on the back. Well, it would be under there if them, but there's nothing under there. trust me.

And they've just whacked them in a line because that looks nice. Um, with name signal integrity. Hmm yeah, that's not the best of bypass layout. I've seen.

let me tell you. I'm mmm they should have been on the bottom. and considering that they double-sided lobe with those switches anyway, so yeah, not sure what's going on there. that's a bit how you doing so that's almost as if like the schematic designer knew what though I The design I knew what they were doing.

You know they specified. If you have a close look at these cats here, you'll see that they're different types and they'll be different values. Of course you know they might be one Mike hundred n ten in one end. Something like that.

You know? if you go, look at the the implementation and note the data sheet for the Oh mate processor, they probably tell you a typical bypass configuration might be three different value caps. I've done a video on this explaining why that's the case, why you have different value weigh caps in parallel. so I won't go over that again. But what? They put that on the schematic and then the PCB layout person just went.
Hmm. I Just just whack them all in a nice neat row on the outside that'll pass the design review meeting. It looks nice and neat. Um, when really they should.

You should be putting them as close as possible, underneath the chip, directly onto the power pins, even sacrificing the required number of caps just to fit them on the bottom, because once you move them out here, they loses their effectiveness somewhat. It's you know, the inductance of the traces going under to the power pins. This would all be power play and under here this would be a, you know, I would it be a four or six layer board? You know, something like that. But yeah, it's just no, don't get many envelopes so let's check it out from ah never nobody so there's something.

It's not just a postcard I feel something in a well it is a postcard from Palm Cove in Cannes so it's a local job' and been do um yes I've been to Palm Cove sure have. Oh and we have a patch. the South African National Antarctic exhibition exhibition expedition patch. there's lovely Palm Cove in Cannes and this is from hearty Pilar hmm Anyway, what's the answer to this question? I think it has an important meaning for life I So want to go to the Antarctic I'm totally jealous that he's definitely on my bucket list.

So there you go. I Hope you enjoy today's mail bag. If you did, please give it a big thumbs up. I'm sorry if there were any audio or video issues in here.

My stupid Canon HfG 30 camera has just the backup battery wherever that is in, it has completely died in the arse and all my camera settings which I normally have it all set up. you know the white balance, the audio and everything else. even you know the recording format and all sorts, a focus settings, and all sorts of stuff. No, that was just entirely all just reset from scratch.

So and yeah, I had to use an auto mic and I left it on bloody. Don't let me complain about video blogging anyway. Maybe give it a thumbs down cuz I'm not very professional. Hmm.

catch you next time. And next up we have one from Luke Stone in Wangaratta which is in Victoria Australia all windows offset Ellie's again back boy lost the show sagging roof. it's a green button look.

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19 thoughts on “Eevblog #936 – mailbag”
  1. Avataaar/Circle Created with python_avatars Nic Most says:

    42 volt i think??????????????? regards

  2. Avataaar/Circle Created with python_avatars Autotrope says:

    that's not a knife

  3. Avataaar/Circle Created with python_avatars Barry Manock says:

    I want that knife 😁

  4. Avataaar/Circle Created with python_avatars statinskill says:

    Just so you know that Radio AG DS Loewe in Berlin-Steglitz was founded in 1923 and the brand exists to this day 97 years later. They make high-end expensive TVs, audio products etc. nowadays. Germany pioneered television. That tube you're holding may well have had Adolf Hitler's live words pass through it within nanoseconds of the moment they were spoken in Nuremberg. My grandfather was in the party, he was heavily involved in bringing television and radios to the masses.

  5. Avataaar/Circle Created with python_avatars aly nicholls says:

    i have been using some soviet era parts in some older metal detector designs recently, one used was LF357s, since all the china ones are fake, and german new old stock is silly money, i used mil spec metal can soviet ones, and they worked great.
    this particular chip has no modern alternative(in this application), the specific chip has to be used.

  6. Avataaar/Circle Created with python_avatars Stan Burton says:

    To be fair, in the case of the dead e-book reader, the clock speed of the device is probably low enough that the decoupling isnt as critical as it might have been if it were higher, also if the ground plane is close to the signal plane (thin inter-layer insulation) the ground plane itself will act as a makeshift decoupling cap too.

  7. Avataaar/Circle Created with python_avatars therugburnz says:

    Stream of thought question starting……now.

    I wonder how much gold is in a decade of Mailbag. If there was a non-polluting way to extract and separate the metals, we could find out.
    Antimony
    Beryllium
    Cadmium
    More valued metals like silver,gold,platinum,copper
    Baddies like lead, mercury, neodymium


    and zink. Whew !
    I do wonder how much pollution can either not be made or captured and then reused. I'm just curious.
    Crush&burn then chemical? Powder&chemical then smelt then electroplating? I'm not a chemist&smelter or furnace operating high heat electro-separator re-depositing engineer. Duh
    I am curious however. People with PooTube channels do crap like that all the time an the small scale right now, also those old boards and components had waaaaaay thicker(more) plating. Someone do it big !?!?
    Cody?
    Nile?
    Crazy Ru….. ? No no no no no not you ! Duh .
    Thunderfoot? Tell us you proved it to energy inefficient and toxic .
    China? No not…… you did it already didn't you? Nevermind !

  8. Avataaar/Circle Created with python_avatars horiamorariu says:

    Hi. The Band Pass Filters are the electro-mechanical ones used 3 decades ago in transceivers. Cheers.

  9. Avataaar/Circle Created with python_avatars jimmyturpin says:

    That camera tube looks like a vidicon image tube from an old Motorola security camera from the 70's, although they were probably used in other cameras too. They were notorious about getting burn in images and had to be replaced every couple of years or so.

  10. Avataaar/Circle Created with python_avatars Markiss Boi says:

    ❓📣Warning many Rogue Robot's 🤖 WIFI Vacuum cleaners have been hacked & pissed off down the street Last seen
    cleaning the city's streets & laneways 🤪👉🤵 dam u council 🐱‍💻 hackers 🙂 IF u see My 😾🐱🙀 Ginger Cat Riding a robot vacuum please call OOO asap Reward 💲2fiddy thats $2 dolla & 50 cents lol 🐌💬wot?

  11. Avataaar/Circle Created with python_avatars unamanged615 says:

    Fuji Minitron 3015F 7 Segment Incandescent Display

  12. Avataaar/Circle Created with python_avatars Steve Hodge says:

    The component with the matrix of red dots is an AEG diode matrix used for driving a 7-segment display.

  13. Avataaar/Circle Created with python_avatars xephorce says:

    now thats a Knife

  14. Avataaar/Circle Created with python_avatars pincopallonetto says:

    Love your Crocodile Dundee style knife ! 😀

  15. Avataaar/Circle Created with python_avatars mrlithium says:

    Funny that the Pi on that old calc was off by 2. Sad

  16. Avataaar/Circle Created with python_avatars Mark Chas says:

    There is no language called Swiss. They speak German, French, Italian and Romansh depending where they live.

  17. Avataaar/Circle Created with python_avatars GalaxyCat says:

    I'm eating my heart out right now because of the it calc bruh you need to put a copy of the rom image on the internet (can't find them ) so I can use a emulator

  18. Avataaar/Circle Created with python_avatars wernertrptube says:

    SEL German rectifier:  gleich-riecht-er.  soon he smells.  when he dies

  19. Avataaar/Circle Created with python_avatars Coco Sloan says:

    Well nice to hear that you love heists…I got a nice game for you that you can do heists in 3d on computer.Download "Payday2" (game from STEAM) Try the demo and if you like it you can buy the game later on… I promise you -you will be nicely surprised with it…(I got nothing to do with STEAM or the game-i'm just a guy playing it)

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