Semi-OT: Touch sensors

Tyler Aviss tjaviss-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org
Mon Oct 29 15:38:39 UTC 2007


The touchscreen I already have (the lilliput). What I want to do is
install a frame that will respond to touch by turning the display's
power on or off.

On 10/29/07, Colin McGregor <colinmc151-bJEeYj9oJeDQT0dZR+AlfA at public.gmane.org> wrote:
> --- Tyler Aviss <tjaviss-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> wrote:
> > Hello All,
> >
> > One of my ongoing projects has been to wire up a few
> > mini-ITX boards
> > as "media control" PC's for around the house.
> > Basically the idea is
> > that the board connects to the main household server
> > via PXE-boot,
> > NFS-mount, etc. It will be attached to a lilliput
> > touchscreen (for
> > which the linux drivers work nicely, BTW).
> >
> > Now the end-plan for this is to move the touchscreen
> > into a picture
> > frame, with the rest of the wiring in-wall or just
> > otherwise somehow
> > safely hidden. What I would like to do is have a
> > touch-sensor attached
> > to either the picture frame or perhaps a little
> > plaque attached to a
> > wooden frame. Like a touch-lamp, the sensor would
> > then turn on the
> > screen. Depending on how fast I can get my boot-time
> > going with
> > openbios and "sleep" modes, the motherboard...
> > although I may just opt
> > to leave this on 90% of the time since via boards
> > consume very little
> > power.
> >
> > Anyhow, feel free to critique the idea as a whole,
> > but my main
> > question at this point is:
> > where do I find the equipment needed to make a
> > touch-sensitive metal
> > surface for the frame/plaque.
> >
> > Any ideas?
>
> I'm not quite sure what your goal is here. Simple
> on/off control or something a bit more complex.
>
> For simple on/off, and a metal plaque your talking
> the fodder of umpteen hundreds of introductory
> electronics books / magazines.
>
> For a level up from that and any surface, a number of
> years ago I read a construction article in a home
> automation magazine that had a small LCD module that
> sort of did a touch screen. What they did was mount a
> set of infrared LEDs and light sensors in pairs around
> the LCD module. Fingertip interrupting the beam told
> the automation system that the display was being
> touched and about over which area of the display was
> being touched. A bit of menu software and presto a
> home control system by fingertip. One point in the
> above that I recall them putting emphasis on was you
> want the light sensors at the top and the light
> sources at the bottom (to reduce false triggers by
> sunlight etc..
>
> For a level above this, I'm not sure ... gut the likes
> of a Palm Pilot?
>
> Colin McGregor
> --
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-- 
Tyler Aviss
Systems Support
LPIC/LPIC-2
(647) 477-1784
--
The Toronto Linux Users Group.      Meetings: http://gtalug.org/
TLUG requests: Linux topics, No HTML, wrap text below 80 columns
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