[optacon-l] Re: Tactile Array [was: : TSI and the Good Old days!]
- From: gerald.g.weichbrodt@xxxxxx
- To: optacon-l@xxxxxxxxxxxxx
- Date: Tue, 13 Jan 2009 11:51:35 -0500
I agree. I thought I heard once that the Video TIM had pin spacing
similar to a braille cell and that that coarseness of resolution was one
thing people didn't like.
Regards,
Jerry
"Paula and James Muysenberg" <outofsightlife@xxxxxxxxx>
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01/13/2009 11:37 AM
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[optacon-l] Tactile Array [was: : TSI and the Good Old days!]
Keith,
I agree that the array is the biggest problem. Personally, I wouldn't
want pins as big as those used for braille displays. The benefit of the
optacon, at least with the R1, was that it could show tiny differences
between letters. Years ago, I used to read Hebrew a little, and those tiny
differences were really important in knowing which letter was which. Even
with English, there are times when I need to distinguish between a period
and a
comma, for example, and depending on the print, that can be a challenge.
Regards,
Paula
----- Original Message -----
From: "Keith Shaw" <scitech200@xxxxxxxxx>
To: <optacon-l@xxxxxxxxxxxxx>
Sent: Tuesday, January 13, 2009 7:15 AM
Subject: [optacon-l] Re: TSI and the Good Old days!
> Hi Nigel and list,
>
> Thank you for responding and I too apologize for getting off topic.
>
> However, I also have been following a wide range of developing
technologies for braille cell actuators; which could, perhaps,
> also be used to fabricate an oscillatory Optacon array. The evolving
database of patents and worldwide R&D projects, both current and failed,
is
extensive.
>
> My personal opinion is that no real progress can be expected for the
design of a "new" Optacon until an array of actuators can be developed to
replace the piezo-based array used in both the R1 and R2 Optacons. This
new
array is required to duplicate the Optacon mechanical specifications for
interaction with the reader's finger, to operate reliably for billions of
cycles and aslo must be produced at a cost less than one thousand dollars
(hopefully way less). To say the least, this is a very difficult task. By
comparison the camera, electronics and software are relatively straight
forward engineering tasks - although still time consuming and expensive.
>
> The bad news is that no low cost replacement actuator can be
demonstrated
as of this date, but the good news is that many individuals worldwide are
working on it!
>
> Regards,
> Keith
>
>
> ----- Original Message ----
> From: Pentronics <service@xxxxxxxxxxxxxxxxx>
> To: optacon-l@xxxxxxxxxxxxx
> Sent: Monday, January 12, 2009 7:10:17 PM
> Subject: [optacon-l] Re: TSI and the Good Old days!
>
> Hi Keith,
>
> If I remember correctly the cells from that calculator used a cam
> arrangement driven by a miniature servo motor. Clever idea but I think
the
> resultant cell size was a little larger than standard. Unfortunately I
have
> not seen one in a long time. I'll if I can find an old contact at
Robotron.
> (I've known Tim a very long time - best not to count the years.)
>
> (Sorry list - I realise this is a bit off topic.)
>
> All the best,
> Nigel
>
> Pentronics
> 33B Sheppard Road
> EMU PLAINS NSW 2750
> AUSTRALIA
> PO Box 965
> PENRITH NSW 2751
> Tel. +612 4735 7355
> e-mail service@xxxxxxxxxxxxxxxxx
> web. www.pentronics.com.au
>
>
>
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