Author Topic: Harddrives - nice pictures  (Read 7130 times)

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Online NoopyTopic starter

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Re: Harddrives - nice pictures
« Reply #25 on: January 05, 2020, 02:01:00 pm »
Nice dust spots in the upper left :P

I have to clean my dslr sensor...  ::)
But I´m not sure whether you can get rid of every dust spot with this kind of setup.


what do use for taking pics like these?  :o

Long story short:
Take a reflex camera (I have a Canon EOS 60D),
mount a lens reversed on the camera (to achieve this take a "retro adapter" // the shorter den lens the better, I have a 10-22mm),
mount distance rings between the camera and the reversed lens as long as the picture gets not too bad.

And there you have your microscope:



Magnification factor 30:1 but with 18 Megapixel! That is 120:1 for 1,2 Megapixel.
I can resolve 10µm without problems. Mostly 5µm is also no Problem. Beyond 5µm sometimes you can see somethin sometimes you have to guess and sometimes you loose...  ;D

https://www.eevblog.com/forum/projects/decapping-and-chip-documentation-howto/msg2666622/
 
The following users thanked this post: SeanB, legacy, Wimberleytech

Online rsjsouza

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Re: Harddrives - nice pictures
« Reply #26 on: January 05, 2020, 02:17:04 pm »
Beautiful pictures. Thanks for sharing!
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 

Online NoopyTopic starter

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Re: Harddrives - nice pictures
« Reply #27 on: January 05, 2020, 02:34:44 pm »
Thank you and everybody else for the positive feedback.
That is one reason to take more pictures!

 :popcorn:

Offline RoGeorge

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Re: Harddrives - nice pictures
« Reply #28 on: January 05, 2020, 02:47:58 pm »
Beautiful pics, thanks.   :-+

Did you tried focus stacking (to increase depth of field)?

Online NoopyTopic starter

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Re: Harddrives - nice pictures
« Reply #29 on: January 05, 2020, 02:54:35 pm »
 :-+

I should do some focus stacking, absolutely right.
Till now I´m not very familiar with image postprocessing. Only quick&easy HDR-conversion and a a little tonal correction.
Do you have a good suggestion for a image-stacking-program?

Offline Wimberleytech

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Re: Harddrives - nice pictures
« Reply #30 on: January 05, 2020, 03:40:15 pm »
Thanks!

A quantum drive would be interesting too! Till now I had none but Ebay will help...  :D


The decapping was done with a torch. With a little practise that gives 70-80% good dies depending on the type of chip.
The pics were taken with a "normal" dslr with a reversed 10mm objective and "balgen"-rings.

I have posted the how-to:

https://www.eevblog.com/forum/projects/decapping-and-chip-documentation-howto/msg2666622/
 :popcorn:

I was the design manager (and designer) for the read-channel chip on this drive:  https://www.ebay.com/itm/Used-Quantum-540AT-Hard-Drive-5N01E-EA-20-10718002-2-5-Series-EU54A011/153394671575?epid=110714972&hash=item23b708efd7:g:uAEAAOSwddpcdEzr

I translated your decapping page.  Great work.  Much safer than fuming HF et al.
 

Online NoopyTopic starter

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Re: Harddrives - nice pictures
« Reply #31 on: January 05, 2020, 04:28:46 pm »
I was the design manager (and designer) for the read-channel chip on this drive:  https://www.ebay.com/itm/Used-Quantum-540AT-Hard-Drive-5N01E-EA-20-10718002-2-5-Series-EU54A011/153394671575?epid=110714972&hash=item23b708efd7:g:uAEAAOSwddpcdEzr

I translated your decapping page.  Great work.  Much safer than fuming HF et al.

Very cool! So you know a lot more about these chips than I do!  ^-^

I have to look für a Quantum 2.5 series, right?
At the moment there is no really cheap one but I will keep my eyes open.
Perhaps anybody in the forum here has one?

I´m sorry you have to translate my page but english costs me always a lot of time and time is a rare thing.
Thank god Google Translator does a very good Job.
I´m also very pleased with my decapping solution. Easy, cheap, not very harmful an with a good success rate.
Soon I´ll test a kind of ofen to adjust a exact Temperature and get the sucess rate to ~100%.  :-/O

Offline RoGeorge

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Re: Harddrives - nice pictures
« Reply #32 on: January 05, 2020, 04:48:14 pm »
Do you have a good suggestion for a image-stacking-program?

It's on my 'to do' projects list, but I don't have any hands on experience with focus stacking, sorry.

Offtopic
I found out about focus stacking some years ago, while accidentally discovered a technique to make live insects stay in a desired position without moving (for macro photos).  I put some grapes in the fridge, together with a wasp I didn't know it's there.  When I took the grapes out, found the wasp and noticed it was not dead, but could only barely move.  I put it outside, in the sun, and took some macro pics of it while the pure wasp was recovering.  To my surprise, the photos were very lame when compared with other online photos of insects, even when the lens was pushed to its maximum DoF (Depth of Field) settings.  That's how I found out about focus stacking and how much it can do for DoF.

Later, I also found out that most of the insects stop moving at low temperatures, yet they are not harmed at all, this happens frequently in nature during the cold nights.  Just don't freeze them.  Also, they can be arranged upon wish in a photo setup without hurting them.  Even when put them into the direct sunlight for better shots, there is still time to take enough photos before the insects can fly away.   :)

Offline Wimberleytech

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Re: Harddrives - nice pictures
« Reply #33 on: January 05, 2020, 05:04:17 pm »


I have to look für a Quantum 2.5 series, right?

Yes.  Part number would start with EU and the drive would be labeled "Europa"
 

Online NoopyTopic starter

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Re: Harddrives - nice pictures
« Reply #34 on: January 05, 2020, 06:25:12 pm »
Offtopic
...

I know what focus stacking can do but never tried it. Well, still something to do and learn...  :-+

I have to look für a Quantum 2.5 series, right?
Yes.  Part number would start with EU and the drive would be labeled "Europa"

I´ll keep my eyes open and will post it here when I got one!  :-+

Offline TheEPROM9

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Re: Harddrives - nice pictures
« Reply #35 on: January 07, 2020, 11:34:50 pm »
Nice dust spots in the upper left :P

I have to clean my dslr sensor...  ::)
But I´m not sure whether you can get rid of every dust spot with this kind of setup.


what do use for taking pics like these?  :o

Long story short:
Take a reflex camera (I have a Canon EOS 60D),
mount a lens reversed on the camera (to achieve this take a "retro adapter" // the shorter den lens the better, I have a 10-22mm),
mount distance rings between the camera and the reversed lens as long as the picture gets not too bad.

And there you have your microscope:



Magnification factor 30:1 but with 18 Megapixel! That is 120:1 for 1,2 Megapixel.
I can resolve 10µm without problems. Mostly 5µm is also no Problem. Beyond 5µm sometimes you can see somethin sometimes you have to guess and sometimes you loose...  ;D

https://www.eevblog.com/forum/projects/decapping-and-chip-documentation-howto/msg2666622/

I love that solution, I bet if you just fart it looks like an eathquake to the camera. I should try something simular with my Fuji. If I us my Macro 80mm f2.8 lens that should wok quite well.

I know I'm a Fuji man, but cannon make some beutiful lenses. So do Nikon, but it don't look like they are going to be around much longer.
« Last Edit: January 07, 2020, 11:38:20 pm by TheEPROM9 »
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Offline TheEPROM9

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Re: Harddrives - nice pictures
« Reply #36 on: January 07, 2020, 11:36:16 pm »
TESLA EPROM by TheEPROM9, on Flickr

I know its not a HDD, but its kind of relevent when you are taking shots of dies. Plus its a vintage EPROM, who does not love vintage EPROM's
TheEPROM9 (The Husky Hunter Collectors inc.)
Knowledge should be sheared freely to those who want it.
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Online NoopyTopic starter

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Re: Harddrives - nice pictures
« Reply #37 on: January 08, 2020, 04:27:09 am »
I love that solution, I bet if you just fart it looks like an eathquake to the camera. I should try something simular with my Fuji. If I us my Macro 80mm f2.8 lens that should wok quite well.

I know I'm a Fuji man, but cannon make some beutiful lenses. So do Nikon, but it don't look like they are going to be around much longer.

Thanks!  :-+

You see your neighbour farting!  ;D
I have positive experiences with a massive table and an esd-pad. The table is hard to move and the esd-pad does some damping. Of course only remote release the camera and mirror lockup is also very usefull.

Every company has it´s pro and cons. I just started with Canon...  :)
But a good lens does not always perform good with the inversed setup! I was very disappointed looking at the pictures of my Canon EF 24-70mm f/2,8L which normaly takes lovely pictures!  :wtf:


...on Flickr

I know its not a HDD, but its kind of relevent when you are taking shots of dies. Plus its a vintage EPROM, who does not love vintage EPROM's

I also like other silicon pics!  :-+ 8) As you can see here: https://richis-lab.de/
I will browse your pictures calmly, first I have go to work... :-/O

Offline magic

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Re: Harddrives - nice pictures
« Reply #38 on: January 08, 2020, 08:42:06 am »
I suppose you need to use a lens designed for minimum object distance equal to the length of your reverse mounting rings. Such rule seems to kinda make sense if you think about what's happening here in terms of objects, images and ray traces through the lens ;)

Correct me if I'm wrong, but AFAIK focusing distance is not a typical strength of fast lenses.
 

Online NoopyTopic starter

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Re: Harddrives - nice pictures
« Reply #39 on: January 08, 2020, 09:53:28 pm »
I´m no expert regarding optics but the rings between camera and lens are irrelevant regarding the basic image quality.

More rings make the image darker and at some point the quality gets worse (with the complete setup I have theoretical 300nm/px  :scared:) but a bad lens is a bad lens with zero and with six rings.

No idea what´s the key fact. EF-S 10-22mm is good, EF-S 18-135mm kit-lens is good, EF 24-70mm f/2,8L is bad.  :-// :-// :-//

Offline magic

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Re: Harddrives - nice pictures
« Reply #40 on: January 08, 2020, 11:23:45 pm »
I'm no expert too ;) but I think the problem is simply with focus distance and optical corrections in the lens being optimized for normal operation, when focus distance on the front side (object distance) is much longer than on the back side (sensor distance).

If you reverse the lens and bring the sensor close to the front to reduce magnification and increase brightness, you violate the minimum (front-side) focus distance specification of the lens, which is probably at least half meter or so. Some lenses may work that way, others may not work very well.
 

Online NoopyTopic starter

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Re: Harddrives - nice pictures
« Reply #41 on: January 09, 2020, 04:24:19 am »
Ah, no I see your point!
Sound´s reasonable.  :-+


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