Hi Welcome to everyone's favorite segment mailbag. Let's get straight into it. Thank you very much He rich you. They've put a sticker on top that's a rich I think anyway from Mount Vernon in Ohio I think it is to the United States of America to real old-fashioned letter so let's have a squeeze.

What do we got? Oh we've got it's a tech scope for all you tech scope fanboys. Um, it's like a premium HP premium plus paper. Does this come from like an oscilloscope camera or something? I'd Three at the notes Hi Dave my name is Ethan could I Ethan from Ohio? I'm sixteen, young whippersnapper trying to be an electronics enthusiasts such as just a few already. Yeah, about a year ago purchased a tech 22:13 a scope on Ebay.

As you do when you're strapped for cash, it was listed in as working in condition upon receiving. The unit was functional, but the trace was so out of focus even with the knobs at full focus is practically unusable for anything except DC Voltage mentioned. do you have any thoughts is what might be the cause of this and if so, what the fix would be. He's basically only got a multimeter and some basic soldering and hand tools and stuff.

Thank you very much Ethan. Well unfortunately I am no tech repair guru at the best place is the I can't remember the exact name. I'll link it in down below the Tektronix Yahoo Oh Yahoo groups is shut down now aren't they Damn they just ah I don't know what. Anyway, there was I I don't know if there they? gone - I'll try and find out and include it down below, but there was a a very well-respected Tektronix group I'm sure they're probably might be on Facebook or somewhere now anyway.

Um, that's specialized in an old tech scopes and they will surely be able to answer your question. Absolutely Now, no doubt about it. Either that or on the eve eve. Love for Beauty I Know all my German viewers in the anonymous person who sent this one in via: Deutsche Post So here we go: Service, quiz, Hang up the right angle.

It's important. What do we got? We got my ear. Every era has its innovations. We show you the best of them.

I Oh I and robotics a pamphlet. the world's biggest Oh A world's biggest computer museum. didn't somebody? was it the same one the Heinz nixed off. Um, somebody said that last time.

it didn't make. Ah yes. As I mentioned the Heinz Nixdorf Museum one of your latest videos, we thought you might be interested in our English brochure have a look at our websites about. wow, it's the actual museum themselves.

I Guess they got nests and traffic from the eevblog. Anyway, Awesome! The Heinz Nixdorf museum team thank you very much. So I'm in Germany again or you're in Germany Um, check it out. Well worth that.

Looks great and it's got all sorts of activities for the kiddies that's fantastic that looks great. Love it! Thanks guys! No mail bags complete without a like probably $1.00 delivered eBay item from? you guessed it, Join up No! Vietnam Post Well maybe maybe it is actually from I presume Vietnam Mister China Oh, the exodus is happening already. What are we got? It's it's you know, little bored. Oh, it's a little plugin thing ID Oh, it's a little.

It's a little touch sensor. okay. quick squeeze, but there's not much to it. There's going to be a touch sensor chip on there.

It's a little 6 pin SOT 23 job' and um, yeah, that'll be all she wrote. I'll be like I squid now see you in a face, no office. Well it turns out this is actually rather interesting. This little 6 pin SOT 23 a touch sensor here.

It is from a company called Tong Tech and this is their tongue touch technology so I've never heard of this company before. It it's just a Chinese company specializing in ICS and you can actually buy this chip for about eight US cents from LCSC in quantity I Believe this one. this is the TTP 2 to 3, B and I think or the 2 to 3 and I believe this one is actually discontinued but there's that like the AE variant of it or whatever and I Thought it would be a nice crowd see in the face but it's not. It's just got the one.

I Oh here. so VCC can be up to our five point five volts and it's designed to just simulate a mechanical switch and it'll give you a nice Dee bounced thing as well. so you obviously just start touch the thing. the actual touch sensor is on the bottom here, the actual pad.

it's not on the top and it's designed for up to 50. Pico Farad's and capacitances got auto calibration and it recalibrates like every four seconds or something like that. and I believe it's got like auto shutoff so if you touch it when you pair up I think I have to look at the details more. but I think it might disable that switch if it's touched when it's powered up.

But anyway, yeah, it's the good thing about this. you don't have to dick around with any SPI or I squared C bus Rubbish. It just gives you a direct digital output that you can just replace any mechanical switch with a touch sensor switch for eight cents. so that's terrific.

Let's just hook this up quickly and give it a bell. But yeah, we'll just like we touch it and we'll just get an active high or active low depending on how you are strapped one of the pins. e Alright to set up a trigger point here with 200 milliseconds per division if I touch that. Bingo! This ones are set up for positive edge trigger.

you can see very nice. There's no switch bounce there or anything like that because there's no mechanical contact. Don't worry about the overshoot there, that's just the how probe in here. It's a bit how you doing all right.

Let's set it to 500 milliseconds per division and let me put my finger on here and boom and it releases. So yep, so it stays high as long as you got your finger on there. So we'll try that again. Just do a brief well hello, what? Just do a brief one like that and we zoom in.

And of course it's clean as a whistle. Beautiful! And you can invert the polarity of this as well. I Believe it's got a low power mode as well, which is quite fancy pantsy and it draws at one point three my Gramps. So you know Ferb right? Your sense? that's a pretty nifty.

if you want to just add a poor touch system. you know a touch button, power button or whatever it is or multiple once it get a bit expensive. If you use one of these for each switch, there's better ways to do it. A lot of tons and micros now have touch support built-in so you know if you design the microcontroller design and you wanted a whole bunch of touch buttons, you just get a micro with touch built in.

But yeah, if you just want like one or two buttons and you don't want to dick around with any software, any micros, any busses or anything like that and you just want to use a direct digital input on your microcontroller, Then that's a neat little chip I like that, so it's well worth a look. I'll link it in down below. that's a winner. We're not chicken dinner, and of course, there's a bit of art in designing sensor pads and things like that.

Yeah, the greater the size of this, greater the sensitivity. But there's trade-offs and things like that. So yeah, and there's different pad geometries you can do and things like that. and that might have to be a entirely separate video because a lot of your more advanced art touch controllers can you know.

like interference discrimination, water discrimination if you get moisture on there for example, that can cause a problem. Things like that, in fact, let me try that. Let me just put a drop of water on that. I don't actually have a dropper so I'll just have to.

What? There we go yet. Triggered triggered I didn't put my any my finger anywhere near that and it's still triggering. So if I blow that away first, change the slope of my trigger. Blow it away.

Did it do it? go off? Not still there? Is it? Ah, it's a bucket. Ah, might have been the auto. The recalibration might have automatically done that. if I wait long enough, maybe I can get it to.

Oh yeah, there we go. it was doing that. So I let me do one more little drop. No I was that was next to it.

no I Come on, come on. Dave There we go. Yep, trigger it. That's common and there's some specific touch sensors where you can get discrimination against stuff like that, but that's you know.

There's pretty advanced algorithms that go into these sort of things and the internal diet block diagram shows that you know this is not particularly a trivial sort of thing to do. And touch sensors go when I was a boy that was like advanced black magic stuff. Now sleep here. You can get two dozen inputs on your you know 50 cent micro.

Give me a break waiter wall my New Zealand viewers in particular Scott The Deaf Palm You should know the def par me is a fellow away youtuber a link in his channel down below but thank you very much Scott for sending in this. let's have a squeeze. It says cut open here So I am cutting open here and the content sounds rather boring I Must say open something interesting I'm sure it is. Let's have a squiz happy Christmas New Year you too.

Oh okay, it's a cable assembly. Yes, for the calculator, the FX um seven thirty p calculator. let me go grab it. So for those here, remember there it is the FX 7:30 P When Scott dropped by the lab we did a like a little mini like an impromptu I tear down on this and he has great repair videos on his channel.

So if you need to repair stuff I'm definitely check over the check out the Def Palm and is this Boyd Listen it looks spot. Oh no, it's only one way. Okay I just see it's got a little key. just go over the other way.

yeah that doesn't. that doesn't latch in at all. Maybe that end is gonna be geez, no that just sits in there loosey-goosey flapping around in the breeze. All right, no maybes it lost some sort of attention making this or it never had.

uh-huh and more additional detail. Def Palmer has set up a new website completely free by the way, my part's been dot-com which is a parts inventory site. We have to check it out. Cool! Also released an open-source version which is free to download beauty and use on local web server as well so you don't have to.

You know you can run it locally on your own server. No, there's no connected to the web rubbish cloud rubbish and you'll be closed too. 10,000 subs by the time I Get this awesome well subscribe. He's also on library I/o as well.

our board library dot TV or just library OBR Why I just passed a thousand subs on LBI Why So definitely subscribe to I link I'll link it in every video now my LB ry channel down below I'm trying to beat Bar Nicholas he's got like 1500 subscribers and I reckon I can beat him within the next six months. Cool. So I'll linking deaf Poms channels down below Jeff Wong Calm and my part's been calm. Thanks for the extra keyboard.

Don't have a printer, but if I ever get a printer, I'll be able to print if the cable ever stays in. hmm and stupid me shouldn't press stop on my camcorder and then open another package because I just got through talking about this letter from I'm gonna try and pronounce it again. Cons: Ho Hoc and cons: er Hakan it's probably a silent H or something in there somewhere in Pennsylvania so I've gotta go through the whole description again. Anyway, if you don't know, I sell my meters on Amazon.com in the US don't and Canada don't sell it in the EU anymore cuz they're ridiculous red tape.

Anyway, if you don't know when products get returned to Amazon they they actually get returned to Amazon not to me and then if Amazon deem that product to be, you know no good for putting back on the shelves because I don't know somebody's marked the no packaging box or whatever or somebody didn't like the blue holster so they returned it. Apparently Amazon's got some good return policy or whatever and so all these return meters. as a merchant I can actually log in and see this dead inventory in the bins and I can I Saw one day that there were three Meters sitting in their BM two three fives and you can actually get them sent back to you but only if you have a U.s. address.

So man. so I put a note on the forum saying hey, does anyone want free multimeters if you're a hacker space or a school or or something like that and somebody actually, well somebody did apply for them and then they never follow through. Anyway, the next lucky recipient is from the I am Academy and this is just their thinking know if they got the meters so presumably they worked I pretty much knew they would but there was no guarantee and I sent him Dr. meters.

There was three of them when I looked and posted that message but then when I went to actually send, then there was only two. So I don't know and did somebody Nick one at Amazon or D didn't they deem that one went back on the shelves I don't know what happened. So they've got two free BM 2, 3, 5 morning meters and that's just their thank-you note. so there see isn't that awesome I am Academy So it's good to see that they went to I'm good.

Use their design in their little robot. awesome little. It's pretty big actually. Jeez, it's decent.

I'm on that sucker. Anyway, awesome guys! Thank you very much. Good cause I don't My great view is that this one's from Costas glass to pull us sorry I did the writings a bit hard to read? Anyway, it's from Greece Thank you very much I rattles a bit anyway. Um, it's a Jlc PCB box obviously been making some boards or whatever I don't know.

it's just dead sticky tape I'm getting there somehow. Cheese: This ain't pretty well. it's kit. It's kit.

loosey-goosey parts are through-hole know that? surface mount rubbish. Got a big 40 pin dip Oh What is this? It's a oh it's a Scot 80 mega. It's a Scot it's got Scott Oh, it's a um yes, it's a mini PC I think it's a mini PC thingamabob. Um, please visit for building instructions.

Well, that's an IE for keeping a brief, it's gonna check it out. I Think this will be another Sagen Assembly video that'll have to be demonetized. of course, because you know design for kids? No. And if people don't know, no, just having a kid in your video does not make it child.

Okay, so technically you know if I drop a few F-bombs at the start of the video, even if it has Sagan in it, it is not a good. It's not a kid directed video yet. so that through-hole job II Unfortunately, like I don't have any Scott cables or whatever so I'll have to find something together. but yeah, I'm not sure if it's what, um, gifted PC it's emulating or whatever I don't know I'm pretty sure it's some sort of PC thing Now ordinarily I would just spend like you know what, five or ten minutes just assembling this, but this would be I think a great one for I'm saving to do so.

I'm gonna do well leave that and hopefully over the cause of school holidays Now we can get Sagan in and he can do some more soda and practice because he likes building not little kits like this. and yeah, through whole ones. Perfect! So I'll just provide a link down below and it looks like a kind of neat solution. It's just got no, it's all in an 80 mega and of course the Scott is like a RGB output and Scott's got no yeah, it'll only do RGB will it? Well, the RGB resistors there somewhere.

but yeah. anyway, it does like Ps2 keyboard and Rs-232 as well. Oh fancy pantsy. Anyway, runs a micro basic and emulate Lisa's various other things so that's really quite neat.

But yes, Scott's like this European thing where you can plug straight into your Scott TV don't have many of those ear thanks right? That was just the dho going and nixon these night. news. Anyway, very friendly guy and what do we got here? Oh I can't way ok for everything. Thank you very much Andre Oh Big time in Richmond Hill In the United States of America being released from Biosecurity control, we're pretty serious about a biosecurity here in Stata All right, open for inspection.

There it is stronger Donger: Is that border force destroying government? No. I don't know. it's the part Department have been inspected by the Department of Agriculture Now that border Force rubbish, you know if you come to Australia now you met by border Force Anyway, yeah well, they didn't take offense to the mousepad. Anyway, what do we got? We have our favorite thing on the EEV look I'm already made I say true Rms multimeter apps designed for it's it's a bluetooth job' ID Mm wireless app fifty thousand count cheese.

that's pretty good so that's gonna be $100 plus meter Oh Check it out I Can't do a full review on the mailbag of course but if it ever states on their website not compatible with iPhones Love it So thank you Andre for us sitting in this meter. It's around about hundred and fifty a Yankee bucks and I do actually recall this now some people on the eevblog for him. that's where you go to talk about test instruments. The best place on the interwebs.

So this is PDI branded but it is just a chemical manufacture meters for extech and all sorts of companies. so it's got ID Mm wireless Wireless dialogue in Bluetooth It's got true RMS frequency peak capture mode double motorcades 50,000 count so it's higher resolution which is quite nice, waterproof and dustproof which is quiet, jazzy and 2 year warranty from PDI so you know a little. it's quite smooth. let's crack it open so it counts with a little pouch.

our PDI have got their own pouch thank you very much and comes with the leads. comes with the crop clips, comes with the magnetic hanger attachment that's quite nice and the K-type thermocouple neat and looks like you know bog-standard Chinese IAM at probes and it's just the plastic plugs to make it proof. Of course, when you got the probes in there and the two extra plugs it yeah, it's supposed to be waterproof. II doesn't instill a lot of confidence.

Does it with the the Chinese QC pass sticker? No, that's just it. looks. um, that's all. Put a bit a bit of spit on that.

It's got all the genuine China dust on it. So yeah. terrific. It comes with a battery.

Ah, it's on. Now the specs aren't gonna set the world on fire. let's have a look. So now I'm not going to test any of the wireless stuff here today.

So yeah, don't ask me. Whilst it has the kind of spec yet, expect 0.06% Usually you know they aim for 0.05 plus 9 digits. You know it's a bit high, but I'd say that's on 50 millivolts. So 50 millivolt range Wow 50 millivolt range with 50000 count.

That's very nice thank you very much. That's +4 Did you say you know the DC spec is quite nice? But of course AC true RMS of 1% That's what you'd expect. But the DC current. unfortunately? no, it's not up there 1% so that's you know that's really down at.

You know your base level were three and a half digit meter kind of spec an AC current. and at your resistance, you wouldn't buy this for the accuracy. You're buying this for the resolutions and the rest of them for those playing along at home. Not that first.

40,000 count 40,000 I thought it was 50,000 count. Where did I reach? Yeah, 50,000 count 40,000 count. Make up your mind Cat: Three thousand volts cat for 600 volts. Yeah, okay, but it doesn't have any UL You know, independent or ETL independent testing.

So you know I'm not going to be if you really need a cat. for you know, 600 volt rated me to get a proper one, not a, you know, a proper rated one, not a chem one anyway. Ip67 waterproof and I assume it's fused. Yeah, 500 milliamps and ten amps.

thank you very much. and I don't actually mine the meters with us Center off like this. it's a bit unusual, but the good thing about it is that if you turn it this way, it's all current. If you turn it this way, it's all your you know your voltage so you can't blow it.

So in any of these positions, you shouldn't be able to blow the thing up by connecting to any voltage source so you know it has its pros and cons. But I don't mind that at all. And there's our display. It's quite a decent don't mind the look of those digits.

sorry about the glare and stuff like that, but you know that's alright. If you compare that to a Be M23 five, it's not fair. Of course. I mean this has practically some of the biggest digits in the business, but you know that's that's quite a readable display.

No worries. these probes I swear I've seen them on dozens of other meters. They just come out of the same random A Chinese factory and they're You know they are what they are. right? on to my mum about them.

Anyway, let's have a look. I think they had some and I didn't have input. Jack Alert: Nope, no input Jack alert. no beeping.

Anyway, that looks like really fast updating there in AC mode. Wow, that's pretty Jersey no workers in that. Yeah, that's DC mode and range on I will have to switch over to Millivolts. supposedly has a 50 millivolt range.

There it is that whoa, what? And show is precisely zero. That's a bit. Well, nope. guys.

Overload. as you'd expect. and then it showed precisely zero. It's windy down, but white showed precisely.

yeah, like it locks in at zero there. so not sure what the deal is there. That's a bit strange and then it jumps to overload again. Hmm.

Anyway, it is stupidly quick updating for a 50,000 count meter. Anyway, The the beeping sounds a bit sad. It's like a no. It's like it's about to die or something.

Anyway, let's check the continuity. No, oh, that's terrible. Muriel and it is latched. But now let's try that with our gold pros, which is going to be better for the purposes of this sort of testing.

Oh yeah. actually yeah, it's not as bad. Yeah, that's pretty good. I can occasionally make it skip that.

Okay, I'd say that's continuity test and capacitance. almost bang-on That's the resistance there. that's good. enough restrain and turn.

Kate Let's count down a bit and put the hip. good enough restrain and auto range speed. Let's go. Well, that was really quick wouldn't it? Hang on? Wow Oh, that was that's instant that instantly goes to zero I Don't think I've seen a faster hang on.

Let me get the other probes. Let's try this again. I Don't think I've seen her faster auto-ranging meter ready set Wow that's straight in there I didn't even see that range. That's nuts.

It ranges slowly back. It takes its time going back. but wow, that's really impressive. Wonder what chipset they you that? That's that's ridiculously good.

Wow Is that like the best on the market anyway? I Couldn't be bothered warming up my other gear to, you know, test the accuracy, specs and things like that. If you want to see a full review, we'll see it. but I was to crack this open. Now there's no captive screws on the back and one just flew across the room.

So let's try and bloody well get this. That's annoying. anyway. Golden Power Golden Shower battery.

Long life green energy? Yeah, right. Toxic waste in there, no doubt. I'm naive. Old battery.

A lot of people don't like that 9-volt batteries in their multimeters. but yeah, you know, seriously and get RSI yeah, hands just trying to get these screws out because they're going to be a ring sealed and all that sort of jazz. And they're SuperDuper long because this thing's waterproof. and jeez.

alright. crack this turd open and we're in. like Flynn What on earth is that What? Oh, that's a oh that's a that's the big resistor array. Wow, that's not like your traditional ceramic.

You know, a formal one that. Well, that is that is remarkable. Um I think I've ever seen anything like that Anyway, they have tried to shield that. Have they tied it down yet? Look, they're soldered that down, the soldat that down to the top of the crystal and then is the crystal can connected down is I'm gonna I might have to measure that because if it's not, well, that's a bit how you doing.

Um anyway I do like look at the cutouts in there. That's very nice. That's really neat. like in the surface mount diodes there.

That's quite nice. anyway. Ceramic fuses your typical 500 milliamp and your Big Saber brand one. No workers, so that's pretty good.

I Do like the battery contacts there, but anyway, that that's it. That's another big-ass diode. What the? And that's a three? Is that a through-hole surface mounted? That's a through hole that's been budged to a surface mount? Okay, you know, fair enough. Anyway, they say have 10 M here Karen shut, that's bent right over on the side.

That's a bit how you doing. Look at all the song, but you know, look, hey, it's got no shortage of protection. Don't worry about that. Loo.

this. three moths 3p TCS and plus your diode bridge in this other diode over here. Whatever that's doing, but it's big and beefy I'm so yeah, no workers so may actually do okay on that front. But as I said, whether or not it meets the standard hasn't been independently tested and cam aren't really known for.

you know they're highly rated meters, you know? So anyway, is our Bluetooth module for those playing along at home. and let's go down in that would be a letter beer, just an I squared C memory I'm guessing let's have a look at the chipset. Well, that's a Hy 31 31. That's interesting because that's the same chipset that's used in the 121 GW Eevblog meter and also the keysight you 1282 I as well.

and that's and both of those meters are sort of. You know, kind of a little bit notoriously slow on their auto on their owns auto arranging. So how they've been able to implement this I think I might know I think they might be using the because it does have a 50,000 count mode and a 5,000 count mode and they might be switching to the 5000 count mode for the initial thing anyway, which gives you the faster auto arranging. So but it doesn't display 5000 counts, it gives you the 50,000 So their their their software engineers I think have been quite clever to implement that ridiculously fast practically instant homes auto-ranging So I'd love to see their software and know how they do that.

and I reckon we've just got an arm job' in there do we? I'm not gonna so now. 80 mega. It's not an arm, it's an 80 mega processor. That's interesting anyway, so that's a rather interesting look inside.

I'm not going to go further. If you want a full review of this, please let me know down below. but 450 aus bucks. it's an interesting price category and I mentioned this on the forum.

Actually I am looking at having another meter that's coming out very shortly that will be in the hundred and fifty dollar U.s. Of course we're always talking US dollars Yankee bucks a price category. In fact, I could potentially sell it under a hundred and fifty US bucks. and it's sixty thousand account and it's it's going to be sort of.

You know, it's half feature set, sort of. halfway between the BM t35 and the 121 GW So please let me know in the comments. If your interests in that sort of price category, think of it as a sort of like a beefed up BM 235. It's physically larger, it's got the electric field detection, but it is the higher count and it's got much better accuracy.

We're talking like 0.05 percent DC and also 0.075 percent DC Current and listen sub 0.1% Ohms as well. So yeah, it's not bad. so it's an interesting sort of price category. You know you jump up, you're 200 buck up rice category.

And yeah, you've got the 121. GW You've got the BM eight, Six nine, among others. So anyway, it won't have bluetooth. Of course this one's got bluetooth.

So anyway, um, it's It's an interesting meter, so might warrant a full review. Perhaps I mean it's it construction, dire qualities, and it's kind of what I expect in a chem meter. It's okay, you know, and that's nothing to write home to your mom about. and it's kind of fast.

So yeah, let me know if you want a four of you anyway. I'll link it in down below. geez, this one's pretty heavy. Comes from Australia Um, no name, thank you, no name.

call you deep throat for those young whippersnappers. Wait, know what? I'm talking about? What do we got? Cleaning out some boxes our ex work exits work junk from the roof space used from our telecom Australia Special Service Sneakier. Thank you very much Mark Mark, right? Oh, look at that. It's it.

What's a telemeter? It's got some great counter modules in there. They'll likely be a standalone counter modules that great. Oh, it's worth having in the jump in there. They're actually very useful.

Um, and we've got a whole bunch of boards and stuff. So I have a quick squeeze of these up close. I've got a block diagram on the back. Wow - what? HF Hybrid amplifier Oh Check out this Bobby Dazzler Look at the cream case on this telecom astray and on this.

Telstra Rubbish Telephone meter type 3 Date: I'm 87 Wow Made in Japan all the best stuff's made in Japan Ah, just isn't that beautiful. Did that reset that? I wasn't watching I think it might reset that one and that's the total. So oh, it's another. but note what's that I Don't know.

Oops, maybe that was another button. Perhaps that is a gorgeous feeling button I Wish this was field of vision. Anyway, this comes from the Telecom Australia Special Service Network and let's crack it open. Have a look at the gorgeous little counter modules in their old-school screw terminals.

Brilliant And it all just sprung open. Wow Look at this. This is great. Oh, that's just off.

No, just sits in there. Look at that giant solenoid. Absolutely enormous. Oh there we go.

Oh, that's that's how it ticks over. There you go. So just apply one pulse to the coil and it's just going to count up like that and you can reset this one down here. Ah, beautiful.

That's an itchy con cap. thank you very much. It's not a lot in there, is there? Just some sort of NEC problem? What is that? I Don't know. an Op-amp job.

What's up the top? Hey You see one seven, seven once again NEC and got ourselves a spark up there a little down the bottom and there's not a huge amount in that at all. It's just counting. Um, you don't telephone line pulses or whatever. This is some sort of like call counter.

maybe? No. Unfortunately, the problem with scrapping this particular one is that this is not really a usable module. I Thought they might have, like your traditional modules like this are just like a black module like that that you can embed into any project and things like that and you just apply a pulse in and it just mechanically counts like that. And well, this one's not really a usable module is that it's really a custom-designed bit of kit, so unfortunately, that's not something you could really put in your junk bin.

and if you feed a 12-volt pulse into it, you can't fit a square wave. But I'm feeding in a 100 millisecond pulse every second. If you go down to 10 milliseconds, it doesn't work. In fact, let me wrap down the pulse-width time here down to 50 milliseconds.

Now it's still ticking over. Let's try 25. Ah, you can see it. Little tiny flicker.

They're not enough. So 25 millisecond 12 volt pulse is not enough. Ah 30. It just starts to kick in.

So there you go. So there's a five Hertz pulse. There you go. five times a second I Love it.

Can't really do a huge amount more than you know. five or ten times a second. It's just not going to do it and that's ten. Hertz I Can play with this all day I Get to lead this sucker running a 555 and this is a Tell Spec to what hybrid amplifier I like it.

a little handle on here so you can pull it out of the rack like that. and I Love the multi ganged dip switches here. they're they're really quite cool. If you haven't seen those before, they're like this could be triple width.

is it four switches wide there? so you can actually switch four at once? Absolutely brilliant and that would be a two-way one and easier traditional single way once. So I got no idea what this does. Tell Spec Proprietary Limited are the ones who were designed this sucker. and there is a block diagram on the back.

so I don't know Test Access 600 Ohms I Don't know it's a telecoms II thing it needs to what's cuz it's so it's gonna do a lot of driving. Is that like the line load resistor or something like that? I don't know I'm talking at my ass I Don't know Telecom is. but yeah. 3 Kilohertz 800 Hertz They're your typical telecoms frequencies and little plug-in boards.

I Was gonna say that we're still in the age of little color dipped ceramic caps, but that says ah, so that's probably some little thermistor II thing I Would assume these are the sockets here are interesting. They come with these little little plugs and they can't like you have to. They can't go in that orientation because the pins are rotated so you've got to rotate the whole thing around and plug it in. That's fascinating.

Why would they go to that effort? Is there a sin? That's just a shortened link? I'll measure that. yep, shorting link. We've got a baseband data amplifier so I'm sure all the telecom Wizards out there again or telecon Greybeards Gonna tell us what this is aw a look at the old logo there. Ah, brings back memories as well the days when Australia actually had an electronics industry.

Yeah, anyway, nothing doing there. The only interesting thing here is SOT SOT Um, that's not as in like 23. That would be almost certainly select on test. So yeah, they're not populated, but I'm pretty sure that's what the shot there would stand for.

Huh? 10 turn trimmers in there. We'll just run through all these quickly. Hey - what voice switched amplifier? So wow. That beautiful custom transformer Joby Once again, tell spec they still guard I doubt it like the fuses over here.

Nice signaling loop extender, longitudinal noise rejection and ring boost enable earth recall sent circuit. Well, you know all this telecoms infrastructure is quite complex when you know like all these modules of designs are going to a rack and make up a voice telecoms system. I Guess now it's liked it's all done in one. DSP admit baseband data amplifier oh don't surface-mount Oh Rubbish.

Well that's advanced. We've got a date code on there. they're just two yellow 7/4 oh nothing special. but Wow they went with went with service mount couldn't Yeah, maybe they couldn't get surface mount bridge rectifiers there.

so they use the old through old bridge rectifiers. but yeah, and a couple of big beefy diodes up there for protection, whatever that is and some mouldy gang switches yet again. But you see the advancement in technology. Installation instructions for and AF F H a mark 2 June 2001 so you'd expect it to be fancy pantsy and it is.

Oh look at that. Looks like we've even got a programmable device up here Oh ever and progressed to I'm a surface mount tents there. Oh look at the big but go wow that's interesting. Those big hybrid resistors there Wow and a big jumper wire in them.

That's interesting Anyway, are they like 600? Ohm you know, line terminators or something like that? Anyway, Wow look at the big moth protection. They're beasts. but that's not surprising. You know it's got to survive lightning strikes and stuff like that.

so you got to absorb all the jewels and fair dinkum relay in there and the caps would be top quality. year Nippon Chemi-con No workers are to that mouth. Yeah, male fanboys. They go wild.

They go wild 2001 and it's the old are 89 LS series. Brilliant. Yep, none of this 80 mega rubbish. So yeah, you can see how by the 2000s if they've really progressed.

of course they. You know they keep all the same form factor and everything because you've got to plug into the existing racks. But yeah, they do modernize this. I'm not sure the not sure what the micro would be doing there exactly I'm not sure what this card actually does - trolley ax made Strine No workers and from the modern - what looks like the ancient, this is an attenuator.

Look at the big ass power resistor there. Wow, it's an absolute whopper and some big job is over here with their little little ceramic ceramic standoffs. Oh Getting a bit of a woody and some sort of resistor E-hybrid action going on in there and a couple of one yeah, see the date code though. that looks like 84 by the looks of it and this job.

II No idea what that's doing, doesn't tell ya that's an 83 job. just a bunch of and a bunch of Abdullah trainees again Transformers and transistor E's and that's a pleasure. That's a pledge of Wow Well seriously the print on this label is so small I cannot read that. that is ridiculous.

So I need to make the fine glass. so thank you very much whoever set this one in. it's a rather interesting size. It's a like a talk is it a torque wrench? Looks like a specialized oh no.

oh it's a sensor input. Okay, so it's a sensor like wrench to sense how much force you're putting on things very important in you know, military and other a you know Aeronautics and NASA would probably use these for you know, space probe, everything that's got to be you know, torqued up by X amount in your rocket or whatever and the Church of Tesla who realize your potential Church of Tesla just what fanboys out there. Oh wow, another one and that's a smaller one. Cool.

I'm not sure how terrible they're gonna be, but um yes these are ready Wow Wow that's huge and they've all got like little you know libo connectors in the end and and they'll be like a like a strain gauge output. and I've got a Church of Tesla button I Hope it's not like overunity crap because unfortunately when you're a Tesla fanboy it kind of like the connotations are that it's like yeah, free energy over unity. all that sort of jazz. so you can be a fan of Tesla Ah, freeze work.

But yeah, they're the connotations these days. Look at them knowing that's got purple knurling on it. Ah beautiful. Bobby Dazzler So yeah, it's a talky type wrench.

Although it's like it actually measures, it doesn't looks like yeah. I did like it doesn't actually have like work like a real torque wrench. it's actually just a data output one and close playing along at home. Rs technologies.

No, that would not be RS Components Anyway, individually serial numbered 100 pounds per inch. I guess is the metric for that and it's got a data interface I Don't like your chances of getting this apart though, and that is all we can get out of the in there. That's interesting is that that's got something in there that looks kind of weird. I'm gonna cut that opening I'll tell you what that looks for all the world, like a strain gauge.

but what is a strain gauge doing in in line in a cable in heat-shrink like what? I Don't get it. Aha. Although this is designed by and manufactured by RS Technologies, these are. actually.

well. one of the resellers is our PCB Piezo Tronics and they essentially rebadge these and PCB Piezo Tronics I'm intimately familiar with because that was one of my Jobs was doing lots of acceleration and drop testing and stuff like that. So these this is a PCB Piezo Tronics accelerometer. a tiny little accelerometer that you were put onto your object that you're trying to measure the vibration or shock response off and you can play around with those.

I might do a video on that one day actually building a little amplifier for it and stuff like that. Anyway, yeah, basically this is going to have a wheat stone bridge in it and I've got the datasheet here for it and we can have a look at the specs. So it's basically a bridge. a Wheatstone bridge in there which then we need a proper amplifier.

I've designed those back in the day I don't think I have one here so you know we're not going to get. You know, really good results from trying to power this thing up here on the mailbag anyway. But yeah, these are like real expensive. but it's a kit and you can get like these little handheld amplifiers and display readouts for them so you could do like you know, field testing.

you get under your you know, your Boeing aircraft or whatever and your check the torque and each one of the bolts and things like that and you mark it down and uh or you can automatically record it and things like that. So yeah, these are these are very valuable bits of kit. These are sensing torque wrenches although and they're basically a transducer. Talk a wrench.

They don't actually do the talking themselves. you've got even for like, a post-talk inspection kind of thing. Or you do it by hand until ya die until you get that exact reading you want on the display. So that's very cool.

Thanks for sending those in. The others will be identical and I can't see anyway. I Think you can actually screw the inner part of that out or something, but I haven't really had any luck with getting this apart anyway. They'll just be a Wheatstonebridge strain gauge in there and there's no internal circuitry at all.

Be taking it straight out. but I still don't know what the heck's going on there though? Well, on second thought, is that some sort of like little temperature sensor and it's doing some sort of temperature compensation perhaps? Hmm. I think we've got a second suck at the SAP this is from Kevin guy I remember the pronunciation which I goofed in the wrong one in the previous video. The toughest one was that literally the last mailbag penny waiting.

Thanks keV Good day and are you gonna be careful? Oh that sucks of the SAP kind of too many. It's actually something from it, did you? Kate Oh, it is I think it is. Look of it. it is so very nice.

Wire wound resistor. she's hollow, it's on a ceramic format and well resistor. Oh yes, of course because um, it can't. This is just the digi-key receipt because I didn't have a powerful enough AB Well yeah, I didn't have my high wattage one.

This is a highways as a hundred watt 1k resistor suitable for testing caves. Nixie tube high voltage, hundred 80 volts load thing so he sent me the matching resistor. Nice. Thanks.

Give actually more to the point. This is an adjustable resistor. See this lug in the middle? You literally screw that in to the point along there you want and that will give you your assistance. Value: anywhere from 0 to 1 K Thank you very much Robert K Um, this is like eight yet Chinese a packet.

Think it's says spoil it, let's open it up I don't know exactly. doesn't really spoil it for me Eve I don't know what class of item I'm getting I don't know exactly what type of item I'm getting but what it is. So user manual. oh no it's not I thought it was something else I thought it was a display for that CRT scope that I'm I'm still have to upgrade Anyway, we've got a yard.

a bit cheap. Oh dear. So Oscilloscope. This is like one of these, You know? I Don't know.

Thirty buck do you sell oscilloscopes something like that? So yep, Oh check it out I'm gonna do a quick pair up. It's not gonna be a fool of you of course, but whatever. Play! Now This is a little open source do-it-yourself kit. An oscilloscope.

This one comes a fully assembled. It's probably the cheapest oscilloscope in quote box you can actually get I can get this on eBay for twenty three Australian dollars assembled, delivered. so its anyway. I Believe this is a clone one in quote marks because it's I believe the original.

Please correct me if I'm wrong is done by Jye Tech. but this one doesn't have like the same logo as the original I guess. But it is open source so anyone's allowed to actually produce this. Really? So Yeah, it's just a little.

well let's have a look. So as I said, it's actually a kid and this one actually. the instructions are really quite nice. Look at this: I I Really like this so it's like a beginner kid.

You know it's cheap enough to get for this. and there's a troubleshooting flowchart as well. So huge thumbs up to the documentation for this thing. Absolutely brilliant.

Whether or not Jye Tech did that or the company that sold this one did that I Don't exactly know, but there's no jail ie. Tech branding on this and there's the schematic for those playing along and I'm It's basically just an micro and a little bit of an Op-amp II front-end and the specs aren't anything to write home to your mum about. Let's have a look one. MIG sample per second 200k analog bandwidth 10 millivolts to division to five volts per division.

50 volts to the peak. It's going to stand up one: mega ohm input and it does have a B and C so you could presumably use standard pros with it. I'm it is 12 bit resolution though I'm a 1k of sample memory but you know, like yeah, it's this would have been kind of novel like 25 years ago, like it would have been useful, but I think you can argue it's still useful these days. Ok for them, you know what else can you get for you know, 25 bucks and delivered or possibly even less from that I haven't even looked on Aliexpress yet.

So anyway, yeah, the form factor there I Think that Jye Tech 1 comes with like perspex cover on it or something like that and it's a bit more expensive. It's in the 30s of dollars a range, but in Yankee bucks at that. So anyway, there's a USB that's for power is it? I don't think it actually does. Can you get data out of it? Well, turns out you can't pair it from the USB That's pretty disappointing.

You got to pair it from a 9 volt. DC up here doesn't have to be 9 volts. DC It's just got a 78 L5 and series diode protection there and that's about all she wrote. so just favorite rail.

Let's drop them down to 3.3 But yeah, the USB has just got a test point on there. can't pair it from that. Oh alright, so I've got a 12 volt input even though it says 9 volts that caps 16 volts. So I think she'll be right.

And yep by Jye tech. There you go. So it does actually has the firmware for it. Attention: You can verify kit authenticity.

There you go by sending let's let's let's have another look at that. Hey guys say but it is open source I Believe Do not help feet. The police report fake kicks in kit seller This same is legal to run this firmware from same deer. So from same smart.

oh there you go. So yeah. I Guess Jye takeout. Happy that people have been cloning this sucker.

Anyway, that's a nice update. Speed on there. Don't mind that let's plot some signals in there you go. There's a one kilohertz, four volt peak-to-peak sine wave and not sure that little kink is in there that that's not my function.

Jen So something's a bit how you're doing there and it's like you can really see that it is quite quite sharp. So yeah, it doesn't go crazy when you change the gain there and there we go. It looks a bit better there. No there we go.

that's nicer that's nicer so looks like I'm point one likes. yeah see that gives you some sort of weird thing happening there on times five I Guess Sensitivity times five Gain So oh ed two times five. You'd think that'd be greater, but it gives you less. Okay, it's back to front.

Well, it's back to front. What? I think it should be Anyway, so yeah, it's very simplistic, but hey, you know works. but yeah, like there's no real controls. Okay, plus - okay, that's real time, but like it would have been better if they were labeled a bit better.

Oh Start: See some a lesson will we Way: Oh yeah. look at that. Terrific. That's really I Only see and look at the low frequency signal that's a listen to.

Wow. Wow, that is the same way it's going to do. that as a sine wave all sorry clear on the screen. it's gonna do that.

Yeah, that's that's terrific. So I Select we've got Auto haven't haven't read the manual at all. Positive Negative trigger: Don't know how do you change that? There we go. Positive or negative trigger: no workers.

You know it's like it's really basic. We've got some Madhurima compensation caps up here and stuff like that, but you know it's great for a beginner. Hey, you know, for your twenty bucks or whatever. if you can get this like sub 20 bucks to build this up as a kit like it's going to be a nice little get to build combination of our surface mount and through-hole stuff and things like that.

Let's actually take the can we or is that sold it in night? So yeah, if you get that as a kit I'm all is all the surface mount stuff done and you only do the through-hole Yeah! I think it's only the through-hole stuff on there I think it might come yeah, pre surface mounted and then you've just got a yeah. assemble the rest of it so you know it would be nice if it actually came with. uh yeah. Maybe some people out there do sell a kit where has surface mount and through-hole so you know that would be quite a challenging little kid for a a beginner, especially with the relatively fine pitch quad flat-pack in there.

You know the Esso is fairly easy, but yeah, that would be that would be a nice little do-it-yourself kit. Look, it's I'm not even gonna bother to like. check the specs and things on this, it's just you know it's it's a 20-buck little kit is still escape what do you want and you know does alright. I think Anyway, good on Jye Tech and they're obviously not happy about people clone in it.

But I mention I Saw mention of open-source somewhere, but maybe it's not. Maybe people have just cloned it and yeah, but you know I sharp trace in there and 100 kilohertz bandwidth as a 100 kilohertz. Oh, it's not triggering too well, is it? I didn't change anything I just it's a hundred kilohertz. Doesn't like that it's got a 50 K Oh I Still doesn't like that I assume that's the trigger point over there that's got a hold motor running mode.

Yeah, really doesn't like the trigger on my Haven 50 kilohertz. Let's go down to 10 kilohertz. and oh yeah, we're triggering at 10 now. So yeah, user interface is clunky and it's banned with us.

you know, audio bandwidth basically. And hey, neat little kit. I'll link it in down below if you want one. I'll try and link it to the genuine store.

So yeah, you know that's that's really neat for the price. Really? Yeah, Especially like these things are insanely cheap these days. I Mean to get imagine, like 2530 years ago to get something like this? this would have been magical. So thanks for joining me for another mailbag.

probably the last one for the year almost certainly. And yeah, I will be taking some time off in. January So I don't know what's going to happen there. But anyway, if you liked the video, please give it a big thumbs up.

And as I've been saying that lately, please subscribe to me down below on Library TV LBI White TV I'll put the link to my channel down below I've cracked a thousand subs and I'm trying to beat Barnacle Ease and he's got like fifteen hundred subs or something like that. So yeah, I will do a video on library Io TV relatively soon promoting that. So yeah, I Think it's a really you know it's coming along as a really good, decentralized content alternative to YouTube So yeah, it's really coming along. Check it out, catch you next time.