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PICList Thread
'[OT]:Casing for electronics items.'
2000\06\15@163413 by Andrew Seddon

picon face
Hi all,
  I am designing a item that would benefit from a custom molded case.
However I don`t really know how to go about doing this.. Any suggestions??
While I`m on the subject does anybody know of a plastic/glass like material
that can be turned opaque/clear via voltage/current.. I have searched the
internet extensivly and can find nothing.. I know it exists as I saw it on
Tommorows World once.

Thanks for any help.

2000\06\15@165641 by Spehro Pefhany

picon face
At 09:28 PM 6/15/00 +0100, you wrote:
>Hi all,
>   I am designing a item that would benefit from a custom molded case.
>However I don`t really know how to go about doing this.. Any suggestions??

Just have dimensioned drawings made up, have a mold made up and
checked out, and have it run.

Depending on the size, shape, slides required, materials, finish,
desired mold life, number of cavities (per part) and number of parts,
the molds might cost in the low 10 (of) K $ or ten times that for a
large high quality mold (like for a monitor). It takes at least a few weeks
to get an injection mold made. I've done this more than a dozen times,
(using offshore moldmakers at times). Hint: ALWAYS retain control
and/or possession of the physical mold.

Once you have the mold, parts are cheap, basically material cost per
pound plus machine time plus setup. Because it is a bit expensive, it acts
as a kind of barrier to entry for small companies, which can be good or
bad depending on your perspective.

If you can't justify this with your quantities/prices then you can look
at having standard enclosures modified. This is expensive, but you can
buy smaller quantities and little tooling cost.

Best regards,

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Spehro Pefhany --"it's the network..."            "The Journey is the reward"
spam_OUTspeffTakeThisOuTspaminterlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com
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2000\06\15@171851 by Damon Hopkins

flavicon
face
Andrew Seddon wrote:
>
> Hi all,
>    I am designing a item that would benefit from a custom molded case.
> However I don`t really know how to go about doing this.. Any suggestions??
> While I`m on the subject does anybody know of a plastic/glass like material
> that can be turned opaque/clear via voltage/current.. I have searched the
> internet extensivly and can find nothing.. I know it exists as I saw it on
> Tommorows World once.
>
> Thanks for any help.
I remember seeing electronically dimmed windows on some home show along
time ago.. but that's about it.

Damon Hopkins

2000\06\15@172723 by l.allen

picon face
Andrew Seddon wrote:
> >
> > Hi all,
> >    I am designing a item that would benefit from a custom molded case.
> > However I don`t really know how to go about doing this.. Any suggestions??
> > While I`m on the subject does anybody know of a plastic/glass like material
> > that can be turned opaque/clear via voltage/current.. I have searched the
> > internet extensivly and can find nothing.. I know it exists as I saw it on
> > Tommorows World once.
> >

http://www.aoptic.com

Only thing is.. I couldnt get them to send me a quote... you might
have more luck.
The surprising thing is, some of the LCD shutters can transition
clear to dark, dark to clear in 100uS
_____________________________

Lance Allen
Technical Officer
Uni of Auckland
Psych Dept
New Zealand

http://www.psych.auckland.ac.nz

_____________________________

2000\06\15@173147 by Dale Botkin

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face
On Thu, 15 Jun 2000, Damon Hopkins wrote:

> Andrew Seddon wrote:
> >
> > Hi all,
> >    I am designing a item that would benefit from a custom molded case.
> > However I don`t really know how to go about doing this.. Any suggestions??
> > While I`m on the subject does anybody know of a plastic/glass like material
> > that can be turned opaque/clear via voltage/current.. I have searched the
> > internet extensivly and can find nothing.. I know it exists as I saw it on
> > Tommorows World once.
> >
> > Thanks for any help.
> I remember seeing electronically dimmed windows on some home show along
> time ago.. but that's about it.

Which is extremely, way cool and something I've been predicting for car
windows for a long time.  The one you saw (I saw it too) was a giant LCD.
Probably tousands of dollars, but well worth it just for sheer geek
appeal, don't you think?

Dale
---
The most exciting phrase to hear in science, the one that heralds new
discoveries, is not "Eureka!" (I found it!) but "That's funny ..."
               -- Isaac Asimov

2000\06\15@175845 by Arthur Brown

flavicon
face
The People that did that are based in Liverpool UK and are in the Royal
Albert Dock.
I can't remember the name buy they did glass-door signs and window displays.

Regards Art

{Original Message removed}

2000\06\15@182147 by goflo

flavicon
face
LCD "electronic" filters for welding helmets have been
around for years now - One I looked at claimed 1 ms response,
min to max attenuation.
I decided to opt out of the field test, still using #14's...

regards, Jack

2000\06\15@224542 by Bruce A. Francis

flavicon
face
Andrew,

At least one version of the panels you describe can be found in Houston at
Electronics Parts Outlet (EPO). When I was in there last week, they had
several in a bin on the floor and best I can recall were roughly 8 X 10" in
size. Do not remember the price but my thought at the time was "not bad" but
could not come up with a reasonable excuse to buy one. You might get lucky
and find some left.

http://www.epo-houston.com/main.htm

Regards,

Bruce
.....qseaKILLspamspam@spam@alpha1.net


{Original Message removed}

2000\06\16@022844 by markwillcox56

picon face
<x-flowed>Polaroid makes the LCD stuff, also, you can get welding goggles that do what
you want.

>From: Andrew Seddon <seddonaspamKILLspamHOTMAIL.COM>
>Reply-To: pic microcontroller discussion list <.....PICLISTKILLspamspam.....MITVMA.MIT.EDU>
>To: EraseMEPICLISTspam_OUTspamTakeThisOuTMITVMA.MIT.EDU
>Subject: [OT]:Casing for electronics items.
>Date: Thu, 15 Jun 2000 21:28:56 +0100
>
>Hi all,
>    I am designing a item that would benefit from a custom molded case.
>However I don`t really know how to go about doing this.. Any suggestions??
>While I`m on the subject does anybody know of a plastic/glass like material
>that can be turned opaque/clear via voltage/current.. I have searched the
>internet extensivly and can find nothing.. I know it exists as I saw it on
>Tommorows World once.
>
>Thanks for any help.

________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

</x-flowed>

2000\06\16@062559 by Andrew Seddon

picon face
> Which is extremely, way cool and something I've been predicting for car
> windows for a long time.  The one you saw (I saw it too) was a giant LCD.
> Probably tousands of dollars, but well worth it just for sheer geek
> appeal, don't you think?
>

Is that what it was! I didn`t realise. Unfortunately that is pretty crappy
for my application. I really just wanted a sheet of plastic or something
like that.. I am sure somebody must make it as you can get plastics that
emit light etc.. Its just a matter of finding the damm company, then getting
them to sell me a single sheet rather than there minimum order of 20 billion
or whatever it may be.. I`m not bitter honest!

2000\06\16@063233 by Spehro Pefhany

picon face
At 10:36 PM 6/15/00 +0100, you wrote:
>> Which is extremely, way cool and something I've been predicting for car
>
>Is that what it was! I didn`t realise. Unfortunately that is pretty crappy
>for my application. I really just wanted a sheet of plastic or something
>like that.. I am sure somebody must make it as you can get plastics that
>emit light etc.. Its just a matter of finding the damm company, then getting
>them to sell me a single sheet rather than there minimum order of 20 billion
>or whatever it may be.. I`m not bitter honest!

Polaroid has been doing work in plastic LCD's for many years, they may
have a sample kit or whatever available.

Best regards,


=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speffspamspam_OUTinterlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

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