SV: [basicstamps] Re: Heads up display

Archiver

Greetings!

Have you looked at those 'projection displays'(usually clocks) that use
a laser beam to write on the wall?
Fighter aircraft HUD's works on a similar principle; a projector
pointing up to draw either directly on the windshield(rare) or onto a
glass plate mounted at an angle.

:-)
Trygve

---

Opprinnelig melding

---

Fra: Mark Marpet [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=fAU8Wx8IcpKGL7KYiV3hw9k6yZ7mflRlj4qe0vkOazaiNrCBlDRXtq5nAV5a5LJTE_gmiVkLyUdWNNCWxQ]marpetm@s...[/url
Sendt: 14. desember 2003 17:17
Til: basicstamps@yahoogroups.com
Emne: Re: [noparse][[/noparse]basicstamps] Re: Heads up display


Thanks.
My understanding of the Glasstron is that it is like a
wear-on-your-head monitor, which is not really appropriate for
superposing an image on the ambient environment. Reviews indicate that,
even though it can let SOME of the outside world in, it's not enough to
integrate outside world and display together.
What I'm looking for, and this is an analogy, is something that I
could drive a car with, and have it superpose information on my field
of view (rather than replacing my field of view). Something like the
infra-red night-vision heads-up-display system that's an option (or was
an option) on Caddys.


On Dec 14, 2003, at 4:02 AM, arridh_shashank wrote:

> My friend has a sony Glasstron. Its somewhat like a virtual reality
> glasses type display that covers your entire field of view. It accepts

> a S-video and composite input. We have successfully used a video title

> generator circuit to put text onto the display using a stamp. Thats as

> close I have come upto a HUD.
>

> --- In basicstamps@yahoogroups.com, "mmarpet" <marpetm@s...> wrote:

>> This may be (a little bit) off topic, but is anyone familiar with a
>> generic heads- up display that can be driven by either a Stamp or by
>> a VGA or similar display driver?


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Archiver

Thanks Trygve!
That's a rather cool idea. Do you know of anybody who has hacked one
of those devices?
-MArk



On Dec 14, 2003, at 11:22 AM, Trygve Henriksen wrote:

> Greetings!
>
> Have you looked at those 'projection displays'(usually clocks) that use
> a laser beam to write on the wall?
> Fighter aircraft HUD's works on a similar principle; a projector
> pointing up to draw either directly on the windshield(rare) or onto a
> glass plate mounted at an angle.
>
> :-)
> Trygve
>
>
>

---

Opprinnelig melding

---

> Fra: Mark Marpet [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=pMQLfCiL_9xV2nN8egHsxtF6JxWPWAwloxbOIUGrKKCTaJko-ORQwk3RM0lveajeWbGZoUhC8itcUcdRYnY]marpetm@s...[/url
> Sendt: 14. desember 2003 17:17
> Til: basicstamps@yahoogroups.com
> Emne: Re: [noparse][[/noparse]basicstamps] Re: Heads up display
>
>
> Thanks.
> My understanding of the Glasstron is that it is like a
> wear-on-your-head monitor, which is not really appropriate for
> superposing an image on the ambient environment. Reviews indicate that,
> even though it can let SOME of the outside world in, it's not enough to
> integrate outside world and display together.
> What I'm looking for, and this is an analogy, is something that I
> could drive a car with, and have it superpose information on my field
> of view (rather than replacing my field of view). Something like the
> infra-red night-vision heads-up-display system that's an option (or was
> an option) on Caddys.
>
>
> On Dec 14, 2003, at 4:02 AM, arridh_shashank wrote:
>
>> My friend has a sony Glasstron. Its somewhat like a virtual reality
>> glasses type display that covers your entire field of view. It accepts
>
>> a S-video and composite input. We have successfully used a video title
>
>> generator circuit to put text onto the display using a stamp. Thats as
>
>> close I have come upto a HUD.
>>
>
>> --- In basicstamps@yahoogroups.com, "mmarpet" <marpetm@s...> wrote:
>
>>> This may be (a little bit) off topic, but is anyone familiar with a
>>> generic heads- up display that can be driven by either a Stamp or by
>>> a VGA or similar display driver?
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
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> http://docs.yahoo.com/info/terms/
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>
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Archiver

I'm afraid that to "use a laser beam to write on the wall" would be out of
the clock price range by several hundred dollars. Such a device would have
to have some mechanical means of sweeping the beam in two axes at once, at
extremely high speeds. You'd need a couple of galvanometers (expensive
little buggers, but basically a mirror on a shaft which is rotated
magnetically) as well as high-speed controller circuitry capable of driving
the galvos fast enough to create a readable display. We're talking hundreds
to thousands of dollars here. The clocks you see in stores and catalogs
simply focus light from a high-power LED through a liquid crystal display
and then through a projection lens and onto a wall or ceiling. These might
be relatively easy to hack, but all you would get is a four-digit numerical
display. Another issue is that you really need a dark room to see them. If
these issues are not a problem, you can get a projecting clock for about
$20-$30 these days and it might make a fun project.
Another thing that can be done is to take apart an LCD module, carefully
peel off the reflective backing (really really hard to do), and put it in a
slide projector. People have done this with handheld TV's with reasonable
success.

What exactly are you trying to display? Simple numerical values? Text?
Graphics?

--
Greg Courville
http://www.gee-enginuity.com/
"Make it idiot-proof, and somebody'll make a better idiot"


>Thanks Trygve!
> That's a rather cool idea. Do you know of anybody who has hacked one
> of those devices?
> -MArk
>
>
> > Have you looked at those 'projection displays'(usually clocks) that use
> > a laser beam to write on the wall?

Archiver

What I was thinking is to develop a HUD for a flight simulator. Not
something generated in software on the screen but, rather, something
that could ultimately (recognizing the one-strike-and-your-out
environment of the real flight world) be ruggedized and used to tap
generate flight information. (Actually, the dangerousness aspect is
somewhat bogus, as this kind of thing replaces nothing. It only
supplements what's already there.) So text would be good, but graphics
would be batter. Ultimately, you have t o start somewhere, so simple to
start would probably be the way to go. In other words, you need to
obtain or develop the projection hardware first. I figure that a Stamp
would be a fine test bed. If the hardware works with a stamp, which
would of course be text-based, that same hardware could be adapted to a
graphical, more complex feature set. You gotta crawl before you walk;
being able to display airspeed and heading would be a good start. A
full-blown flight director would be a good finish. But THAT would be
way beyond my capability or budget.

On Dec 14, 2003, at 1:41 PM, KG6SGY wrote:

> I'm afraid that to "use a laser beam to write on the wall" would be
> out of
> the clock price range by several hundred dollars. Such a device would
> have
> to have some mechanical means of sweeping the beam in two axes at
> once, at
> extremely high speeds. You'd need a couple of galvanometers (expensive
> little buggers, but basically a mirror on a shaft which is rotated
> magnetically) as well as high-speed controller circuitry capable of
> driving
> the galvos fast enough to create a readable display. We're talking
> hundreds
> to thousands of dollars here. The clocks you see in stores and catalogs
> simply focus light from a high-power LED through a liquid crystal
> display
> and then through a projection lens and onto a wall or ceiling. These
> might
> be relatively easy to hack, but all you would get is a four-digit
> numerical
> display. Another issue is that you really need a dark room to see
> them. If
> these issues are not a problem, you can get a projecting clock for
> about
> $20-$30 these days and it might make a fun project.
> Another thing that can be done is to take apart an LCD module,
> carefully
> peel off the reflective backing (really really hard to do), and put it
> in a
> slide projector. People have done this with handheld TV's with
> reasonable
> success.
>
> What exactly are you trying to display? Simple numerical values? Text?
> Graphics?
>
> --
> Greg Courville
> http://www.gee-enginuity.com/
> "Make it idiot-proof, and somebody'll make a better idiot"
>
>
>> Thanks Trygve!
>> That's a rather cool idea. Do you know of anybody who has hacked
>> one
>> of those devices?
>> -MArk
>>
>>
>>> Have you looked at those 'projection displays'(usually clocks) that
>>> use
>>> a laser beam to write on the wall?
>
>
>
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