solyaris
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A case including the SD card INSIDE ?

Wed May 14, 2014 6:32 am

Hi all

I have a problem with all the (standard/low-price/plastic) cases I saw until know:

The SD Card (not micro) is removable and partially stay outside the case.
That's bad for me. I explain my application/hardware requirements:

I'm developing an e-commerce solution to delivery e-orders to producers/sellers;
where orders will be printed on paper by a raspberry :-)

So, I have to supply a raspberry to final users/customers and they are:
workers (in factory-like environments), cook's assistant (in kitchen environments), etc.
anyway I would like that USERS could NOT ACCESS the card for many (obvious) reasons.

1. MAIN REQUIREMENT: SD CARD INSIDE THE CASE
the main requirement is that SD CARD must be not accessible by users
and possibly it stay completely hidden inside the case.

Ok, A possible workaround could be to use a microSD card with an adapter
I just used standard size SD cards until now and I suspect to have these problems with MICRO SD cards:

- more expensive solution (probably microSD card + adapter cost MORE than a standard size SD card with same "class")
- The adpater I saw, let access microSD, sticking out some millimeters, instead, I would like that any SD card
(standard size or micro) could NOT BE ACCESSIBLE/touched by users.

2. SECONDARY REQUIREMENTS: SHOCK ABSORBING CASE / WATER RESISTANT
Just because the raspberry will be positioned in a "difficult" working environments...
an interesting feature could be a case that let survive raspberry from possible blows/falls

Especially for kitchen envs could be attractive a case that minimize damages coming from liquid splashes, etc.
In that sense, the best could be a case that expose only three plugs: power + usbs + ethernet

Last but not least, I have to keep case costs LOW
(I saw somewhere interesting projects of alluminium/waterproof custom-made cases... too expensive for my possible distribution of device to small retailers...)

Any idea ?

At first it could be great to just find an already made plastic / low-cost case that simply take Sd card inside.
but I'm interesting to keep in touch with possible producers of custom-made cases! In this last scenario please contact me at rospo.platform@gmail.com or better for your marketing: please let know your contact/links here

Sorry for long post
Thank you
giorgio
Last edited by solyaris on Wed May 14, 2014 12:27 pm, edited 1 time in total.

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Hove
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Re: A case including the SD card INSIDE ?

Wed May 14, 2014 7:30 am

The micro-SD cards + adapters are probably the best solution as it opens up the option of using standard cases - some of which will meet your security requirements. The official Raspberry Pi high performance SD card is in fact a micro + adapter.

https://www.modmypi.com/sd-cards-and-ad ... -8gb-micro
https://www.modmypi.com/sd-cards-and-ad ... daptor-mmp

They do not stick out beyond the Raspberry Pi PCB - I have 2 of these in use right now sealed inside a closed case.
www.pistuffing.co.uk - Raspberry Pi and other stuffing!

ame
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Re: A case including the SD card INSIDE ?

Wed May 14, 2014 10:29 am

Micro SD cards with an adapter are no problem in a Pi, and they don't seem to be more expensive these days.

To protect the card, consider a Cyntech case with an SD card cover.
http://shop.cyntech.co.uk/collections/e ... berryblack
http://shop.cyntech.co.uk/collections/a ... card-cover

Whatever you decide, don't forget that the whole box is vulnerable, not just the SD card.

solyaris
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Re: A case including the SD card INSIDE ?

Wed May 14, 2014 12:37 pm

thanks guys

mmhh...
in fact I stll a bit perplex about the solution of microsd + adapter : not so cheap also considering the fact, if I'm not wrong,
microSDs are more expensive than standard sized SD (with the same "class")...

BTW, another requirement that I hve to consider is to mantain a "sufficient" SD read/write speed (off-topic here, I'll post later about that :-) )

The Cyntech case with the SD cover seem a good compromise: low cost and sufficient "protection" of what outside the case. Interesting!

Just now I discovered this case, at first glance I love it:
http://shop.cyntech.co.uk/collections/e ... ortcrust01
http://www.bartbania.com/index.php/shor ... pberry-pi/

that seem to satisfy my needs!
Any further idea ?

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Hove
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Re: A case including the SD card INSIDE ?

Wed May 14, 2014 12:56 pm

The 8GB Raspberry Pi micro SD cards are only £6 - how much cheaper do you want it to be? The card is also optimized for random read / write operations; most SD cards are optimized for large writes for things like cameras. This means that although the official card is only a class 4, it is faster and less likely to fail than a larger card in the Raspberry Pi.
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solyaris
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Re: A case including the SD card INSIDE ?

Wed May 14, 2014 1:07 pm

Hove wrote:The 8GB Raspberry Pi micro SD cards are only £6 - how much cheaper do you want it to be? The card is also optimized for random read / write operations; most SD cards are optimized for large writes for things like cameras. This means that although the official card is only a class 4, it is faster and less likely to fail than a larger card in the Raspberry Pi.
I'm using now a Sandisk 8GB class 10 (that clam to supply 30MB/s)
Using Raspbian form my preliminary tests, It seem all really fast.
In fact probably It will be a sufficent a 4GB card not necessarly so fast.

I have to mantain costs low but all in all costs are not the most requirement.

In your opinion, comparing
- a microsd+adapter
OR
- a standard size SD,

equal calss, equal capacity (let say 4GB)

Both solution are EQUIVALENT in terms of mechanical robustness / affordability ?

I'm asking becuase my suspect is that the microSD + adapter could be subject to possible mechanical shocks (blows...)

giorgio

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Hove
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Re: A case including the SD card INSIDE ?

Wed May 14, 2014 2:25 pm

A micro SD plus the special adapter I mentioned above https://www.modmypi.com/sd-cards-and-ad ... daptor-mmp are probably the safest because the SD card adapter doesn't stick over the edge of the PCB so stands a much lower chance of getting knocked. Also, better to go for the Raspberry Pi 'official' SD card https://www.modmypi.com/sd-cards-and-ad ... -8gb-micro as it's built for computer style read / write cycles rather than camera style large write cycles. That makes it quicker and more resilient to be used as the main 'disk' for a computer.
www.pistuffing.co.uk - Raspberry Pi and other stuffing!

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GTR2Fan
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Re: A case including the SD card INSIDE ?

Wed May 14, 2014 2:31 pm

+1.

It also eliminates the potential problem of 'card bend' that sometimes affects conventional microSD-to-SD adaptors.
Pi2B Mini-PC/Media Centre: ARM=1GHz (+3), Core=500MHz, v3d=500MHz, h264=333MHz, RAM=DDR2-1200 (+6/+4/+4+schmoo). Sandisk Ultra HC-I 32GB microSD card on '50=100' OCed slot (42MB/s read) running Raspbian/KODI16, Seagate 3.5" 1.5TB HDD mass storage.

evilkitty
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Re: A case including the SD card INSIDE ?

Mon May 19, 2014 7:34 pm

a 1/2 size sd card adapter may be a good idea for you
you could just mod some box into a case that will fit everything inside of it *points at my pi (see signature)*
you could then just use shot extension cables to run feeds out of the box
you would probably want one of these for the Ethernet cable
http://www.monoprice.com/Product?c_id=1 ... 1&format=2
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liquidsnake
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Re: A case including the SD card INSIDE ?

Wed May 21, 2014 12:39 pm

I think the post above mentioned it, but this is the one I bought and it seemed to maintain the read/write speed of the micro sd. It fits flush into the SD card slot on the Pi.

http://www.ebay.com/sch/i.html?_trksid= ... &_from=R40

Ja$on
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Re: A case including the SD card INSIDE ?

Wed May 21, 2014 2:15 pm

once i saw this micro SD card adapter that was the right width but really short so it would keep lower profile.

Ja$on
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Re: A case including the SD card INSIDE ?

Wed May 21, 2014 2:21 pm

here is the link for what looks like what i saw that one time.

http://www.adafruit.com/blog/2012/08/20 ... pberry-pi/

solyaris
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Re: A case including the SD card INSIDE ?

Thu May 22, 2014 6:40 am

Three distinct topics emerge:

1. Standard sized SD versus micro SD:
if I well understood by previous post here, micro SD cards are in general better (more affordable) than standard size SD because micro SD are specialized in write/read cycles os "small" data chunks; It's that superiority of microSD over standard SD is always true? There is any benchmark / analysis about that (maybe specific on Raspberry usage) ?

2. SD Card Capacity/Class recommendations:
Is not completely clear to me what the reccomended SIZE and CLASS for a best data disk read/write in terms of REALIABILITY or better saying reliability/speed trade-off ? BTW, Application side I have no big data storage need requirements, I'd go for a 4 GB card, but what about CLASS ?

3. Fitting a SD card INSIDE a box (that's my original question):
Again, my main requisite is that SD card must be NOT accessible by users.
At the moment I consider Shortcrust case a good compromise:
http://cdn.shopify.com/s/files/1/0181/3 ... 1396977299
the case above is expensive... but it seem to garantee that SD card (standard size) is both removable and hidden / protected (shockproof) by user's hits.

The micro SD adapters could be a solution that allow to use one of many already available low-cost raspberry cases, but I do not understand, if the micro-sd + adapter is an affordable solution (in terms of shockproof)... the 'card bend' ?

Any further suggestion?

thanks
Last edited by solyaris on Thu May 22, 2014 7:05 am, edited 2 times in total.

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Mortimer
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Re: A case including the SD card INSIDE ?

Thu May 22, 2014 6:57 am

Cyntech case ?
Image

plus...

Cyntech card cover?
Image

Equals...

Image
--------------
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solyaris
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Re: A case including the SD card INSIDE ?

Thu May 22, 2014 7:02 am

[quote="Mortimer"]Cyntech case ?
Image

Yes, that could be a good compromise I'm evaluating.
The SD Card "protection" have a pro that avoid SD extraction and seem almost "waterproof"
The cons is that the SD case still stick out from the case, and so this solution do not prevent accidental hits by users that could damage the card... anyway yes, probably a good compromise also in terms of costs (box+ sd protection)...

SteveSpencer
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Re: A case including the SD card INSIDE ?

Thu May 22, 2014 7:55 am

The cons is that the SD case still stick out from the case, and so this solution do not prevent accidental hits by users that could damage the card... anyway yes, probably a good compromise also in terms of costs (box+ sd protection)...
I have some of these. There is enough space around the SD card that means hitting the cover won't impact the card unless you hit it so hard that you risk breaking the case and/or Pi anyway.

I use a couple of these where I have put the Pi onto a shelf on a TV stand. It stops my 14 yr old from messing with the card perfectly :)
Steve S
No, I can't think of anything funny that won't offend someone if they want it to...

solyaris
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Re: A case including the SD card INSIDE ?

Thu May 22, 2014 8:28 am

SteveSpencer wrote:
It stops my 14 yr old from messing with the card perfectly :)
exactly! :-)

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