Mailbag!
Froum: https://www.eevblog.com/forum/blog/eevblog-1410-mailbag/
SPOILERS:
00:00 - Dancom RT403B 25W VHF Marine Transceiver teardown.
09:07 - Workbench of the week, Tony Albus:
https://www.youtube.com/channel/UCwLPcv2xiA3D9lfGArF58ww
TEA: https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/
12:36 - Riedon SSA-100 100A Differential Isolated Current Sensor.
https://riedon.com/
https://www.digikey.com/en/products/detail/riedon/SSA-100/12149327
22:19 - DODGY! Soviet era mains rechargable torch
27:36 - Jon Newcomb's Microcontroller Proto Boards
https://www.ebay.com/usr/jon_newcomb
33:57 - Affable Snake Breadboard LED bargraph
https://www.tindie.com/products/affablesnake/slim-breadboard-indicator-green-8-position/
35:34 - Mystery $2 ebay item DESTROYED by Widlarizer!
37:47 - Present from a 13yo viewer
39:40 - Multimeter PicoProbes:
https://www.tindie.com/products/twires/picoprobes/
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#ElectronicsCreators #Mailbag

Hi welcome to everyone's favorite segment Mailbag. Let's get into it. Thank you very much. B Butcher from Derbyshire In the Uk, Derbyshire, Derbyshire? I don't know.

Leave it in the comments. Hi to all my viewers in the old dark. Let's crack it open if you want to send stuff in Po Box 7949, Norwest, New South Wales 2153 Australia not Austria. Thank you very much.

Okay, hang on. Oh, it's taped all right for our protection. We have an extensive note in nice big font so I can read it. You know, eyes aren't what they used to be.

I've been doing Youtube too long. Anyway, that's it. Well wow, this is seriously powder. This must have cost a bit to send from the old dart.

Um, you know it's like on the other side of the planet. Oh thank you very much for the bubble wrap. Can always reuse bubble wrap. It's a lot of bubble wrap.

Must be delicate. I'm getting that we're close. Ah, what is this thing? I don't know. You can see it, I can't What is it? Let's have a look.

It's got a big whopping heatsink on the back. Some weird a sort of custom pin connector. It's a Dancon Rt-403 one. What? 25? Oh, it's a.

um, it's a Cb transmitter Cb, another Uhf rubbish. Um, isn't it like or is it a uh I. I don't know the Uk like standards and stuff. Oh, I'm made in Holland.

One of my viewers in Holland. I know there's some. Did I pay? Let's read the note. Greetings from England.

The old art. My parents recently bought an old riverboat in the nether regions. Uh, which they plan to sail down France to the coast to cover. 19 permitting.

Of course you haven't got freedoms. You know you're on a boat in the middle of nowhere, but no, you're not allowed to go anywhere great. Uh, the boat's vintage transceiver radio. Ah, it's a boat.

radio didn't work so the replacement new one. I'll throw on the old one away. You grabbed it for the mailbag. Thank you very much.

Features some very early Ics to select the channels. Fantastic. Uh, the documentation not only lists all the radios components of schematics, of course, it adds schematics. Yeah, they stopped supplying this decades ago.

Anyway, right to repair videos on Eev blog Two, I've got an, uh, excellent, some excellent videos over there from the recent Australian Right To Repair Summit. So check that out. And yes, I agree, as a society, we really need to go back to being able to carry out basic repairs to all consumer goods to extend their useful life. Yes, I agree.

and I've got my reasons over on my second channel, so check it out. So he did manage to get some magic smoke to escape. Um, thank you very much Ben, Ben Butcher Awesome. Two minute tear down could be a bit more than two minutes because it's gonna have lots of Rfe goodness.

they don't make manuals like this anymore. Let's have a squeeze. Oh, somebody's got some handwritten notes. Handbook: Ah, trouble.

Look at this. So general description, circuit description, troubleshooting, alignment, all the diagrams, Everything you can possibly look at this. Look at this. Ah thing of beauty.
Joy Forever. Look at this for the different functional units: the exciter, modulation, amplifier, troubleshooting tips or voltage and frequency test points and staff, alignment of the synthesizer, the exciter, the Vhf driver, Ah, and the schematics. Just beautiful. Look at this like it's not hard to release this sort of information.

You already have it at the design stage. anyway. So like, ah man, and a bomb as well. Fantastic.

Like, why can't we do this? Oh, purchase. Oh, look at this 1978. Fantastic. I can't read Danish, but I'm sure that says uh, certificate of guarantee or something like that.

Ah, I have no idea what any of this says. that looks pretty recent and is that an addendum? no spelling alphabet? Oh okay, so hands up. if you use one of these bad boys, look at this one. What? 25 watts? Oh, swamp The airwaves.

Fantastic. These are very reminiscent of the knobs I have on my uh, Keithley old school Keithley gear. so very nice. Don't know what.

Oh, that's uh oh. Backlight. Okay, that'd be a backlight for in there I would imagine. And on the back there we go.

that's very special. Um, obviously. maybe that I don't know. Is that a marine standard thing? Leave it in the comments.

Well, it turns out there's no screws on this, so it's just a couple of knobs on the side. So oh oh, there we go. Oh look at that. Look at that.

Ah ah. you can tune everything. Yep. classic late 70s construction.

Oh look at this dual bodge chip. Wow. Hang on. Wow.

That's something quite special actually. Um, got a chip under there and then the soldered the socket on top of that chip. Wow. that's a Bobby Dazzler.

Look at that. And then they've broken off a pin and taken that out as well. Haha. Nice work.

Only a two minute tear down of course. but we've got ourselves metal shield got a penetrator that goes through here. You can see it's soldered down to the copper plane on the board in there. And yes, tons of slugs for adjustment.

No idea, they're Motorola Jobbies. it's at a 4044. Got now. Saw some Polly put the kettle on caps there and uh, there's no, there's no attack.

Oh yeah, no. that's going to say there's no tag tents. Yes, they are. There You go.

blue, not that orange rubbish. We got ourselves a big ass power resistor up there. Um, is that like a dummy load or something? And on the top side here, we got more of it. Oh, I love the Heatsink.

Check out that the Heatsink on the dip package. Have you ever seen one like that before? Wow. there you go. So is that like a Tda or something? Tba? Oh, okay, don't know it offhand, but uh yeah, they've actually bolted on a Heatsink.

Sort of like a custom Heatsink with a cutout for the chip and a bodge wire going to it. Nice. Check out the giant package though. Look at this.
They're enormous. I don't even know what that package is. Uh, called offhand. It ain't none of that To 92 rubbish, that's for sure.

But transistors as far as the eye can see. There's actually only a couple of To92s in there. got a cermit trimmer and yep, just regular axial stuff and got some electrolytics up there. Some Fraco Fraco electrolytics.

Uh, West German? Oh, hands up. If you've seen those any Fraco fanboys out there, Maybe. Anyway, the only interesting thing in here is, what on earth is that Plcc package doing down in there that looks pretty modern? Doesn't it does that? Like some sort of like Considering that. yeah, it looks like all the mods all the mod wires seem to be going off to this board because you know that's that mod wire going over to here.

So I would assume that that's some sort of like, maybe even a, like after-market um, hack or something. Or they've just like taken an old design and they've modernized it with some decoder or something. I don't know. Leave it in the comments, you got any idea.

I've got some funky looking relays up there. Yeah, big beasties. So what are they switching? I I don't like. maybe switch in the load and there's the transmit stage there on the back of the heatsink.

And yeah, the relays are on that board too. So they're They're like, yes, switching in the big power resistor there. And there's that mod board. So if anyone's got any idea, it's just.

it's certainly, uh, out of place. technology wise. everything's surface mounts, so that's a good, you know, 10 years, at least 10 15 years ahead of, uh, the rest of this. There's the money shot for the Rf aficionados: ceramic package jobbies nice of course, little uh chokes for the power and stuff like that.

So there you go. So I assume that they'd have like a metal stud on the bottom of them to go through to the yep, yep, Yep. I can just say just see a big metal stud in there that goes through to the heatsink. Nice.

So that's a 25 watt Rf transmitter. So thank you very much Ben for sending that one in. And of course all the schematics. Yes, I agree, they don't make them like this anymore.

Why not? Like how hard is it like if anyone wants to steal your design, they're going to steal it. Like, ah, company's going to work out this eventually. that there's like, even if they just do it for a marketing gimmick like why not and our workbench of the week, it comes from Tony Albus. You may be familiar with the name because he has a Youtube channel.

Check it out. only just a smidge under 2k subs. Come on, let's get him up to 10k subs. At least let's get him into the four or the five digits.

and um, yeah, lots of, uh, test equipmenty stuff. So let's have a squeeze at his bench here. This is, um, just what? Like, He's got some off to the side here as well, lots of Rfe goodness and he has actually listed everything in here from left to right. We have a Tti.
um, worth searching for Tti stuff on Ebay by the way, because it's not a huge brand, but Tti can make some good stuff. anyway. there's a Tti three gig frequency counter tf930. It's a Marconi 2432a counter there.

Why? you need two counters? You might want to. You know, If you're into your Rfe stuff, you might want to be. You know you're measuring your output frequency. You might want to measure your intermediate frequency at the same time.

Then there's an old-school Mokani Marconi radio test set. Absolutely fantastic. You can pick up lots of these radio communications for sitcoms receivers on ebay really cheaply, and they often have like, you know, sweep sig gens in them and all sorts of stuff. So well worth looking out for those sorts of things.

There's a two gig enritsu spectrum analyzer there, old school stuff. and of course, he's a member of Tea The Test Equipment Anonymous on thread on the Eev blog forum, which I think is probably one of, if not the biggest threads on the Eevblog forum. It's absolutely yeah. If you want to, uh, discuss your test equipment problems, then acquisition problems, then that's the place to be on the interwebs.

And of course, we've got Sieglet Scope couple of Keithley old school Dmms here. One's one of those ones with the scanner cards in it. Got an 01 multimeter here for some extra digits. Old school, Weller, There you go.

One of those fixed temperature job is curie point fixed temperature, Some old school power supply down here. One of those, um, I've got one of these uh, Volt craft um that come under various names. It's like, you know, 40 amps or something. At 15 volts and more power supplies, you can never have too many power supplies.

and um, yep. a desoldering station. Is that a hot air station? I don't know the brand off hand. There's more miscellaneous gear down here, and that brings us to Tanaa, the miscellaneous gear, um, side of the bench.

Which is all the yeah. That's why he's a member of the Test Equipment Anonymous forum section, because yeah, you tend to acquire these things on ebay. Probably got it like a job lot here. don't know what that those are.

I'm not sure. Old school meters up the top here. Oh wow, oh wow. It's like the old school These slim form factors.

I've had a couple of, um, I've done a couple of videos on like old school, uh, meters and scopes. I've got a scope with the little Crt on it, which is, uh, the old. Was that a Tti or was that a Sinclair? can't remember? old school Sig Gens and stuff. Um, yeah, I tend to acquire these things anyway.

If you've got a problem, visit the test equipment anonymous. I'll link it down below. Thanks Tony! This one comes from reading R-i-e-d-o-n Thank you very much. I did actually open this because it didn't have mail bag on it.
I get normal stuff sent here too. You know they're from Alambra in California. Um, I don't want my Californian viewers. All right.

let's check it out. So I realized that it was a male baggy item so I have not actually foam. peanuts? Hang on. Foam Peanut alert.

I'll check out the box in a sec. But here it is. We have probes fantastic that goes into a multimeter obviously and ta-da Here it is. I haven't seen it.

You opt it. There's nothing in there. Geez, it's got a okay. it's got a bigger screen on it and it's got a switch, a fuse, and a bigger screen.

No buttons, no nothing. and on the back just a couple of um, banana plugs and uh yeah, Iec mains. You put none of that earth pin rubbish either. Check that out.

and a Usb. so I do believe it's a Usb current meter. It's a game changer. It's a smart current sense.

The new kid on the block, hi Dave. Reading is a Us manufacturer of resistors and shunts. Oh cool. Okay, yeah, I have heard the name before.

I don't think I've ever used them. Though close. you'll find one of our new products, the Ssa 100. It's a unique combination of features that's available on digikey from 100 to 1 000 amps.

So okay, we're up in the big leagues. I'm kind of like a nano amp and micro amp kind of guy myself. But yeah, for those a big current aficionados, this could be cool. It's an amplified and reinforced isolated analog current sensor with 12.5 millivolts per amp output.

It has a Ul approval all the requisite stuff. 1500 volts isolation sensor needs a three to five volt supply set along with an Arduino-based current sensor meter. Uh, it uses a 24-bit A2c, etc etc. and it's available on the githubs.

Thank you very much Phil. Um, ebbet, who's the Vice President of Engineering at Reading. So yeah, let's crack it open. That's a, uh that that looks like a 3d printed case.

It does. I'll show you up close. I swear it's it did. I can see the layers.

This is an interesting case for this. Uh, isolated differential analog current sensor. Look at this. Just pull those up there like that you are listed of course.

Um, and you just whoa. Look at that. Isn't that a neat bit of packaging you probably haven't seen before. I like that and wow, that's pretty beefy isn't it? And this is the uh, this is the mounting base for it.

So you need to screw that puppy on there and they even tell you what to talk up the nuts to. Nice. They know what they're doing, so maybe Phil can tell us. uh, or give us photos of what's inside this thing.

Unfortunately, I can't because it's all potted. There you go. Secret squirrel secret sauce in there there it is. 12.5 millivolts per amp output gives you up to uh, plus minus 2.5 amps.

Uh, devolts out at uh, 200 amps. so that's very nice. So it'll go differential of course and it's fully isolated. So uh, like, you could use it with almost practically anything.
really. Just need to supply from three to five point five volts. That's nice. You can now just run it from a regular.

like digital. Uh. supply. Excellent.

I assume that's an off-the-shelf connector, but I haven't I don't think I've seen that one before. I'm not sure if it actually comes with this. uh, cable or not, you'd have to have a squares. But anyway, this is the uh, this is the runt of the litter.

This is the 100 amp Joby. Ah, they do go up to at least 500 I think. But anyway, look at that. Beautiful.

It's as rugged as a brick. Dunny. Unbelievable. Um, that's fantastic.

I love that. Uh yeah. obviously we've got power and um, differential sensor output and that's it. And these cables feel awesome quality.

I assume this is like an output cable, so I don't know why it has to be that beefy. But anyway, um yeah, these are all all the cabling. Everything's very dressed. very professionally that looks 3d printed, doesn't it? But it almost looks too good to be 3d printed.

But it's got that ridgy, rigid edge action happening. Yeah, it's 3d printed because yeah, obviously. um. this front panel bezel is 3d printed as well.

Looks pretty neat actually. they're obviously not designing these for production I would assume. Or maybe this is just like a, you know, I assume it's just like a low volume engineering. um, you know thing, I don't even know if you can buy this, uh, receiver.

Anyway, looks like it's got an off-the-shelf uh, touchscreen. You know, one of those smart uh screen boards that actually contain like all of the uh, what, is it a Nextron? Um, yeah. it probably contains. like all the uh smarts you know, that does all the graphical user interface and and things like that.

There's plenty of those on the market. Nice. But anyway, um, this is actually quite well done inside. Just got our main switch.

There's an Arduino Uno on there. Looks like they've custom designed their own board on top in there and I I kind of like it. they've You know, this is a nice, uh, way to produce a I like either a one-off or you know, like a small volume. uh, run of like, you know, engineering, uh, demo prototypes or whatever.

You know, If you've got, you start whizbang startup company and you want to, you know, show off your new uh tech, um to your investors, then uh, you know something like this that kind of looks like, uh, the business, um that'd get the job done. That's really quite nice. although personally of course I would have just used like an off-the-shelf pack tech case or something. You know, 10 million, uh, cases of this sort of size and form factor on the market and then just, um, you know, cut the front panel out.

So yeah, I don't know, But neat. There we go. There's a better look inside it all. and that's neat.
Of course. this is how you uh, power these things like you just like, don't care about, uh, cost for something I look. low volume runs like this, so you just whack in something like this. Off the shelf? Uh, power brick.

Yeah, off the shelf power bricks like that. Just really easy to integrate into a box like this. and there you go. You can down a custom shield on top of that.

Geez, that's a tiny little pin pitch. What a little bastard that is. There you go, Lt Jobby. Anyway, that's our measurement.

Adc, Is it not? Yeah, I think they tell us it's an Ltc2499 24-bit Adc, even though I can't read that on my camcorder screen. So yeah, just design their own custom Arduino interface and then that easily drives the Lcd and that's a great. sort of like you know, low volume engineering solution. Amphenol connector porn.

Look at this. Oh beautiful. All right. let's switch this bad boy on, shall we? Oh, look at that.

Oh straight in. Beautiful. None of that boot and rubbish. Smart shunt current meter.

Why? And it connects via the Wi-fi's off. Hey enter password default: 444. offset voltage. Oh yeah.

Oh, I guess we should be measuring the offset voltage with our meter volts per amp. Adc scalar. nice digital filter mode. Oh, that's exponential.

Mean average number of averages Five Sweet. Look at that. There you go. One milliamp resolution on our 100 amp current shunt sweet and we can oh zero That out there we go.

Nice big gigantic font. Like I said, like is this a product that they sell? I mean, they're just selling their shots. So I guess this is just like a demo thing for trade shows. Maybe? I don't know.

If you ask him, they'll probably sell you one. Let's try it out 9.997 and bang on to the least significant digit. Bit of a shame that it doesn't have any uh graph capability or anything like that. It just networks over.

Anyway, this really doesn't have anything to do with the actual product, which is the smart current shunt itself, the Ssa 100, and the higher value units. And if you have a look here at the data sheet: 0.1 percent, uh, nominal accuracy of this thing 300 kilohertz bandwidth? It's 69 bucks at digikey. They've got 472 in stock and so go for it. And like 69 bucks might sound expensive for a current shot, but it's not.

This is fully isolated Accurate. takes out all of the issues uh, to do with like a remote, uh, current sensing and stuff like that and gives you a nice differential output. You can feed into any Ada isolated output you can feed into any Um sensor system. So yeah, that's terrific.

So yeah, in that regards it. when you're building, you know, systems together, like 69 bucks for a sensor that takes all the R D work out of. You know, you wouldn't build this into something that you're shipping in a million volume or something like that, but for some you know, industrial, uh, plant or something you know, some big current system that you're sensing that, or even something you're making in low volume. Yeah, it's worth every cent, so that's a very nice bit of kit.
Thank you very much Phil for sending that one in. It's a current shunt, but they're remarkably interesting. Well, I think so. Anyway, Hi to all my viewers in Deutschland, in particular Jan Bath films.

but yeah, I'm not going to be able to pronounce that anyway. Thank you very much. Uh, let's crack this. I don't have to crack it open.

Somebody's already opened it. This is like. I. I would not have done this.

I, I would not have done this. I swear, I think somebody's had a looksie. Oh postcard. Check it out.

There's nothing written on back and that's in German on the back. I don't know. 252 meters. I? I don't know the Bonzens Lake River thing.

Cool. Looks good. Dear Dave, I'm a long time fan of your channel. I'm proud supporter.

I love Fundamentals Friday! One of the first videos I watched was about the Sea Back effect. Oh yeah, I think that was a pretty good video. Oh my goodness. Oh my goodness.

Look at this. Look at this torch. Oh that's a it's mains. It's it's.

a rechargeable. Is it a mains rechargeable torch Here in Australia? Another flashlight. Rubbish. Um, it's clearly not working.

Oh, that's oh, the bulb in there. Oh Crusty. Hands up. if you're still using a bulb torch like oh, that's it.

Oh, we've got some Audi Audi catalog from Germany. You inspired me to build my own circus, which eventually helped me change professionally. I went from mechanical designer to power electronics project manager. Awesome! Yes, I'm that guy.

Real electronics engineers hate and part of the blame is on you. Thank you very much. Please say this early 90's Soviet Mains Voltage Rechargeable torch. I guess the circuit could not be any simpler.

Maybe you'd like to explain that the batteries have died long ago, but the mechanicals still work. And I really like the ergonomy. The ergonomics. Um yeah.

it feels perfectly like. you know, weighted in that. like nicely weighted in the hand. And and the contours and grips are just.

I. I like it too. And you know, thumb operation like that. It's a Bobby Dazzler.

Oh, those Ruskies. Look at this Bobby Dazzler from those Ruskies. Ah, beautiful Ren Renuk. Something like that.

But ah. good old-fashioned bulb who misses the bulb? Who's got a who's still got a dolphin torch? Hands up. Just a single screw to get it apart. They've got a lead in there, presumably for charging we're in.

Oh geez, they don't spare no expense. Look at that. Um, yeah, that's got a Is that A that's just one big cap. This is supposed to be like a mains thing Straight in.

They've got a mains, a capacitor dropper. Have they 0.5 Mike genuine? A Russian cap? I'm sure. not yet. 91.
8th Week? 91. Uh wow. That Pcb. Oh wow.

Krusty Burger. Look at that. That's like bakelite stuff. Um, I they look like their diodes.

Um, the dots indicating the anode or the cathode. Hands up if you know that package. because I don't think I've ever seen that package before. Anyway, it's it's fused for our protection.

but yeah, obviously. Um, it's just got a capacitor divider and a series resistor and a couple of diodes. and that's it. And these are our crusty, rechargeable batteries.

They're like Niketa or something. Are they? Oh yeah. Look, minus 0.26 whatever that means. And what's the T.

People there? Sort of getting friendly with each other? I don't know what the deal is there. Um, 90? Is that 92? It's the year? perhaps. but I assume that is a Nicad. Like just three Niked cells in this thing.

Um, if you've got any details, I'll leave it in the comments down below. But yeah, they're a bit, uh, a bit crusty now, aren't they? So yeah, it reminds me of the old, uh joke whether or not it's uh, true, that the Nasa spent, you know, millions of dollars developing a pen that worked in space and the Russians? well, they used a pencil. It's just yeah. Have you ever seen something so crude and simplistic.

Was this sold in volume? I know I do have quite a significant number of Russian viewers. Uh, please let us know if you ever had one of these. Was it like it was it for home use or was it like if you used in like I don't know, some other like you know, specifically used for some industry or something like that, Please let us know. But thank you very much Jan for sending that one in.

Um, there's not much to it, is there? Oh goodness. hang on. did I say Rusky? Those pesky Russians have some bloody Soviet Union. Back then all the kitties in the audience are going.

uh, what's the Ussr? back in the Ussr? You don't know how lucky you were. boys back in the U.s Second sucker of the serve from the old dart. thank you very much. Uh, Jay Newcomb.

Um, I did not open this. I swear it came completely mangled like this with a spoiler alert, a board hanging out like this is how it arrived. We have a board. Well, we have more than one board.

We have multiple boards and you know I like. Whoa. Big fan of Proto boards. You're on the Eev blog.

You should always keep a bunch of Proto boards in your kit of various types and that one looks like a Bobby Dazzler, so I will take a closer look at that. Now down to 0.5 mil pin pitch and it's got, uh yep. and there's all the it's already got the goodness on it. Fantastic.

Ah, excellent. There you go. So I assume open this second. Number two, Open this second.

Oh, as in set this second, Not open this second. Not this second if you know what I mean. Anyway, Oh oh, we got more of them. Oh, I love Prada boards.
Ah, huge fan. There we go. Look at that. Another one.

Beautiful. That's all that's got all multiple different types. Oh fantastic. He's going straight to the pool room.

Ah, these aren't just proto boards, they're actually micro controller proto boards specifically. although you could use them for other stuff as well. But they're more specifically designed for micro controllers. And you can read all of John's stuff here.

But it's got all the goodness required to get a micro controller up and running. So let's take a squeeze at, uh, this main one here and check it out. So starting in the middle, we've got a point five millimeter, uh, pin pitch. uh, quad array here.

and of course, uh, they. you stagger them like this so that you can get different, um, size chips in there. You can get a smaller one, or a slightly larger one, or one bigger. Up to however many.

What is it? Um, a hundred. That's more than enough. I mean, if you've got a bigger micro controller like that and you, you know, probably not building it on a proto board, you're probably like just doing like a custom a Pcb or something and then surrounding that, you've got some point one inch pitch, uh, stuff as well and 0.05 inch of pitch stuff as well. They don't actually connect to anything, they just start floating so you can you know, like put in a little connector or something like that.

Speaking of which, if you go up in the corner here, there's actually a jtag uh interface or you know, an in-circuit serial programming uh, patch that you can just sort of patch into this thing and then the all of the pins they actually break out into larger, um, 0.1 inch headers around the outside, so you can, you know, connect all your Ios and whatnot. Um, you can even. You know you could bridge them over to breadboards. You could do whatever you want to do with them, and there's some regulation stuff down here in the bottom corner, so you can, you know, put in a 3.3 or whatever volt regulator and then if you didn't like your 0.5 millimeter pin pitch and we've got some other packages on the back side, a point five millimeter, uh, jolly .65 millimeters and uh, then just a like, a little so um, footprint as well.

And they look like they fan out to these ones over here like this, so you'd have to follow the money on that. But um, yeah, that's a really useful board. And there's a 3.3 volt loop going right around the outside so you can. Actually, it's got little bridge pins in here, little solder bridge pins.

so you can actually connect 3.3 volts to any of your um, I O pins, any of the pins at all on your micro, and presumably can you do the same for ground So it's almost like, um, Fpga routing for your micro kind of sorter. But yeah, that is neat. So he's got an example soldered on here and labeled. So your micro controller goes here.
Oh thank you. Is that one of the arms that you can't get these days on? That could be worth like million dollars or something? Um, have to desolder that put on Ebay series termination pins? Of course. You know this is not going to be useful for any sort of like high frequency work or something like that. It's not controlled impedance.

it's only too late. Like there's no internal ground planes or anything. uh like that. But anyway.

um, there's a regulator here. It's got scope clips as well so you can put in like the little ground loops in there for your scope probe. It's and as I said, it's got a Jtag interface down here and he's put a little Led up there. We have a diagrammatic example here.

So the micro controller pin. There you go. so you can look. There's a cuttable pad like this and you can fit uh, like a uh, like, is it an Oh 603 or something package.

Anyway, you can fit that in there and then that goes off the proto area. There's a solder bridge there, which yep, goes down to ground. I thought so. and then yep.

solder bridge Or two. solder bridges can take you over to three point three, and uh, and a point one inch header as well here. I just a lot of flexibility in there. that's great.

and he's put other practical examples: how you can put a low-pass filter for example, yes, you could. He's got a crystal on the backside here so you can connect a crystal and uh, the caps as well over to the pins. Nice. and you can strap the pins to ground and 3.3 volts.

And he's got exactly the same thing available in an So Uh thing. up to 24 pins. uh, different widths available. Very nice.

And yep, it's got the same sort of flexible routing on the back. And if that's not enough, well, there's one for almost every type of package you can imagine. So you just buy this as a big panel. As I said, it's worth having one of these panels available in your uh, junk bin just for doing like hashing together little prototypes and stuff like that.

So that is groovy. So thank you very much John. There is the link ebay.com Sch Sketch John Newcomb Thanks John, Thank you very much Affable Snake. It's from Affable Snake of course it is in Houston, Texas.

Fantastic! Had all my viewers in Houston. never got to go to Houston. Um, we actually had a facility in Houston. Um, that did for a job and I never really got.

I never went there. So yeah, a bit disappointing. What do we got? We got a note and uh, we've got a slim breadboard. I have no idea what a slim breadboard indicator, but I assume it's slim.

It goes on a breadboard and it indicates. thank You Andrea A Whose Affable Snake I found myself in need An absolutely tiny lead bar graph indicator for breadboard use. Yes, being there, needed that without needing to deal with the added complexity of needing a resistor for every landing app or the outer space of an actual bar graph indicator. Yep, yep, yep and decide to make a product out of it knowing other people would probably want similar.
Yes, So he's included one as a fully assembled but also sells it as a kit. A slim breadboard indicator. Another classic thing which should go into your kit. Look at this in into your breadboard kit like I've got a like a breadboard like a thing with all like breadboard accessories and stuff like that and there's our common over there and that just goes into the point.

One inch header. Ah, too easy. Well worth having. Thank you very much Affable Snake, I'm sure it's gonna work like I don't have to do that.

And there's our resistor network on the bottom. and jeez, that thing is top. What pitch is that? What a Mongrel! And we've got our one dollar delivered item from Shenzhen. You can just tell and well, I can feel what this is.

So yeah, thank you very much for the anonymous person of course who sent this in and it's a does it actually work? Does it? She can't even get it out of the packet? Yeah, doesn't work. doesn't work. It doesn't even come fitted. Oh, you got to put like an Lr-44 in there.

Ah, what a bummer. Get it? I'm here all week. Oh, that just feels so cheap. I could like add a joke in there, but oh, I'll refrain.

It's as cheap as a two dollar ebay item. Um, yeah. Oh no. It did actually come with batteries.

It just had a little cover on the top. Ah, nice. All right. It's still a cheap pile of garbage.

Oh, there we go. There we go. Yeah, yeah. quality mailbag items.

Don't say people don't deliver. Uh, yeah. I think I know what to do with the uh, widely riser. Hang on.

I couldn't actually get the motor out, but it's just going to have a countersunk on the end of it. I pulled the end cap off, but that's about all I could do, I'm afraid. need a good steel plate in the lab for widely rising stuff? Anyway, here we go. Oh, that's a tough one, Tough sob.

Let's do it again. Wow. Hang on there we go. Ah, now we're in.

Yeah, I think my block of wood had too much compliance in it. Anyway, yeah, there's our camera. It doesn't spin anymore. Let's go figure.

Um, yeah, it's just got a counterweight on there that just spins around. And yeah, well, that's it. It's a squishy motor now. Another one for the United States of America, which um, I is opened but I don't ever remember opening it anyway.

Thank you very much. I'm not sure the first name, is it gim Fifa? I'm not. I I'm not sure because it's really strangely but 13 years old and he watches my channel uh with his dad who is, uh, not with us anymore. Sorry to hear that.

I am very grateful for your Youtube because I've been studying and practicing electronics for a couple of years now and I am older. and when I'm older, I want to be an electrical engineer like you. Fantastic. You don't be like me, but you know? yeah, electrical engineer? good idea or electronics.
Another electrical rubbish and it doesn't have a Volt meter. Um, so he's making these neck, uh, ties these necklaces. I guess it is. Um, to try and sell locally.

Uh, to save up enough money to buy a multimeter. Thank you for all your videos. Davey Jones Enjoy your glow-in-the-dark necklace. Appears it glows really good if you put it under black Uv for a few seconds.

Thank you very much. I'm I. I. I can't get that fir.

Why can I not get that first letter of the first name? I think it's Kim. At first I thought this was like it's got a coil on it and it's got a ferrite. Looks like it has a ferrite bead in it. I think it's been beat up a bit in the post unfortunately, so I can.

I know, I can wiggle, wiggle, yeah, that back together, but I don't believe it's going to actually do anything in that regards. It's just a glow-in-the-dark necklace, so thank you very much. I have his address and he's without a multimeter, so I think I'm gonna. I've got a box of multimeters over here.

I think I'll ship him one. Thanks mate. All right, let's test the claim. Oh yeah, no whackers.

Hi to all my viewers in the nether regions. That's the Netherlands, um, and in particular I. I originally pronounced this turd Wages, but it's Tj. I'm sure the j is silent, so I'm sure it's tiered or something.

Maybe it is pronounced turd. That would be unfortunate, but thank you very much. Um, so let's crack it open, see what's in here. Oh, background hasn't turned off yet, has it? Oh, there is a note.

Probes stuck down all over the place. They are multimeter probes. They're two millimeter jobbies. That's interesting.

Get my old analog. my first multimeter. My first Tandy analog vom uh. multimeter was a two millimeter jack and we've got two millimeter to four millimeter adapters.

Right off the bat, That is going to be handy. Yes, uh. black on red. It works every time.

And we've got a little pogo pin. Are they actually pogo pins? Are they just sharp pins? No, they're pogos. And we've got other little sharp adapters. Cool.

Always worth having once again in your kit. Um, worth having. like multiple, like different types of test leads for fine probing stuff, little easy hook probes and all sorts of stuff. And you know, like banana plug to Bnc adapters and all sorts of stuff.

Anyway, it's been a long time fan since number 42 I can't remember. Oh, exploding caps? Yes, in slow motion it's been 11 years. Tell me about it. About time for uh to contribute something.

For the past year, I've been making multimeter probes, which Pcb work better than the large standard probes you get with a multimeter. Hence, pico probes. He sells them on Tindy. Awesome.

Let's check out pico probes linked in down below. Oh, there's silicone too. Oh, none of that Pvc rubbish. There you go.
Scan that on your shoe phone and that'll take you over to Um. Judd's Tindy store where he sells these pico probes. The probes are also replaceable, interchangeable for different shapes. I've taped and touched.

Some serrated tips work very well on pin headers and rounded objects, and he prefers the two millimeter banana interface over the bulky four millimeter. I don't disagree. I like the uh, two millimeters Anyway, he's been watching since episode number 42. Thank you very much.

So we have. Ah, here we go. Got lots of nice little tips They're not. Oh yeah, they are Pogoey.

So you've got multiple different types of uh, two millimeter to four millimeter adapters here, so you just whack those in there like that. And that's sweet. That's nice and compact. I like that the only thing missing would be some, um, easy hook interfaces.

So how do we stop rolling away? Bloody hell yeah. I think if we want to replace our pogo pins in there, we have to cut the heat shrink on that. What a bummer. But anyway, they look at those long probes getting those hard to reach places.

ooh, nice. And the silicones wires very nice. So there you go. That's a nice little bit of kit.

It'd be nice if you had like a matching. As I said, like a matching little micro grabber attachment or something like that as well. That would be sweet. Anyway, thank you very much.

Check it out the pico probes you.

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By YTB

20 thoughts on “Eevblog 1410 – mailbag”
  1. Avataaar/Circle Created with python_avatars Annie Masters says:

    Re – the marine comms unit; This, of course, is how things SHOULD be… Please Apple , LG, bleurrr… take note. Maintenance proof stuff does you no good

  2. Avataaar/Circle Created with python_avatars ブブタン says:

    "Sigtec has successfully designed and implemented a broad range of client solutions including portable process alarming, major incident notification, portable fire alarming, Tunnel FM safety radio systems, lone worker and emergency team radio & callout systems."
    I guess that answers that. Old analog technology modified for modern safety regulations.

  3. Avataaar/Circle Created with python_avatars lance moore says:

    I've seen similar connectors to the one on the back of the Dancom on some old analog broadcast AV switchers. I would guess it's an obsolete standard.

  4. Avataaar/Circle Created with python_avatars Fabrizio Fabrice says:

    Telefunken Bajazzo portable radios from the 1968 – '69 era use the very same 1kµF 16v Frako caps in the audio output and power supply filters. They're still working in-spec!

  5. Avataaar/Circle Created with python_avatars singhpk99 says:

    Dual Bodge chip adds new channels. RCA/SGS made the CA810. was very popular in India. Phillips BC147 BC148 Bf194 etc were very popular in India too. All of them made by BEL India too

  6. Avataaar/Circle Created with python_avatars Martijn Holland says:

    Greetings from those Nether region’s aka Netherlands aka Holland. Were we are speaking Dutch, not Danish.

    Tjeerd is pronounced same as cheered in English.

  7. Avataaar/Circle Created with python_avatars Howard Higgins says:

    I liked all the copper cans for the IF transformers in the marine radio.
    Even back then, governments wanted to identify and track its citizens – now they just put GPS into your cell phone that you can't turn off.

  8. Avataaar/Circle Created with python_avatars inkubik says:

    D-0.26D means
    Disc – 0.26 Ah – Long discharge regime (Dlinny)
    it's basically a soviet copy of 320BVH
    the figures are probably the plant's stamp

  9. Avataaar/Circle Created with python_avatars Andrew Nisbet says:

    I remember connecting standalone Sigtec Selective call units to Phillips and AWA VHF radios in Seven Hills (Sydney) back in the early 90s. I saw some notes indicating they were mandatory in the Netherlands, 'blast form the past' but great technology for the time.

  10. Avataaar/Circle Created with python_avatars Greg Ewing says:

    You had the same first multimeter as me! The ohms scale on mine was black instead of green, and I think it had different branding, but it was essentially the same unit.

  11. Avataaar/Circle Created with python_avatars Mr. Green says:

    D-0.26D it's no russian – it Soviet. At that time, they(russian) did not have time to exchange the machines for alcohol, or have huge stock. But D-0.26D (330mA 1.2V NiCd) is unique since the Cold War

  12. Avataaar/Circle Created with python_avatars JanJanson84 says:

    Haha, I remember one of these lamps from my childhood. The charging took like forever and the batteries died after a short time. maybe the batteries in my lamp didnt have a lot of capacity left.

  13. Avataaar/Circle Created with python_avatars Frank Reiser M.S. says:

    i agree with you about theDancom providing schematics. i am a video/audio repair person and I usually cannot fix electronics without the schematics that companies do not provide/ Companies don't want you repairing their electronics because they don't want people fixing them; ompanies want you to buy new and not repair their electronics. I make only about $300 a year with my repair business.
    Frank

  14. Avataaar/Circle Created with python_avatars Killerspieler0815 says:

    @EEVblog –
    The disfigured "A" is a Cyrillic Russian "D" in reality ,
    the DODGY Soviet mains torch has 1970s style (of colurse the old plugs are a shock hazard as the USA plugs) ^^
    It is clearly home use only.

  15. Avataaar/Circle Created with python_avatars Carsten Saager says:

    I had one of these mains chargeable torches. Unfortunately one of the connectors came loose and got stuck in the wall socket.. As the normal 7 year old, I grabbed it with my fingers and since then I had been hooked to electronics

  16. Avataaar/Circle Created with python_avatars Martin Baadsgaard says:

    "Well I can't read danish but I'm sure it says certificate of guarantee"
    Stamp says "Holland Nautic".. 😒

  17. Avataaar/Circle Created with python_avatars Christopher Stone says:

    NASA Pen Story: Mostly false. Both NASA and USSR initially used pencils. Both disliked them because graphite is conductive, flammable, and flakes off (a terrible combination in space). NASA used mechanical pencils that cost $129; this was the point of public outcry. Fisher independently developed the AG-7, "Anti-Gravity Pen". Both NASA and the USSR bought hundreds of them at $2.39 starting in 1965. They are still in use today on the ISS.

  18. Avataaar/Circle Created with python_avatars Maurice H says:

    "SIGTEC A1203" Radio Call sign PCB. Due to governance Ruling app. 1994 they installed those. Pres transmit key and first call sign is transmitted. I still can reprogram those A1203's

  19. Avataaar/Circle Created with python_avatars chris price says:

    I have a question. Whats with all the free trial stuff on the oscilloscopes? i get that the software exists but are there any scopes where they dont dangle softwares with free trials at you?

  20. Avataaar/Circle Created with python_avatars David Ashley says:

    Thought I recognised that add-on board in the marine radio – it's an ATIS (Automatic Transmitter Identification System) board which became a legal necessity on all VHF transmitters in operation in the Netherlands, the Rheinland , and the Benelux countries in (if my memory serves me right) the mid-90s. Hence the upgrade board.

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