EEVblog

[@KeanM]

The PocketSprite PCB designer has a sense of humour... "Nothing to see here... I can tell you this thing is way more interesting with the display than without." He probably never expected his 'easter egg' to appear on EEVblog!

[@douro20]

Has anyone done any videos on the easter eggs in Compaq products?

[@leisergeist]

@@douro20 Compaq did that stuff a lot? Neat! Hardware easter eggs are always fun

[@jon_raymond]

Did you catch the "Magic Smoke" capacitors below the screen as well?

[@KeanM]

Aha... "Spare Magic Smoke" - well spotted!

[@KeanM]

Turns out they also sell this as a kit for "hackers", so it isn't quite as big a secret as some commercial products not intended for end-user disassembly.

[@tookitogo]

German Geiger counter lingo dictionary: Betriebsspannung = operating voltage Aus = off Messung = measurement Nachweis = detection Werk-Nr. (Werknummer) = manufacturer's serial number

[@EEVblog]

Thanks!

[@ZomB1986]

Kopfhöhrer = headphones. Funny how that ground symbol goes straight up.

[@thewhitefalcon8539]

and €2.50 = two and a half euros (not two hundred and fifty)

[@poldiderbus3330]

I have one of these counters - after switching it on, at first you end up in the "Betriebsspannung" (operating voltage) section and have to adjust the output voltage of the voltage "regulator" (smaller dial on the side). The pointer must point to the last line of the scale. Then you can select the range in which you want to measure. The last section where the shielding slides to the side is the gamma and beta detection mode. For the normal gamma mode, the mica window is closed/shielded. The little bag is for humidity control, silica-gel I guess.

[@EEVblog]

Cool, thanks.

[@samgab]

13:56 "NOTHING TO SEE HERE + I CAN TELL YOU THIS THING IS WAY MORE INTERESTING WITH THE DISPLAY THAN WITHOUT"

[@milesidotorg]

13:41 "SPARE MAGIC SMOKE ->"

[@hyperplastic]

I really like the new regularity of mailbag Monday, even if it's shorter and filmed in advance.

[@ToTheGAMES]

To be honest, everything is filmed in advance. ;)

[@vincei4252]

Mailbag Sunday Afternoon :)

[@MrHD71]

hahaha for 90% of the world. like us ;)

[@IscleGaming]

Mailbag Sunday night :P

[@connermalloy]

When you're down under It's Monday when you want it to be

[@BodziuM]

Mailbag Sunday :) 5 min to Monday

[@Mromfgtrololol]

2 minutes, to midnight!

[@pierro281279]

OMG ! Leo Bodnar ! Never thought of seeing him here ! I've bought a lot of electronic stuff from him, for flight simulators. You should look at his website !

[@janbottorff4642]

I have one of those exact pulse generators, and an old Tek 20 Ghz sampling scope that can accurately measure the risetime, which is as claimed. I highly recommend these devices! Leo has clearly done a great job of delivering an excellent performing device at a good price.

[@anlumo1]

17:15 Anderson Powerpole spotted! Although in an unusual arrangement and color, probably so it's not confused with a power connector. I just love those connectors, they're so easy to use and can handle up to 45A.

[@prismstudios001]

The visual asthetics of that Geiger counter is amazingly appropriate for the Fallout universe...

[@jackwhite3820]

27:21 that board was reflow soldered on the top first and then wave soldered on the bottom. I'm pretty sure I even learned this from you, Dave!

[@FarnhamJ07]

Portable CD players outsold MP3/&c. units until 2005; not so sure I'd say that's "not too long after" that '93 unit!

[@TheFrankvHoof]

>250 euros Uhm.. That says €2.50

[@00Skyfox]

Instead of "puff", ps should be pronounced "piss". Industry standard I imagine.

[@IDoNotLikeHandlesOnYT]

Or maybe "pass", to go with "puff"?

[@GilesBathgate]

Is it already Monday? Not here, I guess the earth isn't flat then ;)

[@mbn65]

I have one of this geiger counters. It came with 2 detectortubes with different sensibility. The end caps of the tube differs in meassure and when fitted in the meter, different scales are engaged depending on with tube. It's a realy nice piece of equipment. Super good engineered and the mechanics is just so good.

[@jackm_]

@10:29 next to "Delay" is "Set horizontal position" :) in delayed timebase it's set at 0s, in regular timebase it's set at 10%

[@profpep]

Padded 'RF Shield' is probably a Silica Gel bag, to keep the insides dry.

[@Tangobaldy]

It was a tea bag

[@kjetilv]

Great to see it back to a regular segment ;)

[@awesomeferret]

I think you severely disappointed a few people at 13:56, lol

[@kriskroski9664]

My phone doesn't have a headphone jack, but my geiger counter does.

[@johnfrancisdoe1563]

Kris Kroski Critical when not wanting the locals to know the measurements.

[@userPrehistoricman]

Imagine Bluetooth headphones for your Geiger counter haha

[@WacKEDmaN]

STM32 is not ESP32!..someone screwed the pooch there!..great vid..thanks Dave

[@notvelleda]

WacKEDmaN The official technical specs say it uses an ESP32... so you're correct

[@JamesPotts]

Still like atmel designs, and still hate PICs. That didn't change with the purchase. 😉

[@rdbanks2823]

I’m either incredibly late to the party or marginally early - either way I love mail bag Sunday - glad to see it appear on my sub list!

[@TimSavage-drummer]

Send that Geiger counter to Mr Carlson

[@mfbfreak]

Tiny bit of advise: the Eroid capacitors like you can see in the geiger counter, are plastic-encapsulated paper capacitors. They're less shitty than an average paper cap, but still in many cases a bit leaky. The mustard colored ones are Philips brand polystyrine caps AFAIK, and almost always in perfect condition. The little mesh thing can be a desiccator. The white ceramic things with end caps are rectifiers for the high voltage, i think.

[@wangyeeee]

11:00 You should go to your dumpster to find a better scope...

[@rabidpb]

The Discman PCB is wave-soldered on one side and reflow on the other. Must be easier than worrying about different melting points for two passes through the oven.

[@BassDrivenMassacre]

What did the note say on the other side at 12:51 ?

[@-dazz-]

Leo Bodnar? What a small world. I've bought a couple boards from him in the past. Good stuff, and he's a really nice guy too, willing to answer my noob questions

[@plaws0]

RA - Right Arm LA - Left Arm LL - Left Leg

[@johnfrancisdoe1563]

That Phillip battery tray for 4x1.5V could probably be replaced by a 6V rechargeable stick such as 5x1.2V . Too old design to anticipate the LiPo voltages obviously.

[@chaozz]

€2.50 means 2 euro 50 cents, not 250 euros. I had to correct that as a fellow Dutch guy.

[@cannesahs]

15 cents???

[@chaozz]

@@cannesahs no.

[@Acecool]

German: Aus = On, Betrieb is work, Spannung is has to do with electricity / power or voltage so operating voltage for Betriebspannung. Messung is measurement. -- There is a nut on the outside - flat-heat you can pull off... A lot of these old devices are made to be as small and compact as possible as they're probably meant to be portable. So there are a lot of little tricks to removing parts and parts end up being dual-purposed so a bolt may be hollowed and turned into a threaded holder for something else to bolt on, or what-not... Could be for a sling? It is probably designed so you can take the entire inside out in one swoop - or it is built up from the inside although they may have presoldered things to save time - etc... ie they likely would've added nuts / bolts to areas inside to remove everything at once - or most of it... Because if you have to desolder layer by layer it'd be harder to manufacture - be ok for a prototype, but not for mass production or even hundreds.. I could be wrong, but a lot of snug-fitting stuff is usually built to it can easily be removed - especially since they went through the trouble of adding that back cover - they could've made it a lot harder to get into.

[@dominickpastore]

I figured when the one package said, "Open with proper knife only," it just meant not to open it with the utility knife you sometimes use :D

[@Merlinkatamari]

I have a replacement tube for it

[@gblargg]

26:31 THREE battery terminals. But the battery pack only has two (23:09). At first it looked like it gave a split +/-3V supply.

[@mike7958]

How about a link to your letter opener?

[@perhansson6718]

Dave, have you turned the analog Tektronix scope upside down so it wont believe it's down under? ;)

[@Psychlist1972]

Ok. So the IUD in the thumbnail was from the defibrillator test kit. :)

[@dangerotterisrea]

Bloody beautiful Dave, I am enjoying these...hope they aren't too much of a pain in the arse to sort out and will continue for a while!

[@alch3myau]

Do you have a foot pedal for the zoom when you do close up vids?

[@100SteveB]

Northants = short for Northamptonshire.

[@userPrehistoricman]

NORTHANTS Never understood why it was usually in caps on letters

[@frigzy3748]

The reason they made the battery block sliding out - most likely they offered a rechargeable battery of same form-factor. That's why 3 terminals are coming to the battery - positive, negative and a thermistor.

[@kjetilv]

No, there was a DC input on the back (I had that at some time), but you could get a rechargeable pack for it (or just use normal rechargeable AA's)

[@zvpunry1971]

The connector on the cable of the defibrillator demo device looked like small anderson powerpole connectors.

[@JWH3]

That geiger counter might be trashed but it looks like it'd bad a nifty project case.

[@SwitchingPower]

25:10 Hoofddorp is a city in the Netherlands (literally translated as Main Village)

[@xspager]

Hello from the other side of the planet, nice Sunday mailbag!

[@JamesPotts]

That defib tester might very well be designed for verification. A sales unit wouldn't go through final certification, so it would carry a not-for-use label. We have plenty of avionics gear at work with similar labels.

[@SergiuszRoszczyk]

I wasn’t digging that much into this AED device but isn’t that a resistor network on the left of ROM chip? It looks like it “plays” 8 bit data to the resistors and outputs them into sensor ports. It would be well played, I don’t see any other reason for this kind of memory paired with ATmega8 which is incapable of external memory bus.

[@rdbanks2823]

Gonna add, nice board layout and silk Leo!

[@keithstevens1713]

The board on the back is maybe an fm antenna

[@frankgrudge8823]

Always wondered what Dave's music of choice would be the Oils hey!

[@jaccurtis5789]

Anyone else in the UK where it isn’t Monday yet?

[@valvemonky4734]

ye still sunday

[@andymouse]

I'm in south east England......could be Monday then again could be Wednesday ….just cant think

[@bostedtap8399]

I will let you know tomorrow.

[@GeekIWG]

Sunday here in central USA

[@simontay4851]

Im watching this at 2am Sunday night/monday morning.

[@Keksstar]

To the first one: Yes, "AUS" means OFF and the red "Betriebsspannung" means "operating voltage". Greetings from Germany ;)

[@godamgoderich7031]

What is the word you're saying 0:34? Mystery for me

[@GeekIWG]

He's saying "Bueller? Bueller?" I believe it's a reference to the movie "Ferris Bueller's Day Off"

[@AnonymousUser77254]

Godam Goderich I'm not Australian but sounds like slang for beautiful.

[@ZoeyR86]

Anderson poll connectors on that AED lol aftermarket automotive connectors from the 80's still a good connector just modern automotive denso connectors have weatherproofing.

[@MysteriousFigure]

know Leo Bodnar quite well, as his main niche is making products for the simulator market, and I have to say that they are quite good!

[@rich1051414]

The shielding is from the motor, I am sure. Anyone ever try to install a fan into their audio amp without thinking about placement/shielding first? Only once :)

[@OsmosisHD]

Groeten terug uit Nederland! PS. Why not make a 10 minute repair vid of the Geiger counter? surely it has some historical value.

[@jackwhite3820]

I'm sure it has historic value, but it's not going to be repaired in 10 minutes.

[@OsmosisHD]

The magic of editing...

[@RolfSte]

Hi Dave, I like your blog very much and I learn a lot. With the help of your soldering tutorials, I'm now starting to solder SMD's. What's about the soldering smoke escaping from solder - may it with Pb - and flux ? Does it harm an hobbyist like me, who solders not every day ?

[@martinziefle1647]

Batteriespannung means Battery Voltage

[@Fee.1]

That’s a knife!!!!! And yea you can tell that’s built to be handled by someone with 5” thick gloves. I’ve actually been watching you when I have spare time for years. I miss your plasma videos, I miss plasma tv’s in general, at least until OLED motion handling is able to match what Plasma could do. And speaking of which, Leo Bodnar as in the designer of the monitor latency test equipment ? Unfortunately I find myself wanting to understand something on a deeper level far beyond my understanding, which isn’t much, I’m wondering if you’d be willing to answer some questions about the best way to measure and log/visualize DC current output after a transformer (12v battery charger) A DC current clamp would cut it for a single sample, and may even cut it for measuring ~1000A from a starter if I pay for a decent unit, not sure if that would be considered inrush current or not. But if I wanted to monitor the output/behavior of a “smart charger” over time, how would I best go about this? Lastly, can you suggest a online source for electricity basics on up as I really wanted to learn more. I would like to be able to test all the clone clamp meters accuracy & such Eventually

[@nagasainathkoduru9995]

Any ham radio stuff ??

[@michaelfogarty3239]

had 2 of these used as a DJ

[@michaelfogarty3239]

portable CD player

[@stonent]

It looks like they're using a resistor ladder DAC next to the ROM on the defib tester.

[@userPrehistoricman]

More likely to be pullups for the ROM. Look at the location on the board. Surely it wouldn't make sense to be there?

[@coondogtheman]

Mailbag Monday after the Pats game on a sunday night. Dave you should tear down a Hasbro VideoNow player. those are a series of video disc players for kids and they had cartoons on special proprietary format discs. They are similar to a CD player but instead of music it has digital video. I'm guessing they have a special chip or software on a chip that is doing the decoding on the fly. I was wondering if there was a way to convert the data on the discs to something that can be viewed on a PC like an .mp4 video file.

[@fd3871]

For the plebs among us (myself included) why would that device require export authorization?

[@TheDefpom]

Hey, it’s Monday, well done 👍

[@connermalloy]

Happy 'monday' lol

[@Boffin55]

Holland is just part of the Netherlands. The provinces of North Holland (Amsterdam) and South Holland (Rotterdam, The Hague). Just happens to be the two most populated.

[@simontay4851]

I thought Holland is just another name for the same country. I call it The Netherlands.

[@Boffin55]

It's not. It's like the difference between England and the United Kingdom. Check out CGP Grey's video on Holland v Netherlands.

[@Mr.Unacceptable]

Our local second hand shop here on the West coast of BC Canada has a Transonic parts box for an old scope. It looks like the box contains all the accessories and attachments for a Transonics scope including the photo taking head. Whole bunch of parts and pieces everything but the actual scope itself. It would be for something like this. vintagetek.org/wp-content/uploads/2017/09/type310A.jpg It's been sitting there for about 6 months. It's just going to get broken and parts lost if someone doesn't buy it soon.

[@Fee.1]

And actually if you happen to have a clone brand DC capable clamp meter that can measure Inrush, I’d be fascinated to know if it’s capable of of DC inrush measurement, even flukes meters that are capable of it aren’t reflected as such in the data sheets and sometimes directly suggest they aren’t, which leaves me wondering how deep that goes.

[@Jackaoz]

Dave, get that traceable out in the wild. Come on get some geocaching happening.

[@EEVblog]

Ok, I'll do a 2nd channel video!

[@kjetilv]

Nice to see it's in the wild now, thanks ;)

[@jwgfoto5419]

Loved the FBDO reference!

[@paulg.3067]

If I remember correctly the mp3 codec came somewhere after '96-97 on my computer (from a CD of a PC-Magazine ) and that was quite a hype! Everyone started to convert their whole CD/Tape/Vinyl collections to mp3. That was the time where Winamp was really cool. But I still owned some third-last-gen walkmen in 96-97. They were beatyful, the heyday of mechanical constructed tape devices (esp. those full metal ones). They pushed the compactness to its limits and I always prefered them as the CD-Players. It was porn to hear how the tape tray opens and closes. After that time they still produced two or three more generations of walkmens but they were all just crap as the market was dying and they pushed it a bit by making fancy walkmans in the weirdest colors/forms... the good ones already died at that time. For me personaly '98 was strange year... something like a transition to the digital age, everything went digital. That was an amazing time and a little bit sad. Remember AOL dumping the world with their Trial Internet CD's?

[@betamax80]

That looks like the Phillips mechanism? DataBits did an amazing comparison against the Sony mech. recently.

[@johnfrancisdoe1563]

betamax80 Why would they used a Phillips mechanism, it's not like they are related in any way...

[@CableWrestler]

Northants is short for Northamptonshire

[@pauldeboer]

2.50 is not 250... just saying.

[@EEVblog]

Easy when you aren't viewing a small camcorder screen

[@demoncloud6147]

Atmel Fanboys are now Microchip Fanboys ! - Ahhhhhhhhhhha !!!!!

[@SkyCharger001]

and unless you are familiar with the font used by cheap price-tag printers the decimal blends in with the 2 as if it's its serif.

[@Damicske]

@EEVblog: The geiger counter is in German, so next time YELL at it :D (Aus= off / betriebsspannung= operating voltage)

[@aronhighgrove4100]

Nobody yells in German, except in those badly made American movies, with those stereotypical bad guys you only see (and only existed in this form) in cheesy movies.

[@AndreDeLimburger]

I used to have a discman like that.

[@alexreeve]

"Betriebsspannung" = supply voltage , "AUS" = off :)

[@hygri]

Dave, send that Geiger counter to Mr Carlson, I'm sure he'd love to get his hands on that :)

[@UpcycleElectronics]

Chillax Dave, your guilting me for my sunday evening couch time... I feel like I need to get up and 'take som-thin ap-hearrt' Thanks for the upload. -Jake

[@solderwickie]

It says "Frieseke & Hoepfner" on the small tube. They made spotlights and obviously other tube too. Btw. greetings from Erlangen ;)

[@Mehrunes86]

I got an transportable cd player, back in the days, got so tired of using it, so i copied my cd's to tape and using my super cool sony walkman.

[@deannascott3475]

AUS is for Australian Army...Many Army items are marked for the country...(My dad was an US Army Paratrooper and he brought back a couple large spoons from a kitchen and they each had a large U.S. marked on the spoon handle...

[@Hiddensoul]

In this case AUS is German for OUT I am an Aussie and yes AUS is used for Australia but this is a German Counter so it is in German not English

[@alexreeve]

in german it just means "off" :)

[@Keksstar]

AUS means "OFF" - it´s an german device.... Greetings from Germany ;)

[@SoldererOfFortune]

Dave, you should look into the ESP32. It is an amazing module, check the specs out!

[@alch3myau]

"Welcome to mailbag monday" doesnt sound as good as "welcome to everyones favourite segment! Mailbag!"

[@FarleyHillBilly]

Speed of light = 33pS/cm

[@natedawww]

Hi Dave, would you consider ever doing a video on SMD Soldering Tweezers? Thank you for the great videos! Watching from sunny Los Angeles.

[@martinda7446]

Got to find something for Dave to teardown/destroy - maybe he can just stab it with his knife or beat it to death with a foreign made oscilloscope...I know Dave apologised in advance, but it was still painful for us types with a nasty case of VD (vintage damage sensitivity).

[@6Diego1Diego9]

what's a brick dunny?

[@simontay4851]

Brick Dummy. Something thats built really solidly is indestructable.

[@m.k.8158]

to be more exact dunny=toilet or outhouse In the USA, the equivalent phrase would be "built like a brick shithouse"

[@EEVblog]

A dunny made out bricks.

[@pXnEmerica]

Nothing to see here. I can tell you this thing is way more interesting with the display than without. Someone expected Dave...

[@Pillowcase]

you should send that tester to mikeselectricstuff - i'd love to see him playing with those defibrillators he has.

[@fouzaialaa7962]

microchip bought atmel ???

[@johnfrancisdoe1563]

fouzai alaa Yes, another of the destructive monopoly building buyouts going around as the anti-trust legislation has been neutered by lobbyists and right wing politicians. Hopefully the Chinese succeed in blocking the NXP buyout.

[@meande-man5351]

I want that Geiger counter!!!!!!!!

[@ahbushnell1]

voltage regulator gas discharge tube

[@joppepeelen]

No you cant move a gear that is on a wormscrews... that is kind of one of the things with them they can move the next gear not the other way around :) funny philips neede to put that on the cover that THEY invented the CD.. and the infamous dcc haha , should be CD and the Compact cassete on there

[@SimoWill75]

23:15 meh, 1993? Citizen CBM1000 had sliding battery tray in 1987

[@DrGreenGiant]

What the hell is "bula"??

[@tookitogo]

See "Ferris Bueller's Day Off".

[@TheSphere1729]

kzbin.info/www/bejne/hIGTnoSbgbx2edE

[@DrGreenGiant]

Cheers folks. I'll go and educate myself haha

[@joopterwijn]

Damn,... Sunday 23:45 !