>
> why are we mucking with motors,
> I saw a set up, where two mirrors were glued onto speakers, so that the
> mirror tilted when the speaker bounced, two speakers one for horizontal,
> and one for verticle. by controling the wave form through the speakers you
> draw with the beam, all you have to do is run scanning waveforms into the
> speaker, (which is built for high frequency signals) and then synchrosie
> the blinking of the light.
> the had part would be syncronising the left right and the up down to each
> other and to the blinking of the light, but if one controller was
> outputing all the waveforms?
Already in existence and actually pretty easy to come up with...
Check out www.mi-lasers.com in their products under laser light shows.
The X-Y scanners are high frequency response (300 Hz+). They are not
optimum for doing all the xy but split in half each unit would be a
great y generator and then you could use a row of leds and a lense. (see
crude diagram below)
<o> <- eye
L\ \ /
L \ \ /
L \ O <- lense
L \ |
L \ v- lense |
L \ |
L \ | /
L () ===== / <- y scanner mirror
L / /
L /
L /
L /
L /
L /
L/
If you wanted to have higher resolution you could probably use both x
and y and feed the x with a stepped square wave and multiply the led
output.
I know this is not the best design but it is done with readily available
parts that are relatively cheap. The lenses would be the hardest part
but should be standard ones.
Ideas anyone? :)
>
...
>
> thoughts?
> thanks
>
> sam
>
>
>
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--
Todd Freeman
CS Unix Support
CAST Online Editor
Web site: http://www.andrews.edu/~freeman/
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