Dave I am upset that your not using the giant knife for 100% of mail bag openings. I think I speak for the majority of the community when I say that the giant knife is the most appropriate tool for opening all packages. If science has proven one thing it's that giant knife + mail bag opening = enjoyment. I want to lobby for an even bigger knife, perhaps a Japanese sword ? Or even a low yield explosive .
EEVblog I can spec and supply you with some custom shaped charges for a nominal fee. Licensing restrictions and international hazmat shipping fees may apply.
16:40 hey man, a little heads up from lonesome me; I like it when you show postcards. I've never sent one in, but I enjoy the little personal touches in between the seas of technicalities and advanced electronics
Totally agree - helps to know how far and wide Dave's fans are, and the more obscure the better, I'd say - just skip the postcards from common cities and landmarks (I've seen enough postcards of the Eiffel Tower, Big Ben and the ESB)
Bubble memory: There is one main loop and a number of minor loops off the main loop. Since it works like a shift register, the sub-loop approach allowed faster accessing.
Don't ever go to a simple box cutter, the big Crocodile Dundee knife is a trademark for the past few months, loved it when it was introduced, want to always see it. Just be careful with that crappy dusty packaging you sometimes get!
Actually a carpet knife would be better because you can control the depth of the blade and have less of a chance of damaging the contents. The big Bowie knife does raise the cool factor though.
Yes Dave.. you should always read the note in a package first. This way if someone would send you... let's say... a delicate solar cell you won't risk breaking it.;)
nickoe The cell was packaged well enough to arrive intact, which strongly argues it was packaged sufficiently well. It's never the tool's fault, it's the tool user. It was the ripping with bare hands part after the knife couldn't do the job that killed the cell. The problem with the big knife is simply that the point is a foot away from your hand, and controlling it accurately is far harder than with a smaller knife. That's an inherent problem that doesn't go away even if you're skilled enough to do the job successfully anyway. it's just the wrong tool for the job -- or at least for many of the jobs involved in opening packages.
It's got a bit of infamy in the arcade world; Konami used bubble memory in their "bubble machines". When started from cold, the machines always played a tune while the memory warmed up, since bubble memory has to be at about 30-40 c to work properly. The game roms themselves were stored in bubble memory cartridges. Sadly, very few of the machines still operate. Turns out, bubble memory did not make the best medium for long term storage of program rom.
Wow, I haven't heard bubble memory in years. When I was working on the F/A-18 they were still using core memory in the on-board computers, bubble memory would have been a step up!
Any chance bubble memory that old would still be functional? I would love to see someone integrate something like that in a modern project, just because.
It really does. And show how it is operated. I remember using one at university. The entire mechanical aspect of it was very neat. Cranking on the dial and getting the meter to zero. I hope it happens. Dave, you reading this?
Not quite, as when they spotted it, just up next is the X-ray. They put it through, surely and by next minute they do know that´s only electronic stuff inside.
Bubble memory seems like it would be really slow. Other than that, those pegs seem pretty interesting, though they should make a copper screw that can go in flush in order to allow for multiple pegs to be installed and then a single large heatsink placed on the other side (e.g., a multiple high power LED array).
I had a homemade speaker amp on a protoboard powering the speakers in my office, and everytime the air conditioner turned off, the speakers popped very alarmingly, and that aluminum tape covered box looks like the solution I made until I found a proper enclosure I could use xD
Those PowerPeg heatsink attachments are REALLY interesting. Such a interesting and original idea, I like it! The provided demos very good examples of how they can be used. I agree that the datasheets seem very well documented, something I personally wish was more common. I hope they become very successfull.
I'm probably the only one, but that scope on the shelf behind you is upside down and I always notice it every week. I just want to run in there and fix it.
Hi, I was wondering if you can do a a teardown on some Automotive PCMs to demystify their deep dark secrets and their inner workings! I love your channel and boy that's one big knife! You would make Crocodile Dundee jealous!
Question: I have several of those small 5V 9V 12V Power adapters and I have tested several and I have found some of them to have low output which means off to the landfill and most of them are either right on the money or just a little over like 13.87 for a 12V. My question is are the ones that are considerably over still viable or maybe not like 15.28V for a 9V or 17.79V for a 12V?
Very cool mailbag items this time, Dave. But i demand more BiiiiiG "knifin´". Just because it is -- more or less -- your mailbag "trademark" ;) If these PowerPegs had been there when i designed that heat sink for some SMD power mosfets back some 5 years ago, it had saved me some days!! In the end we used some M3 copper screws underneath the mosfets along with some complex wholes resulting that just the screw head was touching the backside of each mosfet.....
Could you do a teardown of a BLUETOOTH speaker? I ask because they are the hot items right now. From cheap to very expensive. They all seem to have audio over BT, Lipo batteries and internal charging, voice prompts, NFC for pairing. I just wonder if there is just a single really clever chip inside that manages all of this. Some even act as speaker phones. I'm guessing from cheap to expensive they are all basically the same circuits while the expensive ones may have better amps and speakers. Just curious.
I got a freebie from my mobile company. I was thinking they must have a 1/2 chip solution going on, and if they are going free there must be a surplus of cheep chips flooding in.
+Brady Rose i can fix a knob in 5 min like there s worst things"theres nothing worst than a knob breaking of" yeah right HAHA!!!!!!!!!!!!!!!!!!!!!!!!!!
I first heard about bubble memory when reading about Konami using it in a version of an arcade board they made and ran some versions of games like Gradius and Twin Bee. The BIOS would have to wait some time to let it warm up for best operations but it's a shame that it wasn't so reliable, a lot of the old Konami Bubble systems no longer work due to the data being lost, but this is the issue with magnetic media
Hi Dave, I have been a subscriber since you posted the "white and nerdy" video and have enjoyed all of your videos ever since. I am from Eritrea and my heart melted when you showed that post card from Asmara! I could never have imagined a post card from Eritrea show up on mail bag on EEVBLOG. Anyway cheers and selam! SK from Asmara Eritrea.
11:23 Thanks for destroying the magic of TV for me, next you'll be telling me that Jimmy Savile was lying when he told me I was his special little guy :'(.
"Oh i think we need to set CRL to 1163...... OK Wake me up if you got it ..." Isnt there a "speed gear selector? :D thats why development takes so long
It is derived from the colloquialism, "fair suck of the sav" common in Aus/NZ - "to have a fair suck of the sauce bottle" (i.e. booze/drink; "Sav" is a contraction for "Sauvignon" - i.e. "Cab Sav" would be a "Cabernet Sauvignon" wine). To have "a second suck of the sav" is to take a second drink from the bottle (if one was drinking from the bottle and offered the friend a sip - said greedy friend would then be pushing their luck by taking a second sip/gulp from your bottle). Hope that helps you understand some of our Aussie slang :)
You know it's a good day when there's an EEVblog, Mike's Electric Stuff & an Applied Science video in 24 hours! :)
the best youtube has to offer
Right... I've been missing me some new EEVblog vids.
Don't forget Alan of w2aew.
Dave I am upset that your not using the giant knife for 100% of mail bag openings. I think I speak for the majority of the community when I say that the giant knife is the most appropriate tool for opening all packages. If science has proven one thing it's that giant knife + mail bag opening = enjoyment. I want to lobby for an even bigger knife, perhaps a Japanese sword ? Or even a low yield explosive .
quincy8557 I think I might have to agree with you...
Why only low yield?
EEVblog
I can spec and supply you with some custom shaped charges for a nominal fee. Licensing restrictions and international hazmat shipping fees may apply.
Or maybe a laser cutter?
CNC router?
34:59 you also still have a couple of microdrives laying around.. tear those down please!
***** Ah yes, I do have those still.
Microdrive teardown would be nice, never owned one. And yes.. Wrapped in plastic.. Twinpeaks :)
16:40 hey man, a little heads up from lonesome me; I like it when you show postcards. I've never sent one in, but I enjoy the little personal touches in between the seas of technicalities and advanced electronics
I agree. I kind of enjoy them also.
I agree as well! I really enjoy seeing them.
Totally agree - helps to know how far and wide Dave's fans are, and the more obscure the better, I'd say - just skip the postcards from common cities and landmarks (I've seen enough postcards of the Eiffel Tower, Big Ben and the ESB)
Bubble memory: There is one main loop and a number of minor loops off the main loop. Since it works like a shift register, the sub-loop approach allowed faster accessing.
Don't ever go to a simple box cutter, the big Crocodile Dundee knife is a trademark for the past few months, loved it when it was introduced, want to always see it. Just be careful with that crappy dusty packaging you sometimes get!
I would go with a tiny Crocodile Dundee knife :)
joshcryer I'd rather he had a little Swann-Morton surgical knife to supplement the big bush knife
Actually a carpet knife would be better because you can control the depth of the blade and have less of a chance of damaging the contents. The big Bowie knife does raise the cool factor though.
Gain Medium
Politicians can only get away with what the people allow them to get away with.
Yes Dave.. you should always read the note in a package first.
This way if someone would send you... let's say... a delicate solar cell you won't risk breaking it.;)
Oh, that epic fail will hunt him for ages now. :D
But it was definetily not the knifes fault. The cell was not packaged properly.
nickoe The cell was packaged well enough to arrive intact, which strongly argues it was packaged sufficiently well.
It's never the tool's fault, it's the tool user. It was the ripping with bare hands part after the knife couldn't do the job that killed the cell.
The problem with the big knife is simply that the point is a foot away from your hand, and controlling it accurately is far harder than with a smaller knife. That's an inherent problem that doesn't go away even if you're skilled enough to do the job successfully anyway. it's just the wrong tool for the job -- or at least for many of the jobs involved in opening packages.
One of the best mailbags in some time. Learned heaps!
Wow, that Power-Peg is sheer beauty!
OK, the Power Peg stuff blew me away. That is defiantly something I'd like to see used in future electronics.
elmchan has a very nice article on linescan cameras, with a proper fpga and processor.
Bubble Memory! Wow! simply WOW! I never heard of that before!
i have bubble memory in my TRS80 model 100 laptop from 1983. its a very interesting form of memory storage.
Eshan Wells
en.wikipedia.org/wiki/Bubble_memory
that tells you pretty much everything.
Rinoa Super-Genius haven't seen you around in a while
Same here! Take it apart!
It's got a bit of infamy in the arcade world; Konami used bubble memory in their "bubble machines". When started from cold, the machines always played a tune while the memory warmed up, since bubble memory has to be at about 30-40 c to work properly. The game roms themselves were stored in bubble memory cartridges. Sadly, very few of the machines still operate. Turns out, bubble memory did not make the best medium for long term storage of program rom.
Thanks Dave. Great mailbag!
Love it Dave keep up the good work I find myself checking daily for your latest videos I'm sure im not the only one 👍
Very interested to see the insides of that LCR meter :)
"Should I read the notes before opening?" YES!
I second that!
This was a great mailbag, keep them coming. Thanks
Vernier scale on the 4260A...nice.
yup you are correct sir CT is Connecticut here in the states
CT is Connecticut, FYI. Good guess.
Jameco has the stepper stacks. Saw them in the most recent catalog.
The 'hex chart' on the bubble memory is the defect map. - same as first gen hard drives, you had to tell the system to avoid these areas
Vacuum pump? But it inflates the "sleeve", so it's a normal pump, isn't it?
Some FANUC CNC controls used bubble memory, and there are quite a few still around.
Wow, I haven't heard bubble memory in years. When I was working on the F/A-18 they were still using core memory in the on-board computers, bubble memory would have been a step up!
I used one of those LCR bridges in university, back in the late 1980s. It looks very familiar. Butterworth. Chebyshev. ... [sigh]
My neighbor is from Eretria. Been in the states for just over 10 years.
Dave: 'You call that a knife? Eh that's me mail opener. Now this is a knife!' *Crocodile Dundee Theme plays softly in the background...*
Wonderful to see TEM's products and the bubble memory module. Was a teardown done on the bubble memory module?
Dave has a better knowledge of US state abbreviations than most people in the US do
Any chance bubble memory that old would still be functional? I would love to see someone integrate something like that in a modern project, just because.
The 4260 needs a definite fix.
It really does. And show how it is operated.
I remember using one at university. The entire mechanical aspect of it was very neat. Cranking on the dial and getting the meter to zero.
I hope it happens. Dave, you reading this?
I'm sure a box, completely covered in metal tape, didn't raise any eyebrows in customs :)
Not quite, as when they spotted it, just up next is the X-ray. They put it through, surely and by next minute they do know that´s only electronic stuff inside.
Bubble memory seems like it would be really slow.
Other than that, those pegs seem pretty interesting, though they should make a copper screw that can go in flush in order to allow for multiple pegs to be installed and then a single large heatsink placed on the other side (e.g., a multiple high power LED array).
I had a homemade speaker amp on a protoboard powering the speakers in my office, and everytime the air conditioner turned off, the speakers popped very alarmingly, and that aluminum tape covered box looks like the solution I made until I found a proper enclosure I could use xD
Where did you get the negative feedback shirt from. I love it. Puts my electronics degree to a perspective.
Those PowerPeg heatsink attachments are REALLY interesting. Such a interesting and original idea, I like it! The provided demos very good examples of how they can be used. I agree that the datasheets seem very well documented, something I personally wish was more common. I hope they become very successfull.
That powerpeg product is ultra nifty.
Just in case a live prehistoric monster stares at you from the box. Such knives are really handy.
cool, bubble memory,..i thought i read something about people trying to make a new type of bubble memory a while back, can't remember for sure though
The PowerPeg is amazing! I have to design them into my next product.
That bubble memory looks really interesting imo.
I like your cockatiel army
"Nothing worse than having your knob broken" lol :P
ha ha "needs some lube on that" :P
is that the same power outlet that pc's use today?
I'm probably the only one, but that scope on the shelf behind you is upside down and I always notice it every week. I just want to run in there and fix it.
Sloxx701 You aren't the only one. And it's their specifically for you :-P
Hi, I was wondering if you can do a a teardown on some Automotive PCMs to demystify their deep dark secrets and their inner workings! I love your channel and boy that's one big knife! You would make Crocodile Dundee jealous!
+1 vote for video on bubble memory.
Asmara is the capital of Eritreia, AKA the Horn of Africa, in Northeast Africa.
...and Dave says exactly the same 5 minutes later...
What solar cell incident? Please provide a link to that mailbag episode.
Question: I have several of those small 5V 9V 12V Power adapters and I have tested several and I have found some of them to have low output which means off to the landfill and most of them are either right on the money or just a little over like 13.87 for a 12V. My question is are the ones that are considerably over still viable or maybe not like 15.28V for a 9V or 17.79V for a 12V?
Gawds, bubble memory - I remember that being a 'thing' and plot element of a few 80's Knight Rider episodes! XD
Yes to reading notes beforehand :-) If you think it would be a spoiler, read it quietly to yourself
That bridge is of the technology that got us to the moon and back, no integrated circuits need apply... :-))
Sorry, I think you'd better check your history. en.wikipedia.org/wiki/Apollo_Guidance_Computer
Very cool mailbag items this time, Dave. But i demand more BiiiiiG "knifin´". Just because it is -- more or less -- your mailbag "trademark" ;)
If these PowerPegs had been there when i designed that heat sink for some SMD power mosfets back some 5 years ago, it had saved me some days!! In the end we used some M3 copper screws underneath the mosfets along with some complex wholes resulting that just the screw head was touching the backside of each mosfet.....
Could you do a teardown of a BLUETOOTH speaker? I ask because they are the hot items right now. From cheap to very expensive. They all seem to have audio over BT, Lipo batteries and internal charging, voice prompts, NFC for pairing. I just wonder if there is just a single really clever chip inside that manages all of this. Some even act as speaker phones. I'm guessing from cheap to expensive they are all basically the same circuits while the expensive ones may have better amps and speakers. Just curious.
I got a freebie from my mobile company. I was thinking they must have a 1/2 chip solution going on, and if they are going free there must be a surplus of cheep chips flooding in.
"there's nothing worse than having your knob broken off"
hehe, phrasing.
+Brady Rose i can fix a knob in 5 min like there s worst things"theres nothing worst than a knob breaking of"
yeah right HAHA!!!!!!!!!!!!!!!!!!!!!!!!!!
+Brady Rose nice comment Brady Rose
Best. Mailbag. Ever.
Whats on the breadboard dave?
These tiny radiators look too heavy relatively to their dissipating surface
How they got post out of Eritrea I have no idea. Brave man!
Postcards are cool, don't skimp on the postcards!
The Universal Bridge is as old as me :)
Did some heavy beer drinking in Winsted ,my wife was member of Winsted Elks club .
lindenhurst, ny! I work a couple towns from there, lol!
Great shirt Dave.
I first heard about bubble memory when reading about Konami using it in a version of an arcade board they made and ran some versions of games like Gradius and Twin Bee. The BIOS would have to wait some time to let it warm up for best operations but it's a shame that it wasn't so reliable, a lot of the old Konami Bubble systems no longer work due to the data being lost, but this is the issue with magnetic media
Ever notice that you never see crocodile Dundee and Dave at the same time? Hmmmm...
2:53 Yes, lube is always nice on a stiff knob.
"nothing worse than hawing your knob broken"
nice one Dave
bom ver portugal aqui :D
É uma questão de haver mais pessoal a enviar coisas. Não posso ser só eu! :)
Eritrea has one of the most authoritarian, if not the most authoritarian, governments in all of Africa.
Hi Dave, I have been a subscriber since you posted the "white and nerdy" video and have enjoyed all of your videos ever since. I am from Eritrea and my heart melted when you showed that post card from Asmara! I could never have imagined a post card from Eritrea show up on mail bag on EEVBLOG. Anyway cheers and selam!
SK from Asmara Eritrea.
"That's not a knife; *This* is a knife!"
Dave wins Knifey-Spooney - for ever.
Holy smokes, man... you could cut someone in half with that!
Its always bad if your knob is broken ;)
WHered you get the knife
Dave, you really should start mentioning when you open up packages in time instead of too late. :D This will make the videos way shorter :D
"Nothing worse than having your nob break off"
XD T-Shirt material!
Hey I have that same knife! Timber Rattler Western Outlaw right? awesome!
The big knife is just silly!
please do an x-rat on bubble memory.
2:50. LOL! Dave needs to lube his crusty knob to get it to work properly!
Hello from Singapore too =)
How can i get mailbag
11:23 Thanks for destroying the magic of TV for me, next you'll be telling me that Jimmy Savile was lying when he told me I was his special little guy :'(.
Ahh spell checkers. Unless they are referring to the likes of Seymour Skinner, the PowerPeg docs should read "Principle of Operation".
Glad it wasn't just me who spotted that, then, like a nasty road accident, couldn't keep my eyes off it despite not wanting to look :)
That's one beautiful bowie knife you've got there...
Eritrea is only a few decades old I think, it was formed in '91.
"Oh i think we need to set CRL to 1163...... OK Wake me up if you got it ..."
Isnt there a "speed gear selector? :D thats why development takes so long
As a little kid you've seen Gifts
Dave when i have the money i think i came across something u might like for your mailbag monday
Don't cut your back Dave :-)
Crocodile Dundee knife !
that knife is so stereotypically australian...
well I finally know how to pronounce Arduino. thanks
Sorry, but I always find something a bit 'icky' about used medical equipment. :-)
hi Dave, yes read notes, and please also read post cards, great blog, but no more than 2min teardowns or it probably deserves its own teardown
So annoying when you break your knob
You're really bumming me out by not tearing down anything! c'mon! :)
This intel print looks like HEX.
EEVblog Dave. what are you saying? "Second suck of the salve?" What does it mean, and where does it come from?
It is derived from the colloquialism, "fair suck of the sav" common in Aus/NZ - "to have a fair suck of the sauce bottle" (i.e. booze/drink; "Sav" is a contraction for "Sauvignon" - i.e. "Cab Sav" would be a "Cabernet Sauvignon" wine). To have "a second suck of the sav" is to take a second drink from the bottle (if one was drinking from the bottle and offered the friend a sip - said greedy friend would then be pushing their luck by taking a second sip/gulp from your bottle). Hope that helps you understand some of our Aussie slang :)
Thanks for that awesome comment! I tried to Google it, but couldn't find it.