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  • Опубліковано 3 січ 2025

КОМЕНТАРІ • 181

  • @electronalchemy7513
    @electronalchemy7513 10 років тому +7

    Some advice for Charlie, and his mum and dad. Amateur radio is a *great* way forward for younger people who don't have the option of school or college courses available to them. Not only are there many educational books, but you will almost certainly have a local amateur radio society near you, where they will be more than pleased to pass on help and advice, and I'm sure can help out with components. I got my ham radio "ticket" when I was 17, and should have gone for it earlier! Having a radio callsign on your work resumé (or C.V.) is often a better way "in" to a job interview than any number of exams and qualifications. People in electronics will see it and know that you have "walked the walk" for some considerable time, and it sets you apart from all those people with just theory. All the best mate!

    • @munnsie100
      @munnsie100 10 років тому +5

      Thanks so much for the advice! I'm planning to save up for next Christmas to get some HAM equipment, set it up, and get a callsign! Luckily a man up the road has a back garage full of equipment and has offered for me to visit him whenever I get around to getting my own setup :)

    • @riko4628
      @riko4628 10 років тому +1

      Charlie M Charlie, you should think about creating your own VBLOG :)

    • @munnsie100
      @munnsie100 10 років тому

      Great idea! I'll wait until all of my exams are over and get cracking! :)

  • @jebsaekam
    @jebsaekam 10 років тому +6

    Real mailbag starts at 18:45. I think the Flur product review should have been relegated to a separate segment.

  • @kevtris
    @kevtris 10 років тому +13

    I bought two of these core memory boards off of ebay, and I managed to get them to work and dump the existing data in them. I made a PIC based "core memory" exerciser to test every core. yes they all worked! It's 16K*18 bits (and is designed as a 16K*20 board but only 18 bits worth is stuffed). My board had defective tantalums and a TTL chip but I fixed these. All the chips on the core board are diode arrays, btw. I also drew a schematic out of that board.

    • @EEVblog
      @EEVblog  10 років тому +8

      kevtris You reverse engineered the *entire* board? Do you have the data?

    • @sbalogh53
      @sbalogh53 10 років тому

      Wow! You are a true hobbyist hero. Well done! :)

    • @kevtris
      @kevtris 10 років тому +1

      I do but I doubt I can post the URL for what I found. I also made a schematic of it and the 32K version but I might've lost 'em. blog kevtris dot org forward slash blogfiles fwdslash corememory stuff should be in there. core4 txt is the pinout and usage.

    • @kevtris
      @kevtris 10 років тому

      EEVblog
      yes I posted the link to it on dexxter's reply. if you can't get the files send me a personal msg and I will hook you up.

  • @buckmanentertainment33
    @buckmanentertainment33 10 років тому

    Hi Dave,
    I have been watching your videos for a long time and you remind me a lot of my own father, he was not into the design stuff but he used to fix TVs, radios, video recorders (including Umat) and goodness knows what else, he started in his late 20's back when everything was huge and back breaking to lift.
    He passed away back in 1998 and thanks to your videos it keeps him a live in my mind and reminds me of all the hours I spent just watching him and picking things up from him, sadly I never got into it much myself but one day I would love to meet you and thank you in person for everything you do for all of us.
    Regards,
    Stephen (Melbourne Vic)

  • @GadgetAddict
    @GadgetAddict 10 років тому +2

    Dave, how come you rarely use that fancy tegano scope of yours?

  • @electronicsNmore
    @electronicsNmore 10 років тому +1

    I have to look for a good deal on a FLIR. I have wanted one for a while now. :-)

  • @TheRealFOSFOR
    @TheRealFOSFOR 7 років тому +1

    I don't really see the big difference in a "real" thermal camera and this "visual thermometer". Both show a thermal view and both gives the temperature of the cursor area... I guess a thermal camera makes a more precise target.

  • @batterydudellc961
    @batterydudellc961 10 років тому

    Another great mail bag, I love when the old gear comes in!!

  • @abpccpba
    @abpccpba 10 років тому

    Thank You for the memory tear down. Do you plan on some HD photos of the board? I think all of us would love to see some.

  • @FrodeLøtvedt
    @FrodeLøtvedt 8 років тому +1

    You where beeing a little unfair with the FLIR TG165 in comparison with the ten times more expensive E8 when looking at electronics. I think the little TG165 was doing a nice job for that purpose.

  • @photopuppet
    @photopuppet 10 років тому

    Loving the new parcel opening tool for mailbags...

  • @pjshots
    @pjshots 10 років тому

    Loving the mailbag as always Dave, esp the ferrite core memory board!

  • @xjet
    @xjet 10 років тому +1

    No ads on today's vid Dave?

    • @EEVblog
      @EEVblog  10 років тому +7

      ***** The monetisation vanished from ALL my videos today! Just the usual random UA-cam glitch it seems, back now.

    • @myozone
      @myozone 10 років тому

      Yes, I look at the ads too ...

    • @redtails
      @redtails 10 років тому +1

      EEVblog Monetisation vanishes and reappears just like that? Strange. That's one way to give a lot of people a near heart-attack, especially if it's their livelihood

    • @Ritcheyyy
      @Ritcheyyy 10 років тому

      I have watched hundreds videos from Dave and they are very great, but since now the youtube didnt show one AD on them, thats great :) maybe its because Im from Slovakia and the ads are revelant to US or AUS, sometimes its good to be from a small country :)

  • @jastervoid
    @jastervoid 10 років тому +8

    18:55 OMG he put the knife right through Eeyore! Why Dave why!?

    • @EEVblog
      @EEVblog  10 років тому +9

      Christopher Johnson He was asking for it!

    • @munnsie100
      @munnsie100 10 років тому

      Poor old Eeyore meets Dave's STRAYA Knife :P

  • @BuysDB
    @BuysDB 10 років тому

    Wow. Amazing memory board, fantastic retro technology! Thanks so much for showing it!

  • @jtsiomb
    @jtsiomb 10 років тому

    It's neither 16k bits nor 16k bytes. The letter said it's 16k words of 18 bits each. 16 of which are used for actual data, plus 1 parity bit, and 1 "protection bit"(?).

  • @Phantomthecat
    @Phantomthecat 10 років тому

    LOVE the ferrite core memory! Would like to see that up close.

  • @redtails
    @redtails 10 років тому

    0:04 jeez you collected a lot of stuff again. Well I'll get my popcorn and enjoy this

  • @Ivo--
    @Ivo-- 10 років тому

    WOW that core memory is the most amazing I've ever seen!

  • @twocvbloke
    @twocvbloke 10 років тому

    Alexander M. Poniatoff (A-M-P plus EX for Excellence) must have been amazed going from making motors and generators to constructing memory boards for space shuttles, incredible to think that they used to do all kinds of computery things with that kind of technology, and even moreso that we're going back to that kind of memory storage with SSDs and the like... :D

  • @KangurosPL
    @KangurosPL 10 років тому

    Love the ferrite memory! Dave, has anybody ever sent you core rope memory?

  • @AcydDrop
    @AcydDrop 10 років тому +2

    First I love this series and thank you very much for your time doing them. But please more Mailbag in the Mailbag segment. I feel like I got a 15 minute sales pitch.

    • @tubical71
      @tubical71 10 років тому +1

      the same goes for me.

  • @Gamewwx
    @Gamewwx 10 років тому

    So how those rings can store information? 35:50

    • @TheBananaPlug
      @TheBananaPlug 10 років тому +1

      en.wikipedia.org/wiki/Magnetic-core_memory

    • @Gamewwx
      @Gamewwx 10 років тому

      Steve Pocock Cool. Thanks

  • @HamishMilne83
    @HamishMilne83 10 років тому

    27:03 That board is an absolute work of art. I'd hang that on my wall for sure

  • @OululainenIhiminen
    @OululainenIhiminen 10 років тому

    That core memory really brings the macro lens to its knees. :O

  • @PlasmaHH
    @PlasmaHH 9 років тому +1

    traditional fresnel? I own several IR thermometers and I have never seen one from the outside, but I have yet to take them apart... they all have some greenish or reddish tinted glass in front of the sensor. I would bet they are all real lenses. Maybe a sign of quality?

  • @paulhoward4161
    @paulhoward4161 10 років тому

    That dry sand is amazing. Keeps the kids (and adults) entertained for hours.
    Why ferrite core memory in 1993? Wouldn't there have been IC memory at that stage?

    • @EEVblog
      @EEVblog  10 років тому

      Paul Howard Yeah, love the dry sand, I want to know how it's made.

    • @gglovato
      @gglovato 10 років тому +1

      he bought it in 1993, that thing was in storage for decades

    • @harveyperch
      @harveyperch 10 років тому +1

      EEVblog
      mix sand and scotch guard and u get the same thing

    • @stephenwoods4118
      @stephenwoods4118 10 років тому +5

      Paul, core memory is non volatile. It's also not subject to alpha particle or cosmic ray errors.

  • @JohannSwart_JWS
    @JohannSwart_JWS 10 років тому

    That Dundee knife freaks me out every time you pick it up. Sooner or later... Bandaid time!

  • @ChongMcBong
    @ChongMcBong 10 років тому

    wow, that memory board was beautiful, definitely worth framing and hanging up somewhere :)

  • @NathanaelNewton
    @NathanaelNewton 10 років тому

    OMG that memory at the end was amazing D:

  • @fbonacic
    @fbonacic 10 років тому

    They managed to get industrial temp range by using standard IR temp. sensor, not lepton. Flir One has 0-100°C temp measurement.
    But what's the use of temp. color scale on the left of the screen when it's not numbered? The thermal image is not calibrated, so it's just for information :(

  • @MarkShannonroad_videos
    @MarkShannonroad_videos 10 років тому

    That core memory modular is very interesting! If I remember correctly the core itself was hand made due to it's complex nature. Enjoyed the video as always!

  • @Picolown
    @Picolown 10 років тому

    Christmas every Monday! Lucky you.
    Keep up the good work!

  • @redtails
    @redtails 10 років тому

    Great video, I love ferrite core memory more than I should. WHY DIDN'T YOU USE YOUR MICROSCOPE THOUGH. Ahem, sorry, that had to get out of me. Also, you might be aware of it already, but you can stack those macro adapter rings on top of each other to achieve much better macro capabilities (of course, you'll lose depth-of-field unless you decrease F-number)

  • @fuzzy1dk
    @fuzzy1dk 10 років тому

    I seem to remember a tablet (acer?) that also had a 5.35V charger, apparently the higher voltage was used to signal 2A dedicated charger current. Lots of complaints that it would only charge very slowly from anything but the original charger

  • @LovSven2011
    @LovSven2011 9 років тому +1

    Love the 16k ferrite memory module from 70s teardown. Watch from 25:50 . Beautiful piece of Technology.

  • @MadManMarkAu
    @MadManMarkAu 10 років тому

    Using the Crocodile Dundee knife on the Winnie the Pooh package... I clenched.

  • @vampifrog
    @vampifrog 10 років тому

    you should fill the bench all the way up with mail bags and boxes and talk from behind them. "hi! welcome to mailbag!"

  • @oriole8789
    @oriole8789 10 років тому +4

    Regarding core memory, it's neither bits nor bytes - it's 16k words from what he said. Each word being 18 bits, so 16k x 18 = 288,000 cores. 16Kbits would only be 16,000 cores of course. It's funny though since because of the density, it's unguessable as to how many there are just by looking haha. 16K? 100K? Sure, I'll believe it. ;) As far as I'm concerned it's just "a lot". ;) Fun segment all around Dave!

  • @Mandibela
    @Mandibela 10 років тому

    Hi Dave! Suggestion: Get a ruler in the macro shots as well, or maybe your pointer.. Something for size/enlargement reference!

    • @Mandibela
      @Mandibela 10 років тому +3

      Oh you did ;P

  • @crnkin2
    @crnkin2 8 років тому

    Dave, isn't the Fluke manual focus?

  • @TheSkogemann
    @TheSkogemann 10 років тому

    Regarding the FLIR charger - i just got my new Samsung S5 today and the USB-charger was also rated 5.35 Volts (2.0A).
    Curiously, i checked some of my older chargers for Samsung phones, some of the newer ones are also rated like that.

  • @adamlumpkins2000
    @adamlumpkins2000 10 років тому

    Dave is that fluke adjustable focus?

  • @ian-c.01
    @ian-c.01 10 років тому +1

    That memory board WHOAH !

  • @TrueBlueAustralian
    @TrueBlueAustralian 10 років тому

    But the big question can i modify it to fit into my DDR socket :P

  • @pocoapoco2
    @pocoapoco2 10 років тому

    I'd have to say that that ferrite core grid looks to be largely assembled by hand. Given the very low production it would have probably been too costly to develop tooling for fabrication.

  • @thomashvnmusic
    @thomashvnmusic 10 років тому

    Shots pefect, great stuff!!!

  • @leisergeist
    @leisergeist 10 років тому

    That memory unit is fascinating.. I almost want to think it's hand made, but there's no way someone sat there threading all those...

  • @SproutyPottedPlant
    @SproutyPottedPlant 10 років тому +1

    @USWaterRockets Reminds me of when Ben Heck kept mispronouncing the British ZX Spectrum or 'zed ecks Spectrum' as 'zee ecks Spectrum' lol!

    • @EEVblog
      @EEVblog  10 років тому +4

      Z is "zee" in the US, that's how they pronounce it. It's not wrong, just their way.
      Just like they shouldn't say we are wrong when we say "Zed 80" processor.

    • @robertcalkjr.8325
      @robertcalkjr.8325 10 років тому

      EEVblog
      Every time I ask a Brit why they hate the letter Z so much, they get angry at me. I wonder if they call a Zoo, a Soo?

    • @robertcalkjr.8325
      @robertcalkjr.8325 10 років тому

      *****
      A Brit is British. Dave is an Aussie. It's British people from England that always get angry about it.

    • @myozone
      @myozone 10 років тому

      Robert Calk Jr. Every time he says Hay-ch I correct him 'No it's H' We exported are criminals to oz in the past ...;-) !

    • @SproutyPottedPlant
      @SproutyPottedPlant 10 років тому

      Robert Calk Jr. depends which Internet troll you ask that day I guess!

  • @BulletMagnet83
    @BulletMagnet83 10 років тому

    This would probably be a question better posted on the forums, but while I'm here.... what's the bare minimum spec TIC that's any good for "shorted/hot component on PCB no smaller than SOT23" use? Burnt myself like a stupid bastard today doing some fault finding and I'm thinking of making puppy dog eyes at my company to get one for my department.

  • @AliMirjamali
    @AliMirjamali 10 років тому

    At 20:30 - I am not a physician, yet after working for 7 years at a pharmaceutical company which was/is a leader in medicine for transplant patients, I could say that *liver transplant* has a relative high survival rate and significantly better in children, especially if organ is donated from a living parent (Even small part of a healthy liver can regenerate). Still, patient should receive some immunosuppressant medicine. The advances in immunosuppressant medicine has been significant.
    There are many patients on waiting lists in need of an organ in countries with "opt-in" legalization. Those Individuals who wish to donate their organs after death should read about legalization in their countries and fill the opt-in consent form at an Organ Donation Register.

    • @munnsie100
      @munnsie100 10 років тому

      Hi Ali! Interesting read! I have been on anti-rejection drugs (Tacrolimus) since 2008 :)

  • @vehiculeselectriques
    @vehiculeselectriques 10 років тому

    Hi Dave,
    4,35V is the max voltage needed to charge some of the new high energy density Lithium cells as the Samsung SDI ICR18650-32A or LG ICR18650D1
    keep the good job
    Phil

  • @CodeMasterRapture
    @CodeMasterRapture 10 років тому +1

    For kids and EE stuff, I have both of my kids involved in local hacker-spaces and coding academies. Been fantastic for them both socially and educationally. I would recommend it to any parents looking to get their kids interested.

  • @SuperWayneyb
    @SuperWayneyb 8 років тому

    Hi, what do you think of Dewalts thermal imager? 👍🇬🇧

  • @st00ch
    @st00ch 10 років тому

    Those ferrite cores were insane.

  • @jusb1066
    @jusb1066 10 років тому +1

    a bit of 'Dambusters' technology with the lasers!

  • @winstonsmith478
    @winstonsmith478 10 років тому

    What a precise, labor intensive nightmare that core memory would have been to manufacture. Wow!

  • @whuffo
    @whuffo 10 років тому

    That core memory was assembled by human hands under high magnification lenses. Imagine fine needles being threaded through the cores by steady hands.

  • @Jeff-xt8xf
    @Jeff-xt8xf 10 років тому +1

    "Welcome to the mailbag, lets go from oldest to newest, apart from the commercial item I've been sent which I'll spend half the video on and then say I don't have the time to open all the rest". If you want to do commercial advertisements on your channel then fine, but keep them separate so we can skip them, or a short advert at the beginning and/or end. Before when you've been posted commercial stuff it's been a quick few minutes look then a separate video. Makes me thing Flir are paying you for the advert.

    • @EEVblog
      @EEVblog  10 років тому +1

      Jeff You can think that all you want, I was excited to take a look at the camera, so I opened it first. Too bad if you didn't like that.

  • @douro20
    @douro20 10 років тому

    Looking at the construction it was probably assembled with a machine, as machines for assembling core memory were developed in the late 1960s.
    I'd like to see some plated wire memory. It is a similar technology which was developed by Bell Labs back in the 1960s, and it allows both for cheaper construction and potentially higher densities since it can be made using the same photolithographic processes used in PCB manufacture. It was actually used, in a non-destructive-readout version, in the Honeywell HDC-701 missile guidance computer used in Minuteman III ballistic missiles.

  • @robertcalkjr.8325
    @robertcalkjr.8325 10 років тому +1

    Thanks Dave. That early Nasa board has "frame me" written all over it.

  • @tubical71
    @tubical71 10 років тому +1

    Hi Dave, sorry to say this, but why did you feature that flir thing well over half of the overall video length? This is the first time i used the bottom slider to go past that flir "segment" as it was simply boring....!!
    Mailbag should be mailbag and not some form of hidden advertising. So this time no thumbs from me, as the flir is a truly thumbs down....but every other beeing great!!
    It would be much better if you had split this into two videos one beeing mailbag and the other the flir thermo what ever, so i have a choice of what i gonna watch, as i would have skipped that flir video!
    All the rest had been a pleasure to watch, especially the Charile segment and the core memory....Thanx for that!!

  • @luisdanielmesa
    @luisdanielmesa 10 років тому

    I wonder how the laser points rotate?

  • @BahneAuras
    @BahneAuras 10 років тому

    Hi! Found a video about the production and testing of equipment for the Apollo mission. In one part you can see the manufacturing process of a ferrite core memory module!
    Enjoy!
    Computer for Apollo

  • @preben01
    @preben01 10 років тому

    Audio was a bit bad today, when you filmed the close-ups. But awesome show as always!!!

  • @TheM1n3rX
    @TheM1n3rX 10 років тому

    I got exactly the same usb charger from a cheap chinese tablet that you got from the FLIR. The sticker also looks exactly the same! It only says "Switching power supply" instead of FLIR. The white sticker on the side has a serial number: KP0100P00130301002PKA5

  • @FrankenPC
    @FrankenPC 10 років тому

    Hey! I've got the bottom half of that Ampex core memory board! I hope you try to hack it.

  • @sylvanenergy
    @sylvanenergy 10 років тому

    Intigrate a flir to create a heliostat?

  • @Aeduo
    @Aeduo 10 років тому +2

    they should've done the lasers in a triangle shape. :D

  • @44R0Ndin
    @44R0Ndin 10 років тому

    So, I've got 16 Gigabytes of memory in the new computer that I'm building.
    But seeing that core memory STILL makes me jealous.
    Wonder if you could get that stuff to interface with a modern computer?

    • @reggiebacci
      @reggiebacci 10 років тому +8

      Everyone phone ASUS until they agree to put the socket on all future motherboards.

    • @TheChipmunk2008
      @TheChipmunk2008 10 років тому

      reggiebacci it'd be non volatile too. But with the wire run lengths needed, the performance would be godawful by modern standards

  • @GregoMorgan
    @GregoMorgan 10 років тому

    That's 64x64x32=131,072 ferrite cores, which amounts to 16KBytes.

  • @0xffox
    @0xffox 10 років тому

    Bloody hell, Dave! You just ripped that Eeyore with your sword!

  • @subbookkeeper
    @subbookkeeper 10 років тому

    I'd have to work for more than 2 years to buy such Flir thermal camera.

  • @narcovice
    @narcovice 9 років тому

    have to take the wrapper off the yellow one as well as all flit products. i can't watch mines on my computer theres nothing on it all can see are the cord image

  • @anacierdem
    @anacierdem 10 років тому +1

    Missed your swiss knife...

  • @thecooldude9999
    @thecooldude9999 10 років тому +1

    Man charlie got lucky getting a scope like that for free! I'm 14 and still trying to fix my tektronix 464 after a year of owning it.
    any advice on fixing these older scopes?

  • @robpayne1956
    @robpayne1956 10 років тому

    love the pocket knife Dave :-)

  • @gogleg4
    @gogleg4 10 років тому

    New voice! Thanks Dave!

  • @TheKogoroMouri
    @TheKogoroMouri 10 років тому +1

    Yes sure, the E8 is better image quality but it cost much. for the price, the TG165 is very great and have a good (80x60) résolution if compare to similar fluke products :)

  • @jaylang11
    @jaylang11 10 років тому

    wowww thats pretty, gives you an idea why computers were so damn expensive back then

  • @AndrewFremantle
    @AndrewFremantle 10 років тому

    Regarding the voltage output on the power supply, they're not the first to do that. The wonderful USB power supplies for my not-so-wonderful HP Touchpad tablets output 2A at 5.3V.

  • @WooShell
    @WooShell 9 років тому

    This must be the first video where something labelled Fluke is _not_ being praised as the best since the invention of sliced bread..

  • @SakariNy
    @SakariNy 10 років тому

    I've seen some logitech device that came with really long (2+m) usb cable. Power supply had 5.15V output.

    • @EEVblog
      @EEVblog  10 років тому

      SakariNy I've seen that. But this is the first time I've seen 5.3V

  • @kektus8150
    @kektus8150 10 років тому

    why dont u do tutorials anymoreeeee?? :(

  • @ip223
    @ip223 10 років тому +3

    Mailbag video and half of it is on comparing ir cameras...

  • @JohnKha
    @JohnKha 10 років тому

    Where was the Tagarno microscope today?

  • @dinkc64
    @dinkc64 10 років тому

    Love the AMPEX!!

  • @JohnKha
    @JohnKha 10 років тому

    I have a VT04, its not as nice as the FLIRs, but it is better than the VT02. It does what I need it to do, and I couldn't justify the higher prices for the FLIR models at the time. It does do the visual blending, still, and the firmware update gives it some better battery life.

  • @SproutyPottedPlant
    @SproutyPottedPlant 10 років тому

    Why don't we have really, really small magnetic core memory now? Flash memory is the ultimate in OCD technology especially if it is built in it could die at any time or write too many times! It probably won't but that's OCD.

  • @googleiscensorship34
    @googleiscensorship34 10 років тому

    We hope that you carefully separate your garbage and properly recycle all electronic components.

  • @BplusJequalsFire
    @BplusJequalsFire 10 років тому

    anyone know what MSX refers to

  • @FrankSandqvist
    @FrankSandqvist 10 років тому

    Did anyone else get really weird optical illusions when looking at the core memory?

  • @Knight8365
    @Knight8365 10 років тому

    Your postman must get a real workout delivering all those parcels.

  • @bambam144
    @bambam144 10 років тому

    nice mailbag
    thumbs up
    ****
    if u are interesting in a review of the flir tg165 vs the fluke vt04, then u should watch martin's great video:
    QTV #9 - FLIR TG165 vs Fluke VT04 Visual IR Thermometer / Imager

  • @krattah
    @krattah 10 років тому +1

    Where is episode #666?

  • @Ivo--
    @Ivo-- 10 років тому

    IMHO it would have been better to have made a separate video on the FLIR so you could dedicate more time to the rest of the mailbag. You have this giant pile of mail and over half the video is dedicated to the FLIR.

  • @RaabinatorCr
    @RaabinatorCr 10 років тому

    Mick Dundee is missing his knife ;-)

  • @richfiles1
    @richfiles1 10 років тому

    Love core memory! It's so aesthetically pleasing!
    I have a Wang 360SE Electronics Package (sadly, no keyboard/nixie display unit... only the processing unit). It was a calculator from the mid to late 1960s era that used core memory. Sadly, it's the only core memory in my possession.
    My calculator's core memory doesn't hold a candle to THAT beaut! I am in LOVE with that core memory! Sexy!

  • @MrTallefjant007
    @MrTallefjant007 10 років тому

    The knives is a bit overkill.

  • @zeuss194
    @zeuss194 10 років тому

    Damn that memory board how the F*** did they build that, it's definitly too small for human hands ...