Hi welcome to everyone's favorite segment Mailbag I'm gonna try something a bit different today. I'm gonna call it Mailbag Extreme Why not? where I take a maximum of two minutes or thereabouts, you know. Rule of thumb: a per item, nothing more. Doesn't matter how good it is, how interesting it is.

I'll try and do it at maximum two minutes. So please let me know what you think in the comments on the forum wherever about this new format, whether you like it or not and whether or not I should stick with it. Let's go go on from David's Tintin in Maroochydore in Queensland see big industrial thing that the front falls off cool Johnson Controls Variable Speed Drive beauty So Dave got this Johnson Controls / Eaton variable frequency drive from a local cafe Wow looks a bit crusty down in there. Let's take a look inside.

Wow Check out how easy access that is. Whoa! Got ourselves a nap mill down in there for the Atmel fanboys. not sure what app Mel part that is Vacon Vc a 9mm. anyone know Custom Job Ii? maybe Motorola 6800, blah blah micro and I'd like this interface card designed.

just these modules. plug-in out like that. very nice. and then whole module just unscrews and connects via a big D connector here down to the main Vft.

Nice. And there's the VFD drive circuitry. old-fashioned relay and looks like we've got ourselves a ceramic thin film resistant at work. Very nice and our main power semiconductor must be under there.

Wow Check it out! Thoroughly, impressive construction. This goes to this big connecting block down here. goes to gold flush pads on the bottom. Massive.

Our bolts going through here down - are they - Huge caps. And here's the VFD drive. a hybrid made by SEMICON There's the part number for those playing along at home and it's gooped. It's grouped, but are there it is.

look that beautiful. So there's our individual die down in there. Presumably they would be. Maybe look at that matched pair there and match characteristics, but they probably compensate for the characteristics to get the most efficiency.

They compensate for it in the firmware, so that's a common technique in these VFD drives to get the most efficiency. Wow Look at that and the rest of its just some big-ass inductors. Awesome! Thanks Dave And for all you reefer cap fanboys there you go. Next up, one from Charles Mangan and he's from on Tralee in North Carolina Hot or go to Walmart North Carolina and viewers.

Oh, here we go this: Oh Krusty Burger But Wow Simpson Two Six Nine Beautiful. Check it out. 100% grade-a from the 1980s. One of these electromagnetic field protection devices.

Stick it on your computer and it'll save you from these evil electro, evil, harmful A.m. radiation. The equal? Unbelievable. Yep.

child suspects they're just blocks of resin with adhesive on the back. Yep. Sold to Suckers. Isn't this cute? A vintage Apple Macintosh thing for your eye watch I Don't have an eye watch, but yeah, you can just slip it in there and you can have the charging dock in the back.

Neat! Oh look at this Beautiful! Simpson Two Six Nine hundred K ohms per volt. Unbelievably sensitive as ultra high sensitivity volt own micro air Me to look at 16 micro amps full-scale Thank you very much for playing just this knob here. It's a little bit crusty, but it allows you to change the Rangers Ah, Gorgeous 1600 or 4000 volts thank you very much. Unfortunately, it looks like that needle is needle is stuck.

that's actually real glass. real glass front on that. Beautiful. Thank you very much.

Charles Those two millimeter banana jacks completely dinky, but that's what they had. It had output function thank you very much which is not actually output. it's actually an AC coupled input go figure and 16 amps and you bet it's got that vintage electronics smell. Next up, one from Daniel Stein he's from Pennsylvania in the US right? All my Pennsylvania viewers.

Let's have a look. I Think this may have been sent in before I Think it may be a second suck of the south? Let's have a look. Oh Bunch of candy and stuff. thank you.

but oh no, this is I Thought it was new I thought it was. It's one of these um thingamabobs I've seen actually quite a few people have these. It's like a combination pan of ice and grip thing. I've got one of these grip things.

Um, which is yes. the check out our other products. the universal arm. the third hand there.

this is the feather hand it's called awesome Wow this Bobby Dazzler and this is the pana hand for 55 bucks not including the pan of ice. by the way. this is a genuine pan of ice which of course articulates that way that way. and the jaws come in and out.

but it's designed. You just get the base here with all the arms and everything else looked a little like fume Extractor USB fume extractor fan. You can just put over your work like that. Fantastic.

And all these crocodile clips. Look at them Fantastic on these. all articulating bindi arms designed to mount on a regular pan of ice base. like that.

Terrific concept. Great example of a killer niche product. and they make our smaller ones as well. just tiny little two ones like this which you can remove this yellow mount for a suction thing under there.

You can also use it as suction. so great little devices from hobby Creek I'll link them in and down below if you want one of these puppies. Very very nice. Oh yeah, baby can play with that all day.

I've even got some Lube Gotta have Lube Next up one from my good mate and yours Christopher J Gamal None other than the co-host of the Air power. Let's see what set t-shirts these are no debt are these Chris's design. Once a night part? I Oh he's sending me bloody Merch forever. The salesman what a company man.

good on you Chris Next up one from David Dave Seaford Thank you very much Dave From Hot Glass Products in Cypress in Texas I Don't want my Texan viewers so let's crack this open I Think we might have a bit of competition through our previous. it's complicated. Here we go. it's another.

It's the Works works. There you go. Awesome! Let's have a quick look and not to be outdone from bench works, we've got ourselves this puppy. I Won't go to the effort to assemble that you can obviously see what it's going to look like here.

and these are sliding things here which have presumably they look like one point six millimeter spaces so designed to hold your PCB and you can just flip it upside down. It's got the rubber feet on either end so you can flip it work. double-sided mount, everything like that. Plenty of clearance.

very nice. Ah, but you'd have to angle it yourself though. I Don't think it's angle a ball. So yeah, apart from that, very handy just for purpose design for PCB manufacture and that goes for about eighty US dollars.

that's worth every cent. It's gotten nicely. blue anodized. Beautiful.

I love the blue in that and very handy. These can angle in of course and you can even do like circular boards and everything like that. So yeah, very handy. Worth its weight in gold.

I think I'm gonna like this mail bag it comes from a Swiss Micro is a Gmbh that's a Germany but it comes from Switzerland So I don't want my Swiss viewers. Let's check it out. I think I'm really going to like this I might even put this as the second video. Hello David! Here are some of my calculators which are clones of the famous HP machine see my website at Swiss Micros dot to calculate a bonanza.

Oh oh, look at that beautiful which ones that there's a dam for. Ah, these are clones of the original. HP's like you know HP 15 see in the famous landscape form factor. It's like there's like 10 of them.

Look at this. It's a replica of the HP 15 see basically. but it's got a dot matrix display. It's even got the stuff on the back.

look at that from Swiss Micro serial number 497. Not surprised he sold this many of them. Absolutely beautiful and if you were a fanboy of the 16 see, you can have you 16 see with all your you know, your computer, your computer science fanboys out there. and if you're not happy with that I Believe this one is the 41.

the HP 41 C and it replicates that in the Voyager landscape format. And if you're getting excited over that, you'll be even more excited as I was. Look at this a pocket version of each one of them. Oh oh, that is pornographic.

Wow that is just stunning. Absolutely stunning. It looks like it's got USB interface - is it rechargeable? I'm not sure anyway. I'll link in the details.

just go buy one. Seriously. Oh Street cred on one of these babies when you whip it out of your pocket. This one's from Nevel nobody from Kings Thorpe in Australia So good on your nerve.

Some people like to remain anonymous. It's not never, it's Nigel I Love all your videos of just a hobbyist. Keeps me inspired. thank you very much.

he's been decommissioning. Ihdn lions are! we've got ourselves a Casio boss and I decommissioned our ISDN line thing. I'm a Bob and Nigel sending this iced tea in a modem eliding interface thing I Never had the iced tea and it was always a business type thing. That's completely unacceptable of course, but that's all there is to it.

I stand line interface modem II thing if that's the right word. Yeah. I'm gonna organize my system like a boss. The business organized a scheduling system.

Hands up. If you had the SF 7500 and you were the boss. Yeah. Beautiful.

It's even got a calculator and four-banger bit kiddies. This is what people used to have before they had smart phones in the internet. used to have to keep all your diary and everything else. Telephone numbers, business cards, and everything else all in here.

Alarms did everything. another one from Nevel nobody from Austria Hi to all my Austrian viewers Garmin GPS And chocolates. They look like chocolates. They smell like chocolates.

Rainy is sending this Garmin GPS Edge 800 computer that you would plug on two bikes and up if you had one of these puppies. Here you go, this would have been the Ducks guts in the back in the day. There are no kangaroos in Austria Oh, we certainly have them in Australia Yeah, there are you run over them. In fact, I'll insert a video clip of a kangaroo hopping across a racecourse here.

There he go. Fun for the whole family. obviously involved in the exit. Cleaned it up pretty quickly.

Oh look, if there's some repaint the top of the mountain Jonathan by car. Somehow they all avoided that kangaroo at the top of the hill we've seen still works on copyright 2013 This is pretty new. Look at this. Apparently the touchscreen he's saying doesn't work that well anymore.

what would be the cause of that? And he's saying that over time the buttons degrade. This is a resistive touchscreen. I Think it just needs a calibration. Usually you get like a touch screen calibration inside these things I Can't get back out Oh Bummer.

but that's maybe that's what. All and that's all it is is needs a touch screen of recalibration. You used to have to do that back in the day. Oh, he actually says this is a touch screen calibration routine, but it doesn't do any good anymore.

I Guess it just something's happened to it. It's drifted over time. That'd be my guess. Um, GPS is aren't that interesting inside unfortunately? Next up one from Portugal from Paulo Elmina, thank you very much Paulo I Don't want my Portuguese viewers but I think Portugal's not in the top ten YouTube that's all they give me stats on.

So I don't know what are we got? lots of paperwork Generalized Electric Vehicle Control Unit Volume Electric Vehicle Bumps there you go, sweet and this Paulo Happy smiling in his lab. They're fantastic and he's developed this. ECU So it's an Arduino duo based model and look at the isolation down there. very nice look at that.

Ooh split right down and I big at mill process on the bottom getting plenty of that melted a and looks like there's a little wireless module on there and that is flapping in the breeze. but it does have some mounting holes there, they're just not fitted on this one and big chunky automotive style connect it. Very nice. It won't pretend to know anything about ECU's or anything like that, but I'll link it in if you want to check out Paulo's ECU unit.

Fantastic! and he has a question here I Can answer quickly. it's about the copper fill on PCBs he is coppaFeel on the top layer is VCC and bottom line is ground. This makes the design so much easier, but I've heard I Haven't seen anyone else do this. Um, yes, of course you would do this yours as a double-sided board, so no worries.

In fact, that's a very common to flood fill the top and use that as the positive de facto standard. The top would be the positive rail and the bottom would be the negative down there. That is very common. Can't believe you haven't seen anyone do that.

But if you did that on a four layer board, that'd be entirely different. On a four layer board, you'd use the two inner layers for your ground and your power and you'd use the outer layers for your signal wires. That increases the plane capacitance between the two so you get distributed a little bit of distributed decoupling anyway in there. Plus, of course you cannot route the traces on the top with the surface mount parts and you can access them and hack them and mod them and everything else.

But know that is a perfectly standard layout technique. You've done there, no worries. and look at the manual here, so it goes in a big case. He's just doing the board and things like that, but this looks pretty damn comprehensive.

So if you're whoa, So if you're in the market for a ECU's for an electric car or what have you, then that by all means check it out. Wow Whoo! Throttle Maps! Hmm. actually presumably that's the software that comes with it and that looks very Jersey's got schematics in there and everything else. Wow I got ourselves a four watt power brick there that's pretty beefy Ferrar just a little Wi-Fi module and a micro.

Hmm. maybe you need to power something from the Usb. I've got one from the old darts from once again, never nobody. so one.

I remain anonymous. this one use it's got some duct tape on here. Quack? sorry Yes. I know it's not died.

You know there is a duck brand tape though. apparently. So Park home of Danger Mouse London England Okay, what are we going? Oh, we got an old Nokia brick. Geez, that's it.

Well it's not a break. sorry no, that's that's reasonably modern and and auto-reverse anyone who remembers a day what our a was still in business Io AWA I don't know my cassette player. that's cassette tape for you youngsters le and obviously I can't do why. two minute tear downs and all these Nokia is that the 30 was it the three double one over 3100 or whatever I had that back in the day and I think I've actually done a teardown of that puppy before.

We have a fancy pantsy Nokia in 71 a camera fancy pantsy camera in the thing. Well it's a whole megapixel. Fantastic. That was the Ducks guts back in the day.

And this puppy. Oh wow, look at that. That's not a Lithium that feels like a NiCad Yep, Necesaria Nickel Metal Hydride Wow Jeez they're making like that anymore. Extra capacity.

Look at that. Oh, and this baby's got all the mod cons: dynamic super linear base dear cell, they were trying to all one-up themselves back in the day and feather touch mechanism. Ah Dolby Noise reduction state of the art thank you very much. Ah Beautiful! Danny A rock with you cassette tape? No worries.

Obviously haven't got time to two-minute tear down these. but yeah, I'm can we have a moratorium on the phones please? Because I've got like a shelf full of mobile phones I could like a dozen of them to do a big super teardown. I Don't know. let me know if you want to see that like every mobile phone.

I've gotten the bench here in one video I got one from Silicon Labs yes they're back there like this. is there. like full suck of the SAP or something like that. unbelievable little bit of stuff sending stuff all that descended that why couldn't you just whack that you know that will survive just fine on its own.

just work it in a courier pouch or it me. Cute little blue gecko and it's the Blue Gecko module. Wireless starter kit and this is a $99 U.s. Bluetooth starter kit with the Yahiko processor on here.

Ultra ultra low power as we've seen in quite a few previous videos. You get the earring display. You get a little joystick II type our control board and I got two of these, but I think the kit only actually comes with one bluetooth module I'm not sure what the differences are. There are slight differences between those two modules, the triple one and the one one three.

so I guess you'd have to right? check them out. It doesn't actually work off the battery. Usually it does. got the app built-in but if you pair it up, it does actually work.

there. it is. it does something presumably it would by default comes with an app which connects to your phone or does something. Bluetooth II like that.

I'm not gonna try it out now, but I'll link it in down below. For those who want a low-power bluetooth development kit, check out this weird effect. I Just got it to shut down. look if I touch a few of those with my fingers I can make the screen do weird and wonderful things.

hmm strange reset reset hello McFly hmm very strange what's going on I Found a bug so yep, look there. we go see some of the screens lines on the screen he going playing silly buggers, what's going on Wow hmm that's not great. Oh okay, that seems to because I was running it from the battery. Maybe there wasn't just enough juice now.

I've got the USB selected here and it's just fine and dandy. No workers, doesn't seem to do much. mm-hmm the person who sent this one in which I've already opened quite some time back I thought it was a real one out wants to remain and on. Fair enough because it's a client thing.

The nameless person works in the dental industry and is showing a a repaired unit that spins and mixes composite material used in tooth fillings ego. Then it switches to a set of fuge to concentrate the mix to one side. Anyway, it Natalie just bypasses the interlock. Anyway, what is designed is a unique Fixit tool.

Fix anything with that, no worries. I've got one from ebay so it's from Bradley Smith from Elk Grove in California but I have no idea if Bradley is actually a viewer or not because it could have been just something ordered on. eBay Let's have a look post probe. Ah yes, I built my own.

One of these back in the day is a bus post card. Oh I've cut myself the dangers of mailbag. Uh, who can remember these puppies? A post? well a postcard I guess you could call it that displayed a post is that power on self test for is a our IBM pcs back in the day? Various biases like saying am I bias for example might have different error codes when you power the thing up and this can just that. Basically latches the addresses on the bus data and the addresses on the bus and displays a two digit code here.

and this one can just see if the oscillators good and stuff like that, whether and like, the power supplies are good. So this would be a PC diagnostic thing that you just plug in back in the day. and as I said, I did a card like this back in the day but I had like old wires coming out to an external displaying. You could display those boots are power on self test codes.

but yeah, that pretty much went the day of way of the dodo word. You know this one's dated 93 actually, so they're still still doing it well into the mid nineties by the looks of it. and it works with is a either and microchannel who can remember either? and microchannel because they were backward compatible to the ISA bus. There you go.

Oh wow, I Love it. Classic! Who had one of these puppies so that have all these different procedures for HP IBM EFI Micro research Zenith Oh my goodness and all these different biases am I award? and Compaq bias and Phoenix bias and all that sort of stuff. So there you go and chip peanuts. look at that.

Oh those were the days when you actually got pin outs and data sheets in the manuals. Beautiful from Portugal and like a suck of the server at least I think from Samuel Ferrero Marques Norinco you probably know the name if you're a mailbag regular I Think we have one of Samuels clock reference boards. let's go and Samuel send in another one of his low jitter clock boards here. We've seen these before.

It has a super low jitter clock and in this case 0.025 ppm. Pretty decent. It's 600 femtosecond Gina on the thing - 5 megahertz. So there you go.

There's all you do to specs for those playing along at home, and if you want to, I'll link it in. down below. there's his website if you want one of these puppies done for our performance and analysis of this sort of stuff, there we go. Cycle to cycle Gina Histogram Neat.

X like work and I do believe it is open source. Hope we're Yep, there's the gear logo, so if you want a reasonably precise, but more importantly low jitter, ten megahertz reference clock, then that's well worth a look. I Like the little SMD heat sinks down in there, we don't get many from Motor, thank you very much. Ruben's Parente Hi to all my Maltese viewers! Fantastic! And we've got the EE mod from a company called EE Roots.

insert joke here. Love it! Arduino Compatible prototyping platform that integrates me. He senses a blunder. How many senses are here you ask? Look at them all what senses Color senses, proximity, line edge detection Lipo ZigBee Bluetooth Wi-Fi Motor speed sensing accelerometer, gyroscope, light sensors Hmm.

Wow And here it is: Doesn't it look funky? eye? It's like a two board solution here. so this does that pop off? Yep, really stiff headers in there, but doesn't that look all funky? And there's our there's our wireless and Bluetooth Wi-Fi and Bluetooth module. Sarah's going to say that they've got ground plane under that, but no, they've taken it out there and over there as well. so we know Winner chicken dinner and that will be.

That's probably the light sensor down there. It's got all various sensors and it looks kind of spaceship. II It's got all his um, it looks like though these infrared transceivers or they just they look like they look kind of infrared. II Anyway, it's got lots of stuff.

Oh Link it in if you want a Arduino prototyping platform that has a ton of stuff, but it's not like a shield compatible or anything like that. sort of like standalone, so it's a bit unusual. I'm not quite sure what's going on there, but that's presumably the Atmel Isp interface and hold it in your hat. It's supposed to be pre-programmed with a little fleshy thing.

Oh, it was. Oh, here we go off on LED flash. Uh, it's flashing the lid. Oh, that's not terribly exciting.

What about? Damn! thank you very much. Denny Asst Calvert is from Lithuania Awesome! I Told my Lithuanian viewers lovely postcard and this looks interesting. It's a UH This has got to be a TTL Clock Beauty TTL Clock project with up and Dainius is actually from Lithuania So hi to all my Lithuanian viewers and look at this beautiful. It's a it looks like oh yeah 7 4 HC There might be some Maher 4060 stuff in there happenin' some 4000 series CMOS logic but it's a clock and it's assembled in Denmark What a Bobby Dazzler Look at that.

Neat. it's just called the clock. There you go and that's actually a decent layout on there. It's quite dense.

Look at all the look at how dense those chips are and it just rounded it on the double-sided board. done really well to fit that all in there. That's excellent. ER Layout work there I Think there's a schematic for those playing along at home Altium Ah, look at this.

level 312 A-rod bro Road Frenchy's forest. yep, used to work there on level 3. yep in a kima cubicle farm before we move to Bill Rose Anyway, um, you probably can't see any detail on that. I might just scan that in cuz I don't think he has any links at all to any website where there's any information on this.

so be sure to watch. Scan this in and include a PDF let's plug it in. hopefully I've got sent to 0 Yep, look at that. Bobby does look green.

Oh no, we're going for red myself. but anyway. yep, we can do various things I'm sure you have to read the instructions there we go. So there you have it.

The first ever extreme mayo bag. It's not very extreme anyway. it was hopefully much faster pace than a regular mail bag. Leave it in the comments if you like this format or you want me to go back to the existing one where I sort of just pick and choose which ones I do more extensively in the mail bag anyway.

Catch you next time. hi With all the recent to do about clocks I thought I'd show you how to design and build Do It Yourself clock using this example that I built myself back when I was a teenager back in the 1980s. So I thought we'd take it apart, hopefully reverse engineer it a bit because unfortunately I've lost these schematics for this I And here it is: please excuse the crudity of the model I didn't have time to build it to scale, order pain. it.